:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5b5b5b;
  --line: #dcdcd6;
  --accent: #ffcc00;
  --accent-ink: #1a1a1a;
  --ok: #0f7b3f;
  --ok-bg: #e8f5ec;
  --bad: #b3261e;
  --bad-bg: #fbeaea;
  --focus: #1f5fbf;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121212; --surface: #1d1d1d; --text: #f1f1f1; --muted: #b0b0b0; --line: #333;
    --ok: #5fd28f; --ok-bg: #12301f; --bad: #ff8a80; --bad-bg: #3a1614; --focus: #8ab4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.top { background: var(--surface); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 64px; flex-wrap: wrap; }
.mark { width: 28px; height: 28px; background: var(--accent); border-radius: 6px; transform: rotate(45deg) scale(.8); }
.brand { font-weight: 700; }
.tag { color: var(--muted); font-size: 14px; margin-left: auto; }
main { padding-top: 24px; padding-bottom: 48px; display: grid; gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
h1 { font-size: 24px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 0 0 8px; }
.lede { color: var(--muted); margin: 0 0 20px; }
label { display: block; font-weight: 600; margin-bottom: 6px; }
textarea {
  width: 100%; font: 14px/1.4 ui-monospace, Menlo, monospace; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px; resize: vertical;
}
.actions { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
button { font: inherit; font-weight: 600; border-radius: 999px; padding: 12px 22px; cursor: pointer; min-height: 48px; }
.primary { background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent); }
.secondary { background: transparent; color: var(--text); border: 1px solid var(--line); }
button:focus-visible, textarea:focus-visible, a:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.scanner { margin-top: 16px; }
.scanner video { width: 100%; max-height: 360px; background: #000; border-radius: 10px; object-fit: cover; }
.hint { color: var(--muted); font-size: 14px; }
.how ol { padding-left: 20px; margin: 0 0 12px; }
.how li { margin-bottom: 6px; }
.fine { color: var(--muted); font-size: 13px; margin: 0; }

.result { border-radius: var(--radius); padding: 24px; border: 2px solid var(--line); background: var(--surface); }
.result.ok { border-color: var(--ok); background: var(--ok-bg); }
.result.bad { border-color: var(--bad); background: var(--bad-bg); }
.result .status { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 15px; text-transform: uppercase; letter-spacing: .04em; }
.result.ok .status { color: var(--ok); }
.result.bad .status { color: var(--bad); }
.result .icon { width: 32px; height: 32px; flex: none; }
.result .headline { font-size: clamp(24px, 6vw, 34px); font-weight: 800; line-height: 1.2; margin: 12px 0 4px; }
.result .sub { color: var(--muted); margin: 0 0 16px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; }
.checks .dot { flex: none; width: 20px; height: 20px; border-radius: 50%; display: inline-grid; place-items: center; font-size: 13px; font-weight: 800; color: #fff; margin-top: 2px; }
.checks .y { background: var(--ok); }
.checks .n { background: var(--bad); }
.checks small { color: var(--muted); display: block; }
@media (prefers-reduced-motion: no-preference) { .result { animation: in .25s ease-out; } @keyframes in { from { opacity: 0; transform: translateY(-4px); } } }
.visually { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }