html {
    scroll-behavior: smooth;
}

:root {
    --sidebar-w: 260px;
    --gap: 24px;
    --bg: #f8f9fa;
    --fg: #333;
    --primary: #2c3e50;
    --link: #2980b9;
    --card: #fff;
    --border: #ddd;
    --sborder: #ccc;
    --hover: #d6e9f8;
}

body {
    font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
    margin: var(--gap);
    margin-left: calc(var(--sidebar-w) + var(--gap));
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
}

h1 {
    text-align: left;
    font-size: 2em;
    margin: 0 0 24px 0;
    color: var(--primary);
}

.toc {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-w);
    overflow-y: auto;
    background: #fff;
    border-right: 1px solid var(--border);
    box-sizing: border-box;
    padding: 20px 16px;
}

.toc h2 {
    margin: 6px 0 12px 0;
    font-size: 1.1em;
    color: var(--primary);
}

.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: block;
}

.toc li {
    margin: 6px 0;
}

.toc a {
    color: var(--link);
    text-decoration: none;
    font-size: 0.95em;
    padding: 6px 10px;
    border-radius: 6px;
    display: block;
    background: #f7fbff;
    transition: background 0.2s, color 0.2s;
}

.toc a.link {
    display: block;
    margin-top: 32px;
    border-top: 1px solid var(--border);
    padding-top: 8px;
}

.toc a:hover,
.toc a:focus {
    background: var(--hover);
    outline: none;
}

.category {
    scroll-margin-top: 12px;
}

.category {
    margin-bottom: 40px;
}

.category .item {
    background: var(--card);
    border: 1px solid var(--sborder);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 1.3em;
    margin: 24px 0 12px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.category h3 {
    background: var(--primary);
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 1.3em;
    margin: 24px 0 12px 15px;
}

.mod-block,
.block {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0 15px 30px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mod-block:hover,
.block:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.mod-block h4 {
    margin: 0 0 8px 0;
    font-size: 1.2em;
}

.mod-block a,
.block a {
    color: var(--link);
    text-decoration: none;
}

.mod-block a:hover,
.block a:hover {
    text-decoration: underline;
}

.mod-block p {
    margin: 5px 0 10px 0;
    font-size: 0.95em;
    color: #555;
}

.addons {
    list-style-type: disc;
    margin: 8px 0 0 20px;
    padding: 0;
}

.addons li {
    margin: 4px 0;
    font-size: 0.9em;
}

.category h3+.mod-block h4 {
    font-size: 1.05em;
}

.mod-icon {
    width: 64px;
    height: 64px;
    object-fit: contain;
    border-radius: 6px;
    vertical-align: middle;
    margin-right: 8px;
}

@media (max-width: 960px) {
    body {
        margin: var(--gap);
        margin-top: calc(var(--gap) + 8px);
        margin-left: var(--gap);
    }

    .toc {
        position: static;
        height: auto;
        width: auto;
        border-right: none;
        border: 1px solid var(--border);
        border-radius: 8px;
        margin-bottom: 16px;
        background: #fff;
    }

    .toc ul {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .toc li {
        margin: 0;
    }

    .toc a {
        display: inline-block;
    }

    h1 {
        text-align: center;
        margin-bottom: 16px;
    }
}