body { font-family: Arial, sans-serif; max-width: 600px; margin: 2rem auto; }
label { display: block; margin-bottom: 0.5rem; }
input { padding: 0.4rem; width: 100%; max-width: 300px; }
button { padding: 0.6rem 1rem; margin-top: 1rem; }
.error { color: #c00; }
.success { color: #090; }
.info { color: #06c; }

nav a { margin:0 4px; } nav { margin-bottom:1rem; }

h1 {
    color: green;
}