/* ===================================================================
   Admin Panel Specific Styles
   =================================================================== */

/* ─── Admin Layout ───────────────────────────────────────────────── */
.admin-wrapper {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
}

/* ─── Sidebar ─────────────────────────────────────────────────────── */
.admin-sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #0d1b6e 0%, #1a237e 50%, #1e2a8a 100%);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 900;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.admin-sidebar::-webkit-scrollbar {
  width: 4px;
}

.admin-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.admin-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
}

.sidebar-logo {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 38px;
  height: 38px;
  background: rgba(255, 214, 0, 0.15);
  border: 1px solid rgba(255, 214, 0, 0.3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-logo-text {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.sidebar-logo-text span {
  color: var(--accent);
}

.sidebar-logo-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* Sidebar Nav */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.35);
  padding: 8px 12px 6px;
  margin-top: 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius);
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 2px;
  text-decoration: none;
  position: relative;
}

.sidebar-link:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.sidebar-link.active {
  background: rgba(255, 214, 0, 0.15);
  color: var(--accent);
  border: 1px solid rgba(255, 214, 0, 0.2);
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.sidebar-link-icon {
  font-size: 18px;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-badge {
  margin-left: auto;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  min-width: 22px;
  text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  margin-bottom: 6px;
  background: rgba(255,255,255,0.05);
}

.sidebar-user-avatar {
  width: 34px;
  height: 34px;
  background: rgba(255,214,0,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
}

.sidebar-user-info {
  min-width: 0;
  flex: 1;
}

.sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  text-transform: capitalize;
}

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

/* ─── Admin Topbar ────────────────────────────────────────────────── */
.admin-topbar {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 800;
  box-shadow: var(--shadow-sm);
}

.admin-topbar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
}

.admin-sidebar-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-secondary);
  font-size: 20px;
}

/* ─── Admin Content ───────────────────────────────────────────────── */
.admin-content {
  flex: 1;
  padding: 24px;
  max-width: 100%;
  overflow-x: hidden;
}

/* ─── Stats Cards ─────────────────────────────────────────────────── */
.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-color, var(--primary));
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  background: var(--stat-bg, rgba(26,35,126,0.1));
}

.stat-info {
  flex: 1;
  min-width: 0;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-change {
  font-size: 12px;
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ─── Admin Table Page ────────────────────────────────────────────── */
.admin-table-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
  pointer-events: none;
}

.search-input-wrapper .form-control {
  padding-left: 38px;
}

.filter-select {
  min-width: 150px;
}

/* ─── Student Detail Page ─────────────────────────────────────────── */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
  align-items: start;
}

.detail-sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.detail-avatar {
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: #fff;
  font-weight: 700;
  margin: 0 auto 16px;
}

.detail-info-table {
  width: 100%;
}

.detail-info-table tr td {
  padding: 10px 0;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.detail-info-table tr:last-child td {
  border: none;
}

.detail-info-table td:first-child {
  color: var(--text-muted);
  font-weight: 600;
  width: 40%;
  padding-right: 16px;
}

.action-buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ─── Notification Card (Dashboard) ──────────────────────────────── */
.notification-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.notification-item:last-child {
  border: none;
}

.notification-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warning);
  margin-top: 6px;
  flex-shrink: 0;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 127, 23, 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(245, 127, 23, 0); }
}

.notification-dot.paid { background: var(--success); }
.notification-dot.active { background: var(--success); animation: none; }

.notification-info { flex: 1; min-width: 0; }
.notification-name { font-weight: 600; font-size: 15px; margin-bottom: 2px; }
.notification-meta { font-size: 13px; color: var(--text-muted); }
.notification-actions { display: flex; gap: 8px; flex-shrink: 0; align-items: center; }

/* ─── Admin Login Page ────────────────────────────────────────────── */
.admin-login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #050d40 0%, #0d1b6e 40%, #1a237e 70%, #162166 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.admin-login-page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255,214,0,0.04) 0%, transparent 30%),
              radial-gradient(circle at 70% 80%, rgba(100,130,255,0.04) 0%, transparent 30%);
}

.admin-login-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  box-shadow: 0 32px 80px rgba(0,0,0,0.4);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.admin-login-header {
  padding: 40px 36px 28px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.admin-login-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  box-shadow: 0 8px 28px rgba(255, 214, 0, 0.35);
}

.admin-login-title {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.admin-login-sub {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-login-body {
  padding: 28px 36px 36px;
}

.admin-form-label {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  font-weight: 600;
}

.admin-form-control {
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(255,255,255,0.12);
  color: #fff;
  border-radius: var(--radius);
  padding: 12px 14px;
  width: 100%;
  font-size: 15px;
  font-family: var(--font-sans);
  outline: none;
  transition: var(--transition);
}

.admin-form-control:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.09);
  box-shadow: 0 0 0 3px rgba(255, 214, 0, 0.1);
}

.admin-form-control::placeholder {
  color: rgba(255,255,255,0.25);
}

.admin-login-error {
  background: rgba(198, 40, 40, 0.15);
  border: 1px solid rgba(198, 40, 40, 0.3);
  color: #ff8a80;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 14px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.admin-btn-login {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--primary-dark);
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  box-shadow: 0 4px 16px rgba(255, 214, 0, 0.35);
}

.admin-btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 214, 0, 0.45);
}

/* ─── Admin Profile ────────────────────────────────────────────────── */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
  align-items: start;
}

/* ─── Responsive Sidebar ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .admin-sidebar {
    transform: translateX(-100%);
  }

  .admin-sidebar.open,
  .admin-sidebar.active {
    transform: translateX(0);
  }

  .admin-sidebar-toggle {
    display: flex !important;
  }

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

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

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .profile-grid {
    grid-template-columns: 1fr;
  }

  .action-buttons-grid {
    grid-template-columns: 1fr;
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 899;
  }

  .sidebar-overlay.open,
  .sidebar-overlay.active {
    display: block;
  }
}

@media (max-width: 640px) {
  .admin-stats-grid {
    grid-template-columns: 1fr;
  }

  .admin-content {
    padding: 16px;
  }

  .admin-topbar {
    padding: 0 16px;
  }

  .admin-table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-select {
    min-width: auto;
    width: 100%;
  }
}