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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7fa;
    color: #333;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logout-btn {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    background: rgba(0,0,0,0.2);
    border-radius: 5px;
    transition: background 0.3s;
}

.logout-btn:hover {
    background: rgba(0,0,0,0.4);
}

.container {
    display: flex;
    min-height: calc(100vh - 70px);
}

.sidebar {
    width: 250px;
    background: #fff;
    padding: 2rem;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar h3 {
    margin-bottom: 1rem;
    color: #333;
}

.sidebar ul {
    list-style: none;
}

.sidebar ul li {
    margin-bottom: 0.5rem;
}

.sidebar ul li a {
    text-decoration: none;
    color: #333;
    padding: 0.5rem;
    display: block;
    border-radius: 5px;
    transition: background 0.3s;
}

.sidebar ul li a.active, .sidebar ul li a:hover {
    background: #667eea;
    color: white;
}

.main-content {
    flex: 1;
    padding: 2rem;
}

.welcome-message {
    margin-bottom: 2rem;
}

.welcome-message h2 {
    color: #333;
    margin-bottom: 0.5rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

.stat-label {
    color: #666;
}

.recent-activity {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.activity-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.table-container {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.table th, .table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background: #f8f9fa;
    cursor: pointer;
}

.table th a {
    text-decoration: none;
    color: #333;
}

.table th a:hover {
    color: #667eea;
}

.table td.actions {
    display: flex;
    gap: 0.5rem;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: transform 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-danger {
    background: #e74c3c;
}

.btn-success {
    background: #2ecc71;
}

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 5px;
}

.alert-success {
    background: #dff0d8;
    color: #3c763d;
}

.alert-danger {
    background: #f2dede;
    color: #a94442;
}

.pagination {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    justify-content: center;
}

.pagination a, .pagination span {
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: #333;
    border-radius: 5px;
}

.pagination a:hover {
    background: #667eea;
    color: white;
}

.pagination .current {
    background: #667eea;
    color: white;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal-content {
    background: white;
    margin: 10% auto;
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.close {
    cursor: pointer;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}