:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --accent-color: #3498db;
    --comment-color: #888;
    --quote-bg: #ececec;
    --max-width: 740px;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

header {
    padding: 80px 0 40px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

h1 { font-size: 2.2rem; margin-bottom: 10px; }
.subtitle { font-size: 1.2rem; color: #555; }
.author { margin-top: 20px; font-weight: bold; }

main { padding: 40px 0; }

.meta-comment {
    font-family: 'JetBrains Mono', monospace;
    color: var(--comment-color);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

blockquote {
    background: var(--quote-bg);
    border-left: 5px solid var(--accent-color);
    margin: 30px 0;
    padding: 20px;
    font-style: italic;
}

h2 {
    margin-top: 50px;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 5px;
}

hr {
    border: 0;
    border-top: 1px solid #ddd;
    margin: 40px 0;
}

.code-context {
    background: #2d3436;
    color: #dfe6e9;
    padding: 20px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.95rem;
    margin: 20px 0;
}

#progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: transparent;
    z-index: 1000;
}

#progress-bar {
    height: 100%;
    background: var(--accent-color);
    width: 0%;
    transition: width 0.1s ease;
}

footer {
    text-align: center;
    padding: 40px 0;
    font-size: 0.8rem;
    color: #777;
    border-top: 1px solid #ddd;
}