/* Identity: V3 brand assets within CRT/JR station-name hierarchy. */

.rt-station-sign {
  position: relative;
  overflow: hidden;
  border: var(--rt-border-sign) solid var(--rt-color-rail);
  border-radius: var(--rt-radius-sign);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--rt-color-line) 45%, transparent) 1px, transparent 1px) 0 0 / 8rem 8rem,
    linear-gradient(0deg, color-mix(in srgb, var(--rt-color-line) 45%, transparent) 1px, transparent 1px) 0 0 / 8rem 6rem,
    var(--rt-color-paper);
  box-shadow: var(--rt-shadow-sign);
  color: var(--rt-color-ink);
}

.rt-station-sign::before,
.rt-station-sign::after {
  position: absolute;
  top: var(--rt-space-5);
  width: 2.25rem;
  height: 8rem;
  background: var(--rt-track-accent, var(--rt-v3-orange));
  content: "";
}

.rt-station-sign::before { left: 0; }
.rt-station-sign::after { right: 0; }

.rt-station-sign__main {
  display: grid;
  /* The aside track is clamped so media max-content (e.g. motion video)
     cannot squeeze the identity column into single-character lines. */
  grid-template-columns: auto minmax(0, 1fr) clamp(15rem, 26vw, 24rem);
  align-items: center;
  gap: var(--rt-space-5);
  min-height: 16rem;
  padding: var(--rt-space-6) clamp(3rem, 7vw, 5rem);
}

.rt-station-sign__code {
  display: grid;
  place-items: center;
  width: clamp(4rem, 9vw, 5.75rem);
  aspect-ratio: 1;
  border: 2px solid var(--rt-color-rail);
  border-radius: var(--rt-radius-badge);
  background: var(--rt-track-accent, var(--rt-v3-orange));
  color: var(--rt-track-accent-ink, var(--rt-v3-ink));
  font-family: var(--rt-font-data);
  font-weight: 600;
  line-height: 1;
  text-align: center;
}

.rt-station-sign__code small {
  display: block;
  font-size: var(--rt-text-small);
  letter-spacing: 0.08em;
}

.rt-station-sign__code strong {
  display: block;
  margin-top: var(--rt-space-1);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}

.rt-station-sign__identity { min-width: 0; }

.rt-station-sign__name {
  margin: 0;
  font-size: var(--rt-text-station);
  font-weight: 700;
  letter-spacing: var(--rt-tracking-station);
  line-height: var(--rt-leading-tight);
}

.rt-station-sign__wordmark {
  display: block;
  width: min(100%, 30rem);
  max-height: 12rem;
  object-fit: contain;
  object-position: left center;
}

.rt-station-sign__roman {
  margin-top: var(--rt-space-2);
  font-family: var(--rt-font-latin);
  font-size: var(--rt-text-roman);
  font-weight: 600;
  letter-spacing: var(--rt-tracking-roman);
  line-height: 1;
}

.rt-station-sign__motto {
  margin: var(--rt-space-4) 0 0;
  font-size: var(--rt-text-title);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.rt-station-sign__role {
  display: flex;
  flex-wrap: wrap;
  gap: var(--rt-space-2);
  margin-top: var(--rt-space-4);
  color: var(--rt-color-muted);
  font-size: var(--rt-text-small);
}

.rt-station-sign__role span {
  border: 1px solid var(--rt-color-line);
  background: var(--rt-color-surface);
  padding: 0.125rem var(--rt-space-2);
}

.rt-station-sign__aside {
  display: grid;
  gap: var(--rt-space-2);
  justify-items: end;
  color: var(--rt-color-muted);
  font-size: var(--rt-text-small);
  text-align: right;
}

.rt-station-sign__aside strong {
  color: var(--rt-color-ink);
  font-family: var(--rt-font-data);
  font-size: var(--rt-text-body);
}

.rt-station-sign__band {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--rt-space-4);
  min-height: 4.25rem;
  padding: var(--rt-space-2) clamp(1rem, 4vw, 2rem);
  background: var(--rt-track-accent, var(--rt-v3-orange));
  color: var(--rt-track-accent-ink, var(--rt-v3-ink));
  font-family: var(--rt-font-data);
}

.rt-station-sign__band span {
  font-size: var(--rt-text-small);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.rt-station-sign__band strong {
  font-size: var(--rt-text-body);
  letter-spacing: 0.12em;
}

.rt-station-sign__band span:last-child { text-align: right; }

.rt-profile-sign {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--rt-space-5);
  border: var(--rt-border-sign) solid var(--rt-color-rail);
  background: var(--rt-color-surface);
  padding: var(--rt-space-5);
}

.rt-profile-sign__label {
  display: inline-flex;
  align-items: center;
  gap: var(--rt-space-2);
  margin-bottom: var(--rt-space-3);
  color: var(--rt-color-muted);
  font-family: var(--rt-font-data);
  font-size: var(--rt-text-small);
  font-weight: 600;
}

.rt-profile-sign__label::before {
  width: 0.75rem;
  height: 0.75rem;
  background: var(--rt-track-accent, var(--rt-v3-orange));
  content: "";
}

.rt-profile-sign__title {
  margin: 0;
  font-size: var(--rt-text-title);
  line-height: var(--rt-leading-title);
}

.rt-profile-sign__body {
  margin: var(--rt-space-3) 0 0;
  color: var(--rt-color-muted);
}

.rt-profile-sign__mark {
  display: grid;
  place-items: center;
  width: 4.5rem;
  aspect-ratio: 1;
  background: var(--rt-color-rail);
  color: var(--rt-color-on-screen);
  font-family: var(--rt-font-data);
  font-size: var(--rt-text-title);
  font-weight: 600;
}

/* V3 assets are immutable islands: scale only, never recolor or reshape. */
.rt-brand-zone {
  border: var(--rt-border-sign) solid var(--rt-color-rail);
  background: var(--rt-v3-white);
  padding: var(--rt-space-4);
  color: var(--rt-v3-ink);
}

.rt-brand-zone__label {
  display: block;
  margin-top: var(--rt-space-3);
  font-size: var(--rt-text-small);
}

.rt-brand-asset {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.rt-brand-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--rt-space-3);
}

.rt-brand-tile {
  display: grid;
  align-content: space-between;
  gap: var(--rt-space-3);
  min-width: 0;
  border: 1px solid var(--rt-color-line);
  background: var(--rt-v3-white);
  padding: var(--rt-space-4);
  color: var(--rt-v3-ink);
}

.rt-brand-tile--inverse { background: var(--rt-v3-ink); }

.rt-brand-tile__asset {
  width: 100%;
  height: 7rem;
  object-fit: contain;
}

.rt-brand-tile__label {
  font-size: var(--rt-text-small);
  text-align: center;
}

.rt-brand-tile--inverse .rt-brand-tile__label { color: var(--rt-v3-white); }

.rt-brand-motion {
  width: var(--rt-brand-motion-size, min(100%, 30rem));
  border: 1px solid var(--rt-color-line);
  background: var(--rt-v3-white);
}

.rt-brand-motion video {
  display: block;
  width: 100%;
  height: auto;
  background: var(--rt-v3-white);
}

.rt-brand-motion__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--rt-space-3);
  padding: var(--rt-space-3);
  border-top: 1px solid var(--rt-color-line);
}

.rt-brand-motion__button {
  border: 1px solid var(--rt-color-rail);
  border-radius: 0;
  background: var(--rt-color-surface);
  padding: var(--rt-space-2) var(--rt-space-3);
  color: var(--rt-color-ink);
  cursor: pointer;
}

.rt-brand-motion__button:hover {
  background: var(--rt-track-soft, var(--rt-v3-orange-light));
}

@media (max-width: 720px) {
  .rt-station-sign__main {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: var(--rt-space-7) var(--rt-space-5) var(--rt-space-6);
  }

  /* JR East 版式（home/event 页面组合层）下旧版轨道装饰条失去锚点：
     右徽撤位后装饰条悬空压站名。收起规则上移组件层（2026-10-29 第十二轮），
     一次覆盖全部 JR 作用域，不再依赖各页面 CSS 加载与缓存状态。 */
  .home-jr-sign.rt-station-sign::before,
  .home-jr-sign.rt-station-sign::after,
  .event-jr-sign.rt-station-sign::before,
  .event-jr-sign.rt-station-sign::after {
    display: none;
  }

  .rt-station-sign__code { width: 4rem; }
  .rt-station-sign__aside { justify-items: start; text-align: left; }
  .rt-station-sign__band { grid-template-columns: 1fr; gap: var(--rt-space-1); }
  .rt-station-sign__band span:last-child { text-align: left; }
  .rt-profile-sign { grid-template-columns: 1fr; }
  .rt-brand-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rt-brand-motion { width: 100%; }
}

@media (max-width: 420px) {
  .rt-brand-gallery { grid-template-columns: 1fr; }
}