:root {
  --sidebar-w: 260px;
  --brand: #0c4a6e;
  --brand-hover: #0369a1;
  --sidebar-bg: #0f172a;
  --sidebar-text: #94a3b8;
  --sidebar-active: #1e293b;
  --body-bg: #f8fafc;
  --card-border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
}

* { box-sizing: border-box; }

body.admin-app {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--body-bg);
  color: var(--text);
  min-height: 100vh;
}

.admin-shell {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  color: #fff;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1040;
}

.admin-brand {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-brand:hover { color: #fff; }

.admin-brand-logo {
  height: 40px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  flex-shrink: 0;
}

.admin-brand-text { font-weight: 700; font-size: 1rem; line-height: 1.2; }
.admin-brand-sub { font-size: 0.7rem; color: var(--sidebar-text); font-weight: 400; }

.admin-nav {
  flex: 1;
  padding: 1rem 0.75rem;
  overflow-y: auto;
}

.admin-nav-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-text);
  padding: 0.5rem 0.75rem 0.35rem;
  font-weight: 600;
}

.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 2px;
  transition: background 0.15s, color 0.15s;
}

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

.admin-nav-link.active {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(2, 132, 199, 0.15));
  color: #fff;
  font-weight: 500;
}

.admin-nav-link i { font-size: 1.05rem; width: 1.25rem; text-align: center; }

.admin-sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: var(--sidebar-text);
}

.admin-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-topbar {
  background: #fff;
  border-bottom: 1px solid var(--card-border);
  padding: 0.85rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-topbar-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}

.admin-topbar-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.admin-content {
  padding: 1.5rem 1.75rem 2rem;
  flex: 1;
}

.admin-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.admin-page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

.admin-page-header .subtitle {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0;
}

.admin-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.admin-card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.admin-card-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
}

.admin-card-body { padding: 1.25rem; }

.admin-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-stat {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  position: relative;
  overflow: hidden;
}

.admin-stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--brand);
  border-radius: 12px 0 0 12px;
}

.admin-stat.danger::before { background: #dc2626; }
.admin-stat.success::before { background: #16a34a; }

.admin-stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.admin-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0.25rem;
}

.admin-table {
  width: 100%;
  margin: 0;
  font-size: 0.875rem;
}

.admin-table thead th {
  background: #f8fafc;
  border-bottom: 1px solid var(--card-border);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.admin-table tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

.admin-table tbody tr:last-child td { border-bottom: none; }
.admin-table tbody tr:hover { background: #fafbfc; }

.badge-action {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.3em 0.65em;
  border-radius: 6px;
}

.badge-login_ok { background: #dcfce7; color: #166534; }
.badge-login_fail { background: #fee2e2; color: #991b1b; }
.badge-download { background: #dbeafe; color: #1e40af; }
.badge-upload { background: #e0e7ff; color: #3730a3; }
.badge-delete { background: #ffedd5; color: #9a3412; }
.badge-denied { background: #fecaca; color: #7f1d1d; }
.badge-default { background: #f1f5f9; color: #475569; }

.presence-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #86efac;
  margin-right: 0.35rem;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
  animation: presence-pulse 1.5s ease-in-out infinite;
}

@keyframes presence-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

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

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

.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--muted);
}

.empty-state i {
  font-size: 2rem;
  opacity: 0.4;
  display: block;
  margin-bottom: 0.75rem;
}

.folder-browser {
  border: 1px solid var(--card-border);
  border-radius: 10px;
  overflow: hidden;
}

.folder-browser-list {
  max-height: 340px;
  overflow-y: auto;
}

.folder-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  border-bottom: 1px solid #f1f5f9;
  background: #fff;
  padding: 0.7rem 1rem;
  text-align: left;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.12s;
}

.folder-item:hover { background: #f8fafc; }
.folder-item:last-child { border-bottom: none; }

.link-box {
  background: #f8fafc;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.75rem;
}

.link-box.invalid { opacity: 0.55; }

.filter-bar {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.35rem;
}

.status-dot.ok { background: #22c55e; }
.status-dot.err { background: #ef4444; }

/* Login page */
.admin-login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #0f172a 0%, #0c4a6e 50%, #0369a1 100%);
  padding: 1.5rem;
}

.admin-login-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.admin-login-logo-bar {
  background: var(--sidebar-bg);
  margin: -2rem -2rem 0;
  padding: 1.35rem 2rem;
  border-radius: 16px 16px 0 0;
  text-align: center;
}

.admin-login-brand {
  height: 42px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
}

.lang-switcher {
  display: inline-flex;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}

.lang-switcher-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.55rem;
  cursor: pointer;
  line-height: 1.2;
}

.lang-switcher-btn:hover {
  color: var(--text);
  background: #f1f5f9;
}

.lang-switcher-btn.active {
  background: var(--brand);
  color: #fff;
}

.lang-switcher--dark {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.lang-switcher--dark .lang-switcher-btn {
  color: rgba(255, 255, 255, 0.7);
}

.lang-switcher--dark .lang-switcher-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.lang-switcher--dark .lang-switcher-btn.active {
  background: rgba(255, 255, 255, 0.95);
  color: var(--sidebar-bg);
}

.admin-topbar-user .lang-switcher {
  margin-right: 0.75rem;
}

@media (max-width: 991px) {
  .admin-sidebar { transform: translateX(-100%); }
  .admin-main { margin-left: 0; }
}