/* ==================================================================
   RunThatVIN — design tokens
   Values taken from the Claude Design export, not re-invented.
   ================================================================== */

:root {
  /* Ink */
  --ink:          #1A1A18;
  --ink-2:        #3D3A34;
  --ink-3:        #55514A;
  --muted:        #6B665C;
  --muted-2:      #7A746A;
  --faint:        #B0A99E;

  /* Surfaces */
  --ground:       #EFEBE3;
  --card:         #FFFFFF;
  --tint:         #F6F3EE;
  --band:         #3C3832;   /* warm mid-tone, deliberately not near-black */
  --footer:       #1A1A18;

  /* Borders */
  --border:       #E2DCD2;
  --border-2:     #DED8CC;
  --border-3:     #CFC8B8;

  /* Blue: fill vs link are different tokens on purpose.
     #1F6FEB is 3.90:1 on --ground, below WCAG AA for text.
     It is only ever used as a fill with white text on top. */
  --blue-fill:    #1F6FEB;
  --blue-link:    #1550C0;   /* 6.01:1 on --ground */
  --blue-ring:    #EAF1FE;

  /* Recall status. Never colour alone — each pairs with a glyph. */
  --amber:        #9A5B0E;
  --amber-bg:     #FDF3E7;
  --amber-border: #EBD9BF;
  --red:          #A81F2D;
  --red-dark:     #761822;
  --red-bg:       #F2CBD0;
  --teal:         #0E7060;
  --teal-dark:    #0B5A4D;
  --teal-bg:      #E6F2EF;

  --radius:       6px;
  --radius-sm:    4px;
  --shadow-1:     0 1px 2px rgba(26,26,24,.04);
  --shadow-2:     0 1px 2px rgba(26,26,24,.05), 0 6px 18px rgba(26,26,24,.06);
  --shadow-3:     0 1px 2px rgba(26,26,24,.05), 0 8px 22px rgba(26,26,24,.08);
  --shadow-band:  0 2px 4px rgba(0,0,0,.22), 0 14px 32px rgba(0,0,0,.26);

  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --measure: 680px;
  --wide:    1100px;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-link); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--blue-fill);
  outline-offset: 2px;
  border-radius: 2px;
}

.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 24px; }
.measure { max-width: var(--measure); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* ---------- Header ---------- */

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; gap: 24px;
}
.wordmark {
  font: 600 26px var(--sans);
  letter-spacing: -.015em;
  color: var(--ink);
}
.wordmark__vin { font-family: var(--mono); color: var(--blue-link); }

.site-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-nav a { font-size: 15px; color: var(--ink-2); }
.site-nav a[aria-current='page'] {
  color: var(--blue-link);
  border-bottom: 2px solid var(--blue-link);
}

/* ---------- Hero ---------- */

.hero { padding: 64px 0 8px; }
.kicker {
  font: 500 11px var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue-link);
  margin-bottom: 14px;
}
h1 {
  font: 600 clamp(31px, 5vw, 54px)/1.05 var(--sans);
  letter-spacing: -.03em;
  margin: 0 0 20px;
  text-wrap: pretty;
}
.lede {
  font-size: 18px;
  color: var(--ink-2);
  max-width: 620px;
  margin: 0 0 32px;
}

/* ---------- VIN input ---------- */

.vin-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-3);
  padding: 22px;
  max-width: 900px;
}
.vin-card__head {
  display: flex; justify-content: space-between; gap: 16px;
  font: 500 10px var(--mono);
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 10px;
}
.vin-field { position: relative; }
.vin-input {
  width: 100%;
  font: 400 clamp(18px, 3.2vw, 26px) var(--mono);
  letter-spacing: .06em;
  color: var(--ink);
  background: var(--tint);
  border: 1px solid var(--border-3);
  border-radius: var(--radius-sm);
  padding: 16px 84px 16px 18px;
  box-shadow: inset 0 1px 3px rgba(26,26,24,.07);
}
.vin-input::placeholder { color: var(--muted-2); }
.vin-input:focus {
  outline: none;
  border-color: var(--blue-fill);
  box-shadow: 0 0 0 3px var(--blue-ring);
}
.vin-count {
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  font: 500 13px var(--mono); color: var(--muted);
}
.vin-count[data-state='complete'] { color: var(--teal-dark); }

.vin-actions {
  display: flex; align-items: center; gap: 18px;
  flex-wrap: wrap; margin-top: 16px;
}

.btn {
  font: 600 16px var(--sans);
  border-radius: var(--radius-sm);
  padding: 13px 26px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn--primary {
  background: var(--blue-fill); color: #fff;
  box-shadow: 0 1px 2px rgba(21,80,192,.3);
}
.btn--primary:hover { background: var(--blue-link); }
.btn--primary:disabled { opacity: .5; cursor: not-allowed; }
.btn--text {
  background: none; color: var(--blue-link);
  padding: 13px 4px;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn--text:hover { text-decoration: underline; }
.icon-scan { flex: none; }

.vin-hint { font-size: 14px; color: var(--muted); margin: 12px 0 0; }

/* Validation messages. Icon + text, never colour alone. */
.vin-note {
  display: flex; gap: 10px; align-items: flex-start;
  margin-top: 14px; padding: 12px 14px;
  border-radius: var(--radius-sm); font-size: 14.5px;
}
.vin-note[hidden] { display: none; }
.vin-note--ok    { background: var(--teal-bg);  color: var(--teal-dark);  border: 1px solid #C6E0D9; }
.vin-note--warn  { background: var(--amber-bg); color: #6E410A;           border: 1px solid var(--amber-border); }
.vin-note--error { background: var(--red-bg);   color: var(--red-dark);   border: 1px solid #E4A9B1; }
.vin-note__glyph { font: 600 15px var(--mono); flex: none; line-height: 1.5; }

/* ---------- Dark band ---------- */

.band {
  background: var(--band);
  padding: 72px 0;
  margin: 72px 0;
  color: #D9D4CA;
}
.band .kicker { color: var(--faint); }
.band h2 { color: #fff; font: 600 clamp(26px,3.4vw,34px)/1.15 var(--sans); margin: 0 0 14px; letter-spacing: -.02em; }
.band p  { color: #D9D4CA; max-width: 620px; margin: 0 0 34px; }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pair > * {
  border-radius: var(--radius);
  box-shadow: var(--shadow-band);
  padding: 26px 28px;
}
.pair__spec   { background: var(--card);     border: 1px solid rgba(255,255,255,.14); }
.pair__recall { background: var(--amber-bg); border: 1px solid var(--amber-border); }
.pair h3 { font: 600 22px var(--sans); margin: 0 0 10px; color: var(--ink); }
.pair p  { font-size: 15.5px; color: var(--ink-2); margin: 0; }
.pair .kicker { color: var(--muted); }
.pair__recall .kicker { color: var(--amber); }

/* ---------- Results ---------- */

.results[hidden] { display: none; }
.identity { margin: 8px 0 24px; }
.identity__label {
  font: 500 10px var(--mono); letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.identity__name {
  font: 600 clamp(28px, 4.6vw, 46px)/1.08 var(--sans);
  letter-spacing: -.025em; margin: 0;
}
.identity__trim { color: var(--blue-link); }
.identity__vin {
  font: 500 14px var(--mono); color: var(--muted);
  letter-spacing: .08em; margin-top: 10px;
}

/* Recall block — full-bleed width, directly under identity. */
.recall {
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 32px;
  display: flex; gap: 16px; align-items: flex-start;
}
.recall__glyph { font: 600 20px var(--mono); flex: none; line-height: 1.4; }
.recall__title { font: 600 20px var(--sans); margin: 0 0 6px; }
.recall__body  { font-size: 15.5px; margin: 0; }
.recall--open  { background: var(--red-bg);   border: 1px solid #E4A9B1; color: var(--red-dark); }
.recall--clear { background: var(--teal-bg);  border: 1px solid #C6E0D9; color: var(--teal-dark); }
.recall--none  { background: var(--amber-bg); border: 1px solid var(--amber-border); color: #6E410A; }

/* Recall history — deliberately calmer than an alarm. The model has a
   recall record; that is not the same as this car being unsafe. */
.recall--history {
  background: var(--amber-bg);
  border: 1px solid var(--amber-border);
  color: #6E410A;
}
.recall__main { min-width: 0; flex: 1; }
.recall__cta { margin: 12px 0 0; font-size: 15px; }
.recall__cta a { color: var(--red-dark); font-weight: 600; }

.recall__groups { margin-top: 18px; }
.recall__group {
  border-top: 1px solid var(--amber-border);
}
.recall__group summary {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 0; cursor: pointer;
  list-style: none;
}
.recall__group summary::-webkit-details-marker { display: none; }
.recall__group summary::after {
  content: '+'; font: 600 17px var(--mono); color: var(--amber); flex: none;
}
.recall__group[open] summary::after { content: '\2212'; }
.recall__group summary:hover .recall__component { text-decoration: underline; }

.recall__component { font: 600 15px var(--sans); color: #5A360A; }
.recall__badge {
  font: 500 12px var(--mono); color: var(--amber);
  margin-left: auto; margin-right: 4px; flex: none;
}
.recall__item {
  padding: 4px 0 16px; border-left: 2px solid var(--amber-border);
  padding-left: 14px; margin-bottom: 8px;
}
.recall__campaign { font: 500 12px var(--mono); color: var(--amber); margin: 0 0 6px; }
.recall__item .recall__body { font-size: 14.5px; margin: 0 0 6px; }

.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.spec-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-1);
  padding: 22px 24px;
}
.spec-card h2 { font: 600 21px var(--sans); margin: 0 0 14px; }
.spec-row {
  display: flex; justify-content: space-between; gap: 20px;
  padding: 9px 0; border-bottom: 1px solid var(--tint);
  font-size: 15.5px;
}
.spec-row:last-child { border-bottom: none; }
.spec-row dt { color: var(--muted); margin: 0; }
.spec-row dd { margin: 0; text-align: right; font-weight: 500; }
.spec-row dd.missing { color: var(--muted-2); font-weight: 400; font-style: italic; }

/* ---------- Disclosure ---------- */

.disclosure {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-2);
  overflow: hidden; margin: 40px 0;
}
.disclosure__body { padding: 28px 30px; }
.disclosure__foot {
  background: var(--tint); border-top: 1px solid var(--border);
  padding: 20px 30px; font-size: 15px; color: var(--ink-2);
}
.disclosure h2 { font: 600 29px var(--sans); letter-spacing: -.014em; margin: 0 0 10px; }
.disclosure__why { color: var(--ink-2); margin: 0 0 22px; font-size: 16px; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.cols h3 {
  font: 500 10px var(--mono); letter-spacing: .1em;
  text-transform: uppercase; margin: 0 0 14px;
}
.cols--get h3 { color: var(--teal-dark); }
.cols--not h3 { color: var(--red-dark); }
.cols ul { list-style: none; margin: 0; padding: 0; }
.cols li { padding: 5px 0; font-size: 16px; }
.cols--not li { color: var(--ink-2); }
.cols li small {
  display: block; color: var(--muted);
  font-size: 13.5px; padding-left: 14px;
}

/* ---------- States ---------- */

.state { text-align: left; padding: 40px 0; max-width: var(--measure); }
.state h2 { font: 600 26px/1.2 var(--sans); margin: 0 0 12px; }
.state p  { color: var(--ink-2); margin: 0 0 18px; }

.skeleton { animation: pulse 1.4s ease-in-out infinite; }
.skeleton__bar {
  height: 14px; border-radius: 3px;
  background: var(--border-2); margin-bottom: 12px;
}
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .55 } }
@media (prefers-reduced-motion: reduce) {
  .skeleton { animation: none; }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--footer); color: #D9D4CA;
  padding: 56px 0 40px; margin-top: 88px;
}
.site-footer .wordmark { color: #fff; font-size: 22px; margin: 0 0 12px; }
/* Light tones only down here — the brand blue only reaches 3.76:1 on the
   footer ground and reads as a clash rather than an accent. */
.site-footer .wordmark__vin { color: #D9D4CA; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px; align-items: start;
}
.site-footer h2 {
  font: 500 10px var(--mono); letter-spacing: .12em;
  text-transform: uppercase; color: #A39D93; margin: 0 0 14px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { padding: 5px 0; }
.site-footer a { color: #D9D4CA; font-size: 15px; }
.site-footer p { font-size: 14.5px; color: #A39D93; max-width: 340px; }

/* ---------- Mobile ---------- */

@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero { padding: 36px 0 4px; }
  .site-nav { display: none; }
  .wordmark { font-size: 22px; }
  .site-header .wrap { min-height: 64px; }
  .vin-card { padding: 16px; }
  .vin-input { padding: 14px 74px 14px 14px; }
  .vin-actions { flex-direction: column; align-items: stretch; gap: 10px; }
  .btn { width: 100%; }
  .btn--text { justify-content: center; border: 1px solid var(--border-3); }
  .pair, .spec-grid, .cols, .footer-grid { grid-template-columns: 1fr; }
  .band { padding: 48px 0; margin: 48px 0; }
  .recall { flex-direction: row; padding: 18px; }
}

/* ==================================================================
   Article, reference tables, hub cards, segment breakdown
   ================================================================== */

.article { max-width: var(--measure); padding-bottom: 20px; }
.article h2 {
  font: 600 29px/1.2 var(--sans); letter-spacing: -.014em;
  margin: 44px 0 12px;
}
.article h3 { font: 600 20px var(--sans); margin: 30px 0 8px; }
.article p  { margin: 0 0 16px; color: var(--ink-2); }
.article .mono { font-family: var(--mono); font-size: .94em; }
.article .weights {
  background: var(--tint); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 16px;
  font-size: 14px; overflow-x: auto; color: var(--ink);
}
.cta { margin-top: 34px; font-weight: 600; font-size: 17px; }

/* Reference tables. Real <table> so screen readers can navigate and
   the content can be pasted into a spreadsheet. */
.data-table {
  width: 100%; border-collapse: collapse; margin: 20px 0 28px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  font-size: 15.5px;
}
.data-table caption {
  caption-side: top; text-align: left;
  font: 500 10px var(--mono); letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted);
  padding-bottom: 10px;
}
.data-table th {
  text-align: left; font: 600 13px var(--sans);
  background: var(--tint); color: var(--ink);
  padding: 11px 14px; border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 9px 14px; border-bottom: 1px solid var(--tint);
  color: var(--ink-2); vertical-align: top;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table .mono, .data-table td.mono {
  font-family: var(--mono); color: var(--ink); font-size: 14px;
}

/* Reference hub */
.ref-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px; margin: 8px 0 20px;
}
.ref-card {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-1);
  padding: 24px; text-decoration: none;
}
.ref-card:hover { box-shadow: var(--shadow-2); text-decoration: none; }
.ref-card h2 { font: 600 20px/1.25 var(--sans); margin: 0 0 8px; color: var(--ink); }
.ref-card p  { font-size: 15px; color: var(--ink-2); margin: 0; }
.ref-card .kicker { color: var(--muted); margin-bottom: 10px; }

/* Recall lookup fields */
.field-row { display: grid; grid-template-columns: 100px 1fr 1fr; gap: 12px; }
.field-label {
  display: block; font: 500 10px var(--mono);
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 6px;
}
.field {
  width: 100%; font: 400 17px var(--sans); color: var(--ink);
  background: var(--tint); border: 1px solid var(--border-3);
  border-radius: var(--radius-sm); padding: 12px 14px;
}
.field:focus {
  outline: none; border-color: var(--blue-fill);
  box-shadow: 0 0 0 3px var(--blue-ring);
}

/* Validator breakdown */
.breakdown__title { font: 600 24px var(--sans); margin: 40px 0 16px; }
.seg-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.seg {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-1); padding: 18px 20px;
}
.seg__head { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.seg__label {
  font: 500 10px var(--mono); letter-spacing: .09em;
  text-transform: uppercase; color: var(--muted);
}
.seg__pos { font: 500 11px var(--mono); color: var(--faint); flex: none; }
.seg__value {
  font: 500 22px var(--mono); letter-spacing: .05em;
  color: var(--ink); margin: 0 0 6px; word-break: break-all;
}
.seg__hint { font-size: 13.5px; color: var(--muted); margin: 0; line-height: 1.45; }

@media (max-width: 760px) {
  .article h2 { font-size: 24px; margin-top: 34px; }
  .field-row { grid-template-columns: 1fr; }
  .data-table { font-size: 14.5px; }
  .data-table th, .data-table td { padding: 9px 10px; }
}

/* ---------- Wordmark with icon ---------- */

.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.wordmark:hover { text-decoration: none; }
.wordmark__icon { display: block; flex: none; }
.wordmark__text { display: inline-block; }

/* The footer uses icon-light.svg rather than a CSS filter — invert()
   plus hue-rotate() shifts the brand blue to an unintended colour. */

@media (max-width: 760px) {
  .wordmark { gap: 8px; }
  .wordmark__icon { width: 26px; height: 26px; }
}