:root {
    --paper: #f3f0e8;
    --paper-2: #ebe6da;
    --card: #fbfaf6;
    --ink: #16150f;
    --ink-2: #4a473d;
    --ink-3: #7a7668;
    --rule: #d8d2c3;
    --signal: #0b8f6a;
    --signal-ink: #06664b;
    --amber: #c27c0e;
    --red: #b4402c;
    --code-bg: #15140f;
    --code-ink: #ece7da;
    --serif: 'Fraunces', Georgia, serif;
    --sans: 'IBM Plex Sans', system-ui, sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, monospace;
    color-scheme: light;
}
@media (prefers-color-scheme: dark) {
    :root {
        --paper: #11120f;
        --paper-2: #181a16;
        --card: #1a1c18;
        --ink: #ece8dc;
        --ink-2: #b9b4a5;
        --ink-3: #8a8676;
        --rule: #2c2f29;
        --signal: #2fd3a0;
        --signal-ink: #5fe3ba;
        --amber: #f0b445;
        --code-bg: #0a0b09;
        color-scheme: dark;
    }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 17px/1.65 var(--sans);
    background-image: radial-gradient(var(--rule) 0.6px, transparent 0.6px);
    background-size: 22px 22px;
    background-attachment: fixed;
}
a { color: var(--signal-ink); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
img { max-width: 100%; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* masthead + ticker */
.masthead { border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(6px); position: sticky; top: 0; z-index: 5; }
.masthead .wrap { display: flex; align-items: center; justify-content: space-between; height: 58px; gap: 16px; }
.brand { font: 600 15px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand b { color: var(--signal); font-weight: 700; }
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px color-mix(in srgb, var(--signal) 22%, transparent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--signal) 6%, transparent); } }
nav.top { display: flex; gap: 22px; font: 500 14px var(--sans); }
nav.top a { color: var(--ink-2); text-decoration: none; }
nav.top a:hover, nav.top a[aria-current] { color: var(--ink); }
.ticker { border-bottom: 1px solid var(--rule); overflow: hidden; font: 12.5px var(--mono); color: var(--ink-2); background: var(--paper-2); }
.ticker .track { display: flex; gap: 42px; white-space: nowrap; padding: 7px 0; animation: tick 60s linear infinite; width: max-content; }
.ticker span b { color: var(--ink); font-weight: 600; }
.ticker .up { color: var(--signal); }
@keyframes tick { to { transform: translateX(-50%); } }

/* hero */
.hero { padding: 72px 0 40px; display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: end; }
.kicker { font: 500 12.5px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal-ink); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.015em; line-height: 1.12; font-variation-settings: 'opsz' 96; }
.hero h1 { font-size: clamp(40px, 6vw, 72px); margin: 14px 0 18px; }
.hero h1 em { font-style: italic; color: var(--signal-ink); font-weight: 500; }
.hero p.lede { font-size: 19px; color: var(--ink-2); max-width: 36em; margin: 0; }
.stat-board { border: 1px solid var(--rule); background: var(--card); border-radius: 4px; display: grid; grid-template-columns: 1fr 1fr; }
.stat-board div { padding: 18px 20px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.stat-board div:nth-child(2n) { border-right: 0; }
.stat-board div:nth-last-child(-n + 2) { border-bottom: 0; }
.stat-board b { display: block; font: 600 30px/1.1 var(--mono); letter-spacing: -0.02em; }
.stat-board span { font: 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.08em; }

/* sections + cards */
section.block { padding: 36px 0; border-top: 1px solid var(--rule); }
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.block-head h2 { font-size: 32px; margin: 0; }
.block-head p { margin: 0; color: var(--ink-3); font-size: 15px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 14px; }
.card { display: flex; flex-direction: column; gap: 10px; padding: 18px; background: var(--card); border: 1px solid var(--rule); border-radius: 4px; text-decoration: none; color: var(--ink); transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease; position: relative; }
.card:hover { transform: translateY(-2px); border-color: var(--signal); box-shadow: 0 10px 28px -18px color-mix(in srgb, var(--signal) 70%, transparent); color: var(--ink); }
.card .row { display: flex; gap: 12px; align-items: center; }
.card img { width: 38px; height: 38px; border-radius: 8px; flex: none; }
.card h3 { font-size: 19px; margin: 0; }
.card p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.5; }
.card .meta { margin-top: auto; display: flex; justify-content: space-between; font: 12.5px var(--mono); color: var(--ink-3); }
.card .meta .price { color: var(--signal-ink); font-weight: 600; }
.reveal { opacity: 0; transform: translateY(10px); animation: rise 0.6s cubic-bezier(.2,.7,.2,1) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* guide page */
.crumbs { font: 13px var(--mono); color: var(--ink-3); padding-top: 28px; }
.crumbs a { color: var(--ink-3); }
.guide { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; padding: 10px 0 70px; }
.guide > * { min-width: 0; }
.guide header h1 { font-size: clamp(34px, 4.6vw, 54px); margin: 12px 0 14px; }
.guide header .lede { font-size: 19px; color: var(--ink-2); margin: 0 0 10px; }
.byline { font: 13px var(--mono); color: var(--ink-3); display: flex; gap: 14px; flex-wrap: wrap; padding-bottom: 22px; border-bottom: 1px solid var(--rule); }
article.prose { max-width: 72ch; }
.prose h2 { font-size: 30px; margin: 48px 0 12px; padding-top: 8px; }
.prose h3 { font-size: 21px; margin: 30px 0 8px; }
.prose p, .prose li { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 4px 0; }
.prose code { font: 0.86em var(--mono); background: var(--paper-2); padding: 0.12em 0.36em; border-radius: 3px; overflow-wrap: anywhere; }
.prose blockquote { margin: 22px 0; padding: 4px 18px; border-left: 3px solid var(--amber); color: var(--ink-2); background: var(--card); }
pre { background: var(--code-bg); color: var(--code-ink); padding: 16px 18px; border-radius: 4px; overflow-x: auto; font: 13.5px/1.6 var(--mono); margin: 18px 0; }
pre code { background: none !important; padding: 0 !important; font-size: inherit !important; color: inherit; }
.table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--rule); border-radius: 4px; background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font: 600 12px var(--mono); text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-3); background: var(--paper-2); }
tr:last-child td { border-bottom: 0; }
td.num { font-family: var(--mono); white-space: nowrap; }
.fine { font-size: 13.5px; color: var(--ink-3); }
figure.sample { margin: 18px 0; }
figure.sample figcaption { display: flex; flex-wrap: wrap; gap: 4px 12px; justify-content: space-between; font: 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: -10px; }
figure.sample figcaption span { min-width: 0; overflow-wrap: anywhere; }
figure.sample figcaption span:first-child { color: var(--signal-ink); font-weight: 600; }
.mono { font-family: var(--mono); }
.tabs { display: flex; flex-wrap: wrap; margin: 18px 0; }
.tabs input { position: absolute; opacity: 0; pointer-events: none; }
.tabs label { font: 500 13px var(--mono); padding: 8px 14px; cursor: pointer; color: var(--ink-3); border-bottom: 2px solid transparent; }
.tabs input:checked + label { color: var(--ink); border-color: var(--signal); }
.tabs input:focus-visible + label { outline: 2px solid var(--signal); }
.tabs pre { order: 99; width: 100%; display: none; margin-top: 0; border-top-left-radius: 0; }
.tabs input:checked + label + pre { display: block; }
.btn { display: inline-block; background: var(--ink); color: var(--paper); padding: 12px 18px; border-radius: 3px; font: 600 15px var(--sans); text-decoration: none; transition: background 0.15s; }
.btn:hover { background: var(--signal-ink); color: var(--paper); }
.cta-row { margin: 26px 0; }

/* spec card */
aside.spec { position: sticky; top: 86px; align-self: start; display: flex; flex-direction: column; gap: 14px; }
.spec-card { background: var(--card); border: 1px solid var(--rule); border-radius: 4px; padding: 18px; }
.spec-card .row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.spec-card img { width: 44px; height: 44px; border-radius: 9px; }
.spec-card h4 { margin: 0; font: 600 16px/1.3 var(--sans); }
.spec-card dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; font-size: 14px; }
.spec-card dt { font: 12px var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); padding-top: 2px; }
.spec-card dd { margin: 0; font-family: var(--mono); }
.spec-card .btn { width: 100%; text-align: center; margin-top: 16px; }
.toc { font-size: 14px; }
.toc b { font: 600 12px var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-3); }
.toc ol { padding-left: 1.2em; margin: 8px 0 0; }
.toc li { margin: 4px 0; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--signal-ink); }

footer.site { border-top: 1px solid var(--rule); padding: 30px 0 46px; font-size: 14px; color: var(--ink-3); }
footer.site .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
footer.site a { color: var(--ink-2); }

@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; padding-top: 44px; gap: 28px; }
    .guide { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    aside.spec { position: static; order: -1; }
    .toc { display: none; }
    nav.top { gap: 14px; font-size: 13px; }
    body { font-size: 16.5px; }
}
@media (max-width: 520px) {
    .masthead .wrap { height: auto; min-height: 58px; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; gap: 12px; }
    nav.top { width: 100%; justify-content: space-between; gap: 8px; }
    nav.top a.hide-sm { display: none; }
    .stat-board b { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
    .ticker .track, .brand .dot, .reveal { animation: none; }
    .reveal { opacity: 1; transform: none; }
    .card, .btn { transition: none; }
}