* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}

nav {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid #ddd;
    margin-bottom: 2rem;
}

nav a {
    text-decoration: none;
    color: #2563eb;
    font-weight: 500;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}

select, input, button {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background: #2563eb;
    color: #fff;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

ul {
    list-style: none;
}

li {
    padding: 1rem;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

li h2 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

@media (max-width: 768px) {
    body { padding: 0.5rem; }
    nav { flex-wrap: wrap; gap: 0.3rem; font-size: 0.85rem; }
    h1 { font-size: 1.2rem; }
    form input, form select, form button { font-size: 0.9rem; }
    li { padding: 0.75rem; }
}