:root {
  --bg: #f0f2f5;
  --card: #ffffff;
  --nav: #0d2b4e;
  --blue: #1d4ed8;
  --blue-soft: #eff6ff;
  --green: #15803d;
  --green-soft: #f0fdf4;
  --red: #b91c1c;
  --red-soft: #fef2f2;
  --amber: #d97706;
  --amber-soft: #fffbeb;
  --muted: #6b7280;
  --line: #e5e7eb;
  --ink: #111827;
  --gold: #f8d76b;
  --silver: #d8dee9;
  --bronze: #d49a5b;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Aptos, "Segoe UI", Tahoma, sans-serif; }
button, input, select { font: inherit; }
.header { background: var(--nav); color: white; padding: 18px 26px 0; box-shadow: 0 8px 24px rgba(15, 23, 42, .18); }
.header-inner { display:flex; justify-content:space-between; gap:18px; align-items:flex-start; flex-wrap:wrap; }
.brand img { width: min(285px, 70vw); background:white; display:block; margin-bottom:8px; }
.brand h1 { margin: 0; font-size: 20px; line-height: 1.2; }
.brand p { margin: 4px 0 0; color: rgba(255,255,255,.72); font-size: 13px; }
.header-actions { display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.header-actions select, .header-actions button { border:0; border-radius:9px; padding:10px 13px; }
.header-actions button { color:white; background:#dc2626; font-weight:800; cursor:pointer; }
.nav { display:flex; gap:4px; margin-top:16px; overflow:auto; }
.nav button { border:0; background:transparent; color:white; padding:14px 18px; border-radius:9px 9px 0 0; cursor:pointer; font-weight:700; white-space:nowrap; }
.nav button.active { background:#f59e0b; color:#061426; }
.main { padding: 24px clamp(14px, 2vw, 28px) 40px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:14px; padding:18px; box-shadow:0 10px 24px rgba(15,23,42,.04); }
.login-wrap { min-height:100vh; display:grid; place-items:center; padding:22px; background: radial-gradient(circle at 18% 10%, rgba(13,43,78,.12), transparent 28rem), var(--bg); }
.login-card { width:min(430px,100%); text-align:center; }
.login-logo { width:96px; height:96px; object-fit:contain; margin-bottom:12px; }
.login-card h1 { margin:0; color:var(--nav); font-size:34px; }
.login-card p { color:var(--muted); margin:8px 0 20px; }
.field { display:grid; gap:7px; margin-bottom:12px; text-align:left; }
.field label { font-weight:800; color:#374151; font-size:13px; }
.input, .select { width:100%; border:1px solid var(--line); border-radius:10px; padding:10px 12px; background:white; color:var(--ink); outline:none; }
.input:focus, .select:focus { border-color:#93c5fd; box-shadow:0 0 0 3px rgba(59,130,246,.15); }
.btn { border:0; border-radius:10px; padding:11px 16px; background:var(--blue); color:white; font-weight:800; cursor:pointer; display:inline-flex; gap:8px; align-items:center; justify-content:center; text-decoration:none; }
.btn.secondary { background:#eef2f7; color:#111827; border:1px solid var(--line); }
.btn.green { background:var(--green); }
.btn.red { background:var(--red); }
.btn.amber { background:var(--amber); }
.btn:disabled { opacity:.45; cursor:not-allowed; }
.grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap:14px; }
.upload-box { border:2px dashed #cbd5e1; border-radius:14px; padding:18px; background:#fbfdff; transition:.16s; }
.upload-box.drag { border-color:var(--blue); background:var(--blue-soft); }
.upload-box strong { display:block; margin-bottom:7px; }
.file-name { color:var(--green); font-size:13px; margin-top:8px; font-weight:700; word-break:break-word; }
.summary { display:flex; gap:10px; flex-wrap:wrap; margin:14px 0; }
.badge { border-radius:999px; padding:5px 11px; font-size:12px; font-weight:800; display:inline-flex; gap:5px; align-items:center; background:#f3f4f6; color:var(--muted); }
.badge.blue { background:var(--blue-soft); color:#1e40af; }
.badge.green { background:var(--green-soft); color:#166534; }
.badge.red { background:var(--red-soft); color:#991b1b; }
.badge.amber { background:var(--amber-soft); color:#92400e; }
.tabs { display:flex; gap:6px; flex-wrap:wrap; margin:18px 0 12px; }
.tabs button { border:1px solid var(--line); background:white; color:#374151; border-radius:999px; padding:9px 13px; cursor:pointer; font-weight:800; }
.tabs button.active { background:var(--nav); color:white; border-color:var(--nav); }
.table-wrap { overflow:auto; border:1px solid var(--line); border-radius:12px; }
table { width:100%; border-collapse:collapse; font-size:13px; }
th { background:#eef2f7; color:#475569; text-align:left; padding:10px; white-space:nowrap; }
td { padding:9px 10px; border-top:1px solid var(--line); vertical-align:top; }
tr:nth-child(even) td { background:#fafbfc; }
.rank { font-weight:900; color:var(--nav); }
.medal-1 td { background: rgba(248,215,107,.24) !important; }
.medal-2 td { background: rgba(216,222,233,.36) !important; }
.medal-3 td { background: rgba(212,154,91,.24) !important; }
.group-title { display:flex; align-items:center; justify-content:space-between; gap:10px; flex-wrap:wrap; margin:0 0 10px; }
.overview-group { margin-bottom:16px; }
.excluded { margin-top:18px; display:grid; gap:12px; }
.excluded .card { background:#fff; box-shadow:none; }
.notice { padding:12px 14px; border-radius:12px; background:var(--amber-soft); color:#92400e; border:1px solid #fde68a; }
.error { padding:12px 14px; border-radius:12px; background:var(--red-soft); color:#991b1b; border:1px solid #fecaca; margin:10px 0; }
.archive-list { display:grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap:12px; }
.archive-item { display:flex; justify-content:space-between; gap:10px; align-items:center; text-decoration:none; color:inherit; }
.archive-item strong { display:block; font-size:18px; color:var(--nav); }
.archive-item span { color:var(--muted); font-size:12px; }
.actions-row { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin:14px 0; }
.mono { font-family: ui-monospace, Consolas, monospace; font-weight:800; }
.small { font-size:12px; color:var(--muted); }
@media (max-width: 720px) {
  .header { padding:14px 14px 0; }
  .main { padding:16px 10px 30px; }
  .brand img { width: 210px; }
  th, td { padding:8px; }
}