/* TechHub Pro - Next Level CSS Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Color System - Modern Dark Theme */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;
  
  --accent-50: #fdf4ff;
  --accent-100: #fae8ff;
  --accent-200: #f5d0fe;
  --accent-300: #f0abfc;
  --accent-400: #e879f9;
  --accent-500: #d946ef;
  --accent-600: #c026d3;
  --accent-700: #a21caf;
  --accent-800: #86198f;
  --accent-900: #701a75;
  
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  --success-500: #10b981;
  --warning-500: #f59e0b;
  --error-500: #ef4444;
  
  /* Additional Colors for Design */
  --bg-gradient: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 50%, var(--primary-900) 100%);
  --text-primary: var(--neutral-50);
  --text-secondary: var(--neutral-300);
  --text-muted: var(--neutral-500);
  --bg-dark: var(--neutral-800);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-sans);
  color: var(--neutral-100);
  background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
  overflow-x: hidden;
  min-height: 100vh;
}

/* =============================
   AI Sections – Ultra Modern Design with Stunning Visuals
   Advanced glass morphism, dynamic gradients, and micro-interactions
   ============================= */

/* AI Capabilities */
.ai-capabilities-section {
  padding: var(--space-4xl) 0;
  position: relative;
  background: linear-gradient(135deg, 
    rgba(14, 165, 233, 0.03) 0%, 
    rgba(217, 70, 239, 0.03) 50%, 
    rgba(16, 185, 129, 0.03) 100%);
}

.ai-capabilities-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 50%, rgba(217, 70, 239, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.capability-item {
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.12) 0%, 
    rgba(255, 255, 255, 0.06) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(20px);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.capability-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--primary-500), 
    var(--accent-500), 
    #10b981);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.capability-item::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, 
    transparent, 
    rgba(14, 165, 233, 0.1), 
    transparent, 
    rgba(217, 70, 239, 0.1), 
    transparent);
  opacity: 0;
  transition: opacity 0.6s ease;
  animation: rotate 20s linear infinite;
  pointer-events: none;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.capability-item:hover::before { 
  transform: scaleX(1); 
}

.capability-item:hover::after { 
  opacity: 1; 
}

.capability-item:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: rgba(14, 165, 233, 0.4);
  box-shadow: 0 25px 50px rgba(14, 165, 233, 0.2),
              0 0 50px rgba(217, 70, 239, 0.15);
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.16) 0%, 
    rgba(255, 255, 255, 0.08) 100%);
}

.capability-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 2.2rem;
  color: white;
  background: linear-gradient(135deg, 
    var(--primary-500), 
    var(--accent-500), 
    #10b981);
  box-shadow: 0 15px 35px rgba(14, 165, 233, 0.4);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
}

.capability-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, 
    rgba(255, 255, 255, 0.2), 
    transparent, 
    rgba(255, 255, 255, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.capability-item:hover .capability-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 20px 40px rgba(14, 165, 233, 0.6);
}

.capability-item:hover .capability-icon::before {
  opacity: 1;
}

.capability-item h3 { 
  color: var(--neutral-50); 
  margin-bottom: 1rem; 
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.capability-item:hover h3 {
  background: linear-gradient(135deg, #ffffff 0%, #0ea5e9 50%, #d946ef 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.capability-item p { 
  color: var(--neutral-300); 
  line-height: 1.6;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.capability-item:hover p {
  color: var(--neutral-200);
}

/* How AI Works */
.how-ai-works-section {
  padding: var(--space-4xl) 0;
  position: relative;
  background: linear-gradient(135deg, 
    rgba(16, 185, 129, 0.03) 0%, 
    rgba(14, 165, 233, 0.03) 50%, 
    rgba(217, 70, 239, 0.03) 100%);
}

.how-ai-works-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 40%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.ai-process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.process-step {
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.12) 0%, 
    rgba(255, 255, 255, 0.06) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(20px);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    #10b981, 
    var(--primary-500), 
    var(--accent-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.process-step:hover::before {
  transform: scaleX(1);
}

.process-step:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 25px 50px rgba(16, 185, 129, 0.2),
              0 0 50px rgba(14, 165, 233, 0.15);
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.16) 0%, 
    rgba(255, 255, 255, 0.08) 100%);
}

.how-ai-works-section .step-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #10b981, var(--primary-500), var(--accent-500));
  color: white;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 15px 35px rgba(16, 185, 129, 0.4);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
}

.how-ai-works-section .step-number::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, 
    rgba(255, 255, 255, 0.2), 
    transparent, 
    rgba(255, 255, 255, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.process-step:hover .step-number {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 20px 40px rgba(16, 185, 129, 0.6);
}

.process-step:hover .step-number::before {
  opacity: 1;
}

.how-ai-works-section .step-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  transition: transform 0.3s ease;
}

.process-step:hover .step-icon {
  transform: scale(1.1) rotate(5deg);
}

.process-step h3 { 
  color: var(--neutral-50); 
  margin-bottom: 1rem; 
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.process-step:hover h3 {
  background: linear-gradient(135deg, #ffffff 0%, #10b981 50%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.process-step p { 
  color: var(--neutral-300); 
  line-height: 1.6;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.process-step:hover p {
  color: var(--neutral-200);
}

/* AI Ethics */
.ai-ethics-section { 
  padding: var(--space-4xl) 0; 
  position: relative;
  background: linear-gradient(135deg, 
    rgba(217, 70, 239, 0.03) 0%, 
    rgba(16, 185, 129, 0.03) 50%, 
    rgba(14, 165, 233, 0.03) 100%);
}

.ai-ethics-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 25% 25%, rgba(217, 70, 239, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 75% 75%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.ethics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.ethics-item {
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.12) 0%, 
    rgba(255, 255, 255, 0.06) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(20px);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.ethics-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--accent-500), 
    #10b981, 
    var(--primary-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ethics-item:hover::before {
  transform: scaleX(1);
}

.ethics-item:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: rgba(217, 70, 239, 0.4);
  box-shadow: 0 25px 50px rgba(217, 70, 239, 0.2),
              0 0 50px rgba(16, 185, 129, 0.15);
  background: linear-gradient(145deg, 
    rgba(255, 255, 255, 0.16) 0%, 
    rgba(255, 255, 255, 0.08) 100%);
}

.ethics-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 2rem;
  color: white;
  background: linear-gradient(135deg, var(--accent-500), #10b981, var(--primary-500));
  box-shadow: 0 15px 35px rgba(217, 70, 239, 0.4);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
}

.ethics-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, 
    rgba(255, 255, 255, 0.2), 
    transparent, 
    rgba(255, 255, 255, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.ethics-item:hover .ethics-icon {
  transform: scale(1.1) rotate(-3deg);
  box-shadow: 0 20px 40px rgba(217, 70, 239, 0.6);
}

.ethics-item:hover .ethics-icon::before {
  opacity: 1;
}

.ethics-item h3 { 
  color: var(--neutral-50); 
  margin-bottom: 1rem; 
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all 0.3s ease;
}

.ethics-item:hover h3 {
  background: linear-gradient(135deg, #ffffff 0%, #d946ef 50%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ethics-item p { 
  color: var(--neutral-300); 
  line-height: 1.6;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.ethics-item:hover p {
  color: var(--neutral-200);
}

@media (max-width: 768px) {
  .capabilities-grid,
  .ai-process-grid,
  .ethics-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .capability-item, 
  .process-step, 
  .ethics-item { 
    padding: 2rem 1.5rem; 
  }
  
  .capability-icon { 
    width: 64px; 
    height: 64px; 
    font-size: 1.8rem; 
  }
  
  .ethics-icon {
    width: 64px;
    height: 64px;
    font-size: 1.8rem;
  }
  
  .how-ai-works-section .step-number {
    width: 50px;
    height: 50px;
    font-size: 1.3rem;
  }
  
  .capability-item h3,
  .process-step h3,
  .ethics-item h3 {
    font-size: 1.3rem;
  }
}

/* Animated Background */
.animated-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 50%, var(--primary-900) 100%);
}

.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--primary-400), var(--accent-400));
  opacity: 0.1;
  animation: float 20s infinite linear;
}

.shape-1 {
  width: 80px;
  height: 80px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 120px;
  height: 120px;
  top: 60%;
  right: 20%;
  animation-delay: -5s;
}

.shape-3 {
  width: 60px;
  height: 60px;
  bottom: 20%;
  left: 20%;
  animation-delay: -10s;
}

.shape-4 {
  width: 100px;
  height: 100px;
  top: 80%;
  left: 60%;
  animation-delay: -15s;
}

.shape-5 {
  width: 40px;
  height: 40px;
  top: 40%;
  right: 10%;
  animation-delay: -7s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
    opacity: 0.1;
  }
  25% {
    transform: translateY(-20px) rotate(90deg);
    opacity: 0.2;
  }
  50% {
    transform: translateY(-40px) rotate(180deg);
    opacity: 0.1;
  }
  75% {
    transform: translateY(-20px) rotate(270deg);
    opacity: 0.2;
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-50);
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h4 { font-size: clamp(1.25rem, 3vw, 2rem); }

p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--neutral-300);
}

/* Layout Components */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--neutral-400);
  max-width: 600px;
  margin: 0 auto;
}

/* Enhanced Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: var(--glass-shadow);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  min-height: 80px;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--primary-400);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.05);
}

.logo-icon {
  font-size: 2rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.brand-text {
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.nav-link {
  position: relative;
  text-decoration: none;
  color: var(--neutral-300);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-400);
  background: var(--glass-bg);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-400), var(--accent-400));
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Enhanced Search */
.search-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 300px;
  padding: var(--space-md) var(--space-xl);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-full);
  outline: none;
  font-size: 1rem;
  transition: all var(--transition-normal);
  background: var(--glass-bg);
  color: var(--neutral-100);
  backdrop-filter: blur(10px);
}

@media (max-width: 900px) {
  .search-input {
    width: 160px;
    padding-right: calc(var(--space-lg) + 28px);
  }

  .mobile-menu-btn {
    display: flex;
  }
}

.queue-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.04);
  margin-bottom: 10px;
}

.queue-info { flex: 1 1 auto; min-width: 0; }
.queue-url { color: var(--text-primary); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.queue-details { color: var(--text-secondary); font-size: 0.9rem; }
.remove-btn { background: none; border: none; color: var(--text-secondary); font-size: 18px; cursor: pointer; padding: 6px; border-radius: 6px; }
.remove-btn:hover { color: var(--primary-400); background: rgba(255,255,255,0.02); }

.search-input:focus {
  border-color: var(--primary-400);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

.search-input::placeholder {
  color: var(--neutral-400);
}

.search-btn {
  position: absolute;
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--neutral-400);
  font-size: 1.25rem;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.search-btn:hover {
  color: var(--primary-400);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: var(--space-sm);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--primary-400);
  transform: scale(1.1);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: var(--z-fixed);
}

.mobile-menu-btn span {
  width: 24px;
  height: 3px;
  background: var(--neutral-300);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover span {
  background: var(--primary-400);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100%;
  background: var(--neutral-800);
  border-left: 1px solid var(--neutral-600);
  padding: var(--space-2xl) var(--space-lg);
  z-index: var(--z-modal);
  transition: right var(--transition-normal);
  overflow-y: auto;
}

.mobile-menu-overlay.active .mobile-menu-content {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--neutral-600);
}

.mobile-menu-close {
  background: none;
  border: none;
  color: var(--neutral-300);
  font-size: 24px;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
  background: var(--neutral-700);
  color: var(--primary-400);
}

.mobile-menu-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-menu-nav a {
  color: var(--neutral-300);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.mobile-menu-nav a:hover,
.mobile-menu-nav a.active {
  color: var(--primary-400);
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--primary-400);
}

.mobile-menu-nav a.active {
  background: rgba(14, 165, 233, 0.2);
}

/* Hero Section */
.hero {
  position: relative;
  padding: calc(80px + var(--space-4xl)) 0 var(--space-4xl);
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.hero-content {
  z-index: 1;
}

.hero-title {
  margin-bottom: var(--space-xl);
}

.title-line {
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: slideInUp 0.8s ease-out forwards;
}

.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.4s; }

.title-line.highlight {
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  margin-bottom: var(--space-2xl);
  font-size: 1.25rem;
  color: var(--neutral-300);
  opacity: 0;
  transform: translateY(20px);
  animation: slideInUp 0.8s ease-out 0.6s forwards;
}

.hero-actions {
  display: flex;
  gap: var(--space-lg);
  opacity: 0;
  transform: translateY(20px);
  animation: slideInUp 0.8s ease-out 0.8s forwards;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* AI hero neural preview */
.ai-hero .ai-preview {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1/1;
  border-radius: 24px;
  background: radial-gradient(1200px 600px at 20% 10%, rgba(56,189,248,0.15), transparent),
              radial-gradient(900px 500px at 80% 80%, rgba(217,70,239,0.12), transparent),
              rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 30px 60px rgba(0,0,0,0.35);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

/* Optional hero image card: hidden by default until JS sets background */
.ai-hero .hero-image-card {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity .6s ease, transform .6s ease;
  filter: saturate(1.05) contrast(1.05) brightness(0.95);
}

.ai-hero .hero-image-card.is-visible {
  opacity: 1;
  transform: scale(1);
}

.ai-hero .ai-preview.has-image .neural-network,
.ai-hero .ai-preview.has-image .ai-pulse { display: none; }

.ai-hero .neural-network {
  position: absolute;
  inset: 10% 10% 10% 10%;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.ai-hero .neuron {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, #a78bfa, #6366f1);
  box-shadow: 0 0 12px rgba(99,102,241,0.8);
  animation: neuronPulse 2.4s ease-in-out infinite;
}

.ai-hero .neuron:nth-child(3n) { animation-delay: .2s; }
.ai-hero .neuron:nth-child(4n) { animation-delay: .4s; }
.ai-hero .neuron:nth-child(5n) { animation-delay: .6s; }

@keyframes neuronPulse {
  0%,100% { transform: scale(1); filter: drop-shadow(0 0 0 rgba(56,189,248,0)); }
  50% { transform: scale(1.6); filter: drop-shadow(0 0 16px rgba(56,189,248,0.6)); }
}

.ai-hero .ai-pulse::after {
  content: '';
  position: absolute;
  inset: -20%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(56,189,248,0.15), transparent 60%);
  animation: slowPulse 6s ease-in-out infinite;
}

@keyframes slowPulse {
  0%,100% { transform: scale(1); opacity: .6; }
  50% { transform: scale(1.06); opacity: .9; }
}

/* Next-level AI thinking overlay (hero preview) */
.ai-hero .ai-output {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  pointer-events: none;
}

.ai-hero .ai-output .output-text {
  font-weight: 700;
  letter-spacing: 0.3px;
  background: linear-gradient(90deg, var(--primary-300), var(--accent-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 10px rgba(56,189,248,0.25));
}

.ai-hero .typing-indicator {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.ai-hero .typing-indicator span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #a78bfa, #6366f1);
  box-shadow: 0 0 12px rgba(99,102,241,0.85);
  animation: typingDot 1.2s ease-in-out infinite;
}

.ai-hero .typing-indicator span:nth-child(2) { animation-delay: .12s; }
.ai-hero .typing-indicator span:nth-child(3) { animation-delay: .24s; }
.ai-hero .typing-indicator span:nth-child(4) { animation-delay: .36s; }
.ai-hero .typing-indicator span:nth-child(5) { animation-delay: .48s; }
.ai-hero .typing-indicator span:nth-child(6) { animation-delay: .60s; }

@keyframes typingDot {
  0%, 100% { transform: translateY(0) scale(0.9); opacity: 0.5; }
  50% { transform: translateY(-4px) scale(1.15); opacity: 1; }
}

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: transform .6s ease, opacity .6s ease; }
.reveal-in { opacity: 1; transform: translateY(0); }

/* Floating Cards Animation */
.floating-card {
  position: absolute;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow);
  animation: floatCard 6s ease-in-out infinite;
}

.card-1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.card-2 {
  top: 60%;
  right: 20%;
  animation-delay: -2s;
}

.card-3 {
  bottom: 20%;
  left: 20%;
  animation-delay: -4s;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(2deg); }
  66% { transform: translateY(-10px) rotate(-2deg); }
}

.card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neutral-200);
}

/* Enhanced Button Styles - Professional Design */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-height: 48px;
  line-height: 1.2;
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
  border-color: rgba(14, 165, 233, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* Category Button Styles */
.calc-category-btn,
.ai-category-btn {
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary-400);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 5px;
  backdrop-filter: blur(10px);
}

.calc-category-btn:hover,
.ai-category-btn:hover,
.calc-category-btn.active,
.ai-category-btn.active {
  background: rgba(14, 165, 233, 0.2);
  border-color: var(--primary-400);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.2);
}

/* Tool Action Buttons */
.tool-actions .btn {
  margin: 5px;
  min-width: 120px;
}

.tool-actions .btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.tool-actions .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Quick Calculator Buttons */
.quick-calc-btn {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  color: white;
  border: none;
  border-radius: 12px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(217, 70, 239, 0.3);
}

.quick-calc-btn:hover {
  background: linear-gradient(135deg, var(--accent-400), var(--accent-500));
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(217, 70, 239, 0.4);
}

/* Input Field Styling */
.input-group input,
.input-group select,
.ai-input-section input,
.ai-input-section select,
.ai-input-section textarea {
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(14, 165, 233, 0.3);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  width: 100%;
}

.input-group input:focus,
.input-group select:focus,
.ai-input-section input:focus,
.ai-input-section select:focus,
.ai-input-section textarea:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
  background: rgba(0, 0, 0, 0.4);
}

.input-group input::placeholder,
.ai-input-section textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.tool-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.tool-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.tool-badge {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.tool-title {
  margin-bottom: var(--space-md);
  color: var(--neutral-50);
}

.tool-description {
  margin-bottom: var(--space-lg);
  color: var(--neutral-300);
  line-height: 1.6;
}

.tool-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.feature {
  background: rgba(14, 165, 233, 0.15);
  color: var(--primary-300);
  padding: 6px 12px;
  border-radius: 15px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(14, 165, 233, 0.2);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.feature:hover {
  background: rgba(14, 165, 233, 0.25);
  border-color: rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

.tool-actions {
  display: flex;
  gap: var(--space-md);
}

/* Demo Section */
.demo-section {
  padding: 80px 0;
  background: var(--bg-gradient);
  position: relative;
  overflow: hidden;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.demo-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 30px;
  text-align: center;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.demo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.demo-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.demo-card:hover::before {
  left: 100%;
}

.demo-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
  color: white;
}

.demo-card h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 24px;
  font-weight: 600;
}

.demo-card p {
  color: var(--text-secondary);
  margin-bottom: 25px;
  line-height: 1.6;
}

.demo-container {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 40px;
  margin-top: 30px;
  backdrop-filter: blur(20px);
  display: none;
  min-height: 300px;
}

.demo-container.active {
  display: block;
  animation: slideUp 0.5s ease;
}

/* Calculator Demo */
.calculator-demo {
  text-align: center;
}

.calculator-demo h3 {
  color: var(--text-primary);
  margin-bottom: 30px;
  font-size: 28px;
}

.calc-display {
  background: var(--bg-dark);
  border: 2px solid var(--primary-500);
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 20px;
  font-size: 32px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  text-align: right;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.calc-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.calc-buttons button {
  padding: 20px 16px;
  font-size: 18px;
  font-weight: 600;
  border: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
}

.calc-keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.calc-keypad .calc-btn {
  padding: 20px 16px;
  font-size: 18px;
  font-weight: 600;
  border: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
}

.calc-buttons button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s;
}

.calc-buttons button:hover::before {
  left: 100%;
}

.calc-buttons button:hover {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(14, 165, 233, 0.3);
  border-color: var(--primary-400);
}

.calc-buttons button:active {
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(14, 165, 233, 0.4);
}

.calc-buttons button.function {
  background: linear-gradient(135deg, rgba(217, 70, 239, 0.2), rgba(217, 70, 239, 0.1));
  border-color: rgba(217, 70, 239, 0.3);
  color: var(--accent-300);
}

.calc-buttons button.function:hover {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  color: white;
  box-shadow: 0 10px 25px rgba(217, 70, 239, 0.3);
}

.calc-buttons button.operator {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--warning-500);
}

.calc-buttons button.operator:hover {
  background: linear-gradient(135deg, var(--warning-500), #d97706);
  color: white;
  box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
}

.calc-buttons button.equals {
  background: linear-gradient(135deg, var(--success-500), #059669);
  color: white;
  border-color: var(--success-500);
  grid-column: span 2;
}

.calc-buttons button.equals:hover {
  background: linear-gradient(135deg, #059669, #047857);
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.calc-buttons button.clear {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--error-500);
}

.calc-buttons button.clear:hover {
  background: linear-gradient(135deg, var(--error-500), #dc2626);
  color: white;
  box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

.calc-buttons button.backspace {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
  border-color: rgba(139, 92, 246, 0.3);
  color: #a78bfa;
}

.calc-buttons button.backspace:hover {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: white;
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
}

/* Calculator Display Styles */
.calc-display-main {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.calc-history {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 5px;
  min-height: 20px;
}

.calc-expression {
  color: var(--text-primary);
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 5px;
  min-height: 30px;
  word-wrap: break-word;
}

.calc-result {
  color: var(--primary-400);
  font-size: 32px;
  font-weight: 700;
  min-height: 40px;
  word-wrap: break-word;
}

/* Mobile responsive calculator */
@media (max-width: 768px) {
  .calc-buttons {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 15px;
  }
  
  .calc-buttons button {
    padding: 16px 12px;
    font-size: 16px;
    min-height: 50px;
  }
  
  .calc-buttons button.equals {
    grid-column: span 2;
  }
}

@media (max-width: 480px) {
  .calc-buttons {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    padding: 10px;
  }
  
  .calc-buttons button {
    padding: 14px 8px;
    font-size: 14px;
    min-height: 45px;
  }
}

/* Downloader Demo */
.downloader-demo {
  text-align: center;
}

.downloader-demo h3 {
  color: var(--text-primary);
  margin-bottom: 30px;
  font-size: 28px;
}

.download-progress {
  margin-bottom: 30px;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background: var(--bg-dark);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 15px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  width: 0%;
  transition: width 0.5s ease;
}

.progress-text {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 600;
}

.downloader-demo button {
  background: var(--primary-500);
  border: none;
  border-radius: 10px;
  padding: 15px 30px;
  font-size: 16px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

.downloader-demo button:hover {
  background: var(--primary-600);
  transform: translateY(-2px);
}

.downloader-demo button:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

/* AI Tool Demo */
.ai-tool-demo {
  text-align: center;
}

.ai-tool-demo h3 {
  color: var(--text-primary);
  margin-bottom: 30px;
  font-size: 28px;
}

.ai-input {
  width: 100%;
  max-width: 400px;
  background: var(--bg-dark);
  border: 2px solid var(--primary-500);
  border-radius: 10px;
  padding: 15px;
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-align: center;
}

.ai-input:focus {
  outline: none;
  border-color: var(--accent-500);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.ai-tool-demo button {
  background: var(--accent-500);
  border: none;
  border-radius: 10px;
  padding: 15px 30px;
  font-size: 16px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

.ai-tool-demo button:hover {
  background: var(--accent-600);
  transform: translateY(-2px);
}

.ai-tool-demo button:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.98);
  transition: opacity 120ms ease-out, transform 120ms ease-out, visibility 0s linear 120ms;
}

.modal-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  max-width: 90%;
  /* Use viewport height to prevent footer from being cut off */
  max-height: 90vh;
  /* Make modal a flex container so body can scroll while footer stays visible */
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(20px);
  will-change: transform, opacity;
}

/* Compact, fast modal variant */
.quick-modal {
  width: 420px;
  max-width: 92vw;
}

.guide-steps-min {
  margin: 0 0 12px 18px;
}

.guide-steps-min li {
  margin: 6px 0;
  color: var(--text-secondary);
}

.example-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 6px 0 12px 0;
}

.example-chip {
  background: rgba(14,165,233,0.15);
  border: 1px solid rgba(14,165,233,0.3);
  color: var(--primary-300);
  border-radius: 9999px;
  padding: 6px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: background 120ms ease;
}

.example-chip:hover { background: rgba(14,165,233,0.25); }

.important-notes.small p {
  margin: 0;
  font-size: 12px;
}

.modal-header {
  padding: 20px 30px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  color: var(--text-primary);
  margin: 0;
  font-size: 24px;
  font-weight: 600;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  padding: 5px;
  border-radius: 5px;
  transition: all 0.3s ease;
}

.close-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.modal-body {
  padding: 30px;
  /* Allow content to scroll while keeping header/footer visible */
  flex: 1 1 auto;
  max-height: 60vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 20px 30px;
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: 15px;
  justify-content: flex-end;
  /* Ensure footer buttons never get pushed out of view */
  flex-shrink: 0;
}

/* Tool Info Modal */
.tool-info-modal {
  width: 500px;
}

.tool-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 25px;
  font-size: 16px;
}

.tool-features-list h4,
.tool-instructions h4 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 18px;
  font-weight: 600;
}

.tool-features-list ul {
  list-style: none;
  padding: 0;
  margin-bottom: 25px;
}

/* Download Guide Modal */
.download-guide-modal {
  max-width: 800px;
  width: 90vw;
}

.download-guide-modal .modal-body {
  padding: 30px;
  max-height: 70vh;
  overflow-y: auto;
}

.guide-section {
  margin-bottom: 30px;
}

.guide-section h4 {
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.guide-steps {
  list-style: none;
  padding: 0;
  counter-reset: step-counter;
}

.guide-steps li {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 15px;
  padding: 15px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.guide-steps li:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(5px);
}

.step-number {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
}

.step-text {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.5;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.tool-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition-normal);
}

.tool-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tool-card h5 {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 15px;
}

.tool-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 15px;
}

.feature-tag {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-300);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-400);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all var(--transition-normal);
}

.tool-link:hover {
  color: var(--primary-300);
  transform: translateX(2px);
}

.important-notes {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.important-notes p {
  color: var(--warning-500);
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.5;
}

.important-notes p:last-child {
  margin-bottom: 0;
}

/* AI Tools Modal */
.ai-tools-modal {
  max-width: 900px;
  width: 90vw;
}

.ai-tools-modal .modal-body {
  padding: 30px;
  max-height: 70vh;
  overflow-y: auto;
}

/* Recommendation lists (Resources modal) */
.category-recommendations {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 10px;
}

.rec-column h4 {
  margin: 0 0 10px 0;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 9999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
}

.rec-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.recommendation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: var(--glass-bg);
  color: var(--text-primary);
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
  will-change: transform;
  animation: fadeUp 240ms ease both;
}

.recommendation:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--primary-500);
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

.rec-name { font-weight: 600; }
.rec-note { color: var(--text-secondary); font-size: 12px; }
.rec-open { color: var(--primary-400); font-weight: 700; letter-spacing: 0.2px; }

/* Column accents (Free / Paid) */
.category-recommendations .rec-column:first-child .recommendation {
  border-left: 3px solid var(--primary-500);
}

.category-recommendations .rec-column:last-child .recommendation {
  border-left: 3px solid var(--accent-500);
}

/* Staggered animation for items */
.rec-list .recommendation:nth-child(1) { animation-delay: 30ms; }
.rec-list .recommendation:nth-child(2) { animation-delay: 60ms; }
.rec-list .recommendation:nth-child(3) { animation-delay: 90ms; }
.rec-list .recommendation:nth-child(4) { animation-delay: 120ms; }
.rec-list .recommendation:nth-child(5) { animation-delay: 150ms; }
.rec-list .recommendation:nth-child(6) { animation-delay: 180ms; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Modal header accent to match AI tools */
.ai-tools-modal .modal-header {
  position: relative;
}

.ai-tools-modal .modal-header::after {
  content: '';
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  opacity: 0.6;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .category-recommendations {
    grid-template-columns: 1fr;
  }
}

/* Resource Modal Styles */
.resource-modal {
  max-width: 800px;
  width: 90vw;
}

/* Download Tools Modal Styles */
.download-tools-modal {
  max-width: 900px;
  width: 90vw;
}

.download-tools-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.resource-modal .modal-body {
  max-height: 70vh;
  overflow-y: auto;
}

.resource-meta {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.meta-badge {
  background: var(--primary-500);
  color: white;
  padding: 5px 12px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
}

.resource-description {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.resource-content {
  margin-bottom: 20px;
}

.resource-content h4 {
  color: var(--text-primary);
  margin: 20px 0 10px 0;
  font-size: 18px;
}

.resource-content ul,
.resource-content ol {
  margin-left: 20px;
  margin-bottom: 15px;
}

.resource-content li {
  margin-bottom: 8px;
  line-height: 1.5;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.topic-tag {
  background: var(--accent-500);
  color: white;
  padding: 4px 12px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 500;
}

/* Quick Calculator Results */
.calc-result-display {
  margin-top: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.result-item {
  margin-bottom: 10px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary-500);
}

.result-item:last-child {
  margin-bottom: 0;
}

.result-item strong {
  color: var(--primary-400);
}

/* Calculator Interface Improvements */
.calculator-interface {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 30px;
  margin: 20px 0;
}

.interface-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.interface-controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

.calculator-main {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 30px;
}

.calculator-sidebar {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-section {
  margin-bottom: 30px;
}

.sidebar-section h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 18px;
}

.history-list {
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 15px;
}

.history-item {
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  margin-bottom: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--text-secondary);
}

.memory-controls {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 15px;
}

.memory-display {
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  color: var(--text-primary);
}

.settings-controls {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setting-item select {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 14px;
}

/* Responsive Design for Calculator */
@media (max-width: 768px) {
  .calculator-main {
    grid-template-columns: 1fr;
  }
  
  .calculator-sidebar {
    order: -1;
  }
  
  .calc-keypad {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 15px;
  }
  
  .calc-keypad .calc-btn {
    padding: 15px 12px;
    font-size: 16px;
    min-height: 50px;
  }
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 25px 0;
}

.ai-tool-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.ai-tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
}

.ai-tool-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(14, 165, 233, 0.3);
}

.tool-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.tool-header h4 {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.pricing-badge {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success-500);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 500;
  border: 1px solid rgba(16, 185, 129, 0.3);
  white-space: nowrap;
}

.ai-tool-card .tool-description {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 15px;
}

.ai-tool-card .tool-features {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 15px;
}

.ai-tool-card .feature-tag {
  background: rgba(217, 70, 239, 0.2);
  color: var(--accent-300);
  padding: 3px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 500;
  border: 1px solid rgba(217, 70, 239, 0.3);
}

.ai-tool-card .tool-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-400);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all var(--transition-normal);
  padding: 8px 12px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: var(--radius-md);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.ai-tool-card .tool-link:hover {
  color: var(--primary-300);
  background: rgba(14, 165, 233, 0.2);
  transform: translateX(2px);
}

.ai-tools-note {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-top: 25px;
}

.ai-tools-note h4 {
  color: var(--primary-400);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-tools-note p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

/* AdSense Placeholders */
.adsense-section {
  padding: 40px 0;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ad-placeholder {
  text-align: center;
  max-width: 100%;
  margin: 0 auto;
}

.ad-label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
  opacity: 0.7;
}

.ad-content {
  display: flex;
  justify-content: center;
  align-items: center;
}

.ad-banner {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  min-width: 728px;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-normal);
}

.ad-banner:hover {
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(14, 165, 233, 0.05);
}

.ad-banner span {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 5px;
}

.ad-banner small {
  font-size: 12px;
  opacity: 0.7;
}

/* Language Switcher */
.language-switcher {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  margin-right: 10px;
}

.language-switcher:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.language-switcher:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
}

.language-switcher option {
  background: var(--bg-dark);
  color: var(--text-primary);
  padding: 8px;
}

/* RTL Support - Fixed Layout Issues */
[dir="rtl"] .nav-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .language-switcher {
  margin-right: 0;
  margin-left: 10px;
}

[dir="rtl"] .search-container {
  margin-left: 10px;
  margin-right: 0;
}

[dir="rtl"] .nav-menu {
  flex-direction: row-reverse;
}

[dir="rtl"] .hero-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .btn-icon {
  margin-left: 0;
  margin-right: 8px;
  transform: scaleX(-1);
}

/* Fix for upside down content */
[dir="rtl"] .hero-container {
  flex-direction: row-reverse;
}

[dir="rtl"] .hero-content {
  text-align: right;
}

[dir="rtl"] .hero-visual {
  order: -1;
}

/* Fix card sizes - Make them bigger and properly spaced */
.category-card,
.tool-card,
.feature-item {
  min-height: 320px;
  min-width: 380px;
  padding: 35px;
  margin: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before,
.tool-card::before,
.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  border-radius: 20px 20px 0 0;
}

.category-card:hover,
.tool-card:hover,
.feature-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.2);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 40px;
  margin: 40px 0;
  padding: 20px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 40px;
  margin: 40px 0;
  padding: 20px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 35px;
  margin: 40px 0;
  padding: 20px;
}

@media (max-width: 768px) {
  .category-card,
  .tool-card,
  .feature-item {
    min-height: 250px;
    min-width: 300px;
    padding: 25px;
    margin: 10px;
  }
  
  .categories-grid,
  .tools-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .category-card,
  .tool-card,
  .feature-item {
    min-height: 220px;
    min-width: 280px;
    padding: 20px;
    margin: 8px;
  }
  
  .categories-grid,
  .tools-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
}

/* Responsive AdSense */
@media (max-width: 768px) {
  .ad-banner {
    min-width: 320px;
    min-height: 50px;
    padding: 20px 10px;
  }
  
  .ad-banner span {
    font-size: 14px;
  }
  
  .ad-banner small {
    font-size: 10px;
  }
  
  .language-switcher {
    font-size: 12px;
    padding: 6px 8px;
  }
}

@media (max-width: 480px) {
  .ad-banner {
    min-width: 300px;
    min-height: 50px;
    padding: 15px 8px;
  }
}

.tool-features-list li {
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  padding-left: 20px;
}

.tool-features-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-500);
  font-weight: bold;
}

.tool-instructions p {
  color: var(--text-secondary);
  line-height: 1.6;
  background: rgba(255, 255, 255, 0.05);
  padding: 15px;
  border-radius: 10px;
  border-left: 3px solid var(--primary-500);
}

/* Animation for modals */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive modals */
@media (max-width: 768px) {
  .modal-content {
    margin: 20px;
    max-width: calc(100% - 40px);
  }
  
  .tool-info-modal {
    width: 100%;
  }
  
  .modal-body {
    padding: 20px;
  }
  
  .modal-footer {
    flex-direction: column;
  }
  
  .modal-footer .btn {
    width: 100%;
  }
}

/* Animation for demo container */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.feature-item {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
}

.feature-item:hover {
  transform: translateY(-4px);
  border-color: var(--primary-400);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
}

.feature-item h3 {
  margin-bottom: var(--space-md);
  color: var(--neutral-50);
}

.feature-item p {
  color: var(--neutral-300);
}

/* Newsletter Section */
.newsletter-section {
  background: linear-gradient(135deg, var(--primary-900), var(--accent-900));
  text-align: center;
  padding: var(--space-4xl) 0;
}

.newsletter-content h2 {
  margin-bottom: var(--space-lg);
  color: white;
}

.newsletter-content p {
  margin-bottom: var(--space-2xl);
  color: var(--primary-100);
  font-size: 1.25rem;
}

.newsletter-form {
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  gap: var(--space-md);
}

.form-group input {
  flex: 1;
  padding: var(--space-md);
  border: none;
  border-radius: var(--radius-full);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  backdrop-filter: blur(10px);
}

.form-group input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.2);
}

/* Footer */
.footer {
  position: relative;
  background: linear-gradient(135deg, var(--neutral-900) 0%, #0a0a0a 100%);
  border-top: 1px solid var(--glass-border);
  margin-top: var(--space-4xl);
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-400), transparent);
  opacity: 0.5;
}

.footer-main {
  padding: 4rem 0 2rem;
  position: relative;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, white, var(--neutral-200));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-section h4 {
  color: var(--neutral-200);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-section h4::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 2rem;
  height: 2px;
  background: var(--primary-400);
  border-radius: 1px;
}

.footer-section p {
  color: var(--neutral-400);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section ul li a {
  color: var(--neutral-400);
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  padding: 0.25rem 0;
  border-radius: 4px;
  position: relative;
}

.footer-section ul li a::before {
  content: '';
  position: absolute;
  left: -0.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 1px;
  background: var(--primary-400);
  transition: width 0.3s ease;
}

.footer-section ul li a:hover {
  color: var(--primary-400);
  transform: translateX(0.5rem);
}

.footer-section ul li a:hover::before {
  width: 0.25rem;
}

/* Company Info Section */
.footer-company {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.5));
}

.footer-brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-company-description {
  color: var(--neutral-400);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* Social Media Links */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--neutral-400);
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-link:hover {
  background: var(--primary-400);
  border-color: var(--primary-400);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

/* Newsletter Section */
.footer-newsletter {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.5rem;
  backdrop-filter: blur(20px);
}

.newsletter-title {
  color: white;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.newsletter-description {
  color: var(--neutral-400);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.newsletter-input {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 0.75rem;
  color: white;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--primary-400);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.newsletter-input::placeholder {
  color: var(--neutral-500);
}

.newsletter-btn {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border: none;
  border-radius: 8px;
  padding: 0.75rem;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.newsletter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.newsletter-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.newsletter-btn:hover::before {
  left: 100%;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--neutral-400);
  font-size: 0.9rem;
}

.contact-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  font-size: 0.75rem;
}

/* Stats Section */
.footer-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-400);
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--neutral-400);
  font-size: 0.9rem;
}

/* Footer Bottom */
.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  color: var(--neutral-500);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--neutral-500);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--primary-400);
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: var(--space-lg) 0;
  text-align: center;
  color: var(--neutral-500);
}

/* Loading Screen */
.loading-screen {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-gradient);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-content {
  text-align: center;
  color: var(--text-primary);
}

.loading-logo {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  animation: pulse 2s infinite;
}

.loading-text {
  font-size: 1.5rem;
  color: var(--primary-400);
  margin-bottom: var(--space-xl);
}

.loading-bar {
  width: 300px;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin: 0 auto;
}

.loading-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  width: 0%;
  animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0%; }
  50% { width: 100%; }
  100% { width: 0%; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

/* Notification System */
.notification-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: var(--z-tooltip);
}

.notification {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.notification.show {
  transform: translateX(0);
}

/* Animations */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container { padding: 0 var(--space-md); }
  .hero { padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl); }
  .section { padding: var(--space-3xl) 0; }
  .hero-container { grid-template-columns: 1fr; gap: var(--space-3xl); }
  .demo-container { grid-template-columns: 1fr; gap: var(--space-3xl); }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .mobile-menu-btn { display: flex; }
  .search-input { width: 180px; }
  .tools-grid { 
    grid-template-columns: 1fr; 
    gap: var(--space-lg);
  }
  .features-grid { 
    grid-template-columns: 1fr; 
    gap: var(--space-lg);
  }
  /* Footer Responsive */
  .footer-content { 
    grid-template-columns: 1fr; 
    gap: 2rem; 
  }
  
  .footer-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .footer-links {
    justify-content: center;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .social-links {
    justify-content: center;
  }
  .hero-actions { 
    flex-direction: column; 
    align-items: center;
  }
  .form-group { flex-direction: column; }
  
  .calc-keypad {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
    padding: var(--space-md);
  }
  
  .calc-btn {
    padding: var(--space-md);
    font-size: 1rem;
    min-height: 50px;
  }
  
  .tool-card {
    padding: var(--space-xl);
  }
  
  .tool-title {
    font-size: 1.3rem;
  }
  
  .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.9rem;
    min-height: 44px;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .hero { padding: calc(80px + var(--space-2xl)) 0 var(--space-2xl); }
  .section { padding: var(--space-2xl) 0; }
  .search-input { width: 140px; }
  .btn { 
    padding: var(--space-sm) var(--space-md); 
    font-size: 0.875rem; 
    min-height: 40px;
  }
  .floating-card { display: none; }
  
  .calc-keypad {
    gap: var(--space-xs);
    padding: var(--space-sm);
  }
  
  .calc-btn {
    padding: var(--space-sm);
    font-size: 0.9rem;
    min-height: 45px;
  }
  
  .tool-card {
    padding: var(--space-lg);
  }
  
  .tool-title {
    font-size: 1.2rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-description {
    font-size: 1.1rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }
.mt-6 { margin-top: var(--space-2xl); }
.mt-7 { margin-top: var(--space-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }
.mb-6 { margin-bottom: var(--space-2xl); }
.mb-7 { margin-bottom: var(--space-3xl); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.transition { transition: all var(--transition-normal); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-800);
}

::-webkit-scrollbar-thumb {
  background: var(--neutral-600);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-500);
}

/* Focus States */
*:focus {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: var(--primary-400);
  color: white;
}

::-moz-selection {
  background: var(--primary-400);
  color: white;
}

/* AI Tool Modal Styles */
.ai-tool-modal {
  width: 600px;
  max-width: 90vw;
}

.ai-input-section {
  margin-bottom: 25px;
}

.ai-input-section label {
  display: block;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 14px;
}

.ai-input-section textarea,
.ai-input-section input[type="file"],
.ai-input-section select {
  width: 100%;
  background: var(--bg-dark);
  border: 2px solid var(--primary-500);
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 15px;
  transition: all 0.3s ease;
}

.ai-input-section textarea:focus,
.ai-input-section select:focus {
  outline: none;
  border-color: var(--accent-500);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.ai-input-section textarea::placeholder {
  color: var(--text-secondary);
}

.ai-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.ai-options label {
  margin-bottom: 5px;
}

.ai-output-section {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 20px;
  border-left: 3px solid var(--accent-500);
}

.ai-output-section h4 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 18px;
}

.generated-content {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  line-height: 1.6;
}

.generated-content p {
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.generated-content strong {
  color: var(--text-primary);
}

.processed-image {
  text-align: center;
}

.analysis-results {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
}

.analysis-results ul {
  list-style: none;
  padding: 0;
}

.analysis-results li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.analysis-results li:last-child {
  border-bottom: none;
}

.analysis-results strong {
  color: var(--text-primary);
}

/* Notification Styles */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 15px 20px;
  color: var(--text-primary);
  backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow);
  z-index: 10000;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  max-width: 300px;
}

.notification.show {
  transform: translateX(0);
}

.notification button {
  background: none;
  border: none;
  color: var(--text-secondary);
  margin-left: 15px;
  cursor: pointer;
  font-size: 18px;
  float: right;
}

.notification button:hover {
  color: var(--text-primary);
}

.notification-success {
  border-left: 4px solid var(--success-500);
}

.notification-warning {
  border-left: 4px solid var(--warning-500);
}

.notification-error {
  border-left: 4px solid var(--error-500);
}

/* Calculator Modal Styles */
.calculator-modal {
  width: 500px;
  max-width: 90vw;
}

.calc-display {
  background: var(--bg-dark);
  border: 2px solid var(--primary-500);
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 20px;
  font-size: 32px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  text-align: right;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.calc-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 400px;
  margin: 0 auto;
}

.calc-buttons.scientific {
  grid-template-columns: repeat(4, 1fr);
  max-width: 500px;
}

.calc-buttons button {
  background: var(--primary-600);
  border: none;
  border-radius: 10px;
  padding: 15px;
  font-size: 18px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.calc-buttons button:hover {
  background: var(--primary-500);
  transform: scale(1.05);
}

.calc-buttons button:active {
  transform: scale(0.95);
}

/* Financial Calculator Styles */
.financial-inputs,
.health-inputs,
.unit-inputs,
.time-inputs {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.input-group {
  display: flex;
  flex-direction: column;
}

.input-group label {
  color: var(--text-primary);
  margin-bottom: 5px;
  font-weight: 600;
  font-size: 14px;
}

.input-group input,
.input-group select {
  background: var(--bg-dark);
  border: 2px solid var(--primary-500);
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--accent-500);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.financial-result,
.health-result,
.unit-result,
.math-result,
.time-result {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 20px;
  border-left: 3px solid var(--accent-500);
  margin-top: 20px;
}

.financial-result h4,
.health-result h4,
.unit-result h4,
.math-result h4 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 18px;
}

.financial-result p,
.health-result p,
.unit-result p,
.math-result p {
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.6;
}

.financial-result strong,
.health-result strong,
.unit-result strong,
.math-result strong {
  color: var(--text-primary);
}

/* Health Calculator Styles */
.health-inputs {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* Unit Converter Styles */
.unit-inputs {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* Math Tools Styles */
.math-tools {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.math-tools button {
  background: var(--primary-600);
  border: none;
  border-radius: 10px;
  padding: 15px;
  font-size: 16px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.math-tools button:hover {
  background: var(--primary-500);
  transform: scale(1.05);
}

.math-tools button:active {
  transform: scale(0.95);
}



.math-result ul {
  list-style: none;
  padding: 0;
}

.math-result li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.math-result li:last-child {
  border-bottom: none;
}

/* Responsive Calculator Modals */
@media (max-width: 768px) {
  .calculator-modal {
    width: 95vw;
    margin: 10px;
  }
  
  .calc-buttons {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  
  .calc-buttons button {
    padding: 12px;
    font-size: 16px;
  }
  
  .calc-display {
    font-size: 24px;
    padding: 15px;
  }
}

/* Responsive Button Adjustments */
@media (max-width: 768px) {
  .btn {
    padding: 10px 20px;
    font-size: 13px;
    min-height: 40px;
  }
  
  .tool-actions {
    flex-direction: column;
  }
  
  .tool-actions .btn {
    width: 100%;
    margin: 5px 0;
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn-group .btn {
    width: 100%;
  }
}

/* Responsive AI Tool Modals */
@media (max-width: 768px) {
  .ai-tool-modal {
    width: 95vw;
    margin: 10px;
  }
  
  .ai-options {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .ai-input-section textarea {
    min-height: 120px;
  }
}

/* Resources Page Styles */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.resource-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.resource-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.resource-card:hover::before {
  transform: scaleX(1);
}

.resource-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.resource-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
  color: white;
  transition: all 0.3s ease;
}

.resource-card:hover .resource-icon {
  transform: scale(1.1);
}

.resource-content h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 24px;
  font-weight: 600;
}

.resource-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.resource-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 25px;
}

.tag {
  background: rgba(14, 165, 233, 0.15);
  color: var(--primary-300);
  padding: 6px 12px;
  border-radius: 15px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(14, 165, 233, 0.2);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.tag:hover {
  background: rgba(14, 165, 233, 0.25);
  border-color: rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

/* Featured Section */
.featured-section {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(217, 70, 239, 0.1));
  border-radius: 20px;
  margin: 50px 0;
  padding: 50px 0;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.featured-item {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  display: flex;
  gap: 20px;
  align-items: center;
}

.featured-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  border-color: rgba(14, 165, 233, 0.3);
}

.featured-image {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: white;
  flex-shrink: 0;
}

.featured-content {
  flex: 1;
}

.featured-content h3 {
  color: var(--text-primary);
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 600;
}

.featured-content p {
  color: var(--text-secondary);
  margin-bottom: 15px;
  line-height: 1.5;
}

.featured-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.meta-item {
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.meta-item i {
  color: var(--primary-400);
}

/* Newsletter Section Enhancement */
.newsletter-section {
  background: linear-gradient(135deg, var(--primary-900), var(--accent-900));
  text-align: center;
  padding: 80px 0;
  border-radius: 20px;
  margin: 50px 0;
}

.newsletter-content h2 {
  margin-bottom: 20px;
  color: white;
  font-size: 36px;
}

.newsletter-content p {
  margin-bottom: 40px;
  color: var(--primary-100);
  font-size: 18px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.newsletter-form {
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  gap: 15px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50px;
  padding: 5px;
  backdrop-filter: blur(10px);
}

.form-group input {
  flex: 1;
  padding: 15px 25px;
  border: none;
  border-radius: 50px;
  font-size: 16px;
  background: transparent;
  color: white;
  outline: none;
}

.form-group input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus {
  background: rgba(255, 255, 255, 0.1);
}

.form-group .btn {
  border-radius: 50px;
  padding: 15px 30px;
  font-weight: 600;
  white-space: nowrap;
}

/* Responsive Design for Resources */
@media (max-width: 768px) {
  .resources-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .resource-card {
    padding: 25px;
  }
  
  .featured-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .featured-item {
    flex-direction: column;
    text-align: center;
    padding: 25px;
  }
  
  .featured-meta {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .form-group {
    flex-direction: column;
    background: transparent;
    padding: 0;
  }
  
  .form-group input,
  .form-group .btn {
    border-radius: 15px;
  }
}

/* Calculator Page Specific Styles */
.calculator-categories-section {
  padding: 80px 0;
  background: var(--bg-gradient);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.category-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.category-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
  color: white;
  transition: all 0.3s ease;
}

.category-card:hover .category-icon {
  transform: scale(1.1);
}

.category-card h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 24px;
  font-weight: 600;
}

.category-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.category-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 25px;
}

.category-features .feature {
  background: rgba(14, 165, 233, 0.15);
  color: var(--primary-300);
  padding: 6px 12px;
  border-radius: 15px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(14, 165, 233, 0.2);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.category-features .feature:hover {
  background: rgba(14, 165, 233, 0.25);
  border-color: rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

/* Calculator Preview in Hero */
.calculator-preview {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(20px);
  max-width: 300px;
  margin: 0 auto;
}

.calc-display {
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid var(--primary-500);
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 20px;
  text-align: right;
}

.calc-expression {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 5px;
}

.calc-result {
  color: var(--text-primary);
  font-size: 24px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

.calc-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.calc-row {
  display: contents;
}

.calc-btn {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  border: 1px solid var(--primary-500);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all var(--transition-normal);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  font-family: var(--font-sans);
}

.calc-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.calc-btn:hover::before {
  opacity: 1;
}

.calc-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-300);
}

.calc-btn:active {
  transform: translateY(0);
}

.calc-btn.operator {
  background: linear-gradient(135deg, var(--accent-600), var(--accent-700));
  border-color: var(--accent-500);
}

.calc-btn.operator::before {
  background: linear-gradient(135deg, var(--accent-400), var(--accent-500));
}

.calc-btn.equals {
  background: linear-gradient(135deg, var(--success-500), var(--success-600));
  border-color: var(--success-400);
  grid-column: span 2;
}

.calc-btn.equals::before {
  background: linear-gradient(135deg, var(--success-400), var(--success-500));
}

.calc-btn.function {
  background: linear-gradient(135deg, var(--neutral-600), var(--neutral-700));
  border-color: var(--neutral-500);
  font-size: 0.9rem;
}

.calc-btn.function::before {
  background: linear-gradient(135deg, var(--neutral-500), var(--neutral-600));
}

.calc-btn.clear {
  background: linear-gradient(135deg, var(--error-500), var(--error-600));
  border-color: var(--error-400);
}

.calc-btn.clear::before {
  background: linear-gradient(135deg, var(--error-400), var(--error-500));
}

.calc-btn.backspace {
  background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
  border-color: var(--warning-400);
}

.calc-btn.backspace::before {
  background: linear-gradient(135deg, var(--warning-400), var(--warning-500));
}

.calc-btn.number {
  background: linear-gradient(135deg, var(--neutral-700), var(--neutral-800));
  border-color: var(--neutral-600);
}

.calc-btn.number::before {
  background: linear-gradient(135deg, var(--neutral-600), var(--neutral-700));
}

/* Quick Calculators Section */
.quick-calculators-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(217, 70, 239, 0.05));
}

.quick-calculators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.quick-calc-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 15px;
  padding: 25px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
}

.quick-calc-item:hover {
  transform: translateY(-3px);
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.quick-calc-item h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 20px;
  font-weight: 600;
}

.quick-calc-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.quick-calc-form .form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quick-calc-form .form-group label {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 14px;
}

.quick-calc-form .form-group input,
.quick-calc-form .form-group select {
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  color: var(--text-primary);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.quick-calc-form .form-group input:focus,
.quick-calc-form .form-group select:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
  background: rgba(0, 0, 0, 0.4);
}

.quick-calc-form .form-group input:hover,
.quick-calc-form .form-group select:hover {
  border-color: var(--primary-300);
  background: rgba(0, 0, 0, 0.35);
}

.quick-calc-form .form-group input:focus,
.quick-calc-form .form-group select:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.3);
}

.quick-calc-form .form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: flex;
  gap: 15px;
  align-items: center;
}

.form-row label {
  color: var(--text-primary);
  font-weight: 500;
  min-width: 80px;
}

.form-row input,
.form-row select {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(14, 165, 233, 0.3);
  border-radius: 10px;
  padding: 10px 15px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.3);
}

.quick-calc-result {
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 10px;
  padding: 15px;
  margin-top: 15px;
  text-align: center;
  display: none;
}

.quick-calc-result.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.result-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-400);
  margin-bottom: 5px;
}

.result-label {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Quick Calculator Result Display */
.calc-result-display {
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 10px;
  padding: 15px;
  margin-top: 15px;
  text-align: center;
  display: none;
}

.calc-result-display.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.calc-result-display .result-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-400);
  margin-bottom: 8px;
}

.calc-result-display .result-label {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 8px;
}

.calc-result-display .result-category {
  color: var(--accent-400);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  padding: 4px 12px;
  background: rgba(217, 70, 239, 0.1);
  border-radius: 15px;
  display: inline-block;
}

.calc-result-display .result-details {
  text-align: left;
  margin-top: 12px;
}

.calc-result-display .result-details p {
  margin: 5px 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.calc-result-display .result-details strong {
  color: var(--text-primary);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Notification System */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--primary-600);
  color: white;
  padding: 15px 20px;
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  max-width: 300px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.notification.show {
  transform: translateX(0);
}

/* Modal System */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  transition-delay: 0s;
}

.modal {
  background: var(--neutral-800);
  border: 1px solid var(--neutral-600);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xl);
  border-bottom: 1px solid var(--neutral-600);
}

.modal-header h3 {
  color: var(--text-primary);
  margin: 0;
  font-size: 1.3rem;
  font-weight: 600;
}

.modal-body {
  padding: var(--space-xl);
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1 1 auto;
  overflow-y: auto;
}

.modal-body ol {
  padding-left: var(--space-lg);
}

.modal-body li {
  margin-bottom: var(--space-sm);
}

.modal-footer {
  padding: var(--space-xl);
  border-top: 1px solid var(--neutral-600);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
}

/* Queue Items */
.queue-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-sm);
}

.queue-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.queue-url {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

.queue-format {
  color: var(--primary-300);
  font-size: 0.8rem;
  background: rgba(14, 165, 233, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.queue-status {
  color: var(--success-400);
  font-size: 0.9rem;
  font-weight: 500;
}

.notification.notification-warning {
  background: var(--warning-500);
}

.notification.notification-error {
  background: var(--error-500);
}

.notification.notification-success {
  background: var(--success-500);
}

.notification button {
  background: none;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
}

.notification button:hover {
  opacity: 0.8;
}

/* Responsive Calculator Design */
@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .category-card {
    padding: 25px;
  }
  
  .quick-calculators-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .form-row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .form-row label {
    min-width: auto;
    margin-bottom: 5px;
  }
  
  .calculator-preview {
    max-width: 100%;
    padding: 20px;
  }
  
  .calc-buttons {
    gap: 6px;
  }
  
  .calc-btn {
    padding: 10px;
    font-size: 14px;
  }
}

/* Download Instructions Section */
.download-instructions-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(217, 70, 239, 0.05), rgba(14, 165, 233, 0.05));
}

.instructions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.instruction-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.instruction-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-400), var(--primary-400));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.instruction-card:hover::before {
  transform: scaleX(1);
}

.instruction-card:hover {
  transform: translateY(-5px);
  border-color: rgba(217, 70, 239, 0.3);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-2xl);
}

.instruction-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.instruction-icon {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--accent-500), var(--primary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.instruction-header h3 {
  color: var(--text-primary);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0;
}

.instruction-content h4 {
  color: var(--primary-300);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.instruction-content ol,
.instruction-content ul {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  padding-left: var(--space-lg);
}

.instruction-content li {
  margin-bottom: var(--space-sm);
}

.instruction-note {
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  color: var(--primary-200);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* How It Works Section */
.how-it-works-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(217, 70, 239, 0.05));
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.step-item {
  text-align: center;
  padding: 30px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  transition: all 0.3s ease;
}

.step-item:hover {
  transform: translateY(-5px);
  border-color: rgba(14, 165, 233, 0.3);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.step-number {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.step-item h3 {
  color: var(--text-primary);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 15px;
}

.step-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Responsive Design for Instructions */
@media (max-width: 768px) {
  .instructions-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .instruction-card {
    padding: var(--space-xl);
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .step-item {
    padding: var(--space-xl) var(--space-lg);
  }

  .modal {
    width: 95%;
    margin: var(--space-md);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .instruction-card {
    padding: var(--space-lg);
  }
  
  .instruction-header h3 {
    font-size: 1.2rem;
  }
  
  .step-item {
    padding: var(--space-lg) var(--space-md);
  }
  
  .step-number {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
  
  .step-icon {
    font-size: 2.5rem;
  }

  .modal {
    width: 98%;
    margin: var(--space-sm);
  }

  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--space-md);
  }

  .modal-header h3 {
    font-size: 1.1rem;
  }
}

/* Enhanced Visual Effects */
.floating-shapes .shape {
  animation: float 6s ease-in-out infinite;
}

.floating-shapes .shape:nth-child(2) {
  animation-delay: -2s;
}

.floating-shapes .shape:nth-child(3) {
  animation-delay: -4s;
}

.floating-shapes .shape:nth-child(4) {
  animation-delay: -1s;
}

.floating-shapes .shape:nth-child(5) {
  animation-delay: -3s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

/* Enhanced Card Hover Effects */
.tool-card:hover .tool-icon {
  transform: scale(1.1) rotate(5deg);
}

.tool-card .tool-icon {
  transition: all var(--transition-normal);
}

/* Enhanced Button States */
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn:disabled:hover {
  transform: none !important;
  box-shadow: var(--shadow-md);
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Lightweight skeleton loader for generated content */
.skeleton-line {
  position: relative;
  height: 12px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}

.skeleton-line + .skeleton-line { margin-top: 10px; }

.skeleton-line::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  animation: skeletonShimmer 1.2s infinite;
}

@keyframes skeletonShimmer {
  100% { transform: translateX(100%); }
}


/* =============================
   Pro Error Pages
   ============================= */
.error-page {
  position: relative;
  padding: calc(80px + var(--space-4xl)) 0 var(--space-4xl);
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
}

.error-card {
  margin: 0 auto;
  max-width: 920px;
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  padding: clamp(24px, 5vw, 48px);
  backdrop-filter: blur(20px);
  box-shadow: 0 30px 60px rgba(0,0,0,0.35);
  text-align: center;
  overflow: hidden;
}

.error-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
}

.error-icon-ring {
  width: 96px;
  height: 96px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  position: relative;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 50% 50%, rgba(56,189,248,0.2), rgba(217,70,239,0.15));
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: 0 10px 30px rgba(56,189,248,0.25);
}

.error-icon-ring::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(56,189,248,0.25), rgba(217,70,239,0.25), rgba(56,189,248,0.25));
  filter: blur(8px);
  animation: spinSlow 6s linear infinite;
  z-index: -1;
}

.error-icon-ring span { font-size: 2rem; }

@keyframes spinSlow { to { transform: rotate(360deg); } }

.error-code {
  font-family: var(--font-mono);
  font-weight: 900;
  letter-spacing: 2px;
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 1;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  color: var(--neutral-50);
  margin-bottom: var(--space-sm);
}

.error-message {
  color: var(--neutral-300);
  margin: 0 auto var(--space-xl);
  max-width: 720px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.error-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.error-suggestions .chip {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--neutral-300);
  padding: 8px 12px;
  border-radius: 9999px;
  font-size: 12px;
}

.error-search {
  margin: var(--space-md) auto var(--space-lg);
  max-width: 680px;
  display: flex;
  gap: 10px;
}

.error-search-input {
  flex: 1;
  padding: 14px 18px;
  border-radius: var(--radius-full);
  border: 2px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--neutral-100);
  transition: all var(--transition-normal);
}

.error-search-input::placeholder { color: var(--neutral-400); }

.error-search-input:focus {
  outline: none;
  border-color: var(--primary-400);
  background: rgba(255,255,255,0.15);
  box-shadow: 0 0 0 4px rgba(14,165,233,0.1);
}

.error-note {
  margin-top: var(--space-md);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  color: var(--neutral-300);
  border-radius: 12px;
  padding: 14px 16px;
}

@media (max-width: 768px) {
  .error-card { padding: 24px; }
  .error-actions .btn { width: 100%; }
  .error-search { flex-direction: column; }
}