/* Design Kits — page layer over the Felt Route kit (../kit). Paper, graphite, marker inks.
   Colour lives only in the routes and the little marks that point at them; type stays graphite. */

:root {
  --fr-paper: #f6f0e3;
  --_line: color-mix(in srgb, var(--fr-graphite) 18%, transparent);
  --_line-strong: color-mix(in srgb, var(--fr-graphite) 70%, transparent);
  --_card: color-mix(in srgb, var(--fr-paper) 60%, white);
  --_gutter: clamp(16px, 4vw, 48px);
  --_measure: 64ch;
}
[data-fr-mode="newsprint"] { --fr-paper: #e6e5e0; --_card: color-mix(in srgb, var(--fr-paper) 70%, white); }

* { box-sizing: border-box; }
html, body { margin: 0; }
body { overflow-x: hidden; font-size: 18px; line-height: 1.55; transition: background-color var(--fr-dur-settle) var(--fr-ease-settle); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--fr-ink-cobalt); outline-offset: 2px; }
code { font: 0.9em var(--fr-face-rail); background: var(--_card); padding: 1px 5px; border-radius: 4px; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 var(--_gutter); }
.rail { font-family: var(--fr-face-rail); font-size: 13px; letter-spacing: .02em; }
.caps { font-family: var(--fr-face-rail); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 6px; }
.soft { color: var(--fr-graphite-soft); }
.h { font-family: var(--fr-face-display); font-weight: 400; text-transform: uppercase; font-size: clamp(22px, 2.6vw, 30px); line-height: 1; margin: 0 0 6px; }
.big { font-size: clamp(20px, 2.2vw, 24px); line-height: 1.38; margin: 0 0 18px; }
.note { max-width: var(--_measure); color: var(--fr-graphite-soft); }

/* ---------- top bar ---------- */
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 16px; padding-bottom: 6px; }
.brand { text-decoration: none; font-size: 14px; display: inline-block; padding: 6px 0; }
.brand b { font-weight: 400; }
.mode { font-size: 13px; }

/* ---------- the chapter rail: straight, thin, even (the machine register) ---------- */
.chapters { max-width: 1180px; margin: 0 auto; padding: 10px var(--_gutter) 0; overflow-x: auto; scrollbar-width: none; }
.chapters::-webkit-scrollbar { display: none; }
.chapters ol { display: flex; list-style: none; margin: 0; padding: 0 0 4px; min-width: max-content; }
.chapters li { position: relative; flex: 1 0 auto; min-width: 96px; }
.chapters li::before { content: ""; position: absolute; left: 0; right: 0; top: 7px; border-top: 1px solid var(--fr-graphite); }
.chapters li:first-child::before { left: 7px; }
.chapters li:last-child::before { right: auto; width: 7px; }
.chapters a { position: relative; display: flex; flex-direction: column; gap: 8px; padding-right: 14px; text-decoration: none; font: 12.5px/1.25 var(--fr-face-rail); color: var(--fr-graphite-soft); }
.chapters .n { width: 15px; height: 15px; border-radius: 50%; background: var(--fr-paper); border: 1px solid var(--fr-graphite); font-size: 0; transition: background-color var(--fr-dur-settle) var(--fr-ease-settle), transform var(--fr-dur-settle) var(--fr-ease-settle); }
.chapters a:hover .n { background: var(--fr-graphite); }
.chapters a:hover { color: var(--fr-graphite); }
.chapters [aria-current] a { color: var(--fr-graphite); }
.chapters [aria-current] .n { background: var(--fr-graphite); transform: scale(1.25); }
.chapters [aria-current] .t { background-image: linear-gradient(var(--fr-ink-yolk), var(--fr-ink-yolk)); background-size: 100% 6px; background-position: 0 92%; background-repeat: no-repeat; }

/* ---------- hero + its route ---------- */
.hero { padding-top: clamp(36px, 7vw, 72px); padding-bottom: 8px; }
.hero h1 { font-size: clamp(40px, 7.4vw, 96px); max-width: 15ch; margin: 0 0 20px; }
.hero .lede { font-size: clamp(19px, 2.2vw, 24px); line-height: 1.4; max-width: 44ch; margin: 0; }
.route { margin-top: 8px; margin-bottom: 8px; }
.route-svg { width: 100%; height: auto; display: block; }

/* ---------- body: the work, and the facts beside it ---------- */
.body { display: grid; gap: 40px; padding-top: 24px; padding-bottom: 56px; border-top: 1px solid var(--_line); }
@media (min-width: 960px) { .body { grid-template-columns: minmax(0, 1fr) 320px; gap: 56px; } .side { position: sticky; top: 24px; align-self: start; } }
.main > * + * { margin-top: 28px; }
figure { margin: 0; }
figcaption { font-family: var(--fr-face-rail); font-size: 12.5px; line-height: 1.45; color: var(--fr-graphite-soft); margin-top: 8px; max-width: 60ch; }
figcaption b { font-weight: 400; color: var(--fr-graphite); }

.three { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); }
.shot img { border: 1px solid var(--_line-strong); border-radius: 12px; background: #fff; object-fit: cover; object-position: top; }
.three .shot img { aspect-ratio: 0.8; }
.shot a { display: block; transition: transform var(--fr-dur-settle) var(--fr-ease-settle); }
.shot a:hover { transform: translateY(-3px) rotate(-0.4deg); }

/* facts: hairlines, no boxes */
.facts { margin: 0; }
.facts > div { display: grid; grid-template-columns: 11ch minmax(0, 1fr); gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--_line); }
.facts > div:first-child { border-top: 1px solid var(--_line-strong); }
.facts dt { margin: 3px 0 0; color: var(--fr-graphite-soft); }
.facts dd { margin: 0; font-size: 16px; line-height: 1.45; }
.facts.loose > div { grid-template-columns: 16ch minmax(0, 1fr); padding: 14px 0; }
@media (max-width: 600px) { .facts.loose > div { grid-template-columns: minmax(0, 1fr); gap: 2px; } }

/* steps with numbered marks: the mark carries the route's ink, the type stays graphite */
.steps, .map { list-style: none; margin: 0; padding: 0; }
.steps > li { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--_line); }
.steps > li:first-child { padding-top: 0; }
.num { flex: none; width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; color: #fff;
  font: 400 18px/1 var(--fr-face-display); background: var(--fr-graphite); box-shadow: 0 0 0 4px var(--n, var(--fr-graphite-soft)); }
.map li { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 14px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--_line); }
.map .num { width: 36px; height: 36px; font-size: 15px; }
.map b { font-family: var(--fr-face-display); font-weight: 400; font-size: 20px; display: block; line-height: 1.15; }
.map li div > span { display: block; font-size: 15.5px; color: var(--fr-graphite-soft); }

.code { margin: 10px 0; padding: 14px 16px; border: 1px solid var(--_line-strong); border-radius: 12px; background: var(--_card);
  font: 14px/1.5 var(--fr-face-rail); white-space: pre-wrap; overflow-wrap: anywhere; }
.quote { margin: 10px 0 0; padding: 2px 0 2px 18px; border-left: 6px solid var(--fr-ink-orchid); font-size: clamp(19px, 2.2vw, 23px); line-height: 1.4; max-width: 44ch; }
.quote p { margin: 0 0 8px; }

/* the kits */
.kits { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.kit { border-top: 6px solid var(--k); padding-top: 14px; }
.kit .shot img { aspect-ratio: 1.3; }
.kit p { margin: 10px 0 0; font-size: 16px; }

/* the model test */
.runs { display: grid; }
.run { display: grid; grid-template-columns: 3ch minmax(0, 1fr) auto auto; gap: 12px; align-items: center; padding: 9px 4px; border-bottom: 1px solid var(--_line);
  text-decoration: none; font-size: 15.5px; transition: background-color var(--fr-dur-settle) var(--fr-ease-settle); }
.run:hover, .run:focus-visible { background: var(--_card); }
.tag { display: inline-block; font: 11px/1 var(--fr-face-rail); letter-spacing: .08em; text-transform: uppercase; padding: 4px 8px; border-radius: 999px;
  background: color-mix(in srgb, var(--fr-ink-lagoon) 22%, white); border: 1px solid var(--fr-ink-lagoon); }
.tag.fail { background: color-mix(in srgb, var(--fr-ink-flame) 18%, white); border-color: var(--fr-ink-flame); }

/* prices */
.prices { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.price { border: 2px solid var(--fr-graphite); border-radius: 14px; padding: 18px 20px 20px; background: var(--_card); box-shadow: 6px 6px 0 var(--k); }
.price p { margin: 0 0 10px; }
.score { font-family: var(--fr-face-display); font-weight: 400; font-size: clamp(56px, 9vw, 104px); line-height: .9; }
.fr-button[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }

/* pager + credits */
.pager { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 8px; padding-bottom: 48px; }
.pager a { text-decoration: none; }
.credits { padding-top: 32px; padding-bottom: 56px; border-top: 1px solid var(--_line); font-family: var(--fr-face-rail); font-size: 12.5px; line-height: 1.6; color: var(--fr-graphite-soft); }
.credits p { max-width: 80ch; margin: 0 0 6px; }
.credits a, .kit .rail a, .side a, .note a { display: inline-block; padding: 5px 0; }

/* first paint: the hero settles in like a label landing (ghost, then ink) */
@media (prefers-reduced-motion: no-preference) {
  .hero > * { animation: land 560ms var(--fr-ease-settle) both; }
  .hero > :nth-child(2) { animation-delay: 80ms; }
  .hero > :nth-child(3) { animation-delay: 160ms; }
  @keyframes land { from { opacity: var(--fr-ghost); transform: translateY(6px); } }
}