/* ==============================================================================
   141 HQ — Admin Console Design System (Strict Flat Minimalism)
   ============================================================================== */

:root {
  --admin-bg: #09090b;
  --admin-card: #121215;
  --admin-card-hover: #18181b;
  --admin-border: #27272a;
  --admin-border-focus: #3f3f46;
  --admin-text-main: #f4f4f5;
  --admin-text-muted: #a1a1aa;
  --admin-text-dim: #71717a;
  --admin-accent: #14b8a6;
  --admin-accent-hover: #0d9488;
  --admin-accent-muted: rgba(20, 184, 166, 0.12);
  --admin-danger: #ef4444;
  --admin-danger-muted: rgba(239, 68, 68, 0.12);
  --admin-warning: #f59e0b;
  --admin-warning-muted: rgba(245, 158, 11, 0.12);
  --admin-success: #22c55e;
  --admin-success-muted: rgba(34, 197, 94, 0.12);
}

/* Base View Layout */
.admin-shell {
  min-height: 100vh;
  background-color: var(--admin-bg);
  color: var(--admin-text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
}

/* Admin Top Sub-Navigation Bar */
.admin-subnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background-color: var(--admin-card);
  border-bottom: 1px solid var(--admin-border);
  padding: 12px 24px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.admin-subnav-left {
  display: flex;
  align-items: center;
  gap: 24px;
  overflow-x: auto;
  white-space: nowrap;
}

.admin-subnav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--admin-text-main);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.admin-subnav-brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: var(--admin-danger-muted);
  color: var(--admin-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.admin-subnav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--admin-text-muted);
  text-decoration: none;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.admin-nav-tab:hover {
  color: var(--admin-text-main);
  background-color: var(--admin-card-hover);
}

.admin-nav-tab.active {
  color: #ffffff;
  background-color: #27272a;
  border-color: #3f3f46;
  font-weight: 600;
}

.admin-subnav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 9px;
  background-color: var(--admin-danger);
  color: #ffffff;
}

/* Page Header */
.admin-header {
  padding: 24px 24px 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.admin-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.admin-title-group h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--admin-text-main);
  letter-spacing: -0.02em;
  margin: 0;
}

.admin-title-group p {
  font-size: 0.875rem;
  color: var(--admin-text-muted);
  margin: 4px 0 0 0;
}

.admin-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Flat Grid Container */
.admin-container {
  padding: 0 24px 32px 24px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}

/* Flat KPI Grid */
.admin-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.admin-kpi-card {
  background-color: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.admin-kpi-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--admin-text-muted);
  font-weight: 600;
}

.admin-kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--admin-text-main);
  letter-spacing: -0.02em;
}

.admin-kpi-sub {
  font-size: 0.8rem;
  color: var(--admin-text-dim);
}

/* Navigation Hub Cards (Dashboard) */
.admin-modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.admin-module-card {
  background-color: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.admin-module-card:hover {
  border-color: var(--admin-border-focus);
  background-color: var(--admin-card-hover);
}

.admin-module-top {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.admin-module-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background-color: #27272a;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
}

.admin-module-info h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--admin-text-main);
  margin: 0 0 6px 0;
}

.admin-module-info p {
  font-size: 0.85rem;
  color: var(--admin-text-muted);
  line-height: 1.45;
  margin: 0;
}

.admin-module-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--admin-border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--admin-accent);
}

/* Control Matrix (Pages Page) */
.admin-control-table-wrap {
  background-color: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 24px;
}

.admin-control-toolbar {
  padding: 16px 20px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-search-input {
  background-color: #18181b;
  border: 1px solid var(--admin-border);
  border-radius: 6px;
  color: #ffffff;
  padding: 8px 14px;
  font-size: 0.85rem;
  width: 280px;
  outline: none;
}

.admin-search-input:focus {
  border-color: var(--admin-accent);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.admin-table th {
  background-color: #18181b;
  color: var(--admin-text-muted);
  font-weight: 600;
  padding: 12px 18px;
  border-bottom: 1px solid var(--admin-border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.admin-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--admin-border);
  color: var(--admin-text-main);
  vertical-align: middle;
}

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

.admin-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Switch & Toggle (Clean Flat) */
.admin-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.admin-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.admin-switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #27272a;
  border-radius: 24px;
  transition: 0.2s;
  border: 1px solid #3f3f46;
}

.admin-switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: #ffffff;
  border-radius: 50%;
  transition: 0.2s;
}

.admin-switch input:checked + .admin-switch-slider {
  background-color: var(--admin-accent);
  border-color: var(--admin-accent);
}

.admin-switch input:checked + .admin-switch-slider:before {
  transform: translateX(20px);
}

/* Badges */
.admin-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}

.admin-badge.status-active {
  background-color: var(--admin-success-muted);
  color: var(--admin-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.admin-badge.status-disabled {
  background-color: var(--admin-danger-muted);
  color: var(--admin-danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.admin-badge.badge-brand {
  background-color: var(--admin-accent-muted);
  color: var(--admin-accent);
  border: 1px solid rgba(20, 184, 166, 0.3);
}

.admin-badge.badge-warning {
  background-color: var(--admin-warning-muted);
  color: var(--admin-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.admin-badge.badge-role-admin {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.admin-badge.badge-role-faculty {
  background-color: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.35);
}

.admin-badge.badge-role-student {
  background-color: rgba(161, 161, 170, 0.15);
  color: #d4d4d8;
  border: 1px solid rgba(161, 161, 170, 0.25);
}

/* Buttons */
.btn-admin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  text-decoration: none;
}

.btn-admin-primary {
  background-color: var(--admin-accent);
  color: #000000;
}

.btn-admin-primary:hover {
  background-color: var(--admin-accent-hover);
}

.btn-admin-secondary {
  background-color: #27272a;
  border-color: #3f3f46;
  color: #ffffff;
}

.btn-admin-secondary:hover {
  background-color: #3f3f46;
}

.btn-admin-danger {
  background-color: var(--admin-danger-muted);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--admin-danger);
}

.btn-admin-danger:hover {
  background-color: rgba(239, 68, 68, 0.25);
}

.btn-admin-sm {
  padding: 4px 10px;
  font-size: 0.75rem;
}

/* Modals */
.admin-modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.admin-modal-backdrop.open {
  display: flex;
}

.admin-modal-card {
  background-color: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
}

.admin-modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.admin-modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
}

.admin-modal-close {
  background: transparent;
  border: none;
  color: var(--admin-text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
}

.admin-modal-close:hover {
  color: #ffffff;
}

.admin-modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.admin-modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.admin-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.admin-form-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--admin-text-muted);
}

.admin-form-input, .admin-form-select {
  background-color: #18181b;
  border: 1px solid var(--admin-border);
  border-radius: 6px;
  color: #ffffff;
  padding: 9px 12px;
  font-size: 0.85rem;
  width: 100%;
  box-sizing: border-box;
  outline: none;
}

.admin-form-input:focus, .admin-form-select:focus {
  border-color: var(--admin-accent);
}

/* Security Denial Screen */
.admin-denied-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
  padding: 24px;
}

.admin-denied-box {
  background-color: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 36px 32px;
  max-width: 480px;
  width: 100%;
}

@media (max-width: 768px) {
  .admin-subnav {
    padding: 10px 16px;
  }
  .admin-container {
    padding: 0 16px 24px 16px;
  }
  .admin-kpi-grid {
    grid-template-columns: 1fr;
  }
  .admin-modules-grid {
    grid-template-columns: 1fr;
  }
}