:root{--bg:#fbfbfa;--fg:#1d1f21;--muted:#5b6168;--card:#fff;--line:#dfe2e5;--accent:#0e7c66;--accent-fg:#fff;--code:#f1f3f4;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#131517;--fg:#e6e7e8;--muted:#9aa1a8;--card:#1c1f22;--line:#30353a;--accent:#3cc4a3;--accent-fg:#06231c;--code:#24282c}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
header.top{border-bottom:1px solid var(--line);background:var(--card)}
header nav{max-width:960px;margin:0 auto;padding:.7rem 1rem;display:flex;flex-wrap:wrap;gap:1.1rem;align-items:center}
header nav a{text-decoration:none;color:var(--muted)}
header nav a.brand{color:var(--fg);font-weight:700;margin-right:auto}
main{max-width:960px;margin:0 auto;padding:1.5rem 1rem 3rem}
h1{font-size:2rem;line-height:1.25;margin:.5rem 0}
h2{margin-top:2rem;font-size:1.35rem}
.lead{font-size:1.12rem;color:var(--muted)}
.note{color:var(--muted);font-size:.95rem;border-left:3px solid var(--line);padding-left:.8rem}
code{background:var(--code);padding:.1em .3em;border-radius:4px;font-size:.92em}
.cards{list-style:none;padding:0;display:grid;gap:.8rem}
.cards li{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.8rem 1rem}
.btn,button{display:inline-block;background:var(--accent);color:var(--accent-fg);border:1px solid var(--accent);border-radius:8px;padding:.5rem 1rem;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
button.ghost{background:transparent;color:var(--accent)}
.btn.disabled{background:transparent;color:var(--muted);border-color:var(--line);cursor:default}
.shots{display:grid;gap:1rem}
.shots img{width:100%;height:auto;border:1px solid var(--line);border-radius:8px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem;margin:1rem 0}
.panel label{display:inline-flex;gap:.4rem;align-items:center;font-size:.95rem}
.panel>label{display:block;font-weight:600;margin:.6rem 0 .3rem}
textarea,input,select{font:14px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--bg);color:var(--fg);border:1px solid var(--line);border-radius:6px;padding:.4rem}
textarea{width:100%;resize:vertical}
.row{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;margin:.6rem 0}
.status{min-height:1.4em;color:var(--muted);margin:.3rem 0;font-size:.95rem}
.status.err{color:#c0392b}
.swatches{display:flex;flex-wrap:wrap;gap:.4rem}
.swatches span{display:inline-flex;align-items:flex-end;width:5.5rem;height:3.2rem;border-radius:6px;border:1px solid var(--line);font:11px ui-monospace,monospace;padding:.2rem;overflow:hidden}
.swatches span b{background:rgba(255,255,255,.85);color:#111;padding:0 .2rem;border-radius:3px;font-weight:400}
.cta{background:var(--card);border:1px solid var(--accent);border-radius:10px;padding:.8rem 1rem}
.faq details{border-bottom:1px solid var(--line);padding:.6rem 0}
.faq summary{cursor:pointer;font-weight:600}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer p{max-width:960px;margin:0 auto;padding:1.2rem 1rem}
.contrast{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:1rem;align-items:start;margin:.6rem 0}
@media (max-width:640px){.contrast{grid-template-columns:1fr}}
.preview{border:1px solid var(--line);border-radius:8px;padding:.8rem 1rem}
.preview p{margin:.3rem 0}.preview .big{font-size:24px}
.preview .ui{display:inline-block;border:2px solid currentColor;border-radius:6px;padding:.2rem .6rem;font-size:.9rem}
.ratio{font-size:2rem;font-weight:700;margin:0}
.checks{list-style:none;padding:0;margin:.3rem 0}.checks li{padding:.1rem 0}
.checks .pass b{color:#1e7e34}.checks .fail b{color:#c0392b}.checks .warn b{color:#a35a00}
@media (prefers-color-scheme:dark){.checks .pass b{color:#5fd07a}.checks .fail b{color:#ff7b6b}.checks .warn b{color:#f0b350}}
.mdpreview{width:100%;min-height:16rem;border:1px solid var(--line);border-radius:8px;background:#fff;resize:vertical}
.issues{margin:.2rem 0;padding-left:1.2rem;font-size:.93rem;color:var(--muted)}.issues:empty{display:none}.issues .err{color:#c0392b}
@media (prefers-color-scheme:dark){.issues .err{color:#ff7b6b}}
[hidden]{display:none!important}
.kv{border-collapse:collapse;width:100%;margin:.4rem 0;font-size:.93rem}.kv th,.kv td{border:1px solid var(--line,#8884);padding:.25rem .45rem;text-align:left;vertical-align:top;word-break:break-all}
.kv th{font-weight:600}.kv td code{white-space:pre-wrap}.kv .err{color:#c0392b}.kv button{padding:.1rem .45rem;font-size:.8rem}
@media (prefers-color-scheme:dark){.kv .err{color:#ff7b6b}}