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

.btn-primary {
    background-color: #E53935;
    border-color: #E53935;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: #C62828;
    border-color: #C62828;
}

.navbar-dark .navbar-brand {
    color: #fff;
}

.navbar-dark .nav-link.active {
    color: #fff;
    font-weight: 500;
}

.card {
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.modal-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
}