:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --primary: #8b5cf6;
  --primary-light: rgba(139, 92, 246, 0.15);
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-family: 'Inter', sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Loader --- */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* --- Auth Wrapper --- */
.auth-container {
  display: flex;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at top right, rgba(139, 92, 246, 0.1), transparent),
              radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.05), transparent);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background-color: var(--primary);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #fff 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
  background-color: rgba(255, 255, 255, 0.05);
}

.auth-btn {
  width: 100%;
  padding: 14px;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.auth-btn:hover {
  background-color: #7c3aed;
  transform: translateY(-1px);
}

.auth-btn:active {
  transform: translateY(0);
}

/* --- Layout --- */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
}

.sidebar-header {
  margin-bottom: 40px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-item i {
  font-size: 18px;
}

.nav-item:hover, .nav-item.active {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
  color: #fff;
  background-color: var(--primary-light);
  border-left: 3px solid var(--primary);
  border-top-left-radius: 2px;
  border-bottom-left-radius: 2px;
}

.sidebar-footer {
  margin-top: auto;
}

/* --- Main Panel --- */
.main-panel {
  flex: 1;
  margin-left: 260px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.search-container {
  flex: 1;
  max-width: 400px;
  margin: 0 24px;
}

.search-box {
  position: relative;
  width: 100%;
}

.search-box i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 14px;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all 0.2s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.panel-title h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 6px;
}

.panel-title p {
  color: var(--text-secondary);
  font-size: 14px;
}

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

.avatar-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary);
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 700;
  color: #fff;
}

.admin-info span {
  display: block;
}

.admin-name {
  font-weight: 600;
  font-size: 14px;
}

.admin-role {
  font-size: 12px;
  color: var(--text-secondary);
}

/* --- Cards / Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}

.stat-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
}

.stat-icon.primary { background-color: var(--primary-light); color: var(--primary); }
.stat-icon.success { background-color: var(--success-light); color: var(--success); }
.stat-icon.warning { background-color: var(--warning-light); color: var(--warning); }
.stat-icon.danger { background-color: var(--danger-light); color: var(--danger); }

.stat-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
}

/* --- Tables & Lists --- */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.table-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.table-header h2 {
  font-size: 16px;
  font-weight: 700;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th, .data-table td {
  padding: 16px 24px;
  font-size: 14px;
}

.data-table th {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.data-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.01);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.success { background-color: var(--success-light); color: var(--success); }
.badge.warning { background-color: var(--warning-light); color: var(--warning); }
.badge.danger { background-color: var(--danger-light); color: var(--danger); }
.badge.primary { background-color: var(--primary-light); color: var(--primary); }

/* --- Buttons --- */
.btn {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn.primary { background-color: var(--primary); color: #fff; }
.btn.primary:hover { background-color: #7c3aed; }
.btn.success { background-color: var(--success); color: #fff; }
.btn.success:hover { background-color: #059669; }
.btn.danger { background-color: var(--danger); color: #fff; }
.btn.danger:hover { background-color: #dc2626; }
.btn.outline { background-color: transparent; border: 1.5px solid var(--border-color); color: var(--text-primary); }
.btn.outline:hover { background-color: rgba(255,255,255,0.05); }

/* --- Tab Panels --- */
.tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-panel.active {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hidden {
  display: none !important;
}

/* --- Pagination Controls --- */
.pagination-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
}

.pagination-btn {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--primary);
  border-color: var(--primary);
}

.pagination-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination-info {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Modal --- */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 500px;
  padding: 30px;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.3s ease;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.modal-close:hover {
  color: var(--danger);
}