:root { --ground: #d8ff00; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--ground); }
body { overflow-x: hidden; }
.title {
  position: absolute; top: 14px; right: 4px; z-index: 5; margin: 0;
  writing-mode: vertical-rl;
  font: 600 13px/1.25 system-ui, -apple-system, "Hiragino Sans", sans-serif;
  color: #000; letter-spacing: 0.08em; white-space: nowrap;
}
.title span { display: block; font-weight: 400; padding-top: 10px; }
#tower { position: relative; width: 100%; margin-top: 40px; }
.floor, .plate { position: relative; overflow: hidden; }
.floor canvas, .plate canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
canvas.leak { image-rendering: pixelated; }
#shaft { position: absolute; top: 0; bottom: 0; z-index: 3; pointer-events: none; }
#shaft { background: #000; }
.text {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 40px;
  padding: 96px 16px 120px; max-width: 1080px; margin: 0 auto;
  color: #000; font: 15px/1.75 system-ui, -apple-system, "Hiragino Sans", sans-serif;
}
.text h2 { font-size: 15px; margin: 0 0 12px; font-weight: 600; }
.text p { margin: 0 0 14px; }
@media (max-width: 600px) { .title { font-size: 12px; right: 2px; } .title span { display: none; } .text { padding-top: 64px; } }
.quote { grid-column: 1 / -1; margin: 40px 0 0; padding-top: 32px; border-top: 2px solid #000; }
.quote blockquote { margin: 0 0 10px; font-size: 22px; line-height: 1.5; font-weight: 400; }
.quote blockquote[lang="ja"] { font-size: 19px; }
.quote figcaption { margin-top: 16px; font-size: 13px; }
@media (max-width: 600px) { .quote blockquote { font-size: 18px; } .quote blockquote[lang="ja"] { font-size: 16px; } }
.more { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 0 40px; font-size: 13px; }
.more summary { grid-column: 1 / -1; cursor: pointer; margin-bottom: 12px; }

/* Return navigation belongs to the existing reading area. */
.home-return { margin: 24px 0 0; font-size: 12px; }
.home-link { color: inherit; font: inherit; text-decoration: underline; text-underline-offset: .2em; }
.home-link:focus-visible { outline: 1px solid currentColor; outline-offset: 4px; }