/* Hallmark · macrostructure: custom-bespoke "改札板 (Gate Board)" · genre: editorial-utilitarian
 * tone: austere / utilitarian · anchor hue: warm-neutral (paper) × signal-green (accent, hue~155)
 * nav: N9 edge-aligned (wordmark far-left, links far-right, hairline rule beneath)
 * footer: Ft5 statement-style (large closing line + minimal link row, no 4-col link farm)
 * Rationale for bespoke macrostructure (not a catalog pick): the whole site's job is a single
 * literal signage device — a gate-flap gauge that opens/closes — so the page rhythm borrows the
 * grammar of a station departure/indicator board (row-labelled panels, hairline rules, monospace
 * numerals) rather than any hero→3-feature→CTA template. No map, no route diagram, no scale UI
 * (reserved for other sites in the portfolio). theme: custom (vibe: "warm concourse concrete ×
 * deep signal green, utilitarian signage, not travel-brochure" · paper oklch(94% 0.012 80) ·
 * accent oklch(46% 0.095 155) deep-green · display Zen Kaku Gothic New + body Noto Sans JP +
 * numerals-only Space Mono)
 * diversification vs. recent sites: paper band = light (unlike site38 near-black, site31 iron-black,
 * site35 indigo-dark); display style = grotesk/gothic-sans (unlike site37 serif-burgundy, site36
 * petrol-serif); accent hue = green (unlike site34 orange-safety, site33 red, site32 fluor-orange).
 * pre-emit critique: P4 H4 E4 S4 R4 V4
 */

@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; }
body { overflow-x: clip; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-style: normal;
  line-height: 1.22;
  margin: 0 0 var(--space-4);
  overflow-wrap: anywhere;
  min-width: 0;
}

p { margin: 0 0 var(--space-4); max-width: 62ch; }

.num, .gauge-value, .gauge-unit, time, .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.wrap {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

::selection { background: var(--color-signal); color: var(--color-signal-ink); }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  transition: none;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--color-ink); color: var(--color-paper);
  padding: var(--space-3) var(--space-4); z-index: 999;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* ---------------------------------------------------------------------- */
/* PR disclosure strip — present on every page                            */
/* ---------------------------------------------------------------------- */
.pr-strip {
  background: var(--color-concrete-deep);
  color: var(--color-paper);
  font-size: var(--text-xs);
  letter-spacing: .02em;
  text-align: center;
  padding: var(--space-2) var(--space-4);
}
.pr-strip a { color: var(--color-signal-dim); text-decoration: underline; text-underline-offset: 2px; }

/* ---------------------------------------------------------------------- */
/* Nav — N9 edge-aligned                                                  */
/* ---------------------------------------------------------------------- */
.site-nav {
  position: sticky; top: 0; z-index: 40;
  background: var(--color-paper);
  border-bottom: var(--rule-hair) solid var(--color-concrete);
}
.site-nav .wrap {
  position: relative;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: var(--space-5); flex-wrap: nowrap;
}
.brand {
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg);
  letter-spacing: .01em; white-space: nowrap; text-decoration: none;
  display: flex; align-items: baseline; gap: var(--space-2);
}
.brand:hover .brand-mark, .brand:focus-visible .brand-mark { color: var(--color-signal-bright); }
.brand .brand-mark { color: var(--color-signal); }
.nav-links {
  display: flex; align-items: center; gap: var(--space-6);
  list-style: none; margin: 0; padding: 0; flex-wrap: wrap;
  margin-left: auto;
}
.nav-toggle {
  display: none; appearance: none; -webkit-appearance: none;
  align-items: center; gap: var(--space-2);
  background: transparent; border: var(--rule-hair) solid var(--color-concrete);
  border-radius: var(--radius-sm); padding: var(--space-2) var(--space-3);
  min-height: 44px; cursor: pointer; margin-left: auto;
}
.nav-toggle__bars { display: flex; flex-direction: column; gap: 4px; }
.nav-toggle__bars span { display: block; width: 18px; height: 2px; background: var(--color-ink); transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out); }
.nav-toggle__label {
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: .08em;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-links a {
  text-decoration: none; font-size: var(--text-sm); font-weight: 600;
  padding: var(--space-2) 0; border-bottom: var(--rule-thick) solid transparent;
  transition: border-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
  min-height: 44px; display: inline-flex; align-items: center;
}
.nav-links a:hover, .nav-links a:focus-visible { border-color: var(--color-signal); }
.nav-cta {
  background: var(--color-signal); color: var(--color-signal-ink);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm);
  font-weight: 700; font-size: var(--text-sm); text-decoration: none;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  min-height: 44px; display: inline-flex; align-items: center;
}
.nav-cta:hover, .nav-cta:focus-visible { background: var(--color-signal-bright); }
.nav-cta:active { transform: translateY(1px); }

/* ---------------------------------------------------------------------- */
/* Masthead / board header                                                */
/* ---------------------------------------------------------------------- */
.board-head {
  padding: var(--space-8) 0 var(--space-6);
  border-bottom: var(--rule-hair) solid var(--color-concrete);
}
.board-head .kicker {
  font-size: var(--text-sm); font-weight: 700; color: var(--color-signal);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: var(--space-3);
  display: block;
}
.board-head h1 {
  font-size: var(--text-display);
  max-width: 18ch;
}
.board-head .lede { font-size: var(--text-lg); color: var(--color-ink-soft); max-width: 58ch; }

/* ---------------------------------------------------------------------- */
/* Hero image band (full-bleed, duotoned photo)                           */
/* ---------------------------------------------------------------------- */
.hero-band {
  position: relative; width: 100%; aspect-ratio: 21/9; overflow: hidden;
  background: var(--color-concrete-deep);
}
.hero-band img { width: 100%; height: 100%; object-fit: cover; }
.hero-band::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, color-mix(in oklch, var(--color-concrete-deepest) 78%, transparent) 100%);
}

/* ---------------------------------------------------------------------- */
/* Gate Board — the signature ゲート通過ゲージ widget                       */
/* ---------------------------------------------------------------------- */
.gate-board {
  background: var(--color-concrete-deepest);
  color: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-7) 0;
}
.gate-board__label {
  font-size: var(--text-xs); text-transform: uppercase; letter-spacing: .1em;
  color: var(--color-concrete); margin-bottom: var(--space-3);
}
.gate-flap {
  display: flex; align-items: stretch; height: 96px; border-radius: var(--radius-md);
  overflow: hidden; background: var(--color-concrete-deep); position: relative;
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 25%, transparent);
}
.gate-flap__leaf {
  flex: 1 1 50%; background: var(--color-concrete);
  transform-origin: center left;
  transition: transform var(--dur-slow) var(--ease-in-out), background var(--dur-slow) var(--ease-in-out);
}
.gate-flap__leaf.leaf-right { transform-origin: center right; }
.gate-board[data-state="pass"] .gate-flap__leaf { background: var(--color-signal); transform: rotateY(72deg); }
.gate-board[data-state="reserve"] .gate-flap__leaf { background: var(--color-concrete); transform: rotateY(6deg); }
.gate-flap__gap {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.gate-flap__gap .num {
  font-size: var(--text-2xl); color: var(--color-paper);
  background: color-mix(in oklch, var(--color-concrete-deepest) 70%, transparent);
  padding: var(--space-1) var(--space-3); border-radius: var(--radius-sm);
}
.gate-board__readout {
  display: flex; flex-wrap: wrap; gap: var(--space-6); margin-top: var(--space-5);
}
.gate-readout {
  min-width: 140px;
}
.gate-readout__k { font-size: var(--text-xs); color: var(--color-concrete); text-transform: uppercase; letter-spacing: .06em; }
.gate-readout__v { font-size: var(--text-xl); font-weight: 700; }
.gate-board__verdict {
  margin-top: var(--space-5); padding: var(--space-4); border-radius: var(--radius-md);
  font-weight: 700; font-size: var(--text-lg);
  border-left: var(--rule-thick) solid var(--color-concrete);
}
.gate-board[data-state="pass"] .gate-board__verdict { border-left-color: var(--color-signal); color: var(--color-signal-dim); }
.gate-board[data-state="reserve"] .gate-board__verdict { border-left-color: var(--color-concrete); color: var(--color-paper); }
.gate-board[data-state="blocked"] .gate-flap__leaf { background: var(--color-ink-soft); transform: rotateY(0deg); }
.gate-board[data-state="blocked"] .gate-board__verdict { border-left-color: var(--color-ink-soft); color: var(--color-paper); }

.gate-slider-row { margin-top: var(--space-6); }
.gate-slider-row label { display: block; font-size: var(--text-sm); margin-bottom: var(--space-2); color: var(--color-concrete); }
input[type="range"] {
  width: 100%; -webkit-appearance: none; appearance: none; height: 4px; border-radius: 2px;
  background: var(--color-concrete-deep); outline-offset: 4px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--color-signal); border: 3px solid var(--color-paper);
  cursor: pointer; transition: transform var(--dur-fast) var(--ease-out);
}
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.12); }
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%; background: var(--color-signal);
  border: 3px solid var(--color-paper); cursor: pointer;
}
.gate-hedge {
  margin-top: var(--space-4); font-size: var(--text-sm); color: var(--color-concrete);
  border-top: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 20%, transparent);
  padding-top: var(--space-3);
}
.gate-hedge a { color: var(--color-signal-dim); text-decoration: underline; text-underline-offset: 2px; }

/* ---------------------------------------------------------------------- */
/* Rule table — JR oversized-luggage conditions                           */
/* ---------------------------------------------------------------------- */
.rule-table-wrap { overflow-x: auto; margin: var(--space-6) 0; border: var(--rule-hair) solid var(--color-concrete); border-radius: var(--radius-md); }
table.rule-table { width: 100%; border-collapse: collapse; min-width: 560px; font-size: var(--text-sm); }
table.rule-table th, table.rule-table td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: var(--rule-hair) solid var(--color-concrete); }
table.rule-table thead th { background: var(--color-paper-3); font-family: var(--font-display); font-weight: 700; }
table.rule-table tbody tr:last-child td { border-bottom: none; }
table.rule-table td.num { text-align: right; }

/* ---------------------------------------------------------------------- */
/* Panel grid — asymmetric (1 wide + 3 narrow), not a "3 feature" grid    */
/* ---------------------------------------------------------------------- */
.panel-rail { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-5); margin: var(--space-7) 0; }
.panel-card {
  grid-column: span 4;
  border: var(--rule-hair) solid var(--color-concrete);
  border-radius: var(--radius-md); padding: var(--space-5);
  background: var(--color-paper-2);
  text-decoration: none; color: inherit; display: block;
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.panel-card:hover, .panel-card:focus-visible { border-color: var(--color-signal); transform: translateY(-2px); }
.panel-card--lead { grid-column: span 4; background: var(--color-concrete-deepest); color: var(--color-paper); }
.panel-card--lead:hover { border-color: var(--color-signal); }
.panel-card .panel-no { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-signal); }
.panel-card h3 { font-size: var(--text-xl); margin: var(--space-2) 0 var(--space-3); }
.panel-card p { font-size: var(--text-sm); color: var(--color-ink-soft); margin-bottom: 0; }
.panel-card--lead p { color: var(--color-concrete); }
@media (min-width: 720px) {
  .panel-card--lead { grid-column: span 4; }
  .panel-card:not(.panel-card--lead) { grid-column: span 2; }
}
@media (min-width: 1000px) {
  .panel-card--lead { grid-column: span 4; }
  .panel-card:not(.panel-card--lead) { grid-column: span 4 / span 4; }
  .panel-rail { grid-template-columns: repeat(12, minmax(0,1fr)); }
  .panel-card--lead { grid-column: span 12; }
  .panel-card:not(.panel-card--lead) { grid-column: span 4; }
}

/* ---------------------------------------------------------------------- */
/* Diagnostic CTA band (asymmetric, not centered generic CTA)             */
/* ---------------------------------------------------------------------- */
.diag-band {
  display: grid; grid-template-columns: minmax(0,1fr); gap: var(--space-5);
  background: var(--color-signal-dim); border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-6); margin: var(--space-7) 0;
}
@media (min-width: 780px) {
  .diag-band { grid-template-columns: minmax(0,1.4fr) minmax(0,1fr); align-items: center; }
}
.diag-band h2 { font-size: var(--text-display-s); margin-bottom: var(--space-3); }
.diag-band p { color: var(--color-ink-soft); }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  background: var(--color-signal); color: var(--color-signal-ink); font-weight: 700;
  padding: var(--space-4) var(--space-6); border-radius: var(--radius-sm);
  text-decoration: none; min-height: 48px; font-size: var(--text-base);
  border: none; cursor: pointer;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  width: max-content; max-width: 100%;
}
.btn-primary:hover, .btn-primary:focus-visible { background: var(--color-signal-bright); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: .45; cursor: not-allowed; }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  background: transparent; color: var(--color-ink); font-weight: 600;
  padding: var(--space-3) var(--space-5); border-radius: var(--radius-sm);
  border: var(--rule-hair) solid var(--color-concrete); text-decoration: none;
  min-height: 44px; font-size: var(--text-sm); cursor: pointer;
  transition: border-color var(--dur-base) var(--ease-out);
}
.btn-secondary:hover, .btn-secondary:focus-visible { border-color: var(--color-signal); }

/* ---------------------------------------------------------------------- */
/* Product card                                                          */
/* ---------------------------------------------------------------------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--space-5); margin: var(--space-6) 0; }
.product-card {
  border: var(--rule-hair) solid var(--color-concrete); border-radius: var(--radius-md);
  background: var(--color-paper-2); overflow: hidden; display: flex; flex-direction: column;
}
.product-card__img {
  position: relative; aspect-ratio: 1/1; background: var(--color-paper-3);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  padding: var(--space-4);
}
.product-card__img img {
  width: 100%; height: 100%; object-fit: contain; background: #fff;
  padding: var(--space-3);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 12%, transparent);
  border-radius: var(--radius-sm);
}
.product-card.img-fail .product-card__img::before {
  content: "画像を準備中";
  font-size: var(--text-xs); color: var(--color-ink-soft);
  border: var(--rule-hair) dashed var(--color-concrete); border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
}
.product-card__body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.product-card__title { font-size: var(--text-sm); font-weight: 700; line-height: 1.5; }
.product-card__spec { font-size: var(--text-xs); color: var(--color-ink-soft); list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.product-card__price { font-family: var(--font-body); font-size: var(--text-sm); font-weight: 700; color: var(--color-signal); margin-top: auto; }
.product-card__price .num { font-family: var(--font-mono); }
.product-card__cta {
  display: block; text-align: center; margin: var(--space-3) var(--space-4) var(--space-4);
  background: var(--color-signal); color: var(--color-signal-ink); font-weight: 700;
  padding: var(--space-3); border-radius: var(--radius-sm); text-decoration: none;
  min-height: 44px; line-height: 1.2;
  transition: background var(--dur-base) var(--ease-out);
}
.product-card__cta:hover, .product-card__cta:focus-visible { background: var(--color-signal-bright); }
.product-card__badge { display: inline-block; font-size: var(--text-xs); font-weight: 700; color: var(--color-signal); border: var(--rule-hair) solid var(--color-signal); border-radius: var(--radius-sm); padding: 2px var(--space-2); width: max-content; }

/* ---------------------------------------------------------------------- */
/* Article body typography                                                */
/* ---------------------------------------------------------------------- */
.article-body { padding: var(--space-7) 0; }
.article-body h2 { font-size: var(--text-2xl); margin-top: var(--space-8); border-top: var(--rule-hair) solid var(--color-concrete); padding-top: var(--space-6); }
.article-body h2:first-of-type { border-top: none; padding-top: 0; margin-top: var(--space-6); }
.article-body ul, .article-body ol { padding-left: 1.2em; max-width: 62ch; }
.article-body li { margin-bottom: var(--space-2); }
.hedge-box {
  background: var(--color-paper-3); border-left: var(--rule-thick) solid var(--color-signal);
  padding: var(--space-4) var(--space-5); border-radius: var(--radius-sm); font-size: var(--text-sm);
  margin: var(--space-5) 0;
}
.byline { font-size: var(--text-sm); color: var(--color-ink-soft); margin-bottom: var(--space-6); }
.breadcrumb { font-size: var(--text-xs); color: var(--color-ink-soft); padding: var(--space-4) 0; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 2px; }
.breadcrumb ol { list-style: none; display: flex; gap: var(--space-2); padding: 0; margin: 0; flex-wrap: wrap; }
.breadcrumb li + li::before { content: "›"; margin-right: var(--space-2); color: var(--color-concrete); }

/* ---------------------------------------------------------------------- */
/* Diagnostic form + states                                               */
/* ---------------------------------------------------------------------- */
.diag-form { border: var(--rule-hair) solid var(--color-concrete); border-radius: var(--radius-lg); padding: var(--space-6); background: var(--color-paper-2); }
.diag-field { margin-bottom: var(--space-6); }
.diag-field legend, .diag-field > label {
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-base); margin-bottom: var(--space-3); display: block;
}
.diag-field .field-hint { font-size: var(--text-xs); color: var(--color-ink-soft); font-weight: 400; margin-top: var(--space-1); }
.option-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.option-chip {
  position: relative;
}
.option-chip input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.option-chip label {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
  padding: var(--space-2) var(--space-4); border: var(--rule-hair) solid var(--color-concrete);
  border-radius: var(--radius-sm); font-size: var(--text-sm); cursor: pointer; font-weight: 600;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.option-chip input:checked + label { background: var(--color-signal); border-color: var(--color-signal); color: var(--color-signal-ink); }
.option-chip input:focus-visible + label { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.option-chip label:hover { border-color: var(--color-signal); }

.stepper { display: inline-flex; align-items: center; border: var(--rule-hair) solid var(--color-concrete); border-radius: var(--radius-sm); overflow: hidden; }
.stepper button {
  min-width: 44px; min-height: 44px; border: none; background: var(--color-paper-3); cursor: pointer;
  font-size: var(--text-lg); font-family: var(--font-mono);
  transition: background var(--dur-fast) var(--ease-out);
}
.stepper button:hover { background: var(--color-signal-dim); }
.stepper button:disabled { opacity: .3; cursor: not-allowed; }
.stepper output { min-width: 48px; text-align: center; font-family: var(--font-mono); font-size: var(--text-lg); font-weight: 700; }

.diag-error {
  display: none; background: var(--color-paper-3); border: var(--rule-hair) solid var(--color-ink-soft);
  border-left: var(--rule-thick) solid var(--color-ink); color: var(--color-ink);
  padding: var(--space-4); border-radius: var(--radius-sm); font-size: var(--text-sm); margin-bottom: var(--space-5);
}
.diag-error[data-active="true"] { display: block; }

#diag-result { margin-top: var(--space-7); }

.result-skeleton { display: none; }
.result-skeleton[data-active="true"] { display: block; }
.skeleton-bar { height: 18px; border-radius: 3px; background: linear-gradient(90deg, var(--color-paper-3) 25%, var(--color-concrete) 50%, var(--color-paper-3) 75%); background-size: 200% 100%; animation: shimmer 1.2s var(--ease-in-out) infinite; margin-bottom: var(--space-3); }
.skeleton-bar.w-60 { width: 60%; }
.skeleton-bar.w-100 { width: 100%; }
.skeleton-bar.h-90 { height: 90px; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) { .skeleton-bar { animation: none; } }

.result-empty { display: none; text-align: left; padding: var(--space-6); border: var(--rule-hair) dashed var(--color-concrete); border-radius: var(--radius-md); }
.result-empty[data-active="true"] { display: block; }
.result-empty .num { font-size: var(--text-2xl); color: var(--color-concrete); }

.result-panel { display: none; }
.result-panel[data-active="true"] { display: block; }

.secondary-band {
  margin-top: var(--space-5); padding: var(--space-4); border-radius: var(--radius-md);
  border: var(--rule-hair) dashed var(--color-concrete); font-size: var(--text-sm);
}

/* ---------------------------------------------------------------------- */
/* Footer — Ft5 statement style                                           */
/* ---------------------------------------------------------------------- */
.site-footer { background: var(--color-concrete-deepest); color: var(--color-paper); margin-top: var(--space-9); }
.site-footer .wrap { padding: var(--space-8) var(--space-5) var(--space-6); }
.footer-statement { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; max-width: 24ch; margin-bottom: var(--space-6); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-5); list-style: none; padding: 0; margin: 0 0 var(--space-5); font-size: var(--text-sm); }
.footer-links a { text-decoration: underline; text-underline-offset: 2px; color: var(--color-concrete); min-height: 44px; display: inline-flex; align-items: center; }
.footer-links a:hover { color: var(--color-signal-dim); }
.footer-meta { font-size: var(--text-xs); color: var(--color-concrete); border-top: var(--rule-hair) solid color-mix(in oklch, var(--color-paper) 15%, transparent); padding-top: var(--space-4); }

/* ---------------------------------------------------------------------- */
/* 404                                                                    */
/* ---------------------------------------------------------------------- */
.notfound { padding: var(--space-9) 0; text-align: left; }
.notfound .num { font-family: var(--font-mono); font-size: 5rem; color: var(--color-signal); line-height: 1; }

/* ---------------------------------------------------------------------- */
/* Icon (line-art, single color — 駅サイン記号 style)                        */
/* ---------------------------------------------------------------------- */
.sign-icon { width: 40px; height: 40px; }
.sign-icon path, .sign-icon circle, .sign-icon rect, .sign-icon line { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------------------------------------------------------------- */
/* Responsive floor                                                      */
/* ---------------------------------------------------------------------- */
@media (max-width: 720px) {
  .board-head { padding: var(--space-6) 0 var(--space-5); }
  .gate-board { padding: var(--space-5); }
  .gate-flap { height: 76px; }
  .footer-statement { font-size: var(--text-xl); }
}

/* Mobile nav — collapse links + CTA behind a toggle so the sticky nav
   never grows past one row on narrow viewports (was: 3 wrapped rows). */
@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute; top: calc(100% + 1px); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-paper);
    border-bottom: var(--rule-hair) solid var(--color-concrete);
    padding: var(--space-3) var(--space-5) var(--space-4);
    margin-left: 0;
    box-shadow: 0 8px 16px -8px color-mix(in oklch, var(--color-ink) 20%, transparent);
  }
  .nav-links[data-open="true"] { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { width: 100%; }
  .nav-links .nav-cta { justify-content: center; margin-top: var(--space-2); }
}