/* 바위집 Rock House
   Tokens from the 바위집 design system (day theme, used for the website). */

:root {
  --ground: #f3eee5;
  --raised: #fbf8f2;
  --sunken: #e8dfd1;
  --hairline: #d9cdbb;
  --ink: #1f1c19;
  --ink-muted: #5a534c;
  --on-rock: #ffffff;
  --rock: #b5552f;
  --cochineal: #8a2b22;
  --ochre: #c98a4b;
  --celadon: #5e7a6b;
  --accent-text: #8a2b22;
  --focus: #1f1c19;
  --seam-opacity: 0.32;

  --serif: "Gowun Batang", "Apple SD Gothic Neo", "Noto Serif KR", Georgia, serif;
  --sans: "Jost", "Helvetica Neue", Arial, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  --radius-none: 0;
  --radius-sm: 4px;
  --radius-pill: 999px;

  --gutter: var(--space-8);
  --measure: 62ch;
  --max: 1240px;

  /* Motion: slow, small, one easing everywhere. */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-reveal: 1.1s;
  --t-img: 1.6s;
}

@media (max-width: 720px) {
  :root { --gutter: var(--space-4); }
}

/* Base */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

[id] { scroll-margin-top: 80px; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
}

img { display: block; max-width: 100%; height: auto; }

.cards > *, .rooms > *, .baths > *, .chapter > *, .chapter-photos > *, .gallery > *, .story > *, .details > * { min-width: 0; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  background: var(--ink);
  color: var(--ground);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 50;
}
.skip:focus { top: var(--space-2); }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* Type scale */

.display, .headline, .title, .quote, .serif { font-family: var(--serif); }

.display  { font-size: clamp(42px, 6vw, 64px); line-height: 1.1;  font-weight: 700; letter-spacing: 0.02em; }
.headline { font-size: clamp(32px, 4vw, 40px); line-height: 1.15; font-weight: 700; }
.title    { font-size: clamp(24px, 2.6vw, 28px); line-height: 1.25; font-weight: 700; }
.quote    { font-size: clamp(21px, 2.4vw, 24px); line-height: 1.55; font-weight: 400; }

.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.lockup-text {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
}

h1, h2, h3, p, figure { margin: 0; }

p + p { margin-top: var(--space-4); }

figcaption { margin-top: var(--space-2); font-size: 15px; line-height: 1.5; color: var(--ink-muted); }

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.2;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary, .nav a.btn-primary { background: var(--rock); border-color: var(--rock); color: var(--on-rock); }
.btn-primary:hover, .nav a.btn-primary:hover { background: var(--cochineal); border-color: var(--cochineal); color: var(--on-rock); }
.btn-secondary { background: var(--ink); border-color: var(--ink); color: var(--ground); }
.btn-tertiary  { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-tertiary:hover { background: var(--sunken); }

.link {
  color: var(--accent-text);
  font-weight: 500;
  text-decoration: none;
  position: relative;
}
.link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: currentColor;
  opacity: var(--seam-opacity);
}
.link:hover::after { opacity: 1; }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--ground);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 72px;
}

.lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--ink);
}
.lockup img, .lockup .mark { width: 28px; height: auto; }
.lockup .jar-rock { transform: translateY(32px); }

.nav { position: relative; }
.nav-seam {
  position: absolute;
  bottom: -2px;
  height: 1px;
  background: var(--rock);
  opacity: 0;
  pointer-events: none;
}
.lockup .hangul { font-family: var(--serif); font-weight: 700; font-size: 22px; line-height: 1; }
.lockup .lockup-text { padding-top: 3px; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav a:not(.btn) {
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-muted);
}
.nav a:not(.btn):hover { color: var(--ink); }
.nav .btn { margin-left: var(--space-2); min-height: 44px; padding-block: var(--space-2); }

.nav-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  font: 500 15px/1.2 var(--sans);
  color: var(--ink);
}

@media (max-width: 860px) {
  .lockup .lockup-text { display: none; }
  .nav-toggle { display: inline-block; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--raised);
    border-bottom: 1px solid var(--hairline);
    padding: var(--space-2) var(--gutter) var(--space-6);
  }
  .nav.open { display: flex; }
  .nav a:not(.btn) {
    width: 100%;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--hairline);
    font-size: 17px;
  }
  .nav .btn { margin: var(--space-4) 0 0; }
  .nav-seam { display: none; }
}

/* Sections */

.section { padding-block: var(--space-24); }
.section + .section { padding-top: 0; }
.section-raised { background: var(--raised); }
.section-raised + .section { padding-top: var(--space-24); }

.section-heading { margin-bottom: var(--space-12); }
.section-heading .eyebrow { margin-bottom: var(--space-4); }
.section-heading .headline { max-width: 22ch; }
.section-heading p { margin-top: var(--space-4); max-width: var(--measure); color: var(--ink-muted); }

@media (max-width: 720px) {
  .section { padding-block: var(--space-16); }
  .section-raised + .section { padding-top: var(--space-16); }
}

/* Hero */

.hero { padding-top: var(--space-8); }
.hero-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-12);
  align-items: center;
}
.hero-text { min-width: 0; }
.hero .eyebrow { margin-bottom: var(--space-6); }
.hero .display { max-width: 12ch; }
.hero p.lede {
  margin-top: var(--space-6);
  max-width: 42ch;
  font-size: 18px;
  color: var(--ink-muted);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}
.hero-photo {
  min-width: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  max-height: calc(100vh - 160px);
}
.hero-photo img { width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 960px) {
  .hero { padding-top: 0; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .hero-photo { order: -1; aspect-ratio: 4 / 3; max-height: 60vh; margin-inline: calc(-1 * var(--gutter)); border-radius: 0; }
  .hero .display { max-width: none; }
}

/* Skyline divider: the one decorative device, used once. */

.skyline {
  display: block;
  width: 100%;
  height: 60px;
  margin-top: var(--space-16);
}

/* Greeting */

.greeting {
  text-align: center;
  padding-block: var(--space-16) var(--space-24);
}
.greeting .eyebrow { margin-bottom: var(--space-4); }
.greeting .hangul-line { font-family: var(--serif); font-size: clamp(28px, 4vw, 36px); line-height: 1.3; font-weight: 400; }
.greeting .sub { margin-top: var(--space-2); font-family: var(--serif); font-size: 19px; }
.greeting .rule {
  width: 28px;
  height: 2px;
  background: var(--rock);
  margin: var(--space-6) auto 0;
}

/* A day at the house: chapters */

.day { padding-block: var(--space-24) var(--space-24); }

.chapter {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: var(--space-12) var(--space-16);
  align-items: start;
  padding-top: var(--space-16);
  margin-top: var(--space-16);
  border-top: 1px solid var(--hairline);
}
.chapter.flip .chapter-text { order: 2; }
.chapter.flip .chapter-photos { order: 1; }

.chapter-text { position: sticky; top: 104px; }
.chapter-text .eyebrow { margin-bottom: var(--space-4); }
.chapter-text .title { max-width: 18ch; }
.chapter-text .title + p { margin-top: var(--space-6); }
.chapter-text p { max-width: 36ch; font-size: 18px; }

.chapter-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.chapter-photos figure { min-width: 0; }
.chapter-photos .large { grid-column: 1 / -1; }
.chapter-photos img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-sm); }
.chapter-photos .large img { aspect-ratio: 16 / 9; }
.chapter-photos figure:not(.large):not(.tall) img { aspect-ratio: 4 / 3; }
.chapter-photos .tall { grid-column: 1 / -1; }
.chapter-photos .tall img { aspect-ratio: 16 / 10; object-position: center 72%; }

/* Evening: the night theme, used for this one surface. */

.night {
  position: relative;
  background: #1f1c19;
  color: #f3eee5;
  overflow: hidden;
  padding-block: var(--space-24);
}
.night .stars {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}
.night .wrap { position: relative; }
.night .chapter { border-top: 0; margin-top: 0; padding-top: 0; }
.night .eyebrow { color: #cfc5b6; }
.night .title { color: #f3eee5; }
.night p { color: #cfc5b6; }
.night figcaption { color: #cfc5b6; }
.night .chapter-text { top: 104px; }

.day-continued { padding-top: 0; }
.day-continued .rooms-chapter { border-top: 0; margin-top: 0; padding-top: var(--space-24); }

@media (max-width: 720px) {
  .night { padding-block: var(--space-16); }
  .day-continued .rooms-chapter { padding-top: var(--space-16); }
}

.rooms-chapter { grid-template-columns: 1fr; }
.rooms-chapter .chapter-text { position: static; }
.rooms-chapter .chapter-text p { max-width: var(--measure); }

@media (max-width: 960px) {
  .chapter { grid-template-columns: 1fr; gap: var(--space-8); padding-top: var(--space-12); margin-top: var(--space-12); }
  .chapter.flip .chapter-text { order: 1; }
  .chapter.flip .chapter-photos { order: 2; }
  .chapter-text { position: static; }
}
@media (max-width: 560px) {
  .chapter-photos { grid-template-columns: 1fr; }
}

/* Rooms */

.rooms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
}
.room .photo {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3 / 2;
}
.room .photo img { width: 100%; height: 100%; object-fit: cover; }

.room-sign {
  margin-top: var(--space-4);
  background: var(--ink);
  color: var(--ground);
  padding: var(--space-6);
  border-radius: var(--radius-none);
}
.room-sign .hangul { font-family: var(--serif); font-size: 26px; line-height: 1.2; font-weight: 400; }
.room-sign .en { font-family: var(--serif); font-size: 19px; margin-top: var(--space-1); }
.room-sign .rule { width: 28px; height: 2px; background: var(--rock); margin-top: var(--space-3); }
.room-sign .eyebrow { margin-top: var(--space-3); color: #cfc5b6; }
.room p.note { margin-top: var(--space-3); font-size: 15px; color: var(--ink-muted); }

.baths {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-top: var(--space-12);
}
.baths img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--radius-sm); }

@media (max-width: 860px) {
  .rooms { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .baths { grid-template-columns: 1fr; }
}

/* Gallery */

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  grid-auto-flow: dense;
  gap: var(--space-3);
}
.gallery a {
  display: block;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--sunken);
}
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.gallery .tall { grid-row: span 2; }
.gallery .wide { grid-column: span 2; }

@media (max-width: 860px) {
  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 180px; }
}

/* Lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(31, 28, 25, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.lightbox.open { opacity: 1; visibility: visible; pointer-events: auto; }
.lightbox img { max-width: 100%; max-height: 90vh; width: auto; height: auto; border-radius: var(--radius-sm); }
.lightbox button {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--ground);
  color: var(--ink);
  border: 0;
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  font: 500 15px/1.2 var(--sans);
  cursor: pointer;
}
.lightbox .nav-btn {
  top: 50%;
  transform: translateY(-50%);
  right: auto;
  left: var(--space-4);
}
.lightbox .nav-btn.next { left: auto; right: var(--space-4); }

/* Story band */

.story-band {
  background: var(--ink);
  color: var(--ground);
}
.story-band .wrap {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-12);
  align-items: center;
  padding-block: var(--space-16);
}
.story-band img { width: 120px; margin: 0 auto; }
.story-band .eyebrow { color: #cfc5b6; margin-bottom: var(--space-4); }
.story-band .quote { max-width: 34ch; }
.story-band .sig { margin-top: var(--space-6); font-size: 15px; color: #cfc5b6; }

@media (max-width: 720px) {
  .story-band .wrap { grid-template-columns: 1fr; gap: var(--space-8); }
  .story-band img { margin: 0; width: 88px; }
}

/* Story */

.story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12) var(--space-16);
}
.story .photo { border-radius: var(--radius-sm); overflow: hidden; align-self: start; position: sticky; top: 104px; }
.story .photo img { width: 100%; height: auto; }
.story h3 { font-family: var(--serif); font-size: 24px; font-weight: 700; line-height: 1.3; }
.story h3 + p { margin-top: var(--space-3); }
.story .block + .block { margin-top: var(--space-8); }

@media (max-width: 860px) {
  .story { grid-template-columns: 1fr; }
  .story .photo { position: static; }
}

/* Nearby: list on the left, the matching photograph on the right. */

.trails {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}
.trail-list { border-top: 1px solid var(--hairline); }
.trail {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  padding: var(--space-4) var(--space-3) var(--space-4) var(--space-4);
  font: inherit;
  color: inherit;
  cursor: pointer;
  position: relative;
}
.trail::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-4);
  bottom: var(--space-4);
  width: 2px;
  background: var(--rock);
  opacity: 0;
}
.trail::before { transform: scaleY(0); transform-origin: top; }
.trail.is-active::before { opacity: 1; transform: scaleY(1); }
.trail .name { display: block; font-weight: 500; color: var(--ink); }
.trail .name small { display: block; font-weight: 400; color: var(--ink-muted); font-size: 15px; margin-top: 2px; }
.trail .desc {
  display: block;
  color: var(--ink-muted);
  font-size: 15px;
  line-height: 1.5;
  margin-top: var(--space-2);
}
.trail:not(.is-active) .desc { display: none; }
.trail:hover .name { color: var(--rock); }

.trail-photo {
  position: sticky;
  top: 104px;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--sunken);
}
.trail-photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.trail-photo img.is-entering { opacity: 0; }
.trail-photo img.is-leaving { z-index: 0; }
.trail-photo img:not(.is-leaving) { z-index: 1; }

@media (max-width: 860px) {
  .trails { grid-template-columns: 1fr; gap: var(--space-6); }
  .trail-photo { position: relative; top: auto; order: -1; }
}

.nearby-note { margin-top: var(--space-6); font-size: 15px; color: var(--ink-muted); max-width: var(--measure); }

/* Final CTA */

.cta { background: var(--sunken); }
.cta .wrap {
  padding-block: var(--space-16);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-8);
  align-items: center;
}
.cta .headline { max-width: 18ch; }
.cta p { margin-top: var(--space-3); color: var(--ink-muted); max-width: 46ch; }
.cta-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }

@media (max-width: 720px) {
  .cta .wrap { grid-template-columns: 1fr; }
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--hairline);
  padding-block: var(--space-12);
  font-size: 15px;
  color: var(--ink-muted);
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-8);
  align-items: start;
}
.stacked {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--ink);
  text-decoration: none;
}
.stacked img { width: 44px; }
.stacked .hangul { font-family: var(--serif); font-weight: 700; font-size: 20px; line-height: 1; }
.stacked .lockup-text { font-size: 11px; }
.site-footer p + p { margin-top: var(--space-2); }
.site-footer .right { text-align: right; }
.site-footer a:not(.stacked) { color: var(--ink-muted); }

@media (max-width: 720px) {
  .site-footer .wrap { grid-template-columns: 1fr; }
  .site-footer .right { text-align: left; }
}

/* Motion
   One opening sequence, then quiet reveals as the page is read.
   Everything here is inside the no-preference query, so with reduced
   motion the page simply renders in its final state. */

@media (prefers-reduced-motion: no-preference) {

  /* Opening: the photo settles, the words rise once. */
  .hero-photo img {
    animation: hero-settle 1.8s var(--ease) both, hero-drift 28s ease-in-out 1.8s infinite alternate;
    transform-origin: 50% 60%;
  }
  @keyframes hero-settle {
    from { opacity: 0; transform: scale(1.06); }
    to   { opacity: 1; transform: scale(1); }
  }
  @keyframes hero-drift {
    from { transform: scale(1); }
    to   { transform: scale(1.035); }
  }
  .hero-text > * { animation: rise 1s var(--ease) both; }
  .hero-text > :nth-child(1) { animation-delay: 0.25s; }
  .hero-text > :nth-child(2) { animation-delay: 0.4s; }
  .hero-text > :nth-child(3) { animation-delay: 0.55s; }
  .hero-text > :nth-child(4) { animation-delay: 0.7s; }
  .skyline { animation: rise 1.2s var(--ease) 0.9s both; }
  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: none; }
  }

  /* Reading: blocks rise 14px once as they enter. */
  [data-reveal], [data-reveal-group] > * {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity var(--t-reveal) var(--ease), transform var(--t-reveal) var(--ease);
  }
  [data-reveal].in, [data-reveal-group].in > * { opacity: 1; transform: none; }
  [data-reveal-group].in > :nth-child(2) { transition-delay: 0.1s; }
  [data-reveal-group].in > :nth-child(3) { transition-delay: 0.2s; }
  [data-reveal-group].in > :nth-child(4) { transition-delay: 0.3s; }
  [data-reveal-group].in > :nth-child(5) { transition-delay: 0.4s; }
  [data-reveal-group].in > :nth-child(n+6) { transition-delay: 0.5s; }

  /* Photographs: a slow mask lifts while the image eases to rest. */
  [data-reveal-img] {
    clip-path: inset(0 0 14% 0);
    transition: clip-path var(--t-img) var(--ease);
  }
  [data-reveal-img] img {
    transform: scale(1.05);
    transition: transform var(--t-img) var(--ease);
  }
  [data-reveal-img].in { clip-path: inset(0); }
  [data-reveal-img].in img { transform: none; }
  .chapter-photos figure:nth-child(2) { transition-delay: 0.15s; }
  .chapter-photos figure:nth-child(2) img { transition-delay: 0.15s; }
  .chapter-photos figure:nth-child(3) { transition-delay: 0.3s; }
  .chapter-photos figure:nth-child(3) img { transition-delay: 0.3s; }
  [data-reveal-img] figcaption {
    opacity: 0;
    transition: opacity 0.8s var(--ease) 0.6s;
  }
  [data-reveal-img].in figcaption { opacity: 1; }

  /* Nearby: the photograph crossfades and the description unfolds. */
  .trail-photo img { transition: opacity 0.9s var(--ease), transform 1.4s var(--ease); }
  .trail-photo img.is-leaving { opacity: 0; }
  .trail-photo img.is-entering { opacity: 0; transform: scale(1.03); }
  .trail::before { transition: opacity 0.5s var(--ease); }
  .trail .name { transition: color 0.35s var(--ease); }

  /* Micro-interactions, each built from a brand motif. */

  /* The jar fills with rock as the page is read (driven by script). */
  .lockup .jar-rock { transition: transform 0.6s var(--ease); }

  /* A seam slides under the section you are in. */
  .nav-seam { transition: left 0.5s var(--ease), width 0.5s var(--ease), opacity 0.4s var(--ease); }
  .nav-seam.is-on { opacity: 1; }

  /* Seam under a link goes solid. */
  .link::after { transition: opacity 0.4s var(--ease); }

  /* A sign's rule extends across it. */
  .room-sign .rule { transition: width 0.7s var(--ease); }
  .room:hover .room-sign .rule, .room:focus-within .room-sign .rule { width: 100%; }

  /* The trail bar draws in from the top. */
  .trail::before { transition: transform 0.45s var(--ease), opacity 0.3s var(--ease); }

  /* Rules draw in on reveal. */
  .greeting .rule, .story-band .sig::before { transform: scaleX(0); transition: transform 0.9s var(--ease) 0.5s; }
  .greeting .in .rule { transform: scaleX(1); }
  .story-band .sig { position: relative; padding-top: var(--space-4); }
  .story-band .sig::before { content: ""; position: absolute; left: 0; top: 0; width: 28px; height: 2px; background: var(--rock); transform-origin: left; }
  .story-band .in .sig::before { transform: scaleX(1); }

  /* Buttons press. */
  .btn:active { transform: translateY(0) scale(0.985); }

  /* Lightbox pages slide the way you are going. */
  .lightbox img.slide-in { transition: none; }

  /* Touch: buttons and tiles answer slowly. */
  .btn { transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease), transform 0.35s var(--ease); }
  .btn:hover { transform: translateY(-1px); }
  .nav a:not(.btn) { transition: color 0.35s var(--ease); }
  .gallery a { overflow: hidden; }
  .gallery img { transition: transform 1.4s var(--ease); }
  .gallery a:hover img, .gallery a:focus-visible img { transform: scale(1.04); }
  .lightbox { transition: opacity 0.4s var(--ease), visibility 0s linear 0.4s; }
  .lightbox.open { transition: opacity 0.4s var(--ease), visibility 0s; }
  .lightbox img { transform: scale(0.985); transition: transform 0.5s var(--ease); }
  .lightbox.open img { transform: none; }
}