:root {
    --text: #1a1f36;
    --muted: #6b7280;
    --border: #e6e8eb;
    --bg: #ffffff;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.topbar {
    border-bottom: 1px solid var(--border);
    padding: 14px 20px;
    font-size: 14px;
    color: var(--muted);
}

.container {
    max-width: 760px;
    margin: 60px auto;
    padding: 0 20px;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

h2 {
    margin-top: 40px;
    font-size: 20px;
}

h3 {
    margin-top: 24px;
    font-size: 16px;
}

p {
    line-height: 1.7;
}

ul {
    padding-left: 20px;
}

li {
    margin: 6px 0;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 40px 0;
}

.meta {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 30px;
}

code {
    background: #f6f9fc;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 90%;
}

pre {
    background: #f6f9fc;
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --text: #e5e7eb;
        --muted: #9ca3af;
        --border: #2a2f45;
        --bg: #0f172a;
    }

    code, pre {
        background: #1e293b;
    }
}