/* Custom CSS for EduHub */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

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

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.card-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.btn {
    border-radius: 0.375rem;
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

.sidebar {
    min-height: calc(100vh - 56px);
}

.sidebar .nav-link {
    color: #495057;
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin-bottom: 0.25rem;
}

.sidebar .nav-link:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.stats-card {
    transition: transform 0.2s;
}

.stats-card:hover {
    transform: translateY(-5px);
}