:root {
    --green: #5CC9BC;
    --green-dark: #5CC9BC;
    --green-light: #eef2fd;
    --dark: #0d1117;
    --dark-2: #1c2333;
    --mid: #4a5568;
    --muted: #8a96a8;
    --border: #e8ecf0;
    --bg: #f8fafb;
    --white: #ffffff;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(0,0,0,0.07);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  body {
    font-family: 'DM Sans', sans-serif;
    background: var(--white);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
  }

  h1, h2, h3, h4, h5 {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
  }

  /* ── NAV ── */
  .navbar {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  .navbar-brand {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--dark) !important;
    letter-spacing: -0.5px;
  }
  .navbar-brand span { color: var(--green); }
  .nav-link {
    color: var(--mid) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 6px 14px !important;
    border-radius: 8px;
    transition: all 0.2s;
  }
  .nav-link:hover { color: var(--dark) !important; background: var(--bg); }
  .btn-nav {
    background: var(--dark);
    color: var(--white) !important;
    border-radius: 10px;
    padding: 8px 20px !important;
    font-weight: 600;
    font-size: 0.88rem;
  }
  .btn-nav:hover { background: var(--dark-2); }

  /* ── BUTTONS ── */
  .btn-primary-heroo {
    background: var(--green);
    color: var(--white);
    border: none;
    border-radius: 12px;
    padding: 14px 28px;
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.2px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
  }
  .btn-primary-heroo:hover {
    background: var(--green-dark);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(52,93,235,0.3);
  }
  .btn-outline-heroo {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--dark);
    border-radius: 12px;
    padding: 12px 26px;
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
  }
  .btn-outline-heroo:hover {
    background: var(--dark);
    color: var(--white);
  }

  /* ── HERO ── */
  .hero {
    background: linear-gradient(135deg, #eef2fd 0%, #ffffff 50%, #f8fafb 100%);
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(52,93,235,0.12) 0%, transparent 70%);
    pointer-events: none;
  }
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--green-light);
    color: var(--green-dark);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(52,93,235,0.2);
  }
  .hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
    color: var(--dark);
  }
  .hero h1 .accent { color: var(--green); }
  .hero-sub {
    font-size: 1.1rem;
    color: var(--mid);
    max-width: 480px;
    margin-bottom: 36px;
    font-weight: 400;
    line-height: 1.7;
  }
  .hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 48px;
    flex-wrap: wrap;
  }
  .hero-stat-item { }
  .hero-stat-num {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--dark);
    display: block;
    letter-spacing: -1px;
  }
  .hero-stat-label {
    font-size: 0.8rem;
    color: var(--muted);
    font-weight: 500;
  }

  /* ── CHAT MOCKUP ── */
  .chat-mockup {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    max-width: 360px;
    margin: 0 auto;
  }
  .chat-header {
    background: var(--dark);
    color: var(--white);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .chat-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--green), #7c3aed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
  }
  .chat-header-info h6 {
    font-family: 'Syne', sans-serif;
    font-size: 0.9rem;
    margin: 0;
    color: white;
  }
  .chat-header-info small { color: rgba(255,255,255,0.55); font-size: 0.75rem; }
  .chat-body { padding: 16px; background: #f6f8fa; }
  .chat-msg {
    display: flex;
    margin-bottom: 10px;
    gap: 8px;
    align-items: flex-end;
  }
  .chat-msg.me { flex-direction: row-reverse; }
  .chat-bubble {
    background: var(--white);
    border-radius: 14px 14px 14px 4px;
    padding: 10px 14px;
    font-size: 0.82rem;
    max-width: 80%;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    line-height: 1.5;
    color: var(--dark);
  }
  .chat-msg.me .chat-bubble {
    background: var(--green);
    color: var(--white);
    border-radius: 14px 14px 4px 14px;
  }
  .chat-bubble strong { display: block; font-size: 0.76rem; margin-bottom: 2px; opacity: 0.65; }
  .chat-action {
    background: var(--white);
    border: 2px solid var(--green);
    color: var(--green);
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    text-align: center;
    margin: 8px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }
  .chat-paid {
    background: #e8faf0;
    border: 1px solid rgba(29,185,84,0.3);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 0.8rem;
    color: var(--green-dark);
    font-weight: 600;
    text-align: center;
    margin: 6px 0;
  }
  .chat-timestamp { font-size: 0.68rem; color: var(--muted); margin-bottom: 2px; }

  /* ── SECTION COMMONS ── */
  section { padding: 80px 0; }
  .section-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: 12px;
    display: block;
  }
  .section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    letter-spacing: -1px;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--dark);
  }
  .section-sub {
    font-size: 1rem;
    color: var(--mid);
    max-width: 520px;
    line-height: 1.7;
  }

  /* ── HOW IT WORKS ── */
  .how-section { background: var(--bg); }
  .step-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    border: 1px solid var(--border);
    position: relative;
    height: 100%;
    transition: all 0.25s;
  }
  .step-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    border-color: rgba(29,185,84,0.3);
  }
  .step-num {
    width: 40px;
    height: 40px;
    background: var(--green-light);
    color: var(--green-dark);
    border-radius: 12px;
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
  }
  .step-icon {
    width: 44px;
    height: 44px;
    background: var(--green-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: var(--green-dark);
  }
  .step-card h5 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--dark);
  }
  .step-card p {
    font-size: 0.88rem;
    color: var(--muted);
    margin: 0;
    line-height: 1.6;
  }
  .step-connector {
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--border);
    font-size: 1.2rem;
    z-index: 1;
  }

  /* ── FEATURES ── */
  .feature-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 20px;
    border-radius: var(--radius);
    background: var(--white);
    border: 1px solid var(--border);
    transition: all 0.2s;
    height: 100%;
  }
  .feature-card:hover {
    border-color: rgba(29,185,84,0.3);
    box-shadow: var(--shadow);
  }
  .feature-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: var(--green-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--green);
  }
  .feature-card h6 {
    font-family: 'Syne', sans-serif;
    font-size: 0.95rem;
    margin-bottom: 4px;
    color: var(--dark);
  }
  .feature-card p {
    font-size: 0.84rem;
    color: var(--muted);
    margin: 0;
    line-height: 1.55;
  }

  /* ── WHY HEROO ── */
  .why-section { background: var(--dark); color: var(--white); }
  .why-section .section-title { color: var(--white); }
  .why-section .section-sub { color: rgba(255,255,255,0.55); }
  .why-section .section-label { color: var(--green); }
  .why-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 28px 24px;
    height: 100%;
    transition: all 0.2s;
  }
  .why-card:hover {
    background: rgba(29,185,84,0.1);
    border-color: rgba(29,185,84,0.3);
  }
  .why-card .badge-green {
    background: rgba(29,185,84,0.15);
    color: var(--green);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 14px;
  }
  .why-card h5 { color: var(--white); font-size: 1rem; margin-bottom: 8px; }
  .why-card p { color: rgba(255,255,255,0.5); font-size: 0.86rem; margin: 0; line-height: 1.6; }

  /* ── CATEGORIES ── */
  .cat-section { background: var(--bg); }
  .cat-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 10px 18px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--dark);
    transition: all 0.2s;
    cursor: pointer;
    text-decoration: none;
    margin: 4px;
  }
  .cat-pill:hover {
    border-color: var(--green);
    color: var(--green-dark);
    background: var(--green-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52,93,235,0.15);
  }
  .cat-pill .cat-emoji { font-size: 1.1rem; }

  /* ── CHAT WORKFLOW (big section) ── */
  .chat-workflow-section { background: linear-gradient(180deg, #ffffff 0%, #eef2fd 100%); }
  .chat-flow-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: all 0.2s;
  }
  .chat-flow-step:hover {
    background: var(--white);
    border-color: var(--border);
    box-shadow: var(--shadow);
  }
  .chat-flow-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    background: var(--dark);
    color: var(--white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
  }
  .chat-flow-step h6 { font-size: 1rem; margin-bottom: 4px; }
  .chat-flow-step p { font-size: 0.86rem; color: var(--muted); margin: 0; line-height: 1.55; }

  /* ── TRUST ── */
  .trust-section { background: var(--white); }
  .trust-card {
    text-align: center;
    padding: 36px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    height: 100%;
    transition: all 0.2s;
  }
  .trust-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
  .trust-icon {
    width: 64px;
    height: 64px;
    background: var(--green-light);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--green);
    margin: 0 auto 20px;
  }
  .trust-card h5 { font-size: 1.05rem; margin-bottom: 10px; }
  .trust-card p { font-size: 0.86rem; color: var(--muted); margin: 0; line-height: 1.6; }

  /* ── USE CASES ── */
  .usecase-section { background: var(--bg); }
  .usecase-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    height: 100%;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: all 0.25s;
  }
  .usecase-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--green), #7c3aed);
  }
  .usecase-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
  .usecase-card .uc-icon { font-size: 2.2rem; margin-bottom: 16px; display: block; }
  .usecase-card h5 { font-size: 1.1rem; margin-bottom: 10px; }
  .usecase-card p { font-size: 0.88rem; color: var(--muted); margin: 0; line-height: 1.6; }

  /* ── SCREEN PLACEHOLDER ── */
  .screen-placeholder {
    background: linear-gradient(135deg, #f0fdf7, #e8ecf0);
    border: 2px dashed rgba(29,185,84,0.35);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 500;
    gap: 10px;
    padding: 8px;
    text-align: center;
  }
  .screen-placeholder i { font-size: 2rem; color: var(--green); opacity: 0.5; }
  .screen-placeholder span { font-size: 0.78rem; opacity: 0.7; }
  .screen-placeholder img {border-radius: var(--radius-lg)}
  /* ── PHONE FRAME ── */
  .phone-frame {
    width: 220px;
    background: var(--dark);
    border-radius: 36px;
    padding: 10px;
    box-shadow: 0 24px 64px rgba(0,0,0,0.25);
    margin: 0 auto;
    position: relative;
  }
  .phone-notch {
    width: 60px;
    height: 6px;
    background: rgba(255,255,255,0.15);
    border-radius: 3px;
    margin: 6px auto 10px;
  }
  .phone-screen {
    border-radius: 28px;
    overflow: hidden;
    background: #f8fafb;
    min-height: 380px;
    position: relative;
  }

  /* ── FAQ ── */
  .faq-section { background: var(--white); }
  .accordion-button {
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--dark);
    background: var(--white);
    padding: 18px 20px;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
  }
  .accordion-button:not(.collapsed) {
    background: var(--green-light);
    color: var(--green-dark);
  }
  .accordion-button::after {
    filter: none;
  }
  .accordion-item {
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    margin-bottom: 8px;
    overflow: hidden;
  }
  .accordion-body {
    font-size: 0.9rem;
    color: var(--mid);
    line-height: 1.7;
    padding: 4px 20px 18px;
    background: var(--white);
  }

  /* ── FINAL CTA ── */
  .final-cta {
    background: var(--dark);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  .final-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(52,93,235,0.15) 0%, transparent 70%);
    pointer-events: none;
  }
  .final-cta h2 { color: var(--white); font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -1px; }
  .final-cta p { color: rgba(255,255,255,0.55); font-size: 1.05rem; max-width: 480px; margin: 0 auto 36px; line-height: 1.7; }

  /* ── FOOTER ── */
  footer {
    background: #0a0e14;
    color: rgba(255,255,255,0.45);
    padding: 60px 0 32px;
    font-size: 0.88rem;
  }
  footer .footer-brand {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--white);
    margin-bottom: 10px;
    display: block;
    letter-spacing: -0.5px;
  }
  footer .footer-brand span { color: var(--green); }
  footer h6 {
    font-family: 'Syne', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
    margin-bottom: 16px;
  }
  footer a {
    color: rgba(255,255,255,0.4);
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
    transition: color 0.2s;
  }
  footer a:hover { color: var(--white); }
  .footer-divider { border-color: rgba(255,255,255,0.08); margin: 40px 0 28px; }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }
  .social-links { display: flex; gap: 12px; }
  .social-link {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.07);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    color: rgba(255,255,255,0.45) !important;
    transition: all 0.2s;
    text-decoration: none;
  }
  .social-link:hover { background: var(--green); color: white !important; }

  /* ── RESPONSIVE ── */
  @media (max-width: 768px) {
    section { padding: 60px 0; }
    .hero { padding: 60px 0; }
    .hero-stats { gap: 20px; }
    .step-connector { display: none; }
    .phone-frame { width: 180px; }
  }

  /* ── ANIMATIONS ── */
  @keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
  }
  .float-anim { animation: float 4s ease-in-out infinite; }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-up { animation: fadeUp 0.6s ease forwards; }

  /* screen shots grid */
  .screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .screenshot-item {
    aspect-ratio: 9/16;
  }
  @media (max-width: 576px) {
    .screenshots-grid { grid-template-columns: repeat(2, 1fr); }
    .screenshots-grid .d-none-sm { display: none !important; }
  }