/* The opening book on the home page */
.tome-stage {
  --w: min(270px, 22vw); --h: calc(var(--w) * 1.6); --t: calc(var(--w) * 0.115);
  --cream: #f6f4ec; --cream-edge: #dfdbcb;
  position: relative; height: calc(var(--h) * 1.62); display: grid; place-items: center; perspective: 1300px;
}
.tome {
  --rx: 0deg; --rz: 0deg;
  position: relative; width: var(--w); height: var(--h); transform-style: preserve-3d;
  transform: rotateX(10deg) rotateY(-34deg) rotateZ(2deg) scale(1.4);
  transition: transform 1.5s cubic-bezier(.65,0,.25,1);
}
.tome.is-down { transform: translate(calc(var(--w) / 2), 4%) rotateX(calc(36deg + var(--rx))) rotateZ(calc(-4deg + var(--rz))) scale(1.02); }
.tome.is-live { transition: transform .5s ease-out; }
.tome > * { position: absolute; }
.tome-back { inset: 0; background: #d94a00; border-radius: 0 3px 3px 0; transform: rotateY(180deg); backface-visibility: hidden; }
.tome-spine { left: 0; top: 0; width: var(--t); height: 100%; max-width: none; transform-origin: left; transform: rotateY(-90deg); }
.tome-edge { backface-visibility: hidden; }
.tome-edge.right {
  right: 3px; top: 3px; width: var(--t); height: calc(100% - 6px); transform-origin: right; transform: rotateY(90deg);
  background: repeating-linear-gradient(90deg, #fbfaf4 0 1px, #e2dfcf 1px 2px, #f6f4ea 2px 3px);
}
.tome-edge.bottom, .tome-edge.top {
  left: 1px; width: calc(100% - 4px); height: var(--t);
  background: repeating-linear-gradient(0deg, #fbfaf4 0 1px, #dedac8 1px 2px, #f4f2e7 2px 3px);
}
.tome-edge.bottom { bottom: 3px; transform-origin: bottom; transform: rotateX(90deg); }
.tome-edge.top { top: 3px; transform-origin: top; transform: rotateX(-90deg); }

.tome .leaf { inset: 3px 3px 3px 0; transform-style: preserve-3d; transform-origin: left center; transform: translateZ(var(--z, 0px)); transition: transform 1.25s cubic-bezier(.45,0,.2,1); }
.tome .leaf.cover { inset: 0; --z: var(--t); }
.tome .leaf.turned { transform: translateZ(var(--zt, var(--t))) rotateY(-177deg); }
.tome .leaf.base { --z: calc(var(--t) - 2px); }
.tome-stage .face { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; backface-visibility: hidden; overflow: hidden; }
.tome-stage .face.back { transform: rotateY(180deg); }
.tome .leaf.cover .face { border-radius: 0 3px 3px 0; }
.tome .leaf.cover .face.front { box-shadow: inset 3px 0 0 rgba(255,255,255,.3), inset 7px 0 6px -4px rgba(0,0,0,.28); }
.tome .inside {
  background: linear-gradient(270deg, #b33c00 0, #d94800 9%, #f85502 100%); color: #fff;
  display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 12%;
}
.tome .inside small { font-size: calc(var(--w) * 0.036); letter-spacing: .24em; text-transform: uppercase; color: #ffe0cc; margin-bottom: 1.6em; }
.tome .inside p { font-size: calc(var(--w) * 0.08); font-weight: 500; line-height: 1.16; letter-spacing: -0.02em; margin: 0 0 1.2em; }
.tome .inside span { font-size: calc(var(--w) * 0.034); font-weight: 700; letter-spacing: .22em; text-transform: uppercase; color: #fff; line-height: 1.6; }

.sheet {
  background: var(--cream); color: #1d1d1b; text-align: left;
  padding: calc(var(--w) * 0.085) calc(var(--w) * 0.075) calc(var(--w) * 0.11) calc(var(--w) * 0.095);
  font: max(10px, calc(var(--w) * 0.047)) / 1.42 var(--sans);
}
.sheet.front { background: linear-gradient(90deg, var(--cream-edge) 0, #f0eee3 6%, var(--cream) 14%, #f9f8f2 100%); }
.sheet.back { background: linear-gradient(270deg, var(--cream-edge) 0, #f0eee3 6%, var(--cream) 14%, #f9f8f2 100%); padding-left: calc(var(--w) * 0.075); padding-right: calc(var(--w) * 0.095); }
.sheet p { margin: 0 0 .55em; }
.sheet p.gap { text-align: center; color: #9a958a; margin: .2em 0 .5em; }
.sheet .sheet-kicker { font-size: max(7.5px, calc(var(--w) * 0.032)); font-weight: 700; line-height: 1.4; letter-spacing: .16em; text-transform: uppercase; color: var(--red); margin-bottom: .4em; }
.sheet .sheet-title { font-size: calc(var(--w) * 0.1); font-weight: 500; line-height: 1.02; letter-spacing: -0.035em; margin-bottom: .6em; }
.sheet .big { font-size: 1.3em; line-height: 1.2; font-weight: 500; letter-spacing: -0.01em; }
.sheet .folio { position: absolute; bottom: calc(var(--w) * 0.035); left: 0; right: 0; text-align: center; font-size: .72em; color: #8f8a7d; }
.end-sheet { display: flex; flex-direction: column; justify-content: center; text-align: center; }
.end-sheet .sheet-kicker { margin-bottom: 1.2em; }
.end-sheet .end-hook { font-size: calc(var(--w) * 0.088); font-weight: 500; line-height: 1.12; letter-spacing: -0.03em; margin: 0 0 .7em; }
.end-sheet .end-sub { font-size: calc(var(--w) * 0.05); color: var(--red); margin: 0 0 1.6em; }
.end-sheet .button { align-self: center; font-size: max(8px, calc(var(--w) * 0.034)); padding: 1em 1.2em; }
.sheet.blurb { display: flex; flex-direction: column; justify-content: center; text-align: center; }
.sheet.blurb p { font-size: calc(var(--w) * 0.066); line-height: 1.32; margin: 0 0 1em; letter-spacing: -0.01em; }
.sheet.blurb span { font-size: calc(var(--w) * 0.032); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--red); }
.sheet .w { opacity: 0; }
.tome.is-open .sheet .w { animation: ink .5s ease forwards; animation-delay: calc(1.3s + var(--i) * 45ms); }

.tome-controls {
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 16px;
  white-space: nowrap; font-size: .9rem; color: var(--mute); animation: rise .6s ease both;
}
.tome-controls[hidden] { display: none; }
.tome-controls button { font: inherit; font-weight: 700; color: var(--ink); background: #fff; border: 1px solid var(--ink); padding: .5rem 1rem; cursor: pointer; letter-spacing: .04em; }
.tome-controls button:hover:not(:disabled) { background: var(--ink); color: #fff; }
.tome-controls button:disabled { opacity: .3; cursor: default; }
.tome-controls button[data-next].last { background: var(--red); border-color: var(--red); color: #fff; }
.tome-measure { position: absolute; visibility: hidden; pointer-events: none; left: 0; top: 0; width: calc(var(--w) - 3px); height: calc(var(--h) - 6px); }
@keyframes rise { from { opacity: 0; transform: translate(-50%, 10px); } }
@keyframes ink { from { opacity: 0; filter: blur(3px); } to { opacity: 1; filter: none; } }

@media (prefers-reduced-motion: reduce) {
  .tome, .tome .leaf { transition: none; }
  .tome.is-open .sheet .w { animation: none; opacity: 1; }
}
@media (max-width: 900px) {
  .tome-stage { --w: min(220px, 44vw); height: calc(var(--h) * 1.5); }
}

.leaf.cover > img.face.front { outline: 1px solid #dcdcdc; outline-offset: -1px; }