:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-weak: #dbeafe;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --info: #0284c7;
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Source Sans 3", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

[hidden] {
  display: none !important;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  padding: 24px 16px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.page-header {
  text-align: center;
  margin-bottom: 20px;
}

.page-header h1 {
  margin: 0 0 6px;
  font-size: 28px;
  font-weight: 700;
}

.page-header p {
  margin: 0;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.card-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 600;
}

.card-subtitle {
  margin: 0 0 12px;
  color: var(--muted);
}

.section {
  margin-top: 24px;
}

.section-title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn:hover {
  background: #f3f4f6;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 13px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  font-size: 14px;
  background: #fff;
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.muted {
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: #f9fafb;
}

.badge-success {
  color: #166534;
  background: #dcfce7;
  border-color: #bbf7d0;
}

.badge-warning {
  color: #92400e;
  background: #fef3c7;
  border-color: #fde68a;
}

.badge-danger {
  color: #991b1b;
  background: #fee2e2;
  border-color: #fecaca;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

.table th {
  background: #f3f4f6;
  font-weight: 600;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-status .btn {
  padding: 6px 10px;
  font-size: 13px;
}

@media (max-width: 768px) {
  .page {
    padding: 16px 12px;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

}