:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #d8dee9;
  --text: #1e293b;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-bg: #eff6ff;
  --danger: #dc2626;
  --header: #ffffff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--header);
  border-bottom: 1px solid var(--border);
}

.admin-header h1 { font-size: 18px; font-weight: 600; }

.admin-header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.admin-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: calc(100vh - 52px);
}

.admin-nav {
  padding: 16px 12px;
  border-right: 1px solid var(--border);
  background: var(--panel);
}

.admin-nav button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  margin-bottom: 4px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}

.admin-nav button:hover { background: var(--bg); }
.admin-nav button.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 600;
}

.admin-main {
  padding: 20px;
  overflow: auto;
}

.admin-panel { display: none; }
.admin-panel.active { display: block; }

.admin-panel h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  align-items: center;
}

.admin-toolbar select,
.admin-toolbar input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  background: var(--panel);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}

.stat-card .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-card .value {
  font-size: 22px;
  font-weight: 600;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 13px;
}

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

.data-table th {
  background: var(--bg);
  font-weight: 600;
  font-size: 12px;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.toolbar-btn {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
}

.toolbar-btn:hover { background: var(--bg); }
.toolbar-btn.danger { color: var(--danger); border-color: #fecaca; }
.toolbar-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }

.detail-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}

.detail-card h3 { font-size: 16px; margin-bottom: 12px; }

.detail-card label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.detail-card input,
.detail-card textarea,
.detail-card select {
  width: 100%;
  margin-bottom: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}

.detail-card textarea {
  min-height: 120px;
  font-family: ui-monospace, monospace;
}

.admin-error {
  padding: 12px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  border-radius: 8px;
  margin-bottom: 16px;
}

.admin-muted { color: var(--text-muted); font-size: 13px; }