body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
}

.navbar-brand {
    font-weight: 600;
    color: #2c3e50 !important;
}

.nav-link.active {
    font-weight: 500;
}

main {
    min-height: calc(100vh - 200px);
}

.card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

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

footer {
    background-color: #f8f9fa !important;
}

.lead {
    font-size: 1.15rem;
    font-weight: 300;
}

/* Accessibility improvements */
.visually-hidden-focusable:focus {
    position: absolute !important;
    width: auto !important;
    height: auto !important;
    padding: 8px 16px;
    margin: 0;
    background-color: #000;
    color: #fff;
    text-decoration: none;
    z-index: 1000;
}