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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: #f5f5f5;
}

/* Login Page */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
  background: white;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
}

/* Admin Interface Layout */
#adminInterface {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: #2c3e50;
  color: white;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 20px;
  background-color: #34495e;
  border-bottom: 1px solid #1a252f;
}

.sidebar-header h4 {
  margin: 0;
  font-size: 20px;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 0;
}

.nav-item {
  display: block;
  padding: 12px 20px;
  color: #ecf0f1;
  text-decoration: none;
  transition: background-color 0.2s;
}

.nav-item:hover {
  background-color: #34495e;
  color: white;
}

.nav-item.active {
  background-color: #3498db;
  color: white;
}

.nav-item span {
  margin-right: 10px;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid #1a252f;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 30px;
  background-color: #f5f5f5;
  overflow-x: auto;
}

.content-section {
  display: none;
}

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

/* Stat Cards */
.stat-card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.stat-label {
  font-size: 14px;
  color: #666;
  margin-bottom: 10px;
}

.stat-value {
  font-size: 32px;
  font-weight: bold;
  color: #2c3e50;
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Table */
.table-responsive {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

/* Pagination */
.pagination-container {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

/* Card */
.card {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  border: none;
}

.card-header {
  background-color: #f8f9fa;
  font-weight: bold;
}

/* Badge */
.badge {
  padding: 5px 10px;
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 768px) {
  #adminInterface {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .main-content {
    padding: 15px;
  }

  .stat-card {
    margin-bottom: 15px;
  }

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

  .toolbar > * {
    width: 100%;
    margin-bottom: 10px;
  }
}