:root {
    --bg: #0B0B0D;
    --bg-2: #131318;
    --bg-3: #1B1B22;
    --bg-4: #24242D;
    --line: #2C2C36;
    --ink: #F5F4F8;
    --ink-dim: #9C9CA8;
    --ink-faint: #64646F;
    --g1: #34E4E4;
    --g2: #9B4BFF;
    --g3: #FF4D9E;
    --violet: #A860FF;
    --good: #35E4A0;
    --grad: linear-gradient(100deg, var(--g1), var(--g2) 55%, var(--g3));
    --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    color-scheme: dark;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--ink);
    font-family: "Archivo", system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  h1, h2, h3, .display {
    font-family: "Anton", "Arial Narrow", sans-serif;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: .012em;
    line-height: .95;
  }

  .kicker {
    font-size: .74rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .26em;
    color: var(--ink-dim);
  }
  .mono {
    font-family: "Courier Prime", ui-monospace, Menlo, monospace;
    letter-spacing: .02em;
  }

  .grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .shell { max-width: 1120px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.5rem); }

  /* ---------------- nav ---------------- */
  nav {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  nav .shell { display: flex; align-items: center; gap: 1.4rem; height: 62px; }
  .wordmark {
    font-family: "Anton", sans-serif; text-transform: uppercase;
    font-size: 1.5rem; letter-spacing: .04em; color: var(--ink);
    display: flex; align-items: center; gap: .5rem;
  }
  .wordmark .dot {
    width: 12px; height: 12px; border-radius: 50%;
    background: var(--grad);
  }
  nav .spacer { flex: 1; }
  nav a.navlink {
    color: var(--ink-dim); text-decoration: none; font-size: .92rem; font-weight: 500;
  }
  nav a.navlink:hover { color: var(--ink); }
  @media (max-width: 620px) { nav a.navlink { display: none; } }

  .pill {
    display: inline-flex; align-items: center; gap: .5rem;
    font-weight: 600; font-size: .92rem;
    padding: .6rem 1.15rem; border-radius: 999px;
    border: 1px solid transparent; cursor: pointer;
    text-decoration: none; white-space: nowrap;
    font-family: inherit;
    transition: transform .15s ease, filter .15s ease, background .15s;
  }
  .pill:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
  .pill-grad { background: var(--grad); color: #0A0A0C; }
  .pill-grad:hover { transform: translateY(-1px); filter: brightness(1.08); }
  .pill-ghost { border-color: var(--line); color: var(--ink); background: var(--bg-3); }
  .pill-ghost:hover { border-color: var(--ink-faint); transform: translateY(-1px); }
  .pill:disabled { opacity: .4; cursor: not-allowed; transform: none; filter: none; }

  /* ---------------- hero ---------------- */
  .hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
  .hero-bg {
    position: absolute; inset: 0; z-index: 0;
    background:
      radial-gradient(115% 75% at 12% -5%, rgba(155,75,255,.34), transparent 58%),
      radial-gradient(85% 65% at 92% 12%, rgba(52,228,228,.22), transparent 55%),
      radial-gradient(75% 80% at 78% 108%, rgba(255,77,158,.20), transparent 60%),
      var(--bg);
  }
  .hero-bg::before {
    content: ""; position: absolute; inset: 0;
    background: var(--noise); opacity: .05; mix-blend-mode: overlay;
  }
  .hero-bg::after {
    content: ""; position: absolute; inset: 0;
    background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(0,0,0,.16) 3px 4px);
    opacity: .5;
  }
  .beam {
    position: absolute; z-index: 0; top: -30%; left: 30%;
    width: 60vw; height: 130%;
    background: conic-gradient(from 210deg at 50% 0%, transparent, rgba(52,228,228,.10), rgba(155,75,255,.14), transparent);
    filter: blur(40px);
    animation: sweep 14s ease-in-out infinite alternate;
  }
  @keyframes sweep { to { transform: translateX(12%) rotate(6deg); } }

  .hero .shell {
    position: relative; z-index: 1;
    padding-top: clamp(3rem, 9vw, 6.5rem); padding-bottom: clamp(2.5rem, 6vw, 4rem);
    display: flex; flex-direction: column; align-items: center; text-align: center;
  }
  .hero h1 {
    font-size: clamp(2.9rem, 9.2vw, 6.6rem);
    max-width: 15ch;
    text-wrap: balance;
  }
  .hero h1 .grad-text { display: inline-block; }
  .rhythm {
    margin-top: 1.1rem;
    font-family: "Anton", sans-serif; text-transform: uppercase;
    letter-spacing: .18em; font-size: clamp(.85rem, 2.4vw, 1.15rem);
    color: var(--ink-dim);
  }
  .rhythm b { color: var(--ink); }
  .hero p.lede {
    margin-top: 1.4rem; max-width: 40rem;
    color: var(--ink-dim); font-size: 1.08rem;
  }
  .hero-cta { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 2rem; align-items: center; justify-content: center; }
  .hero-cta .pill { padding: .8rem 1.5rem; font-size: 1rem; }
  .stat-row { display: flex; gap: 1.8rem; margin-top: 2.4rem; flex-wrap: wrap; justify-content: center; }
  .stat b { font-family: "Anton", sans-serif; font-size: 1.5rem; display: block; }
  .stat span { font-size: .78rem; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-faint); }

  /* ---------------- section frame ---------------- */
  section.block { padding-top: clamp(3rem, 8vw, 6rem); padding-bottom: clamp(3rem, 8vw, 6rem); }
  .block-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; margin-bottom: 1.8rem; flex-wrap: wrap; }
  .block-head h2 { font-size: clamp(1.9rem, 5vw, 3.1rem); }
  .block-head p { color: var(--ink-dim); max-width: 32rem; margin-top: .4rem; }

  /* ---------------- showcase carousel ---------------- */
  .carousel-wrap { position: relative; }
  .carousel {
    display: flex; gap: 1rem; overflow-x: auto; scroll-snap-type: x mandatory;
    padding-bottom: .6rem; scrollbar-width: none;
  }
  .carousel::-webkit-scrollbar { display: none; }
  .cast-tile {
    flex: 0 0 clamp(180px, 44vw, 232px);
    scroll-snap-align: start;
    position: relative;
    aspect-ratio: 3 / 4;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--line);
    cursor: pointer;
    background: var(--bg-2);
    text-align: left;
    font-family: inherit; color: var(--ink);
    transition: transform .18s ease, border-color .18s ease;
  }
  .cast-tile:hover { transform: translateY(-4px); border-color: var(--violet); }
  .cast-tile:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
  .cast-tile .portrait { position: absolute; inset: 0; }
  .cast-tile .portrait svg, .pick .sw svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
  .cast-tile .portrait::after {
    content: ""; position: absolute; inset: 0; background: var(--noise); opacity: .08; mix-blend-mode: overlay; pointer-events: none;
  }
  .cast-tile .scrim {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.15) 62%, rgba(6,6,8,.92));
  }
  .cast-tile .caption { position: absolute; left: 0; right: 0; bottom: 0; padding: .8rem .85rem .9rem; display: flex; flex-direction: column; gap: .12rem; }
  .cast-tile .caption .nm {
    font-family: "Anton", sans-serif; text-transform: uppercase; font-size: 1.02rem;
    letter-spacing: .02em; line-height: 1.05;
  }
  .cast-tile .caption .by {
    font-size: .66rem; color: var(--ink-dim); text-transform: uppercase; letter-spacing: .1em;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  }
  .cast-tile .go {
    position: absolute; top: .7rem; right: .7rem;
    font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em;
    background: rgba(10,10,12,.7); border: 1px solid rgba(255,255,255,.18);
    padding: .28rem .55rem; border-radius: 999px;
    opacity: 0; transition: opacity .18s;
  }
  .cast-tile:hover .go, .cast-tile:focus-visible .go { opacity: 1; }
  .cast-tile .views {
    position: absolute; left: .6rem; top: .6rem; z-index: 2;
    font-family: "Courier Prime", monospace; font-size: .66rem; letter-spacing: .04em;
    color: #fff; background: rgba(10,10,12,.6); padding: .12rem .45rem; border-radius: 999px;
  }
  .arrows { display: flex; gap: .5rem; }
  .arrows button {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--bg-3); border: 1px solid var(--line); color: var(--ink);
    cursor: pointer; font-size: 1rem;
  }
  .arrows button:hover { border-color: var(--ink-faint); }
  .arrows button:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }

  /* ---------------- tool console ---------------- */
  .console {
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 20px;
    overflow: hidden;
  }
  .rail { display: flex; border-bottom: 1px solid var(--line); background: var(--bg); }
  .rail button {
    flex: 1; background: none; border: none; border-right: 1px solid var(--line);
    padding: 1rem .6rem; cursor: pointer; color: var(--ink-faint);
    font-family: inherit; position: relative;
    display: flex; flex-direction: column; align-items: center; gap: .15rem;
    transition: color .16s;
  }
  .rail button:last-child { border-right: none; }
  .rail button .n { font-family: "Courier Prime", monospace; font-size: .72rem; letter-spacing: .14em; }
  .rail button .t {
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .1em; font-size: 1rem;
  }
  .rail button[aria-current="step"] { color: var(--ink); }
  .rail button[aria-current="step"]::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; background: var(--grad);
  }
  .rail button[data-done="1"] { color: var(--ink-dim); }
  .rail button[data-done="1"] .n::before { content: "● "; color: var(--good); }
  .rail button:disabled { cursor: not-allowed; opacity: .5; }
  .rail button:not(:disabled):hover { color: var(--ink); }
  .rail button:focus-visible { outline: 2px solid var(--violet); outline-offset: -3px; }

  .stage { padding: clamp(1.3rem, 3.5vw, 2.4rem); }
  .panel { display: none; }
  .panel.active { display: block; animation: rise .3s ease both; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

  .panel h3 { font-size: 1.5rem; }
  .panel .sub { color: var(--ink-dim); margin: .3rem 0 1.4rem; font-size: .96rem; }

  .drop {
    border: 1.5px dashed var(--line); border-radius: 14px; background: var(--bg);
    padding: clamp(1.8rem, 6vw, 3.4rem); text-align: center; cursor: pointer;
    transition: border-color .16s, background .16s;
  }
  .drop.over { border-color: var(--violet); background: color-mix(in srgb, var(--violet) 10%, var(--bg)); }
  .drop:focus-visible { outline: 2px solid var(--violet); outline-offset: 3px; }
  .drop .ic { font-family: "Anton", sans-serif; font-size: 2rem; letter-spacing: .12em; }
  .drop .ic span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .drop strong { display: block; margin-top: .5rem; font-size: 1.05rem; }
  .drop small { color: var(--ink-dim); }
  .drop.has-file { padding: .6rem; border-style: solid; text-align: left; }
  .drop-loaded[hidden] { display: none; }
  .drop-loaded { display: flex; align-items: center; gap: .9rem; }
  .drop-loaded #thumb {
    width: 132px; aspect-ratio: 16 / 9; flex: none;
    border-radius: 9px; border: 1px solid var(--line); background: #000; object-fit: cover;
  }
  .drop-meta { display: flex; flex-direction: column; gap: .12rem; min-width: 0; }
  .drop-meta b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .drop-meta #fMeta { color: var(--ink-dim); font-size: .82rem; }
  .drop-change {
    margin-top: .2rem; font-family: "Courier Prime", monospace;
    font-size: .72rem; letter-spacing: .08em; color: var(--violet);
  }

  .divider {
    display: flex; align-items: center; gap: 1rem; margin: 1.1rem 0;
    color: var(--ink-faint); font-family: "Courier Prime", monospace;
    text-transform: uppercase; letter-spacing: .2em; font-size: .72rem;
  }
  .divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }

  .inrow { display: flex; gap: .6rem; flex-wrap: wrap; }
  .inrow input {
    flex: 1; min-width: 12rem; padding: .75rem .9rem;
    background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
    color: var(--ink); font-family: "Courier Prime", monospace; font-size: .88rem;
  }
  .inrow input:focus-visible { outline: 2px solid var(--violet); outline-offset: 1px; }

  .slate[hidden] { display: none; }
  .slate {
    display: flex; gap: 1rem; align-items: center; margin-top: 1.3rem;
    padding: .9rem 1rem; background: var(--bg); border: 1px solid var(--line);
    border-left: 3px solid var(--good); border-radius: 12px;
  }
  .slate canvas { width: 104px; aspect-ratio: 16/9; border-radius: 8px; background: #000; flex: none; border: 1px solid var(--line); object-fit: cover; }
  .slate .m { min-width: 0; }
  .slate .m b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .slate .m span { color: var(--ink-dim); font-size: .82rem; }

  .actions { display: flex; gap: .7rem; align-items: center; flex-wrap: wrap; margin-top: 1.6rem; }
  .actions .grow { flex: 1; }

  /* casting grid */
  .pick-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: .55rem; }
  .pick {
    display: flex; align-items: center; gap: .6rem;
    border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
    padding: .45rem .55rem;
    background: var(--bg); cursor: pointer; text-align: left; color: var(--ink);
    font-family: inherit; transition: transform .14s, border-color .14s;
  }
  .pick:hover { transform: translateY(-2px); border-color: var(--ink-faint); }
  .pick:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
  .pick .sw {
    flex: none; width: 40px; height: 40px; border-radius: 8px;
    position: relative; overflow: hidden; border: 1px solid var(--line); background: var(--bg-3);
  }
  .pick .sw svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
  .pick .pb { display: flex; flex-direction: column; min-width: 0; }
  .pick .pn {
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .03em;
    font-size: .82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .pick .pt {
    color: var(--ink-dim); font-size: .7rem;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .pick[aria-pressed="true"] { border-color: var(--violet); box-shadow: inset 0 0 0 2px var(--violet); }
  .pick[aria-pressed="true"] .sw::after {
    content: "✓"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
    background: rgba(155, 75, 255, .58); color: #fff; font-size: 1rem; font-weight: 700;
  }
  .cast-count { margin-top: 1rem; font-family: "Courier Prime", monospace; font-size: .8rem; color: var(--ink-dim); text-transform: uppercase; letter-spacing: .1em; }

  /* step 3 */
  .perf { height: 12px; background: var(--line); -webkit-mask: repeating-linear-gradient(90deg, transparent 0 5px, #000 5px 16px); mask: repeating-linear-gradient(90deg, transparent 0 5px, #000 5px 16px); }
  .frames { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  @media (max-width: 560px) { .frames { grid-template-columns: 1fr; } }
  .fbox { position: relative; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #000; }
  .fbox canvas, .fbox video { display: block; width: 100%; height: auto; }
  .fbox canvas[hidden], .fbox video[hidden] { display: none; }
  .fbox .lab {
    position: absolute; top: 0; left: 0; font-family: "Courier Prime", monospace;
    font-size: .66rem; letter-spacing: .14em; text-transform: uppercase;
    background: rgba(0,0,0,.66); padding: .2rem .5rem;
  }
  .bar { margin-top: .85rem; height: 6px; border-radius: 3px; background: var(--bg-3); overflow: hidden; }
  .bar i { display: block; height: 100%; width: 0; background: var(--grad); transition: width .4s ease; }
  .log {
    margin-top: .85rem; background: #08080A; border: 1px solid var(--line); border-radius: 10px;
    padding: .85rem 1rem; font-family: "Courier Prime", monospace; font-size: .82rem; line-height: 1.75;
    min-height: 6rem; max-height: 12rem; overflow-y: auto; color: #c7cbd2;
  }
  .log .ln { display: flex; gap: .9rem; }
  .log .tc { color: #5f6570; flex: none; }
  .log .ln.ok .msg { color: var(--good); }

  /* how it works */
  .how-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
  @media (max-width: 720px) { .how-grid { grid-template-columns: 1fr; } }
  .how-card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 16px; padding: 1.5rem; }
  .how-card .step-n {
    font-family: "Anton", sans-serif; font-size: 2.6rem; line-height: 1;
    background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .how-card h3 { font-size: 1.25rem; margin: .5rem 0 .4rem; }
  .how-card p { color: var(--ink-dim); font-size: .95rem; }

  /* faq */
  .faq-head { flex-direction: column; align-items: center; text-align: center; }
  .faq { display: flex; flex-direction: column; gap: .6rem; max-width: 760px; margin: 0 auto; }
  details.q {
    background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px;
    padding: .3rem .3rem; overflow: hidden;
  }
  details.q summary {
    list-style: none; cursor: pointer; padding: .95rem 1.1rem;
    font-weight: 600; display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  }
  details.q summary::-webkit-details-marker { display: none; }
  details.q summary::after { content: "+"; font-family: "Anton", sans-serif; font-size: 1.3rem; color: var(--violet); }
  details.q[open] summary::after { content: "\2013"; }
  details.q .a { padding: 0 1.1rem 1rem; color: var(--ink-dim); font-size: .95rem; }
  details.q summary:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; border-radius: 8px; }

  footer {
    border-top: 1px solid var(--line); padding: 2.5rem 0;
    color: var(--ink-faint); font-size: .82rem;
  }
  footer .shell { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; }
  footer .mono { color: var(--ink-dim); }

  .field-label {
    margin: 1.4rem 0 .55rem; font-family: "Courier Prime", monospace;
    font-size: .74rem; text-transform: uppercase; letter-spacing: .18em; color: var(--ink-dim);
  }
  .style-row { display: flex; flex-wrap: wrap; gap: .5rem; }
  .style-chip {
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .06em;
    font-size: .88rem; padding: .5rem 1rem; border-radius: 999px;
    background: var(--bg-3); color: var(--ink-dim);
    border: 1px solid var(--line); cursor: pointer; transition: transform .14s, border-color .14s, color .14s;
  }
  .style-chip:hover { transform: translateY(-1px); color: var(--ink); }
  .style-chip:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
  .style-chip[aria-pressed="true"] { color: var(--accent-ink); background: var(--grad); border-color: transparent; }

  .modal[hidden] { display: none; }
  .modal {
    position: fixed; inset: 0; z-index: 95;
    background: rgba(6,6,10,.82); backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    padding: 1.2rem; overflow-y: auto;
  }
  .auth {
    position: relative; width: 100%; max-width: 440px;
    background: linear-gradient(180deg, #1c1526, var(--bg-2) 60%);
    border: 1px solid var(--line); border-radius: 18px;
    padding: 2.4rem 2rem 1.8rem; text-align: center;
  }
  .auth-x {
    position: absolute; top: 1rem; right: 1rem; width: 34px; height: 34px;
    border-radius: 50%; border: 1px solid var(--line); background: var(--bg-3);
    color: var(--ink-dim); font-size: 1.2rem; line-height: 1; cursor: pointer;
  }
  .auth-x:hover { color: var(--ink); }
  .auth h3 { font-size: 1.7rem; }
  .auth-offer { margin-top: .7rem; color: var(--ink-dim); font-size: .92rem; }
  .auth-offer .pct {
    display: inline-block; background: var(--grad); color: var(--accent-ink);
    font-weight: 700; border-radius: 999px; padding: .1rem .5rem; font-size: .82rem; margin: 0 .15rem;
  }
  #authForm { margin-top: 1.4rem; display: flex; flex-direction: column; gap: .7rem; }
  #authEmail {
    padding: .85rem 1rem; border-radius: 10px; border: 1px solid var(--line);
    background: var(--bg); color: var(--ink); font-family: inherit; font-size: .95rem;
  }
  #authEmail:focus-visible { outline: 2px solid var(--violet); outline-offset: 1px; }
  .auth-primary {
    padding: .85rem 1rem; border-radius: 10px; border: none; cursor: pointer;
    background: var(--grad); color: var(--accent-ink);
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .08em; font-size: 1rem;
  }
  .auth-primary:hover { filter: brightness(1.08); }
  .auth-or { display: flex; align-items: center; gap: .8rem; margin: 1.1rem 0; color: var(--ink-faint); font-size: .8rem; }
  .auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
  .auth-social {
    width: 100%; padding: .8rem 1rem; border-radius: 999px; cursor: pointer;
    border: 1px solid var(--line); background: var(--bg-3); color: var(--ink);
    font-family: inherit; font-weight: 600; font-size: .92rem;
  }
  .auth-social:hover { border-color: var(--ink-faint); }
  .auth-social[data-p="Google"] { background: #f4f4f6; color: #1b1b1f; border-color: #f4f4f6; }
  .auth-social-row { display: flex; gap: .6rem; margin-top: .6rem; }
  .auth-social-row .auth-social { margin: 0; }
  .auth-fine { margin-top: 1.2rem; font-size: .76rem; color: var(--ink-faint); line-height: 1.6; }
  .auth-fine a, .auth-login a { color: var(--ink-dim); }
  .auth-login { margin-top: .9rem; font-size: .86rem; color: var(--ink-dim); }

  .toast {
    position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%) translateY(1rem);
    background: var(--ink); color: var(--bg); padding: .7rem 1.1rem; border-radius: 8px;
    font-family: "Courier Prime", monospace; font-size: .82rem;
    opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; z-index: 80;
  }
  .toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

  /* ---------- top brand ---------- */
  .topbar {
    position: sticky; top: 0; z-index: 40;
    display: flex; justify-content: center;
    padding: .7rem 1rem;
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .brand { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; }
  .brand-dot { width: 13px; height: 13px; border-radius: 50%; background: var(--grad); }
  .brand-name {
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .12em;
    font-size: 1.35rem; color: var(--ink);
  }

  /* ---------- extension section ---------- */
  .ext-card {
    display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    background: linear-gradient(135deg, #1b1430, var(--bg-2) 65%);
    border: 1px solid var(--line); border-radius: 20px;
    padding: clamp(1.5rem, 4vw, 2.8rem);
  }
  @media (max-width: 760px) { .ext-card { grid-template-columns: 1fr; } }
  .ext-copy h2 { font-size: clamp(1.8rem, 4.5vw, 2.7rem); display: flex; align-items: baseline; gap: .7rem; flex-wrap: wrap; }
  .ext-badge {
    font-family: "Courier Prime", monospace; font-size: .68rem; letter-spacing: .12em;
    text-transform: uppercase; color: var(--accent-ink);
    background: var(--grad); padding: .22rem .55rem; border-radius: 999px;
  }
  .ext-copy p { color: var(--ink-dim); margin-top: .7rem; max-width: 42ch; }
  .ext-list { list-style: none; margin: 1.1rem 0 1.4rem; display: flex; flex-direction: column; gap: .5rem; }
  .ext-list li { position: relative; padding-left: 1.4rem; font-size: .93rem; }
  .ext-list li::before { content: "→"; position: absolute; left: 0; color: var(--violet); }

  .ext-art { display: flex; justify-content: center; }
  .ext-browser {
    width: 100%; max-width: 320px; background: var(--bg); border: 1px solid var(--line);
    border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); position: relative;
  }
  .ext-dots { display: flex; gap: .35rem; padding: .6rem .7rem; background: var(--bg-3); }
  .ext-dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-faint); }
  .ext-tab {
    margin: .8rem; padding: .9rem 1rem; border-radius: 8px;
    background: linear-gradient(120deg, #3a1d5c, #12333a);
    font-family: "Courier Prime", monospace; font-size: .8rem; color: var(--ink-dim);
  }
  .ext-pop {
    position: absolute; right: .7rem; bottom: .7rem; width: 76%;
    background: var(--bg-2); border: 1px solid var(--violet); border-radius: 10px;
    padding: .7rem .8rem; display: flex; flex-direction: column; gap: .45rem;
  }
  .ext-pop-title {
    font-family: "Anton", sans-serif; text-transform: uppercase; letter-spacing: .06em; font-size: .82rem;
  }
  .ext-pop-row {
    display: flex; align-items: center; justify-content: space-between; gap: .5rem;
    font-family: "Courier Prime", monospace; font-size: .72rem; color: var(--ink-dim);
  }
  .ext-pop-row b {
    color: var(--accent-ink); background: var(--grad);
    padding: .15rem .5rem; border-radius: 999px; font-family: "Archivo", sans-serif; font-size: .68rem;
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
  }