/* ============ Option C — Control Room ============ */
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  :root { --glow: 1.4; --sect-pad: 150px; --col: 1180px; --grad-radar: linear-gradient(105deg, #5EEBFF 0%, #19A6F0 58%, #0B6FA8 100%); }
  html[data-density="compact"] { --sect-pad: 92px; }
  html[data-accent="cyan"]   { --accent:#2BE5FF; --accent-hover:#6FF0FF; --accent-press:#19C9E8; --accent-fill:rgba(43,229,255,.12); --accent-ring:rgba(43,229,255,.30); --grad-radar: linear-gradient(105deg, #8FF5FF 0%, #2BE5FF 50%, #19A6F0 100%); }
  html[data-accent="mint"]   { --accent:#2BD9A8; --accent-hover:#56E5BD; --accent-press:#1FBF92; --accent-fill:rgba(43,217,168,.12); --accent-ring:rgba(43,217,168,.30); --grad-radar: linear-gradient(105deg, #7FF7D4 0%, #2BD9A8 55%, #19A6F0 100%); }
  /* no purple/violet anywhere on the site */
  :root { --status-vendor: var(--sys-gray-d); }
  :root.theme-light { --status-vendor: var(--sys-gray-l); }

  body {
    font-family: var(--font-sans);
    background: var(--bg-sunken); color: var(--fg);
    font-size: var(--fs-body); line-height: var(--lh-relaxed);
    -webkit-font-smoothing: antialiased;
    transition: background var(--dur-slow) var(--ease-standard), color var(--dur-slow) var(--ease-standard);
  }
  html.theme-light body { background: var(--bg); }
  .dotfield {
    position: fixed; inset: 0; pointer-events: none; z-index: 0;
    background-image: radial-gradient(color-mix(in srgb, var(--accent) 22%, transparent) 1px, transparent 1.4px);
    background-size: 28px 28px;
    -webkit-mask: radial-gradient(ellipse 100% 60% at 50% 0%, black, transparent 75%);
    mask: radial-gradient(ellipse 100% 60% at 50% 0%, black, transparent 75%);
    opacity: calc(.5 * var(--glow));
  }
  main, header, footer { position: relative; z-index: 1; }
  a { color: inherit; text-decoration: none; }
  img { display: block; }
  .col { max-width: var(--col); margin: 0 auto; padding: 0 36px; }
  section { padding-top: var(--sect-pad); }
  .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
  .label { font-family: var(--font-mono); font-size: 14px; font-weight: 500; text-transform: uppercase; letter-spacing: .18em; color: var(--accent); display: inline-flex; align-items: center; gap: 12px; margin-bottom: 22px; }
  .label::before { content: ""; width: 9px; height: 9px; border: 1.5px solid var(--accent); transform: rotate(45deg); }
  .h2 { font-size: clamp(42px, 5.4vw, 68px); line-height: 1.04; letter-spacing: var(--tracking-tight); font-weight: 700; color: var(--fg-strong); text-wrap: balance; max-width: 16em; }
  .lede { margin-top: 24px; font-size: 20px; color: var(--fg-2); max-width: 34em; text-wrap: pretty; }

  .rv { transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
  .rv-pre { opacity: 0; transform: translateY(18px); }
  .rv.d1 { transition-delay: .08s; } .rv.d2 { transition-delay: .16s; } .rv.d3 { transition-delay: .24s; }
  @media (prefers-reduced-motion: reduce) { .rv { transition: none; } }

  /* ============ nav ============ */
  .nav { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(20px) saturate(1.5); -webkit-backdrop-filter: blur(20px) saturate(1.5); background: color-mix(in srgb, var(--bg-sunken) 68%, transparent); border-bottom: 1px solid var(--divider); }
  html.theme-light .nav { background: color-mix(in srgb, var(--bg) 78%, transparent); }
  .nav-in { display: flex; align-items: center; gap: 28px; height: 60px; }
  .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--fg-strong); }
  .brand img { width: 26px; height: 26px; border-radius: 23%; box-shadow: 0 0 16px var(--accent-ring); }
  .brand b { background: var(--grad-radar); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .nav-links { display: flex; gap: 2px; margin-left: auto; }
  .nav-links a { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--fg-2); padding: 8px 12px; border-radius: var(--r-xs); transition: all var(--dur-fast); white-space: nowrap; }
  .nav-links a:hover { color: var(--accent); background: var(--accent-fill); }
  .nav-cta { display: flex; align-items: center; gap: 10px; }
  .theme-btn { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--border); background: transparent; color: var(--fg-2); border-radius: var(--r-sm); cursor: pointer; transition: all var(--dur-fast); }
  .theme-btn:hover { color: var(--accent); border-color: var(--accent); }
  .theme-btn .moon { display: none; }
  html.theme-light .theme-btn .sun { display: none; }
  html.theme-light .theme-btn .moon { display: block; }

  .btn { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; padding: 10px 18px; border-radius: var(--r-sm); cursor: pointer; border: none; transition: all var(--dur-base) var(--ease-standard); }
  .btn:active { transform: scale(.98); }
  .btn-primary { background: var(--accent); color: var(--fg-on-accent); box-shadow: 0 0 calc(var(--glow) * 28px) var(--accent-ring); }
  .btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 0 3px var(--accent-ring), 0 0 calc(var(--glow) * 36px) var(--accent-ring); }
  .btn-ghost { background: transparent; color: var(--fg); border: 1px solid var(--border-strong); }
  .btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-fill); }
  .btn-lg { font-size: 16px; padding: 14px 28px; border-radius: 10px; }

  /* ============ hero ============ */
  .hero { position: relative; padding: 110px 0 0; overflow: hidden; }
  .hero-field { position: absolute; left: 50%; top: -520px; transform: translateX(-50%); width: 1500px; height: 1500px; pointer-events: none; }
  .hero-field .ring { position: absolute; border-radius: 50%; border: 1px solid color-mix(in srgb, var(--accent) 16%, transparent); }
  .hero-field .f1 { inset: 0; } .hero-field .f2 { inset: 12%; } .hero-field .f3 { inset: 24%; } .hero-field .f4 { inset: 36%; }
  .hero-field .sweep { position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(from 0deg, transparent 0deg, transparent 296deg, color-mix(in srgb, var(--accent) 22%, transparent) 350deg, color-mix(in srgb, var(--accent) 46%, transparent) 360deg); -webkit-mask: radial-gradient(circle, black 0%, black 50%, transparent 64%); mask: radial-gradient(circle, black 0%, black 50%, transparent 64%); animation: sweepC 11s linear infinite; opacity: calc(.7 * var(--glow)); }
  @keyframes sweepC { to { transform: rotate(360deg); } }
  @media (prefers-reduced-motion: reduce) { .hero-field .sweep { animation: none; } }

  .hero-inner { position: relative; text-align: center; }
  .hero h1 { font-size: clamp(46px, 6.4vw, 88px); line-height: 1.0; letter-spacing: -0.028em; font-weight: 700; color: var(--fg-strong); text-wrap: balance; max-width: 13em; margin: 0 auto; }
  .hero h1 em { font-style: normal; background: var(--grad-radar); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero-sub { margin: 28px auto 0; font-size: 20px; line-height: 1.65; color: var(--fg-2); max-width: 34em; text-wrap: pretty; }
  .hero-ctas { display: flex; gap: 14px; margin-top: 38px; justify-content: center; }
  .ticker { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 0; margin-top: 44px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .1em; color: var(--fg-3); }
  .ticker span { padding: 0 18px; border-right: 1px solid var(--border); white-space: nowrap; }
  .ticker span:last-child { border-right: none; }
  .ticker b { color: var(--accent); font-weight: 500; }

  /* hero variants */
  html[data-hero="split"] .hero-inner { text-align: left; display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
  html[data-hero="split"] .hero h1 { margin: 0; }
  html[data-hero="split"] .hero-sub { margin: 26px 0 0; }
  html[data-hero="split"] .hero-ctas, html[data-hero="split"] .ticker { justify-content: flex-start; }
  html[data-hero="split"] .winwrap { margin-top: 0; }
  html[data-hero="hud"] .hero { padding-bottom: 90px; }
  html[data-hero="hud"] .hero h1 { font-size: clamp(52px, 7.6vw, 110px); }

  /* window */
  .winwrap { position: relative; margin: 76px auto 0; max-width: 920px; perspective: 1400px; }
  .macwin { position: relative; border-radius: var(--r-lg); overflow: hidden; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(6px); box-shadow: 0 40px 90px -20px rgba(0,0,0,.65), 0 0 calc(var(--glow) * 80px) -10px var(--accent-ring), var(--inset-hairline); border: 1px solid color-mix(in srgb, var(--accent) 24%, var(--border)); font-size: 12px; transform: rotateX(7deg); transform-origin: top center; transition: transform .9s var(--ease-out); }
  .winwrap:hover .macwin { transform: rotateX(0deg); }
  html.theme-light .macwin { box-shadow: var(--shadow-lg), 0 0 calc(var(--glow) * 60px) -10px var(--accent-ring); }
  .win-toolbar { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: color-mix(in srgb, var(--surface-2) 85%, transparent); border-bottom: 1px solid var(--divider); }
  .lights { display: flex; gap: 7px; }
  .lights i { width: 11px; height: 11px; border-radius: 50%; }
  .lights i:nth-child(1) { background: #FF5F57; } .lights i:nth-child(2) { background: #FEBC2E; } .lights i:nth-child(3) { background: #28C840; }
  .win-title { font-weight: 600; font-size: 12px; color: var(--fg-2); }
  .win-scan { margin-left: auto; display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 10.5px; color: var(--accent); }
  .win-scan i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulseC 2s var(--ease-standard) infinite; }
  @keyframes pulseC { 0%,100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-ring); } 50% { opacity: .6; box-shadow: 0 0 0 5px transparent; } }
  .win-video { width: 100%; display: block; aspect-ratio: 16/10; object-fit: cover; background: var(--bg-sunken); }
  .win-body { display: grid; grid-template-columns: 150px 1fr; min-height: 330px; }
  .win-side { background: color-mix(in srgb, var(--bg-sunken) 62%, transparent); border-right: 1px solid var(--divider); padding: 12px 8px; }
  .side-label { font-family: var(--font-mono); font-size: 9.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--fg-3); padding: 4px 8px 6px; display: block; }
  .side-item { display: flex; align-items: center; justify-content: space-between; padding: 5.5px 8px; border-radius: 6px; color: var(--fg-2); font-weight: 500; font-size: 11.5px; }
  .side-item.sel { background: var(--accent-fill); color: var(--accent); }
  .side-item .n { font-family: var(--font-mono); font-size: 10px; color: var(--fg-3); }
  .side-item.sel .n { color: var(--accent); }
  .row { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto auto; gap: 8px; align-items: center; padding: 8.5px 12px; border-bottom: 1px solid var(--divider); }
  .row > span:nth-child(2) { min-width: 0; overflow: hidden; }
  .row .ic { width: 22px; height: 22px; border-radius: 6px; display: grid; place-items: center; font-size: 10px; font-weight: 700; color: #fff; }
  .row .nm { font-weight: 600; font-size: 12px; color: var(--fg); line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
  .row .src { font-size: 10px; color: var(--fg-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
  .row .ver { font-family: var(--font-mono); font-size: 10px; color: var(--fg-3); white-space: nowrap; }
  .pill { display: inline-flex; align-items: center; gap: 5px; font-size: 10px; font-weight: 600; padding: 2.5px 8px; border-radius: var(--r-pill); white-space: nowrap; }
  .pill i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
  .pill.ok { color: var(--status-current); background: color-mix(in srgb, var(--status-current) 13%, transparent); }
  .pill.up { color: var(--status-update); background: color-mix(in srgb, var(--status-update) 13%, transparent); }
  .pill.as { color: var(--status-appstore); background: color-mix(in srgb, var(--status-appstore) 13%, transparent); }
  .pill.vn { color: var(--status-vendor); background: color-mix(in srgb, var(--status-vendor) 13%, transparent); }

  /* ============ problem panel ============ */
  .panel { background: color-mix(in srgb, var(--surface) 80%, transparent); border: 1px solid var(--border); border-radius: var(--r-xl); box-shadow: var(--inset-hairline); }
  .prob-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 56px; }
  .prob { padding: 34px 36px; }
  .prob h3 { font-size: 24px; font-weight: 600; color: var(--fg-strong); margin-bottom: 22px; display: flex; align-items: center; gap: 12px; }
  .prob h3 .st { font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; padding: 4px 11px; border-radius: var(--r-pill); }
  .prob.bad h3 .st { color: var(--status-update); background: color-mix(in srgb, var(--status-update) 14%, transparent); }
  .prob.good { border-color: color-mix(in srgb, var(--accent) 38%, var(--border)); box-shadow: var(--inset-hairline), 0 0 calc(var(--glow) * 48px) -16px var(--accent-ring); }
  .prob.good h3 .st { color: var(--accent); background: var(--accent-fill); }
  .prob ul { list-style: none; display: flex; flex-direction: column; gap: 15px; }
  .prob li { display: flex; gap: 14px; font-size: 16.5px; color: var(--fg-2); line-height: 1.55; }
  .prob li::before { content: ""; flex: none; width: 7px; height: 7px; margin-top: 9px; background: var(--fg-disabled); transform: rotate(45deg); }
  .prob.good li::before { background: var(--accent); }

  /* ============ logo ribbon (horizontal scroll, icons only) ============ */
  .logogrid { display: flex; align-items: center; gap: 44px; margin-top: 56px; overflow-x: auto; overflow-y: visible; padding: 10px 2px 16px; scrollbar-width: none; -webkit-mask: linear-gradient(to right, transparent, black 56px, black calc(100% - 56px), transparent); mask: linear-gradient(to right, transparent, black 56px, black calc(100% - 56px), transparent); }
  .logogrid::-webkit-scrollbar { display: none; }
  .licon { flex: none; display: block; }
  .licon img { width: 52px; height: 52px; object-fit: contain; display: block; filter: saturate(.92); transition: transform var(--dur-base) var(--ease-standard), filter var(--dur-base) var(--ease-standard); }
  .licon:hover img { transform: translateY(-4px) scale(1.12); filter: saturate(1); }
  .logo-foot { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 28px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .05em; color: var(--fg-3); }

  /* ============ scrollytelling steps ============ */
  .scrolly { display: grid; grid-template-columns: .9fr 1.1fr; gap: 72px; margin-top: 64px; align-items: start; }
  .scrolly-sticky { position: sticky; top: 120px; }
  .scrolly-sticky .h2 { max-width: 9em; }
  .stepstack { display: flex; flex-direction: column; gap: 28px; }
  .stepcard { padding: 34px 38px; border-radius: var(--r-xl); transition: all var(--dur-slow) var(--ease-standard); }
  .stepcard:hover { border-color: color-mix(in srgb, var(--accent) 42%, var(--border)); box-shadow: var(--inset-hairline), 0 0 calc(var(--glow) * 44px) -14px var(--accent-ring); }
  .stepcard .k { font-family: var(--font-mono); font-size: 13px; letter-spacing: .14em; color: var(--accent); display: block; margin-bottom: 16px; }
  .stepcard h3 { font-size: 28px; font-weight: 600; letter-spacing: var(--tracking-snug); color: var(--fg-strong); margin-bottom: 12px; }
  .stepcard p { font-size: 17px; color: var(--fg-2); }
  .stepcard .ex { margin-top: 22px; background: var(--bg-sunken); border: 1px solid var(--divider); border-radius: var(--r-md); padding: 16px 20px; font-family: var(--font-mono); font-size: 13px; color: var(--fg-3); display: flex; flex-direction: column; gap: 9px; }
  .stepcard .ex .ok { color: var(--status-current); }
  .stepcard .ex .up { color: var(--status-update); }
  .stepcard .ex b { color: var(--fg-2); font-weight: 500; }
  .catalog-hud { margin-top: 28px; display: flex; align-items: center; gap: 16px; padding: 22px 28px; border-radius: var(--r-lg); border: 1px dashed color-mix(in srgb, var(--accent) 40%, var(--border)); font-size: 16.5px; color: var(--fg-2); }
  .catalog-hud .mono { color: var(--accent); font-size: 13px; letter-spacing: .12em; flex: none; white-space: nowrap; }

  /* ============ video ============ */
  .video-hud { margin-top: 56px; position: relative; border-radius: var(--r-lg); overflow: hidden; border: 1px solid color-mix(in srgb, var(--accent) 26%, var(--border)); box-shadow: 0 30px 80px -24px rgba(0,0,0,.6), 0 0 calc(var(--glow) * 60px) -12px var(--accent-ring); background: var(--ink-950); }
  .video-hud video { width: 100%; display: block; aspect-ratio: 16/10; object-fit: cover; }
  .video-hud .corner { position: absolute; width: 18px; height: 18px; border: 1.5px solid var(--accent); opacity: .8; pointer-events: none; }
  .video-hud .c1 { top: 10px; left: 10px; border-right: none; border-bottom: none; }
  .video-hud .c2 { top: 10px; right: 10px; border-left: none; border-bottom: none; }
  .video-hud .c3 { bottom: 10px; left: 10px; border-right: none; border-top: none; }
  .video-hud .c4 { bottom: 10px; right: 10px; border-left: none; border-top: none; }

  /* ============ trust rail ============ */
  .rail { position: relative; margin-top: 64px; padding-left: 44px; }
  .rail::before { content: ""; position: absolute; left: 13px; top: 28px; bottom: 28px; width: 1.5px; background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 24%, transparent)); }
  .rnode { position: relative; padding: 22px 0; }
  .rnode::before { content: ""; position: absolute; left: -38px; top: 32px; width: 13px; height: 13px; border-radius: 50%; border: 2px solid var(--border-strong); background: var(--bg-sunken); transition: all var(--dur-slow); }
  .rnode.active::before { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 5px var(--accent-fill), 0 0 calc(var(--glow) * 20px) var(--accent-ring); }
  .rnode .rn-in { display: grid; grid-template-columns: 170px 1fr; gap: 28px; align-items: baseline; padding: 18px 28px; border-radius: var(--r-lg); transition: background var(--dur-slow); }
  .rnode.active .rn-in { background: var(--accent-fill); }
  .rnode b { font-size: 26px; font-weight: 600; color: var(--fg-strong); display: block; }
  .rnode .sub { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .1em; color: var(--fg-3); text-transform: uppercase; }
  .rnode p { font-size: 17px; color: var(--fg-2); }
  .proofs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 56px; }
  .proof { padding: 30px 34px; border-radius: var(--r-xl); }
  .proof .tag { display: inline-block; margin-bottom: 16px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .1em; color: var(--accent); background: var(--accent-fill); border-radius: var(--r-xs); padding: 4px 11px; white-space: nowrap; }
  .proof b { display: block; font-size: 21px; font-weight: 600; color: var(--fg-strong); margin-bottom: 10px; }
  .proof p { font-size: 16.5px; color: var(--fg-2); }

  /* ============ CTA ============ */
  .cta { margin-top: var(--sect-pad); position: relative; overflow: hidden; border-top: 1px solid var(--divider); padding: var(--sect-pad) 0; text-align: center; }
  .cta-glow { position: absolute; left: 50%; bottom: -420px; transform: translateX(-50%); width: 1000px; height: 800px; border-radius: 50%; background: radial-gradient(circle, var(--accent-fill), transparent 65%); opacity: calc(1 * var(--glow)); pointer-events: none; }
  .cta h2 { position: relative; font-size: clamp(42px, 5.6vw, 72px); font-weight: 700; letter-spacing: -0.025em; line-height: 1.04; color: var(--fg-strong); }
  .cta h2 em { font-style: normal; background: var(--grad-radar); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .cta p { position: relative; margin: 24px auto 0; max-width: 32em; font-size: 19px; color: var(--fg-2); }
  .cta .hero-ctas, .cta .ticker { position: relative; }

  footer { border-top: 1px solid var(--divider); padding: 38px 0 56px; }
  .foot { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12px; letter-spacing: .05em; color: var(--fg-3); }
  .foot .links { margin-left: auto; display: flex; gap: 22px; }
  .foot a:hover { color: var(--accent); }

  @media (max-width: 900px) {
    .prob-grid, .proofs, .scrolly { grid-template-columns: 1fr; }
    .scrolly-sticky { position: static; }
    .logogrid { gap: 32px; }
    .licon img { width: 44px; height: 44px; }
    .rnode .rn-in { grid-template-columns: 1fr; gap: 8px; }
    .nav-links { display: none; }
    html[data-hero="split"] .hero-inner { grid-template-columns: 1fr; }
  }