/* T3-inspired admin skin: dense, dark rail, blue accent, 8px cards. */
:root {
  --bg: #f3f5f9;
  --surface: #fff;
  --surface-2: #fafbfd;
  --border: #e4e9f1;
  --border-strong: #d4dce8;
  --text: #1b2433;
  --muted: #7b8798;
  --accent: #2f6fed;
  --black: #2f6fed;
  --green: #159a62;
  --red: #e04b4f;
  --amber: #e79a1a;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(16, 28, 46, 0.04), 0 4px 14px rgba(16, 28, 46, 0.04);
  --shadow-hover: 0 2px 6px rgba(16, 28, 46, 0.06), 0 10px 28px rgba(16, 28, 46, 0.06);
}
body {
  background: var(--bg);
  font: 13px/1.55 "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
.layout { min-height: 100vh; }
.sidebar {
  width: 216px;
  flex: 0 0 216px;
  background: linear-gradient(180deg, #101c2e, #0a1423);
  border-right: 0;
  padding: 0 8px 14px;
  gap: 10px;
}
.brand { height: 56px; padding: 0 10px; color: #fff; border-bottom: 1px solid rgba(255, 255, 255, 0.07); }
.brand small { color: #7f92ad; }
.brand-mark { background: linear-gradient(135deg, #2f6fed, #19a0d8); border-radius: 7px; }
#nav { gap: 2px; padding-top: 8px; }
#nav a { color: #b9c7db; border-radius: 6px; padding: 9px 10px; font-size: 13px; }
#nav a:hover { background: rgba(255, 255, 255, 0.06); color: #fff; transform: none; }
#nav a.active { background: var(--accent); color: #fff; font-weight: 500; box-shadow: 0 4px 14px rgba(47, 111, 237, 0.3); }
.side-foot { color: #7f92ad; padding: 10px; border-top: 1px solid rgba(255, 255, 255, 0.07); }
.side-foot .link { color: #7f92ad; }
.main { padding: 20px; max-width: 1500px; }
.topbar { margin-bottom: 14px; }
.topbar h1 { font-size: 20px; letter-spacing: -0.01em; font-weight: 700; }
.view { gap: 12px; animation: none; }
.card, .panel { border-radius: 8px; box-shadow: var(--shadow); }
.card { padding: 14px 16px; }
.card:hover { transform: none; box-shadow: var(--shadow); }
.card .value { font-size: 24px; margin-top: 2px; letter-spacing: -0.02em; }
.panel { padding: 14px; }
.panel h2 { font-size: 14px; margin-bottom: 12px; }
.panel h3 { font-size: 13px; }
.btn { padding: 0 12px; height: 32px; border-radius: 6px; font-size: 12px; transform: none !important; }
.btn.primary { background: var(--accent); border-color: var(--accent); box-shadow: none; }
.btn.primary:hover { background: #1f5bd4; border-color: #1f5bd4; box-shadow: none; }
.btn.small { height: 28px; padding: 0 9px; }
input, select, textarea { border-radius: 6px; height: 34px; border-color: var(--border); }
textarea { height: auto; }
table { font-size: 12px; }
th { background: #fafbfd; color: var(--muted); font-weight: 500; }
th, td { padding: 10px 12px; border-bottom: 1px solid #eef2f7; }
tbody tr:hover { background: #fbfcfe; }
.badge { border-radius: 4px; font-size: 11px; }
.code { background: #f7f9fc; border: 1px dashed #cbd5e1; border-radius: 6px; }
.modal-box { border-radius: 10px; }
.modal-box header { padding: 13px 16px; }
.modal-box h2 { font-size: 15px; }
@media (max-width: 980px) {
  .sidebar { width: 64px; flex-basis: 64px; }
  .brand span:not(.brand-mark), #nav a { font-size: 0; }
  .brand { justify-content: center; padding: 0; }
  #nav a { text-align: center; padding: 10px 0; }
  .side-foot { display: none; }
}