:root {
    --bg: #F7F8FA; --bg-alt: #FFFFFF; --fg: #10141B; --fg-mute: #4F5866; --fg-soft: #5E6775;
    --rule: #DFE3E9; --accent: #1D5BA6; --accent-fg: #FFFFFF; --wash: rgba(29,91,166,.07);
    --shadow-m: 0 1px 2px rgba(13,16,22,.05), 0 10px 28px rgba(13,16,22,.07);
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
    --s1: .5rem; --s2: .875rem; --s3: 1.375rem; --s4: 2.25rem; --s5: 3.25rem; --s6: 5rem;
    color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0D1016; --bg-alt: #161B24; --fg: #EBEEF3; --fg-mute: #A2AAB7; --fg-soft: #8A93A2;
        --rule: #262E3B; --accent: #8AB4F8; --accent-fg: #0D1016; --wash: rgba(138,180,248,.08);
        --shadow-m: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.4);
    }
}

*, *::before, *::after { box-sizing: border-box; }
img { max-width: 100%; height: auto; }
body {
    margin: 0; background: var(--bg); color: var(--fg);
    font-family: var(--sans); font-size: 1.0625rem; line-height: 1.6;
    -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -999px; top: 0; }
.skip:focus { left: var(--s2); top: var(--s2); z-index: 20; padding: .5rem .9rem; background: var(--bg-alt); color: var(--fg); }

.wrap { max-width: 1040px; margin-inline: auto; padding-inline: 1rem; }
@media (min-width: 640px) { .wrap { padding-inline: var(--s3); } }

.site-top {
    position: sticky; top: 0; z-index: 10;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    -webkit-backdrop-filter: saturate(1.4) blur(10px); backdrop-filter: saturate(1.4) blur(10px);
    border-bottom: 1px solid var(--rule);
    font-family: var(--sans); font-size: .9375rem; line-height: 1.4;
}
.site-top .wrap { display: flex; flex-wrap: wrap; align-items: center; column-gap: var(--s3); min-height: 56px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; padding-block: .75rem; margin-right: auto;
    color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: -.01em; font-size: 1.0625rem; }
.brand-mark { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 7px;
    background: var(--fg); color: var(--bg); font-family: var(--mono); font-size: .875rem; font-weight: 700; }
.site-nav { display: flex; flex-wrap: wrap; gap: .25rem; margin-inline: -.6rem; }
.site-nav a { padding: .7rem .6rem; color: var(--fg-mute); text-decoration: none; border-radius: 6px; }
.site-nav a:hover { color: var(--fg); }
@media (max-width: 479px) {
    .site-top .wrap { padding-bottom: .15rem; }
    .site-nav { flex-basis: 100%; }
}
@media print { .site-top { position: static; } }

.site-foot { border-top: 1px solid var(--rule); margin-top: var(--s6); font-size: .875rem; color: var(--fg-soft); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: var(--s1) var(--s4); padding-block: var(--s4); }
.site-foot nav { display: flex; flex-wrap: wrap; gap: var(--s1) var(--s3); }
.site-foot a { color: inherit; text-decoration: none; }
.site-foot a:hover { color: var(--fg); text-decoration: underline; }