:root{
  --bg:#f4f6f9;--card:#fff;--ink:#1a2233;--muted:#5a6478;--line:#e2e7f0;
  --brand:#2f5fd0;--brand-dark:#1f3f8f;--brand-soft:#e8effc;
  --ok:#1d8a50;--ok-soft:#e5f7ee;--amber:#b26a00;--amber-soft:#fff3dd;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Segoe UI","Nirmala UI","Mangal","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;font-size:16px}
a{color:var(--brand)}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}
header{background:linear-gradient(135deg,#1f3f8f 0%,#2f5fd0 62%,#4a7de0 100%);color:#fff;padding:20px 0 18px;box-shadow:0 3px 14px rgba(15,35,80,.22)}
header h1{font-size:1.35rem}
header p{font-size:.82rem;opacity:.9;margin-top:2px}
header nav{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
header nav a{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);border-radius:8px;padding:5px 10px;font-size:.75rem;font-weight:700}
header nav a:hover{background:rgba(255,255,255,.22)}
main{padding:22px 0 60px}
.lb-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.tabs{display:flex;gap:7px;flex-wrap:wrap}
.tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 13px;font-size:.82rem;font-weight:700;cursor:pointer;color:var(--ink)}
.tab.active{background:var(--brand-soft);border-color:#c7d2fe;color:var(--brand)}
.refresh{margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 11px;font-size:.78rem;font-weight:700;cursor:pointer;color:var(--ink)}
.refresh:hover{border-color:#b9c8e8;background:#f8faff}
.msg{font-size:.82rem;border-radius:9px;padding:8px 11px;margin-bottom:12px}
.msg.error{background:#fdeceb;border:1px solid #f3b9b3;color:#c0392b}
.msg.info{background:var(--brand-soft);border:1px solid #cfdefb;color:var(--brand-dark)}
.msg[hidden]{display:none!important}
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:auto;box-shadow:0 1px 3px rgba(30,50,90,.05)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:.85rem}
th{font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);background:#fafbfe}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#f8faff}
.rank{width:58px;font-weight:800;color:var(--muted)}
.top1 .rank{color:#b8860b}.top2 .rank{color:#6b7280}.top3 .rank{color:#a05a2c}
.name{font-weight:700}
.score{font-weight:800;color:var(--brand-dark)}
.percent{color:var(--muted)}
.time{font-variant-numeric:tabular-nums;font-weight:700}
.empty{text-align:center;color:var(--muted);padding:28px 12px}
.note{font-size:.76rem;color:var(--muted);margin-top:10px}
@media(max-width:640px){
  header h1{font-size:1.1rem}
  .refresh{margin-left:0}
}