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

:root {
    --primary-color: #333;
    --text-color-dark: #333;
    --text-color-light: #666;
    --link-color: #333;
    --link-hover-color: #555;
    --border-color: #ddd;
    --bg-color-alt: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: #f8f9fa;
    padding: 1rem;
    border-bottom: 1px solid #ddd;
}

header h1 a {
    text-decoration: none;
    color: #333;
    font-size: 1.8rem;
}

nav {
    margin-top: 1rem;
}

nav a {
    margin-right: 1rem;
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: #333;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #fff;
}

nav a:hover {
    background: #f0f0f0;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    flex: 1;
}

/* パンくずリスト */
.breadcrumbs {
    margin: 15px 0;
    font-size: 0.9rem;
    color: var(--text-color-light);
}

.breadcrumbs span {
    margin: 0 5px;
}

.breadcrumbs a {
    color: var(--link-color);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

h2 {
    margin-bottom: 1rem;
    color: #333;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.category-card {
    border: 1px solid #ddd;
    padding: 1.5rem;
    border-radius: 4px;
    background: #fff;
    text-decoration: none;
    color: #333;
    transition: background 0.2s;
}

.category-card:hover {
    background: #f8f9fa;
}

.category-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.category-card p {
    color: #666;
    font-size: 0.9rem;
}

.command-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.command-table th,
.command-table td {
    padding: 12px;
    border: 1px solid #ddd;
    text-align: left;
    vertical-align: top;
}

.command-table th {
    background: #f8f9fa;
    font-weight: 600;
}

code {
    background: #f8f9fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9rem;
}

.copy-btn {
    background: #333;
    color: white;
    border: none;
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 14px;
}

.copy-btn:hover {
    background: #555;
}

.copy-btn.copied {
    background: #666;
}

.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    text-decoration: none;
    color: #333;
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #fff;
}

.back-link:hover {
    background: #f0f0f0;
}

/* レスポンシブ */
@media (max-width: 768px) {
    main {
        padding: 1rem;
    }
    
    nav a {
        display: block;
        margin: 0.25rem 0;
    }
    
    .command-table {
        font-size: 14px;
    }
    
    .command-table th,
    .command-table td {
        padding: 8px;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
}

/* サイトフッター */
.site-footer {
    background-color: #f5f5f5;
    padding: 20px 0;
    margin-top: 40px;
    border-top: 1px solid #e5e5e5;
}

.site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.footer-content {
    text-align: center;
}

.footer-links {
    margin-bottom: 15px;
}

.footer-links a {
    color: #555;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

.separator {
    color: #999;
}

.copyright {
    color: #777;
    font-size: 0.9em;
}

@media (max-width: 768px) {
    .site-footer {
        padding: 30px 0;
    }
    
    .footer-links {
        display: flex;
        flex-direction: column;
        align-items: center;
        line-height: 2.5;
        margin-bottom: 20px;
    }
    
    .footer-links a {
        margin: 0;
        padding: 8px 16px;
        display: block;
        font-size: 16px;
    }
    
    .separator {
        display: none;
    }
    
    .copyright {
        font-size: 14px;
        line-height: 1.6;
    }
}