:root {
    --bg: #ffffff;
    --fg: #1c1c1e;
    --muted: #6e6e73;
    --link: #007aff;
    --border: #e5e5ea;
    --code-bg: #f2f2f7;
    --blockquote-bar: #d1d1d6;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --fg: #f2f2f7;
        --muted: #98989d;
        --link: #0a84ff;
        --border: #2c2c2e;
        --code-bg: #1c1c1e;
        --blockquote-bar: #3a3a3c;
    }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font: -apple-system-body;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.55;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
}

main {
    max-width: 720px;
    margin: 0 auto;
    padding: 20px 18px 60px;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
    margin: 1.6em 0 0.6em;
    font-weight: 600;
}
h1 { font-size: 1.8rem; margin-top: 0.4em; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1em; }

a {
    color: var(--link);
    text-decoration: none;
}
a:hover, a:active { text-decoration: underline; }

ul, ol { padding-left: 1.4em; margin: 0 0 1em; }
li { margin-bottom: 0.35em; }

blockquote {
    margin: 1em 0;
    padding: 0.4em 1em;
    border-left: 3px solid var(--blockquote-bar);
    color: var(--muted);
    background: transparent;
}

code, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.92em;
    background: var(--code-bg);
    border-radius: 4px;
}
code { padding: 0.1em 0.35em; }
pre {
    padding: 0.8em 1em;
    overflow-x: auto;
}

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 2em 0;
}

img { max-width: 100%; height: auto; }

.site-footer {
    margin-top: 3em;
    padding-top: 1em;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
}

/* Landing page (site only) */
.landing { text-align: center; padding-top: 60px; }
.landing .links { display: flex; flex-direction: column; gap: 12px; max-width: 360px; margin: 24px auto; }
.landing .links a {
    display: block;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
}