/* GP Velocity site styles.
   Layout concept: a pit-wall timing screen. Hard diagonals at the logo's slant, the logo's
   speed ribbons as the only ornament, condensed timing-board headlines, mono numerals for data.
   Colours are sampled from the GP Velocity and GPiQ logo files (see docs/DESIGN.md). */

@font-face { font-family: "Big Shoulders"; src: url("../fonts/bigshoulders-bold.woff") format("woff"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("../fonts/instrumentsans-regular.woff") format("woff"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("../fonts/instrumentsans-italic.woff") format("woff"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("../fonts/instrumentsans-bold.woff") format("woff"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/jetbrainsmono-regular.woff") format("woff"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/jetbrainsmono-bold.woff") format("woff"); font-weight: 700; font-style: normal; font-display: swap; }

/* ---------- Tokens. Dark is the default; light redefines the same names. ---------- */
:root {
  color-scheme: dark;
  --bg: #0b0d11;            /* carbon, from the dark logo plate */
  --surface: #12151b;
  --raised: #1b1f27;
  --line: #2b313c;
  --fg: #eef1f5;            /* brushed silver of the "GP" letters */
  --muted: #a4abb8;
  --accent: #e61d25;        /* "VELOCITY" red */
  --accent-ink: #ffffff;
  --accent-text: #ff5d61;   /* the same red, lifted for small text on carbon */
  --second: #6ac5d8;        /* ribbon teal */
  --rib-a: #ec8d35;         /* ribbon: orange, red, teal */
  --rib-b: #e61d25;
  --rib-c: #6ac5d8;
  --logo-on-dark: block;
  --logo-on-light: none;
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.8);

  /* Fixed in both themes: a screen is dark whatever the room looks like. */
  --screen-bg: #06080b;
  --screen-panel: #0d1015;
  --screen-line: #232a35;
  --screen-fg: #edf0f4;
  --screen-muted: #8e97a6;
  --trace: #19d3ea;         /* GPiQ cyan */
  --s-purple: #b866ff;
  --s-green: #2fd67b;
  --s-yellow: #f6c945;

  --display: "Big Shoulders", "Arial Narrow", "Roboto Condensed", Impact, sans-serif;
  --body: "Instrument Sans", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --slant: -11deg;
  --gutter: clamp(16px, 4vw, 40px);
  --step: clamp(3.5rem, 8vw, 7rem);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f3f4f7; --surface: #ffffff; --raised: #e9ecf1; --line: #d3d8e0;
    --fg: #14171c; --muted: #525a68;
    --accent: #114793; --accent-ink: #ffffff; --accent-text: #114793; --second: #c8303d;
    --rib-a: #a9b1be; --rib-b: #114793; --rib-c: #c8303d;
    --logo-on-dark: none; --logo-on-light: block;
    --shadow: 0 24px 60px -28px rgba(17, 40, 80, 0.45);
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f4f7; --surface: #ffffff; --raised: #e9ecf1; --line: #d3d8e0;
  --fg: #14171c; --muted: #525a68;
  --accent: #114793; --accent-ink: #ffffff; --accent-text: #114793; --second: #c8303d;
  --rib-a: #a9b1be; --rib-b: #114793; --rib-c: #c8303d;
  --logo-on-dark: none; --logo-on-light: block;
  --shadow: 0 24px 60px -28px rgba(17, 40, 80, 0.45);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 400 1.0625rem/1.6 var(--body);
  overflow-x: hidden;
}
main { overflow-x: clip; }   /* slanted headlines lean a few pixels past their box */
img, svg, canvas { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--accent-text); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--second); outline-offset: 3px; }
h1, h2, h3, h4 { margin: 0; text-wrap: balance; }
p, ul, ol, dl, dd, figure { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }

.display {
  font-family: var(--display); font-weight: 700; text-transform: uppercase;
  line-height: 0.9; letter-spacing: 0.005em;
  transform: skewX(var(--slant)); transform-origin: left bottom;
}
h1.display { font-size: clamp(3.25rem, 9.5vw, 7.25rem); }
h2.display { font-size: clamp(2.4rem, 5.6vw, 4.25rem); }
h3 { font: 700 1.6rem/1.1 var(--display); text-transform: uppercase; letter-spacing: 0.02em; }
.display em, h3 em { font-style: normal; color: var(--accent-text); }
.lede { font-size: clamp(1.1rem, 1.6vw, 1.3rem); color: var(--muted); max-width: 34em; }
.eyebrow {
  font: 400 0.78rem/1.4 var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); display: flex; align-items: center; gap: 0.75em;
}
.eyebrow::before { content: ""; width: 28px; height: 3px; background: var(--accent); transform: skewX(-30deg); flex: none; }
.prose { max-width: 66ch; display: grid; gap: 1.1em; }
.prose h2 { font: 700 1.9rem/1.05 var(--display); text-transform: uppercase; letter-spacing: 0.02em; margin-top: 0.9em; }
.prose ul { padding-left: 1.2em; display: grid; gap: 0.4em; }
.prose li::marker { color: var(--accent-text); }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }

.wrap { width: 100%; max-width: 1240px; margin-inline: auto; padding-inline: var(--gutter); }
.stack { display: grid; gap: 1.25rem; justify-items: start; }
.stack > * { min-width: 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 50; background: var(--accent); color: var(--accent-ink); padding: 10px 16px; font-weight: 700; }
.skip:focus { top: 12px; }

/* Buttons are parallelograms cut at the logo's slant. */
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 1.6rem;
  font: 700 1.15rem/1 var(--display); letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
  background: var(--accent); color: var(--accent-ink); border: 2px solid var(--accent);
  transform: skewX(var(--slant)); transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
  cursor: pointer;
}
.btn > span { display: inline-block; transform: skewX(11deg); }
.btn:hover { transform: skewX(var(--slant)) translateX(4px); }
.btn-line { background: transparent; color: var(--fg); border-color: var(--line); }
.btn-line:hover { border-color: var(--fg); }
.btn-small { min-height: 40px; padding: 0 1.1rem; font-size: 1rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.9rem 1.1rem; padding-left: 6px; }

.todo {
  background: transparent; color: var(--fg); padding: 0.05em 0.4em; font: 400 0.82em/1.5 var(--mono);
  border: 1px dashed var(--second); white-space: normal;
}
.todo::before { content: "To supply: "; color: var(--second); }
.draft { font: 400 0.72rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--second); border: 1px solid currentColor; padding: 0.35em 0.6em; }

/* ---------- Review ribbon (preview builds only) ---------- */
.preview-ribbon {
  display: flex; flex-wrap: wrap; gap: 0.3em 1em; align-items: baseline; justify-content: center;
  padding: 8px var(--gutter); font: 400 0.78rem/1.4 var(--mono); background: var(--raised); color: var(--fg);
  border-bottom: 1px solid var(--line);
}
.preview-ribbon strong { text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent-text); }
.preview-ribbon.is-staged strong { color: var(--second); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; gap: 1.5rem; min-height: 72px; }
.brand { flex: none; display: block; padding-block: 10px; }
.logo { width: auto; height: 44px; }
.logo-on-dark { display: var(--logo-on-dark); }
.logo-on-light { display: var(--logo-on-light); }
.site-nav { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; }
.site-nav ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.6rem; list-style: none; margin: 0; padding: 0; }
.site-nav a:not(.btn) {
  display: block; padding: 0.5rem 0; color: var(--fg); text-decoration: none;
  font: 700 1.15rem/1 var(--display); letter-spacing: 0.09em; text-transform: uppercase;
  background: linear-gradient(var(--accent), var(--accent)) left bottom / 0 3px no-repeat;
  transition: background-size 0.2s ease;
}
.site-nav a:not(.btn):hover, .site-nav a[aria-current="page"] { background-size: 100% 3px; }
.nav-tools { display: flex; align-items: center; gap: 1rem; }
.theme-toggle {
  display: inline-flex; align-items: center; gap: 0.5rem; min-height: 40px; padding: 0 0.6rem;
  background: none; border: 1px solid var(--line); color: var(--fg); cursor: pointer;
  font: 400 0.75rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
}
.theme-toggle:hover { border-color: var(--fg); }
.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.ribbons { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; pointer-events: none; }
.rib-a { stop-color: var(--rib-a); } .rib-b { stop-color: var(--rib-b); } .rib-c { stop-color: var(--rib-c); }
.rib-d { stop-color: var(--rib-c); stop-opacity: 0; }
.hero-grid {
  position: relative; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(2rem, 4vw, 4rem); align-items: center; padding-block: clamp(2.5rem, 6vw, 5rem) clamp(4.5rem, 10vw, 8.5rem);
}
.hero-copy { display: grid; gap: 1.5rem; justify-items: start; }

.page-head { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.page-head .wrap { position: relative; padding-block: clamp(2.5rem, 6vw, 4.5rem); display: grid; gap: 1.25rem; justify-items: start; }
.page-head .ribbons { opacity: 0.4; left: auto; right: 0; width: 72%; -webkit-mask-image: linear-gradient(90deg, transparent, #000 30%); mask-image: linear-gradient(90deg, transparent, #000 30%); }

/* ---------- The timing screen ---------- */
.screen {
  background: var(--screen-bg); color: var(--screen-fg); border: 1px solid var(--screen-line);
  box-shadow: var(--shadow); display: grid; min-width: 0;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}
.screen-bar {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.25rem 1rem; padding: 0.7rem 1.6rem 0.7rem 1rem;
  border-bottom: 1px solid var(--screen-line); font: 400 0.72rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--screen-muted);
}
.screen-title b { color: var(--screen-fg); }
.screen-body { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); border-bottom: 1px solid var(--screen-line); }
.circuit { width: 100%; height: auto; padding: 0.75rem; }
.circuit-kerb { fill: none; stroke: var(--screen-line); stroke-width: 11; stroke-linejoin: round; }
.circuit-line { fill: none; stroke: var(--screen-fg); stroke-width: 2.5; stroke-linejoin: round; }
.circuit-dot { fill: var(--trace); stroke: var(--screen-bg); stroke-width: 2; }
.circuit-marks line { stroke: var(--screen-muted); stroke-width: 2; }
.circuit-marks text { fill: var(--screen-muted); font: 400 10px var(--mono); letter-spacing: 0.08em; }
.timing { display: grid; align-content: stretch; border-left: 1px solid var(--screen-line); font-family: var(--mono); font-variant-numeric: tabular-nums; }
.timing > * { padding: 0.65rem 1rem; }
.timing .k { display: block; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--screen-muted); }
.timing .v { font-weight: 700; font-size: clamp(1.15rem, 2vw, 1.6rem); line-height: 1.2; }
.timing small { font-weight: 400; font-size: 0.7rem; color: var(--screen-muted); margin-left: 0.4em; }
.sectors { border-block: 1px solid var(--screen-line); display: grid; gap: 0.3rem; }
.sector { display: flex; justify-content: space-between; align-items: baseline; gap: 0.5rem; font-size: 0.95rem; }
.sector dt { color: var(--screen-muted); font-size: 0.75rem; }
.sector dd { font-weight: 700; padding: 0.1rem 0.45rem; }
.sector.is-purple dd { background: var(--s-purple); color: #14061f; }
.sector.is-green dd { background: var(--s-green); color: #03190d; }
.sector.is-yellow dd { background: var(--s-yellow); color: #1d1600; }
.trace { width: 100%; height: auto; aspect-ratio: 900 / 260; }
.screen-key {
  display: flex; flex-wrap: wrap; gap: 0.3rem 1.2rem; padding: 0.7rem 1rem 0.8rem 1.9rem; border-top: 1px solid var(--screen-line);
  font: 400 0.7rem/1.4 var(--mono); color: var(--screen-muted);
}
.key::before { content: ""; display: inline-block; width: 0.7em; height: 0.7em; margin-right: 0.5em; background: currentColor; }
.key.is-purple::before { background: var(--s-purple); } .key.is-green::before { background: var(--s-green); } .key.is-yellow::before { background: var(--s-yellow); }

/* ---------- Sections ---------- */
.section { padding-block: var(--step); }
section[id] { scroll-margin-top: 72px; }   /* keeps in-page links clear of the fixed header */
.section-head { display: grid; gap: 1rem; justify-items: start; margin-bottom: clamp(2rem, 4vw, 3.25rem); }

.pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.pillar { padding: 1.75rem 1.75rem 0 0; display: grid; gap: 0.6rem; align-content: start; }
.pillar + .pillar { padding-left: 1.75rem; border-left: 1px solid var(--line); }
.pillar p { color: var(--muted); }

/* The plate: GPiQ's own dark surface, the same in both themes. */
.plate {
  --fg: #eef1f5; --muted: #a4abb8; --line: #2b313c; --accent: #e61d25; --accent-text: #ff5d61; --second: #6ac5d8; --surface: #12151b;
  background: #07090c; color: var(--fg); position: relative;
  clip-path: polygon(0 0, 100% clamp(18px, 3.2vw, 46px), 100% 100%, 0 calc(100% - clamp(18px, 3.2vw, 46px)));
  padding-block: calc(var(--step) + 1rem);
}
.plate-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.plate-logo { width: 100%; height: auto; -webkit-mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); }
.edition-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); width: 100%; }
.edition-strip > div { padding: 0.9rem 1rem; display: grid; gap: 0.15rem; }
.edition-strip > div + div { border-left: 1px solid var(--line); }
.nc { text-transform: none; }   /* keeps the lowercase i in GPiQ inside capitalised headings and buttons */
.edition-strip small, .edition-name small { display: block; font: 400 0.72rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: none; color: var(--muted); }
.edition-name small { transform: skewX(11deg); margin-bottom: 0.35rem; }
.edition-strip b { font: 700 1.5rem/1 var(--display); text-transform: uppercase; letter-spacing: 0.04em; }
.edition-strip span { font-size: 0.85rem; color: var(--muted); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.split + .split { margin-top: var(--step); }
.split.flip > :first-child { order: 2; }
.split-copy { display: grid; gap: 1.1rem; justify-items: start; }
.split-copy p { color: var(--muted); max-width: 34em; }
.portrait { position: relative; max-width: 440px; width: 100%; }
.portrait img { width: 100%; clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 34px 100%, 0 calc(100% - 34px)); }
.portrait::after { content: ""; position: absolute; left: -14px; bottom: 24px; width: 46%; height: 8px; background: var(--accent); transform: skewX(-30deg); }

.checks { display: grid; gap: 0.6rem; }
.checks li { position: relative; padding-left: 1.7rem; }
.checks li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 14px; height: 4px; background: var(--accent); transform: skewX(-30deg); }

.cta-band { border-block: 1px solid var(--line); background: var(--surface); position: relative; overflow: hidden; }
.cta-band .wrap { position: relative; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem 3rem; padding-block: clamp(2.5rem, 5vw, 4rem); }
.cta-band .ribbons { opacity: 0.3; }

/* ---------- Solutions ---------- */
.bars { display: grid; gap: 0.9rem; background: var(--screen-bg); color: var(--screen-fg); border: 1px solid var(--screen-line); padding: 1.4rem; font: 400 0.8rem/1.3 var(--mono); font-variant-numeric: tabular-nums; box-shadow: var(--shadow); }
.bars-title { color: var(--screen-muted); letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.72rem; }
.bar-row { display: grid; grid-template-columns: 2.2em minmax(0, 1fr) 5.5em; gap: 0.8rem; align-items: center; }
.bar-row .track { height: 16px; background: var(--screen-panel); position: relative; }
.bar-row .fill { position: absolute; inset: 0 auto 0 0; transform-origin: left; transform: skewX(-20deg); }
.bar-row.is-purple .fill { background: var(--s-purple); width: 91%; }
.bar-row.is-green .fill { background: var(--s-green); width: 96%; }
.bar-row.is-yellow .fill { background: var(--s-yellow); width: 100%; }
.bar-row .val { text-align: right; font-weight: 700; }
.compare { background: var(--screen-bg); border: 1px solid var(--screen-line); box-shadow: var(--shadow); color: var(--screen-muted); font: 400 0.72rem/1.4 var(--mono); min-width: 0; }
.compare canvas { width: 100%; height: auto; aspect-ratio: 900 / 420; }
.compare figcaption { display: flex; flex-wrap: wrap; gap: 0.3rem 1.2rem; padding: 0.7rem 1rem; border-top: 1px solid var(--screen-line); }
.swatch::before { content: ""; display: inline-block; width: 1.4em; height: 3px; margin-right: 0.5em; vertical-align: middle; background: currentColor; }
.swatch.is-a { color: var(--trace); } .swatch.is-b { color: #ec8d35; } .swatch.is-d { color: var(--screen-fg); }
.circuit-source { position: absolute; width: 0; height: 0; overflow: hidden; }
.principles { display: grid; gap: 0; border: 1px solid var(--line); background: var(--surface); }
.principles li { padding: 1.1rem 1.25rem; display: grid; gap: 0.2rem; }
.principles li + li { border-top: 1px solid var(--line); }
.principles b { font: 700 1.25rem/1.1 var(--display); text-transform: uppercase; letter-spacing: 0.04em; }
.principles span { color: var(--muted); font-size: 0.95rem; }

.editions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; align-items: stretch; }
.edition {
  background: linear-gradient(135deg, transparent 18px, var(--surface) 18px); padding: 2rem 1.6rem 1.6rem;
  display: grid; gap: 1rem; align-content: start; grid-template-rows: auto auto auto 1fr auto;
}
.edition.is-featured { background: linear-gradient(135deg, transparent 18px, var(--raised) 18px); box-shadow: inset 0 -4px 0 var(--accent); }
.edition-name { font: 700 2.6rem/0.9 var(--display); text-transform: uppercase; transform: skewX(var(--slant)); transform-origin: left bottom; }
.edition-for { color: var(--muted); }
.edition-price { font: 700 1.1rem/1.2 var(--mono); }
.edition-price small { display: block; font-weight: 400; font-size: 0.75rem; color: var(--muted); }
.edition .checks { font-size: 0.97rem; }
.table-scroll { overflow-x: auto; margin-top: 2.5rem; position: relative; }
.matrix { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 0.97rem; }
.matrix th, .matrix td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--line); text-align: center; }
.matrix th:first-child, .matrix td:first-child { text-align: left; }
.matrix thead th { font: 700 1.3rem/1 var(--display); text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 2px solid var(--fg); }
.matrix .yes { display: inline-block; width: 16px; height: 5px; background: var(--accent); transform: skewX(-30deg); }
.matrix .no { color: var(--muted); }

.faq { display: grid; gap: 0; border-top: 1px solid var(--line); max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 1.1rem 2.5rem 1.1rem 0; font-weight: 700; font-size: 1.1rem; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0.4rem; top: 0.85rem; font: 700 1.6rem/1 var(--display); color: var(--accent-text); }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { padding: 0 0 1.25rem; color: var(--muted); max-width: 62ch; }

/* ---------- Blog ---------- */
.posts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.post-row { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(1.25rem, 4vw, 3rem); padding-block: 2rem; border-bottom: 1px solid var(--line); align-items: center; }
.cover {
  aspect-ratio: 16 / 9; background: var(--screen-bg); color: var(--screen-fg); position: relative; overflow: hidden; display: grid; place-items: end start;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%); text-decoration: none; max-width: 100%;
}
.cover .ribbons { opacity: 0.9; }
.cover b { position: relative; font: 700 clamp(2.4rem, 6vw, 4.4rem)/0.85 var(--display); text-transform: uppercase; padding: 0 0 0.9rem 1.1rem; transform: skewX(var(--slant)); transform-origin: left bottom; }
.post-meta { font: 400 0.75rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.2rem 1rem; }
.post-meta .cat { color: var(--accent-text); }
.post-copy { display: grid; gap: 0.8rem; justify-items: start; }
.post-copy h2, .post-copy h3 { font: 700 clamp(1.7rem, 3vw, 2.3rem)/1 var(--display); text-transform: uppercase; letter-spacing: 0.01em; }
.post-copy h2 a, .post-copy h3 a { color: var(--fg); text-decoration: none; }
.post-copy h2 a:hover, .post-copy h3 a:hover { color: var(--accent-text); }
.post-copy p { color: var(--muted); }
.more { font: 700 1.05rem/1 var(--display); letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; }
.more::after { content: " \2192"; }
.post-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.post-card { display: grid; gap: 1rem; align-content: start; }
.article { padding-block: clamp(2.5rem, 5vw, 4rem) var(--step); display: grid; gap: 2rem; }
.article .cover { max-width: 860px; width: 100%; aspect-ratio: 16 / 5; }
.article h1 { font: 700 clamp(2.4rem, 6vw, 4.2rem)/0.95 var(--display); text-transform: uppercase; max-width: 16em; }

/* ---------- Slots, contact, legal ---------- */
.slots { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.slot { border: 1px dashed var(--line); padding: 1.6rem; display: grid; gap: 0.8rem; align-content: start; min-height: 12rem; }
.slot .mark { font: 700 4rem/0.6 var(--display); color: var(--accent-text); }
.slot p { color: var(--muted); }
.logo-slots { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; }
.logo-slots li { border: 1px dashed var(--line); aspect-ratio: 5 / 2; display: grid; place-items: center; font: 400 0.72rem/1.3 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); text-align: center; padding: 0.5rem; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.contact-card { background: linear-gradient(135deg, transparent 18px, var(--surface) 18px); padding: 2rem 1.75rem; display: grid; gap: 1rem; justify-items: start; }
.address { font: 700 clamp(1.05rem, 2.4vw, 1.5rem)/1.3 var(--mono); overflow-wrap: anywhere; user-select: all; }
.copy-status { font: 400 0.8rem/1.4 var(--mono); color: var(--muted); min-height: 1.4em; }
.notice { border: 1px dashed var(--second); padding: 0.9rem 1.1rem; font-size: 0.95rem; max-width: 66ch; }
.notice b { color: var(--second); font: 400 0.75rem/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; display: block; margin-bottom: 0.4rem; }
.lost { min-height: 50vh; display: grid; align-content: center; gap: 1.5rem; justify-items: start; padding-block: var(--step); }
.lost .code { font: 700 clamp(6rem, 22vw, 14rem)/0.8 var(--display); color: transparent; -webkit-text-stroke: 2px var(--line); transform: skewX(var(--slant)); transform-origin: left bottom; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); margin-top: 0; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem 4rem; padding-block: 3rem 2rem; }
.footer-brand { display: grid; gap: 0.9rem; max-width: 24rem; }
.footer-brand .logo { height: 52px; }
.footer-brand p { color: var(--muted); font-size: 0.95rem; }
.footer-nav ul { display: flex; flex-wrap: wrap; gap: 0.6rem 1.8rem; list-style: none; margin: 0; padding: 0; }
.footer-nav a { color: var(--fg); text-decoration: none; font: 700 1.05rem/1.6 var(--display); letter-spacing: 0.09em; text-transform: uppercase; }
.footer-nav a:hover { color: var(--accent-text); }
.footer-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; padding-block: 1.25rem 2rem; border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--muted); }
.footer-legal ul { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; }
.footer-legal a { color: var(--muted); }
.footer-legal a:hover { color: var(--fg); }

/* ---------- Motion: one moment, the ribbons drawing in. ---------- */
@media (prefers-reduced-motion: no-preference) {
  .hero .ribbons path { stroke-dasharray: 2400; animation: draw 1.6s cubic-bezier(0.2, 0.7, 0.1, 1) both; }
  .hero .ribbons path:nth-child(2) { animation-delay: 0.06s; } .hero .ribbons path:nth-child(3) { animation-delay: 0.12s; }
  .hero .ribbons path:nth-child(4) { animation-delay: 0.18s; } .hero .ribbons path:nth-child(5) { animation-delay: 0.24s; }
  .hero .ribbons path:nth-child(6) { animation-delay: 0.3s; }
  @keyframes draw { from { stroke-dashoffset: 2400; } to { stroke-dashoffset: 0; } }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }

/* ---------- Narrow screens ---------- */
@media (max-width: 960px) {
  .hero-grid, .plate-grid, .split, .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .hero .ribbons { opacity: 0.28; }
  .split.flip > :first-child { order: 0; }
  .editions, .slots, .post-cards { grid-template-columns: minmax(0, 1fr); }
  .logo-slots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pillars { grid-template-columns: minmax(0, 1fr); }
  .pillar, .pillar + .pillar { padding: 1.5rem 0 0; border-left: 0; }
  .pillar + .pillar { border-top: 1px solid var(--line); margin-top: 1.5rem; }
  .post-row { grid-template-columns: minmax(0, 1fr); }

  .js .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; margin-left: auto;
    background: none; border: 1px solid var(--line); color: var(--fg); cursor: pointer;
  }
  .nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after { display: block; width: 22px; height: 3px; background: currentColor; transform: skewX(-30deg); }
  .nav-toggle-bars { position: relative; }
  .nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-bars::before { top: -7px; } .nav-toggle-bars::after { top: 7px; }
  .header-row { flex-wrap: wrap; gap: 0 1rem; }
  .site-nav { flex-basis: 100%; margin-left: 0; flex-direction: column; align-items: stretch; gap: 1rem; padding-bottom: 1.25rem; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a:not(.btn) { padding: 0.9rem 0; border-bottom: 1px solid var(--line); font-size: 1.4rem; }
  .js .site-nav { display: none; }
  .js .site-nav.is-open { display: flex; }
  .nav-tools { justify-content: space-between; }
}
@media (max-width: 560px) {
  .logo { height: 36px; }
  .screen-body { grid-template-columns: minmax(0, 1fr); }
  .timing { border-left: 0; border-top: 1px solid var(--screen-line); grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sectors { grid-column: 1 / -1; grid-row: 2; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.6rem; border-bottom: 0; }
  .sector { flex-direction: column; align-items: flex-start; gap: 0.15rem; }
  .edition-strip { grid-template-columns: minmax(0, 1fr); }
  .edition-strip > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .btn { width: 100%; }
  .btn-row { width: 100%; padding-inline: 6px; }
  .nav-tools .btn { width: auto; }
}

/* ---------- Speed Lab: trail braking calculator ----------
   Inputs sit on the page surface and follow the theme. Results are a data screen,
   dark in both themes like every other screen on the site. */
.sl-section { padding-top: clamp(2.5rem, 5vw, 4rem); }
.sl-tight { padding-top: 0; }
.sl-grid { display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr); gap: clamp(1.25rem, 3vw, 2rem); align-items: start; }

.sl-panel { background: linear-gradient(135deg, transparent 18px, var(--surface) 18px); padding: 1.75rem 1.5rem; display: grid; gap: 0.25rem; box-shadow: var(--shadow); }
.sl-panel .eyebrow { margin-bottom: 0.6rem; }
.sl-panel .sl-gap { margin-top: 0.8rem; }
.sl-presets { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.1rem; }
.sl-chip {
  font: 700 0.95rem/1 var(--display); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
  background: transparent; border: 1px solid var(--line); padding: 0.5rem 0.8rem; cursor: pointer;
  transform: skewX(var(--slant)); transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.sl-chip:hover { color: var(--fg); border-color: var(--fg); }
.sl-chip.is-on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.sl-ctrl { margin-bottom: 1.15rem; }
.sl-ctrl-top { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; }
.sl-ctrl label, .sl-spec-grid label { font-weight: 700; font-size: 0.95rem; }
.sl-ctrl output { font: 700 0.95rem/1.2 var(--mono); font-variant-numeric: tabular-nums; }
.sl-hint, .sl-err { display: block; font-size: 0.82rem; color: var(--muted); margin-top: 0.35rem; }
.sl-err { color: var(--accent-text); font-weight: 700; }
.sl-err:empty { display: none; }
.sl-num { display: inline-flex; align-items: center; gap: 0.45rem; }
.sl-num em { font: 400 0.8rem/1 var(--mono); font-style: normal; color: var(--muted); min-width: 1.4em; }
.sl-num input, .sl-spec-grid input {
  font: 700 0.95rem/1.2 var(--mono); font-variant-numeric: tabular-nums; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); padding: 0.45rem 0.6rem; border-radius: 0;
}
.sl-num input { width: 6.2em; text-align: right; }
.sl-num input:focus, .sl-spec-grid input:focus { outline: 2px solid var(--second); outline-offset: 1px; border-color: var(--fg); }
.sl-num input.is-bad, .sl-spec-grid input.is-bad { border-color: var(--accent-text); }
.sl-panel input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 4px; background: var(--line); margin: 0.5rem 0; accent-color: var(--accent); cursor: pointer; }
.sl-panel input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 14px; height: 22px; background: var(--accent); border: 0; transform: skewX(var(--slant)); }
.sl-panel input[type="range"]::-moz-range-thumb { width: 14px; height: 22px; background: var(--accent); border: 0; border-radius: 0; }
.sl-panel input[type="range"]::-moz-range-track { height: 4px; background: var(--line); }
.sl-calc { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.2rem; margin: 0.3rem 0 1.2rem; padding-left: 6px; }
.sl-calc .btn { min-width: 11rem; }
.sl-calc-status { font: 400 0.8rem/1.4 var(--mono); color: var(--muted); min-height: 1.4em; }
.sl-screen.is-fresh .sl-vmax, .sl-screen.is-fresh .sl-metrics dd:not(.sl-s) { animation: sl-flash 1.2s ease-out; }
@keyframes sl-flash { 0% { background-color: rgba(25, 211, 234, 0.22); } 100% { background-color: transparent; } }
@media (prefers-reduced-motion: reduce) { .sl-screen.is-fresh .sl-vmax, .sl-screen.is-fresh .sl-metrics dd:not(.sl-s) { animation: none; } }
.sl-specs { border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 0.4rem; }
.sl-specs summary { cursor: pointer; list-style: none; position: relative; font: 700 1.25rem/1.1 var(--display); letter-spacing: 0.04em; text-transform: uppercase; padding-right: 2rem; }
.sl-specs summary::-webkit-details-marker { display: none; }
.sl-specs summary::after { content: "+"; position: absolute; right: 0.2rem; top: -0.1rem; font: 700 1.6rem/1 var(--display); color: var(--accent-text); }
.sl-specs[open] summary::after { content: "\2212"; }
.sl-spec-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.8rem; margin: 1rem 0 1.2rem; }
.sl-spec-grid label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.25rem; }
.sl-spec-grid input { width: 100%; }
.sl-specs .btn { margin-left: 6px; }

.sl-screen { align-content: start; }
.sl-vmax { padding: 1.2rem 1.4rem; border-bottom: 1px solid var(--screen-line); border-left: 4px solid var(--trace); display: grid; gap: 0.4rem; }
.sl-vmax-line { font-size: clamp(1rem, 1.6vw, 1.15rem); line-height: 1.5; }
.sl-vmax-line b { font: 700 clamp(1.35rem, 2.6vw, 1.75rem)/1 var(--mono); color: var(--trace); font-variant-numeric: tabular-nums; white-space: nowrap; }
.sl-vmax-sub { font-size: 0.85rem; color: var(--screen-muted); }
.sl-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; border-bottom: 1px solid var(--screen-line); font-family: var(--mono); font-variant-numeric: tabular-nums; }
.sl-metrics > div { padding: 0.8rem 1rem; border-right: 1px solid var(--screen-line); border-top: 1px solid var(--screen-line); min-width: 0; }
.sl-metrics > div:nth-child(3n) { border-right: 0; }
.sl-metrics > div:nth-child(-n+3) { border-top: 0; }
.sl-metrics dt { font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--screen-muted); }
.sl-metrics dd { margin: 0; font-weight: 700; font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.25; }
.sl-metrics dd.sl-s { font-weight: 400; font-size: 0.72rem; color: var(--screen-muted); line-height: 1.4; }
.sl-metrics .is-hero dd:not(.sl-s) { color: var(--trace); }
.sl-alert { padding: 0.65rem 1.4rem; font: 700 0.82rem/1.4 var(--mono); letter-spacing: 0.04em; border-bottom: 1px solid var(--screen-line); min-height: 2.6rem; }
.sl-alert.is-ok { color: var(--s-green); }
.sl-alert.is-warn { color: var(--s-yellow); }
.sl-alert.is-danger { color: #ff5d61; }
.sl-charts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sl-charts figure { padding: 0.9rem 1rem 1rem; min-width: 0; }
.sl-charts figure + figure { border-left: 1px solid var(--screen-line); }
.sl-chart-title { font: 400 0.7rem/1.4 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--screen-muted); margin-bottom: 0.4rem; }
.sl-charts svg { width: 100%; height: auto; }
.sl-charts svg text { font-family: var(--mono); }
.sl-legend { display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; font: 400 0.7rem/1.4 var(--mono); color: var(--screen-muted); margin-top: 0.5rem; }
.sl-sw-corner::before { background: var(--trace); } .sl-sw-brake::before { background: #e61d25; }
.sl-sw-combo::before { background: var(--screen-fg); height: 1px; } .sl-sw-curve::before { background: var(--trace); }
.sl-sw-limit::before { background: var(--s-yellow); }

.sl-table-scroll { margin-top: 0; }
.sl-table { width: 100%; min-width: 560px; border-collapse: collapse; font: 400 0.9rem/1.3 var(--mono); font-variant-numeric: tabular-nums; }
.sl-table th, .sl-table td { padding: 0.7rem 1rem; border-bottom: 1px solid var(--screen-line); text-align: right; }
.sl-table th:first-child, .sl-table td:first-child { text-align: left; }
.sl-table th { font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--screen-muted); font-weight: 400; }
.sl-table tr:last-child td { border-bottom: 0; }
.sl-table tr.is-current td { color: var(--trace); font-weight: 700; }
.sl-table .sl-slides { color: #ff5d61; }
.sl-bar { display: inline-block; height: 6px; width: 60px; margin-left: 0.6rem; background: var(--screen-panel); vertical-align: middle; position: relative; }
.sl-bar i { position: absolute; inset: 0 auto 0 0; background: var(--trace); transform: skewX(-20deg); transform-origin: left; }

.sl-math { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.sl-card { background: linear-gradient(135deg, transparent 18px, var(--surface) 18px); padding: 1.6rem 1.5rem; display: grid; gap: 0.6rem; align-content: start; }
.sl-card p:not(.sl-eq) { color: var(--muted); font-size: 0.97rem; }
.sl-eq { font: 400 0.98rem/1.4 var(--mono); background: var(--bg); border-left: 3px solid var(--accent); padding: 0.6rem 0.9rem; overflow-x: auto; white-space: nowrap; }
.sl-notice { margin-top: 2rem; }

@media (max-width: 960px) {
  .sl-grid, .sl-math { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .sl-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sl-metrics > div { border-top: 1px solid var(--screen-line); border-right: 1px solid var(--screen-line); }
  .sl-metrics > div:nth-child(-n+2) { border-top: 0; }
  .sl-metrics > div:nth-child(2n) { border-right: 0; }
  .sl-metrics > div:nth-child(3n):not(:nth-child(2n)) { border-right: 1px solid var(--screen-line); }
  .sl-charts { grid-template-columns: minmax(0, 1fr); }
  .sl-charts figure + figure { border-left: 0; border-top: 1px solid var(--screen-line); }
  .sl-spec-grid { grid-template-columns: minmax(0, 1fr); }
}