:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --code-bg: #1f2937;
    --accent-color: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
}
...
article p {
    margin-bottom: 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Header */
header {
    /* background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); */
    /* color: white; */
    padding: 2rem 0 0;
    /* box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); */
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo-space {
    height: 40px;
    width: 40px;
    flex-shrink: 0;
    background-image: url('./logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.header-content {
    flex: 1;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

header .meta {
    opacity: 0.9;
    font-size: 0.75rem;
}

/* Main Layout */
.main-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    /* margin-top: 2rem; */
    margin-bottom: 3rem;
}

/* Article */
article {
}

article h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

article h3 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
}

article p {
    margin-bottom: 1rem;
}

article ul, article ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

article li {
    margin-bottom: 0.5rem;
}

/* Table */
.table-container {
    overflow-x: auto;
    width: 100%;
    margin: 1.5rem 0;
    -webkit-overflow-scrolling: touch; /* iOSでの滑らかなスクロール */
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.table-container::-webkit-scrollbar {
    height: 8px;
}

.table-container::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.table-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

.table-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 700px; /* 横スクロールを確実に発生させるための最低幅 */
}

table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

table tr:hover {
    background-color: #f3f4f6;
}

table tr:nth-child(even) {
    background-color: #f9fafb;
}

/* Sidebar */
aside {
    position: sticky;
    top: 20px;
    height: fit-content;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}

/* Floating TOC */
.toc-floating {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    max-width: 200px;
    max-height: 60vh;
    overflow-y: auto;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 100;
    border-radius: 12px;
}

.toc-floating h3 {
    font-size: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.toc-floating ul {
    list-style: none;
    margin: 0;
}

.toc-floating a {
    color: var(--text-light);
    text-decoration: none;
    display: block;
    padding: 0.25rem 0;
    font-size: 1rem;
    transition: color 0.2s;
}

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

@media (max-width: 1024px) {
    .toc-floating {
        display: none;
    }

    header {
        padding: 0;
        gap: 1rem;
    }

    .container {
        padding: 16px;
    }

    header h1 {
        font-size: 1.5rem;
    }
}

.sidebar-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.sidebar-card h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.sidebar-card ul {
    list-style: none;
    margin: 0;
}

.sidebar-card a {
    color: var(--text-light);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
    transition: color 0.2s;
}

.sidebar-card a:hover {
    color: var(--primary-color);
}

/* Tags */
.tag {
    display: inline-block;
    background: var(--bg-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    margin: 0.25rem;
    color: var(--text-light);
}

/* タグセクションごと非表示 */
.tag-container {
    display: none;
}

/* Footer */
footer {
    /* background: var(--code-bg); */
    /* color: white; */
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    font-size: 0.7rem;
}

/* Article List (for top page) */
.article-list {
    list-style: none;
}

.article-list li {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.article-list li:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.article-list a {
    text-decoration: none;
    color: var(--text-color);
}

.article-list h2 {
    font-size: 1.4rem;
    margin: 0 0 0.5rem 0;
    color: var(--primary-color);
    border: none;
    padding: 0;
}

.article-list .meta {
    color: var(--text-light);
    font-size: 0.9rem;
}

.article-list .excerpt {
    margin-top: 0.75rem;
    color: var(--text-color);
}

/* Code */
code {
    background: var(--bg-color);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    font-size: 0.9em;
}

pre {
    background: var(--code-bg);
    color: #f9fafb;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* Page Top Button */
.page-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.page-top-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

/* AI Disclaimer */
.ai-disclaimer {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .ai-disclaimer {
        font-size: 0.75rem;
    }
}