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

    :root {
      --accent:      #7C5CFC;
      --accent-dim:  rgba(124,92,252,0.12);
      --accent-glow: rgba(124,92,252,0.35);
      --bg:          #000;
      --surface:     #0f0f0f;
      --surface2:    #161616;
      --border:      rgba(255,255,255,0.07);
      --border-hi:   rgba(255,255,255,0.12);
      --text:        #fff;
      --text-muted:  rgba(255,255,255,0.52);
      --text-dim:    rgba(255,255,255,0.28);
      --phone-w:     380px;
      --phone-h:     778px;
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Helvetica Neue', sans-serif;
      background: var(--bg);
      color: var(--text);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      cursor: none;
    }

    /* ═══════════════════════════════════════════
       CUSTOM CURSOR
    ═══════════════════════════════════════════ */
    #cursor-dot {
      position: fixed;
      top: 0; left: 0;
      width: 8px; height: 8px;
      background: #fff;
      border-radius: 50%;
      pointer-events: none;
      z-index: 9999;
      will-change: transform;
      transition: opacity 0.2s;
      animation: laserPulse 1.6s ease-in-out infinite;
    }
    @keyframes laserPulse {
      0%, 100% {
        box-shadow:
          0 0 0 1.5px rgba(180,120,255,0.9),
          0 0 6px  3px  rgba(255,255,255,1),
          0 0 18px 5px  rgba(150,80,255,0.95),
          0 0 45px 12px rgba(124,92,252,0.7),
          0 0 90px 24px rgba(124,92,252,0.35);
      }
      50% {
        box-shadow:
          0 0 0 2px   rgba(200,140,255,1),
          0 0 10px 4px rgba(255,255,255,1),
          0 0 28px 8px rgba(170,100,255,1),
          0 0 70px 18px rgba(124,92,252,0.9),
          0 0 140px 40px rgba(124,92,252,0.5);
      }
    }
    #cursor-ring {
      position: fixed;
      top: 0; left: 0;
      width: 56px; height: 56px;
      border-radius: 50%;
      pointer-events: none;
      z-index: 9998;
      will-change: transform;
      background: radial-gradient(circle, rgba(124,92,252,0.18) 0%, rgba(124,92,252,0.06) 45%, transparent 70%);
      transition: opacity 0.2s;
      display: block;
    }

    /* ═══════════════════════════════════════════
       EASINGS
    ═══════════════════════════════════════════ */
    :root {
      --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
      --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    /* ═══════════════════════════════════════════
       REVEAL
    ═══════════════════════════════════════════ */
    .reveal {
      opacity: 0;
      transform: translateY(50px);
      transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
    }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    .reveal.d1 { transition-delay: 0.10s; }
    .reveal.d2 { transition-delay: 0.20s; }
    .reveal.d3 { transition-delay: 0.30s; }
    .reveal.d4 { transition-delay: 0.40s; }
    .reveal-left {
      opacity: 0;
      transform: translateX(-70px) scale(0.96);
      transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
    }
    .reveal-left.visible { opacity: 1; transform: translateX(0) scale(1); }
    .reveal-right {
      opacity: 0;
      transform: translateX(70px) scale(0.96);
      transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
    }
    .reveal-right.visible { opacity: 1; transform: translateX(0) scale(1); }
    .slide-from-left {
      opacity: 0;
      transform: translateX(-90px) scale(0.94);
      transition: opacity 1.1s var(--ease-out), transform 1.2s var(--ease-out);
    }
    .slide-from-left.visible { opacity: 1; transform: translateX(0) scale(1); }
    .slide-from-right {
      opacity: 0;
      transform: translateX(90px) scale(0.94);
      transition: opacity 1.1s var(--ease-out), transform 1.2s var(--ease-out);
    }
    .slide-from-right.visible { opacity: 1; transform: translateX(0) scale(1); }

    /* ═══════════════════════════════════════════
       KEYFRAMES
    ═══════════════════════════════════════════ */
    @keyframes sTitleNeonIn {
      from { color: rgba(255,255,255,0.4); text-shadow: none; }
      45%  {
        text-shadow:
          0 0 30px rgba(192,132,252,0.85),
          0 0 64px rgba(139,92,246,0.55),
          0 0 110px rgba(109,40,217,0.3);
      }
      to {
        color: rgba(255,255,255,1);
        text-shadow:
          0 0 22px rgba(192,132,252,0.5),
          0 0 52px rgba(139,92,246,0.25),
          0 0 90px rgba(109,40,217,0.12);
      }
    }
    @keyframes popIn {
      from { opacity:0; transform:scale(0.82) translateY(18px); }
      to   { opacity:1; transform:scale(1) translateY(0); }
    }
    @keyframes cellIn {
      from { opacity:0; transform:scale(0.9) translateY(28px); }
      to   { opacity:1; transform:scale(1) translateY(0); }
    }
    @keyframes stepIn {
      from { opacity:0; transform:translateY(44px) scale(0.95); }
      to   { opacity:1; transform:translateY(0) scale(1); }
    }

    /* ═══════════════════════════════════════════
       S3D — 3D PERSPECTIVE REVEAL
    ═══════════════════════════════════════════ */
    .s3d {
      opacity: 0;
      transform: perspective(1200px) rotateX(12deg) translateY(60px);
      transition: opacity 1.1s var(--ease-out), transform 1.2s var(--ease-out);
    }
    .s3d.s3d-in {
      opacity: 1;
      transform: perspective(1200px) rotateX(0deg) translateY(0);
    }

    /* ═══════════════════════════════════════════
       NEON SPOT — mouse-tracking hover glow
    ═══════════════════════════════════════════ */
    .neon-spot {
      position: absolute; inset: 0; pointer-events: none;
      border-radius: inherit;
      opacity: 0; transition: opacity 0.4s;
      background: radial-gradient(
        circle at var(--sx,50%) var(--sy,50%),
        rgba(255,255,255,0.09) 0%,
        rgba(124,92,252,0.06) 30%,
        transparent 65%
      );
    }
    .neon-spot.lit { opacity: 1; }

    /* ═══════════════════════════════════════════
       HERO GRID — animated dot grid
    ═══════════════════════════════════════════ */
    .hero-grid {
      position: absolute; inset: 0; pointer-events: none; z-index: 0;
      background-image: radial-gradient(rgba(124,92,252,0.20) 1px, transparent 1px);
      background-size: 50px 50px;
      mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, black 5%, transparent 70%);
      -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, black 5%, transparent 70%);
      animation: gridDrift 28s linear infinite;
    }
    @keyframes gridDrift {
      from { background-position: 0 0; }
      to   { background-position: 50px 50px; }
    }

    /* ═══════════════════════════════════════════
       HERO STATS STRIP
    ═══════════════════════════════════════════ */
    .hero-stats {
      position: relative; z-index: 1;
      display: flex; gap: 44px; margin-top: 52px;
      border-top: 1px solid rgba(0,0,0,0.1);
      padding-top: 32px;
      flex-wrap: wrap; justify-content: center;
    }
    .hero-stat { text-align: center; }
    .hero-stat-num {
      font-size: clamp(24px, 3vw, 36px); font-weight: 800; letter-spacing: -0.04em;
      background: linear-gradient(135deg, #c084fc, #7c5cfc);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .hero-stat-label { font-size: 12px; color: rgba(0,0,0,0.45); margin-top: 5px; letter-spacing: 0.3px; }

    /* ═══════════════════════════════════════════
       NAV
    ═══════════════════════════════════════════ */
    #nav {
      position: fixed;
      inset: 0 0 auto 0;
      z-index: 200;
      height: 56px;
      display: flex;
      align-items: center;
      padding: 0 36px;
      transition: background 0.4s ease, border-color 0.4s ease;
      border-bottom: 1px solid transparent;
    }
    #nav.blur {
      background: rgba(0,0,0,0.72);
      backdrop-filter: blur(22px) saturate(1.4);
      -webkit-backdrop-filter: blur(22px) saturate(1.4);
      border-color: var(--border);
    }
    /* nav on light (hero) section */
    #nav.nav-light .nav-logo { color: #111; }
    #nav.nav-light .nav-logo span { color: #111 !important; }
    #nav.nav-light .nav-link { color: rgba(0,0,0,0.5); }
    #nav.nav-light .nav-link:hover { color: #111; }
    #nav.nav-light .nav-link.active { color: #111; }
    #nav.nav-light .nav-pill { border-color: rgba(0,0,0,0.2); color: rgba(0,0,0,0.6); }
    #nav.nav-light .nav-pill:hover { border-color: rgba(0,0,0,0.4); color: #111; }
    #nav.nav-light.blur {
      background: rgba(242,242,244,0.88);
      backdrop-filter: blur(22px) saturate(1.4);
      -webkit-backdrop-filter: blur(22px) saturate(1.4);
      border-color: rgba(0,0,0,0.08);
    }
    .nav-logo {
      display: flex; align-items: center; gap: 9px;
      font-size: 16px; font-weight: 700; letter-spacing: -0.4px;
      color: var(--text); text-decoration: none; user-select: none;
    }
    .logo-pin {
      width: 26px; height: 26px;
      border-radius: 50% 50% 50% 0;
      transform: rotate(-45deg);
      background: var(--accent);
      box-shadow: 0 0 12px var(--accent-glow);
      display: grid; place-items: center; flex-shrink: 0;
    }
    .logo-dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,0.9); transform: rotate(45deg); }
    .nav-fill { flex: 1; }
    .nav-links { display: flex; gap: 4px; margin-right: 16px; }
    .nav-link {
      padding: 7px 16px; font-size: 13px; font-weight: 500;
      color: var(--text-muted); text-decoration: none;
      transition: color 0.2s;
    }
    .nav-link:hover { color: var(--text); }
    .nav-link.active { color: var(--text); position: relative; }
    .nav-link.active::after {
      content: ''; position: absolute; bottom: -2px; left: 16px; right: 16px;
      height: 1.5px; border-radius: 2px;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
    }
    .nav-pill {
      padding: 7px 20px; border-radius: 30px;
      border: 1px solid rgba(255,255,255,0.16);
      font-size: 13px; font-weight: 500; color: var(--text-muted);
      text-decoration: none; transition: all 0.2s;
    }
    .nav-pill:hover { border-color: rgba(255,255,255,0.35); color: var(--text); }

    /* ═══════════════════════════════════════════
       HERO
    ═══════════════════════════════════════════ */
    #hero {
      position: relative; height: 100svh;
      display: flex; flex-direction: column;
      align-items: center; justify-content: center;
      text-align: center; padding: 0 24px 80px; overflow: hidden;
    }
    .hero-bg {
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse 75% 65% at 50% -15%, rgba(124,92,252,0.20) 0%, transparent 65%),
        radial-gradient(ellipse 55% 45% at 15% 75%,  rgba(0,122,255,0.07)  0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 85% 55%,  rgba(124,92,252,0.05) 0%, transparent 60%),
        #f2f2f4;
    }
    .hero-bg::after {
      content: ''; position: absolute; inset: 0;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
      opacity: 0.6; pointer-events: none;
    }
    .hero-badge {
      position: relative; z-index: 1;
      display: inline-flex; align-items: center; gap: 7px;
      padding: 6px 15px; border-radius: 20px;
      border: 1px solid rgba(124,92,252,0.35); background: rgba(124,92,252,0.07);
      font-size: 11.5px; font-weight: 600; letter-spacing: 0.6px;
      color: var(--accent); margin-bottom: 30px;
    }
    .badge-dot {
      width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
      animation: blink 2.4s ease-in-out infinite;
    }
    @keyframes blink {
      0%,100% { opacity:1; transform:scale(1); }
      50%      { opacity:0.4; transform:scale(0.75); }
    }
    .hero-h1 {
      position: relative; z-index: 1;
      font-size: clamp(62px, 10vw, 120px);
      font-weight: 800; letter-spacing: -0.05em; line-height: 1.0;
      background: linear-gradient(175deg, #111 30%, rgba(0,0,0,0.5));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .hero-sub {
      position: relative; z-index: 1; margin-top: 22px;
      font-size: clamp(16px, 2.2vw, 22px); font-weight: 400;
      color: rgba(0,0,0,0.58); letter-spacing: -0.01em;
    }
    .hero-cta {
      position: relative; z-index: 1;
      display: flex; gap: 12px; margin-top: 42px;
      flex-wrap: wrap; justify-content: center;
    }
    .btn-fill {
      padding: 13px 30px; background: var(--accent); border-radius: 32px;
      font-size: 15px; font-weight: 600; color: #fff; text-decoration: none;
      transition: all 0.22s; box-shadow: 0 0 28px var(--accent-glow);
    }
    .btn-fill:hover { background:#8e6dff; box-shadow:0 0 44px var(--accent-glow); transform:translateY(-1px); }
    .btn-outline {
      padding: 13px 30px; border-radius: 32px;
      border: 1px solid rgba(0,0,0,0.18);
      font-size: 15px; font-weight: 500; color: rgba(0,0,0,0.62); text-decoration: none;
      transition: all 0.22s;
    }
    .btn-outline:hover { border-color:rgba(0,0,0,0.38); color:#000; }
    .scroll-cue {
      position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
      z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 7px;
      color: rgba(0,0,0,0.35);
    }
    .scroll-cue span { font-size: 10.5px; letter-spacing: 2px; }
    .scroll-cue-arrow {
      width: 18px; height: 18px;
      border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg); animation: cueDown 1.9s ease-in-out infinite;
    }
    @keyframes cueDown {
      0%,100% { transform:rotate(45deg) translate(0,0); opacity:0.5; }
      50%      { transform:rotate(45deg) translate(5px,5px); opacity:1; }
    }

    /* ═══════════════════════════════════════════
       PROBLEM
    ═══════════════════════════════════════════ */
    #problem {
      padding: 120px 36px 100px;
      position: relative;
    }
    .problem-inner {
      max-width: 1200px; margin: 0 auto; position: relative; z-index: 1;
    }
    #problem::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(239,68,68,0.06) 0%, transparent 65%);
    }
    .problem-header { text-align: center; margin-bottom: 60px; }
    .section-label {
      display: inline-block; font-size: 11px; font-weight: 700;
      letter-spacing: 2.5px; text-transform: uppercase;
      color: var(--accent); margin-bottom: 18px;
    }
    .section-h2 {
      font-size: clamp(34px, 5vw, 60px); font-weight: 700;
      letter-spacing: -0.04em; line-height: 1.1;
    }
    .hi  { color: #c084fc; text-shadow: 0 0 18px rgba(192,132,252,0.6), 0 0 40px rgba(139,92,246,0.3); }
    .hi2 { color: #60a5fa; text-shadow: 0 0 18px rgba(96,165,250,0.6), 0 0 40px rgba(59,130,246,0.3); }
    .problem-grid {
      display: grid; grid-template-columns: repeat(3,1fr); gap: 16px;
    }
    .prob-card {
      background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
      border-radius: 20px; padding: 36px 28px;
      position: relative; overflow: hidden;
      display: flex; flex-direction: column; gap: 16px;
      transition: background 0.25s, border-color 0.25s, transform 0.3s var(--ease-out);
    }
    .prob-card:hover {
      background: rgba(255,255,255,0.055);
      border-color: rgba(124,92,252,0.35);
      transform: translateY(-6px);
    }
    .prob-card.reveal.visible { animation: cellIn 0.7s var(--ease-out) both; opacity: 1; transform: none; }
    .prob-card.reveal.d1.visible { animation-delay: 0.10s; }
    .prob-card.reveal.d2.visible { animation-delay: 0.20s; }
    .prob-num {
      font-size: 11px; font-weight: 800; letter-spacing: 3px;
      color: rgba(124,92,252,0.8); text-transform: uppercase;
    }
    .prob-title { font-size: 23px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.3; }
    .prob-desc { font-size: 15px; color: var(--text-muted); line-height: 1.8; }

    /* ═══════════════════════════════════════════
       STATEMENT
    ═══════════════════════════════════════════ */
    #statement {
      position: relative; padding: 120px 36px;
      text-align: center; overflow: hidden; min-height: 80vh;
      display: flex; align-items: center; justify-content: center;
      background: var(--bg);
    }
    #statement::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 38px 38px;
      mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 10%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 10%, transparent 75%);
    }
    .statement-orb {
      position: absolute; width: 900px; height: 520px;
      left: 50%; top: 50%; transform: translate(-50%,-50%);
      background: radial-gradient(ellipse, rgba(124,92,252,0.14) 0%, rgba(0,122,255,0.05) 45%, transparent 70%);
      border-radius: 50%; pointer-events: none;
      animation: stmtOrb 7s ease-in-out infinite;
    }
    @keyframes stmtOrb {
      0%,100% { opacity: .6; transform: translate(-50%,-50%) scale(1); }
      50%     { opacity: 1;  transform: translate(-50%,-50%) scale(1.14); }
    }
    .statement-inner { position: relative; z-index: 1; max-width: 900px; margin: 0 auto; }
    .statement-kicker {
      font-size: 11px; font-weight: 700; letter-spacing: 4px;
      text-transform: uppercase; color: var(--accent); margin-bottom: 44px;
    }
    .statement-kicker::after {
      content: ''; display: block; width: 36px; height: 1px; margin: 18px auto 0;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
    }
    .statement-lines { margin-bottom: 40px; }
    .statement-line {
      font-size: clamp(38px, 5.5vw, 72px); font-weight: 800;
      letter-spacing: -0.05em; line-height: 1.13; margin-bottom: 8px;
      color: rgba(255,255,255,0.9);
    }
    .statement-line em { font-style: normal; color: var(--accent); text-shadow: 0 0 18px rgba(124,92,252,0.6), 0 0 40px rgba(124,92,252,0.3); }
    .statement-sub {
      margin-top: 36px; font-size: clamp(17px, 2.2vw, 22px);
      color: rgba(255,255,255,0.55); line-height: 1.8; font-weight: 300;
      max-width: 540px; margin-left: auto; margin-right: auto;
      transition: color 0.6s var(--ease-out), text-shadow 0.8s var(--ease-out);
    }
    .statement-sub.visible {
      color: rgba(255,255,255,0.82);
      text-shadow: 0 0 20px rgba(192,132,252,0.45), 0 0 48px rgba(124,92,252,0.25), 0 0 90px rgba(109,40,217,0.12);
    }

    /* ═══════════════════════════════════════════
       INTRO / FEATURES HEADER (shared)
    ═══════════════════════════════════════════ */
    .section-intro { text-align: center; padding: 0; }
    .intro-label {
      display: inline-block; font-size: 11px; font-weight: 700;
      letter-spacing: 2.5px; text-transform: uppercase; color: var(--accent); margin-bottom: 18px;
    }
    .intro-h2 { font-size: clamp(34px, 5.5vw, 64px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.1; }
    .intro-p {
      margin-top: 18px; font-size: 17px; color: var(--text-muted);
      max-width: 480px; margin-left: auto; margin-right: auto; line-height: 1.65;
    }

    /* ═══════════════════════════════════════════
       SCROLL DEMO
    ═══════════════════════════════════════════ */
    #scroll-demo { height: 620vh; position: relative; }
    .demo-sticky {
      position: sticky; top: 0; height: 100svh;
      display: grid; grid-template-columns: 48% 52%;
      align-items: center; padding: 0 80px; gap: 40px; overflow: hidden;
      background: #f2f2f4;
      transition: background 1s ease;
    }
    .demo-sticky.dark-stage { background: #000; }
    .callout-col { position: relative; height: 420px; }
    .callout-item {
      position: absolute; top: 50%; left: 0; width: 100%;
      opacity: 0; transform: translateY(calc(-50% + 28px));
      transition: opacity 0.45s ease, transform 0.45s ease; pointer-events: none;
    }
    .callout-item.active { opacity: 1; transform: translateY(-50%); }
    .callout-item.past   { opacity: 0; transform: translateY(calc(-50% - 28px)); }
    .ci-step {
      font-size: 13px; font-weight: 700; letter-spacing: 5px;
      text-transform: uppercase; color: var(--accent); margin-bottom: 22px;
      transition: opacity 0.5s ease; opacity: 0.4;
    }
    .callout-item.active .ci-step { opacity: 1; }
    .ci-title {
      font-size: clamp(36px, 4.2vw, 58px); font-weight: 800;
      letter-spacing: -3px; line-height: 1.07; white-space: pre-line;
      transition: color 0.6s ease;
    }
    .ci-desc {
      margin-top: 20px; font-size: 20px; line-height: 1.85; max-width: 480px;
      font-weight: 500;
      transition: color 0.9s ease 0.6s;
    }
    .ci-tags { display: flex; flex-direction: column; gap: 22px; margin-top: 28px; }
    .ci-tag-item { display: flex; flex-direction: column; gap: 9px; }
    .ci-feat-desc {
      font-size: 18px; line-height: 1.8; font-weight: 500; max-width: 480px;
      transition: color 0.9s ease 0.7s;
    }
    /* Demo light mode (default — no dark-stage) */
    .demo-sticky:not(.dark-stage) .ci-title { color: rgba(0,0,0,0.22); }
    .demo-sticky:not(.dark-stage) .callout-item.active .ci-title { color: rgba(0,0,0,0.88); text-shadow: none; animation: none; }
    .demo-sticky:not(.dark-stage) .ci-desc { color: rgba(0,0,0,0.12); }
    .demo-sticky:not(.dark-stage) .callout-item.active .ci-desc { color: rgba(0,0,0,0.8); }
    .demo-sticky:not(.dark-stage) .ci-feat-desc { color: rgba(0,0,0,0.12); }
    .demo-sticky:not(.dark-stage) .callout-item.active .ci-feat-desc { color: rgba(0,0,0,0.72); }
    /* Demo dark mode */
    .demo-sticky.dark-stage .ci-title { color: rgba(255,255,255,0.45); }
    .demo-sticky.dark-stage .callout-item.active .ci-title { animation: sTitleNeonIn 1s var(--ease-out) 0.2s both; }
    .demo-sticky.dark-stage .ci-desc { color: rgba(255,255,255,0.18); }
    .demo-sticky.dark-stage .callout-item.active .ci-desc { color: rgba(255,255,255,0.88); }
    .demo-sticky.dark-stage .ci-feat-desc { color: rgba(255,255,255,0.18); }
    .demo-sticky.dark-stage .callout-item.active .ci-feat-desc { color: rgba(255,255,255,0.68); }
    .phone-col { display: flex; justify-content: center; align-items: center; }
    .phone-wrap { position: relative; }
    .phone-aura {
      position: absolute; inset: -40px;
      background: radial-gradient(ellipse, rgba(124,92,252,0.18) 0%, transparent 68%);
      animation: aura 4s ease-in-out infinite alternate; pointer-events: none;
    }
    @keyframes aura { from { opacity:0.6; transform:scale(0.95); } to { opacity:1.0; transform:scale(1.05); } }
    .phone {
      position: relative; width: var(--phone-w); height: var(--phone-h);
      overflow: hidden;
      box-shadow:
        0 50px 120px rgba(0,0,0,0.85),
        0 0 80px rgba(124,92,252,0.12);
    }
    .phone-screen { width: 100%; height: 100%; overflow: hidden; position: relative; }
    .phone-island { display: none; }
    .phone-video {
      position: absolute;
      top: 50%; left: 50%;
      min-width: 100%; min-height: 100%;
      width: auto; height: auto;
      transform: translate(-50%, -50%);
      display: block;
    }
    #prog-dots {
      position: fixed; left: 28px; top: 50%; transform: translateY(-50%);
      z-index: 100; display: flex; flex-direction: column; gap: 10px;
      opacity: 0; transition: opacity 0.4s; pointer-events: none;
    }
    #prog-dots.on { opacity: 1; }
    .pdot { width: 6px; height: 6px; border-radius: 50%; background: rgba(255,255,255,0.2); transition: all 0.35s; }
    .pdot.lit { background: var(--accent); transform: scale(1.6); box-shadow: 0 0 8px var(--accent-glow); }
    #top-bar {
      position: fixed; top: 0; left: 0; height: 2px; width: 0%;
      background: linear-gradient(90deg, var(--accent), #a78bfa);
      z-index: 300; opacity: 0;
      transition: width 0.1s linear, opacity 0.3s;
    }
    #top-bar.on { opacity: 1; }

    /* ═══════════════════════════════════════════
       HOW IT WORKS
    ═══════════════════════════════════════════ */
    #how { padding: 0; max-width: none; margin: 0; }
    .how-header {
      text-align: center; padding: 130px 36px 80px;
      max-width: 900px; margin: 0 auto;
    }
    .section-sub {
      margin-top: 18px; font-size: 17px; color: var(--text-muted);
      max-width: 480px; margin-left: auto; margin-right: auto; line-height: 1.65;
    }
    .how-sticky-outer { height: 390vh; position: relative; }
    .how-sticky-inner {
      position: sticky; top: 0; height: 100svh;
      display: grid; grid-template-columns: 48% 52%;
      align-items: center; padding: 0 80px 0 160px;
      gap: 40px; overflow: hidden;
    }
    .how-section-label {
      position: absolute; top: 28px; left: 50%; transform: translateX(-50%);
      font-size: 11px; font-weight: 700; letter-spacing: 2.5px;
      text-transform: uppercase; color: var(--accent); white-space: nowrap;
      pointer-events: none;
    }
    .how-left { position: relative; height: 420px; }
    .how-step-panel {
      position: absolute; inset: 0;
      opacity: 0; pointer-events: none;
      transition: opacity 0.6s var(--ease-out);
    }
    .how-step-panel.active { opacity: 1; pointer-events: auto; }
    .how-right { display: flex; justify-content: center; align-items: center; }
    .step-num {
      font-size: 13px; font-weight: 700; letter-spacing: 5px;
      text-transform: uppercase; color: var(--accent); margin-bottom: 22px;
      opacity: 0.5; transition: opacity 0.5s ease;
    }
    .how-step-panel.active .step-num { opacity: 1; }
    .step-title {
      font-size: clamp(28px, 3.2vw, 46px); font-weight: 800;
      letter-spacing: -3px; line-height: 1.07; margin-bottom: 22px;
      color: rgba(255,255,255,0.4);
    }
    .how-step-panel.active .step-title { animation: sTitleNeonIn 1s var(--ease-out) 0.2s both; }
    .step-desc {
      font-size: 18px; line-height: 1.85; margin-bottom: 28px;
      color: rgba(255,255,255,0.18); font-weight: 500;
      transition: color 0.9s ease 0.5s;
    }
    .how-step-panel.active .step-desc { color: rgba(255,255,255,0.85); }
    .step-tags { display: flex; flex-wrap: wrap; gap: 8px; }
    .step-tag {
      display: inline-block;
      padding: 6px 16px; border-radius: 20px; font-size: 14px; font-weight: 700;
      background: rgba(124,92,252,0.12);
      border: 1px solid rgba(124,92,252,0.28);
      color: rgba(192,132,252,0.9); letter-spacing: 0.3px;
    }
    .step-phone-wrap { position: relative; }
    .step-phone-aura {
      position: absolute; inset: -50px;
      background: radial-gradient(ellipse, rgba(124,92,252,0.2) 0%, transparent 68%);
      animation: aura 4s ease-in-out infinite alternate; pointer-events: none;
    }
    .step-phone {
      position: relative; width: var(--phone-w); height: var(--phone-h);
      overflow: hidden;
      box-shadow:
        0 50px 120px rgba(0,0,0,0.9),
        0 0 120px rgba(124,92,252,0.35);
    }
    .step-phone video {
      position: absolute;
      top: 50%; left: 50%;
      min-width: 100%; min-height: 100%;
      width: auto; height: auto;
      transform: translate(-50%, -50%);
      display: block;
    }

    /* ═══════════════════════════════════════════
       FEATURE SPLITS
    ═══════════════════════════════════════════ */
    .split-section {
      padding: 80px 72px;
      display: grid; grid-template-columns: 1fr 1fr;
      gap: 80px; align-items: center;
      max-width: 1400px; margin: 0 auto;
    }
    .split-section.reverse .split-img  { order: 2; }
    .split-section.reverse .split-text { order: 1; }
    .split-img {
      border-radius: 28px; overflow: hidden;
      box-shadow: 0 40px 100px rgba(0,0,0,0.65);
      border: 1px solid var(--border-hi);
    }
    .split-img img { width: 100%; height: auto; display: block; }
    .split-text {}
    .split-label { font-size: 11px; font-weight: 700; letter-spacing: 2.5px; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; display: block; }
    .split-h2 { font-size: clamp(32px, 4vw, 52px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.15; margin-bottom: 20px; }
    .split-p { font-size: 16px; color: var(--text-muted); line-height: 1.8; margin-bottom: 28px; }
    .split-chips { display: flex; flex-wrap: wrap; gap: 8px; }
    .split-chip {
      padding: 7px 16px; border-radius: 20px; font-size: 12.5px; font-weight: 600;
      background: var(--surface2); border: 1px solid var(--border-hi); color: var(--text-muted);
    }

    /* ═══════════════════════════════════════════
       FEATURES GRID
    ═══════════════════════════════════════════ */
    #features {
      padding: 130px 36px 100px;
      max-width: 1200px; margin: 0 auto;
      position: relative;
    }
    #features::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 75%);
    }
    #features .section-intro { padding: 0; position: relative; z-index: 1; }
    .feat-grid {
      display: grid; grid-template-columns: repeat(3,1fr);
      gap: 1px; margin-top: 64px;
      border: 1px solid var(--border); border-radius: 20px; overflow: hidden;
      position: relative; z-index: 1;
    }
    .feat-card {
      background: rgba(12,12,20,0.98); border: none;
      padding: 44px 36px;
      position: relative; overflow: hidden;
      transition: background 0.4s;
    }
    .feat-card::before {
      content: ''; position: absolute; inset: 0;
      background: linear-gradient(135deg, rgba(124,92,252,0.07) 0%, rgba(0,122,255,0.03) 100%);
      opacity: 0; transition: opacity 0.4s;
    }
    .feat-card::after {
      content: ''; position: absolute; top: 0; left: 20%; right: 20%; height: 1px;
      background: linear-gradient(90deg, transparent, rgba(124,92,252,0.7), transparent);
      opacity: 0; transition: opacity 0.4s;
    }
    .feat-card:hover { background: rgba(18,14,30,0.99); }
    .feat-card:hover::before, .feat-card:hover::after { opacity: 1; }
    .feat-card.reveal.visible { animation: cellIn 0.7s var(--ease-out) both; opacity: 1; transform: none; }
    .feat-card.reveal.d1.visible { animation-delay: 0.08s; }
    .feat-card.reveal.d2.visible { animation-delay: 0.16s; }
    .feat-card.reveal.d3.visible { animation-delay: 0.24s; }
    .feat-card.reveal.d4.visible { animation-delay: 0.32s; }
    .feat-card.reveal.d5.visible { animation-delay: 0.40s; }
    .feat-icon {
      width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
      margin-bottom: 22px;
      transition: transform 0.4s var(--ease-spring);
    }
    .feat-card:hover .feat-icon { transform: scale(1.2) translateY(-4px); }
    .feat-icon svg { width: 22px; height: 22px; }
    .feat-title { font-size: 19px; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 12px; }
    .feat-desc { font-size: 15px; color: var(--text-muted); line-height: 1.78; }

    /* ═══════════════════════════════════════════
       APP GALLERY STRIP
    ═══════════════════════════════════════════ */
    #gallery {
      padding: 80px 0 100px;
      overflow: hidden;
    }
    .gallery-header {
      text-align: center; padding: 0 36px; margin-bottom: 52px;
    }
    .gallery-track {
      display: flex; gap: 16px;
      padding: 0 72px;
      overflow-x: auto;
      scroll-behavior: smooth;
      scrollbar-width: none;
      -ms-overflow-style: none;
      cursor: grab;
    }
    .gallery-track:active { cursor: grabbing; }
    .gallery-track::-webkit-scrollbar { display: none; }
    .gallery-card {
      flex-shrink: 0; width: 220px; height: 476px;
      border-radius: 24px; overflow: hidden;
      position: relative; background: #0a0812;
      box-shadow: 0 24px 60px rgba(0,0,0,0.55);
      transition: transform 0.5s var(--ease-out), box-shadow 0.5s;
    }
    .gallery-card:hover {
      transform: translateY(-12px) scale(1.02);
      box-shadow: 0 40px 90px rgba(0,0,0,0.7), 0 0 0 1px rgba(124,92,252,0.3);
    }
    .gallery-card img {
      width: 100%; height: 100%; object-fit: cover;
      transition: transform 0.8s var(--ease-out); pointer-events: none;
    }
    .gallery-card:hover img { transform: scale(1.06); }
    .gallery-overlay {
      position: absolute; bottom: 0; left: 0; right: 0;
      padding: 56px 18px 20px;
      background: linear-gradient(to top, rgba(0,0,0,0.88) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
      opacity: 0; transition: opacity 0.35s;
    }
    .gallery-card:hover .gallery-overlay { opacity: 1; }
    .gallery-overlay-name {
      font-size: 13px; font-weight: 700; letter-spacing: -0.2px;
    }

    /* ═══════════════════════════════════════════
       ACTIVITY SPLIT (extra visual)
    ═══════════════════════════════════════════ */
    #activity-split {
      padding: 40px 0 80px;
    }

    /* ═══════════════════════════════════════════
       INTERLUDE
    ═══════════════════════════════════════════ */
    .interlude {
      position: relative; padding: 130px 36px;
      text-align: center; overflow: hidden;
      background: var(--surface);
    }
    .interlude::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background-image: radial-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
      background-size: 36px 36px;
      mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 10%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 10%, transparent 75%);
    }
    .interlude-orb {
      position: absolute; width: 500px; height: 280px;
      left: 50%; top: 50%; transform: translate(-50%,-50%);
      background: radial-gradient(ellipse, rgba(124,92,252,0.1) 0%, transparent 70%);
      border-radius: 50%; pointer-events: none;
    }
    .interlude-text {
      position: relative; z-index: 1;
      font-size: clamp(26px, 3.8vw, 52px);
      font-weight: 700; letter-spacing: -0.04em; line-height: 1.3;
      color: rgba(255,255,255,0.85);
    }
    .interlude-text em {
      font-style: normal;
      background: linear-gradient(135deg, #c084fc 0%, #818cf8 50%, #60a5fa 100%);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }

    /* ═══════════════════════════════════════════
       Q&A
    ═══════════════════════════════════════════ */
    #qna {
      background: var(--bg);
      position: relative; overflow: hidden;
    }
    #qna::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background: radial-gradient(ellipse 70% 70% at 50% 50%, rgba(124,92,252,0.15) 0%, transparent 70%);
    }
    #qna::after {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background-image: radial-gradient(rgba(124,92,252,0.10) 1px, transparent 1px);
      background-size: 44px 44px;
      mask-image: radial-gradient(ellipse 65% 85% at 50% 50%, black 5%, transparent 72%);
      -webkit-mask-image: radial-gradient(ellipse 65% 85% at 50% 50%, black 5%, transparent 72%);
    }
    .qna-inner { position: relative; z-index: 1; text-align: center; max-width: 600px; margin: 0 auto; padding: 0 24px; }
    .qna-big {
      font-size: clamp(80px, 15vw, 160px); font-weight: 900;
      letter-spacing: -6px; line-height: 0.9;
      background: linear-gradient(165deg, #fff 30%, rgba(255,255,255,0.35));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
      margin: 16px 0 0;
    }
    .qna-deco { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 48px; }
    .qna-deco-line { width: 80px; height: 1px; background: var(--border); }
    .qna-deco-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 14px rgba(124,92,252,0.9); }
    .pres-badge {
      position: absolute; top: 28px; left: 40px;
      font-size: 10px; font-weight: 700; letter-spacing: 2.5px;
      text-transform: uppercase; color: rgba(255,255,255,0.18);
      font-family: 'Orbitron', sans-serif; pointer-events: none;
      z-index: 2;
    }

    /* ═══════════════════════════════════════════
       LIGHT SECTION THEME
    ═══════════════════════════════════════════ */
    .light-section {
      --text:       #111111;
      --text-muted: rgba(0,0,0,0.55);
      --text-dim:   rgba(0,0,0,0.32);
      --surface:    rgba(0,0,0,0.04);
      --surface2:   rgba(0,0,0,0.06);
      --border:     rgba(0,0,0,0.1);
      --border-hi:  rgba(0,0,0,0.16);
      --bg:         #f2f2f4;
      background: #f2f2f4 !important;
      color: var(--text);
    }
    .light-section .pres-badge { color: rgba(0,0,0,0.28); }
    .light-section .section-h2 { color: var(--text); }
    .light-section .section-sub { color: var(--text-muted); }
    .light-section .intro-h2 { color: var(--text); }
    .light-section .intro-p { color: var(--text-muted); }
    .light-section .intro-label { color: var(--accent); }
    /* prob-cards */
    .light-section .prob-card { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
    .light-section .prob-card:hover { background: rgba(0,0,0,0.055); }
    /* stack cards */
    .light-section .stack-card { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
    .light-section .stack-card:hover { background: rgba(0,0,0,0.055); }
    .light-section .stack-card-name { color: #111; }
    .light-section .stack-card-desc { color: rgba(0,0,0,0.6) !important; }
    .light-section .stack-card-icon { background: none !important; border: none !important; }
    .light-section .stack-card-logo { background: none !important; border: none !important; }
    .light-section .stack-mgmt-title { color: rgba(0,0,0,0.38); }
    .light-section .stack-mgmt-row { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
    .light-section .stack-mgmt-text { color: rgba(0,0,0,0.72); }
    .light-section .stack-mgmt-row div { color: rgba(0,0,0,0.45) !important; }
    .light-section .stack-mgmt-sub { color: rgba(0,0,0,0.5) !important; }
    /* challenge cards */
    .light-section .challenge-card { background: rgba(0,0,0,0.03); border-color: rgba(0,0,0,0.08); }
    .light-section .challenge-card:hover { background: rgba(0,0,0,0.055); }
    .light-section .challenge-title { color: #111; }
    .light-section .challenge-solve { color: rgba(0,0,0,0.65); }
    /* feat-cards (more-features) */
    .light-section .feat-card { background: rgba(0,0,0,0.03); border: 1px solid rgba(0,0,0,0.07); }
    .light-section .feat-card:hover { background: rgba(0,0,0,0.06); }
    .light-section .feat-title { color: #111; }
    .light-section .feat-desc { color: rgba(0,0,0,0.55); }
    /* comparison table light */
    .light-section table th { border-bottom-color: rgba(0,0,0,0.25) !important; color: rgba(0,0,0,0.7) !important; }
    #comp-body td:not(:first-child) { color: rgba(255,255,255,0.15); }
    .light-section #comp-body td:not(:first-child) { color: rgba(0,0,0,0.38); }
    .light-section #comp-body tr td:first-child { color: rgba(0,0,0,0.78) !important; font-weight: 500; }
    .light-section #comp-body tr { border-bottom-color: rgba(0,0,0,0.08) !important; }

    /* ═══════════════════════════════════════════
       FOOTER
    ═══════════════════════════════════════════ */
    footer {
      padding: 44px 36px; border-top: 1px solid var(--border);
      display: flex; align-items: center; justify-content: space-between; gap: 24px;
    }
    .footer-logo { display:flex; align-items:center; gap:9px; font-size:15px; font-weight:600; color:var(--text-muted); }
    .footer-meta { font-size: 13px; color: var(--text-dim); text-align: right; line-height: 1.7; }

    /* ═══════════════════════════════════════════
       SOCIAL SECTION (v1 style — two phone cards)
    ═══════════════════════════════════════════ */
    .social-section {
      padding: 100px 60px; overflow: hidden;
      background: linear-gradient(to bottom, var(--surface) 0%, var(--surface2) 100%);
    }
    .social-inner {
      max-width: 1160px; margin: 0 auto;
      display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
    }
    .social-phones {
      display: flex; gap: 16px; align-items: flex-end; justify-content: center;
    }
    .social-phone-card {
      border-radius: 24px; overflow: hidden; flex: 1; max-width: 240px;
      aspect-ratio: 9/19.5;
      box-shadow:
        0 0 0 1px rgba(124,92,252,0.22),
        0 32px 80px rgba(0,0,0,0.75),
        0 0 50px rgba(109,40,217,0.15);
      transition: transform 0.5s var(--ease-out);
    }
    .social-phone-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
    .social-phone-card:nth-child(1) { transform: rotate(-2.5deg) translateY(18px); }
    .social-phone-card:nth-child(2) { transform: rotate(1.5deg); }
    .social-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
    .social-chip {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 7px 14px; border-radius: 20px;
      background: rgba(124,92,252,0.1); border: 1px solid rgba(124,92,252,0.25);
      font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.75);
    }

    /* ═══════════════════════════════════════════
       SHOWCASE (v1 style — sticky phone + scroll)
    ═══════════════════════════════════════════ */
    .showcase-section {
      display: flex;
      background: linear-gradient(to bottom, var(--surface) 0%, var(--bg) 100%);
      position: relative;
    }
    .showcase-sticky-col {
      position: sticky; top: 0;
      width: 48%; height: 100vh; flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      padding: 80px 40px;
    }
    .showcase-phone-wrap {
      position: relative;
      width: min(380px, 38vw, calc((100vh - 180px) * 9 / 19.5));
      aspect-ratio: 9 / 19.5;
      filter:
        drop-shadow(0 40px 80px rgba(0,0,0,0.75))
        drop-shadow(0 0 60px rgba(124,92,252,0.22));
    }
    .showcase-phone-img {
      display: block; width: 100%; height: 100%;
      object-fit: cover; border-radius: 40px;
      border: 1px solid rgba(255,255,255,0.08);
    }
    .layer-a { position: absolute; inset: 0; }
    .layer-b {
      position: absolute; inset: 0; width: 100%; height: 100%;
      object-fit: cover; border-radius: 40px;
      opacity: 0;
      transition: opacity 1.4s cubic-bezier(0.4, 0, 0.2, 1);
      pointer-events: none;
    }
    .layer-b.visible { opacity: 1; }
    .showcase-text-col { flex: 1; }
    .s-slide {
      min-height: 100vh;
      display: flex; flex-direction: column; justify-content: center;
      padding: 80px 72px 80px 48px;
      opacity: 0.1; transform: translateY(22px);
      transition: opacity 0.65s ease, transform 0.65s var(--ease-out);
    }
    .s-slide.s-active { opacity: 1; transform: translateY(0); }
    .s-label {
      font-size: 13px; font-weight: 700; letter-spacing: 5px;
      text-transform: uppercase; color: var(--accent); margin-bottom: 22px;
    }
    .s-title {
      font-size: clamp(38px, 4vw, 62px);
      font-weight: 800; letter-spacing: -3px; line-height: 1.07;
      margin-bottom: 22px;
      color: rgba(255,255,255,0.5); text-shadow: none;
    }
    .s-slide.s-active .s-title { animation: sTitleNeonIn 1s var(--ease-out) 0.35s both; }
    .s-body {
      font-size: 20px; line-height: 1.85;
      color: rgba(255,255,255,0.18); font-weight: 500;
      max-width: 480px;
      transition: color 0.9s ease 0.7s;
    }
    .s-slide.s-active .s-body {
      color: rgba(255,255,255,0.88);
    }
    .s-features { display: flex; flex-direction: column; gap: 22px; margin-top: 28px; }
    .s-feature  { display: flex; flex-direction: column; gap: 9px; }
    .s-tag {
      display: inline-block; align-self: flex-start;
      font-size: 14px; font-weight: 700;
      padding: 6px 16px; border-radius: 20px;
      background: rgba(124,92,252,0.12);
      border: 1px solid rgba(124,92,252,0.28);
      color: rgba(192,132,252,0.9); letter-spacing: 0.3px;
    }
    .s-feat-desc {
      font-size: 18px; line-height: 1.8;
      color: rgba(255,255,255,0.18); font-weight: 500; max-width: 480px;
      transition: color 0.9s ease 0.7s;
    }
    .s-slide.s-active .s-feat-desc { color: rgba(255,255,255,0.68); }
    @media (max-width: 900px) {
      .showcase-section { flex-direction: column; }
      .showcase-sticky-col { position: relative; width: 100%; height: auto; padding: 60px 24px 0; }
      .showcase-phone-wrap { width: min(220px, 55vw); margin: 0 auto; }
      .s-slide { min-height: auto; padding: 48px 24px; opacity: 1 !important; transform: none !important; }
    }

    /* ═══════════════════════════════════════════
       EMOTION SECTION (legacy — unused, kept for compat)
    ═══════════════════════════════════════════ */
    .emotion-section { display: none; }
    .emotion-inner { display: none; }
    .emotion-cards { display: none; }
    .emotion-card {
      background: rgba(255,255,255,0.04); border: 1px solid var(--border);
      border-radius: 14px; padding: 28px 22px;
      position: relative; overflow: hidden;
      transition: transform 0.3s var(--ease-out), background 0.3s, border-color 0.3s, box-shadow 0.3s;
    }
    .emotion-card:hover {
      transform: translateY(-6px);
      background: rgba(124,92,252,0.09);
      border-color: rgba(124,92,252,0.3);
      box-shadow: 0 20px 50px rgba(124,92,252,0.12);
    }
    .ec-icon { width: 44px; height: 44px; margin-bottom: 14px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(255,255,255,0.05); transition: transform 0.3s var(--ease-spring); }
    .emotion-card:hover .ec-icon { transform: scale(1.15) translateY(-3px); }
    .ec-label { font-size: 14px; font-weight: 600; color: rgba(255,255,255,0.8); margin-bottom: 4px; }
    .ec-sub { font-size: 12px; color: var(--text-dim); }
    .intensity-wrap { margin-top: 36px; }
    .intensity-label { font-size: 11px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; color: var(--text-dim); margin-bottom: 16px; }
    .intensity-dots { display: flex; gap: 8px; }
    .i-dot { flex: 1; height: 6px; border-radius: 3px; background: rgba(255,255,255,0.08); transition: background 0.3s; }
    .i-dot.active { background: linear-gradient(90deg, var(--accent), #60a5fa); }

    /* ═══════════════════════════════════════════
       COLLECTION / BADGE SECTION
    ═══════════════════════════════════════════ */
    .badge-section {
      padding: 130px 36px 120px;
      background: var(--bg);
      text-align: center; overflow: hidden;
      position: relative;
    }
    .badge-section::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 75%);
    }
    .badge-inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 1; }
    .progression {
      margin-top: 72px;
      display: flex; align-items: flex-start; justify-content: center;
    }
    .prog-step { display: flex; flex-direction: column; align-items: center; }
    .prog-row { display: flex; align-items: center; }
    .prog-dot {
      width: 48px; height: 48px; border-radius: 50%;
      background: linear-gradient(135deg, var(--accent), #60a5fa);
      display: flex; align-items: center; justify-content: center; flex-shrink: 0;
      color: #fff; font-size: 18px;
      box-shadow: 0 0 0 1px rgba(124,92,252,0.4), 0 0 30px rgba(124,92,252,0.4);
      transition: transform 0.3s var(--ease-spring), box-shadow 0.3s; cursor: default;
    }
    .prog-dot:hover {
      transform: scale(1.2) translateY(-5px);
      box-shadow: 0 0 0 2px rgba(124,92,252,0.6), 0 0 50px rgba(124,92,252,0.6);
    }
    .prog-line { flex: 1; height: 1px; min-width: 28px; max-width: 80px; background: linear-gradient(90deg, rgba(124,92,252,0.5), rgba(0,122,255,0.5)); }
    .prog-spacer { flex: 1; height: 1px; max-width: 8px; }
    .prog-info { margin-top: 12px; text-align: center; }
    .prog-name { font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.8); }
    .prog-req { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
    .badge-grid {
      margin-top: 72px;
      display: grid; grid-template-columns: repeat(4,1fr);
      gap: 1px;
      border: 1px solid var(--border); border-radius: 20px; overflow: hidden;
      position: relative; z-index: 1;
    }
    .b-item {
      background: rgba(12,12,20,0.98); border: none;
      border-radius: 0; padding: 36px 24px 28px;
      position: relative; overflow: hidden;
      transition: background 0.4s;
      cursor: default;
    }
    .b-item::before {
      content: ''; position: absolute; inset: 0;
      background: linear-gradient(135deg, rgba(124,92,252,0.07) 0%, rgba(0,122,255,0.03) 100%);
      opacity: 0; transition: opacity 0.4s;
    }
    .b-item::after {
      content: ''; position: absolute; top: 0; left: 20%; right: 20%; height: 1px;
      background: linear-gradient(90deg, transparent, rgba(124,92,252,0.7), transparent);
      opacity: 0; transition: opacity 0.4s;
    }
    .b-item:hover { background: rgba(18,14,30,0.99); }
    .b-item:hover::before, .b-item:hover::after { opacity: 1; }
    .b-icon { width: 44px; height: 44px; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(255,255,255,0.05); transition: transform 0.4s var(--ease-spring); }
    .b-item:hover .b-icon { transform: scale(1.2) translateY(-4px); }
    .b-name { font-size: 15px; font-weight: 700; color: rgba(255,255,255,0.82); letter-spacing: -0.02em; }
    .badge-grid.reveal.visible .b-item { animation: popIn 0.5s var(--ease-out) both; }
    .badge-grid.reveal.visible .b-item:nth-child(1)  { animation-delay: 0.04s; }
    .badge-grid.reveal.visible .b-item:nth-child(2)  { animation-delay: 0.09s; }
    .badge-grid.reveal.visible .b-item:nth-child(3)  { animation-delay: 0.14s; }
    .badge-grid.reveal.visible .b-item:nth-child(4)  { animation-delay: 0.19s; }
    .badge-grid.reveal.visible .b-item:nth-child(5)  { animation-delay: 0.24s; }
    .badge-grid.reveal.visible .b-item:nth-child(6)  { animation-delay: 0.29s; }
    .badge-grid.reveal.visible .b-item:nth-child(7)  { animation-delay: 0.34s; }
    .badge-grid.reveal.visible .b-item:nth-child(8)  { animation-delay: 0.39s; }
    .badge-grid.reveal.visible .b-item:nth-child(9)  { animation-delay: 0.44s; }
    .badge-grid.reveal.visible .b-item:nth-child(10) { animation-delay: 0.49s; }
    .badge-grid.reveal.visible .b-item:nth-child(11) { animation-delay: 0.54s; }
    .badge-grid.reveal.visible .b-item:nth-child(12) { animation-delay: 0.59s; }

    /* ═══════════════════════════════════════════
       ROUTE SECTION (parallax background)
    ═══════════════════════════════════════════ */
    .route-section {
      position: relative; min-height: 680px; display: flex; align-items: center; overflow: hidden;
    }
    .route-bg {
      position: absolute; inset: 0;
      background-color: #06030f;
      background-image: url('assets/images/map_route.png');
      background-size: cover; background-position: center top;
      filter: brightness(0.14) saturate(1.8) hue-rotate(220deg);
      transform: scale(1.15);
      transform-origin: center center;
      will-change: transform;
    }
    .route-section::after {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background:
        linear-gradient(to right, rgba(0,0,0,0.98) 0%, transparent 50%),
        linear-gradient(to bottom, rgba(0,0,0,0.5) 0%, transparent 20%, transparent 80%, rgba(0,0,0,0.5) 100%);
    }
    .route-overlay {
      position: absolute; inset: 0;
      background:
        linear-gradient(110deg, rgba(0,0,0,0.96) 0%, rgba(0,0,0,0.78) 42%, rgba(0,0,0,0.04) 100%),
        linear-gradient(to right, rgba(8,4,20,0.6) 0%, transparent 55%);
    }
    .route-content {
      position: relative; z-index: 2; padding: 80px 110px; max-width: 620px;
    }
    .route-content .section-h2 { margin: 18px 0 26px; }

    /* ═══════════════════════════════════════════
       STACK SECTION (v1 two-column layout)
    ═══════════════════════════════════════════ */
    .stack-section {
      padding: 100px 60px 100px;
      background: var(--bg); position: relative; overflow: hidden;
    }
    .stack-section::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background: radial-gradient(ellipse 60% 50% at 100% 50%, rgba(0,122,255,0.06) 0%, transparent 70%);
    }
    .stack-inner {
      max-width: 1440px; margin: 0 auto;
      display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start;
      position: relative; z-index: 1;
    }
    .stack-header { grid-column: 1/-1; margin-bottom: 8px; }
    /* 2×2 grid for stack cards */
    .stack-cards {
      display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
    }
    .stack-card {
      background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
      border-radius: 20px; padding: 32px 28px;
      display: flex; flex-direction: column; align-items: flex-start; gap: 20px;
      position: relative; overflow: hidden;
      transition: background 0.25s, border-color 0.25s, transform 0.25s;
    }
    .stack-card:hover {
      background: rgba(255,255,255,0.055); border-color: rgba(124,92,252,0.3);
      transform: translateY(-4px);
    }
    .stack-card-icon {
      flex-shrink: 0;
      display: flex; align-items: center;
      height: 64px;
    }
    .stack-card-icon img { max-height: 56px; max-width: 120px; object-fit: contain; display: block; }
    .stack-card-logo {
      flex-shrink: 0;
      display: flex; align-items: center;
      height: 72px;
    }
    .stack-card-logo img { max-height: 56px; max-width: 220px; object-fit: contain; display: block; }
    .stack-card-name { display: none; }
    .stack-card-desc { font-size: 16px; color: rgba(255,255,255,0.7); line-height: 1.7; font-weight: 500; }
    .stack-card-why {
      margin-top: 10px; font-size: 14px; color: #c084fc;
      background: rgba(192,132,252,0.1); border-radius: 8px;
      padding: 8px 14px; display: block; letter-spacing: 0.1px; font-weight: 600;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    }
    .stack-mgmt { display: flex; flex-direction: column; gap: 20px; justify-content: center; }
    .stack-mgmt-title {
      font-size: 13px; font-weight: 700; color: rgba(255,255,255,0.35);
      letter-spacing: 2px; text-transform: uppercase; margin-bottom: 4px;
    }
    .stack-mgmt-row {
      background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
      border-radius: 16px; padding: 26px 28px;
      display: flex; align-items: center; gap: 18px;
    }
    .stack-mgmt-dot {
      width: 12px; height: 12px; border-radius: 50%; background: #c084fc; flex-shrink: 0;
      box-shadow: 0 0 10px rgba(192,132,252,0.7);
    }
    .stack-mgmt-text { font-size: 18px; color: rgba(255,255,255,0.85); font-weight: 700; }
    .stack-mgmt-sub { font-size: 15px; color: rgba(255,255,255,0.5); margin-top: 5px; line-height: 1.6; }

    /* ═══════════════════════════════════════════
       CHALLENGES SECTION (v1 terminal style)
    ═══════════════════════════════════════════ */
    .challenge-card {
      background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
      border-radius: 20px; padding: 32px;
      display: flex; flex-direction: column; gap: 20px;
      position: relative; overflow: hidden;
      transition: background 0.25s, border-color 0.25s, transform 0.3s var(--ease-out);
    }
    .challenge-card:hover {
      background: rgba(255,255,255,0.05); border-color: rgba(124,92,252,0.25);
      transform: translateY(-6px);
    }
    .challenge-num { font-size: 12px; font-weight: 800; letter-spacing: 3px; color: rgba(124,92,252,0.7); text-transform: uppercase; }
    .challenge-title { font-size: 22px; font-weight: 700; line-height: 1.35; letter-spacing: -0.5px; }
    .challenge-terminal { background: #0d0d10; border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; overflow: hidden; }
    .c-term-header {
      display: flex; align-items: center; gap: 7px; padding: 10px 14px;
      background: #161619; border-bottom: 1px solid rgba(255,255,255,0.07);
    }
    .c-dot { width: 11px; height: 11px; border-radius: 50%; flex-shrink: 0; }
    .c-dot.red    { background: #ff5f57; }
    .c-dot.yellow { background: #febc2e; }
    .c-dot.green  { background: #28c840; }
    .c-term-label { font-size: 11px; color: rgba(255,255,255,0.3); margin-left: auto; letter-spacing: 0.3px; font-family: monospace; }
    .c-term-body {
      padding: 14px 16px; display: flex; flex-direction: column; gap: 5px;
      font-family: 'SF Mono', 'Fira Code', monospace; font-size: 12px; line-height: 1.7;
    }
    .c-line      { color: rgba(255,255,255,0.7); }
    .c-line.dim  { color: rgba(255,255,255,0.3); }
    .c-line.err  { color: #ff6b6b; }
    .challenge-solve-label { font-size: 11px; font-weight: 700; letter-spacing: 2px; color: #c084fc; text-transform: uppercase; margin-bottom: 6px; }
    .challenge-solve {
      font-size: 13px; line-height: 1.75; color: rgba(255,255,255,0.65);
      padding-left: 14px; border-left: 2px solid rgba(124,92,252,0.5);
    }
    .challenge-solve code { font-family: 'SF Mono','Fira Code',monospace; font-size: 11px; color: #c084fc; }

    /* ═══════════════════════════════════════════
       TEAM SECTION (v1 style)
    ═══════════════════════════════════════════ */
    .team-section {
      padding: 140px 24px 120px; background: var(--surface);
      position: relative; overflow: hidden;
    }
    .team-section::before {
      content: ''; position: absolute; inset: 0; pointer-events: none;
      background: radial-gradient(ellipse 60% 50% at 30% 50%, rgba(124,92,252,0.07) 0%, transparent 70%);
    }
    .team-inner { max-width: 1000px; margin: 0 auto; position: relative; z-index: 1; }
    .team-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: 64px; }
    .team-card {
      background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
      border-radius: 20px; padding: 28px 24px;
      display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center;
      transition: background 0.25s, border-color 0.25s, transform 0.3s var(--ease-out);
      position: relative; overflow: hidden;
    }
    .team-card:hover {
      background: rgba(255,255,255,0.055); border-color: rgba(124,92,252,0.25);
      transform: translateY(-6px);
    }
    .team-avatar {
      width: 56px; height: 56px; border-radius: 50%;
      background: linear-gradient(135deg, #8b5cf6, #3b82f6);
      display: flex; align-items: center; justify-content: center;
      font-size: 22px; font-weight: 800; color: #fff;
      box-shadow: 0 0 24px rgba(124,92,252,0.3);
    }
    .team-name { font-size: 16px; font-weight: 700; letter-spacing: -0.2px; }
    .team-role { font-size: 12px; color: rgba(255,255,255,0.45); line-height: 1.5; }
    .team-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-top: 4px; }
    .team-tag {
      font-size: 10px; font-weight: 600; padding: 4px 10px; border-radius: 20px;
      background: rgba(124,92,252,0.1); border: 1px solid rgba(124,92,252,0.2); color: #c084fc; letter-spacing: 0.2px;
    }

    /* ═══════════════════════════════════════════
       RESPONSIVE
    ═══════════════════════════════════════════ */
    @media (max-width: 1100px) {
      .split-section { padding: 60px 36px; gap: 50px; }
    }
    @media (max-width: 900px) {
      :root { --phone-w: 280px; --phone-h: 573px; }
      .demo-sticky { grid-template-columns: 1fr; grid-template-rows: 1fr auto; padding: 80px 28px 32px; gap: 28px; }
      .phone-col { order: -1; }
      .callout-col { height: 200px; }
      .ci-desc { max-width: 100%; }
      .feat-grid { grid-template-columns: repeat(2,1fr); }
      #prog-dots { display: none; }
      .problem-grid { grid-template-columns: 1fr; }
      .how-sticky-inner { grid-template-columns: 1fr; grid-template-rows: auto 1fr; padding: 24px 28px 28px; gap: 24px; }
      .how-right { order: -1; }
      .how-left { height: 220px; }
      .split-section { grid-template-columns: 1fr; gap: 40px; }
      .split-section.reverse .split-img  { order: unset; }
      .split-section.reverse .split-text { order: unset; }
      .nav-links { display: none; }
    }
    @media (max-width: 900px) {
      .social-inner { grid-template-columns: 1fr; gap: 48px; }
      .social-phones { justify-content: center; }
      .social-phone-card { max-width: 160px; }
      .emotion-inner { grid-template-columns: 1fr; gap: 48px; }
      .emotion-section { padding: 80px 20px; }
      .badge-section { padding: 80px 20px; }
      .badge-grid { grid-template-columns: repeat(2,1fr); }
      .progression { flex-direction: column; align-items: center; gap: 24px; }
      .prog-row { flex-direction: column; align-items: center; gap: 8px; }
      .prog-line { width: 1px; height: 28px; min-width: unset; max-width: unset; }
      .stack-inner { grid-template-columns: 1fr; gap: 40px; }
      .stack-cards { grid-template-columns: 1fr; }
      .team-grid { grid-template-columns: 1fr 1fr; }
      .route-content { padding: 60px 24px; }
    }
    @media (max-width: 600px) {
      :root { --phone-w: 220px; --phone-h: 450px; }
      .feat-grid { grid-template-columns: 1fr; }
      footer { flex-direction: column; text-align: center; }
      .footer-meta { text-align: center; }
      #features { padding: 80px 20px 70px; }
      .how-sticky-outer { height: 320vh; }
      .how-sticky-inner { padding: 16px 20px 20px; }
      .gallery-card { width: 160px; }
      .badge-grid { grid-template-columns: repeat(2,1fr); }
      .emotion-cards { grid-template-columns: 1fr 1fr; }
      .team-grid { grid-template-columns: 1fr; }
      .social-section { padding: 80px 20px; }
    }
    @media (min-width: 1400px) {
      :root { --phone-w: 460px; --phone-h: 942px; }
      .demo-sticky { padding: 0 120px !important; }
    }

    /* ═══════════════════════════════════════════
       SCROLL SNAP — PRESENTATION
    ═══════════════════════════════════════════ */
    html { scroll-snap-type: y mandatory; }

    section,
    .split-section,
    .showcase-section,
    footer { scroll-snap-align: start; }

    #problem, #comparison,
    .stack-section,
    #challenges,
    #more-features,
    .team-section,
    #qna { min-height: 100svh !important; }

    #problem,
    #comparison,
    .stack-section,
    #challenges,
    #more-features,
    .team-section,
    #qna {
      display: flex;
      flex-direction: column;
      justify-content: center;
      position: relative;
    }