/* Designrail site: the same proof-sheet identity as the extension. Paper, ink, hairlines and
   one signal orange; mono for labels, IBM Plex Sans for reading. */

@font-face { font-family: 'Plex'; font-weight: 100 700; font-display: swap; src: url(/fonts/ibm-plex-sans-latin-wght-normal.woff2) format('woff2'); }
@font-face { font-family: 'Mono'; font-weight: 100 800; font-display: swap; src: url(/fonts/jetbrains-mono-latin-wght-normal.woff2) format('woff2'); }

:root {
  --paper: #f4f1ea;
  --paper-raised: #fbfaf6;
  --paper-sunk: #ebe6da;
  --ink: #17140f;
  --ink-muted: #5e574b;
  --rule: #d9d2c3;
  --signal: #ff4f12;
  --signal-ink: #b83a0b;
  --on-signal: #17140f;
  --sans: 'Plex', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Mono', ui-monospace, 'Cascadia Code', Menlo, Consolas, monospace;
  --radius: 3px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15130f;
    --paper-raised: #1d1a15;
    --paper-sunk: #0e0c09;
    --ink: #f1ece1;
    --ink-muted: #a79f90;
    --rule: #34302a;
    --signal: #ff6a33;
    --signal-ink: #ff8a5c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--signal); text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
a:hover { color: var(--signal-ink); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
code, pre { font-family: var(--mono); font-size: 0.86em; }
.muted { color: var(--ink-muted); }
.small { font-size: 14px; }
.label { font: 600 12px/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(760px, 100% - 32px); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 10; background: var(--paper); padding: 8px 12px; }

/* Masthead */
.masthead { position: sticky; top: 0; z-index: 5; background: var(--paper); border-bottom: 1.5px solid var(--ink); }
.masthead-inner { display: flex; align-items: center; gap: 24px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 650; font-size: 18px; letter-spacing: -0.02em; text-decoration: none; }
.logo { color: var(--ink); flex-shrink: 0; }
.nav { display: flex; gap: 20px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav a { font: 500 12.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-muted); text-decoration: none; white-space: nowrap; padding: 21px 0 18px; border-bottom: 3px solid transparent; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current='page'] { color: var(--ink); border-bottom-color: var(--signal); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 10px 18px; border: 1.5px solid var(--ink); border-radius: var(--radius);
  background: var(--paper-raised); color: var(--ink); font-weight: 600; text-decoration: none; white-space: nowrap;
  transition: transform 120ms var(--ease), box-shadow 120ms var(--ease);
}
.btn:hover { color: var(--ink); transform: translate(-2px, -2px); box-shadow: 3px 3px 0 var(--ink); }
.btn-primary { background: var(--signal); border-color: var(--ink); color: var(--on-signal); }
.btn-primary:hover { color: var(--on-signal); }
.btn-sm { min-height: 36px; padding: 6px 12px; font-size: 14px; }

/* Home */
.hero { padding: 64px 0 40px; border-bottom: 1px solid var(--rule); }
.hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 56px; align-items: center; }
.hero-grid.reverse { grid-template-columns: 0.75fr 1.25fr; }
.kicker { color: var(--ink-muted); margin: 0 0 18px; }
.num { color: var(--signal-ink); }
.hero h1 { font-size: clamp(36px, 5.4vw, 62px); line-height: 1.04; letter-spacing: -0.035em; font-weight: 650; margin: 0; text-wrap: balance; }
.lede { font-size: 19px; color: var(--ink-muted); margin: 22px 0 0; max-width: 620px; }
.lede-sm { font-size: 18px; color: var(--ink-muted); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 12px; }
.hero-shot { margin: 0; border: 1.5px solid var(--ink); border-radius: 6px; overflow: hidden; box-shadow: 12px 12px 0 var(--signal); max-width: 380px; justify-self: center; max-height: 640px; }
.hero-grid.reverse .hero-shot { box-shadow: 12px 12px 0 var(--ink); }

.band { padding: 64px 0; border-bottom: 1px solid var(--rule); }
.section-title { display: flex; align-items: center; gap: 12px; margin: 0 0 24px; font: 600 13px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.section-title::after { content: ''; flex: 1; height: 1px; background: var(--rule); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }

.steps { list-style: none; counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 0; padding: 0; }
.steps li { counter-increment: step; padding: 22px; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--paper-raised); }
.steps li::before { content: counter(step, decimal-leading-zero); display: block; margin-bottom: 14px; font: 650 34px/1 var(--mono); color: var(--signal-ink); letter-spacing: -0.04em; }
.steps strong { display: block; font-size: 19px; margin-bottom: 6px; }

.files { list-style: none; margin: 18px 0 0; padding: 0; border-top: 1px solid var(--rule); }
.files li { display: flex; flex-direction: column; gap: 2px; padding: 10px 0; border-bottom: 1px dashed var(--rule); }
.files code { font-size: 14px; font-weight: 600; overflow-wrap: anywhere; }
.files span { color: var(--ink-muted); font-size: 15px; }
.extracts { margin: 0; display: grid; gap: 16px; }
.extracts dt { font-weight: 650; }
.extracts dd { margin: 2px 0 0; color: var(--ink-muted); font-size: 15.5px; }
.ticks { padding-left: 0; list-style: none; }
.ticks li { position: relative; padding-left: 24px; margin: 8px 0; }
.ticks li::before { content: ''; position: absolute; left: 0; top: 0.55em; width: 10px; height: 10px; background: var(--signal); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { display: flex; flex-direction: column; gap: 8px; padding: 22px; border: 1.5px solid var(--ink); border-radius: var(--radius); background: var(--paper-raised); text-decoration: none; transition: transform 120ms var(--ease), box-shadow 120ms var(--ease); }
.card:hover { color: var(--ink); transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--signal); }
.card strong { font-size: 20px; }
.card span { color: var(--ink-muted); font-size: 15.5px; flex: 1; }
.card code { padding: 8px 10px; background: var(--paper-sunk); border-radius: 2px; font-size: 12.5px; overflow-wrap: anywhere; }

.plans { width: 100%; border-collapse: collapse; }
.plans th, .plans td { padding: 12px 10px; border-bottom: 1px solid var(--rule); text-align: left; }
.plans thead th { font: 600 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; border-bottom: 1.5px solid var(--ink); }
.plans td { text-align: center; width: 90px; font-family: var(--mono); }
.plans tbody th { font-weight: 450; }
.yes { color: var(--signal-ink); }
.no { color: var(--ink-muted); }

.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 32px 18px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 4px; top: 14px; font: 500 24px/1 var(--mono); color: var(--signal-ink); }
.faq details[open] summary::after { content: '–'; }
.faq h3 { display: inline; font-size: 18px; font-weight: 600; margin: 0; }
.faq p { margin: 0 0 20px; color: var(--ink-muted); }

/* Articles and docs */
.doc-grid { width: min(1240px, 100% - 32px); margin: 0 auto; display: grid; grid-template-columns: 220px minmax(0, 720px) 220px; gap: 48px; justify-content: center; padding: 48px 0 80px; }
.side, .toc { position: sticky; top: 92px; align-self: start; font-size: 14.5px; }
.side ul, .toc ol { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 8px; }
.side a, .toc a { text-decoration: none; color: var(--ink-muted); }
.side a:hover, .toc a:hover { color: var(--ink); }
.side a[aria-current='page'] { color: var(--ink); font-weight: 600; box-shadow: inset 3px 0 0 var(--signal); padding-left: 10px; }
.toc { border-left: 1px solid var(--rule); padding-left: 16px; }
.prose .meta { color: var(--ink-muted); margin: 0 0 14px; }
.prose h1 { font-size: clamp(32px, 4.2vw, 46px); line-height: 1.08; letter-spacing: -0.03em; font-weight: 650; margin: 0 0 20px; text-wrap: balance; }
.prose h1 + p { font-size: 19.5px; color: var(--ink); }
.prose h2 { font-size: 27px; line-height: 1.2; letter-spacing: -0.02em; margin: 52px 0 14px; padding-top: 16px; border-top: 1.5px solid var(--ink); }
.prose h3 { font-size: 20px; margin: 32px 0 8px; }
.prose p, .prose li { color: var(--ink); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--signal-ink); }
.prose :not(pre) > code { padding: 1px 5px; background: var(--paper-sunk); border-radius: 2px; overflow-wrap: anywhere; }
.prose pre, .band pre { margin: 18px 0; padding: 16px 18px; overflow-x: auto; background: var(--paper-sunk); border: 1px solid var(--rule); border-left: 3px solid var(--signal); border-radius: var(--radius); line-height: 1.55; }
.prose blockquote { margin: 20px 0; padding: 4px 18px; border-left: 3px solid var(--ink); color: var(--ink-muted); }
.table-wrap { overflow-x: auto; margin: 20px 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; }
.prose th, .prose td { padding: 9px 10px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.prose thead th { font: 600 12px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; border-bottom: 1.5px solid var(--ink); }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }
.prose #faq ~ h3 { padding-top: 6px; }

/* Footer */
.footer { margin-top: 0; border-top: 1.5px solid var(--ink); padding-bottom: 32px; }
.strip { display: flex; height: 12px; }
.strip i { flex: 1; }
.strip i:nth-child(1) { background: #3a342b; } .strip i:nth-child(2) { background: #4f46e5; } .strip i:nth-child(3) { background: #f4f1ea; }
.strip i:nth-child(4) { background: #ff4f12; } .strip i:nth-child(5) { background: #6b7280; } .strip i:nth-child(6) { background: #fcd34d; }
.strip i:nth-child(7) { background: #111827; } .strip i:nth-child(8) { background: #e5e7eb; } .strip i:nth-child(9) { background: #92400e; }
.strip i:nth-child(10) { background: #818cf8; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding: 40px 0 24px; }
.footer-inner nav { display: flex; flex-direction: column; gap: 8px; font-size: 15px; }
.footer-inner nav a { text-decoration: none; color: var(--ink-muted); }
.footer-inner nav a:hover { color: var(--ink); }
.footer-inner p.muted { font-size: 15px; max-width: 420px; }

@media (max-width: 1100px) {
  .doc-grid { grid-template-columns: minmax(0, 1fr); max-width: 760px; }
  .side, .toc { position: static; }
  .toc { order: -1; }
  .side { order: 3; border-top: 1px solid var(--rule); padding-top: 20px; }
}
@media (max-width: 860px) {
  body { font-size: 16px; }
  .masthead-inner { gap: 14px; }
  .masthead .btn-sm { display: none; }
  .hero { padding-top: 40px; }
  .hero-grid, .hero-grid.reverse, .two-col { grid-template-columns: 1fr; gap: 36px; }
  .hero-grid.reverse .hero-shot { order: 2; }
  .steps, .cards { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner > div:first-child { grid-column: 1 / -1; }
  .band { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .btn:hover, .card:hover { transform: none; }
}