body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    max-width: 600px;
    margin: 60px 20px;
    padding: 0 20px;
    line-height: 1.6;
    color: #333;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #1a1a1a;
}

.description {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 2rem;
}

.link-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.link-list > li {
    margin-bottom: 0.5rem;
}

details {
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

details:hover {
    border-color: #bbb;
}

summary {
    list-style: none;
    cursor: pointer;
    padding: 12px 16px;
    font-size: 1.05rem;
    color: #0066cc;
    font-weight: 500;
    user-select: none;
    transition: background-color 0.2s;
}

summary::-webkit-details-marker {
    display: none;
}

summary:hover {
    background-color: #f5f5f5;
}

.sub-list {
    list-style: none;
    padding: 0 16px 12px 16px;
    margin: 0;
}

.sub-list li {
    padding: 6px 0;
    border-bottom: 1px solid #eee;
}

.sub-list li:last-child {
    border-bottom: none;
}

.sub-list a {
    text-decoration: none;
    color: #0066cc;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.sub-list a:hover {
    color: #004499;
    text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    h1 {
        color: #f0f0f0;
    }

    .description {
        color: #b0b0b0;
    }

    details {
        border-color: #444;
    }

    details:hover {
        border-color: #666;
    }

    summary {
        color: #66b3ff;
    }

    summary:hover {
        background-color: #2a2a2a;
    }

    .sub-list li {
        border-bottom-color: #333;
    }

    .sub-list a {
        color: #66b3ff;
    }

    .sub-list a:hover {
        color: #99ccff;
    }
}
test2