:root {
            --primary: #6366f1;
            --text: #1e293b;
            --text-muted: #64748b;
            --bg: #f8fafc;
            --card-bg: #ffffff;
            --border: #e2e8f0;
        }

        body {
            font-family: 'Noto Sans JP', sans-serif;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
            line-height: 1.6;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        header {
            background: white;
            padding: 20px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: block;
            text-align: center;
        }

        h1 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 1.8rem;
        }

        section {
            background: var(--card-bg);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            margin-bottom: 40px;
            scroll-margin-top: 100px;
        }

        h2 {
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }

        h3 {
            margin-top: 25px;
            margin-bottom: 10px;
            font-size: 1.1rem;
        }

        p,
        ul {
            margin-bottom: 15px;
            font-size: 0.95rem;
        }

        ul {
            padding-left: 20px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
        }

        th,
        td {
            border: 1px solid var(--border);
            padding: 12px;
            text-align: left;
        }

        th {
            background: #f1f5f9;
            width: 30%;
            font-weight: bold;
        }

        .toc {
            background: white;
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 40px;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }

        .toc a {
            color: var(--primary);
            text-decoration: none;
            font-weight: bold;
            padding: 8px 16px;
            border-radius: 20px;
            background: #e0e7ff;
            transition: all 0.2s;
        }

        .toc a:hover {
            background: var(--primary);
            color: white;
        }

        @media (max-width: 600px) {
            section {
                padding: 20px;
            }

            th,
            td {
                display: block;
                width: 100%;
            }

            th {
                background: #f8fafc;
            }
        }