:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e5e9f0;
  --brand: #2563eb;
  --ok: #047857;
  --warn: #b45309;
  --danger: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 14px;
  line-height: 1.55;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: flex; min-height: 100vh; }

/* ---------------- 侧栏 ---------------- */
.sidebar {
  width: 232px;
  flex: 0 0 232px;
  background: #0b1220;
  color: #cbd5e1;
  padding: 22px 14px 18px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 0 8px 20px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px;
  background: linear-gradient(135deg, #3b82f6, #22d3ee);
  display: grid; place-items: center;
  font-weight: 800; font-size: 12px; letter-spacing: .5px; color: #04121f;
}
.brand strong { display: block; font-size: 14.5px; color: #f8fafc; }
.brand small { display: block; font-size: 11.5px; color: #94a3b8; }

.sidebar nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar nav a {
  color: #c3cddb; padding: 10px 12px; border-radius: 9px;
  font-size: 13.5px; text-decoration: none;
}
.sidebar nav a:hover { background: #16213a; color: #fff; }
.sidebar nav a.active { background: var(--brand); color: #fff; font-weight: 600; }

.sidebar-foot { margin-top: auto; padding: 16px 12px 0; border-top: 1px solid #1b2438; }
.sidebar-foot a { color: #93a1b5; font-size: 13px; }

/* ---------------- 主体 ---------------- */
.main { flex: 1; min-width: 0; padding: 26px 30px 72px; max-width: 1500px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-bottom: 20px;
}
.topbar h1 { margin: 0; font-size: 21px; letter-spacing: -.2px; }
.topbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .04);
}
.card h2 { margin: 0 0 12px; font-size: 15px; }
.card h2 .sub { color: var(--muted); font-weight: 400; font-size: 12.5px; margin-left: 6px; }

.grid { display: grid; gap: 16px; }
.grid.stats { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-bottom: 16px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); margin-bottom: 16px; }

.stat span { color: var(--muted); font-size: 12.5px; }
.stat strong { display: block; font-size: 26px; margin: 4px 0 2px; letter-spacing: -.5px; }
.stat small { color: var(--muted); font-size: 12px; }

/* ---------------- 表格 ---------------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; white-space: nowrap; }
tbody tr:hover { background: #f8fafc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }

/* ---------------- 徽标 ---------------- */
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; line-height: 20px; white-space: nowrap;
}
.badge-ok { background: #ecfdf5; color: var(--ok); }
.badge-warn { background: #fffbeb; color: var(--warn); }
.badge-danger { background: #fef2f2; color: var(--danger); }
.badge-muted { background: #f1f5f9; color: #475569; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 8px 14px; border-radius: 9px; font-size: 13.5px;
  cursor: pointer; text-decoration: none; font-family: inherit;
}
.btn:hover { background: #f8fafc; text-decoration: none; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { border-color: #fecaca; color: var(--danger); }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---------------- 表单 ---------------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.field input, .field select, .field textarea {
  border: 1px solid var(--line); border-radius: 9px; padding: 9px 12px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--ink); width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
.field .hint { font-size: 12px; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.inline-form .field { margin-bottom: 0; min-width: 140px; flex: 1; }

/* ---------------- 提示 ---------------- */
.alert {
  border-radius: 11px; padding: 11px 14px; margin-bottom: 16px;
  font-size: 13.5px; border: 1px solid transparent;
}
.alert-ok { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.alert-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* ---------------- 详情 ---------------- */
.meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px 22px; }
.meta div span { display: block; color: var(--muted); font-size: 12px; }
.meta div strong { font-size: 14px; font-weight: 600; }
.section { margin-top: 16px; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.section-head h2 { margin: 0; }

.empty { color: var(--muted); padding: 18px 4px; font-size: 13.5px; }

/* ---------------- 登录 ---------------- */
.login-wrap {
  min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(1200px 600px at 20% 0%, #dbeafe 0%, var(--bg) 55%);
}
.login-card {
  width: 100%; max-width: 380px; background: #fff; border: 1px solid var(--line);
  border-radius: 16px; padding: 30px 28px; box-shadow: 0 18px 40px rgba(15, 23, 42, .08);
}
.login-card h1 { margin: 14px 0 4px; font-size: 20px; }
.login-card p.sub { margin: 0 0 22px; color: var(--muted); font-size: 13px; }
.login-card .btn-primary { width: 100%; justify-content: center; padding: 11px; }
.login-foot { text-align: center; color: var(--muted); font-size: 12px; margin-top: 18px; }

@media (max-width: 880px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; flex: none; height: auto; position: static; flex-direction: row; align-items: center; gap: 12px; padding: 12px 14px; }
  .brand { padding: 0; }
  .brand small { display: none; }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; margin: 0; }
  .sidebar nav a { padding: 7px 10px; }
  .sidebar-foot { margin: 0 0 0 auto; padding: 0; border: 0; }
  .main { padding: 18px 16px 60px; }
  .topbar h1 { font-size: 19px; }
}