:root {
    --bg: #fafaf9;
    --fg: #1c1917;
    --muted: #78716c;
    --accent: #2563eb;
    --border: #e7e5e4;
    --card-bg: #ffffff;
    --section-bg: #f5f5f4;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0c0a09;
        --fg: #e7e5e4;
        --muted: #a8a29e;
        --accent: #60a5fa;
        --border: #292524;
        --card-bg: #1c1917;
        --section-bg: #1c1917;
    }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.7;
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.8rem; margin-bottom: 0.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.8rem; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
p { margin-bottom: 1rem; }
hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
blockquote {
    border-left: 3px solid var(--accent);
    padding: 0.5rem 1rem;
    margin: 1rem 0;
    color: var(--muted);
    font-style: italic;
}
code {
    background: var(--section-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}
strong { font-weight: 600; }
.header { margin-bottom: 2rem; }
.header .subtitle {
    color: var(--muted);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}
.nav { margin-bottom: 2rem; }
.nav a { margin-right: 1.5rem; font-size: 0.9rem; }
.issue-list { list-style: none; }
.issue-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}
.issue-list li:last-child { border-bottom: none; }
.issue-list .date {
    font-weight: 600;
    font-size: 1.05rem;
}
.issue-list .weekday {
    color: var(--muted);
    font-size: 0.85rem;
    margin-left: 0.5rem;
}
.subscribe-box {
    background: var(--section-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.2rem 1.5rem;
    margin: 2rem 0;
}
.subscribe-box p { margin-bottom: 0.5rem; }
.subscribe-box a { font-weight: 500; }
.footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.85rem;
}