/* ============================================================
   ADMIN STYLES - Clean Light Theme
   ============================================================ */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

/* ============================================================
   LOGIN PAGE
   ============================================================ */

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-box {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

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

.login-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.login-header p {
  color: var(--gray-500);
  font-size: 14px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-success {
  background: var(--success);
  color: var(--white);
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
}

.error-message {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  padding: 12px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.error-message.show {
  display: block;
}

/* ============================================================
   DASHBOARD LAYOUT
   ============================================================ */

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

.sidebar {
  width: 260px;
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
}

.sidebar-header span {
  font-size: 12px;
  color: var(--gray-500);
}

.sidebar-nav {
  flex: 1;
  padding: 16px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--gray-600);
  border-radius: var(--radius);
  margin-bottom: 4px;
  transition: all 0.2s;
  font-size: 15px;
}

.nav-item:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  text-decoration: none;
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

.nav-item svg {
  width: 20px;
  height: 20px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--gray-200);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--gray-50);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 16px;
}

.user-details {
  flex: 1;
}

.user-details .name {
  font-weight: 500;
  color: var(--gray-900);
  font-size: 14px;
}

.user-details .role {
  font-size: 12px;
  color: var(--gray-500);
}

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 24px;
}

/* ============================================================
   PAGE HEADER
   ============================================================ */

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

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
}

.page-actions {
  display: flex;
  gap: 12px;
}

/* ============================================================
   STATS CARDS
   ============================================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.stat-card .label {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .value {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-900);
}

.stat-card .change {
  font-size: 13px;
  margin-top: 8px;
}

.stat-card .change.positive {
  color: var(--success);
}

.stat-card .change.negative {
  color: var(--danger);
}

/* ============================================================
   DATA TABLE
   ============================================================ */

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
}

.card-body {
  padding: 24px;
}

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

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.data-table td {
  padding: 16px;
  border-bottom: 1px solid var(--gray-100);
  font-size: 14px;
}

.data-table tr:hover {
  background: var(--gray-50);
}

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

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.action-buttons {
  display: flex;
  gap: 8px;
}

.action-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--gray-100);
  color: var(--gray-600);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  background: var(--gray-200);
  color: var(--gray-900);
}

.action-btn.danger:hover {
  background: #fee2e2;
  color: var(--danger);
}

.action-btn svg {
  width: 16px;
  height: 16px;
}

/* ============================================================
   MODAL
   ============================================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(-20px);
  transition: transform 0.3s;
}

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

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--gray-400);
  cursor: pointer;
  border-radius: var(--radius);
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--gray-100);
  color: var(--gray-600);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* ============================================================
   FORM STYLES IN MODAL
   ============================================================ */

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 15px;
  background: var(--white);
  cursor: pointer;
}

.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* ============================================================
   EMPTY STATE
   ============================================================ */

.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--gray-300);
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--gray-500);
  margin-bottom: 20px;
}

/* ============================================================
   LOADING
   ============================================================ */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--white);
  padding: 16px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

/* ============================================================
   MEMBERSHIP STYLES
   ============================================================ */

.membership-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  padding: 20px;
}

.membership-stat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius);
  color: var(--white);
}

.membership-stat-card.tier-free {
  background: linear-gradient(135deg, #6b7280, #4b5563);
}

.membership-stat-card.tier-premium {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.membership-stat-card.tier-pro {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.membership-stat-card.tier-ultra {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.membership-stat-card .tier-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.membership-stat-card .tier-info {
  flex: 1;
}

.membership-stat-card .tier-name {
  font-size: 14px;
  opacity: 0.9;
  margin-bottom: 4px;
}

.membership-stat-card .tier-count {
  font-size: 28px;
  font-weight: 700;
}

/* Tier badges in tables */
.tier-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tier-badge.tier-free {
  background: #e5e7eb;
  color: #374151;
}

.tier-badge.tier-premium {
  background: #dbeafe;
  color: #1d4ed8;
}

.tier-badge.tier-pro {
  background: #ede9fe;
  color: #6d28d9;
}

.tier-badge.tier-ultra {
  background: #fef3c7;
  color: #b45309;
}

/* Token display */
.token-display {
  display: inline-block;
  padding: 4px 10px;
  background: var(--gray-100);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: monospace;
  color: var(--gray-700);
}

.token-display:hover {
  background: var(--gray-200);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

  .sidebar.open {
    transform: translateX(0);
  }

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .data-table {
    font-size: 13px;
  }

  .data-table th,
  .data-table td {
    padding: 12px 8px;
  }
}