body {
    background-color: #f5f5f0;
}

.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border-radius: 12px;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: bold;
}

.event-overdue {
    border-left: 4px solid #dc3545;
    background-color: #fff5f5;
}

.event-upcoming {
    border-left: 4px solid #ffc107;
}

.event-done {
    border-left: 4px solid #198754;
    opacity: 0.6;
}