:root { color-scheme: light; }
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: 'Geist', system-ui, -apple-system, sans-serif;
    color: #0f172a;
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
    line-height: 1.65;
}
a { color: #000; }
a:hover { text-decoration: underline; }

header.top {
    border-bottom: 1px solid #f1f5f9;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header.top .brand {
    font-weight: 600;
    color: #000;
    text-decoration: none;
}
header.top nav a {
    color: #475569;
    margin-left: 20px;
    font-size: 14px;
    text-decoration: none;
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}
h1 { font-size: 30px; margin: 0 0 6px; line-height: 1.15; }
h2 { font-size: 20px; margin: 32px 0 10px; }
h3 { font-size: 16px; margin: 20px 0 6px; }
p, li {
    color: #334155;
    font-size: 15px;
}
ul, ol { padding-left: 22px; }
.lede { color: #64748b; font-size: 16px; margin-bottom: 12px; }
.meta { color: #64748b; font-size: 13px; margin-bottom: 28px; }

code {
    background: #f1f5f9;
    padding: 1px 6px;
    border-radius: 4px;
    font-family: 'Geist Mono', ui-monospace, monospace;
    font-size: 0.92em;
}

.cta {
    display: inline-block;
    margin-top: 4px;
    padding: 10px 16px;
    border-radius: 12px;
    background: #000;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}
.cta:hover { background: #1f2937; text-decoration: none; }

ul.related { list-style: none; padding-left: 0; }
ul.related li { margin: 6px 0; }
ul.related a { color: #0f172a; }

details.faq {
    border-top: 1px solid #f1f5f9;
    padding: 14px 0;
}
details.faq:first-of-type { border-top: 0; }
details.faq > summary {
    list-style: none;
    cursor: pointer;
    font-weight: 600;
    color: #0f172a;
    font-size: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
details.faq > summary::-webkit-details-marker { display: none; }
details.faq > summary::after {
    content: '+';
    font-size: 18px;
    color: #94a3b8;
}
details.faq[open] > summary::after { content: '–'; }
details.faq > p { margin: 10px 0 0; color: #334155; }

footer.bot {
    border-top: 1px solid #f1f5f9;
    padding: 24px;
    text-align: center;
    color: #94a3b8;
    font-size: 12px;
}
footer.bot a {
    color: #64748b;
    margin: 0 8px;
    text-decoration: none;
}
footer.bot a:hover { color: #000; }