:root{--bg:#f3f5f7;--card:#fff;--text:#1b2733;--muted:#66788a;--brand:#0f766e;--danger:#b42318;--warn:#b54708;--line:#dde3e9}
@media (prefers-color-scheme:dark){:root{--bg:#10171d;--card:#18222b;--text:#e6edf3;--muted:#8b9cad;--brand:#2dd4bf;--danger:#f97066;--warn:#fdb022;--line:#2a3743}}
*{box-sizing:border-box}
body{margin:0;font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;flex-wrap:wrap}
nav{display:flex;gap:4px;flex-wrap:wrap}
.tab{background:none;border:0;padding:8px 12px;border-radius:8px;color:var(--text);font:inherit;cursor:pointer}
.tab.active{background:var(--brand);color:#fff}
@media (prefers-color-scheme:dark){.tab.active{color:#06201c}}
main{max-width:1000px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:16px}
.narrow{max-width:420px;margin-left:auto;margin-right:auto}
h1,h2,h3{margin:.2em 0 .6em}
label{display:block;margin:0 0 12px;font-size:.9rem;color:var(--muted)}
input,select,textarea{display:block;width:100%;margin-top:4px;padding:10px;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:8px}
button,.btn{font:inherit;padding:10px 16px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--text);cursor:pointer;text-decoration:none;display:inline-block}
.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.danger{background:var(--danger);border-color:var(--danger);color:#fff}
@media (prefers-color-scheme:dark){.primary,.danger{color:#06201c}}
.big{width:100%;padding:18px;font-size:1.15rem}
button:disabled{opacity:.6;cursor:wait}
.timer{font-size:2.4rem;font-variant-numeric:tabular-nums;text-align:center;margin:.2em 0}
.muted{color:var(--muted)}.small{font-size:.85rem}
.warn{color:var(--warn);font-weight:600}
.msg{min-height:1.3em;color:var(--danger)}.msg.ok{color:var(--brand)}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.row label{flex:1 1 150px;margin:0}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line);white-space:nowrap;vertical-align:top}
td.wrap{white-space:normal;min-width:180px}
th{color:var(--muted);font-weight:600}
a{color:var(--brand)}
[hidden]{display:none!important}