/* Studio Yebisu — shared styles for index.html and case.html. System fonts only, no external assets.
   Mobile is the base; wider layouts are added at 600px, 900px and 1100px.
   Layout contract (see docs/MOBILE_WEB.md): sticky masthead, fixed bottom bar below 900px,
   safe-area insets on every edge-touching band, 44px touch targets. */

:root {
  --paper: #f2eee3;
  --paper-deep: #e7e1d0;
  --field: #fbf9f3;
  --ink: #17150f;
  --ink-soft: #4f4a3f;
  --rule: rgba(23, 21, 15, 0.2);
  --orange: #ff4f00;
  --lime: #cbef3a;

  --mincho: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "BIZ UDPMincho", "Noto Serif JP", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "YuGothic", "Meiryo", "Noto Sans JP", system-ui, sans-serif;

  --gutter: 1.25rem;
  --max: 80rem;
  --measure: 40em;
  --header-h: 3.25rem;
  --tabbar-h: 3.5rem;

  /* Side padding that never sits under a notch or rounded corner, and does not add the inset twice. */
  --pad-l: max(var(--gutter), env(safe-area-inset-left));
  --pad-r: max(var(--gutter), env(safe-area-inset-right));
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* In-page anchors stop below the sticky masthead. */
  scroll-padding-top: calc(var(--header-h) + env(safe-area-inset-top) + 0.75rem);
  scroll-padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.7;
  line-break: strict;
  overflow-wrap: break-word;
  /* Room for the fixed bottom bar. */
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
button, input, select, textarea { font: inherit; color: inherit; }
a, button, input, select, textarea {
  scroll-margin-top: calc(var(--header-h) + env(safe-area-inset-top) + 1rem);
  scroll-margin-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 1rem);
}
button { cursor: pointer; }
h1, h2, h3, p, ol, ul, dl, dd, figure, pre { margin: 0; }
ol, ul { padding: 0; list-style: none; }
h1, h2, h3 { text-wrap: balance; }
p, li, dd, figcaption { text-wrap: pretty; }
q { quotes: "「" "」"; }
kbd { font-family: inherit; font-size: 0.85em; padding: 0 0.35em; border: 1px solid var(--ink); }

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px var(--lime);
}
[tabindex="-1"]:focus:not(:focus-visible) { outline: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: var(--pad-l); top: -4rem; z-index: 50;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; text-decoration: none;
}
.skip:focus { top: calc(env(safe-area-inset-top) + 0.5rem); }

.icon { width: 1.5rem; height: 1.5rem; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

/* Bands: every full-width block shares the same safe side padding and the same maximum line. */
.masthead, .intro, .cases, .fields, .catalog, .howto, .colophon,
.article-head, .article-video, .article-body, .page-state {
  padding-left: max(var(--pad-l), calc((100% - var(--max)) / 2));
  padding-right: max(var(--pad-r), calc((100% - var(--max)) / 2));
}

/* Masthead */

.masthead {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  min-height: calc(var(--header-h) + env(safe-area-inset-top));
  padding-top: env(safe-area-inset-top);
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
}
.wordmark {
  display: inline-flex; align-items: center; min-height: 2.75rem;
  font-family: var(--mincho); font-weight: 700; font-size: 1.25rem; line-height: 1.2;
  letter-spacing: 0.01em; text-decoration: none;
}
.masthead-nav { display: none; }

/* Bottom bar (phones and small tablets) */

.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr);
  padding: 0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  background: var(--paper);
  border-top: 1px solid var(--ink);
}
.tab {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.125rem;
  min-width: 0; min-height: var(--tabbar-h); padding: 0.25rem 0.25rem 0.375rem;
  font-size: 0.8125rem; line-height: 1.2; font-weight: 600; text-decoration: none; text-align: center;
}
.tab span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* Labels here are semibold and the rail arrows stand alone, so their strokes are 2px. */
.tab .icon, .rail-btn .icon { stroke-width: 2; }
/* While a text field has focus the bar steps aside, so it never covers the software keyboard. */
html.is-editing .tabbar { display: none; }

/* Buttons and small controls */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  min-height: 2.75rem; padding: 0.5rem 1.125rem;
  border: 1px solid var(--ink); border-radius: 0;
  font-size: 0.9375rem; font-weight: 700; line-height: 1.4;
  text-decoration: none; text-align: center; background: transparent; color: var(--ink);
}
.btn-ink { background: var(--ink); color: var(--paper); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.text-btn {
  justify-self: start; display: inline-flex; align-items: center; min-height: 2.75rem; padding: 0.25rem 0;
  border: 0; background: none; font-size: 0.9375rem; font-weight: 700;
  text-decoration: underline; text-underline-offset: 0.22em;
}
.actions { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-top: 1rem; }

@media (prefers-reduced-motion: no-preference) {
  .btn, .chip, .rail-btn {
    transition-property: transform, background-color, color;
    transition-duration: 150ms;
    transition-timing-function: ease-out;
  }
  .btn:active:not([disabled]), .chip:active, .rail-btn:active:not([disabled]) { transform: scale(0.96); }
}

/* Shared labels */

.card-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.125rem 0.875rem;
  font-size: 0.8125rem; line-height: 1.6; color: var(--ink-soft);
}
.card-cat { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--ink); font-weight: 700; }
.card-cat::before { content: ""; width: 0.55rem; height: 0.55rem; flex: none; background: var(--orange); }
.mark { display: inline-block; width: 0.7em; height: 0.7em; flex: none; }
.mark-skill { background: var(--orange); }
.mark-support { border: 1.5px solid currentColor; }
.entry-kind { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--ink); font-weight: 700; }
.entry-case { padding: 0 0.4rem; background: var(--lime); color: var(--ink); font-weight: 700; text-decoration: none; }
a.entry-case { text-decoration: underline; }
.stage { padding: 0 0.4rem; border: 1px solid var(--ink-soft); color: var(--ink); }
.tags { display: flex; flex-wrap: wrap; gap: 0.375rem; margin-top: 0.625rem; }
.tags li { font-size: 0.8125rem; line-height: 1.5; padding: 0.0625rem 0.45rem; border: 1px solid var(--rule); }

.section-head { margin-bottom: 1rem; }
.section-title {
  font-family: var(--mincho); font-weight: 700;
  font-size: clamp(1.5rem, 1.25rem + 1.2vw, 2.25rem); line-height: 1.3; letter-spacing: 0.01em;
}
.section-note { margin-top: 0.375rem; max-width: 36em; font-size: 0.9375rem; color: var(--ink-soft); }
.kbd-hint { display: none; }

.cases, .fields, .catalog, .howto {
  padding-top: 1.75rem; padding-bottom: 2.25rem;
  border-top: 1px solid var(--ink);
}
.cases:focus, .fields:focus, .catalog:focus { outline: none; }

/* Images: a neutral inset outline keeps edges consistent on paper. */
.feature-media img, .case-card-media img, .entry-thumb img, .d-media img {
  outline: 1px solid rgba(0, 0, 0, 0.1);
  outline: 1px solid oklch(0 0 0 / 0.1);
  outline-offset: -1px;
}

/* Intro */

.intro { padding-top: 1.25rem; padding-bottom: 1.75rem; display: grid; gap: 1.25rem; }
.intro-title {
  font-family: var(--mincho); font-weight: 700;
  font-size: clamp(1.875rem, 1.35rem + 2.4vw, 3.5rem); line-height: 1.3; letter-spacing: 0.01em;
}
.phrase { display: inline-block; }
.intro-lead { margin-top: 0.625rem; max-width: 30em; color: var(--ink-soft); }

.search-label { display: block; margin-bottom: 0.375rem; padding: 0; font-size: 0.875rem; font-weight: 700; }
.search-row { display: flex; }
.search-box input {
  -webkit-appearance: none; appearance: none;
  flex: 1; width: 100%; min-width: 0; min-height: 3rem; padding: 0.5rem 0.875rem;
  font-size: 1.0625rem; line-height: 1.4;
  border: 1.5px solid var(--ink); border-radius: 0; background: var(--field);
}
.search-box input::placeholder { color: #77705f; opacity: 1; }
.search-submit {
  flex: none; min-width: 4.75rem; min-height: 3rem; padding: 0 1rem;
  border: 1.5px solid var(--ink); border-left: 0; border-radius: 0;
  background: var(--ink); color: var(--paper); font-size: 1rem; font-weight: 700;
}

.tally { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; margin-top: 1rem; font-size: 0.875rem; color: var(--ink-soft); }
.tally div { display: flex; align-items: baseline; gap: 0.375rem; }
.tally dd { color: var(--ink); }
.num { font-family: var(--mincho); font-weight: 700; font-size: 1.25rem; line-height: 1; font-variant-numeric: tabular-nums; }
.tally-note { margin-top: 0.375rem; font-size: 0.8125rem; color: var(--ink-soft); }

/* Cases: one feature, then every other case in a native horizontal list */

.feature { display: grid; gap: 0.875rem; }
.feature-media, .case-card-media { display: block; background: var(--paper-deep); }
.feature-media img, .case-card-media img {
  width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: var(--paper-deep);
}
.feature-media.is-missing, .case-card-media.is-missing { display: none; }
.feature-title {
  margin-top: 0.25rem;
  font-family: var(--mincho); font-weight: 700;
  font-size: clamp(1.5rem, 1.25rem + 1.4vw, 2.5rem); line-height: 1.35;
}
.feature-title a, .case-card-title a { text-decoration-color: transparent; }
.feature-summary { margin-top: 0.5rem; max-width: 34em; }

.rail-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  margin-top: 2rem; padding-top: 0.75rem; border-top: 1px solid var(--rule);
}
.rail-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.75rem; font-weight: 700; font-size: 0.9375rem; }
.rail-order { font-weight: 400; font-size: 0.8125rem; color: var(--ink-soft); }
.rail-controls { display: flex; gap: 0.5rem; flex: none; }
.rail-btn {
  display: inline-grid; place-items: center; width: 2.75rem; height: 2.75rem; padding: 0;
  border: 1px solid var(--ink); border-radius: 0; background: transparent; color: var(--ink);
}
.rail-btn:disabled { opacity: 0.35; cursor: default; }

.case-rail {
  display: grid; grid-auto-flow: column; grid-auto-columns: min(80%, 19rem); gap: 1rem;
  margin: 0.75rem calc(-1 * var(--pad-r)) 0 calc(-1 * var(--pad-l));
  padding: 0 var(--pad-r) 0.75rem var(--pad-l);
  scroll-padding-inline: var(--pad-l) var(--pad-r);
  overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.case-card { position: relative; display: flex; flex-direction: column; min-width: 0; scroll-snap-align: start; }
.case-card-body { display: flex; flex-direction: column; flex: 1; padding-top: 0.625rem; }
.case-card-title { margin-top: 0.125rem; font-family: var(--mincho); font-weight: 700; font-size: 1.125rem; line-height: 1.45; }
/* Title links reach 44px through padding; the negative margin keeps the visual spacing. */
.case-card-title a, .feature-title a { display: block; margin: -0.375rem 0; padding: 0.375rem 0; }
.case-card-summary {
  margin-top: 0.375rem; font-size: 0.9375rem; line-height: 1.65; color: var(--ink-soft);
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; overflow: hidden;
}
.case-card-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 1rem; margin-top: auto; padding-top: 0.25rem; }
.case-card-demo { display: inline-flex; align-items: center; min-height: 2.75rem; font-size: 0.9375rem; font-weight: 700; }
.case-card-date { font-size: 0.8125rem; color: var(--ink-soft); font-variant-numeric: tabular-nums; }

.inline-error { margin-top: 1.25rem; padding-top: 0.75rem; border-top: 1px solid var(--rule); color: var(--ink-soft); }
.inline-error .btn { margin-top: 0.75rem; }

/* Fields */

.field-map { display: grid; gap: 1.5rem; }
.field-map[aria-busy="true"] { min-height: 18rem; }
.field-group-name {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.625rem;
  padding-bottom: 0.25rem; border-bottom: 1px solid var(--ink);
  font-family: var(--mincho); font-weight: 700; font-size: 1.0625rem; line-height: 1.5;
}
.field-group-name span { font-family: var(--sans); font-weight: 400; font-size: 0.8125rem; color: var(--ink-soft); }
.field-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1rem; }
.field-list li { display: flex; min-width: 0; }
.field-link {
  flex: 1; min-width: 0; min-height: 3rem;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "name count" "desc desc";
  column-gap: 0.5rem; align-items: center; align-content: center;
  padding: 0.375rem 0; border-bottom: 1px solid var(--rule);
  text-decoration: none;
}
.field-name { grid-area: name; font-weight: 700; font-size: 0.9375rem; line-height: 1.4; }
.field-count { grid-area: count; font-family: var(--mincho); font-weight: 700; font-size: 1.125rem; line-height: 1; font-variant-numeric: tabular-nums; }
.field-desc { grid-area: desc; display: none; }
.field-link[aria-current="true"] { box-shadow: inset -3px 0 0 var(--orange); }
.field-link[aria-current="true"] .field-count { color: #b83900; }
.field-group.is-placeholder .field-group-name { width: 6rem; background: var(--paper-deep); border-bottom-color: var(--paper-deep); }
.field-skel { display: block; flex: 1; height: 2.25rem; margin: 0.375rem 0; background: var(--paper-deep); }
.field-error { padding: 1rem 0; color: var(--ink-soft); }

/* Catalog */

.catalog { display: grid; gap: 1.25rem; }
.catalog-rail, .catalog-body { min-width: 0; }
.toolbar { display: grid; gap: 1rem; }
.field-select { min-width: 0; }
.select-wrap { position: relative; }
.select-wrap::after {
  content: ""; position: absolute; right: 1rem; top: 50%; pointer-events: none;
  width: 0.5rem; height: 0.5rem; margin-top: -0.375rem;
  border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: rotate(45deg);
}
.field-select select {
  -webkit-appearance: none; appearance: none;
  display: block; width: 100%; min-height: 3rem; padding: 0.5rem 2.5rem 0.5rem 0.875rem;
  border: 1.5px solid var(--ink); border-radius: 0; background: var(--field);
  font-size: 1rem; line-height: 1.4; text-overflow: ellipsis;
}
.field-hint { margin-top: 0.25rem; font-size: 0.8125rem; line-height: 1.6; color: var(--ink-soft); }
.filter { border: 0; margin: 0; padding: 0; min-width: 0; }
.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  display: inline-flex; align-items: center; gap: 0.45rem;
  min-height: 2.75rem; padding: 0.375rem 0.875rem;
  border: 1px solid var(--ink); border-radius: 0; background: transparent; color: var(--ink);
  font-size: 0.9375rem; line-height: 1.3; text-align: left;
}
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); font-weight: 700; }
.chip[aria-pressed="true"] .mark-skill { outline: 1px solid var(--paper); }
.chip-count { font-size: 0.8125rem; font-variant-numeric: tabular-nums; }
.chip-check { justify-self: start; cursor: pointer; }
.chip-check input { width: 1.125rem; height: 1.125rem; margin: 0; accent-color: var(--ink); }
.chip-check:has(input:checked) { background: var(--paper-deep); box-shadow: inset 0 0 0 1px var(--ink); font-weight: 700; }
.chip-check:has(input:focus-visible) { outline: 3px solid var(--ink); outline-offset: 2px; box-shadow: 0 0 0 5px var(--lime); }

.result-status {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.125rem 0.875rem;
  padding-bottom: 0.625rem; border-bottom: 1px solid var(--ink);
  font-size: 0.875rem; color: var(--ink-soft);
}
.status-main { color: var(--ink); font-size: 1rem; }
.result-status strong { margin-right: 0.125rem; font-family: var(--mincho); font-size: 1.5rem; line-height: 1; font-variant-numeric: tabular-nums; }
.status-filters { flex-basis: 100%; }
.category-desc {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.875rem;
  padding: 0.875rem 0; border-bottom: 1px solid var(--rule); font-size: 0.9375rem;
}
.category-desc strong { font-family: var(--mincho); font-size: 1.1875rem; }
.category-group { font-size: 0.8125rem; line-height: 1.5; padding: 0 0.45rem; border: 1px solid var(--ink); }
.category-total { font-size: 0.8125rem; color: var(--ink-soft); font-variant-numeric: tabular-nums; }

.entries[aria-busy="true"] { min-height: 24rem; }
.entry {
  display: grid; grid-template-columns: minmax(0, 1fr); column-gap: 0.875rem;
  padding: 1rem 0 1.125rem; border-bottom: 1px solid var(--rule);
}
.entry.has-thumb { grid-template-columns: minmax(0, 1fr) 5.5rem; }
.entry > * { grid-column: 1; min-width: 0; }
.entry > .entry-thumb { grid-column: 2; grid-row: 1 / span 3; align-self: start; margin-top: 0.25rem; }
.entry-thumb img { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: var(--paper-deep); }
.entry-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.125rem 0.75rem; font-size: 0.8125rem; line-height: 1.6; color: var(--ink-soft); }
.entry-name { margin-top: 0.125rem; font-size: 1.1875rem; line-height: 1.4; }
/* The title is the card's link; padding gives it a 44px touch height without changing the rhythm. */
.entry-name a { display: block; margin: -0.3125rem 0; padding: 0.5625rem 0; text-decoration-color: var(--rule); }
.entry.is-skill .entry-name { font-family: var(--mincho); font-weight: 700; }
.entry.is-support .entry-name { font-weight: 700; }
.entry-summary { margin-top: 0.25rem; max-width: var(--measure); }
.entry-use { margin-top: 0.375rem; max-width: var(--measure); font-size: 0.9375rem; color: var(--ink-soft); }
.entry-use-label { display: inline-block; margin-right: 0.5rem; padding: 0 0.375rem; border: 1px solid var(--rule); font-size: 0.8125rem; color: var(--ink); }

.placeholder-row { padding: 1.25rem 0; border-bottom: 1px solid var(--rule); }
.placeholder-row span { display: block; height: 1rem; margin-top: 0.6rem; background: var(--paper-deep); }
.placeholder-row span:first-child { width: 35%; height: 1.5rem; margin-top: 0; }
.placeholder-row span:last-child { width: 70%; }

.more { display: flex; flex-wrap: wrap; gap: 0 0.75rem; width: 100%; margin-top: 1.25rem; min-height: 3rem; }
.more-rest { font-weight: 400; font-size: 0.875rem; font-variant-numeric: tabular-nums; }

.empty, .load-error { padding: 2rem 0; border-bottom: 1px solid var(--ink); max-width: var(--measure); }
.empty p + p, .load-error p + p { margin-top: 0.5rem; }
.empty .btn, .load-error .btn { margin-top: 1rem; }
.empty-title { font-family: var(--mincho); font-weight: 700; font-size: 1.375rem; line-height: 1.45; }

/* How to */

.howto-steps { display: grid; gap: 1.25rem; counter-reset: step; }
.howto-steps li { counter-increment: step; padding-top: 0.75rem; border-top: 1px solid var(--rule); }
.howto-steps h3 { display: flex; align-items: baseline; gap: 0.625rem; font-size: 1.0625rem; line-height: 1.5; margin-bottom: 0.25rem; }
.howto-steps h3::before { content: counter(step); font-family: var(--mincho); font-weight: 700; font-size: 1.5rem; line-height: 1; color: #b83900; font-variant-numeric: tabular-nums; }
.howto-steps p { max-width: var(--measure); }

/* Colophon */

.colophon {
  display: grid; gap: 1.5rem;
  padding-top: 2rem; padding-bottom: 2rem;
  border-top: 1px solid var(--ink);
  font-size: 0.9375rem;
}
.colophon-main p + p { margin-top: 0.625rem; max-width: 34em; }
.wordmark-small { font-family: var(--mincho); font-weight: 700; font-size: 1.375rem; }
.colophon-updated { color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.colophon-links { display: flex; flex-direction: column; border-top: 1px solid var(--ink); }
.colophon-links a { display: flex; align-items: center; min-height: 2.75rem; border-bottom: 1px solid var(--rule); text-decoration: none; }
.colophon-cats { display: flex; flex-wrap: wrap; gap: 0 1.125rem; padding-top: 0.375rem; border-top: 1px solid var(--ink); font-size: 0.9375rem; }
.colophon-cats a { display: inline-flex; align-items: center; min-height: 2.75rem; text-decoration: none; }

/* Article (case.html) */

.page-state { padding-top: 2.5rem; padding-bottom: 3rem; }
.page-state > * { max-width: var(--measure); }
.page-state p { margin-top: 0.5rem; }

.crumbs ol { display: flex; flex-wrap: wrap; font-size: 0.875rem; }
.crumbs li { display: flex; align-items: center; }
.crumbs li + li::before { content: "›"; margin: 0 0.5rem; color: var(--ink-soft); }
.crumbs a { display: inline-flex; align-items: center; min-height: 2.75rem; }

.article-head { padding-top: 0.25rem; padding-bottom: 1.5rem; }
.article-head > .card-meta { margin-top: 0.25rem; }
.article-title {
  margin-top: 0.375rem; max-width: 22em;
  font-family: var(--mincho); font-weight: 700;
  font-size: clamp(1.875rem, 1.35rem + 2.2vw, 3.5rem); line-height: 1.3; letter-spacing: 0.005em;
}
.article-title-entry { font-size: clamp(1.875rem, 1.4rem + 1.8vw, 3rem); }
.tl { display: inline-block; max-width: 100%; overflow-wrap: anywhere; text-wrap: balance; }
.article-lead { margin-top: 0.75rem; max-width: var(--measure); font-size: 1.0625rem; }
.more-text { margin-top: 0.5rem; max-width: var(--measure); }
.more-text summary {
  display: inline-flex; align-items: center; min-height: 2.75rem;
  font-size: 0.9375rem; font-weight: 700; cursor: pointer;
  text-decoration: underline; text-underline-offset: 0.22em;
}
.more-text p { margin-top: 0.25rem; }
.facts {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1rem;
  margin-top: 1.25rem; max-width: 36rem; border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}
.facts div { min-width: 0; padding: 0.375rem 0; border-bottom: 1px solid var(--rule); }
.facts dt { font-size: 0.8125rem; color: var(--ink-soft); }
.facts dd { font-weight: 600; overflow-wrap: anywhere; }
.status-note { margin-top: 1rem; max-width: var(--measure); padding: 0.625rem 0.875rem; border-left: 3px solid var(--ink); background: var(--field); font-size: 0.9375rem; }
.status-note strong { display: block; font-size: 0.8125rem; }

.article-video { padding-bottom: 0.5rem; }
.article-video figure { max-width: 64rem; }
.video-frame { background: var(--ink); }
.article-video video { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: var(--ink); }
.video-fallback { display: grid; place-items: center; aspect-ratio: 16 / 9; padding: 1.25rem; color: var(--paper); text-align: center; }
.article-video figcaption { padding-top: 0.625rem; font-size: 0.9375rem; color: var(--ink-soft); }
.video-note { max-width: var(--measure); }
.video-links { display: flex; flex-wrap: wrap; gap: 0 1.25rem; }
.video-links a { display: inline-flex; align-items: center; min-height: 2.75rem; color: var(--ink); font-weight: 700; }

.article-body { padding-top: 1rem; padding-bottom: 3rem; }
.toc { margin-bottom: 1.5rem; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule); }
.toc-title { padding-top: 0.5rem; font-size: 0.8125rem; font-weight: 700; color: var(--ink-soft); }
.toc ol {
  display: flex; gap: 0.5rem; padding: 0.375rem 0 0.75rem;
  margin: 0 calc(-1 * var(--pad-r)) 0 calc(-1 * var(--pad-l));
  padding-left: var(--pad-l); padding-right: var(--pad-r);
  overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin;
}
.toc li { flex: none; }
.toc a {
  display: inline-flex; align-items: center; min-height: 2.75rem; padding: 0 0.875rem;
  border: 1px solid var(--ink); font-size: 0.9375rem; text-decoration: none; white-space: nowrap;
}

.article-main { min-width: 0; max-width: 52rem; }
.article-main > .d-media { margin-bottom: 2rem; }
.a-section { padding-top: 0.875rem; border-top: 1px solid var(--ink); }
.a-section + .a-section { margin-top: 2.5rem; }
.a-section > h2 { margin-bottom: 0.875rem; font-family: var(--mincho); font-weight: 700; font-size: clamp(1.375rem, 1.15rem + 1vw, 2rem); line-height: 1.35; }
.a-section > p { max-width: var(--measure); }
.a-section > p + p, .a-section > p + .samples, .a-section > p + .prompt { margin-top: 1rem; }

.demo-callout { display: grid; gap: 1rem; padding: 1rem 1.125rem 1.125rem; border: 1px solid var(--ink); border-top: 4px solid var(--orange); background: var(--field); }
.demo-callout p { max-width: var(--measure); }
.demo-callout .btn { justify-self: start; }

.samples { border-top: 1px solid var(--ink); }
.sample { display: grid; gap: 0.875rem; padding: 1.25rem 0; border-bottom: 1px solid var(--rule); }
.sample-title { font-size: 1.0625rem; line-height: 1.5; }
.sample-part { min-width: 0; }
.sample-part.is-output { padding-left: 0.875rem; border-left: 3px solid var(--lime); }
.sample-label { margin-bottom: 0.25rem; font-size: 0.8125rem; font-weight: 700; color: var(--ink-soft); }
.sample-quote { font-family: var(--mincho); font-size: 1.1875rem; line-height: 1.6; }
.sample-text { white-space: pre-wrap; max-width: var(--measure); }
.sample-code, .prompt-text {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  white-space: pre-wrap; overflow-wrap: anywhere;
}
.sample-code {
  max-height: 24rem; overflow: auto; padding: 0.75rem 0.875rem;
  border: 1px solid var(--rule); background: var(--field); font-size: 0.875rem; line-height: 1.6;
}
.sample-more summary {
  display: inline-flex; align-items: center; min-height: 2.75rem;
  font-size: 0.9375rem; font-weight: 700; cursor: pointer;
  text-decoration: underline; text-underline-offset: 0.22em;
}
.sample-facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0.25rem 1rem; font-size: 0.9375rem; }
.sample-facts dt { color: var(--ink-soft); }
.checks li { padding-left: 1.1em; text-indent: -1.1em; }
.checks li::before { content: "□"; display: inline-block; width: 1.1em; text-indent: 0; }
.sample-link { display: inline-flex; align-items: center; min-height: 2.75rem; font-size: 0.9375rem; font-weight: 700; justify-self: start; }

.prompt { border: 1px solid var(--ink); background: var(--field); }
.prompt-bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1rem;
  padding: 0.375rem 0.375rem 0.375rem 0.875rem; border-bottom: 1px solid var(--ink);
}
.prompt-label { font-size: 0.875rem; font-weight: 700; }
.prompt-text {
  padding: 0.875rem; max-height: none; overflow: auto;
  font-family: var(--sans); font-size: 1rem; line-height: 1.75;
  -webkit-user-select: text; user-select: text;
}
.prompt.is-collapsed .prompt-text { max-height: 16rem; }
.prompt-foot { padding: 0 0.875rem; border-top: 1px solid var(--rule); }
.prompt-hint { padding: 0.5rem 0.875rem; border-top: 1px solid var(--ink); font-size: 0.9375rem; font-weight: 700; }

.steps { counter-reset: step; border-top: 1px solid var(--rule); }
.steps li { counter-increment: step; display: grid; grid-template-columns: 2.25rem minmax(0, 1fr); gap: 0 0.75rem; padding: 0.875rem 0; border-bottom: 1px solid var(--rule); }
.steps li::before { content: counter(step); grid-row: span 2; font-family: var(--mincho); font-weight: 700; font-size: 1.75rem; line-height: 1; color: #b83900; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 1rem; font-weight: 700; }
.steps p { max-width: var(--measure); }

.applied { border-top: 1px solid var(--rule); }
.applied div { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0.25rem; padding: 0.875rem 0; border-bottom: 1px solid var(--rule); }
.applied dt, .applied dd { min-width: 0; overflow-wrap: anywhere; }
.applied dt { font-family: var(--mincho); font-weight: 700; font-size: 1.125rem; line-height: 1.45; }
.applied dt small { display: block; font-family: var(--sans); font-weight: 400; font-size: 0.8125rem; color: var(--ink-soft); overflow-wrap: anywhere; }
.applied dd { max-width: var(--measure); }

.limits li { position: relative; max-width: var(--measure); padding: 0.5rem 0 0.5rem 1.25rem; border-bottom: 1px solid var(--rule); }
.limits li::before { content: ""; position: absolute; left: 0; top: 1.3rem; width: 0.625rem; height: 1px; background: var(--ink); }

.downloads { display: grid; border-top: 1px solid var(--ink); }
.downloads a { display: block; padding: 0.75rem 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.downloads strong { display: block; font-size: 1rem; text-decoration: underline; text-underline-offset: 0.22em; text-decoration-thickness: 1px; overflow-wrap: anywhere; }
.downloads span { font-size: 0.875rem; color: var(--ink-soft); }

.d-links { border-top: 1px solid var(--rule); }
.d-links a { display: flex; flex-direction: column; justify-content: center; min-height: 2.75rem; padding: 0.5rem 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.d-link-label { text-decoration: underline; text-underline-offset: 0.22em; }
.d-links small { font-size: 0.8125rem; color: var(--ink-soft); overflow-wrap: anywhere; }
.d-note { margin-top: 0.5rem; max-width: var(--measure); font-size: 0.875rem; color: var(--ink-soft); }
.d-inline { display: block; margin-top: 0.125rem; }
.d-list { padding-left: 1.5rem; list-style: revert; max-width: var(--measure); }
.d-list li + li { margin-top: 0.375rem; }
.d-facts { display: grid; border-top: 1px solid var(--rule); }
.d-facts div { display: grid; gap: 0.125rem; padding: 0.625rem 0; border-bottom: 1px solid var(--rule); }
.d-facts dt { font-size: 0.8125rem; font-weight: 700; color: var(--ink-soft); }
.d-facts dd { min-width: 0; }
.url { overflow-wrap: anywhere; }
.d-media { border: 1px solid var(--rule); background: var(--paper-deep); }
.d-media img, .d-media video { width: 100%; }
.d-media.is-missing { display: none; }

/* Wider phones and small tablets */

@media (min-width: 600px) {
  :root { --gutter: 2rem; }
  .field-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .case-rail { grid-auto-columns: min(46%, 20rem); }
  .facts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .d-facts div { grid-template-columns: 8rem minmax(0, 1fr); gap: 1rem; }
  .downloads { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1.5rem; }
}

/* Desktop: masthead navigation replaces the bottom bar */

@media (min-width: 900px) {
  :root { --gutter: clamp(2rem, 4vw, 3.5rem); }
  body { font-size: 1.0625rem; padding-bottom: 0; }
  html { scroll-padding-bottom: 0; }
  .tabbar { display: none; }
  .masthead-nav { display: flex; gap: 0.25rem 1.5rem; font-size: 0.9375rem; }
  .masthead-nav a { display: inline-flex; align-items: center; min-height: 2.75rem; text-decoration: none; }
  .kbd-hint { display: inline; }

  .intro {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: end; gap: 1.5rem 4rem;
    padding-top: 3rem; padding-bottom: 3rem;
  }
  .cases, .fields, .catalog, .howto { padding-top: 2.5rem; padding-bottom: 3.5rem; }

  .feature { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); align-items: center; gap: 2.5rem; }
  .case-rail {
    grid-auto-columns: calc((100% - 2 * 1.25rem) / 3); gap: 1.25rem;
    margin-left: 0; margin-right: 0; padding-left: 0; padding-right: 0; scroll-padding-inline: 0;
  }

  .field-map { gap: 1.75rem; }
  .field-group { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: 0 2rem; }
  .field-group-name { flex-direction: column; gap: 0; align-self: start; border-bottom: 0; border-top: 1px solid var(--ink); padding-top: 0.5rem; }
  .field-list { grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); column-gap: 1.5rem; border-top: 1px solid var(--ink); }
  .field-link { min-height: 3.75rem; padding: 0.5rem 0 0.625rem; }
  .field-desc {
    display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden;
    margin-top: 0.125rem; font-size: 0.8125rem; line-height: 1.55; color: var(--ink-soft);
  }

  .entry.has-thumb { grid-template-columns: minmax(0, 1fr) 9rem; column-gap: 1.5rem; }
  .entry-name { font-size: 1.375rem; }

  .howto-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
  .colophon { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 3rem; }

  .article-head { padding-top: 1rem; padding-bottom: 2rem; }
  .tl { display: block; }
  .tl-sep { display: none; }
  .demo-callout { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
  .sample { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: 1.75rem; }
  .sample-title, .sample-link { grid-column: 1 / -1; }
  .applied div { grid-template-columns: minmax(10rem, 15rem) minmax(0, 1fr); gap: 0.25rem 1.5rem; }
}

/* Wide desktop: catalog filters and article contents sit in a side column */

@media (min-width: 1100px) {
  .case-rail { grid-auto-columns: calc((100% - 3 * 1.25rem) / 4); }
  .catalog { grid-template-columns: minmax(16rem, 20rem) minmax(0, 1fr); gap: 0 4rem; }
  .article-body { display: grid; grid-template-columns: minmax(11rem, 14rem) minmax(0, 1fr); gap: 0 4rem; padding-top: 2rem; }
  .toc { align-self: start; margin-bottom: 0; border-bottom: 0; }
  .toc ol { flex-direction: column; gap: 0; margin: 0; padding: 0; overflow: visible; }
  .toc a { display: flex; min-height: 2.5rem; padding: 0.25rem 0; border: 0; border-bottom: 1px solid var(--rule); white-space: normal; }
}
@media (min-width: 1100px) and (min-height: 760px) {
  /* Sticky only when the column fits on screen, so it never traps content. */
  .catalog-rail, .toc { position: sticky; top: calc(var(--header-h) + 1rem); }
}

/* Hover is an enhancement for precise pointers only. */

@media (hover: hover) and (pointer: fine) {
  a:hover { text-decoration-thickness: 2px; }
  .btn-ink:hover { background: #2e2a21; }
  .btn-line:hover, .chip:not([aria-pressed="true"]):hover, .rail-btn:not(:disabled):hover { background: var(--paper-deep); }
  .search-submit:hover { background: #2e2a21; }
  .field-select select:hover { background: var(--paper-deep); }
  .entry-name a:hover, .case-card-title a:hover, .feature-title a:hover { text-decoration-color: currentColor; }
  .field-link:hover { box-shadow: inset 3px 0 0 var(--ink); }
  .masthead-nav a:hover, .colophon-links a:hover, .colophon-cats a:hover, .toc a:hover, .d-links a:hover .d-link-label { text-decoration: underline; }
  .downloads a:hover strong { text-decoration-thickness: 2px; }
}

/* Short landscape screens: the masthead scrolls away and the bottom bar gets lower. */

@media (max-height: 500px) and (orientation: landscape) {
  :root { --tabbar-h: 2.75rem; }
  .masthead { position: static; }
  html { scroll-padding-top: 1rem; }
  .tab { flex-direction: row; gap: 0.375rem; padding-bottom: 0.25rem; }
  .tab .icon { width: 1.25rem; height: 1.25rem; }
  .catalog-rail, .toc { position: static; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}