:root {
  --admin-bg: #f0f2f5;
  --admin-sidebar-bg: #1a1f36;
  --admin-sidebar-text: #a0aec0;
  --admin-sidebar-active: #fff;
  --admin-sidebar-hover: #2d3555;
  --admin-sidebar-width: 260px;
  --admin-header-height: 64px;
  --admin-primary: #4f6ef7;
  --admin-primary-hover: #3b5de7;
  --admin-danger: #e53e3e;
  --admin-success: #38a169;
  --admin-warning: #d69e2e;
  --admin-card-bg: #fff;
  --admin-border: #e2e8f0;
  --admin-text: #1a202c;
  --admin-text-secondary: #718096;
  --admin-radius: 8px;
  --admin-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
  --admin-bg: #111827;
  --admin-sidebar-bg: #0f1323;
  --admin-sidebar-hover: #1e2640;
  --admin-card-bg: #1f2937;
  --admin-border: #374151;
  --admin-text: #f3f4f6;
  --admin-text-secondary: #9ca3af;
  --admin-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

.admin-page {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--admin-bg);
  color: var(--admin-text);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

/* Login page */
.admin-login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1a1f36, #2d3555);
}

.admin-login-card {
  background: var(--admin-card-bg);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.admin-login-card h1 {
  text-align: center;
  font-size: 24px;
  margin: 0 0 8px;
  color: var(--admin-text);
}

.admin-login-card .subtitle {
  text-align: center;
  color: var(--admin-text-secondary);
  margin: 0 0 32px;
  font-size: 14px;
}

/* Forms */
.admin-form-group {
  margin-bottom: 20px;
}

.admin-form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--admin-text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.admin-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius);
  font-size: 15px;
  color: var(--admin-text);
  background: var(--admin-card-bg);
  transition: border-color 0.2s;
  outline: none;
}

.admin-input:focus {
  border-color: var(--admin-primary);
  box-shadow: 0 0 0 3px rgba(79,110,247,0.15);
}

.admin-input.code-input {
  text-align: center;
  font-size: 28px;
  letter-spacing: 12px;
  font-weight: 700;
}

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--admin-radius);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.admin-btn-primary {
  background: var(--admin-primary);
  color: #fff;
  width: 100%;
}

.admin-btn-primary:hover { background: var(--admin-primary-hover); }
.admin-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.admin-btn-secondary {
  background: transparent;
  color: var(--admin-primary);
  border: 1px solid var(--admin-border);
}

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

.admin-btn-sm { padding: 8px 16px; font-size: 13px; }

.admin-error {
  background: #fff5f5;
  color: var(--admin-danger);
  padding: 12px 16px;
  border-radius: var(--admin-radius);
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid #fed7d7;
}

.admin-success {
  background: #f0fff4;
  color: var(--admin-success);
  padding: 12px 16px;
  border-radius: var(--admin-radius);
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid #c6f6d5;
}

/* Layout */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--admin-sidebar-width);
  background: var(--admin-sidebar-bg);
  color: var(--admin-sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.admin-sidebar-logo {
  padding: 20px 24px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-sidebar-nav {
  flex: 1;
  padding: 12px;
}

.admin-sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--admin-sidebar-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
  position: relative;
}

.admin-sidebar-link:hover {
  background: var(--admin-sidebar-hover);
  color: var(--admin-sidebar-active);
}

.admin-sidebar-link.active {
  background: var(--admin-primary);
  color: #fff;
}

.admin-sidebar-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.admin-sidebar-badge {
  background: var(--admin-danger);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  margin-left: auto;
}

.admin-sidebar-footer {
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* Main content */
.admin-main {
  flex: 1;
  margin-left: var(--admin-sidebar-width);
  min-height: 100vh;
}

.admin-header {
  height: var(--admin-header-height);
  background: var(--admin-card-bg);
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.admin-header h1 {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.admin-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-content {
  padding: 24px 32px;
}

/* Cards */
.admin-card {
  background: var(--admin-card-bg);
  border-radius: var(--admin-radius);
  box-shadow: var(--admin-shadow);
  border: 1px solid var(--admin-border);
}

.admin-card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-card-header h2 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.admin-card-body {
  padding: 20px;
}

/* Stats grid */
.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.admin-stat-card {
  background: var(--admin-card-bg);
  border-radius: var(--admin-radius);
  padding: 20px;
  box-shadow: var(--admin-shadow);
  border: 1px solid var(--admin-border);
}

.admin-stat-label {
  font-size: 13px;
  color: var(--admin-text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.admin-stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.admin-stat-change {
  font-size: 13px;
  font-weight: 600;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.admin-stat-change.up { color: var(--admin-success); }
.admin-stat-change.down { color: var(--admin-danger); }

/* Charts grid */
.admin-charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.admin-charts-grid .full-width {
  grid-column: 1 / -1;
}

/* Table */
.admin-table-wrapper {
  overflow-x: auto;
}

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

.admin-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--admin-text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--admin-border);
  white-space: nowrap;
}

.admin-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--admin-border);
  vertical-align: middle;
}

.admin-table tr:hover td {
  background: rgba(79,110,247,0.03);
}

/* Badge */
.admin-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.admin-badge-published { background: #c6f6d5; color: #22543d; }
.admin-badge-draft { background: #feebc8; color: #7b341e; }
.admin-badge-archived { background: #e2e8f0; color: #4a5568; }
.admin-badge-unread { background: #bee3f8; color: #2a4365; }
.admin-badge-read { background: #e2e8f0; color: #4a5568; }

/* Filters bar */
.admin-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.admin-select {
  padding: 8px 12px;
  border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius);
  font-size: 14px;
  background: var(--admin-card-bg);
  color: var(--admin-text);
  outline: none;
}

.admin-select:focus {
  border-color: var(--admin-primary);
}

/* Pagination */
.admin-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 16px;
}

.admin-pagination button {
  padding: 6px 12px;
  border: 1px solid var(--admin-border);
  background: var(--admin-card-bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--admin-text);
}

.admin-pagination button.active {
  background: var(--admin-primary);
  color: #fff;
  border-color: var(--admin-primary);
}

/* Date range */
.admin-date-range {
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-date-range input[type="date"] {
  padding: 8px 12px;
  border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius);
  font-size: 14px;
  background: var(--admin-card-bg);
  color: var(--admin-text);
}

.admin-preset-btns {
  display: flex;
  gap: 4px;
}

.admin-preset-btn {
  padding: 6px 12px;
  border: 1px solid var(--admin-border);
  background: var(--admin-card-bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--admin-text-secondary);
  transition: all 0.15s;
}

.admin-preset-btn:hover, .admin-preset-btn.active {
  background: var(--admin-primary);
  color: #fff;
  border-color: var(--admin-primary);
}

/* Toast */
.admin-toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-toast {
  padding: 12px 20px;
  border-radius: var(--admin-radius);
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  animation: slideIn 0.3s ease;
  max-width: 400px;
}

.admin-toast-success { background: var(--admin-success); color: #fff; }
.admin-toast-error { background: var(--admin-danger); color: #fff; }
.admin-toast-info { background: var(--admin-primary); color: #fff; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Theme toggle */
.admin-theme-toggle {
  background: none;
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  color: var(--admin-text-secondary);
  display: flex;
  align-items: center;
}

/* Modal */
.admin-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.admin-modal {
  background: var(--admin-card-bg);
  border-radius: 12px;
  max-width: 500px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.admin-modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-modal-header h3 {
  margin: 0;
  font-size: 18px;
}

.admin-modal-body { padding: 24px; }
.admin-modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--admin-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Responsive */
@media (max-width: 1024px) {
  .admin-charts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }
  .admin-sidebar.open { transform: translateX(0); }
  .admin-main { margin-left: 0; }
  .admin-content { padding: 16px; }
  .admin-header { padding: 0 16px; }
  .admin-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Editor */
.admin-editor {
  border: 1px solid var(--admin-border);
  border-radius: var(--admin-radius);
  min-height: 400px;
}

.admin-editor .ProseMirror {
  padding: 16px;
  min-height: 350px;
  outline: none;
}

.admin-editor .ProseMirror p { margin: 0 0 12px; }
.admin-editor .ProseMirror h2 { font-size: 22px; margin: 24px 0 12px; }
.admin-editor .ProseMirror h3 { font-size: 18px; margin: 20px 0 10px; }
.admin-editor .ProseMirror img { max-width: 100%; border-radius: 4px; }
.admin-editor .ProseMirror ul, .admin-editor .ProseMirror ol { padding-left: 24px; }

.admin-editor-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--admin-border);
  flex-wrap: wrap;
}

.admin-editor-toolbar button {
  padding: 6px 10px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  color: var(--admin-text-secondary);
}

.admin-editor-toolbar button:hover { background: rgba(0,0,0,0.05); }
.admin-editor-toolbar button.is-active {
  background: var(--admin-primary);
  color: #fff;
}

/* Tabs */
.admin-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--admin-border);
  margin-bottom: 20px;
}

.admin-tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--admin-text-secondary);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}

.admin-tab:hover { color: var(--admin-text); }
.admin-tab.active {
  color: var(--admin-primary);
  border-bottom-color: var(--admin-primary);
}

/* Spinner */
.admin-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--admin-border);
  border-top-color: var(--admin-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.admin-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--admin-text-secondary);
}

.admin-empty svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.5; }
.admin-empty p { font-size: 15px; margin: 0; }

/* ========== Site switcher ========== */
.admin-site-switcher {
  position: relative;
  margin: 0 12px 14px;
}
.admin-site-switcher-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  color: var(--admin-sidebar-text, #e5e7eb);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 13px;
  transition: background 0.15s;
}
.admin-site-switcher-btn:hover { background: rgba(255, 255, 255, 0.1); }
.admin-site-switcher-name { font-weight: 600; font-size: 13px; line-height: 1.3; }
.admin-site-switcher-url {
  font-size: 11px;
  opacity: 0.6;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 170px;
}
.admin-site-switcher-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--admin-card-bg, #fff);
  border: 1px solid var(--admin-border, #e5e7eb);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  list-style: none;
  margin: 0;
  padding: 4px;
  max-height: 300px;
  overflow-y: auto;
  z-index: 50;
}
.admin-site-switcher-list li {
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--admin-text, #111827);
  font-size: 13px;
}
.admin-site-switcher-list li:hover { background: var(--admin-hover-bg, #f3f4f6); }
.admin-site-switcher-list li.active { background: var(--admin-primary-soft, #eef2ff); }
.admin-site-switcher-list li span { font-size: 11px; opacity: 0.6; }
.admin-site-switcher-list li.add-site { border-top: 1px solid var(--admin-border, #e5e7eb); margin-top: 4px; padding-top: 8px; }
.admin-site-switcher-list li.add-site a {
  color: var(--admin-primary, #4f6ef7);
  text-decoration: none;
  font-weight: 500;
  font-size: 13px;
}

/* ========== Login page ========== */
.admin-login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--admin-bg, #f3f4f6); }
.admin-login-wrap { width: 100%; max-width: 400px; padding: 24px; }
.admin-login-card {
  background: var(--admin-card-bg, #fff);
  padding: 40px 32px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--admin-border, #e5e7eb);
}
.admin-login-card h1 { margin: 0 0 4px; font-size: 22px; }
.admin-login-card .subtitle { margin: 0 0 24px; color: var(--admin-text-muted, #6b7280); font-size: 14px; }
.admin-login-card .admin-btn { width: 100%; }