/* ===== Converter v2 (Olivia Bennett mockup 2026-10-15). Palettes: the ONLY place colours are defined. theme.js sets data-theme; the media block covers no-JS. ===== */
:root,:root[data-theme=light]{--page:#f4f5f8;--card:#fff;--border:#7a8496;--line:#d5d9e1;--text:#141821;--muted:#4a5263;--accent:#1c449c;--accent-ink:#fff;--soft:#e9edf6;--ok:#1b6b3a;--dis:#7a8496;--dis-ink:#fff;--flag-bg:#fff3c4;--flag:#5c4300;--err:#b42318;--note:#fff8e1;--note-fg:#141821;--note-line:#c9a227;--code-bg:#e9edf6;color-scheme:light}
:root[data-theme=dark]{--page:#10131a;--card:#181c25;--border:#7d879a;--line:#2c3240;--text:#eef0f4;--muted:#b4bbc8;--accent:#8fb0ff;--accent-ink:#0b1430;--soft:#1d2a4a;--ok:#6fd39a;--dis:#5a6272;--dis-ink:#eef0f4;--flag-bg:#3d3110;--flag:#ffd970;--err:#ff8f86;--note:#2a2410;--note-fg:#f2d27a;--note-line:#6b5a22;--code-bg:#232838;color-scheme:dark}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--page:#10131a;--card:#181c25;--border:#7d879a;--line:#2c3240;--text:#eef0f4;--muted:#b4bbc8;--accent:#8fb0ff;--accent-ink:#0b1430;--soft:#1d2a4a;--ok:#6fd39a;--dis:#5a6272;--dis-ink:#eef0f4;--flag-bg:#3d3110;--flag:#ffd970;--err:#ff8f86;--note:#2a2410;--note-fg:#f2d27a;--note-line:#6b5a22;--code-bg:#232838;color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;touch-action:manipulation}
body{margin:0;background:var(--page);color:var(--text);font:400 1rem/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","PingFang SC","Microsoft YaHei",sans-serif}
:lang(zh){line-height:1.7}
a{color:var(--accent)}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
.wrap{max-width:920px;margin:0 auto;padding:0 20px}
h1,h2{text-wrap:balance}
.mt{background:var(--soft);border-bottom:1px solid var(--line);font-size:.9375rem}
.mt .wrap{display:flex;flex-wrap:wrap;gap:0 12px;align-items:center;padding-top:4px;padding-bottom:4px}
.mt a{display:inline-flex;align-items:center;min-height:44px}
.top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;padding-top:16px;padding-bottom:8px}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-weight:700;font-size:1.0625rem;color:var(--text);text-decoration:none}
.brand svg{width:28px;height:28px;fill:var(--accent);stroke:var(--accent-ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.brand svg path{fill:none}
.prefs{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px}
.langs{display:flex;gap:2px;list-style:none;margin:0;padding:0}
.langs a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:0 10px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:.9375rem;white-space:nowrap}
.langs a:hover{color:var(--text);background:var(--card)}
.langs a[aria-current]{color:var(--text);font-weight:600;box-shadow:inset 0 -2px 0 var(--accent);border-radius:8px 8px 0 0}
.theme{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;font-size:.9375rem}
.hint{color:var(--muted);font-size:.8125rem}
select{min-height:44px;padding:0 12px;border:1px solid var(--border);border-radius:8px;background-color:var(--card);color:var(--text);font:inherit}
.hero{padding:24px 0 16px}
.hero h1{margin:0 0 8px;font-size:clamp(1.75rem,4.4vw,2.5rem);line-height:1.15;letter-spacing:-.015em}
.lede{margin:0;font-size:clamp(1rem,2vw,1.125rem);color:var(--muted);max-width:44em}
.pnote{margin:8px 0 0;color:var(--muted);font-size:.9375rem}
.drop{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding:32px 16px;margin-bottom:16px;text-align:center;background:var(--card);border:2px dashed var(--border);border-radius:12px;cursor:pointer}
.drop:hover{border-color:var(--accent);background:var(--soft)}
.drop:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}
.drop input{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}
.pills{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;list-style:none;margin:0;padding:0}
.pills li{padding:1px 10px;border:1px solid var(--border);border-radius:99px;font-size:.8125rem;font-weight:500;color:var(--muted)}
.dt{font-size:clamp(1.25rem,3vw,1.5rem);font-weight:600;color:var(--accent);max-width:100%}
.ds{color:var(--muted);font-size:.9375rem}
.hn{max-width:36em;padding:6px 12px;border-radius:8px;background:var(--page);color:var(--muted);font-size:.875rem}
.controls{padding:20px;margin-bottom:16px;background:var(--card);border:1px solid var(--border);border-radius:12px}
.fields{display:flex;flex-wrap:wrap;gap:12px 32px;margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field>label{font-size:.875rem;font-weight:500;color:var(--muted)}
#fmt{min-width:180px}
.qrow{display:flex;align-items:center;gap:12px;min-height:44px;flex-wrap:wrap}
input[type=range]{width:240px;max-width:100%;height:44px;margin:0;accent-color:var(--accent)}
.qv{display:inline-block;width:3.2em;font-weight:600;font-variant-numeric:tabular-nums}
.bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 16px}
.status{margin:0;color:var(--muted);font-size:.9375rem}
.actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px;margin-left:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:8px;font-family:inherit;font-weight:600;font-size:1rem;line-height:1.2;cursor:pointer;border:1px solid var(--border);background:var(--card);color:var(--accent)}
.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn:hover:not(:disabled){filter:brightness(1.1)}
.btn.sec:hover:not(:disabled){background:var(--soft)}
.btn:disabled{cursor:not-allowed;background:var(--dis);border-color:var(--dis);color:var(--dis-ink)}
.btn.sec:disabled{background:transparent;color:var(--muted);border-style:dashed}
.btn.sm{min-height:36px;padding:0 14px;font-size:.9375rem}
.list{margin-bottom:16px;background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.lh{margin:0;color:var(--text);padding:10px 16px;background:var(--page);font-size:.875rem;font-weight:600}
.list ul{list-style:none;margin:0;padding:0}
.row{display:flex;align-items:center;gap:12px;padding:10px 8px 10px 16px;border-top:1px solid var(--line)}
.meta{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}
.fn{font-weight:500;overflow-wrap:anywhere}
.sub{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:var(--muted);font-size:.8125rem}
.pill{padding:0 8px;border-radius:99px;background:var(--soft);color:var(--accent);font-weight:600;font-size:.75rem}
.rs{font-size:.875rem}
.ok{color:var(--ok);font-weight:500;white-space:nowrap}
.muted{color:var(--muted)}
.rm{flex:none;display:grid;place-items:center;width:44px;height:44px;border:0;border-radius:8px;background:transparent;color:var(--muted);cursor:pointer}
.rm:hover{background:var(--soft);color:var(--text)}
.rm svg{width:20px;height:20px;stroke:currentColor;stroke-width:2;stroke-linecap:round;fill:none}
.lim{margin-bottom:24px;background:var(--card);border:1px solid var(--border);border-radius:8px}
.lim summary{display:flex;align-items:center;min-height:44px;padding:0 16px;color:var(--accent);font-weight:500;cursor:pointer}
.lim p{margin:0;padding:0 16px 12px;color:var(--muted);font-size:.9375rem}
.pop h2{margin:0 0 10px;font-size:1.125rem}
.pairs{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.pairs a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:var(--card);font-weight:500;font-size:.9375rem;text-decoration:none;white-space:nowrap}
.pairs a:hover{background:var(--soft)}
footer{margin-top:16px;padding-top:24px;border-top:1px solid var(--line);padding-bottom:32px;font-size:.8125rem;color:var(--muted)}
footer p{margin:0 0 8px;max-width:60em}
.flinks{display:flex;flex-wrap:wrap;gap:0 16px;list-style:none;margin:0;padding:0}
.flinks a{display:inline-flex;justify-content:center;min-width:44px;align-items:center;min-height:44px;font-size:.875rem;font-weight:500}
.lede-m,.more{display:none}
@media (min-width:600px){
 .top{flex-wrap:nowrap;min-height:76px;padding-top:12px;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:8px}
 .prefs{flex-wrap:nowrap;gap:12px}
 .theme{flex-wrap:nowrap;gap:8px;padding-left:12px;border-left:1px solid var(--line);min-height:44px}
 .theme label{color:var(--muted)}
 .theme select{min-height:40px;font-size:.9375rem}
}
.more{margin-bottom:24px;background:var(--card);border:1px solid var(--border);border-radius:8px}
.more summary{display:flex;align-items:center;min-height:44px;padding:0 16px;color:var(--accent);font-weight:500;cursor:pointer}
.more p{margin:0;padding:0 16px 12px;color:var(--muted);font-size:.9375rem}
@media (max-width:599px){
 .lede,.pnote,.hn,.ds,.lim,.foot-x{display:none}
 .lede-m{display:block;margin:0;color:var(--muted)}
 .more{display:block}
 .hero{padding:16px 0 12px}
 .drop{padding:20px 12px}
 .wrap{padding:0 16px}
 .top{flex-direction:column;align-items:stretch}
 .prefs{justify-content:space-between}
 .field{flex:1 1 100%}
 #fmt{width:100%}
 input[type=range]{flex:1}
 .actions{display:grid;grid-template-columns:1fr;width:100%;margin-left:0}
 .actions .pri{grid-column:1/-1}
 .btn.sm{min-height:44px;padding:0 10px}
 .fn{font-size:.875rem}
 .row{gap:8px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
/* ===== doc pages (privacy, licences) and runtime states ===== */
main.wrap>h1{margin:24px 0 8px;font-size:clamp(1.75rem,4.4vw,2.25rem);line-height:1.2}
main.wrap>h2,main.wrap section:not(.list):not(.pop)>h2{font-size:1.25rem;margin:28px 0 10px}
.note{color:var(--note-fg);background:var(--note);border:1px solid var(--note-line);padding:10px 14px;border-radius:8px;font-size:.875rem;margin:12px 0}
code{background:var(--code-bg);padding:1px 4px;border-radius:4px}
.err{color:var(--err)}
.drop.over{border-color:var(--accent);border-style:solid;background:var(--soft)}
.row .btn.sm{text-decoration:none;flex:none}
.pop{margin-bottom:8px}
.pop h2{margin-top:0}
.rs .ok{white-space:normal}