/* StepPDF 3D — styles. Tokens first; every colour comes from a token. */
:root {
  --ground: #f2f4f6;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --stage: #e8ecf0;
  --ink: #121821;
  --ink-2: #4b5563;
  --ink-3: #6b7482;
  --line: #dce1e7;
  --line-strong: #c3cad3;
  --accent: #e0550c;
  --accent-ink: #b3430a;
  --accent-soft: #fdeee5;
  --on-accent: #ffffff;
  --good: #1d7f4f;
  --good-soft: #e5f4ec;
  --warn: #9a6512;
  --warn-soft: #fbf1df;
  --bad: #b8322a;
  --bad-soft: #fbe9e7;
  --ad: #eef0f3;
  --ad-ink: #8a93a0;
  --shadow: 0 1px 2px rgba(18, 24, 33, .06), 0 8px 24px rgba(18, 24, 33, .07);
  --radius: 10px;
  --radius-s: 6px;
  --f-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", Roboto, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #0e1217; --surface: #151a21; --surface-2: #1a2029; --stage: #1b2129;
    --ink: #e7ebf0; --ink-2: #a7b1be; --ink-3: #8691a0; --line: #28303a; --line-strong: #3a4450;
    --accent: #ff7a33; --accent-ink: #ff9a63; --accent-soft: #2e1d13; --on-accent: #1a0f08;
    --good: #52c28a; --good-soft: #13251c; --warn: #e2ac4d; --warn-soft: #2a2213; --bad: #f07a70; --bad-soft: #2c1715;
    --ad: #1a2029; --ad-ink: #6f7a88; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ground: #0e1217; --surface: #151a21; --surface-2: #1a2029; --stage: #1b2129;
  --ink: #e7ebf0; --ink-2: #a7b1be; --ink-3: #8691a0; --line: #28303a; --line-strong: #3a4450;
  --accent: #ff7a33; --accent-ink: #ff9a63; --accent-soft: #2e1d13; --on-accent: #1a0f08;
  --good: #52c28a; --good-soft: #13251c; --warn: #e2ac4d; --warn-soft: #2a2213; --bad: #f07a70; --bad-soft: #2c1715;
  --ad: #1a2029; --ad-ink: #6f7a88; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font: 400 15px/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-ink); text-underline-offset: 2px; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
img, svg { max-width: 100%; }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------------------------------------------------------------- layout */
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding-inline: 20px; }
@media (max-width: 480px) { .wrap { padding-inline: 16px; } }
.page { display: grid; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 1560px) {
  .page { grid-template-columns: minmax(0, 1fr) 180px; max-width: 1480px; margin: 0 auto; gap: 24px; padding-inline: 20px; }
  .page .wrap { padding-inline: 0; }
  .rail { display: block !important; }
}
.rail { display: none; padding-top: 24px; }
.rail .ad { position: sticky; top: 90px; width: 160px; height: 600px; }

/* ---------------------------------------------------------------- header */
.topbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 40; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; gap: 20px; min-height: 58px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 800 17px/1 var(--f-display); letter-spacing: -.01em; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand small { font: 500 11px/1 var(--f-mono); color: var(--ink-3); letter-spacing: .02em; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a { padding: 8px 12px; border-radius: var(--radius-s); color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 14px; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.privacy-chip { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--good); background: var(--good-soft); padding: 6px 10px; border-radius: 99px; white-space: nowrap; }
@media (max-width: 860px) { .nav { display: none; } .privacy-chip { margin-left: auto; } }
@media (max-width: 400px) { .privacy-chip span { display: none; } }

/* ---------------------------------------------------------------- hero */
.hero { padding-block: 26px 12px; }
.hero-grid { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px 32px; }
.eyebrow { font: 600 12px/1 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 10px; }
h1 { font: 800 clamp(27px, 3.6vw, 40px)/1.08 var(--f-display); letter-spacing: -.02em; margin: 0; text-wrap: balance; }
.hero p.lede { margin: 10px 0 0; color: var(--ink-2); max-width: 62ch; font-size: 16px; }
.flow { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font: 500 12.5px/1 var(--f-mono); color: var(--ink-2); }
.flow span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 99px; background: var(--surface); }
.flow i { color: var(--ink-3); font-style: normal; }

/* ---------------------------------------------------------------- tabs */
.tabs { display: flex; gap: 6px; margin-top: 20px; border-bottom: 1px solid var(--line); }
.tab { appearance: none; border: 0; background: none; padding: 12px 16px 13px; cursor: pointer; display: flex; flex-direction: column; gap: 3px; text-align: left; border-bottom: 3px solid transparent; margin-bottom: -1px; color: var(--ink-2); }
.tab b { font: 800 13px/1 var(--f-display); letter-spacing: .08em; }
.tab small { font-size: 12.5px; color: var(--ink-3); }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tab[aria-selected="true"] small { color: var(--ink-2); }
.tab:hover { color: var(--ink); }

/* ---------------------------------------------------------------- workspace */
.ws { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 18px; padding-block: 18px 8px; }
@media (max-width: 980px) { .ws { grid-template-columns: minmax(0, 1fr); } }
.stage { position: relative; background: var(--stage); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; aspect-ratio: 16 / 10; min-height: 360px; max-width: 100%; touch-action: none; }
@media (max-width: 640px) { .stage { aspect-ratio: 4 / 5; min-height: 0; } }
.viewer-host { position: absolute; inset: 0; }
.viewer-canvas { width: 100%; height: 100%; display: block; }
.stage-label { position: absolute; left: 12px; top: 12px; z-index: 3; display: flex; gap: 8px; align-items: center; font: 500 12px/1 var(--f-mono); color: var(--ink-2); background: color-mix(in srgb, var(--surface) 88%, transparent); padding: 7px 10px; border-radius: 99px; border: 1px solid var(--line); max-width: calc(100% - 24px); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stage-label b { color: var(--ink); font-weight: 600; }

/* dropzone */
.dropzone { position: absolute; inset: 0; z-index: 5; display: grid; place-items: center; padding: 20px; text-align: center; background:
  linear-gradient(var(--stage), var(--stage)) padding-box; }
.dropzone.has-model { background: color-mix(in srgb, var(--stage) 86%, transparent); }
.dz-inner { width: min(520px, 100%); border: 2px dashed var(--line-strong); border-radius: 14px; padding: 34px 24px; background: color-mix(in srgb, var(--surface) 70%, transparent); transition: border-color .15s, background .15s; }
.dropzone.drag .dz-inner { border-color: var(--accent); background: var(--accent-soft); }
.dz-icon { width: 54px; height: 54px; margin: 0 auto 12px; color: var(--accent); }
.dz-title { font: 700 19px/1.25 var(--f-display); margin: 0; }
.dz-sub { color: var(--ink-2); margin: 6px 0 16px; font-size: 14px; }
.dz-formats { margin: 14px 0 0; font: 500 12px/1.5 var(--f-mono); color: var(--ink-3); }
.dz-limits { margin: 4px 0 0; font-size: 12px; color: var(--ink-3); }
.dz-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* buttons */
.btn { appearance: none; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); border-radius: 8px; padding: 10px 16px; font-weight: 600; font-size: 14px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none; line-height: 1.2; }
.btn:hover { border-color: var(--ink-3); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn-lg { padding: 14px 20px; font-size: 15.5px; width: 100%; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-2); padding: 8px 10px; }
.btn-ghost:hover { background: var(--surface-2); color: var(--ink); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* viewer toolbar */
.vtools { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); z-index: 4; display: flex; gap: 2px; align-items: center; padding: 4px; background: color-mix(in srgb, var(--surface) 94%, transparent); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); max-width: calc(100% - 20px); overflow-x: auto; scrollbar-width: none; }
.vtools::-webkit-scrollbar { display: none; }
.vt { appearance: none; border: 0; background: none; width: 38px; height: 38px; border-radius: 8px; display: grid; place-items: center; cursor: pointer; color: var(--ink-2); flex: none; position: relative; }
.vt svg { width: 20px; height: 20px; }
.vt:hover { background: var(--surface-2); color: var(--ink); }
.vt[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-ink); }
.vt-sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; flex: none; }
.views-pop { position: absolute; z-index: 6; bottom: 62px; left: 50%; transform: translateX(-50%); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 8px; display: grid; grid-template-columns: repeat(4, auto); gap: 4px; }
.views-pop button { appearance: none; border: 1px solid var(--line); background: var(--surface-2); border-radius: 8px; padding: 8px 10px; cursor: pointer; font-size: 13px; font-weight: 500; color: var(--ink); white-space: nowrap; }
.views-pop button:hover { border-color: var(--accent); color: var(--accent-ink); }
@media (max-width: 520px) { .views-pop { grid-template-columns: repeat(2, auto); } }
.measure-label { position: absolute; left: 0; top: 0; z-index: 4; pointer-events: none; background: var(--ink); color: var(--surface); font: 600 12.5px/1 var(--f-mono); padding: 6px 9px; border-radius: 6px; white-space: nowrap; }
.hint { position: absolute; right: 12px; top: 12px; z-index: 3; font-size: 12px; color: var(--ink-2); background: color-mix(in srgb, var(--surface) 88%, transparent); border: 1px solid var(--line); border-radius: 8px; padding: 6px 9px; max-width: 60%; }
@media (max-width: 640px) { .hint { display: none; } }

/* progress overlay */
.progress { position: absolute; inset: 0; z-index: 7; display: grid; place-items: center; background: color-mix(in srgb, var(--stage) 82%, transparent); backdrop-filter: blur(2px); padding: 16px; }
.progress-card { width: min(420px, 100%); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 20px 22px; }
.progress-card h3 { margin: 0 0 12px; font: 700 16px/1.3 var(--f-display); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; font-size: 14px; }
.steps li { display: flex; align-items: center; gap: 10px; color: var(--ink-3); }
.steps li::before { content: ""; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--line-strong); flex: none; }
.steps li.active { color: var(--ink); font-weight: 600; }
.steps li.active::before { border-color: var(--accent); border-top-color: transparent; animation: spin .8s linear infinite; }
.steps li.done { color: var(--ink-2); }
.steps li.done::before { background: var(--good); border-color: var(--good); box-shadow: inset 0 0 0 2px var(--surface); }
@keyframes spin { to { transform: rotate(360deg); } }
.bar { height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-top: 14px; border: 1px solid var(--line); }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .25s; }

/* side panel */
.side { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.panel-h { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.panel-h h2, .panel-h h3 { margin: 0; font: 700 13px/1 var(--f-display); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }
.panel-b { padding: 12px 14px; }
.file-card { display: flex; gap: 12px; align-items: center; }
.fmt-badge { flex: none; width: 46px; height: 54px; border-radius: 6px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; font: 700 11px/1 var(--f-mono); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); position: relative; }
.fmt-badge::after { content: ""; position: absolute; right: -1px; top: -1px; width: 12px; height: 12px; background: linear-gradient(225deg, var(--surface) 50%, color-mix(in srgb, var(--accent) 30%, var(--surface)) 50%); border-bottom-left-radius: 3px; }
.file-name { font-weight: 600; word-break: break-all; line-height: 1.3; }
.file-meta { font-size: 12.5px; color: var(--ink-3); margin-top: 3px; }
.kv { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 7px 14px; margin: 0; font-size: 13.5px; }
.kv dt { color: var(--ink-3); }
.kv dd { margin: 0; text-align: right; font-family: var(--f-mono); font-variant-numeric: tabular-nums; font-size: 13px; word-break: break-word; }
.kv .dims { font-weight: 600; color: var(--ink); }
.empty-note { color: var(--ink-3); font-size: 13.5px; margin: 0; }
.support { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 99px; }
.support.full { color: var(--good); background: var(--good-soft); }
.support.experimental { color: var(--warn); background: var(--warn-soft); }
.support.external { color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line); }
.opts { display: grid; gap: 10px; }
.opt { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; font-size: 13.5px; }
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 8px; overflow: hidden; }
.seg button { appearance: none; border: 0; background: var(--surface); padding: 6px 10px; font-size: 12.5px; cursor: pointer; color: var(--ink-2); }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--surface); }

/* tree */
.tree { list-style: none; margin: 0; padding: 0; font-size: 13.5px; max-height: 260px; overflow: auto; }
.tree ul { list-style: none; margin: 0; padding-left: 16px; border-left: 1px dotted var(--line-strong); margin-left: 8px; }
.tree label { display: flex; align-items: center; gap: 8px; padding: 3px 4px; border-radius: 5px; cursor: pointer; min-width: 0; }
.tree label:hover { background: var(--surface-2); }
.tree label.picked { background: var(--accent-soft); }
.tree input { accent-color: var(--accent); margin: 0; flex: none; }
.tree .sw { width: 10px; height: 10px; border-radius: 2px; flex: none; border: 1px solid rgba(0,0,0,.15); }
.tree .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree .asm > label .nm { font-weight: 600; }
.tree-tools { display: flex; gap: 6px; }

/* results */
.result { border: 1px solid color-mix(in srgb, var(--good) 40%, var(--line)); background: var(--good-soft); border-radius: var(--radius); padding: 14px; display: grid; gap: 10px; }
.result h3 { margin: 0; font: 700 16px/1.2 var(--f-display); color: var(--good); display: flex; align-items: center; gap: 8px; }
.result p { margin: 0; font-size: 13px; color: var(--ink-2); }
.dl-row { display: flex; flex-wrap: wrap; gap: 6px; }
.dl-row .btn { padding: 7px 10px; font-size: 12.5px; }
.note { font-size: 12.5px; color: var(--ink-3); margin: 0; line-height: 1.5; }
.alert { border-radius: var(--radius); padding: 12px 14px; font-size: 14px; display: grid; gap: 6px; }
.alert.err { background: var(--bad-soft); color: var(--bad); border: 1px solid color-mix(in srgb, var(--bad) 35%, transparent); }
.alert.warn { background: var(--warn-soft); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent); }
.alert b { color: inherit; }
.alert p { margin: 0; color: var(--ink-2); }

.privacy-line { display: flex; gap: 8px; align-items: flex-start; font-size: 12.5px; color: var(--ink-2); line-height: 1.5; }
.privacy-line svg { width: 16px; height: 16px; flex: none; color: var(--good); margin-top: 2px; }

/* ---------------------------------------------------------------- ads */
.ad { background: var(--ad); border: 1px dashed var(--line-strong); border-radius: 8px; display: grid; place-items: center; color: var(--ad-ink); font: 700 11px/1 var(--f-mono); letter-spacing: .18em; text-align: center; }
.ad small { display: block; font-weight: 500; letter-spacing: .02em; margin-top: 6px; font-size: 10.5px; }
.ad-banner { height: 90px; margin-block: 10px 6px; }
.ad-between { height: 110px; margin-block: 8px; }
.ad-inline { height: 250px; max-width: 336px; margin: 18px auto; }
@media (max-width: 640px) { .ad-banner { height: 70px; } .ad-between { height: 100px; } }
.ad-modal { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; background: rgba(8, 11, 15, .45); padding: 16px; }
.ad-modal-card { position: relative; width: min(380px, 100%); background: var(--surface); border-radius: 12px; box-shadow: var(--shadow); padding: 14px; }
.ad-modal-card .ad { height: 250px; }
.ad-modal-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.ad-modal-top span { font: 700 11px/1 var(--f-mono); letter-spacing: .16em; color: var(--ad-ink); }
.ad-close { appearance: none; border: 1px solid var(--line-strong); background: var(--surface); border-radius: 8px; padding: 7px 10px; font-weight: 600; cursor: pointer; font-size: 13px; }
.ad-toast { position: fixed; left: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 80; width: min(300px, calc(100vw - 32px)); background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 10px; display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: start; }
.ad-toast .ad { height: 70px; grid-column: 1 / -1; }
.ad-toast span { font: 700 10.5px/1 var(--f-mono); letter-spacing: .16em; color: var(--ad-ink); padding-top: 4px; }
.ad-toast button { appearance: none; border: 0; background: none; cursor: pointer; font-size: 12.5px; color: var(--ink-2); padding: 2px 4px; }

/* ---------------------------------------------------------------- content */
section.block { padding-block: 44px 8px; }
h2.sec { font: 800 clamp(22px, 2.5vw, 29px)/1.15 var(--f-display); letter-spacing: -.015em; margin: 0 0 8px; text-wrap: balance; }
.sec-lede { color: var(--ink-2); margin: 0 0 22px; max-width: 70ch; }
.steps3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; counter-reset: st; }
@media (max-width: 820px) { .steps3 { grid-template-columns: 1fr; } }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; position: relative; }
.step .n { font: 700 12px/1 var(--f-mono); color: var(--accent-ink); letter-spacing: .06em; }
.step h3 { margin: 8px 0 6px; font: 700 17px/1.25 var(--f-display); }
.step p { margin: 0; color: var(--ink-2); font-size: 14.5px; }

.fmt-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table.fmt { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
table.fmt th, table.fmt td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.fmt th { font: 600 12px/1 var(--f-mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; background: var(--surface-2); }
table.fmt tr:last-child td { border-bottom: 0; }
table.fmt td.ext { font-family: var(--f-mono); font-size: 13px; color: var(--ink-2); white-space: nowrap; }
table.fmt td.nt { color: var(--ink-2); font-size: 13.5px; }
.legend { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 0 0 12px; font-size: 13px; color: var(--ink-2); }

.uses { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; list-style: none; padding: 0; margin: 0; }
.uses li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; font-size: 14.5px; display: flex; gap: 10px; align-items: flex-start; }
.uses li svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }

.prose { max-width: 74ch; }
.prose p { color: var(--ink-2); }
.prose h3 { font: 700 18px/1.3 var(--f-display); margin: 26px 0 6px; }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h3 { margin: 0 0 6px; font: 700 16px/1.3 var(--f-display); }
.card p, .card li { color: var(--ink-2); font-size: 14.5px; }
.card ul { margin: 8px 0 0; padding-left: 18px; }
.limits { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.limit { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.limit b { display: block; font: 700 20px/1.2 var(--f-mono); }
.limit span { font-size: 13px; color: var(--ink-3); }

.faq { display: grid; gap: 8px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.faq summary { cursor: pointer; padding: 14px 16px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 600 18px/1 var(--f-mono); color: var(--ink-3); }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 0 16px 14px; color: var(--ink-2); font-size: 14.5px; }
.faq details > div p { margin: 0 0 8px; }

footer.site { margin-top: 48px; border-top: 1px solid var(--line); background: var(--surface); }
footer.site .wrap { padding-block: 26px; display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; font-size: 13px; color: var(--ink-3); }
footer.site a { color: var(--ink-2); }
footer.site p { margin: 0; max-width: 70ch; }
.result h3 svg { width: 20px; height: 20px; flex: none; }
.panel-h .btn svg { width: 16px; height: 16px; }
@media (max-width: 640px) {
  .hero { padding-block: 16px 4px; }
  .flow { display: none; }
  .hero p.lede { font-size: 14.5px; }
  .tab { padding: 10px 12px 11px; }
  .tab small { font-size: 11.5px; }
}