:root {
  /* Nippon Colors — https://nipponcolors.com/ */
  --wall: #fcfaf2; /* 白練 SHIRONERI */
  --ink: #1c1c1c; /* 墨 SUMI */
  --quiet: #707c74; /* 利休鼠 RIKYUNEZUMI */
  --line: #bdc0ba; /* 白鼠 SHIRONEZUMI */
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --pad: clamp(20px, 5vw, 64px);
  --measure: 38rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  background: var(--wall);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration: none;
}

:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 3px;
}

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

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--wall);
  padding: 0.4rem 0.6rem;
}

.skip:focus {
  top: 1rem;
}

/* Header — museum wordmark, not a dashboard */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem var(--pad);
  background: var(--wall);
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.wordmark:hover {
  text-decoration: underline;
}

.menu-btn {
  display: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 0.95rem;
  color: inherit;
  cursor: pointer;
}

#nav {
  display: flex;
  gap: 1.6rem;
}

#nav a {
  text-decoration: none;
  font-size: 0.95rem;
}

#nav a:hover {
  text-decoration: underline;
}

/* Images hang only when they exist */

.media {
  margin: 0;
}

.media.is-missing {
  display: none;
}

.media img {
  width: 100%;
  height: auto;
}

.media figcaption {
  margin-top: 0.55rem;
  font-size: 0.82rem;
  color: var(--quiet);
}

.media figcaption:empty {
  display: none;
}

/* Intro: object + wall text */

.intro {
  padding: 0 0 4.5rem;
  border-bottom: 1px solid var(--line);
}

.opening {
  margin: 0 0 2.5rem;
  display: flex;
  justify-content: center;
}

.opening img {
  width: auto;
  max-width: 100%;
  max-height: 88vh;
  height: auto;
  display: block;
}

.intro-text {
  padding: 0 var(--pad);
}

.intro h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.aka {
  margin-top: 0.35rem;
  color: var(--quiet);
  letter-spacing: 0.18em;
  font-size: 0.95rem;
}

.wall {
  max-width: var(--measure);
  margin-top: 1.6rem;
  font-size: 1.12rem;
  line-height: 1.5;
}

/* Chapters */

.chapter {
  padding: 4rem var(--pad) 1rem;
}

.chapter-title {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 2.5rem;
}

.chapter-lead {
  max-width: var(--measure);
  margin: -1.5rem 0 2rem;
  color: var(--quiet);
}

.entry {
  padding: 0 0 4.5rem;
}

.entry .media {
  margin-bottom: 1.25rem;
}

.entry .media img {
  max-height: 72vh;
  object-fit: contain;
  background: transparent;
}

.entry .media.diagram img {
  border: 1px solid var(--line);
  background: #fff;
}

.phones .phone-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.phones img {
  max-height: none;
  width: 100%;
  height: auto;
}

.label {
  max-width: var(--measure);
}

.work-mark {
  display: block;
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
}

.label h3 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.tombstone {
  margin: 0.45rem 0 1rem;
  font-size: 0.92rem;
  color: var(--quiet);
}

/* Gallery hang */

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem 1.25rem;
}

.gallery img {
  width: 100%;
  height: auto;
}

/* About */

.about {
  display: grid;
  gap: 2.5rem;
  padding-bottom: 4rem;
  border-top: 1px solid var(--line);
  margin-top: 2rem;
}

.about .chapter-title {
  grid-column: 1 / -1;
}

.about h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.7rem;
}

.about h3 + p + h3 {
  margin-top: 2rem;
}

.about p {
  max-width: 32rem;
}

.about p + p {
  margin-top: 1rem;
}

/* Footer */

.site-footer {
  padding: 3rem var(--pad) 4rem;
  border-top: 1px solid var(--line);
}

.footer-name {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.7rem;
}

.footer-links {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* Archive */

.archive-lead {
  max-width: var(--measure);
  padding: 3rem var(--pad) 1rem;
}

.archive-lead h1 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.archive-lead p {
  margin-top: 1rem;
  color: var(--quiet);
}

.past {
  list-style: none;
  padding: 1rem var(--pad) 4rem;
  margin: 0;
}

.past li {
  border-top: 1px solid var(--line);
}

.past a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
  text-decoration: none;
}

.past a:hover {
  text-decoration: none;
}

.past a:hover .past-title {
  text-decoration: underline;
}

.past-title {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
}

.past-year {
  color: var(--quiet);
  font-size: 0.92rem;
  padding-top: 0.3rem;
}

@media (min-width: 800px) {
  .intro-text {
    padding-top: 0.5rem;
  }

  .phones .phone-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .gallery {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .gallery .media:first-child,
  .gallery .media:last-child {
    grid-column: 1 / -1;
  }

  .about {
    grid-template-columns: 1fr 1fr;
    column-gap: 4rem;
  }
}

@media (max-width: 799px) {
  .menu-btn {
    display: block;
  }

  #nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem var(--pad) 1rem;
    background: var(--wall);
    border-bottom: 1px solid var(--line);
  }

  .site-header {
    position: sticky;
  }

  #nav.is-open {
    display: flex;
  }

  #nav a {
    padding: 0.65rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  .site-header,
  .menu-btn {
    position: static;
  }

  .menu-btn {
    display: none;
  }

  #nav {
    display: flex;
  }
}