/* home page: two full-screen scenes that swap */
.scene { position: fixed; inset: 0; transition: opacity .7s ease, visibility .7s; }
.scene canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.scene--about { background: var(--black); color: var(--white); opacity: 0; visibility: hidden; }
body.at-about .scene--about { opacity: 1; visibility: visible; }
body.at-about .scene--home { opacity: 0; visibility: hidden; }
body.at-about { background: var(--black); color: var(--white); }


/* about */
.about__labels { list-style: none; margin: 0; padding: 0; position: absolute; inset: 0; pointer-events: none; }
.about__labels button {
  position: absolute; left: 0; top: 0;
  font-family: var(--mono); font-size: 11px; font-weight: 500; letter-spacing: 0.06em;
  color: var(--white); pointer-events: auto;
  padding: 6px 8px;
  white-space: nowrap;
  transition: opacity .3s;
}
.about__labels button:hover { color: #fff; }

/* topic panel: printed on the sheet */
.panel {
  position: absolute; inset: 0;
  color: #141413;
  pointer-events: none;
  opacity: 0;
  transition: opacity .5s ease;
}
.panel.on { opacity: 1; }
.panel.on > * { pointer-events: auto; }
.panel[hidden] { display: none; }
.panel__back { position: absolute; top: 84px; left: 44px; display: inline-flex; align-items: center; gap: 6px; color: #3d3d3a; }
.panel__back:hover { color: #0b0b0b; }
.panel__inner {
  position: absolute; left: 44px; top: max(124px, 17vh);
  width: min(520px, calc(100vw - 88px));
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(20,20,19,.3) transparent;
  padding-right: 6px;
  transition: opacity .18s ease;
}
.panel__inner.swap { opacity: 0; }
.panel__kicker { margin: 0 0 10px; color: #141413; font-weight: 500; }
.panel__title { margin: 0 0 18px; font-size: 13px; font-weight: 800; letter-spacing: 0.22em; text-transform: uppercase; }
.panel__body { font-size: 13px; line-height: 1.6; color: #2b2b29; }
.panel__body p { margin: 0 0 12px; }
.panel__body .lead { font-family: var(--mono); font-size: 13px; line-height: 1.65; color: #1c1c1b; margin-bottom: 20px; max-width: 46ch; }
.panel__body .rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(20,20,19,.18); }
.panel__body .rows li { border-bottom: 1px solid rgba(20,20,19,.18); }
.panel__body .rows a, .panel__body .rows div {
  display: grid; grid-template-columns: 84px 1fr; align-items: baseline; gap: 2px 12px;
  padding: 9px 0; text-decoration: none; color: inherit;
  transition: padding .25s ease;
}
.panel__body .rows i { font-family: var(--mono); white-space: nowrap; font-style: normal; font-size: 10px; letter-spacing: .04em; text-transform: uppercase; font-weight: 500; color: #141413; font-variant-numeric: tabular-nums; }
.panel__body .rows b { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: #141413; line-height: 1.4; }
.panel__body .rows span { font-family: var(--mono); grid-column: 2; font-size: 10px; line-height: 1.5; letter-spacing: .04em; text-transform: uppercase; font-weight: 500; color: #2b2b29; }
.panel__body .rows b.plain { text-transform: none; letter-spacing: .04em; font-size: 13px; }
.panel__body .rows span:empty { display: none; }
.panel__body .rows a:hover { padding-left: 8px; }
.panel__body .rows a:hover b { text-decoration: underline; text-underline-offset: 3px; }
.panel__body .more { margin-top: 14px; font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.panel__body .more a { text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 2px; }
.panel__tabs {
  position: absolute; left: 44px; bottom: calc(24vw * 0.62 + 40px);
  display: flex; flex-wrap: wrap; gap: 10px 18px; max-width: 420px;
  color: #3d3d3a;
}
.panel__tabs button { font-size: 11px; letter-spacing: 0.12em; }
.panel__tabs button[aria-current="true"] { color: #0b0b0b; text-decoration: underline; text-underline-offset: 4px; }
.panel__tabs button[aria-current="true"]::before { content: "> "; }
.panel__big {
  position: absolute; left: 40px; bottom: -0.2em;
  margin: 0;
  font-size: 24vw; line-height: 1; font-weight: 900; font-stretch: 112%;
  letter-spacing: -0.02em; color: transparent; -webkit-text-stroke: 1.5px #0b0b0b;
  white-space: nowrap; pointer-events: none !important;
}

@media (max-width: 700px) {
  .panel__body .rows a, .panel__body .rows div { grid-template-columns: 76px 1fr; }
  .panel__inner { top: 120px; width: calc(100vw - 88px); }
}

/* hide the scene's own controls while a sheet is printed */
.home__status { opacity: 0; transition: opacity .8s ease; }
body.intro-done .home__status { opacity: 1; }
.about__status { transition: opacity .4s ease; }
body.sheet-on .about__status { opacity: 0; pointer-events: none; }