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

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    color: #000;
    background: #fff;
    padding: 2rem;
}

main {
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.modules {
    list-style: none;
}

.modules li {
    margin-bottom: 1rem;
}

.modules a {
    display: block;
    padding: 1rem;
    border: 1px solid #000;
    text-decoration: none;
    color: #000;
    background: #fff;
    transition: background 0.2s;
}

.modules a:hover {
    background: #f0f0f0;
}

.module-title {
    font-weight: bold;
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.module-description {
    color: #666;
    font-size: 0.9rem;
}

.intro {
    margin-bottom: 2rem;
    color: #333;
}