/* FlashBan website, "dithering" look. Static: no animations or transitions anywhere.
   All dither is low contrast (close tones), because fine high-contrast patterns can trigger
   pattern sensitivity. Text never sits on a dither. System fonts only: the site loads nothing
   from other servers (see the CSP in each page). */
:root {
  color-scheme: light dark;
  --paper: #f3f1ea;
  --panel: #ebe8df;
  --ink: #111111;
  --muted: #45443f; /* 9.4:1 on paper */
  --rule: #111111;
  --soft: #c9c5b8;
  --accent: #4a5726; /* 7.6:1 on paper */
  --accent-ink: #f3f1ea;
  --focus: #4a5726;
  --warn: #ffd84d;
  --grain: repeating-conic-gradient(#d6d3c7 0 25%, #c8c4b6 0 50%) 0 0 / 4px 4px;
  --grain-accent: repeating-conic-gradient(#b7bd9c 0 25%, #a7ae8a 0 50%) 0 0 / 4px 4px;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #161614;
    --panel: #1d1d1a;
    --ink: #e4e1d6; /* 14:1 */
    --muted: #b9b6aa; /* 8.6:1 */
    --rule: #e4e1d6;
    --soft: #44433d;
    --accent: #b5c48a; /* 10:1 */
    --accent-ink: #161614;
    --focus: #ffd84d;
    --grain: repeating-conic-gradient(#2c2c28 0 25%, #24241f 0 50%) 0 0 / 4px 4px;
    --grain-accent: repeating-conic-gradient(#5e6844 0 25%, #4f583a 0 50%) 0 0 / 4px 4px;
  }
}
* { box-sizing: border-box; transition: none !important; animation: none !important; }
html { background: var(--paper); }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); }
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: var(--ink); text-decoration-thickness: 1.5px; text-underline-offset: 4px; }
a:not(.btn):hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
code, kbd, samp { font: 0.875em/1.4 var(--mono); }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 28px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 1; }
.skip:focus { left: 8px; }

/* header */
.top { border-bottom: 1.5px solid var(--rule); }
.top .wrap { display: flex; align-items: center; gap: 28px; min-height: 72px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 21px; letter-spacing: -0.01em; text-decoration: none; }
.brand .mark { width: 22px; height: 22px; border: 1.5px solid var(--rule); background: var(--grain-accent); }
.top nav { display: flex; gap: 22px; flex-wrap: wrap; }
.top nav a { text-decoration: none; font-size: 16px; padding: 4px 0; border-bottom: 2px solid transparent; }
.top nav a[aria-current="page"] { border-bottom-color: var(--ink); font-weight: 600; }
.top .get { margin-left: auto; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 10px 22px; background: var(--ink); color: var(--paper); border: 1.5px solid var(--ink); font: 600 17px var(--sans); text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--panel); color: var(--ink); border-color: var(--ink); }
.btn.small { min-height: 36px; padding: 6px 14px; font-size: 15px; }

/* type */
h1 { font-size: clamp(40px, 6vw, 72px); line-height: 1; letter-spacing: -0.035em; font-weight: 800; margin: 0; text-wrap: balance; }
h1 em, h2 em { font-style: normal; color: var(--accent); }
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.08; letter-spacing: -0.025em; font-weight: 800; margin: 0 0 16px; text-wrap: balance; }
h3 { font-size: 20px; line-height: 1.25; margin: 0 0 6px; }
.label { font: 600 13px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: 20px; color: var(--muted); max-width: 46ch; margin: 18px 0 0; }
p { max-width: 68ch; }
.muted { color: var(--muted); }

/* sections */
section { padding: 64px 0; border-bottom: 1px solid var(--soft); }
section:last-of-type { border-bottom: 0; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.fine { font-size: 14px; color: var(--muted); margin-top: 16px; }

/* dithered figures (canvases drawn by site.js) */
.plate { margin: 0; border: 1.5px solid var(--rule); background: var(--grain); }
.plate canvas { display: block; width: 100%; height: auto; image-rendering: pixelated; }
.plate figcaption { border-top: 1.5px solid var(--rule); padding: 8px 12px; font: 13px/1.5 var(--mono); color: var(--muted); background: var(--paper); }

/* ruled lists instead of cards */
.rows { list-style: none; padding: 0; margin: 0; border-top: 1.5px solid var(--rule); }
.rows > li { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--soft); }
.rows > li > :first-child { font-weight: 700; }
.rows > li p { margin: 0; color: var(--muted); }
.split { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 48px; align-items: start; }

/* steps */
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps > li { counter-increment: s; display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--soft); }
.steps > li::before { content: counter(s); width: 40px; height: 40px; border: 1.5px solid var(--rule); display: grid; place-items: center; font: 700 17px var(--mono); background: var(--paper); }
.steps > li p { margin: 4px 0 0; color: var(--muted); }

/* tables */
.table { overflow-x: auto; border: 1.5px solid var(--rule); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--soft); }
thead th { font: 600 12px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border-bottom: 1.5px solid var(--rule); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
td.num, .num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.status { font: 600 12px/1.6 var(--mono); padding: 1px 6px; border: 1px solid var(--ink); white-space: nowrap; }
.status.tested { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* download box */
.dl { border: 1.5px solid var(--rule); display: grid; grid-template-columns: 180px minmax(0, 1fr); }
.dl .swatch { border-right: 1.5px solid var(--rule); background: var(--grain-accent); }
.dl .body { padding: 22px 24px; }
.dl dl { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 6px 16px; margin: 18px 0 0; font-size: 15px; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; overflow-wrap: anywhere; }
.hash { font: 14px/1.5 var(--mono); }
.notice { border: 1.5px solid var(--rule); background: var(--panel); padding: 14px 16px; margin: 0; }
.notice.warn { border-color: var(--ink); background: var(--warn); color: #111; }
.notice.warn a { color: #111; }
pre { margin: 8px 0 0; padding: 12px 14px; border: 1.5px solid var(--rule); background: var(--panel); overflow-x: auto; font: 14px/1.5 var(--mono); }
.copy { margin-left: 8px; }

/* footer */
footer { border-top: 1.5px solid var(--rule); padding: 28px 0 40px; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; gap: 24px; justify-content: space-between; flex-wrap: wrap; }
footer p { margin: 0; max-width: 60ch; }

@media (max-width: 860px) {
  .hero, .split { grid-template-columns: 1fr; }
  .rows > li { grid-template-columns: 1fr; gap: 4px; }
  .dl { grid-template-columns: 1fr; }
  .dl .swatch { height: 56px; border-right: 0; border-bottom: 1.5px solid var(--rule); }
  .dl dl { grid-template-columns: 1fr; }
  section { padding: 44px 0; }
  .top .get { display: none; }
}
@media (forced-colors: active) {
  .brand .mark, .plate, .dl .swatch { forced-color-adjust: auto; background: Canvas; }
  .status.tested { border: 1px solid CanvasText; }
}
@media print {
  .top nav, .actions, .copy { display: none; }
}
caption.label { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--soft); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ------------------------------------------------------------------
   Grain / homepage language (David, Sun 4:30 AM): the same display face,
   mono body, boxed uppercase nav and FLASHBAN wordmark as index.html and
   demo/showcase, so every page reads as one site. Dark only, like those pages.
   Fonts are local files (site/fonts, licence in fonts/LICENSE.md); nothing is
   loaded from other servers. Static: no motion. */
@font-face { font-family: "Sofia Sans Extra Condensed"; font-weight: 900; font-display: swap; src: url("fonts/sofia-sans-extra-condensed-900.woff2") format("woff2"); }
@font-face { font-family: "Martian Mono"; font-weight: 100 800; font-display: swap; src: url("fonts/martian-mono.woff2") format("woff2"); }
:root, :root:not([data-theme="light"]) {
  color-scheme: dark;
  --paper: #0e0e0e; --panel: #161616; --ink: #edeae3; --muted: #a3a29c; /* 7.6:1 */
  --rule: #2a2a2a; --soft: #2a2a2a; --accent: #b5c48a; --accent-ink: #0e0e0e; --focus: #b5c48a;
  --grain: repeating-conic-gradient(#2c2c28 0 25%, #24241f 0 50%) 0 0 / 4px 4px;
  --grain-accent: repeating-conic-gradient(#5e6844 0 25%, #4f583a 0 50%) 0 0 / 4px 4px;
  --display: "Sofia Sans Extra Condensed", "Arial Narrow", sans-serif;
  --mono: "Martian Mono", ui-monospace, monospace;
  --sans: var(--mono);
}
body { font: 400 13px/1.7 var(--mono); -webkit-font-smoothing: antialiased; }
a:not(.btn):hover { color: var(--accent); }
.wrap { max-width: none; padding: 0 24px; }

/* header: wordmark cell + boxed uppercase links, as on the homepage and Grain */
.top { border-bottom: 1px solid var(--rule); }
.top .wrap { padding: 0; min-height: 64px; gap: 0; align-items: stretch; flex-wrap: nowrap; }
.brand { gap: 12px; padding: 0 24px; border-right: 1px solid var(--rule); font: 900 32px/1 var(--display); text-transform: uppercase; letter-spacing: 0; }
.brand img { width: 40px; height: 40px; display: block; image-rendering: auto; }
.brand .mark { display: none; }
.top nav { gap: 0; margin-left: auto; flex-wrap: nowrap; }
.top nav a { display: flex; align-items: center; padding: 16px 22px; border: 0; border-left: 1px solid var(--rule); font: 400 11px/1 var(--mono); letter-spacing: 0.04em; text-transform: uppercase; }
.top nav a:hover { background: var(--panel); color: var(--accent); }
.top nav a[aria-current="page"] { background: var(--ink); color: var(--paper); font-weight: 400; border-bottom: 0; }
.top .get { display: none; }

/* type: big condensed uppercase headings, mono everywhere else */
h1 { font: 900 clamp(64px, 9vw, 150px)/0.86 var(--display); letter-spacing: -0.015em; text-transform: uppercase; }
h2 { font: 900 clamp(36px, 3.4vw, 60px)/1 var(--display); letter-spacing: 0; text-transform: uppercase; margin: 0 0 22px; }
h3 { font: 900 26px/1.05 var(--display); text-transform: uppercase; letter-spacing: 0.01em; }
.lede { font-size: 13px; line-height: 1.7; max-width: 62ch; margin-top: 24px; }
p { max-width: 72ch; }
.label, caption.label { font: 400 11px/1.4 var(--mono); letter-spacing: 0.08em; }
section { padding: 48px 0; border-bottom: 1px solid var(--rule); }
.hero { gap: 56px; align-items: end; padding-top: 40px; }

/* buttons: square, mono uppercase, ink then olive on hover (Grain) */
.btn { min-height: 48px; padding: 14px 20px; font: 400 12px/1.3 var(--mono); letter-spacing: 0.03em; text-transform: uppercase; background: var(--ink); color: var(--paper); border: 1px solid var(--ink); }
.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--ink); border-color: #5a5a54; }
.btn.ghost:hover { background: var(--panel); color: var(--accent); border-color: var(--accent); }
.btn.small { min-height: 36px; padding: 8px 12px; font-size: 11px; }

/* figures, lists, steps, tables, download box */
.plate, .table, .dl, pre, .notice { border: 1px solid var(--rule); }
.plate figcaption { border-top: 1px solid var(--rule); font: 400 11px/1.6 var(--mono); }
.rows { border-top: 1px solid var(--rule); }
.rows > li { border-bottom: 1px solid var(--rule); }
.rows > li > :first-child { font: 900 24px/1.05 var(--display); text-transform: uppercase; font-weight: 900; }
.steps > li { border-bottom: 1px solid var(--rule); }
.steps > li::before { border: 1px solid var(--rule); font: 400 12px var(--mono); background: var(--panel); color: var(--accent); }
.steps > li p, .rows > li p { font-size: 12.5px; }
table { font-size: 12.5px; }
thead th { font: 400 11px/1.4 var(--mono); border-bottom: 1px solid var(--rule); }
th, td { border-bottom: 1px solid var(--rule); }
.status { font: 400 11px/1.6 var(--mono); text-transform: uppercase; letter-spacing: 0.04em; }
.notice.warn { border-color: #626d48; background: #181c13; color: #c8cdbb; }
.notice.warn a { color: var(--accent); }
.dl .swatch { border-right: 1px solid var(--rule); }

/* footer: uppercase mono line, as on Grain */
footer { border-top: 1px solid var(--rule); padding: 22px 0 30px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; }
footer a { color: var(--ink); }

@media (max-width: 860px) {
  .top .wrap { flex-wrap: wrap; }
  .brand { padding: 14px 16px; font-size: 28px; border-right: 0; }
  .top nav { width: 100%; border-top: 1px solid var(--rule); overflow-x: auto; }
  .top nav a { padding: 14px 12px; font-size: 10px; }
  .top nav a:first-child { border-left: 0; }
  .wrap { padding: 0 16px; }
  h1 { font-size: clamp(54px, 15vw, 96px); }
}
@media (forced-colors: active) {
  .top nav a[aria-current="page"] { forced-color-adjust: auto; background: Highlight; color: HighlightText; }
}