body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

.card {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

pre code {
    background: #f5f5f5;
    padding: 1rem;
    display: block;
    border-radius: 4px;
    overflow-x: auto;
}

.alert {
    border-radius: 8px;
}

.btn {
    border-radius: 6px;
}

footer {
    margin-top: auto;
}