/* shelffighters.com — built from the Shelf Fighters design system (Hi-Vis).
   Dark is the default; light follows prefers-color-scheme. No JavaScript anywhere. */

/* ---------- Fonts (self-hosted, SIL OFL; licences beside the files) ---------- */
@font-face { font-family: "D-DIN Condensed"; font-weight: 700; font-style: normal; font-display: swap; src: url("/assets/fonts/D-DINCondensed-Bold.woff2") format("woff2"); }
@font-face { font-family: "D-DIN Condensed"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/D-DINCondensed.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 700; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-style: normal; font-display: swap; src: url("/assets/fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }

/* ---------- Tokens: Hi-Vis · Dark (default) ---------- */
:root {
  color-scheme: dark light;
  --bg: #0b0b0e;
  --bg-raised: #16161b;
  --bg-glow: #1e1e25;
  --line: #2c2c33;
  --line-strong: #6b6b77;
  --ink: #ffffff;
  --ink-muted: #a8a8b3;
  --laser: #ff3b5c;
  --laser-ink: #ff6b84;
  --on-laser: #0b0b0e;
  --focus: #ffffff;
  --bar: var(--ink);
  --canary: #ffc53d;
  --on-canary: #0b0b0e;
  --laser-bloom: 0 0 6px rgba(255, 59, 92, 0.9), 0 0 18px rgba(255, 59, 92, 0.55), 0 0 40px rgba(255, 59, 92, 0.3);

  --font-display: "D-DIN Condensed", "Arial Narrow", sans-serif;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-6: 24px;
  --space-8: 32px; --space-12: 48px; --space-16: 64px; --space-24: 96px;
  --radius-none: 0px; --radius-sm: 3px; --radius-md: 6px;
  --measure: 46rem;
}

/* ---------- Tokens: Hi-Vis · Light ---------- */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-raised: #f3f3f5;
    --bg-glow: #e9e9ed;
    --line: #dcdce1;
    --line-strong: #83838e;
    --ink: #0b0b0e;
    --ink-muted: #52525c;
    --laser: #e02447;
    --laser-ink: #c2163a;
    --on-laser: #ffffff;
    --focus: #0b0b0e;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-sans); font-size: 17px; line-height: 28px; }
img, svg { display: block; max-width: 100%; }
a { color: var(--laser-ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, .sf-btn:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
strong, b { font-weight: 600; }
code { font-family: var(--font-mono); font-size: 15px; line-height: 24px; background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1px 6px; overflow-wrap: anywhere; }
.skip { position: absolute; left: var(--space-4); top: -100px; background: var(--ink); color: var(--bg); padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm); z-index: 10; }
.skip:focus { top: var(--space-4); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 var(--space-12); }
.prose { max-width: var(--measure); }

/* ---------- Site header ---------- */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--ink); text-decoration: none; font-family: var(--font-display); font-weight: 700; font-size: 22px; line-height: 1; letter-spacing: 0.04em; text-transform: uppercase; }
.brand:hover { text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 var(--space-2); }

/* ---------- Barcode mark (geometry from the 512px app icon) ---------- */
.sf-mark { position: relative; display: inline-block; height: 176px; padding: 0 28px; line-height: 0; flex: none; }
.sf-mark svg { height: 100%; width: auto; }
.sf-mark rect { fill: var(--bar); }
.sf-mark__laser { position: absolute; left: 0; right: 0; top: 50%; height: 3px; margin-top: -1px; background: var(--laser); box-shadow: var(--laser-bloom); }
.sf-mark--xs { height: 28px; padding: 0; }
.sf-mark--sm { height: 40px; padding: 0; }

/* ---------- Badge ---------- */
.sf-badge { display: inline-block; font-family: var(--font-display); font-weight: 700; font-size: 15px; line-height: 20px; letter-spacing: 0.16em; text-transform: uppercase; padding: var(--space-1) var(--space-3); border-radius: var(--radius-sm); background: var(--canary); color: var(--on-canary); }

/* ---------- Buttons ---------- */
.sf-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-height: 44px; padding: var(--space-3) var(--space-6); border: 0; border-radius: var(--radius-sm); font-family: var(--font-display); font-weight: 700; font-size: 17px; line-height: 20px; letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none; cursor: pointer; }
.sf-btn:hover { text-decoration: none; }
.sf-btn--primary { background: var(--laser); color: var(--on-laser); }
.sf-btn--primary:hover { box-shadow: var(--laser-bloom); }
.sf-btn--secondary { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line-strong); }
.sf-btn--secondary:hover { box-shadow: inset 0 0 0 2px var(--ink); }
.sf-btn--tertiary { background: transparent; color: var(--ink-muted); padding-left: var(--space-3); padding-right: var(--space-3); }
.sf-btn--tertiary:hover, .sf-btn--tertiary[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 2px; }

/* ---------- Hero ---------- */
.sf-hero { background: radial-gradient(ellipse 60% 70% at 78% 50%, var(--bg-glow), var(--bg) 70%); border-bottom: 1px solid var(--line); }
.sf-hero .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--space-12); padding-top: var(--space-24); padding-bottom: var(--space-24); }
.sf-hero__copy { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-4); max-width: 640px; }
.sf-hero__title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 96px; line-height: 0.92; letter-spacing: 0.01em; text-transform: uppercase; }
.sf-hero__tagline { margin: var(--space-4) 0 0; font-size: 24px; line-height: 34px; color: var(--ink-muted); }
.sf-hero__tagline strong { color: var(--ink); }
.sf-hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-4); }

/* ---------- Sections ---------- */
.section { padding: var(--space-24) 0; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 var(--space-3); font-family: var(--font-mono); font-weight: 500; font-size: 14px; line-height: 20px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--laser-ink); }
.h-xl { margin: 0 0 var(--space-6); font-family: var(--font-display); font-weight: 700; font-size: 64px; line-height: 0.95; letter-spacing: 0.01em; text-transform: uppercase; }
.lead { font-size: 24px; line-height: 34px; margin: 0 0 var(--space-6); }
.muted { color: var(--ink-muted); }
.rule-card { margin: var(--space-8) 0 0; padding: var(--space-8); background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); }
.rule-card p { margin: 0; }
.rule-card p + p { margin-top: var(--space-4); color: var(--ink-muted); }
.rule-card .rule { font-size: 24px; line-height: 34px; }
.rule-card .rule strong { color: var(--laser-ink); }

/* ---------- Mode cards ---------- */
.modes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-8); margin: var(--space-8) 0 0; padding: 0; list-style: none; }
.sf-mode { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-6); background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); }
.sf-mode__stat { font-family: var(--font-mono); font-weight: 500; font-size: 14px; line-height: 20px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--laser-ink); }
.sf-mode__title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 28px; line-height: 1.05; letter-spacing: 0.02em; text-transform: uppercase; }
.sf-mode__body { margin: 0; color: var(--ink-muted); }

/* ---------- Status line ---------- */
.status { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-4); margin: var(--space-12) 0 0; color: var(--ink-muted); }
.status p { margin: 0; }

/* ---------- Contact ---------- */
.contacts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4) var(--space-8); margin: var(--space-8) 0 0; padding: 0; }
.contacts div { padding: var(--space-6); background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); }
.contacts dt { font-family: var(--font-display); font-weight: 700; font-size: 22px; line-height: 1.1; letter-spacing: 0.02em; text-transform: uppercase; }
.contacts dd { margin: var(--space-2) 0 0; color: var(--ink-muted); }
.contacts dd.addr { margin-top: var(--space-3); font-family: var(--font-mono); font-weight: 500; font-size: 15px; line-height: 22px; }

/* ---------- Legal / document pages ---------- */
.doc { padding: var(--space-16) 0 var(--space-24); }
.doc h1 { margin: var(--space-4) 0 var(--space-3); font-family: var(--font-display); font-weight: 700; font-size: 56px; line-height: 0.95; letter-spacing: 0.01em; text-transform: uppercase; }
.doc .sub { margin: 0 0 var(--space-8); color: var(--ink-muted); }
.doc h2 { margin: var(--space-12) 0 var(--space-3); padding-top: var(--space-6); border-top: 1px solid var(--line); font-family: var(--font-display); font-weight: 700; font-size: 32px; line-height: 1.05; letter-spacing: 0.02em; text-transform: uppercase; }
.doc h3 { margin: var(--space-8) 0 var(--space-2); font-family: var(--font-sans); font-weight: 600; font-size: 19px; line-height: 28px; }
.doc p { margin: 0 0 var(--space-4); }
.doc ul { margin: 0 0 var(--space-4); padding-left: var(--space-6); }
.doc li { margin: var(--space-2) 0; }
.doc li::marker { color: var(--laser); }
.card { margin: var(--space-6) 0; padding: var(--space-6); background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); }
.card > :last-child { margin-bottom: 0; }
.card--status { border-color: var(--canary); }
.table-scroll { margin: var(--space-4) 0 var(--space-6); overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; font-size: 16px; line-height: 26px; }
th, td { text-align: left; vertical-align: top; padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { font-family: var(--font-mono); font-weight: 500; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-muted); background: var(--bg-raised); }
td:first-child { min-width: 12rem; }
.doc-footer { margin-top: var(--space-12); padding-top: var(--space-6); border-top: 1px solid var(--line); color: var(--ink-muted); font-size: 14px; line-height: 22px; }

/* ---------- Site footer ---------- */
.site-footer { padding: var(--space-8) 0; color: var(--ink-muted); font-size: 14px; line-height: 22px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-6); }
.site-footer__id { display: flex; align-items: center; gap: var(--space-4); }
.site-footer__id p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0 var(--space-1); margin-right: calc(-1 * var(--space-3)); }

/* ---------- 404 ---------- */
.lost { padding: var(--space-24) 0; }

/* ---------- Narrow screens ---------- */
@media (max-width: 860px) {
  .modes { grid-template-columns: minmax(0, 1fr); }
  .contacts { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .wrap { padding: 0 var(--space-4); }
  .site-header .wrap { min-height: 64px; }
  .sf-hero .wrap { flex-direction: column-reverse; align-items: flex-start; gap: var(--space-8); padding-top: var(--space-16); padding-bottom: var(--space-16); }
  .sf-hero .sf-mark--hero { height: 112px; padding: 0 18px; }
  .sf-hero__title { font-size: 64px; line-height: 0.95; }
  .sf-hero__tagline, .lead, .rule-card .rule { font-size: 19px; line-height: 28px; }
  .section { padding: var(--space-16) 0; }
  .h-xl { font-size: 44px; }
  .rule-card { padding: var(--space-6); }
  .doc { padding: var(--space-12) 0 var(--space-16); }
  .doc h1 { font-size: 40px; }
  .doc h2 { font-size: 26px; }
  .site-footer__id { align-items: flex-start; }
  .brand { white-space: nowrap; font-size: 20px; }
  .site-nav { flex-wrap: nowrap; gap: 0; margin-right: calc(-1 * var(--space-3)); }
  .site-nav .sf-btn { padding-left: var(--space-2); padding-right: var(--space-2); letter-spacing: 0.08em; }
  /* Stack the data table: each row becomes a small labelled block. */
  .table-scroll { overflow-x: visible; }
  .table-scroll tr:first-child { display: none; }
  .table-scroll tr, .table-scroll td { display: block; }
  .table-scroll tr { padding: var(--space-4); border-bottom: 1px solid var(--line); }
  .table-scroll tr:last-child { border-bottom: 0; }
  .table-scroll td { padding: 0; border-bottom: 0; min-width: 0; }
  .table-scroll td + td { margin-top: var(--space-1); }
}
@media (prefers-reduced-motion: no-preference) {
  .sf-btn, a { transition: box-shadow 120ms ease, color 120ms ease; }
}
.sf-btn--addr { font-family: var(--font-mono); font-weight: 500; font-size: 14px; letter-spacing: 0.02em; text-transform: none; }