:root {
--bg: #0f1115; --panel: #181b22; --panel-2: #1f232c; --border: #2a2f3a;
--text: #e7eaf0; --muted: #9aa3b2; --accent: #4f8cff;
--good: #57ab5a; --warn: #d4a72c; --bad: #e5534b;
--header-bg: rgba(15,17,21,.84); --tint: rgba(255,255,255,.02);
--shadow: 0 20px 50px rgba(0,0,0,.45);
}
@media (prefers-color-scheme: light) {
:root {
--bg: #f5f7fb; --panel: #ffffff; --panel-2: #eef2f7; --border: #dde1e8;
--text: #1a1d24; --muted: #5b6472; --accent: #3b6fe0;
--good: #268042; --warn: #94690f; --bad: #cb4036;
--header-bg: rgba(255,255,255,.86); --tint: rgba(20,26,40,.022);
--shadow: 0 18px 44px rgba(20,26,40,.10);
}
}
/* Icon shapes for CSS-only decoration. data: URIs in a mask, so they inherit the
live accent instead of baking a colour in. */
:root {
--ico-search: url('data:image/svg+xml;utf8,');
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column;
font: 16px/1.7 -apple-system, "Segoe UI", Roboto, sans-serif;
background: var(--bg); color: var(--text); }
/* Small accent-coloured text and the white-on-accent button both fall under 4.5:1
with the raw accent; these derived tokens clear AA in each theme. */
:root { --accent-text: var(--accent); --accent-btn: var(--accent); }
@supports (color: color-mix(in srgb, red, blue)) {
:root { --accent-btn: color-mix(in srgb, var(--accent) 70%, #000); } /* = app/theme.py */
@media (prefers-color-scheme: light) {
:root { --accent-text: color-mix(in srgb, var(--accent) 70%, #000);
--accent-btn: color-mix(in srgb, var(--accent) 80%, #000); } /* = app/theme.py */
}
}
/* Translucent washes for tints, glows and icon tiles. Same family as
static/landing.html, so a rule can be moved between the two - but remember this
file's light/dark polarity is inverted relative to it. */
:root {
--accent-30: color-mix(in srgb, var(--accent) 30%, transparent);
--accent-05: color-mix(in srgb, var(--accent) 5%, transparent);
--accent-08: color-mix(in srgb, var(--accent) 8%, transparent);
--accent-12: color-mix(in srgb, var(--accent) 12%, transparent);
--accent-20: color-mix(in srgb, var(--accent) 20%, transparent);
--accent-45: color-mix(in srgb, var(--accent) 45%, transparent);
--good-14: color-mix(in srgb, var(--good) 14%, transparent);
--good-30: color-mix(in srgb, var(--good) 30%, transparent);
--warn-14: color-mix(in srgb, var(--warn) 14%, transparent);
--warn-30: color-mix(in srgb, var(--warn) 30%, transparent);
--bad-12: color-mix(in srgb, var(--bad) 12%, transparent);
--bad-30: color-mix(in srgb, var(--bad) 30%, transparent);
}
/* Gradient partner colour for the brand icon and CTA button, derived from the
live accent so a rebrand stays coherent. Static fallback first. */
:root { --accent-2: #7c4dd6; }
@supports (color: color-mix(in oklab, red, blue)) {
:root { --accent-2: color-mix(in oklab, var(--accent) 58%, #8b5cf6); }
}
:root { --accent2-14: color-mix(in srgb, var(--accent-2) 14%, transparent);
--accent2-32: color-mix(in srgb, var(--accent-2) 32%, transparent); }
a { color: var(--accent-text); }
body { position: relative; }
/* A soft wash behind the top of every content page, so the column does not start
against flat background. Decorative, non-interactive, and clipped by body's own
box - the page is a single column, so one blob is enough. */
body::before {
content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
width: 100%; max-width: 1100px; height: 520px; pointer-events: none; z-index: 0;
background:
radial-gradient(ellipse 42% 46% at 26% 34%, var(--accent2-14), transparent 70%),
radial-gradient(ellipse 46% 50% at 74% 28%, var(--accent-20), transparent 72%);
}
/* header.top is styled entirely in app/nav.py, including its own z-index. */
.wrap, footer { position: relative; z-index: 1; }
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 80px; flex: 1; width: 100%; }
.wrap.wide { max-width: 900px; }
.crumbs { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
h1 { font-size: clamp(26px, 4.6vw, 34px); line-height: 1.2; margin: 0 0 14px; text-wrap: balance; }
.lead { font-size: 17.5px; color: var(--muted); margin: 0 0 30px; }
h2 { font-size: 21px; margin: 38px 0 10px; text-wrap: balance; }
h3 { font-size: 16.5px; margin: 26px 0 8px; }
p { margin: 0 0 14px; }
ul, ol { padding-left: 22px; margin: 0 0 16px; }
li { margin-bottom: 8px; }
pre:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
pre { background: var(--panel); border: 1px solid var(--border); border-radius: 9px;
padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.6;
font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.callout {
position: relative; overflow: hidden;
background: linear-gradient(135deg, var(--accent-12), var(--accent2-14));
border: 1px solid var(--accent-30); border-left: 3px solid var(--accent);
border-radius: 10px; padding: 16px 18px 16px 52px; margin: 26px 0;
}
/* The magnifier sits in the padding gutter, so it never reflows the text. */
.callout::before {
content: ''; position: absolute; top: 17px; left: 17px; width: 22px; height: 22px;
background: var(--accent); pointer-events: none;
-webkit-mask: var(--ico-search) center / contain no-repeat;
mask: var(--ico-search) center / contain no-repeat;
}
.callout p:last-child { margin-bottom: 0; }
.mistakes { background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
padding: 18px 20px 6px; }
h2.group-title { font-size: 12.5px; text-transform: uppercase; letter-spacing: .09em;
color: var(--accent-text); font-weight: 700; margin: 34px 0 12px;
padding-top: 18px; border-top: 1px solid var(--border);
display: flex; align-items: center; gap: 9px; }
h2.group-title::before {
content: ''; width: 18px; height: 3px; border-radius: 2px; flex-shrink: 0;
background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); gap: 14px; }
.card { position: relative; overflow: hidden;
background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
padding: 16px 18px; text-decoration: none; color: inherit; display: block;
transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease; }
.card::after {
content: ''; position: absolute; top: -40px; right: -40px; width: 120px; height: 120px;
pointer-events: none; opacity: 0; transition: opacity .16s ease;
background: radial-gradient(circle at center, var(--accent-20), transparent 70%);
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 10px 26px var(--accent-20); }
.card:hover::after { opacity: 1; }
.card h3 { margin: 0 0 6px; font-size: 16px; color: var(--text); }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
/* Industry cards carry a small illustrated tile; plain cards simply omit it. */
.card .card-ico {
width: 40px; height: 40px; border-radius: 10px; margin-bottom: 12px;
display: flex; align-items: center; justify-content: center;
background: var(--accent-12); border: 1px solid var(--accent-30); color: var(--accent);
}
.cards > .card:nth-child(4n+2) .card-ico { background: var(--accent2-14); border-color: var(--accent2-32); color: var(--accent-2); }
.cards > .card:nth-child(4n+3) .card-ico { background: var(--good-14); border-color: var(--good-30); color: var(--good); }
.cards > .card:nth-child(4n+4) .card-ico { background: var(--warn-14); border-color: var(--warn-30); color: var(--warn); }
/* "On this page", built from the article's own H2s by _add_toc(). */
.toc { background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
padding: 14px 18px 10px; margin: 22px 0 8px; }
.toc .toc-title { margin: 0 0 6px; font-size: 12px; font-weight: 700; letter-spacing: .07em;
text-transform: uppercase; color: var(--muted); }
.toc ol { margin: 0; padding-left: 20px; columns: 2 220px; column-gap: 28px; }
.toc li { margin: 0 0 4px; break-inside: avoid; }
.toc a { display: inline-block; min-height: 24px; padding: 2px 0; }
h2[id] { scroll-margin-top: 80px; }
/* /compare/ */
.cmp-suits { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.cmp-suits > div { background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
padding: 14px 18px 4px; }
.cmp-suits h3 { margin-top: 0; }
.cmp-src { font-size: 13px; color: var(--muted); white-space: nowrap; }
/* Four and five columns don't fit a phone: scroll sideways inside .tablewrap rather
than squeeze every cell to a word wide. */
table.cmp-table { min-width: 620px; }
.cmp-src a { color: var(--muted); }
.related { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.related a { background: var(--panel); border: 1px solid var(--border); border-radius: 100px;
padding: 6px 14px; font-size: 13.5px; text-decoration: none;
transition: border-color .15s ease, background .15s ease; }
.related a:hover { border-color: var(--accent); background: var(--accent-08); }
.glossary-index { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 26px; }
.glossary-index a { background: var(--panel); border: 1px solid var(--border);
border-radius: 6px; padding: 4px 10px; font-size: 13px; text-decoration: none; }
dl { margin: 0; }
dt { font-weight: 700; margin-top: 22px; scroll-margin-top: 20px; }
dd { margin: 6px 0 0; color: var(--muted); }
.glossary-toc ul { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 6px; font-size: 14.5px; }
.glossary-toc strong { display: inline-block; min-width: 1.4em; }
/* A run of short links separated only by commas: 24px tall each (WCAG 2.2 SC 2.5.8). */
.glossary-toc a { display: inline-block; min-height: 24px; min-width: 24px; padding: 2px 0; }
.glossary-letter h2 { margin: 34px 0 4px; scroll-margin-top: 80px; }
.glossary-letter h3 { margin: 20px 0 0; font-size: 17px; scroll-margin-top: 80px; }
.gloss-def { margin: 6px 0 0; color: var(--muted); }
.gloss-guide { margin: 6px 0 0; font-size: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin-bottom: 18px; }
th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .07em;
color: var(--muted); font-weight: 600; padding: 0 10px 8px 0; border-bottom: 1px solid var(--border); }
td { padding: 9px 10px 9px 0; border-bottom: 1px solid var(--border); }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tablewrap { overflow-x: auto; }
.method-note { color: var(--muted); font-size: 13.5px; }
.barrow { display: grid; grid-template-columns: minmax(0,1fr) 78px; gap: 12px; align-items: center;
padding: 8px 0; border-bottom: 1px solid var(--border); }
.barrow:last-child { border-bottom: 0; }
.barrow .track { display: block; height: 8px; border-radius: 100px; background: var(--panel-2); margin-top: 5px; }
.barrow .track i { display: block; height: 100%; border-radius: 100px;
background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.barrow a { display: inline-block; min-height: 24px; padding: 2px 0; }
.barrow .pc { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(150px, 100%), 1fr)); gap: 14px; margin: 24px 0 30px; }
.stat { position: relative; overflow: hidden;
background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px 18px 16px; }
.stat::before {
content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
width: 46px; height: 3px; border-radius: 0 0 3px 3px;
background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.stat b { display: block; font-size: 27px; line-height: 1.1; font-variant-numeric: tabular-nums;
color: var(--accent); }
@supports ((background-clip: text) or (-webkit-background-clip: text)) {
.stat b {
background: linear-gradient(120deg, var(--accent), var(--accent-2));
-webkit-background-clip: text; background-clip: text; color: transparent;
}
}
/* Where the "number" is really a phrase (the most-common-fault tile), the gradient
reads as decoration rather than a figure, so those keep the plain text colour. */
.stat b.word { font-size: 19px; line-height: 1.25; background: none; color: var(--text);
-webkit-text-fill-color: currentColor; }
.stat span { color: var(--muted); font-size: 13.5px; }
.method { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px 6px; }
/* ---------- content-page artwork (app/industry_art.py, app/guide_art.py) ---------- */
.ind-art {
border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
background: linear-gradient(150deg, var(--accent-08), var(--accent2-14));
margin: 0 0 26px; aspect-ratio: 320 / 150;
}
.ind-art-svg { display: block; width: 100%; height: 100%; }
.ia-panel { fill: var(--panel); stroke: var(--border); stroke-width: 1.4; }
.ia-hair { stroke: var(--border); stroke-width: 1.4; fill: none; }
.ia-hair-strong { stroke: var(--border); stroke-width: 2; fill: none; stroke-linecap: round; }
.ia-dot { fill: var(--border); }
.ia-block { fill: var(--muted); opacity: .34; }
.ia-faint { fill: var(--muted); opacity: .2; }
.ia-tile { fill: var(--panel-2); stroke: var(--border); stroke-width: 1.2; }
.ia-empty { fill: none; stroke: var(--bad); stroke-width: 1.4; stroke-dasharray: 4 3; }
.ia-accent { fill: var(--accent); }
.ia-warn { fill: var(--warn); }
.ia-good { fill: var(--good); }
.ia-bad { fill: var(--bad); }
.ia-cross { stroke: var(--panel); stroke-width: 1.8; stroke-linecap: round; fill: none; }
.ia-cut { stroke: var(--bad); stroke-width: 1.6; stroke-dasharray: 3 3; fill: none; }
.ia-brace { stroke: var(--muted); stroke-width: 2; fill: none; opacity: .5; stroke-linecap: round; }
.ia-wash { fill: var(--accent-12); }
.ia-ok-wash { fill: var(--good-14); }
.ia-good-line { stroke: var(--good); stroke-width: 2; fill: none; stroke-linecap: round; }
/* Arrowheads are drawn as paths - a would need an id, and /guides renders
every scene's worth of markup through the same template. */
.ia-arrow { stroke: var(--muted); stroke-width: 2; fill: none; opacity: .6;
stroke-linecap: round; stroke-linejoin: round; }
.ia-wash-2 { fill: var(--accent-08); }
.ia-object { stroke: var(--accent); stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.ia-object-fill { stroke: var(--accent); stroke-width: 3; fill: var(--accent-08); stroke-linecap: round; stroke-linejoin: round; }
.ia-shine { stroke: var(--panel); stroke-width: 3; fill: none; stroke-linecap: round; opacity: .8; }
.ia-pulse { stroke: var(--bad); stroke-width: 2.4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
/* Kept on phones too: at ~350px wide the scene is only ~165px tall, which is a
reasonable hero and still leaves the measured figures near the top. */
footer { margin-top: 60px; padding-top: 22px; border-top: 1px solid var(--border);
color: var(--muted); font-size: 13px; text-align: center; }
/* inline-block + 3px is what makes each link a 24px-tall target. At 18px the links
wrap close enough on a phone that two of them failed WCAG 2.5.8's spacing test. */
footer a { color: var(--muted); margin: 0 8px; display: inline-block; padding: 3px 0; }