:root {
    --navy: #0f1c2e;
    --navy-mid: #1a2f48;
    --ink: #1e2d3d;
    --slate: #3a5068;
    --sky: #e8f2fb;
    --white: #ffffff;
    --accent: #2563eb;
    --accent-light: #3b82f6;
    --accent-glow: rgba(37,99,235,0.15);
    --green: #10b981;
    --amber: #f59e0b;
    --surface: #f8fafd;
    --border: #dde8f3;
    --muted: #7a94ad;
    --wa: #25d366;
    --tg: #2aabee;
    --web: #6366f1;
    --radius: 14px;
    --shadow: 0 4px 24px rgba(15,28,46,0.08);
    --shadow-lg: 0 12px 48px rgba(15,28,46,0.12);
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: 'DM Sans', sans-serif;
    background: var(--white);
    color: var(--ink);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  h1,h2,h3,h4 { font-family: 'Sora', sans-serif; line-height: 1.2; }

  a { text-decoration: none; color: inherit; }

  img { max-width: 100%; }

  /* ───── NAVBAR ───── */
  nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 0 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .logo {
    font-family: 'Sora', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--navy);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .logo-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
  }

  .nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--slate);
    transition: color 0.2s;
  }

  .nav-links a:hover { color: var(--navy); }

  .nav-cta {
    background: var(--navy);
    color: var(--white) !important;
    padding: 9px 20px;
    border-radius: 8px;
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    transition: background 0.2s !important;
  }

  .nav-cta:hover { background: var(--accent) !important; color: var(--white) !important; }

  /* ───── HERO ───── */
  .hero {
    padding: 100px 5vw 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-glow);
    border: 1px solid rgba(37,99,235,0.2);
    border-radius: 999px;
    padding: 5px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 24px;
    animation: fadeUp 0.6s ease both;
  }

  .hero-badge span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); display: inline-block; }

  .hero h1 {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 20px;
    animation: fadeUp 0.7s 0.1s ease both;
  }

  .hero h1 em {
    font-style: normal;
    color: var(--accent);
  }

  .hero-sub {
    font-size: 1.1rem;
    color: var(--slate);
    margin-bottom: 36px;
    max-width: 480px;
    animation: fadeUp 0.7s 0.2s ease both;
  }

  .hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    animation: fadeUp 0.7s 0.3s ease both;
  }

  .btn-primary {
    background: var(--accent);
    color: var(--white);
    padding: 13px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 16px rgba(37,99,235,0.35);
  }

  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.4); }

  .btn-secondary {
    background: var(--white);
    color: var(--navy);
    padding: 13px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid var(--border);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
  }

  .btn-secondary:hover { border-color: var(--accent); background: var(--sky); }

  /* ───── INBOX MOCKUP ───── */
  .hero-visual {
    animation: fadeUp 0.8s 0.2s ease both;
    position: relative;
  }

  .mockup-card {
    background: var(--white);
    border-radius: 18px;
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--border);
    overflow: hidden;
    font-size: 0.8rem;
  }

  .mockup-header {
    background: var(--navy);
    color: var(--white);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .mockup-header .logo { font-size: 0.85rem; color: var(--white); }

  .mockup-header-dots { display: flex; gap: 5px; }
  .mockup-header-dots span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.25); }

  .mockup-body {
    display: grid;
    grid-template-columns: 200px 1fr;
    height: 340px;
  }

  .inbox-list {
    border-right: 1px solid var(--border);
    overflow-y: auto;
    background: var(--surface);
  }

  .inbox-label {
    padding: 10px 12px 6px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
  }

  .inbox-item {
    padding: 10px 12px;
    display: flex;
    align-items: flex-start;
    gap: 9px;
    cursor: pointer;
    border-radius: 8px;
    margin: 2px 6px;
    transition: background 0.15s;
  }

  .inbox-item:hover, .inbox-item.active { background: var(--sky); }
  .inbox-item.active { background: var(--accent-glow); }

  .inbox-avatar {
    width: 30px; height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    color: var(--white);
  }

  .inbox-info { flex: 1; overflow: hidden; }
  .inbox-name { font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .inbox-preview { color: var(--muted); font-size: 0.72rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

  .channel-tag {
    font-size: 0.62rem;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .tag-wa { background: #dcfce7; color: #166534; }
  .tag-tg { background: #dbeafe; color: #1e3a8a; }
  .tag-web { background: #ede9fe; color: #4c1d95; }

  .chat-pane {
    display: flex;
    flex-direction: column;
  }

  .chat-top {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .chat-top-name { font-weight: 700; color: var(--navy); }
  .chat-top-sub { font-size: 0.7rem; color: var(--muted); }

  .ai-badge {
    background: #fef3c7;
    color: #92400e;
    border-radius: 6px;
    padding: 3px 8px;
    font-size: 0.68rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .chat-messages {
    flex: 1;
    padding: 12px 14px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #f5f8fc;
  }

  .msg {
    max-width: 80%;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 0.78rem;
    line-height: 1.5;
  }

  .msg-in {
    background: var(--white);
    color: var(--ink);
    border-bottom-left-radius: 3px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    align-self: flex-start;
  }

  .msg-out {
    background: var(--accent);
    color: var(--white);
    border-bottom-right-radius: 3px;
    align-self: flex-end;
  }

  .msg-out.ai-msg {
    background: var(--navy);
  }

  .msg-label {
    font-size: 0.6rem;
    color: var(--muted);
    margin-bottom: 1px;
  }

  .msg-time {
    font-size: 0.6rem;
    opacity: 0.6;
    text-align: right;
    margin-top: 2px;
  }

  .chat-input-row {
    padding: 8px 12px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    align-items: center;
  }

  .chat-input-fake {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 7px 10px;
    font-size: 0.75rem;
    color: var(--muted);
  }

  .chat-send-btn {
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 8px;
    padding: 7px 12px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
  }

  .takeover-banner {
    background: #fef9ec;
    border-top: 1px solid #fcd34d;
    padding: 6px 14px;
    font-size: 0.72rem;
    color: #78350f;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .takeover-btn {
    margin-left: auto;
    background: var(--amber);
    color: var(--white);
    border: none;
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 0.68rem;
    font-weight: 700;
    cursor: pointer;
  }

  /* floating badges */
  .mockup-badge {
    position: absolute;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 8px 12px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--navy);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .badge-tl { top: -18px; right: 24px; animation: float 4s ease-in-out infinite; }
  .badge-br { bottom: -14px; left: 16px; animation: float 4s 2s ease-in-out infinite; }

  @keyframes float {
    0%,100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
  }

  /* ───── TRUST STRIP ───── */
  .trust-strip {
    background: var(--navy);
    padding: 28px 5vw;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 32px 48px;
  }

  .trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    font-weight: 500;
  }

  .trust-icon {
    width: 32px; height: 32px;
    border-radius: 8px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
  }

  /* ───── SECTION BASE ───── */
  section { padding: 88px 5vw; }

  .container { max-width: 1160px; margin: 0 auto; }

  .section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 12px;
  }

  .section-h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 16px;
  }

  .section-sub {
    font-size: 1.05rem;
    color: var(--slate);
    max-width: 560px;
    margin-bottom: 56px;
  }

  /* ───── PROBLEM ───── */
  .problem-section { background: var(--surface); }

  .problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .problem-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    border-top: 3px solid transparent;
    transition: border-top-color 0.2s, transform 0.2s;
  }

  .problem-card:hover { border-top-color: var(--accent); transform: translateY(-3px); }

  .problem-icon {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
  }

  .problem-card h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
  .problem-card p { font-size: 0.9rem; color: var(--slate); }

  /* ───── SOLUTION ───── */
  .solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }

  .solution-list { list-style: none; display: flex; flex-direction: column; gap: 20px; }

  .solution-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: box-shadow 0.2s, border-color 0.2s;
    cursor: default;
  }

  .solution-item:hover { box-shadow: var(--shadow); border-color: var(--accent); }

  .sol-icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    color: var(--accent);
  }

  .sol-text h4 { font-size: 0.95rem; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
  .sol-text p { font-size: 0.85rem; color: var(--slate); }

  .solution-visual {
    background: var(--surface);
    border-radius: 18px;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
  }

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

  .features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .feat-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    transition: box-shadow 0.2s, transform 0.2s;
  }

  .feat-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }

  .feat-icon {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 14px;
  }

  .feat-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--navy); margin-bottom: 6px; }
  .feat-card p { font-size: 0.85rem; color: var(--slate); }

  /* ───── HOW IT WORKS ───── */
  .steps-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
  }

  .steps-row::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--border);
    z-index: 0;
  }

  .step {
    text-align: center;
    padding: 0 16px;
    position: relative;
    z-index: 1;
  }

  .step-num {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Sora', sans-serif;
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--accent);
    margin: 0 auto 20px;
    position: relative;
    z-index: 2;
    transition: background 0.2s, border-color 0.2s;
  }

  .step:hover .step-num { background: var(--accent); color: var(--white); border-color: var(--accent); }

  .step h3 { font-size: 0.95rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
  .step p { font-size: 0.85rem; color: var(--slate); }

  /* ───── USE CASES ───── */
  .usecases-section { background: var(--navy); }

  .usecases-section .section-h2 { color: var(--white); }
  .usecases-section .section-sub { color: rgba(255,255,255,0.6); }

  .uc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .uc-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 24px 20px;
    transition: background 0.2s, transform 0.2s;
  }

  .uc-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-3px); }

  .uc-icon { font-size: 2rem; margin-bottom: 14px; }
  .uc-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
  .uc-card p { font-size: 0.85rem; color: rgba(255,255,255,0.55); }

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

  .pricing-box {
    max-width: 680px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 20px;
    padding: 52px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    text-align: center;
  }

  .pricing-box h2 { font-size: 1.8rem; font-weight: 800; color: var(--navy); margin-bottom: 14px; }
  .pricing-box p { color: var(--slate); margin-bottom: 32px; font-size: 1rem; }

  .pricing-perks {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 20px;
    margin-bottom: 36px;
  }

  .perk {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    color: var(--ink);
    font-weight: 500;
  }

  .perk::before { content: '✓'; color: var(--green); font-weight: 800; }

  /* ───── FINAL CTA ───── */
  .finalcta { background: var(--accent); padding: 88px 5vw; text-align: center; }

  .finalcta h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; color: var(--white); margin-bottom: 16px; }
  .finalcta p { color: rgba(255,255,255,0.8); font-size: 1.05rem; margin-bottom: 36px; }

  .btn-white {
    background: var(--white);
    color: var(--accent);
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transition: transform 0.15s, box-shadow 0.15s;
    display: inline-block;
  }

  .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); }

  /* ───── FOOTER ───── */
  footer {
    background: var(--navy);
    padding: 40px 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
  }

  footer .logo { color: var(--white); }
  footer .copy { color: rgba(255,255,255,0.4); font-size: 0.82rem; }
  .footer-links { display: flex; gap: 20px; }
  .footer-links a { color: rgba(255,255,255,0.5); font-size: 0.82rem; transition: color 0.2s; }
  .footer-links a:hover { color: var(--white); }

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

  /* ───── SCROLL REVEAL ───── */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: none;
  }

  /* ───── RESPONSIVE ───── */
  @media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; gap: 40px; padding: 60px 5vw 48px; }
    .hero h1 { font-size: 2rem; }
    .problem-grid { grid-template-columns: 1fr 1fr; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-row { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .steps-row::before { display: none; }
    .uc-grid { grid-template-columns: repeat(2, 1fr); }
    .solution-grid { grid-template-columns: 1fr; }
    nav .nav-links li:not(:last-child) { display: none; }
  }

  @media (max-width: 600px) {
    .problem-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr 1fr; }
    .uc-grid { grid-template-columns: 1fr 1fr; }
    .steps-row { grid-template-columns: 1fr 1fr; }
    .pricing-box { padding: 32px 24px; }
    .mockup-body { grid-template-columns: 1fr; }
    .inbox-list { display: none; }
  }

  /* channel icon pills */
  .channel-pills {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 20px;
  }

  .ch-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
  }

  .ch-wa { background: #dcfce7; color: #166534; }
  .ch-tg { background: #dbeafe; color: #1e40af; }
  .ch-web { background: #ede9fe; color: #4c1d95; }

  .ch-dot { width: 7px; height: 7px; border-radius: 50%; }
  .ch-wa .ch-dot { background: var(--wa); }
  .ch-tg .ch-dot { background: var(--tg); }
  .ch-web .ch-dot { background: var(--web); }

  /* mini stats in solution visual */
  .sol-stats {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 14px;
    margin-bottom: 18px;
  }

  .sol-stat {
    background: var(--white);
    border-radius: 10px;
    padding: 14px;
    border: 1px solid var(--border);
    text-align: center;
  }

  .sol-stat .num {
    font-family: 'Sora', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--navy);
    display: block;
  }

  .sol-stat .lbl { font-size: 0.72rem; color: var(--muted); }

  /* mini convo in solution */
  .mini-convo { display: flex; flex-direction: column; gap: 7px; }
  .mini-msg { padding: 8px 12px; border-radius: 10px; font-size: 0.78rem; max-width: 85%; }
  .mini-in { background: var(--white); border: 1px solid var(--border); align-self: flex-start; color: var(--ink); }
  .mini-out { background: var(--navy); color: var(--white); align-self: flex-end; }
  .mini-ai { background: var(--accent); color: var(--white); align-self: flex-end; }
  .mini-tag { font-size: 0.62rem; text-align: right; opacity: 0.6; margin-top: 1px; }