:root {
  --ink: #0a0a0a;
  --ink-2: #3a3a3a;
  --mut: #6f6f6f;
  --line: #e7e5e1;
  --paper: #ffffff;
  --paper-2: #f6f5f2;
  --accent: #ff4d00;
  --ok: #0f7a3d;
  --ok-soft: #e7f5ec;
  --bad: #d4001f;
  --bad-soft: #fdecee;
  --warn: #a15c00;
  --warn-soft: #fff4e0;
  --radius: 14px;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--paper); color: var(--ink); }
body { font: 16px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
button, .button, textarea { font: inherit; }

.bar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px max(16px, env(safe-area-inset-left)); background: rgba(255,255,255,.88); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid var(--line); }
.brand { color: var(--ink); text-decoration: none; font-size: 15px; letter-spacing: .01em; }
.brand b { font-weight: 700; }
.mark { color: var(--accent); font-family: var(--mono); font-weight: 700; margin-right: 2px; }
.chip { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--mut); }
.chip.test { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: color-mix(in srgb, var(--accent) 7%, transparent); }

.wrap { max-width: 760px; margin: 0 auto; padding: 20px 16px 48px; }
.hero { margin: 8px 0 20px; }
.kicker { margin: 0 0 6px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
h1 { margin: 0; font-size: clamp(30px, 7vw, 44px); line-height: 1.1; letter-spacing: -.02em; }
.lede { margin: 10px 0 0; color: var(--ink-2); font-size: 16px; }

.seg { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.seg button { flex: none; height: 36px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--paper); color: var(--ink-2); cursor: pointer; }
.seg button[aria-checked="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
textarea { display: block; width: 100%; margin-top: 10px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; resize: vertical; background: var(--paper-2); }
textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.stage { margin-top: 16px; }
.viewport { position: relative; aspect-ratio: 4 / 3; border-radius: var(--radius); overflow: hidden; background: #111; display: grid; place-items: center; }
.viewport video, .viewport .shot, .viewport .shot > * { width: 100%; height: 100%; object-fit: contain; display: block; }
.viewport .shot canvas { width: 100%; height: 100%; object-fit: contain; }
.viewport video[hidden], .viewport [hidden] { display: none !important; }
.empty { position: absolute; inset: 0; display: grid; place-content: center; gap: 14px; text-align: center; color: #d8d8d8; padding: 24px; background: radial-gradient(ellipse at 50% 30%, #262626, #0e0e0e 70%); }
.empty p { margin: 0; }
.scan { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(10,10,10,.28); color: #fff; }
.scan span { position: absolute; left: 0; right: 0; height: 2px; background: var(--accent); box-shadow: 0 0 18px 4px rgba(255,77,0,.55); animation: sweep 1.6s ease-in-out infinite; }
.scan em { font-style: normal; font-family: var(--mono); font-size: 13px; letter-spacing: .08em; padding: 6px 12px; border-radius: 999px; background: rgba(0,0,0,.55); }
@keyframes sweep { 0% { top: 8%; } 50% { top: 92%; } 100% { top: 8%; } }
@media (prefers-reduced-motion: reduce) { .scan span { animation: none; top: 50%; } }

.controls { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
button, .button { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); cursor: pointer; transition: background .15s, border-color .15s, transform .1s; -webkit-tap-highlight-color: transparent; }
button:hover, .button:hover { border-color: #cfcbc4; background: var(--paper-2); }
button:active, .button:active { transform: scale(.98); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none; }
button.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
button.primary:hover { background: #2a2a2a; }
.controls .primary { flex: 1 1 180px; font-weight: 600; }
button:focus-visible, .button:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }

.samples { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 14px; color: var(--mut); font-size: 13px; }
.thumb { width: 64px; height: 48px; padding: 0; overflow: hidden; border-radius: 10px; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }

.alert { margin: 12px 0 0; padding: 10px 14px; border-radius: 12px; background: var(--warn-soft); color: var(--warn); font-size: 14px; }

.result { margin-top: 24px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); }
.verdict { display: inline-flex; align-items: center; gap: 8px; font-size: 24px; font-weight: 700; letter-spacing: .02em; }
.verdict::before { content: ""; width: 12px; height: 12px; border-radius: 50%; background: currentColor; }
.verdict.pass { color: var(--ok); }
.verdict.fail { color: var(--bad); }
.verdict.unsure { color: var(--warn); }
.summary { margin: 8px 0 0; font-size: 16px; }
.findings { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 10px; }
.findings li { display: grid; grid-template-columns: 1fr auto auto; gap: 4px 10px; align-items: baseline; padding: 12px 14px; border-radius: 12px; background: var(--paper-2); }
.findings li p { grid-column: 1 / -1; margin: 0; color: var(--ink-2); font-size: 14px; }
.sev { font-size: 12px; padding: 1px 8px; border-radius: 999px; }
.sev-high { background: var(--bad-soft); color: var(--bad); }
.sev-medium { background: var(--warn-soft); color: var(--warn); }
.sev-low { background: #eef0f3; color: #4a5260; }
.conf { font-family: var(--mono); font-size: 12px; color: var(--mut); }
.meta { margin: 14px 0 0; font-family: var(--mono); font-size: 12px; color: var(--mut); }

.history { margin-top: 28px; }
.history h2 { font-size: 13px; font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--mut); margin: 0 0 10px; }
.history ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.history li { display: grid; gap: 4px; }
.history img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 10px; border: 1px solid var(--line); }
.tag { justify-self: start; font-size: 12px; font-weight: 600; }
.tag.pass { color: var(--ok); } .tag.fail { color: var(--bad); } .tag.unsure { color: var(--warn); }
.history small { color: var(--mut); font-size: 12px; }

.foot { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--mut); font-size: 13px; }
.foot p { margin: 4px 0; }
.foot a { color: var(--ink-2); }