:root{color-scheme:light dark;--bg: #f7f8fa;--surface: #fff;--text: #16202c;--muted: #5b6573;--border: #dde2e8;--accent: #0b6e4f;--serious: #b42318;--serious-soft: #fdecea;--mark: #fff1a8;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #0f141a;--surface: #17202a;--text: #e6ebf0;--muted: #9aa5b1;--border: #2a3542;--accent: #4cc39a;--serious: #ff8a80;--serious-soft: #3a1c1a;--mark: #5c4d00}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);line-height:1.55}main{max-width:820px;margin:0 auto;padding:40px 20px 64px}h1{margin:0;font-size:clamp(26px,4vw,34px)}.lead{margin:6px 0 24px;color:var(--muted)}a{color:var(--accent)}.panel,.pair{padding:20px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.search{position:relative;display:grid;gap:6px;font-weight:600}input{height:46px;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font:inherit;font-weight:400}input:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.options{position:absolute;top:100%;right:0;left:0;z-index:2;margin:4px 0 0;padding:4px;border:1px solid var(--border);border-radius:8px;background:var(--surface);list-style:none;font-weight:400}.options li{padding:8px 10px;border-radius:6px;cursor:pointer}.options li[aria-selected=true],.options li:hover{background:var(--bg)}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0;padding:0;list-style:none}.chips li{display:inline-flex;align-items:center;gap:6px;padding:4px 6px 4px 12px;border:1px solid var(--border);border-radius:999px}.chips button{width:24px;height:24px;border:0;border-radius:50%;background:var(--bg);color:var(--text);cursor:pointer}.primary{margin-top:16px;height:44px;padding:0 20px;border:0;border-radius:8px;background:var(--accent);color:#fff;font:inherit;font-weight:600;cursor:pointer}.primary:disabled{opacity:.55;cursor:default}h2{margin:32px 0 12px;font-size:20px}.pair+.pair{margin-top:12px}.pair.serious{border-left:4px solid var(--serious)}.pair h3{margin:0 0 8px;font-size:17px}.where{margin:12px 0 4px;color:var(--muted);font-size:14px}.section{padding:1px 8px;border-radius:999px;background:var(--bg);color:var(--text);font-weight:600}.section.strong{background:var(--serious-soft);color:var(--serious)}blockquote{margin:6px 0;padding:8px 12px;border-left:3px solid var(--border);font-size:15px}mark{border-radius:3px;background:var(--mark);color:inherit}.duplicate{padding:12px 14px;border-left:4px solid var(--serious);border-radius:8px;background:var(--serious-soft)}.clear,.warn{color:var(--muted)}.error{color:var(--serious)}footer{margin-top:40px;color:var(--muted);font-size:14px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.secondary{margin-top:20px;height:40px;padding:0 16px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:inherit;cursor:pointer}.example{margin:12px 0 0;color:var(--muted);font-size:14px}button.link{padding:0;border:0;background:none;color:var(--accent);font:inherit;text-decoration:underline;cursor:pointer}@media print{:root{--bg: #fff;--surface: #fff;--text: #000}.search,.chips button,.primary,.secondary,.example{display:none}.panel,.pair{border-color:#999;break-inside:avoid}a[href]:after{content:" (" attr(href) ")";font-size:11px;word-break:break-all}}h2:focus{outline:none}.how{margin-top:32px;padding:14px 18px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.how summary{font-weight:600;cursor:pointer}.how li+li{margin-top:6px}.recent{margin-top:16px;color:var(--muted);font-size:14px}.recent p{margin:0 0 4px}.recent ul{margin:0 0 6px;padding-left:18px}button.link.muted{color:var(--muted)}