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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  transition: background 0.3s ease, color 0.3s ease;
}

body.dark-theme {
  background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Header */
.header {
  background: var(--color-bg);
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  margin-bottom: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.header h1 {
  font-size: 28px;
  color: var(--color-text);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-tabs button {
  padding: 12px 24px;
  border: none;
  background: var(--color-bgSecondary);
  color: var(--color-text);
  cursor: pointer;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.nav-tabs button:hover {
  background: var(--color-hover);
  transform: translateY(-2px);
}

.nav-tabs button.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--color-bgSecondary);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid var(--color-border);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

.stat-card .label {
  color: var(--color-textSecondary);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-card .value {
  font-size: 32px;
  font-weight: bold;
  color: #667eea;
}

/* Tables */
.table-container {
  background: var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  margin-bottom: 30px;
  border: 1px solid var(--color-border);
}

.table-title {
  padding: 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
}

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

thead {
  background: var(--color-bgSecondary);
  border-bottom: 2px solid var(--color-border);
}

th {
  padding: 15px;
  text-align: left;
  font-weight: 600;
  color: var(--color-textSecondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 15px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 14px;
}

tbody tr:hover {
  background: var(--color-hover);
  cursor: pointer;
}

/* Pagination */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 20px;
}

.pagination button {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  background: var(--color-bgSecondary);
  color: var(--color-text);
  cursor: pointer;
  border-radius: 6px;
  font-size: 13px;
  transition: all 0.3s ease;
}

.pagination button:hover {
  background: var(--color-hover);
}

.pagination button.active {
  background: #667eea;
  color: white;
  border-color: #667eea;
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Loading Spinner */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid #f0f0f0;
  border-top-color: #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
  .header {
    flex-direction: column;
    margin-bottom: 20px;
  }

  .header h1 {
    font-size: 20px;
  }

  .nav-tabs {
    width: 100%;
  }

  .nav-tabs button {
    flex: 1;
    padding: 10px 12px;
    font-size: 12px;
  }

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

  th, td {
    padding: 10px;
    font-size: 12px;
  }
}