/* ==========================================================================
   IJE Admin Portal — Premium dashboard styles
   ========================================================================== */

:root {
  --color-primary: #2196F3;
  --color-primary-dark: #1976D2;
  --color-primary-light: #64B5F6;
  --color-primary-subtle: #E3F2FD;
  --color-white: #FFFFFF;
  --color-bg: #F4F6F9;
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #1A1A2E;
  --color-text-muted: #64748B;
  --color-text-light: #94A3B8;
  --color-success: #22C55E;
  --color-success-bg: #DCFCE7;
  --color-warning: #F59E0B;
  --color-warning-bg: #FEF3C7;
  --color-danger: #EF4444;
  --color-danger-bg: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-bg: #DBEAFE;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --topbar-height: 64px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.08);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 250ms var(--ease-out);
}

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

body {
  font-family: var(--font-family);
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }

button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 9999px;
  padding: 0.625rem 1.25rem;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform 150ms var(--ease-out);
  white-space: nowrap;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}
.btn--primary:hover:not(:disabled) { background: var(--color-primary-dark); }

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.btn--outline:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--danger { background: var(--color-danger); color: var(--color-white); }
.btn--sm { padding: 0.375rem 0.875rem; font-size: 0.8125rem; }
.btn--block { width: 100%; }

.btn__spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* Login page */
.admin-login-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 70% 50% at 80% 10%, var(--color-primary-subtle) 0%, transparent 55%),
    linear-gradient(180deg, #fff 0%, var(--color-bg) 100%);
  padding: 1.5rem;
}

.admin-login {
  width: 100%;
  max-width: 420px;
}

.admin-login__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 2rem;
}

.admin-login__brand small {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-login__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.admin-login__header { margin-bottom: 1.5rem; }
.admin-login__header h1 { font-size: 1.5rem; font-weight: 800; margin-bottom: 0.25rem; }
.admin-login__header p { color: var(--color-text-muted); font-size: 0.9375rem; }

.admin-login__footer {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.admin-login__footer a { display: inline-block; margin-top: 0.5rem; }

/* Forms */
.admin-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: 0.375rem; }
.form-group label { font-size: 0.8125rem; font-weight: 600; color: var(--color-text); }

.form-group input,
.form-group select,
.form-group textarea,
.filter-bar input,
.filter-bar select,
.topbar__search input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.filter-bar input:focus,
.filter-bar select:focus,
.topbar__search input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-subtle);
  outline: none;
}

.input-password { position: relative; }
.input-password input { padding-right: 2.75rem; }

.input-password__toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  padding: 0.25rem;
}

.form-row { display: flex; align-items: center; gap: 1rem; }
.form-row--between { justify-content: space-between; }

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  cursor: pointer;
}

.checkbox input { width: 1rem; height: 1rem; accent-color: var(--color-primary); }

/* Alerts */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.alert--error { background: var(--color-danger-bg); color: #B91C1C; border: 1px solid #FECACA; }
.alert--offline { background: var(--color-warning-bg); color: #B45309; border: 1px solid #FDE68A; }

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

.admin-app[hidden] {
  display: none !important;
}

.admin-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-text);
  color: rgba(255,255,255,0.85);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: width var(--transition), transform var(--transition);
  overflow: hidden;
}

.admin-sidebar.is-collapsed { width: var(--sidebar-collapsed); }
.admin-sidebar.is-collapsed .sidebar__label,
.admin-sidebar.is-collapsed .sidebar__brand-text,
.admin-sidebar.is-collapsed .sidebar__section { opacity: 0; width: 0; overflow: hidden; }

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.sidebar__brand-text { font-weight: 800; font-size: 1.125rem; color: #fff; white-space: nowrap; transition: opacity var(--transition); }

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

.sidebar__section {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  padding: 0.75rem 0.75rem 0.375rem;
  white-space: nowrap;
  transition: opacity var(--transition);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 0.125rem;
  width: 100%;
  text-align: left;
}

.sidebar__link svg { flex-shrink: 0; width: 20px; height: 20px; opacity: 0.85; }

.sidebar__link:hover { background: rgba(255,255,255,0.08); color: #fff; }

.sidebar__link.is-active {
  background: var(--color-primary);
  color: #fff;
}

.sidebar__label { white-space: nowrap; transition: opacity var(--transition); }

.sidebar__footer {
  padding: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar__link--logout { color: #FCA5A5; }
.sidebar__link--logout:hover { background: rgba(239,68,68,0.15); color: #FECACA; }

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

.admin-sidebar.is-collapsed ~ .admin-main { margin-left: var(--sidebar-collapsed); }

.admin-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
}

.topbar__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
}

.topbar__toggle:hover { background: var(--color-bg); }

.topbar__search {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.topbar__search svg {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-light);
  pointer-events: none;
}

.topbar__search input { padding-left: 2.5rem; border-radius: 9999px; }

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.topbar__icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  position: relative;
}

.topbar__icon-btn:hover { background: var(--color-bg); color: var(--color-text); }

.topbar__badge {
  position: absolute;
  top: 6px;
  right: 6px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--color-danger);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.topbar__profile {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.375rem 0.75rem 0.375rem 0.375rem;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.topbar__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.topbar__profile-info { display: flex; flex-direction: column; line-height: 1.2; }
.topbar__profile-name { font-size: 0.8125rem; font-weight: 600; }
.topbar__profile-role { font-size: 0.6875rem; color: var(--color-text-muted); }

.admin-content {
  flex: 1;
  padding: 1.5rem;
  overflow-x: hidden;
}

.panel { display: none; animation: fadeIn 0.3s var(--ease-out); }
.panel.is-active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.panel__title { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.panel__subtitle { color: var(--color-text-muted); font-size: 0.9375rem; margin-top: 0.25rem; }

/* Stats cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.stat-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.stat-card__icon--blue { background: var(--color-primary-subtle); color: var(--color-primary); }
.stat-card__icon--green { background: var(--color-success-bg); color: var(--color-success); }
.stat-card__icon--amber { background: var(--color-warning-bg); color: var(--color-warning); }
.stat-card__icon--red { background: var(--color-danger-bg); color: var(--color-danger); }

.stat-card__value {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-card__label { font-size: 0.8125rem; color: var(--color-text-muted); margin-top: 0.25rem; }

.stat-card__delta {
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

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

/* Charts */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.chart-card__title { font-size: 0.9375rem; font-weight: 700; margin-bottom: 1rem; }
.chart-card canvas { max-height: 220px; }

/* Tables */
.table-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-card__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.table-card__title { font-weight: 700; font-size: 0.9375rem; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.filter-bar input,
.filter-bar select { width: auto; min-width: 140px; padding: 0.5rem 0.875rem; font-size: 0.8125rem; }

.table-wrap { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.data-table th,
.data-table td {
  padding: 0.875rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table th {
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table tbody tr:hover { background: rgba(33, 150, 243, 0.04); }

.data-table td:last-child { white-space: normal; }

.table-empty {
  text-align: center;
  padding: 2.5rem !important;
  color: var(--color-text-muted);
}

.table-actions { display: flex; flex-wrap: wrap; gap: 0.375rem; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge--success { background: var(--color-success-bg); color: #15803D; }
.badge--warning { background: var(--color-warning-bg); color: #B45309; }
.badge--danger { background: var(--color-danger-bg); color: #B91C1C; }
.badge--info { background: var(--color-info-bg); color: #1D4ED8; }
.badge--neutral { background: #F1F5F9; color: #475569; }

/* Loading */
.is-loading { position: relative; pointer-events: none; }
.is-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.6);
  border-radius: inherit;
}

.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 9999;
}

.loading-screen[hidden] {
  display: none !important;
}

.loading-screen__error {
  color: var(--color-danger, #DC2626);
  max-width: 28rem;
  text-align: center;
  line-height: 1.5;
}

.loading-screen__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.connection-banner {
  background: var(--color-warning-bg);
  color: #B45309;
  padding: 0.5rem 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 500;
  border-bottom: 1px solid #FDE68A;
}

.connection-banner[hidden] { display: none; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 5000;
  opacity: 0;
  transition: opacity 200ms var(--ease-out);
}

.modal-overlay.is-visible { opacity: 1; }

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.15);
  transform: translateY(12px);
  transition: transform 200ms var(--ease-out);
}

.modal-overlay.is-visible .modal { transform: translateY(0); }

.modal--lg { max-width: 560px; max-height: 85vh; overflow: hidden; display: flex; flex-direction: column; }

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.modal__title { font-size: 1.125rem; font-weight: 700; }
.modal__message { color: var(--color-text-muted); margin-bottom: 1.5rem; font-size: 0.9375rem; }
.modal__body { overflow-y: auto; font-size: 0.875rem; }
.modal__body dl { display: grid; grid-template-columns: 120px 1fr; gap: 0.5rem 1rem; }
.modal__body dt { color: var(--color-text-muted); font-weight: 500; }
.modal__body dd { word-break: break-word; }

.modal__close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

.modal__close:hover { background: var(--color-bg); }

.modal__actions { display: flex; gap: 0.75rem; justify-content: flex-end; }

/* Toast */
.admin-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--color-text);
  color: #fff;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 6000;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: transform 300ms var(--ease-out), opacity 300ms;
  max-width: 90vw;
  text-align: center;
}

.admin-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.admin-toast--error { background: var(--color-danger); }
.admin-toast--success { background: var(--color-success); }

/* Settings placeholder */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.settings-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.settings-card h3 { font-size: 0.9375rem; margin-bottom: 0.5rem; }
.settings-card p { font-size: 0.8125rem; color: var(--color-text-muted); }

/* Sidebar overlay mobile */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 150;
}

.sidebar-backdrop.is-visible { display: block; }

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

@media (max-width: 768px) {
  .admin-sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width) !important;
  }

  .admin-sidebar.is-mobile-open { transform: translateX(0); }
  .admin-sidebar.is-collapsed .sidebar__label,
  .admin-sidebar.is-collapsed .sidebar__brand-text,
  .admin-sidebar.is-collapsed .sidebar__section { opacity: 1; width: auto; }

  .admin-main { margin-left: 0 !important; }

  .topbar__toggle { display: flex; }
  .topbar__search { display: none; }
  .topbar__profile-info { display: none; }

  .admin-content { padding: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .filter-bar input,
  .filter-bar select { width: 100%; min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}