/* ljh-sh/fio site — clean dark theme, monospace-friendly, responsive */
:root {
    --bg: #0d1117;
    --bg-elevated: #161b22;
    --border: #30363d;
    --fg: #e6edf3;
    --fg-muted: #8b949e;
    --accent: #58a6ff;
    --accent-strong: #1f6feb;
    --maxw: 920px;
    --radius: 6px;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    line-height: 1.6;
    font-size: 16px;
}

.wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* typography */
h1, h2, h3, h4 { line-height: 1.25; margin-top: 2rem; }
h1 { font-size: 2.4rem; margin-top: 0; border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
h2 { font-size: 1.6rem; border-bottom: 1px solid var(--border); padding-bottom: .35rem; }
h3 { font-size: 1.2rem; }
.kicker { color: var(--fg-muted); margin: -0.5rem 0 1rem; }

p, ul, ol, table { margin: 1rem 0; }
ul, ol { padding-left: 1.5rem; }
li { margin: .3rem 0; }

/* nav + footer */
.section-nav {
    color: var(--fg-muted);
    font-family: var(--mono);
    font-size: .9rem;
    margin: 1.5rem 0;
    padding: .75rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.section-nav strong { color: var(--fg); }
.section-nav a { margin-right: .25rem; }

footer {
    margin-top: 4rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--fg-muted);
    font-family: var(--mono);
    font-size: .9rem;
}

/* code blocks */
code, pre {
    font-family: var(--mono);
    font-size: .9rem;
}
code {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
}
pre {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    overflow-x: auto;
    line-height: 1.45;
}
pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: var(--fg);
}

/* inline comment in tldr pre blocks */
pre code b { color: var(--fg-muted); font-weight: 500; }

/* hero */
.hero h1 { font-size: 3rem; border-bottom: 0; padding-bottom: 0; }
.hero .tagline { font-size: 1.15rem; color: var(--fg-muted); margin: .25rem 0 1rem; }
.hero .byline { color: var(--fg-muted); font-size: .95rem; }
.hero .meta { color: var(--fg-muted); font-family: var(--mono); font-size: .85rem; }

/* cta button */
.cta {
    display: inline-block;
    background: var(--accent-strong);
    color: #fff;
    padding: .65rem 1.25rem;
    border-radius: var(--radius);
    margin: .25rem .25rem .25rem 0;
    font-weight: 600;
}
.cta.secondary { background: transparent; border: 1px solid var(--border); color: var(--fg); }
.cta:hover { text-decoration: none; filter: brightness(1.15); }

/* callout */
.callout {
    background: var(--bg-elevated);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    color: var(--fg);
}

/* download platforms */
.platforms {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}
.platform {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    background: var(--bg-elevated);
}
.platform .badge {
    display: inline-block;
    background: var(--accent-strong);
    color: #fff;
    border-radius: 3px;
    padding: 2px 8px;
    font-size: .75rem;
    font-family: var(--mono);
    margin-bottom: .5rem;
}
.platform .name {
    font-family: var(--mono);
    font-size: .85rem;
    margin: .25rem 0;
    word-break: break-all;
}
.platform .hint {
    color: var(--fg-muted);
    font-size: .85rem;
    margin-bottom: .75rem;
}
.platform .download {
    font-family: var(--mono);
    font-size: .85rem;
}

/* tables */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: .95rem;
}
th, td {
    border-bottom: 1px solid var(--border);
    padding: .6rem .8rem;
    text-align: left;
}
th {
    background: var(--bg-elevated);
    font-weight: 600;
}
td { font-family: var(--mono); font-size: .9rem; }
td:first-child { font-family: var(--sans); font-weight: 500; }

/* skip link */
.skip {
    position: absolute; left: -9999px;
}
.skip:focus {
    position: static; display: inline-block;
    background: var(--accent-strong); color: #fff;
    padding: .5rem 1rem; border-radius: var(--radius);
}

/* responsive */
@media (max-width: 600px) {
    .hero h1 { font-size: 2.2rem; }
    .wrap { padding: 1.5rem 1rem 3rem; }
}