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

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.card {
    box-shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.24);
    border: none;
    margin-bottom: 1.5rem;
}

.card-header {
    font-weight: 600;
    border-bottom: 2px solid rgba(0,0,0,.05);
}

.table {
    margin-bottom: 0;
}

.list-group-item {
    border-left: none;
    border-right: none;
}

.list-group-item:first-child {
    border-top: none;
}

.list-group-item:last-child {
    border-bottom: none;
}

.badge {
    font-weight: 500;
    padding: 0.35em 0.65em;
}

.btn {
    font-weight: 500;
}

code {
    background-color: #f1f3f5;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
}

.alert {
    border: none;
    border-left: 4px solid;
}

.alert-success {
    border-left-color: #28a745;
}

.alert-danger {
    border-left-color: #dc3545;
}

.alert-warning {
    border-left-color: #ffc107;
}

.alert-info {
    border-left-color: #17a2b8;
}

.vh-100 {
    min-height: 100vh;
}

.modal-content {
    border: none;
    box-shadow: 0 5px 15px rgba(0,0,0,.3);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-control:focus,
.form-select:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13,110,253,.25);
}

@media (max-width: 768px) {
    .container-fluid {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}