/* home/folios.css — the folio wall (folio-wall.mjs).
 *
 * A folio is a page under glass. Liquid glass (not yet seasoned): the scan
 * refracts through an animated displacement filter and a highlight follows
 * the pointer. Seasoned: still, clear glass with one quiet sheen. Layers
 * under the top scan peek out at the edge, oldest deepest. */

.folio-wall {
  display: grid;
  gap: 1.4rem;
  margin-block: 0.5rem 2.5rem;
}

.folio-status {
  margin: 0;
  font-size: 0.9rem;
  color: color-mix(in srgb, var(--hub-ink, #1d2733) 70%, transparent);
}

.folio-shelf {
  display: grid;
  gap: 0.9rem;
}

.folio-shelf-title {
  margin: 0;
  font-size: 1.1rem;
  color: #2f483a;
}

.folio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
  gap: 1.2rem 1rem;
  align-items: start;
}

.folio {
  display: grid;
  gap: 0.7rem;
}

.folio-figure {
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

/* The glass. */
.folio-glass {
  --mx: 50%;
  --my: 35%;
  position: relative;
  isolation: isolate;
  aspect-ratio: 4 / 5;
  border-radius: 0.45rem;
  overflow: hidden;
  background: #1a2219;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.35) inset,
    0 14px 34px rgba(12, 20, 16, 0.22);
  cursor: default;
}

.folio-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Older layers peek out at the bottom-right, deepest furthest. */
.folio-layer--under {
  inset: auto;
  right: calc(-0.5rem * var(--depth, 1));
  bottom: calc(-0.5rem * var(--depth, 1));
  width: 100%;
  height: 100%;
  opacity: 0.9;
  filter: saturate(0.85) brightness(0.9);
  z-index: -1;
}

.folio-glass:has(.folio-layer--under) {
  overflow: visible;
  border-radius: 0.45rem;
}

.folio-glass:has(.folio-layer--under) > .folio-layer:not(.folio-layer--under) {
  border-radius: 0.45rem;
}

.folio-empty {
  display: grid;
  place-items: center;
  height: 100%;
  color: #cdaa72;
  font-family: "JetBrainsMono", ui-monospace, monospace;
  font-size: 0.8rem;
}

/* The sheen: a highlight that follows the pointer while liquid. */
.folio-sheen {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background:
    radial-gradient(38% 30% at var(--mx) var(--my), rgba(255, 250, 235, 0.42), rgba(255, 250, 235, 0.08) 55%, transparent 75%),
    linear-gradient(165deg, rgba(255, 255, 255, 0.22), transparent 38%, rgba(0, 0, 0, 0.08) 100%);
  mix-blend-mode: screen;
  transition: background-position 120ms ease;
}

/* Liquid: refraction, a slow breath, and the sheen alive. */
.folio.is-liquid .folio-layer:not(.folio-layer--under) {
  filter: url(#liquid-glass) saturate(1.08);
  transform: scale(1.04);
  animation: folio-breathe 9s ease-in-out infinite;
}

.folio.is-liquid .folio-glass {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.5) inset,
    0 0 0 1px rgba(205, 170, 114, 0.35),
    0 18px 44px rgba(12, 20, 16, 0.28),
    0 0 2.5rem rgba(205, 170, 114, 0.22);
}

/* Liquid glass refracts; it does not blur. The sheen only saturates. */
.folio.is-liquid .folio-sheen {
  backdrop-filter: saturate(1.12);
  -webkit-backdrop-filter: saturate(1.12);
}

@keyframes folio-breathe {
  0%, 100% { transform: scale(1.04) translate(0, 0); }
  50% { transform: scale(1.05) translate(-0.4%, 0.3%); }
}

/* Seasoned: still and clear. */
.folio.is-seasoned .folio-sheen {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.18), transparent 40%);
  mix-blend-mode: normal;
}

/* Words. */
.folio-caption {
  display: grid;
  gap: 0.2rem;
}

.folio-kicker {
  font-family: "JetBrainsMono", "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8a6a36;
}

.folio-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: 1.15rem;
  line-height: 1.2;
  color: #2f483a;
}

.folio-note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--hub-ink, #1d2733) 75%, transparent);
}

.folio-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.4rem 0.8rem;
  margin: 0;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(47, 72, 58, 0.16);
  font-size: 0.8rem;
}

.folio-meta div {
  display: grid;
  gap: 0.05rem;
}

.folio-meta dt {
  font-family: "JetBrainsMono", ui-monospace, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8a6a36;
}

.folio-meta dd {
  margin: 0;
  color: var(--hub-ink, #1d2733);
}

.folio-meta a {
  color: #2f483a;
}

.folio-how {
  display: grid;
  gap: 0.5rem;
  padding: 1rem 1.1rem;
  border: 1px dashed rgba(47, 72, 58, 0.3);
  border-radius: 0.8rem;
  background: rgba(205, 170, 114, 0.06);
}

.folio-how h2 {
  margin: 0;
  font-size: 1rem;
}

.folio-how ol {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.3rem;
  font-size: 0.92rem;
  line-height: 1.5;
}

@media (prefers-reduced-motion: reduce) {
  .folio.is-liquid .folio-layer:not(.folio-layer--under) {
    filter: url(#liquid-glass-still) saturate(1.05);
    animation: none;
    transform: scale(1.03);
  }
  .folio-sheen {
    transition: none;
  }
}