:root {
  color-scheme: light;
  --ink: #171714;
  --muted: #65625b;
  --paper: #f6f2e9;
  --paper-strong: #fffdf7;
  --line: #cbc5b9;
  --accent: #e3563e;
  --accent-dark: #9f2f1f;
  --blue: #b7dce2;
  --yellow: #f1d87a;
  --dark: #1d1e1c;
  --dark-soft: #2a2b28;
  --warning: #b53a28;
  --radius: 20px;
  --page-gutter: clamp(18px, 4.2vw, 72px);
  --max-width: 1600px;
  --focus: 3px solid #146c80;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

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

html {
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23, 23, 20, 0.035) 1px, transparent 1px) 0 0 / 8.333vw 100%,
    var(--paper);
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
select,
input[type="range"] {
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.62;
}

a {
  color: inherit;
}

img,
canvas {
  display: block;
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: 8px;
  color: #fff;
  background: var(--ink);
}

.skip-link:focus {
  transform: translateY(0);
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 22px var(--page-gutter);
  border-bottom: 1px solid var(--line);
}

.masthead__brand {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.masthead__status,
.eyebrow {
  margin: 0;
  font-size: 0.71rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  line-height: 1.45;
  text-transform: uppercase;
}

.masthead__status {
  color: var(--muted);
}

main {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: clamp(32px, 6vw, 112px);
  align-items: end;
  min-height: min(760px, 83svh);
  padding: clamp(64px, 10vw, 150px) var(--page-gutter) clamp(70px, 9vw, 128px);
}

.hero__copy {
  max-width: 820px;
}

.floor-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: center;
  margin: 18px 0 0;
  padding: 0 0 13px;
  border-bottom: 1px solid var(--line);
}

.floor-selector a,
.floor-selector span {
  display: inline-grid;
  min-width: 44px;
  min-height: 44px;
  padding: 5px 1px;
  place-items: center;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.floor-selector a:hover,
.floor-selector a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--accent-dark);
}

.floor-selector a[aria-current="page"],
.floor-selector span[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: currentColor;
}

.hero h1 {
  margin: 18px 0 34px;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(3.4rem, 8.8vw, 8.4rem);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 0.92;
}

.hero h1 span {
  display: inline-grid;
  width: 2.05em;
  height: 2.05em;
  place-items: center;
  margin-right: 0.08em;
  border-radius: 50%;
  color: var(--paper-strong);
  background: var(--accent);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.32em;
  font-weight: 800;
  letter-spacing: 0;
  vertical-align: 0.32em;
}

.hero__lead {
  max-width: 46em;
  margin: 0;
  font-size: clamp(1rem, 1.4vw, 1.22rem);
  line-height: 2;
}

.hero--gallery-first {
  min-height: min(680px, 76svh);
  padding-top: clamp(56px, 7vw, 106px);
  padding-bottom: clamp(60px, 7vw, 104px);
}

.hero--gallery-first h1 {
  font-size: clamp(3.4rem, 8vw, 7.7rem);
}

.hero__entry-link {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding-bottom: 7px;
  border-bottom: 1px solid currentColor;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 750;
  text-decoration: none;
}

.hero__entry-link span {
  color: var(--accent-dark);
  font-size: 1.1em;
}

.venue-facts {
  padding: clamp(24px, 3vw, 42px);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: rgba(255, 253, 247, 0.8);
}

.venue-facts__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.venue-facts h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.venue-facts__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
}

.venue-facts__grid > div {
  padding: 20px 12px 20px 0;
  border-bottom: 1px solid var(--line);
}

.venue-facts__grid > div:nth-child(even) {
  padding-right: 0;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.venue-facts dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.venue-facts dd {
  margin: 3px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.12rem, 1.6vw, 1.42rem);
  font-variant-numeric: tabular-nums;
  line-height: 1.35;
}

.provisional-note {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.75;
}

.provisional-note span {
  display: inline-block;
  margin-right: 7px;
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--ink);
  background: var(--yellow);
  font-weight: 750;
}

.planning-section,
.results-section,
.source-section {
  padding: clamp(72px, 9vw, 136px) var(--page-gutter);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(340px, 1.2fr);
  gap: clamp(30px, 7vw, 120px);
  align-items: end;
  margin-bottom: clamp(36px, 5vw, 72px);
}

.section-heading h2,
.source-section h2 {
  margin: 10px 0 0;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4.2vw, 4.5rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.section-heading > p,
.section-heading > div:last-child,
.source-section__body {
  max-width: 52em;
  margin: 0;
}

.planning-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(24px, 4vw, 58px);
  align-items: start;
}

.control-panel,
.allocation-overview {
  padding: clamp(22px, 3.5vw, 42px);
  border-radius: var(--radius);
}

.control-panel {
  border: 1px solid var(--ink);
  background: var(--paper-strong);
}

.control-panel__group + .control-panel__group,
.control-panel__row,
.control-panel__actions,
.method-note {
  margin-top: 28px;
}

.control-panel__group label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 0.88rem;
  font-weight: 750;
}

.control-panel__group label small {
  color: var(--muted);
  font-weight: 500;
}

.number-field {
  display: flex;
  align-items: center;
  gap: 14px;
}

.number-field span,
.field-note,
.method-note {
  color: var(--muted);
  font-size: 0.78rem;
}

.number-field input {
  width: 116px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
}

input[type="number"],
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

input[type="number"],
select {
  min-height: 52px;
  padding: 8px 13px;
}

textarea {
  min-height: 132px;
  padding: 13px 15px;
  line-height: 1.65;
  resize: vertical;
}

.field-note,
.method-note {
  margin-bottom: 0;
  line-height: 1.7;
}

.optional-tools {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.optional-tools > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 62px;
  padding: 14px 0;
  cursor: pointer;
  list-style-position: inside;
}

.optional-tools > summary strong {
  font-size: 0.9rem;
}

.optional-tools > summary strong::after {
  margin-left: 0.45em;
  color: var(--accent-dark);
  content: "＋";
}

.optional-tools[open] > summary strong::after {
  content: "−";
}

.optional-tools > summary span {
  padding: 3px 9px;
  border-radius: 999px;
  color: var(--muted);
  background: var(--paper);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.05em;
}

.optional-tools__body {
  padding: 6px 0 28px;
}

.optional-tools__body > :first-child {
  margin-top: 0;
}

.control-panel__row {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 24px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

output {
  min-width: 3.5em;
  color: var(--accent-dark);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.control-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.primary-button,
.secondary-button {
  min-height: 50px;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.87rem;
  font-weight: 750;
  line-height: 1.35;
}

.primary-button {
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
}

.secondary-button {
  border: 1px solid var(--ink);
  background: transparent;
}

.primary-button:hover {
  background: var(--accent-dark);
}

.secondary-button:hover {
  background: rgba(23, 23, 20, 0.07);
}

.allocation-overview {
  color: var(--paper-strong);
  background: var(--dark);
}

.allocation-overview__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid #4b4c47;
}

.allocation-overview h3 {
  margin: 0;
  font-size: 1rem;
}

.wall-summary {
  margin: 0;
  padding: 0;
  list-style: none;
}

.wall-summary__item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 18px;
  padding: 16px 0;
  border-bottom: 1px solid #4b4c47;
}

.wall-summary__title,
.wall-summary__count {
  font-size: 0.9rem;
}

.wall-summary__count {
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.wall-summary__meta {
  grid-column: 1 / -1;
  color: #afafa9;
  font-size: 0.73rem;
}

.allocation-overview__note {
  margin: 20px 0 0;
  color: #c4c3bd;
  font-size: 0.78rem;
}

.scene-section {
  padding: clamp(72px, 9vw, 136px) var(--page-gutter);
  color: var(--paper-strong);
  background: var(--dark);
}

.section-heading--dark {
  border-color: #494a46;
}

.section-heading--dark > p {
  color: #c1c0ba;
}

.scene-shell {
  position: relative;
  min-height: clamp(520px, 66vw, 820px);
  overflow: hidden;
  border: 1px solid #5a5b55;
  border-radius: var(--radius);
  background: #d9d5cd;
  isolation: isolate;
}

.scene-canvas,
.gallery-webgl {
  width: 100%;
  height: 100%;
}

.scene-canvas {
  position: absolute;
  inset: 0;
}

.gallery-webgl {
  touch-action: none;
}

.scene-status {
  position: absolute;
  z-index: 4;
  top: 16px;
  left: 16px;
  max-width: min(34em, calc(100% - 32px));
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  color: #fff;
  background: rgba(23, 23, 20, 0.78);
  font-size: 0.73rem;
  line-height: 1.4;
  backdrop-filter: blur(8px);
}

.scene-fallback {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 28px;
  color: var(--ink);
  background:
    linear-gradient(125deg, rgba(183, 220, 226, 0.88), rgba(246, 242, 233, 0.9)),
    var(--paper);
}

.scene-fallback::before,
.scene-fallback::after {
  position: absolute;
  border: 1px solid rgba(23, 23, 20, 0.32);
  content: "";
  pointer-events: none;
}

.scene-fallback::before {
  inset: 13% 9%;
}

.scene-fallback::after {
  top: 13%;
  bottom: 13%;
  left: 50%;
}

.scene-fallback__card {
  position: relative;
  z-index: 1;
  width: min(100%, 560px);
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: rgba(255, 253, 247, 0.94);
}

.scene-fallback__card h3 {
  margin: 12px 0 14px;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(1.45rem, 3vw, 2.5rem);
  font-weight: 500;
  line-height: 1.3;
}

.scene-fallback__card p:not(.eyebrow) {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.88rem;
}

.scene-fallback__card .primary-button {
  margin-right: 14px;
}

.text-link,
.source-links a,
.text-button {
  text-underline-offset: 0.25em;
  text-decoration-thickness: 1px;
}

.mobile-controls {
  position: absolute;
  z-index: 5;
  right: 18px;
  bottom: 18px;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(2, 52px);
  gap: 7px;
}

.mobile-controls button {
  border: 1px solid rgba(255, 255, 255, 0.48);
  border-radius: 14px;
  color: #fff;
  background: rgba(23, 23, 20, 0.82);
  font-size: 1.3rem;
  font-weight: 700;
  touch-action: none;
}

.mobile-controls [data-move="forward"] {
  grid-column: 2;
}

.mobile-controls [data-move="left"] {
  grid-column: 1;
  grid-row: 2;
}

.mobile-controls [data-move="back"] {
  grid-column: 2;
  grid-row: 2;
}

.mobile-controls [data-move="right"] {
  grid-column: 3;
  grid-row: 2;
}

.scene-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin: 20px 0 0;
  padding: 0;
  color: #c8c7c1;
  font-size: 0.75rem;
  list-style: none;
}

.scene-legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scene-legend__line {
  width: 24px;
  height: 10px;
  border: 1px solid #c89658;
}

.scene-legend__line--warning {
  border-color: #f06b52;
}

.scene-legend__panel {
  width: 24px;
  height: 10px;
  background: #e9e6de;
}

.results-summary,
.results-status {
  margin: 0;
}

.results-summary {
  font-weight: 700;
  line-height: 1.5;
}

.results-summary[data-warning="true"] {
  color: var(--warning);
}

.results-status {
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.82rem;
}

.allocation-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.allocation-card {
  display: grid;
  grid-template-columns: 82px 1fr;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 253, 247, 0.75);
  overflow: hidden;
}

.allocation-card--warning {
  border-color: var(--warning);
}

.allocation-card__number {
  display: grid;
  place-items: center;
  min-height: 132px;
  border-right: 1px solid var(--line);
  background: var(--blue);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.02rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  writing-mode: vertical-rl;
}

.allocation-card--warning .allocation-card__number {
  color: #fff;
  background: var(--warning);
}

.allocation-card__body {
  min-width: 0;
  padding: 18px;
}

.allocation-card__participant {
  margin: 0;
  font-size: 1rem;
  line-height: 1.4;
}

.allocation-card__place,
.allocation-card__empty,
.allocation-card__size {
  color: var(--muted);
  font-size: 0.75rem;
}

.allocation-card__place {
  margin: 3px 0 13px;
}

.allocation-card__empty {
  margin: 24px 0;
}

.allocation-card__preview {
  display: grid;
  grid-template-columns: minmax(90px, 150px) 1fr;
  gap: 15px;
  align-items: center;
  margin: 12px 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.allocation-card__preview img {
  width: 100%;
  height: 94px;
  object-fit: contain;
  background: #e7e3da;
}

.allocation-card__title,
.allocation-card__size {
  margin: 0;
}

.allocation-card__title {
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 0.98rem;
  line-height: 1.45;
}

.text-button {
  margin: 7px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 0.75rem;
  text-decoration: underline;
}

.allocation-card__status {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  color: #355d54;
  background: #d9e8dc;
  font-size: 0.68rem;
  font-weight: 700;
}

.allocation-card__status--warning {
  color: #fff;
  background: var(--warning);
}

.source-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(340px, 1.2fr);
  gap: clamp(30px, 7vw, 120px);
  background: var(--yellow);
}

.source-section__body p {
  margin-top: 0;
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 22px;
  font-weight: 700;
}

.source-section__stamp {
  margin-top: 28px !important;
  font-size: 0.78rem;
}

.artwork-dialog {
  width: min(1120px, calc(100% - 36px));
  max-height: calc(100svh - 36px);
  margin: auto;
  padding: 0;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--paper-strong);
  overflow: auto;
}

.artwork-dialog::backdrop {
  background: rgba(12, 12, 10, 0.78);
}

.dialog-close {
  position: sticky;
  z-index: 2;
  top: 14px;
  float: right;
  min-height: 42px;
  margin: 14px 14px 0 0;
  padding: 8px 13px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--paper-strong);
  font-size: 0.78rem;
  font-weight: 700;
}

.dialog-close span {
  margin-left: 6px;
  font-size: 1.2rem;
  line-height: 0;
}

.artwork-dialog__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  min-height: min(720px, calc(100svh - 80px));
}

.artwork-dialog__image-wrap {
  display: grid;
  place-items: center;
  min-height: 460px;
  padding: clamp(24px, 4vw, 58px);
  background: #d8d3ca;
}

.artwork-dialog__image-wrap img {
  width: 100%;
  height: 100%;
  max-height: 680px;
  object-fit: contain;
}

.artwork-dialog__copy {
  align-self: center;
  padding: clamp(30px, 5vw, 68px);
}

.artwork-dialog__copy h2 {
  margin: 14px 0 8px;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.artwork-dialog__artist {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.artwork-dialog__caption {
  margin: 34px 0;
  line-height: 1.9;
}

.artwork-dialog dl {
  margin: 0;
  border-top: 1px solid var(--line);
}

.artwork-dialog dl > div {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.artwork-dialog dt {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.artwork-dialog dd {
  margin: 3px 0 0;
  font-size: 0.83rem;
}

@media (min-width: 769px) {
  .mobile-controls {
    display: none !important;
  }
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .venue-facts {
    max-width: 760px;
  }

  .planning-grid {
    grid-template-columns: 1fr;
  }

  .allocation-overview {
    display: grid;
    grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
    gap: 28px;
  }

  .allocation-overview__heading {
    display: block;
    border: 0;
  }

  .allocation-overview h3 {
    margin-top: 8px;
  }

  .allocation-overview__note {
    grid-column: 2;
  }

  .allocation-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  body {
    background: var(--paper);
  }

  .masthead {
    padding-block: 16px;
  }

  .masthead__status {
    max-width: 15em;
    text-align: right;
  }

  .hero {
    gap: 46px;
    padding-top: 72px;
  }

  .hero--gallery-first {
    padding-top: 58px;
    padding-bottom: 64px;
  }

  .hero h1 {
    letter-spacing: -0.055em;
  }

  .section-heading,
  .source-section {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .allocation-overview {
    display: block;
  }

  .allocation-overview__note {
    grid-column: auto;
  }

  .scene-shell {
    min-height: min(68svh, 590px);
    border-radius: 12px;
  }

  .mobile-controls {
    display: grid;
  }

  .scene-status {
    right: 12px;
    top: 12px;
    left: 174px;
    max-width: none;
    padding: 7px 9px;
    border-radius: 10px;
    font-size: 0.66rem;
  }

  .scene-fallback {
    align-items: end;
    padding: 68px 14px 14px;
  }

  .scene-fallback::before,
  .scene-fallback::after {
    display: none;
  }

  .scene-fallback__card {
    max-height: 76%;
    overflow: auto;
  }

  .artwork-dialog {
    width: 100%;
    max-width: 100%;
    max-height: 92svh;
    margin: auto 0 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 18px 18px 0 0;
  }

  .artwork-dialog__layout {
    width: 100%;
    clear: both;
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .artwork-dialog__image-wrap {
    min-height: 42svh;
    padding: 24px;
  }

  .artwork-dialog__copy {
    padding-top: 32px;
  }
}

@media (max-width: 520px) {
  .masthead__status {
    font-size: 0.6rem;
  }

  .hero h1 {
    font-size: clamp(3.1rem, 17vw, 5rem);
  }

  .hero--gallery-first h1 {
    font-size: clamp(2.95rem, 15vw, 4.6rem);
  }

  .venue-facts__heading {
    display: block;
  }

  .venue-facts h2 {
    margin-top: 8px;
  }

  .venue-facts__grid {
    grid-template-columns: 1fr;
  }

  .venue-facts__grid > div:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .control-panel__row {
    grid-template-columns: 1fr;
  }

  .control-panel__actions {
    display: grid;
  }

  .control-panel__actions button {
    width: 100%;
  }

  .scene-fallback__card .primary-button {
    width: 100%;
    margin: 0 0 14px;
  }

  .scene-fallback__card .text-link {
    display: block;
    text-align: center;
  }

  .allocation-card {
    grid-template-columns: 64px 1fr;
  }

  .allocation-card__body {
    padding: 15px;
  }

  .allocation-card__preview {
    grid-template-columns: 1fr;
  }

  .allocation-card__preview img {
    height: 150px;
  }

  .mobile-controls {
    right: 12px;
    bottom: 12px;
    grid-template-columns: repeat(3, 48px);
    grid-template-rows: repeat(2, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Browser-only visitor prototype: large comparison fields, not a dashboard grid. */
.avatar-section {
  padding: clamp(78px, 9vw, 140px) var(--page-gutter);
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 4%, rgba(241, 216, 122, 0.38) 0 12vw, transparent 12.2vw),
    linear-gradient(135deg, rgba(183, 220, 226, 0.54), transparent 42%),
    var(--paper-strong);
}

.section-heading--avatar {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.avatar-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0 0 clamp(40px, 5vw, 72px);
  padding: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  list-style: none;
}

.avatar-flow li {
  display: flex;
  gap: 9px;
  align-items: center;
  min-height: 64px;
  padding: 12px 18px;
  border-left: 1px solid var(--line);
  font-size: 0.76rem;
  font-weight: 720;
  line-height: 1.45;
}

.avatar-flow li:first-child {
  border-left: 0;
}

.avatar-flow span {
  display: inline-grid;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: Georgia, "Times New Roman", serif;
}

.avatar-customizer {
  margin: 0;
}

.avatar-workbench {
  display: grid;
  grid-template-columns: minmax(360px, 1.18fr) minmax(330px, 1fr) minmax(230px, 0.7fr);
  align-items: stretch;
  border: 1px solid var(--ink);
  background: var(--paper-strong);
}

.avatar-photo-pane,
.avatar-preview-pane,
.avatar-settings-pane {
  min-width: 0;
  padding: clamp(22px, 2.7vw, 38px);
}

.avatar-photo-pane,
.avatar-settings-pane {
  border-left: 1px solid var(--ink);
}

.avatar-photo-pane {
  background: rgba(255, 249, 232, 0.9);
}

.avatar-preview-pane {
  position: relative;
  overflow: hidden;
  background: #f3c984;
}

.avatar-settings-pane {
  background: rgba(225, 241, 237, 0.76);
}

.avatar-mobile-categories {
  display: none;
}

.avatar-preview-pane::before {
  position: absolute;
  top: -12%;
  right: -18%;
  width: 58%;
  aspect-ratio: 1;
  border: 1px solid rgba(23, 23, 20, 0.18);
  border-radius: 50%;
  background: rgba(255, 246, 220, 0.38);
  content: "";
}

.avatar-preview-pane > * {
  position: relative;
  z-index: 1;
}

.avatar-pane-heading h3,
.avatar-export h3,
.avatar-license-note h3 {
  margin: 8px 0 0;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(1.35rem, 2.4vw, 2.3rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.avatar-photo-explanation {
  margin: 20px 0;
  font-size: 0.86rem;
  line-height: 1.85;
}

.avatar-photo-frame {
  display: grid;
  width: 100%;
  min-height: 330px;
  place-items: center;
  margin: 0 0 18px;
  border: 1px solid var(--ink);
  background:
    linear-gradient(rgba(23, 23, 20, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 23, 20, 0.06) 1px, transparent 1px),
    rgba(255, 253, 247, 0.72);
  background-size: 24px 24px;
}

.avatar-photo-frame img {
  width: 100%;
  height: 100%;
  max-height: 460px;
  object-fit: contain;
}

.avatar-photo-frame p {
  max-width: 17em;
  margin: 0;
  padding: 28px;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

.file-button,
.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 0;
  color: inherit;
  background: transparent;
  font-size: 0.84rem;
  font-weight: 750;
  text-decoration: none;
}

.file-button {
  width: 100%;
  border: 1px solid var(--ink);
  background: var(--paper-strong);
  cursor: pointer;
}

.file-button:hover,
.file-button:has(+ .visually-hidden-file:focus-visible) {
  color: var(--paper-strong);
  background: var(--ink);
}

.text-button {
  min-height: 36px;
  padding: 0;
  border-bottom: 1px solid currentColor;
  cursor: pointer;
}

.visually-hidden-file {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.avatar-pose-stage {
  position: relative;
  display: grid;
  width: 100%;
  aspect-ratio: 1;
  place-items: center;
  margin-top: 22px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 252, 237, 0.92) 0 29%, transparent 29.5%),
    linear-gradient(163deg, #efd58e 0 58%, #df8671 58.2% 100%);
}

.avatar-pose-stage::after {
  position: absolute;
  z-index: -1;
  bottom: 8%;
  left: 50%;
  width: 44%;
  height: 7%;
  border-radius: 50%;
  background: rgba(48, 39, 42, 0.16);
  filter: blur(8px);
  content: "";
  transform: translateX(-50%);
}

.avatar-pose-stage canvas {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.choice-fieldset,
.avatar-appearance-grid {
  min-width: 0;
  margin: 28px 0 0;
  padding: 0;
  border: 0;
}

.choice-fieldset legend,
.avatar-appearance-grid legend {
  width: 100%;
  margin-bottom: 12px;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.84rem;
  font-weight: 750;
}

.choice-grid {
  display: grid;
  gap: 8px;
}

.choice-tile {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: start;
  min-height: 58px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.choice-tile input {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--accent-dark);
}

.choice-tile strong,
.choice-tile small {
  display: block;
}

.choice-tile strong {
  font-size: 0.88rem;
}

.choice-tile small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.72rem;
}

.choice-tile:has(input:checked) strong::after {
  content: "選択中";
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  border: 1px solid currentColor;
  font-size: 0.62rem;
  font-weight: 750;
  vertical-align: 0.12em;
}

.avatar-appearance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.avatar-appearance-grid legend {
  grid-column: 1 / -1;
}

.avatar-appearance-grid label,
.avatar-export__actions label {
  display: grid;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 750;
}

.avatar-appearance-grid select,
.avatar-export__actions select {
  width: 100%;
}

.avatar-appearance-grid .checkbox-line {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  min-height: 44px;
}

.checkbox-line input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--accent-dark);
}

.avatar-appearance-grid:disabled {
  opacity: 0.46;
}

.avatar-appearance-grid.is-disabled > label,
.avatar-appearance-grid.is-disabled .avatar-advanced {
  opacity: 0.46;
}

.avatar-advanced,
.avatar-config-actions {
  grid-column: 1 / -1;
}

.avatar-advanced {
  margin-top: 2px;
  border-top: 1px solid var(--line);
}

.avatar-advanced summary {
  min-height: 44px;
  padding: 13px 0 10px;
  font-size: 0.78rem;
  font-weight: 750;
  cursor: pointer;
}

.avatar-advanced__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 8px 0 4px;
}

.avatar-config-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.avatar-config-actions button {
  width: 100%;
  min-height: 44px;
}

.avatar-config-actions .text-button {
  border: 1px solid var(--ink);
}

.avatar-config-actions .field-note {
  grid-column: 1 / -1;
  min-height: 1.5em;
  margin: 0;
}

.avatar-placement-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 36px;
  align-items: center;
  padding: clamp(24px, 3vw, 40px);
  color: var(--paper-strong);
  background: var(--dark);
}

.avatar-placement-bar p {
  margin: 7px 0 0;
}

.avatar-placement-bar .primary-button {
  color: var(--ink);
  background: var(--yellow);
}

#avatar-placement-status {
  grid-column: 1 / -1;
  margin: 0;
  color: #d6d2c8;
  font-size: 0.78rem;
}

.avatar-export {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(260px, 1fr);
  gap: clamp(24px, 4vw, 68px);
  align-items: start;
  padding: clamp(42px, 6vw, 88px) 0;
  border-bottom: 1px solid var(--ink);
}

.avatar-export__heading p:last-child {
  max-width: 32em;
}

.avatar-pose-controls {
  margin-top: 0;
}

.choice-grid--pose {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.choice-grid--pose .choice-tile {
  grid-template-columns: 20px 1fr;
}

.avatar-export__actions {
  display: grid;
  gap: 12px;
}

.avatar-export__actions .secondary-button {
  text-align: center;
  text-decoration: none;
}

.merch-preview {
  display: grid;
  grid-template-columns: minmax(270px, 0.68fr) minmax(0, 1.32fr);
  gap: clamp(36px, 6vw, 100px);
  padding: clamp(78px, 9vw, 140px) 0;
}

.merch-preview header {
  align-self: center;
}

.merch-preview h2 {
  margin: 12px 0 24px;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4vw, 4.6rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.merch-preview-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.merch-item--hero,
.merch-disclaimer {
  grid-column: 1 / -1;
}

.merch-item {
  margin: 0;
}

.merch-stage {
  position: relative;
  display: grid;
  min-height: 350px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--ink);
  background: #e7ded1;
}

.merch-item--hero .merch-stage {
  min-height: 540px;
}

.merch-stage__scene-label {
  position: absolute;
  z-index: 4;
  top: 18px;
  left: 18px;
  padding: 6px 10px;
  color: var(--paper-strong);
  background: var(--ink);
  font-size: 0.68rem;
  font-weight: 760;
  letter-spacing: 0.06em;
}

.merch-stage__print {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
}

.merch-stage__avatar {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.merch-stage--acrylic {
  background:
    linear-gradient(112deg, transparent 0 46%, rgba(255, 255, 255, 0.42) 46.3% 51%, transparent 51.3%),
    linear-gradient(#d6ebe6 0 68%, #a99b87 68% 100%);
}

.merch-stage--acrylic .merch-stage__print {
  position: absolute;
  bottom: 18%;
  width: 48%;
  height: 70%;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.78);
  border-radius: 42% 42% 18% 18% / 24% 24% 10% 10%;
  background: linear-gradient(112deg, rgba(255, 255, 255, 0.2), transparent 52%);
  box-shadow: inset 0 0 0 1px rgba(52, 70, 72, 0.16);
  filter: drop-shadow(7px 10px 0 rgba(24, 23, 20, 0.16));
}

.merch-stage--acrylic .merch-stage__avatar {
  transform: scale(1.44);
  filter:
    drop-shadow(0 0 1px rgba(255, 255, 255, 0.96))
    drop-shadow(3px 5px 0 rgba(24, 23, 20, 0.13));
}

.merch-stage__base {
  position: absolute;
  z-index: 1;
  bottom: 13%;
  width: 64%;
  height: 10%;
  border: 1px solid rgba(23, 23, 20, 0.48);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 0 14px 24px rgba(23, 23, 20, 0.16);
}

.merch-stage--sticker {
  background: #e9caca;
}

.merch-stage--sticker .merch-stage__print {
  width: 76%;
  aspect-ratio: 1;
  overflow: hidden;
  padding: 4%;
  border-radius: 46% 54% 49% 51% / 52% 43% 57% 48%;
  background: #fffdf7;
  filter: drop-shadow(7px 8px 0 rgba(23, 23, 20, 0.14));
  transform: rotate(-4deg);
}

.merch-stage--sticker .merch-stage__avatar {
  transform: scale(1.5);
}

.merch-stage--tshirt {
  background: #d6d0c4;
}

.merch-stage--tshirt::before {
  content: "";
  position: absolute;
  width: 88%;
  height: 82%;
  clip-path: polygon(20% 0, 37% 8%, 63% 8%, 80% 0, 100% 26%, 82% 42%, 76% 31%, 78% 100%, 22% 100%, 24% 31%, 18% 42%, 0 26%);
  background: #f7f2e8;
  filter: drop-shadow(0 13px 12px rgba(23, 23, 20, 0.16));
}

.merch-stage--tshirt .merch-stage__print {
  position: absolute;
  top: 31%;
  width: 36%;
  height: 43%;
  overflow: hidden;
}

.merch-stage--tshirt .merch-stage__avatar {
  transform: scale(1.9);
  transform-origin: 50% 58%;
}

.merch-item figcaption {
  padding-top: 14px;
}

.merch-item figcaption strong,
.merch-item figcaption span {
  display: block;
}

.merch-disclaimer {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.7;
}

.merch-item figcaption strong {
  font-size: 0.9rem;
}

.merch-item figcaption span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.65;
}

.avatar-license-note {
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1.4fr);
  gap: clamp(26px, 5vw, 80px);
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.avatar-license-note p {
  max-width: 64em;
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 1180px) {
  .avatar-workbench {
    grid-template-columns: minmax(320px, 1.1fr) minmax(250px, 0.9fr);
  }

  .avatar-photo-pane {
    grid-column: 1 / -1;
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .avatar-appearance-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .avatar-advanced__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .avatar-appearance-grid legend,
  .avatar-appearance-grid .checkbox-line {
    grid-column: 1 / -1;
  }

  .avatar-export {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .avatar-export__actions {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: end;
  }

  .avatar-export__actions .field-note {
    grid-column: 1 / -1;
  }

  .merch-preview {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .avatar-section {
    padding-top: 66px;
    padding-bottom: 80px;
  }

  .avatar-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .avatar-flow li {
    flex-direction: column;
    gap: 5px;
    min-height: 62px;
    padding: 8px 5px;
    border-left: 1px solid var(--line);
    font-size: 0.65rem;
    text-align: center;
  }

  .avatar-flow li:first-child {
    border-left: 0;
  }

  .avatar-workbench {
    grid-template-columns: 1fr;
  }

  .avatar-photo-pane,
  .avatar-settings-pane {
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .avatar-settings-pane {
    padding-right: 20px;
    padding-left: 20px;
    background: #e1f1ed;
  }

  .avatar-mobile-categories {
    position: sticky;
    z-index: 3;
    top: 0;
    display: flex;
    gap: 8px;
    margin: 20px -20px 0;
    padding: 12px 20px;
    overflow-x: auto;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
    background: rgba(225, 241, 237, 0.96);
    scrollbar-width: thin;
  }

  .avatar-mobile-categories button {
    flex: 0 0 auto;
    min-height: 42px;
    padding: 8px 13px;
    border: 1px solid var(--ink);
    border-radius: 999px;
    color: var(--ink);
    background: transparent;
    font-size: 0.74rem;
    font-weight: 750;
    white-space: nowrap;
  }

  .avatar-mobile-categories button[aria-selected="true"] {
    color: var(--paper-strong);
    background: var(--ink);
  }

  [data-avatar-panel].is-mobile-hidden {
    display: none !important;
  }

  .avatar-appearance-grid {
    margin-top: 18px;
  }

  .avatar-appearance-grid > legend,
  .avatar-advanced > summary {
    display: none;
  }

  .avatar-advanced,
  .avatar-advanced__grid {
    display: contents;
  }

  .avatar-config-actions {
    margin-top: 22px;
  }

  .avatar-photo-frame {
    min-height: 300px;
  }

  .avatar-pose-stage {
    width: min(100%, 520px);
    margin-right: auto;
    margin-left: auto;
  }

  .avatar-appearance-grid {
    grid-template-columns: 1fr 1fr;
  }

  .avatar-advanced__grid {
    grid-template-columns: 1fr 1fr;
  }

  .avatar-placement-bar,
  .avatar-export,
  .avatar-license-note {
    grid-template-columns: 1fr;
  }

  .avatar-placement-bar .primary-button {
    width: 100%;
  }

  .avatar-export__actions {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .merch-preview-list {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .merch-item--hero,
  .merch-disclaimer {
    grid-column: auto;
  }

  .merch-stage {
    min-height: min(110vw, 430px);
  }

  .merch-item--hero .merch-stage {
    min-height: min(125vw, 520px);
  }
}

@media (max-width: 430px) {
  .avatar-appearance-grid,
  .avatar-advanced__grid,
  .avatar-config-actions,
  .choice-grid--pose {
    grid-template-columns: 1fr;
  }

  .avatar-appearance-grid .checkbox-line,
  .avatar-appearance-grid legend,
  .avatar-config-actions .field-note {
    grid-column: auto;
  }

  .choice-grid--pose .choice-tile {
    min-height: 48px;
  }
}