:root {
  --canvas: #f5f7fa;
  --card: #ffffff;
  --ink: #1e293b;
  --ink2: #334155;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-deep: #1d4ed8;
  --line: #e2e8f0;
  --side: #0f172a;
  --side-text: #cbd5e1;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --amber: #d97706;
  --amber-bg: #fef3c7;
  --red: #dc2626;
  --red-bg: #fee2e2;
  --blue-bg: #dbeafe;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  display: flex;
  min-height: 100vh;
  font-family: Inter, "Noto Sans SC", system-ui, "Microsoft YaHei", sans-serif;
  background: var(--canvas);
  color: var(--ink);
}
.sidebar {
  width: 220px;
  background: var(--side);
  color: var(--side-text);
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.brand {
  color: #fff;
  font-weight: 700;
  padding: 8px 12px 20px;
  font-size: 15px;
}
.nav-item {
  text-align: left;
  background: transparent;
  border: none;
  color: var(--side-text);
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.nav-item:hover { background: #1e293b; }
.nav-item.active {
  background: #1e293b;
  color: #fff;
  border-left-color: var(--primary);
}
.side-foot { margin-top: auto; padding: 12px; font-size: 12px; }
.main { flex: 1; padding: 24px 28px; overflow: auto; }
.top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.top h1 { margin: 0; font-size: 22px; font-family: "Noto Serif SC", Georgia, serif; }
.actor { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  box-shadow: 0 1px 2px rgba(15,23,42,.04);
  margin-bottom: 12px;
}
.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.table th { color: var(--muted); font-weight: 600; font-size: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-deep); }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink2); }
.btn-danger { background: var(--red); color: #fff; }
.btn + .btn { margin-left: 8px; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
}
.tag-pending { background: var(--amber-bg); color: var(--amber); }
.tag-approved { background: var(--green-bg); color: var(--green); }
.tag-rejected { background: var(--red-bg); color: var(--red); }
.tag-draft { background: var(--blue-bg); color: var(--primary); }
.muted { color: var(--muted); }
.row-actions { white-space: nowrap; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.kv { font-size: 14px; }
.kv span { color: var(--muted); }
.total { font-size: 24px; color: var(--primary); font-weight: 700; }
.form-row { margin: 12px 0; }
.form-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.form-row input, .form-row textarea {
  width: 100%;
  max-width: 360px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--primary); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat-card { text-align: center; padding: 20px; }
.stat-card .n { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .l { color: var(--muted); font-size: 13px; margin-top: 4px; }
.audit-list { font-size: 13px; color: var(--ink2); }
.audit-list li { margin-bottom: 6px; }
.link { color: var(--primary); word-break: break-all; }

/* v1.1 */
.btn { min-height: 40px; padding: 0 18px; font-size: 14px; cursor: pointer; }
.btn:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid #2563eb; outline-offset: 1px; }
.actions-bar { display: flex; gap: 12px; margin: 12px 0; flex-wrap: wrap; }
.nav-group { color: #64748b; font-size: 12px; padding: 14px 16px 4px; letter-spacing: .05em; }
.top-right { display: flex; gap: 12px; align-items: center; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form input, .inline-form select, .table select, .login-box input { padding: 9px 10px; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 14px; min-height: 40px; box-sizing: border-box; }
.sec { margin: 0 0 12px; font-size: 15px; }
details.tip { margin-top: 12px; color: #64748b; font-size: 13px; }
details.tip summary { cursor: pointer; color: #2563eb; }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.login-wrap { display: none; }
body.logged-out .sidebar, body.logged-out .main { display: none; }
body.logged-out .login-wrap { display: flex; position: fixed; inset: 0; background: #f5f7fa; align-items: center; justify-content: center; }
.login-box { width: 360px; display: flex; flex-direction: column; gap: 10px; }
.login-box h2 { margin: 0; font-size: 18px; }
.btn-block { width: 100%; }
.err { color: #dc2626; font-size: 13px; }
.hidden { display: none !important; }