:root {
  --cover-grid: rgba(216, 209, 194, .72);
  --cover-watermark: rgba(46, 48, 44, .055);
}

/* A quiet manuscript field gives the animated hexagram a physical setting. */
.site-cover {
  box-shadow: inset 0 0 0 16px rgba(216, 209, 194, .2), inset 0 0 90px rgba(62, 52, 40, .06);
}

.site-cover::before {
  box-shadow: 0 0 0 22px var(--cover-paper), 0 0 0 23px rgba(216, 209, 194, .58);
}

.site-cover::after {
  background: rgba(233, 227, 213, .26);
}

.cover-frame {
  isolation: isolate;
}

.cover-frame::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 16px 20px;
  border: 1px solid var(--cover-grid);
  pointer-events: none;
}

.cover-frame::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 16px;
  right: 23.5%;
  bottom: 16px;
  width: 1px;
  background: var(--cover-grid);
  pointer-events: none;
}

.cover-title-wrap::before {
  content: "觀";
  position: absolute;
  z-index: -1;
  top: -112px;
  left: -34px;
  color: var(--cover-watermark);
  font: 800 240px/.8 var(--serif);
  pointer-events: none;
}

.cover-center {
  position: relative;
}

.cover-center::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  right: -4vw;
  bottom: 0;
  width: 47%;
  border-left: 1px solid rgba(216, 209, 194, .62);
  background: rgba(233, 227, 213, .34);
  pointer-events: none;
}

.cover-orbit {
  position: absolute;
  z-index: 1;
  top: 50%;
  right: max(7vw, 72px);
  width: min(36vw, 470px);
  aspect-ratio: 1;
  display: block;
  transform: translateY(-48%);
  color: rgba(125, 120, 108, .64);
  font: 600 11px/1 var(--serif);
  pointer-events: none;
}

.cover-orbit span {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.cover-orbit span::after {
  content: "";
  display: block;
  width: 20px;
  height: 1px;
  background: var(--cover-line-color);
}

.cover-orbit span:nth-child(1) { top: -3px; left: 50%; transform: translateX(-50%); flex-direction: column; gap: 6px; }
.cover-orbit span:nth-child(1)::after { width: 1px; height: 20px; }
.cover-orbit span:nth-child(2) { top: 18%; right: -2px; flex-direction: row-reverse; }
.cover-orbit span:nth-child(3) { top: 50%; right: -9px; transform: translateY(-50%); flex-direction: row-reverse; }
.cover-orbit span:nth-child(4) { bottom: 18%; right: -2px; flex-direction: row-reverse; }
.cover-orbit span:nth-child(5) { bottom: -3px; left: 50%; transform: translateX(-50%); flex-direction: column-reverse; gap: 6px; }
.cover-orbit span:nth-child(5)::after { width: 1px; height: 20px; }
.cover-orbit span:nth-child(6) { bottom: 18%; left: -2px; }
.cover-orbit span:nth-child(7) { top: 50%; left: -9px; transform: translateY(-50%); }
.cover-orbit span:nth-child(8) { top: 18%; left: -2px; }

@media (max-width: 900px) {
  .cover-orbit { right: 5vw; width: min(40vw, 410px); }
}

@media (max-width: 680px) {
  .cover-frame::before { inset: 10px; }
  .cover-frame::after,
  .cover-orbit { display: none; }
}