/* PRD#admin-ui-cleanup — Refactored to use theme tokens (theme.css)
 * 4-tier elevation system: --bg-base / --bg-panel / --bg-card / --bg-elevated
 * Dark + light mode via [data-theme] attribute */

* { font-family: 'Inter', sans-serif; box-sizing: border-box; }
body { margin: 0; padding: 0; background: var(--bg-base); color: var(--text-primary); }

/* ── Sidebar ── */
.sidebar {
  position: fixed; top: 0; left: 0; width: 250px; height: 100vh;
  background: var(--bg-panel); border-right: 1px solid var(--border-subtle);
  display: flex; flex-direction: column; overflow-y: auto; z-index: 50;
}
.sidebar-brand {
  padding: 1.25rem 1rem; font-size: 1.125rem; font-weight: 700;
  color: var(--accent); border-bottom: 1px solid var(--border-subtle);
  letter-spacing: -0.01em;
}
.sidebar-nav { flex: 1; padding: 0.75rem 0; }
.sidebar-link {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.5rem 1rem; color: var(--text-muted); text-decoration: none;
  font-size: 0.875rem; transition: var(--transition-fast);
}
.sidebar-link:hover { color: var(--text-primary); background: var(--bg-elevated); }
.sidebar-link.active {
  color: var(--accent); background: var(--accent-bg);
  border-right: 3px solid var(--accent);
}
.sidebar-link .icon { width: 1.125rem; text-align: center; flex-shrink: 0; }
.sidebar-link .nav-icon { color: inherit; }

/* Submenu */
.submenu { display: none; }
.submenu.open { display: block; }
.submenu .sidebar-link { padding-left: 2.75rem; font-size: 0.8125rem; }
.submenu-toggle { cursor: pointer; user-select: none; }
.submenu-toggle .chevron {
  transition: transform var(--transition-base); display: inline-flex;
  align-items: center; margin-left: auto; opacity: 0.5;
}
.submenu-toggle .chevron .nav-icon { width: 0.875rem; height: 0.875rem; }
.submenu-toggle.open .chevron { transform: rotate(90deg); }

/* ── Main content ── */
.main-content { margin-left: 250px; padding: 1.5rem 2rem; min-height: 100vh; }
.page-header { margin-bottom: 1.5rem; }
.page-header h1 {
  font-size: 1.5rem; font-weight: 700; margin: 0;
  color: var(--text-primary); letter-spacing: -0.01em;
}
.page-header p { color: var(--text-muted); margin: 0.25rem 0 0; font-size: 0.875rem; }

/* ── Cards ── */
.card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 1.5rem; border: 1px solid var(--border-subtle);
  transition: border-color var(--transition-fast);
}
.card:hover { border-color: var(--border-default); }
.card-grid { display: grid; gap: 1rem; }
.card-grid-4 { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.card-grid-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.card-grid-2 { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
.stat-value { font-size: 1.75rem; font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; }
.stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.25rem; }

/* ── Badges ── */
.badge {
  display: inline-block; padding: 0.125rem 0.5rem;
  border-radius: 9999px; font-size: 0.75rem; font-weight: 600;
}
.badge-free { background: var(--bg-elevated); color: var(--text-secondary); }
.badge-platform { background: var(--color-info-bg); color: var(--color-info); }
.badge-pro { background: var(--accent-subtle); color: var(--accent); }
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-neutral { background: var(--bg-elevated); color: var(--text-muted); }

/* ── Status dots ── */
.status-dot { display: inline-block; width: 0.5rem; height: 0.5rem; border-radius: 50%; }
.status-online { background: var(--color-success); }
.status-idle { background: var(--color-warning); }
.status-offline { background: var(--text-disabled); }
.status-suspended { background: var(--color-danger); }
.status-pending { background: var(--color-warning); }
.status-rejected { background: var(--text-muted); }

/* ── Tables ── */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th {
  text-align: left; padding: 0.75rem 1rem;
  color: var(--text-muted); font-weight: 600; font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
}
.data-table td {
  padding: 0.75rem 1rem; border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}
.data-table tr:hover td { background: var(--bg-elevated); }

/* Compact variant for tables inside narrow cards (card-grid-2) */
.data-table-compact th, .data-table-compact td { padding: 0.5rem 0.5rem; }
.data-table-compact { font-size: 0.8125rem; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 1rem; border-radius: var(--radius-md);
  font-size: 0.875rem; font-weight: 500; border: none; cursor: pointer;
  transition: var(--transition-fast);
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--color-danger); color: white; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-secondary { background: var(--bg-elevated); color: var(--text-secondary); border: 1px solid var(--border-default); }
.btn-secondary:hover { background: var(--bg-card); color: var(--text-primary); border-color: var(--border-strong); }
.btn-sm { padding: 0.25rem 0.625rem; font-size: 0.8125rem; }

/* ── Filter bar ── */
.filter-bar { display: flex; gap: 0.75rem; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; }
.filter-bar input,
.filter-bar select {
  background: var(--bg-card); border: 1px solid var(--border-default);
  color: var(--text-primary); padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md); font-size: 0.875rem;
  transition: var(--transition-fast);
}
.filter-bar input:focus,
.filter-bar select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-subtle); }

/* ── Tabs ── */
.tabs {
  display: flex; gap: 0.25rem; border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
}
.tab {
  padding: 0.625rem 1rem; cursor: pointer; color: var(--text-muted);
  font-size: 0.875rem; font-weight: 500;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: var(--transition-fast);
}
.tab:hover { color: var(--text-secondary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Expandable sections ── */
.expand-header { cursor: pointer; display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.25rem; }
.expand-header:hover { background: var(--bg-elevated); border-radius: var(--radius-md); }
.expand-body { padding: 0 1.25rem 1rem; display: none; }
.expand-body.open { display: block; }

/* ── Markdown content ── */
.md-content { line-height: 1.7; color: var(--text-secondary); }
.md-content h1 { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin: 1.5rem 0 0.75rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.5rem; }
.md-content h2 { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); margin: 1.25rem 0 0.5rem; }
.md-content h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin: 1rem 0 0.5rem; }
.md-content p { margin: 0.5rem 0; }
.md-content code { background: var(--bg-elevated); padding: 0.15rem 0.4rem; border-radius: var(--radius-sm); font-size: 0.85em; color: var(--accent); font-family: 'SF Mono', Menlo, Consolas, monospace; }
.md-content pre { background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 1rem; overflow-x: auto; margin: 0.75rem 0; }
.md-content pre code { background: none; padding: 0; color: var(--text-secondary); }
.md-content table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; font-size: 0.85rem; }
.md-content th { text-align: left; padding: 0.5rem 0.75rem; background: var(--bg-elevated); border: 1px solid var(--border-subtle); color: var(--text-muted); font-weight: 600; }
.md-content td { padding: 0.5rem 0.75rem; border: 1px solid var(--border-subtle); }
.md-content ul, .md-content ol { padding-left: 1.5rem; margin: 0.5rem 0; }
.md-content li { margin: 0.25rem 0; }
.md-content blockquote { border-left: 3px solid var(--accent); padding-left: 1rem; color: var(--text-muted); margin: 0.75rem 0; }
.md-content a { color: var(--accent); text-decoration: none; }
.md-content a:hover { text-decoration: underline; }
.md-content hr { border: none; border-top: 1px solid var(--border-subtle); margin: 1.5rem 0; }

/* ── Modals ── */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 1rem;
}
.modal {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border-default); box-shadow: var(--shadow-lg);
  max-width: 600px; width: 100%; max-height: 90vh; overflow-y: auto;
}
.modal-header {
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-subtle);
  display: flex; justify-content: space-between; align-items: center;
}
.modal-header h2 { margin: 0; font-size: 1.125rem; color: var(--text-primary); }
.modal-body { padding: 1.5rem; }
.modal-footer {
  padding: 1rem 1.5rem; border-top: 1px solid var(--border-subtle);
  display: flex; gap: 0.5rem; justify-content: flex-end;
}

/* ── Mobile hamburger ── */
.hamburger {
  display: none; position: fixed; top: 1rem; left: 1rem; z-index: 60;
  background: var(--bg-card); border: 1px solid var(--border-default);
  border-radius: var(--radius-md); padding: 0.5rem 0.75rem;
  color: var(--text-primary); font-size: 1.25rem; cursor: pointer;
}

/* ── Mobile responsive ── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform var(--transition-base); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 1rem; padding-top: 3.5rem; }
  .hamburger { display: block; }
  .card { padding: 1rem; }
  .card-grid-4, .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .data-table { display: block; overflow-x: auto; }
  .md-content table { display: block; overflow-x: auto; }
}

/* ── Utility classes ── */
.text-green { color: var(--color-success); }
.text-yellow { color: var(--color-warning); }
.text-red { color: var(--color-danger); }
.text-blue { color: var(--color-info); }
.text-purple { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.flex { display: flex; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }