:root{
  --bg:#12151a; --panel:#1a1f27; --line:#2a323d; --fg:#e6edf3; --dim:#93a1b1;
  --accent:#4da3ff; --good:#3fb950; --bad:#f85149; --warn:#d29922;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:14px/1.6 system-ui,"Microsoft YaHei",sans-serif}
header{display:flex;align-items:center;gap:24px;padding:12px 20px;
  border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:10}
h1{font-size:16px;margin:0;font-weight:600}
nav a{color:var(--dim);text-decoration:none;margin-right:16px;padding:4px 0;border-bottom:2px solid transparent}
nav a:hover{color:var(--fg)}
nav a.on{color:var(--accent);border-bottom-color:var(--accent)}
main{padding:20px;max-width:1400px;margin:0 auto}
h2{font-size:15px;margin:0 0 12px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px;margin-bottom:16px}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--dim);font-weight:500;font-size:13px}
button{background:var(--accent);color:#06131f;border:0;border-radius:6px;padding:7px 14px;
  cursor:pointer;font:inherit;font-weight:600}
button:hover{filter:brightness(1.1)}
button.ghost{background:transparent;color:var(--fg);border:1px solid var(--line);font-weight:400}
button.bad{background:var(--bad);color:#fff}
button.good{background:var(--good);color:#06200c}
button:disabled{opacity:.45;cursor:not-allowed}
input,textarea,select{background:#0e1116;color:var(--fg);border:1px solid var(--line);
  border-radius:6px;padding:7px 10px;font:inherit;width:100%}
textarea{resize:vertical;min-height:60px}
label{display:block;margin-bottom:10px}
label span{display:block;color:var(--dim);font-size:12px;margin-bottom:4px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:flex-end}
.row>*{flex:1;min-width:150px}
.row>.narrow{flex:0 0 auto;min-width:0}
.stats{display:flex;gap:14px;flex-wrap:wrap}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 18px;min-width:110px}
.stat b{display:block;font-size:22px;line-height:1.2}
.stat span{color:var(--dim);font-size:12px}
.dim{color:var(--dim)}
.good{color:var(--good)} .bad{color:var(--bad)} .warn{color:var(--warn)}
pre.log{background:#0e1116;border:1px solid var(--line);border-radius:6px;padding:10px;
  max-height:260px;overflow:auto;font-size:12px;margin:0;white-space:pre-wrap}
.task{display:grid;grid-template-columns:420px 1fr;gap:16px;
  border:1px solid var(--line);border-radius:8px;background:var(--panel);padding:14px;margin-bottom:14px}
.task img{width:100%;border-radius:6px;background:#000;display:block;cursor:zoom-in}
.task .noimg{width:100%;aspect-ratio:16/10;border:1px dashed var(--line);border-radius:6px;
  display:flex;align-items:center;justify-content:center;color:var(--dim);font-size:13px;text-align:center;padding:10px}
.meta{font-size:13px}
.meta dt{color:var(--dim);font-size:12px;margin-top:8px}
.meta dd{margin:2px 0 0}
.tag{display:inline-block;background:#0e1116;border:1px solid var(--line);border-radius:4px;
  padding:1px 7px;margin:2px 4px 2px 0;font-size:12px}
.badge{display:inline-block;border-radius:4px;padding:1px 8px;font-size:12px;font-weight:600}
.badge.correct{background:rgba(63,185,80,.18);color:var(--good)}
.badge.wrong{background:rgba(248,81,73,.18);color:var(--bad)}
#toast{position:fixed;right:20px;bottom:20px;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;padding:10px 16px;box-shadow:0 6px 24px rgba(0,0,0,.5)}
.pager{display:flex;gap:10px;align-items:center;justify-content:center;margin:16px 0}
dialog{background:var(--panel);color:var(--fg);border:1px solid var(--line);border-radius:10px;
  max-width:92vw;padding:0}
dialog img{max-width:90vw;max-height:88vh;display:block}
dialog::backdrop{background:rgba(0,0,0,.75)}
.proc{grid-column:1 / -1;margin-top:12px;border-top:1px solid var(--line);padding-top:12px}
.proc h3{font-size:13px;color:var(--dim);margin:14px 0 6px;font-weight:600}
.proc-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.call{border:1px solid var(--line);border-radius:6px;padding:10px;margin-bottom:10px;background:#0e1116}
.callhead{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
details{margin-top:6px}
summary{cursor:pointer;color:var(--accent);font-size:13px;user-select:none}
summary:hover{filter:brightness(1.15)}
.piece{border:1px solid var(--line);border-radius:6px;padding:12px;margin-bottom:10px;background:#0e1116}
.piecehead{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.piecehead b{flex:0 0 auto}
.piecehead .dim{flex:1}
code{background:#0e1116;border:1px solid var(--line);border-radius:4px;padding:1px 6px;font-size:12px}
a{color:var(--accent)}
.diff{border:1px solid var(--line);border-radius:6px;overflow:auto;max-height:420px;font-size:12px;
  font-family:ui-monospace,Consolas,monospace;background:#0b0e13}
.dl{padding:2px 10px;white-space:pre-wrap;word-break:break-all}
.dl.del{background:rgba(248,81,73,.12);color:#ffb3ae}
.dl.add{background:rgba(63,185,80,.12);color:#9ff0a8}