:root {
    --primary-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #17a2b8;
}

body {
    background-color: #f8f9fa;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card {
    border: none;
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-header {
    border-bottom: 1px solid #eee;
}

.btn {
    border-radius: 6px;
    transition: all 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.form-control, .form-select {
    border-radius: 6px;
    border-color: #ddd;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.badge {
    font-weight: 500;
    padding: 0.4em 0.6em;
}

.alert {
    border-radius: 8px;
    border: none;
}

.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    color: #666;
    border-bottom: 2px solid #eee;
}

.table td {
    vertical-align: middle;
}

.list-group-item {
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.list-group-item.active {
    border-left-color: var(--primary-color);
}

.list-group-item:hover {
    background-color: #f8f9fa;
}

.shadow-sm {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
}

.shadow-lg {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.3rem;
}

.navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    margin: 0 2px;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.dropdown-menu {
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
}

.dropdown-item {
    padding: 0.5rem 1rem;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
}

footer {
    border-top: 1px solid #eee;
    background-color: #fff;
}

@media (max-width: 768px) {
    .navbar-nav {
        padding: 1rem 0;
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
}

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

.card {
    animation: fadeIn 0.3s ease-out;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: 6px 0 0 6px;
}

.btn-group .btn:last-child {
    border-radius: 0 6px 6px 0;
}

.progress {
    height: 8px;
    border-radius: 4px;
    background-color: #eee;
}

.progress-bar {
    border-radius: 4px;
}

.input-group-text {
    background-color: #f8f9fa;
    border-color: #ddd;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

.bi-spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}