:root {
  --primary: #1a2b4a;
  --primary-light: #2a4068;
  --accent: #3d7ea6;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --border: #d8dee8;
  --text: #1a2b4a;
  --muted: #6b7a90;
  --danger: #c0392b;
  --warning: #d68910;
  --success: #1e8449;
  --gray: #7f8c8d;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(26, 43, 74, 0.08);
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
}

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

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: linear-gradient(180deg, var(--primary) 0%, #0f1a2e 100%);
  color: #fff;
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar .brand {
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0 20px 24px;
  letter-spacing: 0.02em;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 12px;
}
.sidebar .brand span { display: block; font-size: 0.72rem; font-weight: 400; opacity: 0.65; margin-top: 4px; }
.sidebar nav a {
  display: block;
  color: rgba(255,255,255,0.85);
  padding: 10px 20px;
  text-decoration: none;
  font-size: 0.92rem;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
  text-decoration: none;
}
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}
.topbar .user-meta { font-size: 0.88rem; color: var(--muted); }
.topbar .user-meta strong { color: var(--text); }
.content { padding: 24px; }

.page-title { margin: 0 0 4px; font-size: 1.4rem; }
.page-sub { margin: 0 0 20px; color: var(--muted); font-size: 0.9rem; }

.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.kpi .label { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.kpi .value { font-size: 1.5rem; font-weight: 700; margin-top: 6px; }
.kpi.danger .value { color: var(--danger); }
.kpi.warning .value { color: var(--warning); }
.kpi.success .value { color: var(--success); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  align-items: center;
}
.toolbar input, .toolbar select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: #fff;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-size: 0.88rem;
  cursor: pointer;
}
.btn:hover { background: var(--primary-light); }
.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
table.data th, table.data td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
table.data th {
  background: #eef2f7;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
table.data tr:hover td { background: #f8fafc; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.gray { background: #eceff1; color: var(--gray); }
.badge.green { background: #e8f8ef; color: var(--success); }
.badge.orange { background: #fef5e7; color: var(--warning); }
.badge.red { background: #fdecea; color: var(--danger); }

.text-danger { color: var(--danger); font-weight: 700; }
.text-warning { color: var(--warning); font-weight: 600; }
.text-success { color: var(--success); }
.text-muted { color: var(--muted); }

.state-box {
  padding: 48px 20px;
  text-align: center;
  color: var(--muted);
}
.state-box.error { color: var(--danger); }

.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tabs button {
  background: none;
  border: none;
  padding: 10px 18px;
  cursor: pointer;
  font-size: 0.92rem;
  color: var(--muted);
  border-bottom: 2px solid transparent;
}
.tabs button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.bucket-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.bucket-card summary {
  padding: 14px 16px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  list-style: none;
}
.bucket-card summary::-webkit-details-marker { display: none; }
.bucket-card[open] summary { border-bottom: 1px solid var(--border); background: #f8fafc; }

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(15, 26, 46, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: #fff;
  border-radius: 8px;
  width: min(560px, 100%);
  max-height: 90vh;
  overflow: auto;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.modal header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
}
.modal .body { padding: 16px 20px; }
.modal footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 4px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.pagination {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 12px;
  justify-content: flex-end;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(61,126,166,0.25), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(26,43,74,0.35), transparent 45%),
    linear-gradient(135deg, #0f1a2e 0%, #1a2b4a 50%, #243656 100%);
}
.login-card {
  width: min(400px, 92vw);
  background: #fff;
  border-radius: 10px;
  padding: 36px 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-card h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
  color: var(--primary);
}
.login-card .tagline {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.9rem;
}
.login-card .error-msg {
  background: #fdecea;
  color: var(--danger);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 12px;
  display: none;
}
.login-card .error-msg.show { display: block; }
.login-hint {
  margin-top: 16px;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
}