/* ============================================================
   TrustVault — Premium Design System
   Dark Mode | Glassmorphism | Blockchain Aesthetics
   ============================================================ */

/* === Google Fonts === */
@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');

/* === Design Tokens === */
:root {
  /* Colors */
  --bg-deep: #030712;
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(17, 24, 39, 0.4);
  --border-glass: rgba(0, 212, 170, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.06);

  --accent-primary: #00d4aa;
  --accent-secondary: #00b4d8;
  --accent-gradient: linear-gradient(135deg, #00d4aa, #00b4d8);
  --accent-glow: rgba(0, 212, 170, 0.3);
  --accent-warn: #f59e0b;
  --accent-error: #ef4444;
  --accent-success: #10b981;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #00d4aa;

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 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;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(0, 212, 170, 0.15);
  --shadow-glow-strong: 0 0 60px rgba(0, 212, 170, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-secondary); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: inherit; outline: none; }

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: var(--radius-full); }

/* === Background Effects === */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 212, 170, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 170, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.bg-gradient-orb {
  position: fixed; border-radius: 50%; filter: blur(120px); pointer-events: none; z-index: 0;
}
.bg-gradient-orb.orb-1 {
  width: 600px; height: 600px; top: -200px; right: -200px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.08), transparent 70%);
}
.bg-gradient-orb.orb-2 {
  width: 500px; height: 500px; bottom: -150px; left: -150px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.06), transparent 70%);
}

/* === Layout === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }
.section { padding: var(--space-4xl) 0; position: relative; z-index: 1; }

/* === Navigation === */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: var(--space-md) 0;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-base);
}
.navbar.scrolled { background: rgba(3, 7, 18, 0.95); box-shadow: var(--shadow-lg); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: var(--space-sm); font-weight: 800; font-size: 1.25rem; }
.nav-brand svg { width: 32px; height: 32px; }
.nav-brand span { background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; align-items: center; gap: var(--space-xl); list-style: none; }
.nav-links a { color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; letter-spacing: 0.02em; transition: color var(--transition-fast); }
.nav-links a:hover { color: var(--text-primary); }

/* === Buttons === */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: 0.75rem 1.5rem; border-radius: var(--radius-md);
  font-weight: 600; font-size: 0.9rem; letter-spacing: 0.02em;
  transition: all var(--transition-base); position: relative; overflow: hidden;
}
.btn-primary {
  background: var(--accent-gradient); color: #030712;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-glow-strong);
}
.btn-secondary {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-glass);
}
.btn-secondary:hover {
  background: var(--bg-glass); border-color: var(--accent-primary);
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* === Hero Section === */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: var(--space-4xl) 0;
}
.hero-content { max-width: 800px; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: 0.4rem 1rem; border-radius: var(--radius-full);
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  font-size: 0.8rem; color: var(--accent-primary); font-weight: 500;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease both;
}
.hero-badge .pulse { width: 8px; height: 8px; background: var(--accent-primary); border-radius: 50%; animation: pulse 2s infinite; }
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900; line-height: 1.1;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.6s ease 0.1s both;
}
.hero h1 .gradient {
  background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero .subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); max-width: 600px; margin: 0 auto var(--space-2xl);
  animation: fadeInUp 0.6s ease 0.2s both;
}
.hero-actions {
  display: flex; gap: var(--space-md); justify-content: center; flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}
.hero-stats {
  display: flex; justify-content: center; gap: var(--space-3xl); margin-top: var(--space-3xl);
  animation: fadeInUp 0.6s ease 0.4s both;
}
.hero-stat { text-align: center; }
.hero-stat .number {
  font-size: 2rem; font-weight: 800;
  background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-stat .label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* === Canvas Hero Background === */
#hero-canvas {
  position: absolute; inset: 0; z-index: 0; opacity: 0.4;
}

/* === Feature Cards === */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}
.feature-card {
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); padding: var(--space-2xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,212,170,0.05) 0%, transparent 50%);
  opacity: 0; transition: opacity var(--transition-base);
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(0,212,170,0.3); box-shadow: var(--shadow-glow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: var(--accent-gradient); display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-lg); font-size: 1.5rem; color: #030712;
}
.feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: var(--space-sm); }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* === Section Headers === */
.section-header { text-align: center; max-width: 700px; margin: 0 auto var(--space-3xl); }
.section-header .overline {
  display: inline-block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.15em; color: var(--accent-primary); margin-bottom: var(--space-sm);
}
.section-header h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; margin-bottom: var(--space-md); }
.section-header p { color: var(--text-secondary); font-size: 1.1rem; }

/* === How It Works === */
.steps-container { display: flex; flex-direction: column; gap: var(--space-xl); max-width: 800px; margin: 0 auto; }
.step {
  display: flex; gap: var(--space-xl); align-items: flex-start;
  padding: var(--space-xl);
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}
.step:hover { border-color: rgba(0,212,170,0.3); transform: translateX(8px); }
.step-number {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 50%;
  background: var(--accent-gradient); display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.25rem; color: #030712;
}
.step h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.25rem; }
.step p { color: var(--text-secondary); font-size: 0.9rem; }
.step .step-badge {
  display: inline-block; padding: 0.15rem 0.6rem; border-radius: var(--radius-full);
  background: rgba(0,212,170,0.1); color: var(--accent-primary);
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase; margin-top: 0.5rem;
}

/* === Pricing === */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-lg); align-items: start; }
.pricing-card {
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl); padding: var(--space-2xl);
  backdrop-filter: blur(10px); transition: all var(--transition-base);
  position: relative;
}
.pricing-card.featured {
  border-color: var(--accent-primary); box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}
.pricing-card.featured::after {
  content: 'MOST POPULAR'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  padding: 0.25rem 1rem; border-radius: var(--radius-full);
  background: var(--accent-gradient); color: #030712;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-card.featured:hover { transform: scale(1.03) translateY(-4px); }
.pricing-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: var(--space-xs); }
.pricing-card .price { font-size: 2.5rem; font-weight: 900; margin: var(--space-md) 0; }
.pricing-card .price span { font-size: 0.9rem; font-weight: 400; color: var(--text-muted); }
.pricing-card .price-note { font-size: 0.8rem; color: var(--text-muted); margin-bottom: var(--space-lg); }
.pricing-card ul { list-style: none; margin-bottom: var(--space-xl); }
.pricing-card li {
  padding: 0.5rem 0; font-size: 0.9rem; color: var(--text-secondary);
  display: flex; align-items: center; gap: var(--space-sm);
}
.pricing-card li::before { content: '✓'; color: var(--accent-primary); font-weight: 700; }

/* === Live Demo Section === */
.demo-area {
  max-width: 700px; margin: 0 auto;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl); padding: var(--space-2xl);
  backdrop-filter: blur(10px);
}
.drop-zone {
  border: 2px dashed var(--border-glass); border-radius: var(--radius-lg);
  padding: var(--space-3xl); text-align: center; cursor: pointer;
  transition: all var(--transition-base);
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-primary); background: rgba(0,212,170,0.05);
}
.drop-zone .icon { font-size: 3rem; margin-bottom: var(--space-md); }
.drop-zone h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: var(--space-xs); }
.drop-zone p { color: var(--text-muted); font-size: 0.85rem; }

/* === Progress Bar === */
.progress-container { margin: var(--space-lg) 0; }
.progress-bar {
  width: 100%; height: 6px; background: var(--bg-secondary);
  border-radius: var(--radius-full); overflow: hidden;
}
.progress-fill {
  height: 100%; background: var(--accent-gradient); border-radius: var(--radius-full);
  transition: width 0.3s ease; width: 0%;
}
.progress-label { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* === Hash Display === */
.hash-display {
  background: var(--bg-secondary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: var(--space-md);
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-primary);
  word-break: break-all; margin: var(--space-md) 0;
}

/* === Result Card === */
.result-card {
  text-align: center; padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  animation: scaleIn 0.4s var(--transition-spring) both;
}
.result-card.success { background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.3); }
.result-card.error { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.3); }
.result-icon { font-size: 4rem; margin-bottom: var(--space-md); }

/* === Forms === */
.form-group { margin-bottom: var(--space-lg); }
.form-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); margin-bottom: var(--space-xs); }
.form-input {
  width: 100%; padding: 0.75rem 1rem;
  background: var(--bg-secondary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); color: var(--text-primary);
  font-size: 0.95rem; transition: all var(--transition-fast);
}
.form-input:focus { border-color: var(--accent-primary); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-input::placeholder { color: var(--text-muted); }

/* === Modal === */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(8px);
  display: none; align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease both;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl); padding: var(--space-2xl);
  max-width: 500px; width: 90%; max-height: 90vh; overflow-y: auto;
  animation: scaleIn 0.3s ease both;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-xl); }
.modal-header h2 { font-size: 1.25rem; font-weight: 700; }
.modal-close { background: none; color: var(--text-muted); font-size: 1.5rem; padding: 0.25rem; }
.modal-close:hover { color: var(--text-primary); }

/* === Footer === */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  position: relative; z-index: 1;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-2xl); margin-bottom: var(--space-2xl); }
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; margin-top: var(--space-sm); max-width: 300px; }
.footer h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-secondary); margin-bottom: var(--space-md); }
.footer ul { list-style: none; }
.footer li { margin-bottom: var(--space-sm); }
.footer li a { color: var(--text-muted); font-size: 0.85rem; }
.footer li a:hover { color: var(--accent-primary); }
.footer-bottom { text-align: center; padding-top: var(--space-xl); border-top: 1px solid var(--border-subtle); font-size: 0.8rem; color: var(--text-muted); }

/* === Dashboard Layout === */
.app-layout { display: flex; min-height: 100vh; padding-top: 0; }
.sidebar {
  width: 260px; background: var(--bg-primary); border-right: 1px solid var(--border-subtle);
  padding: var(--space-lg); position: fixed; top: 0; left: 0; bottom: 0;
  display: flex; flex-direction: column; z-index: 100;
}
.sidebar-nav { flex: 1; margin-top: var(--space-xl); }
.sidebar-nav a {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: 0.75rem var(--space-md); border-radius: var(--radius-md);
  color: var(--text-secondary); font-weight: 500; font-size: 0.9rem;
  transition: all var(--transition-fast); margin-bottom: 0.25rem;
}
.sidebar-nav a:hover { background: var(--bg-glass); color: var(--text-primary); }
.sidebar-nav a.active { background: rgba(0,212,170,0.1); color: var(--accent-primary); }
.main-content { flex: 1; margin-left: 260px; padding: var(--space-xl); }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-2xl); }
.page-header h1 { font-size: 1.75rem; font-weight: 800; }

/* === Stats Cards === */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-md); margin-bottom: var(--space-2xl); }
.stat-card {
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  backdrop-filter: blur(10px);
}
.stat-card .stat-value {
  font-size: 2rem; font-weight: 800;
  background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-card .stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* === Document Table === */
.doc-table { width: 100%; border-collapse: collapse; }
.doc-table th {
  text-align: left; font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-muted); padding: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
}
.doc-table td { padding: var(--space-md); border-bottom: 1px solid var(--border-subtle); font-size: 0.9rem; }
.doc-table tr:hover td { background: var(--bg-glass); }

/* === Status Badges === */
.badge {
  display: inline-flex; align-items: center; gap: 0.25rem;
  padding: 0.2rem 0.6rem; border-radius: var(--radius-full);
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
}
.badge-success { background: rgba(16,185,129,0.15); color: #10b981; }
.badge-warning { background: rgba(245,158,11,0.15); color: #f59e0b; }
.badge-error { background: rgba(239,68,68,0.15); color: #ef4444; }
.badge-info { background: rgba(0,180,216,0.15); color: #00b4d8; }

/* === Verification Page === */
.verify-container {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: var(--space-xl);
}
.verify-card {
  max-width: 580px; width: 100%; text-align: center;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl); padding: var(--space-3xl);
  backdrop-filter: blur(10px);
}
.verify-animation { margin: var(--space-xl) 0; }
.verify-spinner {
  width: 80px; height: 80px; border: 3px solid var(--border-glass);
  border-top-color: var(--accent-primary); border-radius: 50%;
  animation: spin 1s linear infinite; margin: 0 auto;
}
.verify-success .verify-icon { width: 100px; height: 100px; margin: 0 auto var(--space-lg); border-radius: 50%; background: rgba(16,185,129,0.15); display: flex; align-items: center; justify-content: center; font-size: 3rem; animation: scaleIn 0.5s var(--transition-spring) both; }
.verify-fail .verify-icon { width: 100px; height: 100px; margin: 0 auto var(--space-lg); border-radius: 50%; background: rgba(239,68,68,0.15); display: flex; align-items: center; justify-content: center; font-size: 3rem; animation: scaleIn 0.5s var(--transition-spring) both; }

/* === Animations === */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.5); } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes glow { 0%, 100% { box-shadow: 0 0 20px rgba(0,212,170,0.2); } 50% { box-shadow: 0 0 40px rgba(0,212,170,0.4); } }

.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* === Toast Notifications === */
.toast-container { position: fixed; top: var(--space-xl); right: var(--space-xl); z-index: 3000; display: flex; flex-direction: column; gap: var(--space-sm); }
.toast {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500;
  box-shadow: var(--shadow-lg); animation: fadeInUp 0.3s ease both;
  min-width: 300px; display: flex; align-items: center; gap: var(--space-sm);
}
.toast-success { background: #065f46; color: #a7f3d0; border: 1px solid #10b981; }
.toast-error { background: #7f1d1d; color: #fca5a5; border: 1px solid #ef4444; }
.toast-info { background: #1e3a5f; color: #93c5fd; border: 1px solid #3b82f6; }

/* === Responsive === */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-stats { flex-direction: column; gap: var(--space-lg); }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: none; }
  .pricing-card.featured:hover { transform: translateY(-4px); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .step { flex-direction: column; }
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
  .page-header { flex-direction: column; gap: var(--space-md); align-items: flex-start; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .modal { width: 95%; padding: var(--space-lg); }
}

/* === Utility === */
.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); }
.text-accent { color: var(--accent-primary); }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.gap-1 { gap: var(--space-md); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }
.w-full { width: 100%; }

/* === #11 Hamburger Menu === */
.hamburger {
  display: none; cursor: pointer; flex-direction: column; gap: 5px;
  padding: 8px; background: none; z-index: 1001;
}
.hamburger span {
  display: block; width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: all 0.3s ease;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: rgba(3, 7, 18, 0.98); backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: var(--space-xl);
}
.mobile-nav.active { display: flex; }
.mobile-nav a {
  font-size: 1.25rem; font-weight: 600; color: var(--text-secondary);
  padding: 0.75rem 2rem; transition: color var(--transition-fast);
}
.mobile-nav a:hover { color: var(--accent-primary); }
.mobile-nav .btn { margin-top: var(--space-md); }

/* === #14 Sticky CTA Mobile === */
.sticky-cta-mobile {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 998;
  padding: 12px 16px; background: rgba(3, 7, 18, 0.95); backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-glass);
  animation: slideUp 0.3s ease both;
}
.sticky-cta-mobile .btn { width: 100%; text-align: center; font-size: 0.95rem; padding: 14px; }
.sticky-cta-mobile .badge-free {
  position: absolute; top: -8px; right: 20px;
  background: var(--accent-gradient); color: #030712;
  font-size: 0.65rem; font-weight: 700; padding: 2px 8px;
  border-radius: var(--radius-full); animation: pulse 2s infinite;
}

/* === #19 Back-to-Top Button === */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 997;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-secondary); border: 1px solid var(--border-glass);
  color: var(--accent-primary); font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all var(--transition-base); cursor: pointer;
  box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent-primary); color: #030712; transform: translateY(-2px); box-shadow: var(--shadow-glow); }

/* === #13 Scroll Progress Bar === */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; z-index: 1001;
  background: var(--accent-gradient); width: 0%;
  transition: width 50ms linear;
}

/* === #20 Active Nav Section === */
.nav-links a.active-section { color: var(--accent-primary) !important; }

/* === #17 Notification Badge === */
.nav-badge {
  position: relative;
}
.nav-badge::after {
  content: '3 FREE'; position: absolute; top: -10px; right: -6px;
  background: #ef4444; color: white;
  font-size: 0.5rem; font-weight: 800; padding: 2px 6px;
  border-radius: var(--radius-full);
  animation: badgePulse 2s ease infinite;
  letter-spacing: 0.03em;
  line-height: 1.2;
  pointer-events: none;
  box-shadow: 0 2px 6px rgba(239, 68, 68, 0.4);
}
@keyframes badgePulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }

/* === #8 Animated Scroll Arrow === */
.scroll-arrow {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  animation: bounceArrow 2s ease infinite; cursor: pointer; z-index: 2;
  color: var(--text-muted); font-size: 1.5rem; opacity: 0.6;
  transition: opacity var(--transition-fast);
}
.scroll-arrow:hover { opacity: 1; color: var(--accent-primary); }
@keyframes bounceArrow { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

/* === #37 Payment Icons === */
.payment-icons {
  display: flex; align-items: center; justify-content: center; gap: var(--space-md);
  padding: var(--space-md) 0; margin-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
}
.payment-icon {
  display: flex; align-items: center; gap: 4px;
  font-size: 0.7rem; color: var(--text-muted); font-weight: 500;
  opacity: 0.7; transition: opacity var(--transition-fast);
}
.payment-icon:hover { opacity: 1; }
.payment-icon svg, .payment-icon img { width: 20px; height: 20px; }

/* === #92 Trust Banner === */
.trust-banner {
  display: flex; align-items: center; justify-content: center; gap: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: rgba(0, 212, 170, 0.03); border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  flex-wrap: wrap;
}
.trust-item {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.78rem; color: var(--text-muted); font-weight: 500;
  white-space: nowrap;
}
.trust-item .trust-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-primary); flex-shrink: 0;
}

/* === Animations === */
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }

/* === Mobile Overrides === */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links { display: none !important; }
  .nav-actions { display: none; }
  .sticky-cta-mobile { display: block; }
  .trust-banner { gap: var(--space-md); padding: var(--space-sm) var(--space-md); }
  .trust-item { font-size: 0.7rem; }
  .back-to-top { bottom: 80px; right: 16px; } /* Above sticky CTA */
  .payment-icons { flex-wrap: wrap; }
}