*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --bg: #F5F7FA;
    --surface: #FFFFFF;
    --surface2: #EEF2F8;
    --tg-blue: #2AABEE;
    --tg-deep: #1A7AC4;
    --ai-purple: #6C63FF;
    --accent: #2AABEE;
    --text-primary: #0D1B2A;
    --text-secondary: #5A6A7A;
    --text-muted: #99AAB8;
    --border: rgba(42,171,238,0.12);
    --shadow-sm: 0 2px 12px rgba(13,27,42,0.06);
    --shadow-md: 0 8px 32px rgba(13,27,42,0.10);
    --shadow-lg: 0 20px 60px rgba(13,27,42,0.13);
    --radius: 20px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --font: 'Geologica', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --max-w: 420px;
  }

  html { scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }

  body {
    font-family: var(--font-body);
    background: #E8EDF5;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
  }

  /* Background blur effect behind phone */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
      radial-gradient(ellipse 80% 60% at 20% 20%, rgba(42,171,238,0.18) 0%, transparent 60%),
      radial-gradient(ellipse 60% 80% at 80% 70%, rgba(108,99,255,0.14) 0%, transparent 60%),
      #E2E8F4;
    z-index: 0;
  }

  /* Mobile frame wrapper */
  .phone-wrap {
    position: relative;
    width: 100%;
    max-width: var(--max-w);
    z-index: 1;
    background: var(--bg);
    min-height: 100vh;
    box-shadow: 0 0 80px rgba(13,27,42,0.18), 0 0 0 1px rgba(255,255,255,0.6);
  }

  /* ── NAV ── */
  nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245,247,250,0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font);
    font-weight: 800;
    font-size: 17px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
  }

  .logo-icon {
    width: 30px; height: 30px;
    background: linear-gradient(135deg, var(--tg-blue), var(--ai-purple));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
  }

  .nav-cta {
    font-family: var(--font);
    font-weight: 600;
    font-size: 13px;
    color: var(--tg-blue);
    background: rgba(42,171,238,0.1);
    border: 1px solid rgba(42,171,238,0.25);
    border-radius: 50px;
    padding: 7px 16px;
    text-decoration: none;
    transition: all 0.2s;
  }

  .nav-cta:active { transform: scale(0.96); background: rgba(42,171,238,0.18); }

  /* ── HERO ── */
  .hero {
    padding: 36px 20px 28px;
    background: var(--bg);
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: -60px; right: -60px;
    width: 220px; height: 220px;
    background: radial-gradient(circle, rgba(42,171,238,0.15) 0%, transparent 70%);
    pointer-events: none;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, rgba(42,171,238,0.12), rgba(108,99,255,0.10));
    border: 1px solid rgba(42,171,238,0.22);
    border-radius: 50px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    color: var(--tg-blue);
    margin-bottom: 18px;
    animation: fadeUp 0.6s ease both;
  }

  .badge-dot {
    width: 6px; height: 6px;
    background: var(--tg-blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
  }

  .hero h1 {
    font-family: var(--font);
    font-weight: 900;
    font-size: 30px;
    line-height: 1.15;
    letter-spacing: -0.8px;
    color: var(--text-primary);
    margin-bottom: 14px;
    animation: fadeUp 0.6s 0.1s ease both;
  }

  .hero h1 span {
    background: linear-gradient(135deg, var(--tg-blue), var(--ai-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 24px;
    animation: fadeUp 0.6s 0.2s ease both;
  }

  .hero-cta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    animation: fadeUp 0.6s 0.3s ease both;
  }

  .btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, #2AABEE 0%, #1A7AC4 100%);
    color: #fff;
    font-family: var(--font);
    font-weight: 700;
    font-size: 16px;
    padding: 17px 28px;
    border-radius: 50px;
    text-decoration: none;
    letter-spacing: -0.2px;
    box-shadow: 0 8px 24px rgba(42,171,238,0.35);
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    border-radius: inherit;
  }

  .btn-primary:active { transform: scale(0.97); box-shadow: 0 4px 16px rgba(42,171,238,0.3); }

  .btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 400;
    text-decoration: none;
    padding: 8px;
  }

  /* ── CHAT MOCKUP ── */
  .chat-mockup {
    margin: 28px 20px 0;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255,255,255,0.8);
    animation: fadeUp 0.7s 0.35s ease both;
  }

  .chat-header {
    background: linear-gradient(135deg, #2AABEE, #1A7AC4);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .chat-avatar {
    width: 36px; height: 36px;
    background: rgba(255,255,255,0.25);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
  }

  .chat-info h3 {
    font-family: var(--font);
    font-weight: 700;
    font-size: 14px;
    color: #fff;
  }

  .chat-info p {
    font-size: 11px;
    color: rgba(255,255,255,0.75);
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .online-dot {
    width: 5px; height: 5px;
    background: #4ADE80;
    border-radius: 50%;
    display: inline-block;
  }

  .chat-body {
    padding: 14px 12px;
    background: #F0F4F8;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 200px;
  }

  .msg {
    max-width: 82%;
    animation: msgSlide 0.4s ease both;
  }

  .msg-user { align-self: flex-end; }
  .msg-ai { align-self: flex-start; }

  .msg-bubble {
    padding: 9px 13px;
    border-radius: 18px;
    font-size: 13px;
    line-height: 1.45;
    font-family: var(--font-body);
  }

  .msg-user .msg-bubble {
    background: linear-gradient(135deg, #2AABEE, #1A7AC4);
    color: #fff;
    border-bottom-right-radius: 4px;
  }

  .msg-ai .msg-bubble {
    background: #fff;
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  }

  .msg-voice {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    background: linear-gradient(135deg, #2AABEE, #1A7AC4);
    border-radius: 18px;
    border-bottom-right-radius: 4px;
  }

  .voice-play {
    width: 26px; height: 26px;
    background: rgba(255,255,255,0.25);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 10px;
    color: #fff;
    flex-shrink: 0;
  }

  .voice-waves {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
  }

  .wave-bar {
    width: 3px;
    background: rgba(255,255,255,0.7);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
  }

  .wave-bar:nth-child(1) { height: 8px; animation-delay: 0s; }
  .wave-bar:nth-child(2) { height: 14px; animation-delay: 0.1s; }
  .wave-bar:nth-child(3) { height: 10px; animation-delay: 0.2s; }
  .wave-bar:nth-child(4) { height: 18px; animation-delay: 0.15s; }
  .wave-bar:nth-child(5) { height: 12px; animation-delay: 0.05s; }
  .wave-bar:nth-child(6) { height: 16px; animation-delay: 0.25s; }
  .wave-bar:nth-child(7) { height: 8px; animation-delay: 0.1s; }
  .wave-bar:nth-child(8) { height: 13px; animation-delay: 0.2s; }

  @keyframes wave {
    0%, 100% { transform: scaleY(1); opacity: 0.7; }
    50% { transform: scaleY(0.5); opacity: 1; }
  }

  .voice-dur { font-size: 11px; color: rgba(255,255,255,0.8); }

  .correction-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255,100,100,0.1);
    border: 1px solid rgba(255,100,100,0.2);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 11px;
    color: #E05555;
    margin-bottom: 4px;
  }

  .correction-better {
    background: rgba(42,171,238,0.08);
    border: 1px dashed rgba(42,171,238,0.3);
    border-radius: 6px;
    padding: 3px 8px;
    font-size: 11px;
    color: var(--tg-deep);
    margin-top: 4px;
  }

  .msg-time {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 3px;
    text-align: right;
  }

  .msg-ai .msg-time { text-align: left; }

  .typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 13px;
    background: #fff;
    border-radius: 18px;
    border-bottom-left-radius: 4px;
    width: fit-content;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  }

  .typing-dot {
    width: 6px; height: 6px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite;
  }
  .typing-dot:nth-child(2) { animation-delay: 0.2s; }
  .typing-dot:nth-child(3) { animation-delay: 0.4s; }

  @keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-5px); opacity: 1; }
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes msgSlide {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ── SECTION SHARED ── */
  section { padding: 32px 20px; }

  .section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--tg-blue);
    margin-bottom: 10px;
    display: block;
  }

  .section-title {
    font-family: var(--font);
    font-weight: 800;
    font-size: 24px;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 20px;
  }

  /* ── FEATURES ── */
  .features { background: var(--bg); }

  .features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .feature-card {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 16px 14px;
    border: 1px solid rgba(255,255,255,0.9);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
  }

  .feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--tg-blue), var(--ai-purple));
    opacity: 0;
    transition: opacity 0.2s;
  }

  .feature-card:active { transform: scale(0.98); box-shadow: var(--shadow-md); }
  .feature-card:active::before { opacity: 1; }

  .feature-icon {
    font-size: 26px;
    margin-bottom: 10px;
    display: block;
    line-height: 1;
  }

  .feature-title {
    font-family: var(--font);
    font-weight: 700;
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 5px;
    line-height: 1.2;
  }

  .feature-desc {
    font-size: 11.5px;
    color: var(--text-secondary);
    line-height: 1.5;
    font-weight: 300;
  }

  /* ── HOW IT WORKS ── */
  .how { background: linear-gradient(180deg, #EEF2F8 0%, #F5F7FA 100%); }

  .steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
  }

  .steps::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(180deg, var(--tg-blue), var(--ai-purple));
    opacity: 0.25;
  }

  .step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 0;
    position: relative;
  }

  .step-num {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--tg-blue), var(--ai-purple));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font);
    font-weight: 800;
    font-size: 16px;
    color: #fff;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 14px rgba(42,171,238,0.35);
  }

  .step-content h3 {
    font-family: var(--font);
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.2px;
  }

  .step-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    font-weight: 300;
  }

  /* ── PRICING ── */
  .pricing { background: var(--bg); }

  .pricing-cards {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .pricing-card {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 20px;
    border: 1.5px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: transform 0.2s;
  }

  .pricing-card:active { transform: scale(0.99); }

  .pricing-card.featured {
    border-color: var(--tg-blue);
    background: linear-gradient(160deg, #fff 0%, rgba(42,171,238,0.04) 100%);
    box-shadow: 0 8px 32px rgba(42,171,238,0.18);
  }

  .pricing-card.featured::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--tg-blue), var(--ai-purple));
  }

  .plan-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: linear-gradient(135deg, var(--tg-blue), var(--ai-purple));
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: 50px;
    margin-bottom: 14px;
    text-transform: uppercase;
  }

  .plan-name {
    font-family: var(--font);
    font-weight: 800;
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.3px;
  }

  .plan-tagline {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 14px;
  }

  .plan-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 16px;
  }

  .price-amount {
    font-family: var(--font);
    font-weight: 900;
    font-size: 34px;
    color: var(--text-primary);
    letter-spacing: -1px;
    line-height: 1;
  }

  .featured .price-amount { color: var(--tg-blue); }

  .price-currency {
    font-family: var(--font);
    font-weight: 600;
    font-size: 16px;
    color: var(--text-secondary);
  }

  .price-period {
    font-size: 12px;
    color: var(--text-muted);
  }

  .plan-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
  }

  .plan-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
  }

  .plan-features li::before {
    content: '✓';
    width: 18px; height: 18px;
    background: rgba(42,171,238,0.12);
    color: var(--tg-blue);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 10px;
    font-weight: 700;
    flex-shrink: 0;
  }

  .plan-btn {
    display: block;
    text-align: center;
    padding: 13px;
    border-radius: 50px;
    font-family: var(--font);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
  }

  .plan-btn-outline {
    border: 1.5px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
  }

  .plan-btn-primary {
    background: linear-gradient(135deg, var(--tg-blue), var(--tg-deep));
    color: #fff;
    box-shadow: 0 6px 20px rgba(42,171,238,0.3);
  }

  .plan-btn:active { transform: scale(0.97); }

  /* ── FINAL CTA ── */
  .final-cta {
    background: linear-gradient(160deg, #1A2840 0%, #0D1B2A 100%);
    padding: 40px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .final-cta::before {
    content: '';
    position: absolute;
    top: -80px; left: 50%;
    transform: translateX(-50%);
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(42,171,238,0.2) 0%, transparent 70%);
    pointer-events: none;
  }

  .final-cta h2 {
    font-family: var(--font);
    font-weight: 900;
    font-size: 26px;
    color: #fff;
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin-bottom: 12px;
    position: relative;
  }

  .final-cta p {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
    margin-bottom: 28px;
    font-weight: 300;
    position: relative;
  }

  .final-cta .btn-primary {
    position: relative;
    max-width: 300px;
    margin: 0 auto;
    font-size: 17px;
    box-shadow: 0 12px 32px rgba(42,171,238,0.45);
  }

  .social-proof {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 12px;
  }

  .stars { color: #FFB800; letter-spacing: 1px; }

  /* ── FOOTER ── */
  footer {
    background: #0D1B2A;
    padding: 20px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
  }

  footer p {
    font-size: 12px;
    color: rgba(255,255,255,0.25);
    line-height: 1.7;
  }

  footer a { color: rgba(255,255,255,0.35); text-decoration: none; }

  /* ── STICKY CTA ── */
  .sticky-cta {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: var(--max-w);
    z-index: 200;
    padding: 12px 20px 20px;
    background: linear-gradient(180deg, transparent 0%, rgba(245,247,250,0.95) 30%);
    pointer-events: none;
    transition: opacity 0.3s;
  }

  .sticky-cta.hidden { opacity: 0; pointer-events: none; }

  .sticky-cta a {
    pointer-events: all;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, #2AABEE, #1A7AC4);
    color: #fff;
    font-family: var(--font);
    font-weight: 700;
    font-size: 16px;
    padding: 16px 24px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 8px 28px rgba(42,171,238,0.40), 0 2px 6px rgba(0,0,0,0.12);
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
  }

  .sticky-cta a::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.18), transparent);
  }

  .sticky-cta a:active { transform: scale(0.97); }

  .tg-icon {
    width: 22px; height: 22px;
    flex-shrink: 0;
  }

  /* Divider */
  .divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 0 20px;
  }

  /* Scroll animations */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger children */
  .reveal-stagger > * {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.45s ease, transform 0.45s ease;
  }

  .reveal-stagger.visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0s; }
  .reveal-stagger.visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.08s; }
  .reveal-stagger.visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.16s; }
  .reveal-stagger.visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.24s; }
  .reveal-stagger.visible > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.32s; }
  .reveal-stagger.visible > *:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.40s; }

  /* Trust strip */
  .trust-strip {
    background: var(--surface2);
    padding: 16px 20px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 8px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .trust-item {
    text-align: center;
    flex: 1;
  }

  .trust-num {
    font-family: var(--font);
    font-weight: 800;
    font-size: 18px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    display: block;
  }

  .trust-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 400;
  }

  .trust-sep {
    width: 1px;
    height: 32px;
    background: var(--border);
    flex-shrink: 0;
  }