body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

.card {
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.btn {
    transition: all 0.2s;
}

#modelPreview {
    border-radius: 8px;
}

footer {
    margin-top: auto;
}

@media (max-width: 768px) {
    .navbar-nav {
        text-align: center;
    }
}