@font-face { font-family: "Barlow"; src: url("/fonts/barlow-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Barlow"; src: url("/fonts/barlow-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Barlow"; src: url("/fonts/barlow-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Semi Condensed"; src: url("/fonts/barlow-semi-condensed-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Semi Condensed"; src: url("/fonts/barlow-semi-condensed-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #eef2f5;
  --ink: #0f1720;
  --muted: #5a6875;
  --line: #e1e7ed;
  --link: #0b63c4;
  --dash-1: #0a131c;
  --dash-2: #142636;
  --dash-ink: #eef4f8;
  --dash-muted: #93a7b8;
  --dash-line: rgb(255 255 255 / 0.1);
  --lamp: #ffb020;
  --caution: #c26a06;
  --focus: #0b63c4;

  --sans: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Barlow Semi Condensed", "Barlow", system-ui, sans-serif;

  --r-lg: 18px;
  --r-md: 12px;
  --r-sm: 8px;
  --shadow: 0 1px 2px rgb(15 23 32 / 0.04), 0 8px 24px rgb(15 23 32 / 0.05);
  --header-h: 64px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1016;
    --surface: #121a22;
    --surface-2: #18232d;
    --ink: #e6edf3;
    --muted: #93a4b3;
    --line: #213040;
    --link: #6cb0ff;
    --dash-1: #060b10;
    --dash-2: #0f1d29;
    --caution: #f5a524;
    --focus: #6cb0ff;
    --shadow: none;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--sans);
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.18em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.1; letter-spacing: -0.005em; margin: 0; }
p, ul, ol { margin: 0 0 1rem; }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 1.25rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.code { font-family: var(--display); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: 0.03em; }

/* Header */

.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--dash-1) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--dash-line);
  color: var(--dash-ink);
}
.site-header .wrap { display: flex; align-items: center; gap: 1.25rem; min-height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--dash-ink); font: 700 1.2rem/1 var(--display); letter-spacing: 0.01em; }
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; color: var(--lamp); filter: drop-shadow(0 0 6px rgb(255 176 32 / 0.55)); }
.site-nav { display: flex; gap: 1rem; margin-left: auto; }
.site-nav a { color: var(--dash-muted); font-weight: 500; }
.site-nav a:hover { color: var(--dash-ink); text-decoration: none; }
.site-header .search { flex: 0 1 300px; }

/* Search */

.search { position: relative; }
.search-field { position: relative; display: flex; align-items: center; }
.search-field svg { position: absolute; left: 0.8rem; width: 18px; height: 18px; color: var(--dash-muted); pointer-events: none; }
.search input {
  width: 100%;
  font: 500 1rem/1.2 var(--sans);
  padding: 0.65rem 2.6rem 0.65rem 2.4rem;
  color: var(--dash-ink);
  background: rgb(255 255 255 / 0.07);
  border: 1px solid var(--dash-line);
  border-radius: 999px;
  transition: background-color 0.15s, border-color 0.15s;
}
.search input::placeholder { color: var(--dash-muted); }
.search input:focus { outline: none; background: rgb(255 255 255 / 0.12); border-color: color-mix(in srgb, var(--lamp) 70%, transparent); box-shadow: 0 0 0 3px rgb(255 176 32 / 0.18); }
.search input::-webkit-search-cancel-button { display: none; }
.search kbd {
  position: absolute; right: 0.7rem;
  font: 600 0.75rem/1 var(--sans); color: var(--dash-muted);
  border: 1px solid var(--dash-line); border-radius: 6px; padding: 0.25rem 0.45rem;
}
.search input:focus ~ kbd, .search input:not(:placeholder-shown) ~ kbd { display: none; }

.results {
  position: absolute; z-index: 40; left: 0; right: 0; top: calc(100% + 0.5rem);
  margin: 0; padding: 0.4rem; list-style: none;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--r-md);
  box-shadow: 0 18px 48px rgb(5 12 20 / 0.28);
  max-height: 24rem; overflow-y: auto;
  min-width: 18rem;
}
.results[hidden] { display: none; }
.results a { display: flex; gap: 0.8rem; align-items: baseline; padding: 0.55rem 0.7rem; color: var(--ink); border-radius: var(--r-sm); line-height: 1.35; }
.results a:hover { text-decoration: none; }
.results a .code { color: var(--link); flex: none; min-width: 3.6rem; font-size: 1.05rem; }
.results a[aria-selected="true"], .results a:hover { background: var(--surface-2); }
.results .empty { padding: 0.7rem; color: var(--muted); }

/* Dashboard band: the signature element */

.dash {
  color: var(--dash-ink);
  background:
    radial-gradient(60rem 26rem at 12% -10%, rgb(255 176 32 / 0.13), transparent 60%),
    linear-gradient(180deg, var(--dash-1), var(--dash-2));
  border-bottom: 1px solid var(--dash-line);
  position: relative;
}
.dash::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--dash-line) 1px, transparent 1px), linear-gradient(90deg, var(--dash-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgb(0 0 0 / 0.5), transparent 75%);
  opacity: 0.35;
}
.dash .wrap { position: relative; }
.dash a { color: var(--dash-ink); }

.crumbs { font-size: 0.9rem; color: var(--dash-muted); padding-top: 1.25rem; }
.crumbs a { color: var(--dash-muted); }
.crumbs a:hover { color: var(--dash-ink); }
.crumbs span[aria-hidden] { margin: 0 0.4rem; opacity: 0.6; }

.lamp { width: 40px; height: 40px; color: var(--lamp); filter: drop-shadow(0 0 10px rgb(255 176 32 / 0.65)); flex: none; }
.dash-label { display: flex; align-items: center; gap: 0.75rem; color: var(--dash-muted); font-weight: 500; }

.readout { padding-block: 0 2rem; }
.readout .dash-label { margin-top: 1.75rem; }
.readout h1 { margin-top: 0.9rem; }
.readout h1 .code {
  display: block;
  font-size: clamp(4rem, 15vw, 7.5rem);
  line-height: 0.9;
  color: var(--lamp);
  text-shadow: 0 0 32px rgb(255 176 32 / 0.35);
  letter-spacing: 0.04em;
}
.readout h1 .title { display: block; font-size: clamp(1.5rem, 3.6vw, 2.1rem); line-height: 1.15; font-weight: 600; margin-top: 0.75rem; max-width: 26ch; }

.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.75rem; margin: 1.75rem 0 0; }
.facts div {
  background: rgb(255 255 255 / 0.05);
  border: 1px solid var(--dash-line);
  border-radius: var(--r-md);
  padding: 0.85rem 1rem;
}
.facts dt { font-size: 0.85rem; color: var(--dash-muted); }
.facts dd { margin: 0.2rem 0 0; font: 600 1.3rem/1.2 var(--display); }

.pill { display: inline-flex; align-items: center; gap: 0.45rem; }
.pill::before { content: ""; width: 0.6rem; height: 0.6rem; border-radius: 50%; background: currentColor; box-shadow: 0 0 10px currentColor; flex: none; }
.pill.stop { color: #ff6b6b; }
.pill.caution { color: var(--lamp); }
.pill.low { color: #4ade80; }

/* Page layout with sticky rail */

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 3rem; padding-top: 2rem; padding-bottom: 4rem; align-items: start; }
.rail { position: sticky; top: calc(var(--header-h) + 1.5rem); display: grid; gap: 1.25rem; }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1rem 0.5rem 1rem 1rem; box-shadow: var(--shadow); }
.toc h2 { font-size: 1rem; color: var(--muted); font-weight: 600; margin: 0 0 0.5rem; }
.toc ol { list-style: none; padding: 0; margin: 0; }
.toc a { display: block; padding: 0.35rem 0.75rem; margin-left: -0.75rem; border-left: 2px solid transparent; color: var(--muted); font-weight: 500; }
.toc a:hover { color: var(--ink); text-decoration: none; }
.toc a[aria-current="true"] { color: var(--ink); border-left-color: var(--lamp); }

/* Content sections */

.section { margin-bottom: 2.5rem; }
.section > h2 { font-size: 1.75rem; margin-bottom: 1rem; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.25rem 1.5rem; box-shadow: var(--shadow); }

.lede { font-size: 1.3rem; line-height: 1.5; margin: 0; max-width: 60ch; }
.tech { margin-top: 1rem; color: var(--muted); }
.tech summary { cursor: pointer; color: var(--link); font-weight: 500; width: fit-content; }
.tech p { margin: 0.75rem 0 0; max-width: 66ch; }

.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; }
.checks li { display: flex; gap: 0.75rem; align-items: flex-start; }
.checks svg { flex: none; width: 22px; height: 22px; margin-top: 0.1rem; color: var(--caution); }

.causes { list-style: none; padding: 0; margin: 0; }
.causes li { display: grid; grid-template-columns: 1fr 8.5rem; gap: 1.25rem; align-items: center; padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
.causes li:first-child { padding-top: 0; }
.causes li:last-child { border-bottom: 0; padding-bottom: 0; }
.likely { display: grid; gap: 0.35rem; font-size: 0.85rem; color: var(--muted); text-align: right; }
.likely .bar { height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.likely .bar span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--lamp), var(--caution)); }
.likely[data-level="high"] .bar span { width: 100%; }
.likely[data-level="medium"] .bar span { width: 62%; }
.likely[data-level="low"] .bar span { width: 28%; }

.steps { list-style: none; padding: 0; margin: 0; counter-reset: step; }
.steps li { position: relative; padding: 0 0 1.4rem 3.25rem; counter-increment: step; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: -0.1rem;
  width: 2.1rem; height: 2.1rem; border-radius: 50%;
  display: grid; place-items: center;
  font: 700 1.05rem/1 var(--display);
  background: var(--dash-2); color: var(--lamp);
}
.steps li::after { content: ""; position: absolute; left: calc(1.05rem - 1px); top: 2.2rem; bottom: 0.3rem; width: 2px; background: var(--line); }
.steps li:last-child { padding-bottom: 0; }
.steps li:last-child::after { display: none; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 0.7rem 0.75rem 0.7rem 0; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
th { font-weight: 600; color: var(--muted); font-size: 0.85rem; }
td.vehicle { font-weight: 600; }
.num { text-align: right; }
td.share { width: 30%; padding-right: 1rem; }
td.share span { display: block; height: 8px; border-radius: 99px; background: var(--link); opacity: 0.8; }
.note { color: var(--muted); font-size: 0.95rem; margin: 0.9rem 0 0; max-width: 70ch; }

.anatomy { display: flex; gap: 1.5rem; flex-wrap: wrap; align-items: center; }
.anatomy-chars { display: flex; gap: 0.4rem; }
.anatomy-chars span {
  font: 700 2.4rem/1 var(--display);
  background: linear-gradient(180deg, var(--dash-1), var(--dash-2)); color: var(--lamp);
  padding: 0.6rem 0.75rem 0.5rem; border-radius: var(--r-sm); min-width: 2.6rem; text-align: center;
  text-shadow: 0 0 14px rgb(255 176 32 / 0.4);
}
.anatomy dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 1rem; flex: 1 1 18rem; }
.anatomy dt { font: 700 1.05rem/1.5 var(--display); }
.anatomy dd { margin: 0; color: var(--muted); }

.faq { padding: 0.25rem 1.5rem; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: 0; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 0; font-weight: 600; font-size: 1.1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 500 1.5rem/1 var(--sans); color: var(--muted); transition: transform 0.2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 1.1rem; color: var(--muted); max-width: 64ch; }

.chips { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: 0.6rem; }
.chips a, .chips .unlinked {
  display: flex; gap: 0.75rem; align-items: baseline; height: 100%;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 0.75rem 0.9rem; color: var(--ink); line-height: 1.3;
  transition: border-color 0.15s;
}
.chips a:hover { text-decoration: none; border-color: var(--link); }
.chips .code { color: var(--link); flex: none; font-size: 1.1rem; }
.chips .unlinked { color: var(--muted); border-style: dashed; }
.chips .unlinked .code { color: var(--muted); }

.disclaimer { color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); padding-top: 1.25rem; }

/* Ad slots (rendered only in local preview until an ad network is configured) */

.ad { display: grid; place-items: center; min-height: 250px; margin: 0 0 2.5rem; border: 1px dashed var(--line); border-radius: var(--r-md); color: var(--muted); font-size: 0.85rem; }
.rail .ad { min-height: 600px; margin: 0; }

/* Home */

.hero { padding-block: 3.5rem 3rem; }
.hero .dash-label { margin-bottom: 1.25rem; }
.hero h1 { font-size: clamp(2.6rem, 7vw, 4.5rem); line-height: 1; max-width: 14ch; }
.hero p.sub { color: var(--dash-muted); font-size: 1.25rem; max-width: 42ch; margin: 1rem 0 2rem; }
.hero .search { max-width: 640px; }
.hero .search input { font-size: 1.35rem; padding: 1.05rem 3rem 1rem 3.2rem; }
.hero .search-field svg { left: 1.15rem; width: 22px; height: 22px; }
.hero .search kbd { display: none; }
.quick { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 1.1rem; color: var(--dash-muted); font-size: 0.95rem; }
.quick button {
  font: 600 0.95rem/1 var(--sans); color: var(--dash-ink);
  background: rgb(255 255 255 / 0.06); border: 1px solid var(--dash-line); border-radius: 999px;
  padding: 0.45rem 0.85rem; cursor: pointer;
}
.quick button:hover { background: rgb(255 255 255 / 0.12); }

.home-grid { display: grid; gap: 3rem; padding-block: 2.5rem 4rem; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.section-head h2 { font-size: 1.9rem; }
.section-head p { margin: 0; color: var(--muted); }

.tiles { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 0.75rem; }
.tiles a {
  display: grid; gap: 0.35rem; align-content: start; height: 100%;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 1rem 1.1rem 1.1rem; color: var(--ink); box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.15s;
}
.tiles a:hover { text-decoration: none; border-color: var(--link); transform: translateY(-2px); }
.tiles .code { font-size: 1.6rem; color: var(--ink); }
.tiles .t { color: var(--muted); line-height: 1.35; }

.systems { list-style: none; padding: 0.5rem 1.5rem; margin: 0; columns: 2 20rem; column-gap: 2.5rem; }
.systems li { break-inside: avoid; border-bottom: 1px solid var(--line); }
.systems a { display: flex; justify-content: space-between; gap: 1rem; padding: 0.75rem 0; color: var(--ink); font-weight: 500; }
.systems .n { color: var(--muted); font-variant-numeric: tabular-nums; font-weight: 400; }

/* Catalog */

.catalog-head { padding-block: 0 2rem; }
.catalog-head h1 { font-size: clamp(2.4rem, 6vw, 3.5rem); margin-top: 1rem; }
.catalog-head p { color: var(--dash-muted); margin: 0.75rem 0 1.25rem; }
.jump { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0; margin: 0; list-style: none; }
.jump a { display: inline-block; font: 600 0.95rem/1 var(--display); padding: 0.45rem 0.7rem; border: 1px solid var(--dash-line); border-radius: 999px; background: rgb(255 255 255 / 0.05); }
.jump a:hover { text-decoration: none; background: rgb(255 255 255 / 0.12); }
.catalog { padding-block: 2rem 4rem; }
.catalog .section > h2 { font-size: 1.4rem; display: flex; gap: 0.6rem; align-items: baseline; }
.catalog .section > h2 .n { color: var(--muted); font-weight: 600; font-size: 1rem; }

/* Footer */

.site-footer { background: var(--dash-1); color: var(--dash-muted); font-size: 0.95rem; border-top: 1px solid var(--dash-line); }
.footer-main { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 2.5rem; padding-block: 2.75rem 2.25rem; }
.footer-brand .brand { margin-bottom: 0.75rem; }
.footer-brand p { margin: 0; max-width: 38ch; line-height: 1.5; }
.footer-nav { display: grid; gap: 0.55rem; align-content: start; }
.footer-nav h2 { font: 600 0.95rem/1.2 var(--sans); color: var(--dash-ink); margin: 0 0 0.25rem; }
.footer-nav a { color: var(--dash-muted); width: fit-content; }
.footer-nav a:hover { color: var(--dash-ink); }
.footer-fine { display: grid; gap: 0.35rem; padding-block: 1.25rem 2rem; border-top: 1px solid var(--dash-line); font-size: 0.85rem; }
.footer-fine p { margin: 0; }
.footer-fine a { color: var(--dash-muted); text-decoration: underline; text-underline-offset: 0.18em; }
.footer-fine a:hover { color: var(--dash-ink); }

/* Responsive */

@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rail { display: none; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .footer-main { grid-template-columns: 1fr 1fr; gap: 2rem 1.5rem; }
  .footer-brand { grid-column: 1 / -1; }
  :root { --header-h: 0px; }
  .site-header { position: static; }
  .site-header .wrap { flex-wrap: wrap; gap: 0.6rem 1rem; padding-block: 0.7rem; }
  .site-header .search { flex: 1 0 100%; order: 3; }
  .search kbd { display: none; }
  .panel { padding: 1rem 1.1rem; border-radius: var(--r-md); }
  .faq { padding: 0.1rem 1.1rem; }
  .facts dd { font-size: 1.1rem; }
  .causes li { grid-template-columns: 1fr; gap: 0.5rem; }
  .likely { text-align: left; grid-template-columns: 6rem 1fr; align-items: center; }
  th.share, td.share { display: none; }
  .lede { font-size: 1.15rem; }
}

@media (prefers-reduced-motion: no-preference) {
  .readout .lamp, .hero .lamp { animation: lamp-on 1.1s ease-out 1 both; }
  @keyframes lamp-on {
    0%, 25% { opacity: 0.12; filter: none; }
    35% { opacity: 1; }
    45% { opacity: 0.35; }
    60%, 100% { opacity: 1; }
  }
}
.site-header .results { left: auto; width: min(28rem, calc(100vw - 2.5rem)); }

/* Text pages (About, Privacy) */

.page-head { padding-block: 0 2.25rem; }
.page-head h1 { font-size: clamp(2.4rem, 6vw, 3.5rem); margin-top: 1rem; }
.page-head p { color: var(--dash-muted); font-size: 1.2rem; margin: 0.75rem 0 0; max-width: 52ch; }
.page-body { padding-block: 2rem 4rem; }
.wrap.narrow { max-width: calc(48rem + 2.5rem); }
.prose { padding: 1.75rem 2rem; }
.prose h2 { font-size: 1.6rem; margin: 2.25rem 0 0.75rem; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose ul { max-width: 68ch; }
.prose ul { padding-left: 1.25rem; }
.prose li { margin-bottom: 0.4rem; }
.prose a { text-decoration: underline; text-underline-offset: 0.18em; }
.prose mark { background: #fde68a; color: #0f1720; padding: 0 0.25rem; border-radius: 4px; }
.prose .meta { color: var(--muted); font-size: 0.95rem; }
@media (max-width: 640px) { .prose { padding: 1.25rem 1.1rem; } }
.review-note { margin: 1rem 0 0; font-size: 0.92rem; color: var(--muted); }
.section-intro { margin: -0.25rem 0 1rem; }
.chips small { display: block; color: var(--muted); font-size: 0.85rem; margin-top: 0.2rem; }

/* 404 page: the search sits on a light panel, not the dark band */
.prose .search { margin: 0.5rem 0 1.25rem; }
.prose .search input { color: var(--ink); background: var(--surface-2); border-color: var(--line); }
.prose .search input::placeholder { color: var(--muted); }
.prose .search-field svg { color: var(--muted); }