:root{--bg:#fbfaf7;--fg:#16181d;--mute:#5b6270;--line:#e3e1db;--card:#ffffff;--acc:#0b6e4f;--acc2:#e9f4ef;--bad:#b42318;--ok:#0b6e4f;--warn:#9a6700;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#121417;--fg:#eceef2;--mute:#a3a9b5;--line:#2a2e35;--card:#1a1d22;--acc:#4cc38a;--acc2:#16271f;--bad:#ff6b5f;--ok:#4cc38a;--warn:#e3b341;color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg)}
body{font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding:0 16px}
.wrap{max-width:860px;margin:0 auto}
header.site{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
header.site a.brand{font-weight:800;color:var(--fg);text-decoration:none;font-size:1.1rem}
header.site nav a{color:var(--mute);text-decoration:none;margin-left:14px;font-size:.92rem}
main{padding:18px 0 40px}
h1{font-size:1.75rem;line-height:1.25;margin:10px 0 8px}
h2{font-size:1.25rem;margin:30px 0 8px}
h3{font-size:1.05rem;margin:20px 0 6px}
p,li{color:var(--fg)}
.lead{color:var(--mute);font-size:1.05rem}
a{color:var(--acc)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:16px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.card h3{margin:0 0 6px}
.card .meta{font-size:.85rem;color:var(--mute)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:48px;padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--fg);font:inherit;font-weight:700;text-decoration:none;cursor:pointer}
.btn.pri{background:var(--acc);border-color:var(--acc);color:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
th{color:var(--mute);font-weight:600}
.tbl{overflow-x:auto}
.note{background:var(--acc2);border-radius:12px;padding:12px 14px;font-size:.92rem}
.warn{border-left:4px solid var(--warn);padding:8px 12px;background:var(--card);font-size:.92rem}
blockquote{margin:8px 0;padding:6px 12px;border-left:3px solid var(--line);color:var(--mute);font-size:.92rem}
footer.site{border-top:1px solid var(--line);padding:18px 0 40px;color:var(--mute);font-size:.85rem}
footer.site a{color:var(--mute);margin-right:12px}
/* tool */
.tool{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;margin:12px 0}
.tool label.f{display:block;font-weight:600;margin:8px 0 4px}
.tool select{width:100%;min-height:48px;font:inherit;padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--fg)}
.inputs{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}
.inputs label{flex:1 1 160px}
.inputs input{display:none}
.sw{display:inline-flex;align-items:center;gap:6px;margin:4px 12px 4px 0;font-size:.92rem}
.sw i{width:22px;height:22px;border-radius:6px;border:1px solid var(--line);display:inline-block}
#specInfo{font-size:.88rem;color:var(--mute);margin:6px 0}
#status{min-height:1.6em;font-size:.95rem;margin:8px 0}
#status[data-kind=bad]{color:var(--bad)}
#status[data-kind=ok]{color:var(--ok)}
.res{display:flex;gap:18px;flex-wrap:wrap;align-items:flex-start}
#preview{border:1px solid var(--line);background:#fff;max-width:100%;height:auto}
#checks{list-style:none;padding:0;margin:0;font-size:.92rem}
#checks li.ok{color:var(--ok)}#checks li.bad{color:var(--bad)}
.dl{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.small{font-size:.82rem;color:var(--mute)}
#kinds .btn.on{background:var(--acc);border-color:var(--acc);color:#fff}
.rc{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-start;margin-top:10px}
.rcview{position:relative;flex:1 1 320px;max-width:640px;border-radius:12px;overflow:hidden;background:#000}
.rcview video,.rcview canvas{display:block;width:100%;height:auto;transform:scaleX(-1)}
.rcview canvas{position:absolute;inset:0;height:100%}
.rcpanel{flex:1 1 200px;text-align:center}
.rcnum{font-size:5rem;font-weight:900;line-height:1;font-variant-numeric:tabular-nums}
.rcbar{height:12px;background:var(--line);border-radius:6px;overflow:hidden;margin:10px 0}
.rcbar i{display:block;height:100%;width:0;background:var(--acc);transition:width .2s}
.rccue{min-height:1.6em;font-size:1.25rem;font-weight:700;color:var(--warn)}
#ptModes .btn.on{background:var(--acc);border-color:var(--acc);color:#fff}
.ptbig{text-align:center;margin:12px 0 4px}
#ptNoteBig{font-size:4.5rem;font-weight:900;line-height:1}
#ptCents{font-size:1.3rem;font-weight:700}
.ptmeter{display:flex;align-items:center;gap:8px;font-size:.75rem;color:var(--mute)}
.ptscale{position:relative;flex:1;height:26px;background:var(--line);border-radius:13px}
.ptzone{position:absolute;left:25%;right:25%;top:0;bottom:0;background:color-mix(in srgb,var(--ok) 30%,transparent);border-radius:13px}
#ptNeedle{position:absolute;top:-4px;bottom:-4px;width:6px;margin-left:-3px;left:50%;border-radius:3px;background:var(--warn);transition:left .08s}
#ptNeedle.ok{background:var(--ok)}
#ptGraph{width:100%;height:auto;margin-top:12px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
/* long official URLs and verbatim quotes must wrap on phones */
main{overflow-wrap:break-word}
main a,main td,blockquote{overflow-wrap:anywhere}
[hidden]{display:none!important}