:root {
    --ink: #0B1120;
    --ink-soft: #1a2744;
    --ink-muted: #374866;
    --slate: #64748b;
    --cloud: #94a3b8;
    --mist: #cbd5e1;
    --frost: #e2e8f0;
    --snow: #f1f5f9;
    --white: #ffffff;
    --electric: #3b82f6;
    --electric-bright: #60a5fa;
    --electric-glow: rgba(59, 130, 246, 0.15);
    --mint: #10b981;
    --mint-glow: rgba(16, 185, 129, 0.12);
    --amber: #f59e0b;
    --amber-glow: rgba(245, 158, 11, 0.12);
    --violet: #8b5cf6;
    --violet-glow: rgba(139, 92, 246, 0.12);
    --gradient-hero: linear-gradient(165deg, #0B1120 0%, #1e293b 40%, #0f172a 100%);
    --gradient-card: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.18);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.2);
  }

  *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  body {
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--white);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  .container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
  .section-pad { padding: 100px 0; }

  .badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 100px;
    font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  }
  .badge--electric { background: var(--electric-glow); color: var(--electric); border: 1px solid rgba(59,130,246,0.25); }
  .badge--mint { background: var(--mint-glow); color: var(--mint); border: 1px solid rgba(16,185,129,0.2); }
  .badge--amber { background: var(--amber-glow); color: var(--amber); border: 1px solid rgba(245,158,11,0.2); }
  .badge--violet { background: var(--violet-glow); color: var(--violet); border: 1px solid rgba(139,92,246,0.2); }

  /* ─── NAV ─── */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 16px 0;
    background: rgba(11,17,32,0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  nav .container { display: flex; align-items: center; justify-content: space-between; }

  .logo {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--font-body); font-weight: 700; font-size: 20px;
    color: var(--white); text-decoration: none;
  }
  .logo-icon {
    width: 32px; height: 32px; border-radius: 8px;
    background: linear-gradient(135deg, var(--electric) 0%, #2563eb 100%);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 800; color: white;
  }

  .nav-links { display: flex; align-items: center; gap: 32px; }
  .nav-links a:not(.btn) {
    color: var(--cloud); font-size: 14px; font-weight: 500;
    text-decoration: none; transition: color 0.2s;
  }
  .nav-links a:not(.btn):hover { color: var(--white); }

  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: 10px;
    font-family: var(--font-body); font-size: 15px; font-weight: 600;
    text-decoration: none; cursor: pointer; border: none;
    transition: all 0.25s ease;
  }
  .btn--primary {
    background: linear-gradient(135deg, var(--electric) 0%, #2563eb 100%);
    color: white; box-shadow: 0 2px 12px rgba(59,130,246,0.35);
  }
  .btn--primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(59,130,246,0.5); }
  .btn--lg { padding: 16px 32px; font-size: 16px; border-radius: 12px; }
  .btn--dark-outline {
    background: transparent; color: var(--mist);
    border: 1.5px solid rgba(255,255,255,0.15);
  }
  .btn--dark-outline:hover { border-color: rgba(255,255,255,0.35); color: var(--white); background: rgba(255,255,255,0.05); }
  .btn--outline { background: transparent; color: var(--electric); border: 1.5px solid rgba(59,130,246,0.4); }
  .btn--outline:hover { background: var(--electric-glow); border-color: var(--electric); }

  /* ─── HERO ─── */
  .hero {
    position: relative;
    background: var(--gradient-hero);
    padding: 160px 0 120px;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 800px 600px at 20% 50%, rgba(59,130,246,0.08) 0%, transparent 70%),
      radial-gradient(ellipse 600px 400px at 80% 30%, rgba(139,92,246,0.06) 0%, transparent 70%);
    pointer-events: none;
  }
  .hero-grid {
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  }
  .hero .container { position: relative; z-index: 2; }
  .hero-content { max-width: 740px; margin: 0 auto; text-align: center; }
  .hero-eyebrow { margin-bottom: 24px; }

  .hero h1 {
    font-family: var(--font-display); font-size: 56px; font-weight: 700;
    line-height: 1.12; color: var(--white);
    margin-bottom: 24px; letter-spacing: -0.01em;
  }
  .hero h1 em {
    font-style: italic;
    background: linear-gradient(135deg, var(--electric-bright), var(--mint));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  }
  .hero-sub {
    font-size: 19px; line-height: 1.7; color: var(--cloud);
    max-width: 580px; margin: 0 auto 40px;
  }
  .hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
  .hero-stats {
    display: flex; justify-content: center; gap: 48px;
    margin-top: 64px; padding-top: 48px;
    border-top: 1px solid rgba(255,255,255,0.06);
  }
  .hero-stat { text-align: center; }
  .hero-stat-value {
    font-family: var(--font-mono); font-size: 32px; font-weight: 500;
    color: var(--white); letter-spacing: -0.02em;
  }
  .hero-stat-label { font-size: 13px; color: var(--slate); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.05em; }

  /* ─── AI BANNER ─── */
  .ai-banner {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    padding: 48px 0;
    position: relative; overflow: hidden;
    border-top: 1px solid rgba(139,92,246,0.15);
    border-bottom: 1px solid rgba(139,92,246,0.15);
  }
  .ai-banner::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 600px 300px at 50% 50%, rgba(139,92,246,0.1) 0%, transparent 70%);
  }
  .ai-banner .container { position: relative; z-index: 2; text-align: center; }
  .ai-banner h2 {
    font-family: var(--font-display); font-size: 28px; color: var(--white);
    margin-bottom: 12px;
  }
  .ai-banner h2 em {
    font-style: italic;
    background: linear-gradient(135deg, var(--violet), var(--electric-bright));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  }
  .ai-banner p { font-size: 16px; color: var(--cloud); max-width: 640px; margin: 0 auto 28px; line-height: 1.7; }

  .ai-pills { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
  .ai-pill {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 20px; border-radius: 100px;
    background: rgba(139,92,246,0.1); border: 1px solid rgba(139,92,246,0.2);
    color: var(--mist); font-size: 14px; font-weight: 500;
  }
  .ai-pill .ai-sparkle { font-size: 16px; }

  /* ─── HOW IT WORKS ─── */
  .how { background: var(--snow); }
  .section-header { max-width: 600px; margin: 0 auto 60px; text-align: center; }
  .section-header h2 {
    font-family: var(--font-display); font-size: 40px; font-weight: 700;
    color: var(--ink); line-height: 1.2; margin-bottom: 16px;
  }
  .section-header p { font-size: 17px; color: var(--slate); line-height: 1.7; }

  .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .step {
    background: var(--white); border: 1px solid var(--frost);
    border-radius: var(--radius-lg); padding: 32px 24px;
    transition: all 0.3s;
  }
  .step:hover { border-color: var(--electric); box-shadow: var(--shadow-glow); transform: translateY(-4px); }
  .step-num {
    width: 36px; height: 36px; border-radius: 10px;
    background: var(--electric-glow);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono); font-size: 14px; font-weight: 600;
    color: var(--electric); margin-bottom: 20px;
  }
  .step h3 { font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
  .step p { font-size: 14px; color: var(--slate); line-height: 1.65; }
  .step .ai-tag {
    display: inline-flex; align-items: center; gap: 4px;
    margin-top: 12px; padding: 4px 10px; border-radius: 6px;
    background: var(--violet-glow); font-size: 11px; font-weight: 600;
    color: var(--violet); text-transform: uppercase; letter-spacing: 0.04em;
  }

  /* ─── FEATURES ─── */
  .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .feature-card {
    padding: 36px 28px; border-radius: var(--radius-lg);
    border: 1px solid var(--frost); background: var(--white);
    transition: all 0.3s; position: relative; overflow: hidden;
  }
  .feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--electric), var(--mint));
    opacity: 0; transition: opacity 0.3s;
  }
  .feature-card.ai-card::before {
    background: linear-gradient(90deg, var(--violet), var(--electric-bright));
  }
  .feature-card:hover { border-color: transparent; box-shadow: var(--shadow-md); transform: translateY(-3px); }
  .feature-card:hover::before { opacity: 1; }

  .feature-icon {
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 20px;
  }
  .feature-card h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
  .feature-card h3 .ai-badge-inline {
    display: inline-flex; align-items: center; gap: 3px;
    margin-left: 6px; padding: 2px 8px; border-radius: 5px;
    background: var(--violet-glow); font-size: 10px; font-weight: 700;
    color: var(--violet); text-transform: uppercase; letter-spacing: 0.04em;
    vertical-align: middle;
  }
  .feature-card p { font-size: 14.5px; color: var(--slate); line-height: 1.65; }
  .feature-card .stat-callout {
    margin-top: 16px; padding: 10px 14px;
    background: var(--snow); border-radius: 8px;
    font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft);
  }

  /* ─── CASE STUDY ─── */
  .case-study {
    background: var(--ink); position: relative; overflow: hidden;
  }
  .case-study::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 700px 500px at 80% 50%, rgba(59,130,246,0.08) 0%, transparent 70%);
  }
  .case-study .section-header h2 { color: var(--white); }
  .case-study .section-header p { color: var(--cloud); }
  .cs-wrapper { position: relative; z-index: 2; }
  .cs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
  .cs-narrative { color: var(--mist); }
  .cs-label {
    font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--electric-bright); margin-bottom: 16px;
  }
  .cs-narrative h3 {
    font-family: var(--font-display); font-size: 28px; font-weight: 700;
    color: var(--white); line-height: 1.3; margin-bottom: 20px;
  }
  .cs-narrative h3 em {
    font-style: italic;
    background: linear-gradient(135deg, var(--electric-bright), var(--mint));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  }
  .cs-narrative p { font-size: 15px; line-height: 1.75; margin-bottom: 16px; color: var(--cloud); }
  .cs-quote {
    margin-top: 24px; padding: 20px 24px;
    border-left: 3px solid var(--electric);
    background: rgba(255,255,255,0.03); border-radius: 0 8px 8px 0;
  }
  .cs-quote p { font-style: italic; font-size: 15px; color: var(--mist); margin-bottom: 8px; }
  .cs-quote cite { font-style: normal; font-size: 13px; color: var(--slate); }

  .cs-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .cs-metric {
    padding: 24px 20px; border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.08);
    background: var(--gradient-card); backdrop-filter: blur(8px);
  }
  .cs-metric-value {
    font-family: var(--font-mono); font-size: 36px; font-weight: 500;
    color: var(--white); letter-spacing: -0.02em;
  }
  .cs-metric-label { font-size: 13px; color: var(--cloud); margin-top: 4px; }
  .cs-metric-context { font-size: 11px; color: var(--slate); margin-top: 8px; }

  .cs-timeline {
    grid-column: 1 / -1; margin-top: 24px; padding: 28px 32px;
    border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
  }
  .cs-timeline h4 {
    font-size: 13px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--electric-bright); margin-bottom: 20px;
  }
  .cs-tl-row {
    display: grid; grid-template-columns: 100px 1fr;
    gap: 16px; padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.04); font-size: 14px;
  }
  .cs-tl-row:last-child { border-bottom: none; }
  .cs-tl-week { font-family: var(--font-mono); color: var(--mint); font-weight: 500; }
  .cs-tl-desc { color: var(--mist); }

  /* ─── PRICING ─── */
  .pricing { background: var(--snow); }
  .pricing-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
    max-width: 860px; margin: 0 auto;
  }
  .pricing-card {
    background: var(--white); border-radius: var(--radius-lg);
    border: 2px solid var(--frost); overflow: hidden;
    transition: all 0.3s; position: relative;
  }
  .pricing-card.featured {
    border-color: var(--electric);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
  }
  .pricing-header {
    padding: 36px 32px 28px; text-align: center; position: relative;
  }
  .pricing-card.featured .pricing-header {
    background: linear-gradient(135deg, var(--ink) 0%, var(--ink-soft) 100%);
  }
  .pricing-card:not(.featured) .pricing-header {
    background: var(--snow); border-bottom: 1px solid var(--frost);
  }
  .pricing-popular {
    position: absolute; top: 14px; right: 14px;
    padding: 4px 12px; border-radius: 100px;
    background: var(--mint); color: white;
    font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  }
  .pricing-header h3 { font-family: var(--font-display); font-size: 24px; margin-bottom: 8px; }
  .pricing-card.featured .pricing-header h3 { color: var(--white); }
  .pricing-card:not(.featured) .pricing-header h3 { color: var(--ink); }
  .pricing-header .price { font-family: var(--font-mono); font-size: 48px; font-weight: 500; letter-spacing: -0.03em; }
  .pricing-card.featured .pricing-header .price { color: var(--white); }
  .pricing-card:not(.featured) .pricing-header .price { color: var(--ink); }
  .pricing-header .price span { font-size: 18px; font-weight: 400; }
  .pricing-card.featured .pricing-header .price span { color: var(--cloud); }
  .pricing-card:not(.featured) .pricing-header .price span { color: var(--slate); }
  .pricing-header .price-note { font-size: 13px; margin-top: 4px; }
  .pricing-card.featured .pricing-header .price-note { color: var(--slate); }
  .pricing-card:not(.featured) .pricing-header .price-note { color: var(--slate); }

  .pricing-body { padding: 28px 32px 36px; }
  .pricing-features { list-style: none; }
  .pricing-features li {
    display: flex; align-items: flex-start; gap: 12px;
    padding: 9px 0; font-size: 14.5px; color: var(--ink-soft);
    border-bottom: 1px solid var(--frost);
  }
  .pricing-features li:last-child { border-bottom: none; }
  .pricing-features .check {
    flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
    background: var(--mint-glow); color: var(--mint);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; margin-top: 2px;
  }
  .pricing-features strong { color: var(--ink); }
  .pricing-features .ai-label {
    display: inline-flex; padding: 1px 6px; border-radius: 4px;
    background: var(--violet-glow); font-size: 10px; font-weight: 700;
    color: var(--violet); text-transform: uppercase; letter-spacing: 0.03em;
    margin-left: 4px; vertical-align: middle;
  }
  .pricing-cta { margin-top: 24px; text-align: center; }
  .pricing-cta .btn { width: 100%; }
  .pricing-footnote {
    text-align: center; margin-top: 28px;
    font-size: 14px; color: var(--slate);
  }
  .pricing-footnote strong { color: var(--ink-soft); }

  /* ─── SIGNUP ─── */
  .signup {
    background: var(--gradient-hero);
    position: relative; overflow: hidden;
  }
  .signup::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 600px 400px at 50% 80%, rgba(59,130,246,0.1) 0%, transparent 70%);
  }
  .signup .section-header h2 { color: var(--white); }
  .signup .section-header p { color: var(--cloud); }
  .signup-card {
    max-width: 560px; margin: 0 auto; position: relative; z-index: 2;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg); padding: 40px;
    backdrop-filter: blur(12px);
  }
  .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .form-group { display: flex; flex-direction: column; gap: 6px; }
  .form-group.full { grid-column: 1 / -1; }
  .form-group label {
    font-size: 13px; font-weight: 600; color: var(--mist);
    text-transform: uppercase; letter-spacing: 0.04em;
  }
  .form-group input,
  .form-group select {
    width: 100%; min-width: 0; box-sizing: border-box;
    padding: 12px 16px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.06);
    color: var(--white); font-family: var(--font-body); font-size: 15px;
    transition: all 0.2s; outline: none;
    -webkit-appearance: none; -moz-appearance: none; appearance: none;
  }
  .form-group input::placeholder { color: var(--slate); }
  .form-group select { color: var(--cloud); cursor: pointer; }
  .form-group select option { background: var(--ink); color: var(--white); }
  .form-group input:focus,
  .form-group select:focus {
    border-color: var(--electric);
    box-shadow: 0 0 0 3px var(--electric-glow);
  }
  .form-submit { margin-top: 24px; }
  .form-submit .btn { width: 100%; padding: 16px; font-size: 16px; }
  .form-note { text-align: center; margin-top: 16px; font-size: 13px; color: var(--slate); }
  .signup-confirmation { text-align: center; padding: 24px 0; display: none; }
  .signup-confirmation.active { display: block; }
  .signup-form.hidden { display: none; }
  .confirm-icon {
    width: 64px; height: 64px; border-radius: 50%;
    background: var(--mint-glow); border: 2px solid var(--mint);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px; font-size: 28px;
  }
  .signup-confirmation h3 {
    font-family: var(--font-display); font-size: 26px;
    color: var(--white); margin-bottom: 12px;
  }
  .signup-confirmation p { font-size: 15px; color: var(--cloud); line-height: 1.7; max-width: 400px; margin: 0 auto; }

  /* ─── FOOTER ─── */
  footer {
    background: var(--ink); padding: 40px 0;
    border-top: 1px solid rgba(255,255,255,0.06);
  }
  footer .container { display: flex; justify-content: space-between; align-items: center; }
  footer p { font-size: 13px; color: var(--slate); }
  footer a { color: var(--cloud); text-decoration: none; }
  footer a:hover { color: var(--white); }

  /* ─── RESPONSIVE ─── */
  @media (max-width: 900px) {
    .hero h1 { font-size: 38px; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .steps { grid-template-columns: 1fr 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .cs-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; max-width: 440px; }
    .form-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .ai-pills { gap: 8px; }
  }
  @media (max-width: 600px) {
    .hero h1 { font-size: 32px; }
    .hero { padding: 140px 0 80px; }
    .section-pad { padding: 64px 0; }
    .section-header h2 { font-size: 30px; }
    .steps { grid-template-columns: 1fr; }
    .cs-metrics { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .pricing-header, .pricing-body { padding-left: 24px; padding-right: 24px; }
    .signup-card { padding: 28px 20px; }
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-up { opacity: 0; animation: fadeUp 0.7s ease forwards; }
  .fade-up.d1 { animation-delay: 0.1s; }
  .fade-up.d2 { animation-delay: 0.2s; }
  .fade-up.d3 { animation-delay: 0.3s; }
  .fade-up.d4 { animation-delay: 0.4s; }
  .fade-up.d5 { animation-delay: 0.5s; }
  .fade-up.d6 { animation-delay: 0.6s; }