/*
  YAMANOTE LOOP — the line that circles the whole site.
  Every page rides this line for its shared look. Page-specific styling
  lives inside that page's own <style> block, not here — this file only
  holds what every stop on the loop has in common: tokens, reset, and
  the shared component set (kaisatsu/nav, homu/sections, footer, board).

  Named for the Yamanote Line because, like it, this file loops around
  and touches every page on the site without exception.
*/

/* ---------- 1. TOKENS ---------- */
:root {
  /* colour: pulled straight from the Awesome Tokyo mark */
  --sumi:        #1b1a18;   /* ink black — brush strokes, primary text   */
  --sumi-soft:   #3a3835;   /* softened ink — secondary text             */
  --hinomaru:    #c8272b;   /* rising-sun red — the one accent that shouts */
  --hinomaru-deep: #9e1c1f; /* pressed / hover state for red             */
  --washi:       #faf8f3;   /* paper white — page background             */
  --washi-dim:   #f1ede3;   /* slightly toned paper — card backgrounds   */
  --fog:         #cdc9bf;   /* cloud grey from the skyline — hairlines   */
  --fog-dim:     #e5e2d8;
  --aizome:      #223a5e;   /* indigo dye blue — links, calm accent      */
  --aizome-soft: #4c6288;

  /* the line-colour palette — used as rotating accents for district/guide
     pages, each page picks one via --line on its own <style> block */
  --line-yamanote: #80c241;
  --line-marunouchi: #e2231a;
  --line-ginza:    #f39700;
  --line-hibiya:   #838992;
  --line-tozai:    #009bbf;
  --line-chiyoda:  #00a650;
  --line-hanzomon: #8f76d6;
  --line-namboku:  #00ac9b;
  --line-asakusa:  #e85298;
  --line-oedo:     #b6007a;

  --type-display: "Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --type-body: "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
  --type-mono: "JetBrains Mono", ui-monospace, monospace;

  --edge: 2px solid var(--sumi);
  --edge-soft: 1px solid var(--fog);
  --radius: 2px; /* almost square — a departure board doesn't round its corners */

  --rail: 1180px; /* max content width, named for the tracks */
  --gauge: clamp(1rem, 2.4vw, 2rem); /* the site's one spacing unit, scales with viewport */
}

/* ---------- 2. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--washi);
  color: var(--sumi);
  font-family: var(--type-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-family: var(--type-display); font-weight: 700; }
p { margin: 0; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

/* visible keyboard focus everywhere — never suppressed */
:focus-visible {
  outline: 3px solid var(--hinomaru);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- 3. LAYOUT PRIMITIVES ---------- */
.homu {                 /* "homu" = platform. every section sits on one. */
  width: min(100% - (var(--gauge) * 2), var(--rail));
  margin-inline: auto;
}
.homu--wide { max-width: 1400px; }
.stack { display: flex; flex-direction: column; }
.stack > * + * { margin-top: var(--stack-gap, var(--gauge)); }

/* ---------- 4. KAISATSU — the ticket gate / site header ---------- */
.kaisatsu {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--washi);
  border-bottom: var(--edge);
}
.kaisatsu__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gauge);
  padding-block: 0.9rem;
}
.kaisatsu__mark {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--type-display);
  font-weight: 700;
  font-size: 1.35rem;
  white-space: nowrap;
}
.kaisatsu__mark em {
  font-style: normal;
  color: var(--hinomaru);
}
.kaisatsu__lines {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
  font-weight: 600;
}
.kaisatsu__lines a {
  position: relative;
  padding-block: 0.2rem;
}
.kaisatsu__lines a[aria-current="page"] { color: var(--hinomaru); }
.kaisatsu__lines a:not([aria-current="page"]):hover { color: var(--aizome); }
.kaisatsu__lang {
  position: relative;
}
.kaisatsu__lang > button {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border: var(--edge-soft);
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius);
}
.kaisatsu__lang > button:hover { border-color: var(--sumi); }
.kaisatsu__lang-panel {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  background: var(--washi);
  border: var(--edge);
  min-width: 220px;
  padding: 0.4rem;
  box-shadow: 6px 6px 0 var(--fog);
}
.kaisatsu__lang-panel.is-open { display: grid; grid-template-columns: 1fr 1fr; gap: 0.15rem; }
.kaisatsu__lang-panel a {
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  border-radius: var(--radius);
}
.kaisatsu__lang-panel a:hover { background: var(--washi-dim); }
.kaisatsu__burger {
  display: none;
  border: var(--edge-soft);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius);
}

@media (max-width: 860px) {
  .kaisatsu__lines {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--washi);
    border-bottom: var(--edge);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }
  .kaisatsu__lines.is-open { display: flex; }
  .kaisatsu__lines a { padding: 0.7rem var(--gauge); display: block; }
  .kaisatsu__burger { display: block; }
  .kaisatsu { position: relative; }
}

/* ---------- 5. DEPARTURE BOARD — the homepage signature ---------- */
.board {
  border: var(--edge);
  background: var(--sumi);
  color: var(--washi);
  font-family: var(--type-mono);
}
.board__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem var(--gauge);
  border-bottom: 1px solid var(--sumi-soft);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fog);
}
.board__clock { color: var(--hinomaru); }
.board__row {
  display: grid;
  grid-template-columns: 4.5rem 1fr 8rem;
  gap: 1rem;
  align-items: center;
  padding: 0.85rem var(--gauge);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
}
.board__row:last-child { border-bottom: none; }
.board__platform { color: var(--fog); font-size: 0.85rem; }
.board__dest {
  font-family: var(--type-display);
  font-size: clamp(1rem, 2.4vw, 1.4rem);
  letter-spacing: 0.02em;
}
.board__status {
  text-align: right;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.board__status--open { color: #7fd858; }
.board__status--soon { color: var(--fog); }
.board a.board__row { transition: background 120ms ease; }
.board a.board__row:hover,
.board a.board__row:focus-visible { background: rgba(255,255,255,0.06); }
.flip { display: inline-block; }
.flip.is-flipping { animation: flipch 260ms ease; }
@keyframes flipch {
  0% { transform: rotateX(0deg); opacity: 1; }
  49% { transform: rotateX(90deg); opacity: 0.2; }
  50% { transform: rotateX(-90deg); opacity: 0.2; }
  100% { transform: rotateX(0deg); opacity: 1; }
}

/* ---------- 6. CARDS ---------- */
.card {
  border: var(--edge-soft);
  background: var(--washi);
  padding: var(--gauge);
  transition: border-color 150ms ease, transform 150ms ease;
}
.card:hover { border-color: var(--sumi); transform: translateY(-2px); }
.card__eyebrow {
  font-family: var(--type-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--line, var(--hinomaru));
}
.card__title { font-size: 1.3rem; margin-top: 0.35rem; }
.card__body { margin-top: 0.5rem; color: var(--sumi-soft); font-size: 0.95rem; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--fog);
  border: var(--edge-soft);
}
.card-grid .card { border: none; background: var(--washi); }

/* ---------- 7. TYPOGRAPHY HELPERS ---------- */
.eyebrow {
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--line, var(--hinomaru));
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.eyebrow::before { content: ""; width: 1.4rem; height: 2px; background: currentColor; }
h1.headline {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.05;
  margin-top: 0.6rem;
  max-width: 18ch;
}
.lede { font-size: 1.15rem; color: var(--sumi-soft); max-width: 62ch; margin-top: 1rem; }
.rule { border: none; border-top: var(--edge-soft); margin: 0; }

/* ---------- 8. BUTTONS ---------- */
.ticket {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: var(--edge);
  padding: 0.75rem 1.3rem;
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--sumi);
  color: var(--washi);
  border-radius: var(--radius);
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.ticket:hover { box-shadow: 4px 4px 0 var(--hinomaru); transform: translate(-2px, -2px); }
.ticket--ghost { background: transparent; color: var(--sumi); }

/* ---------- 9. SECTION SCAFFOLDING used across guide/district pages ---------- */
.route {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}
.route + .route { border-top: var(--edge-soft); }
.route--sumi { background: var(--sumi); color: var(--washi); }
.route--sumi .eyebrow { color: var(--line, var(--hinomaru)); }
.info-list { display: grid; gap: 0.9rem; }
.info-list__row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: var(--edge-soft);
  font-size: 0.95rem;
}
.info-list__row dt { font-weight: 700; font-family: var(--type-mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--sumi-soft); }
.tag {
  display: inline-block;
  border: 1px solid currentColor;
  color: var(--line, var(--aizome));
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin: 0 0.35rem 0.35rem 0;
}

/* ---------- 10. FOOTER ---------- */
.terminus {
  background: var(--sumi);
  color: var(--fog);
  padding-block: 3.5rem 2rem;
  margin-top: 5rem;
}
.terminus a:hover { color: var(--washi); }
.terminus__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 2rem;
}
.terminus__head {
  color: var(--washi);
  font-family: var(--type-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}
.terminus__grid a, .terminus__grid span { display: block; font-size: 0.88rem; padding-block: 0.3rem; }
.terminus__base {
  border-top: 1px solid var(--sumi-soft);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.78rem;
}

/* ---------- 11. MEDIA — hero banners + 4:5 figures ----------
   Images aren't uploaded yet. Every <img> here points at a .webp
   that may not exist; onerror swaps it for images/pixel.gif and
   flags the wrapper as a placeholder so it reads as "coming soon"
   rather than a broken-image icon. */
.media-hero, .media-45 {
  position: relative;
  overflow: hidden;
  background: var(--washi-dim);
}
.media-hero img, .media-45 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-hero { aspect-ratio: 3 / 1; border-bottom: var(--edge); }
.media-45 { aspect-ratio: 4 / 5; border: var(--edge-soft); }
.media-hero.is-placeholder::after,
.media-45.is-placeholder::after {
  content: "Photo coming soon";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--type-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fog);
  text-align: center;
  padding: 1rem;
}

/* ---------- 12. 404 / EMPTY STATE ---------- */
.derailed {
  text-align: center;
  padding-block: clamp(4rem, 12vw, 8rem);
}
.derailed__code {
  font-family: var(--type-mono);
  font-size: clamp(3rem, 10vw, 6rem);
  color: var(--hinomaru);
  line-height: 1;
}