/* An ex-libris plate: warm paper in either room theme. */
.bookplate {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-items: center;
  padding: clamp(8px, 2.4vw, 28px);
  opacity: 0;
  perspective: 1500px;
  transition: opacity var(--duration-normal) var(--ease-reveal);
}
.bookplate[hidden] { display: none; }
.bookplate.is-open { opacity: 1; }
.bookplate__scrim { position: absolute; inset: 0; background: oklch(.1 .018 160 / .82); backdrop-filter: blur(6px); }
.bookplate__card {
  --book-origin-dx: 0px; --book-origin-dy: 20px;
  width: min(980px, 100%);
  min-height: 440px;
  max-height: calc(100dvh - 56px);
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(210px, .72fr) minmax(0, 1.4fr);
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(32px, 4vw, 54px);
  overflow-y: auto;
  color: var(--plate-text);
  background: var(--plate-bg);
  border: 1px solid var(--plate-rule);
  border-radius: 2px;
  box-shadow: 0 32px 100px oklch(.05 .01 160 / .55), inset 0 1px oklch(1 .01 90 / .5);
  transform: translate3d(var(--book-origin-dx), var(--book-origin-dy), -60px) scale(.88);
  transition: transform var(--duration-pull) var(--ease-reveal);
}
.bookplate.is-open .bookplate__card { transform: translate3d(0, 0, 0) scale(1); }
.bookplate__card::before {
  content: ""; position: absolute; inset: 12px; pointer-events: none;
  border: 1px solid var(--plate-rule);
  background:
    linear-gradient(var(--plate-rule), var(--plate-rule)) 4px 4px / 12px 1px no-repeat,
    linear-gradient(var(--plate-rule), var(--plate-rule)) calc(100% - 4px) calc(100% - 4px) / 12px 1px no-repeat;
}
.bookplate__cover-column, .bookplate__details { position: relative; z-index: 1; min-width: 0; }
.bookplate__cover-column { display: grid; place-items: center; align-content: center; padding: 12px 0; }
    .bookplate__cover-frame {
      --book-depth: 24px;
      --book-half-depth: 12px;
      --book-cover-border: 0px;
      width: min(100%, 218px);
      aspect-ratio: 2 / 3;
      margin: 0;
      position: relative;
      overflow: visible;
      border: 0;
      background: transparent;
      transform-style: preserve-3d;
      transform: rotateX(4deg) rotateY(-18deg) rotateZ(-.35deg) translateZ(18px);
      transform-origin: center center;
      transition: transform 520ms cubic-bezier(.16, 1, .3, 1), filter 420ms ease;
      filter: drop-shadow(24px 28px 20px rgba(58, 38, 23, .32));
      backface-visibility: visible;
      isolation: isolate;
    }

    .bookplate.is-open .bookplate__cover-frame {
      transform: rotateX(4deg) rotateY(-18deg) rotateZ(-.35deg) translateZ(18px);
    }

    .bookplate__book-front,
    .bookplate__book-face {
      position: absolute;
      display: block;
      transform-style: preserve-3d;
      backface-visibility: hidden;
    }

    .bookplate__book-front {
      inset: 0;
      z-index: 6;
      display: grid;
      overflow: hidden;
      border: 0;
      border-radius: 1px 2px 2px 1px;
      background: var(--book-binding, var(--plate-accent));
      box-shadow:
        0 0 0 var(--book-cover-border) var(--book-binding, var(--plate-accent)),
        0 0 0 calc(var(--book-cover-border) + 1px) color-mix(in srgb, var(--book-binding, var(--plate-accent)) 72%, #463626),
        inset 1px 0 rgba(255,255,255,.12),
        inset -1px 0 rgba(0,0,0,.1);
      transform: translateZ(var(--book-half-depth));
    }

    .bookplate__book-back {
      inset: 0;
      z-index: 0;
      border: 1px solid color-mix(in srgb, var(--book-binding, var(--book-back, var(--plate-accent))) 76%, #463626);
      border-radius: 1px 2px 2px 1px;
      background: var(--book-binding, var(--book-back, var(--plate-accent)));
      transform: translateZ(calc(var(--book-half-depth) * -1)) rotateY(180deg);
    }

    .bookplate__book-spine {
      top: 0;
      bottom: 0;
      left: 0;
      width: var(--book-depth);
      z-index: 4;
      border-block: 1px solid color-mix(in srgb, var(--book-binding, var(--book-spine, var(--plate-accent))) 72%, #3c2e21);
      background:
        linear-gradient(90deg, rgba(255,255,255,.18), transparent 25%, rgba(0,0,0,.22)),
        var(--book-binding, var(--book-spine, var(--plate-accent)));
      box-shadow: inset -2px 0 rgba(0,0,0,.08);
      transform: translateX(calc(var(--book-half-depth) * -1)) rotateY(-90deg);
      transform-origin: center center;
    }

    .bookplate__book-fore-edge {
      top: var(--book-cover-border);
      bottom: var(--book-cover-border);
      right: 0;
      width: var(--book-depth);
      z-index: 2;
      border-block: 1px solid rgba(107, 90, 67, .2);
      background:
        repeating-linear-gradient(180deg, rgba(112, 94, 69, .11) 0 1px, transparent 1px 4px),
        linear-gradient(90deg, #fffefa, #eee9df 74%, #d9d1c4);
      box-shadow: inset -2px 0 3px rgba(65, 49, 35, .14);
      transform: translateX(var(--book-half-depth)) rotateY(90deg);
      transform-origin: center center;
    }

    .bookplate__book-top-edge,
    .bookplate__book-bottom-edge {
      left: var(--book-cover-border);
      right: var(--book-cover-border);
      height: var(--book-depth);
      z-index: 3;
      border-inline: 1px solid rgba(107, 90, 67, .16);
      background:
        linear-gradient(90deg, var(--book-binding, var(--plate-accent)) 0 var(--book-cover-border), transparent var(--book-cover-border)),
        repeating-linear-gradient(90deg, rgba(112, 94, 69, .09) 0 1px, transparent 1px 5px),
        linear-gradient(180deg, #fffefa, #eee9df 72%, #d7cfc2);
    }

    .bookplate__book-top-edge {
      top: 0;
      transform: translateY(calc(var(--book-half-depth) * -1)) rotateX(90deg);
      transform-origin: center center;
    }

    .bookplate__book-bottom-edge {
      bottom: 0;
      transform: translateY(var(--book-half-depth)) rotateX(-90deg);
      transform-origin: center center;
      background:
        linear-gradient(90deg, var(--book-binding, var(--plate-accent)) 0 var(--book-cover-border), transparent var(--book-cover-border)),
        repeating-linear-gradient(90deg, rgba(112, 94, 69, .08) 0 1px, transparent 1px 5px),
        linear-gradient(0deg, #fffefa, #ece6dc 72%, #d3cabd);
    }

    .bookplate__cover,
    .bookplate__cover-fallback {
      grid-area: 1 / 1;
      width: 100%;
      height: 100%;
    }

    .bookplate__cover {
      display: block;
      object-fit: contain;
      background: var(--book-binding, #cfc1aa);
    }

    .bookplate__cover[hidden],
    .bookplate__cover-fallback[hidden] {
      display: none;
    }

    .bookplate__cover-fallback {
      place-items: center;
      align-content: center;
      gap: 12px;
      padding: 24px 18px;
      color: var(--book-ink);
      background:
        linear-gradient(135deg, rgba(255,255,255,.15), transparent 35%),
        var(--book-binding, #cfc1aa);
      text-align: center;
    }

    .bookplate__cover-fallback:not([hidden]) { display: grid; }

    .bookplate__cover-fallback span {
      font-family: var(--font-display);
      font-size: 1.45rem;
      line-height: 1.05;
    }

    .bookplate__cover-fallback small {
      font-size: .72rem;
      color: var(--book-ink);
    }


.bookplate__details { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: 12px 0; text-align: left; }
.bookplate__ornament {
  display: flex; align-items: center; gap: 12px;
  margin: 0 0 24px;
  color: var(--plate-muted);
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .1em;
}
.bookplate__ornament::before { content: "Ex libris"; text-transform: uppercase; }
.bookplate__ornament::after { content: ""; width: 48px; height: 1px; background: var(--plate-rule); }
.bookplate__title {
  width: 100%; margin: 0;
  font-family: var(--font-display); font-size: var(--type-step-3); font-weight: 500;
  font-optical-sizing: auto; line-height: 1.08; letter-spacing: -.035em;
  overflow-wrap: anywhere; text-wrap: balance;
}
.bookplate__author { margin: 16px 0 0; color: var(--plate-muted); font-size: var(--type-sm); line-height: 1.5; font-variant-caps: all-small-caps; letter-spacing: .055em; }
.bookplate__pages { display: flex; flex-wrap: wrap; gap: 8px 0; margin: 18px 0 0; color: var(--plate-muted); font-family: var(--font-mono); font-size: .72rem; line-height: 1.65; }
.bookplate__pages > * + *::before { content: "·"; margin: 0 10px; }
.bookplate__description { width: 100%; max-width: 66ch; margin: 26px 0 20px; color: var(--plate-text); font-size: var(--type-body); line-height: 1.75; overflow-wrap: anywhere; white-space: pre-line; }
.bookplate__link { display: inline-flex; gap: 12px; align-items: center; min-height: 44px; color: var(--plate-link); font-size: var(--type-sm); font-weight: 500; text-decoration-line: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.bookplate__link::after { content: "↗"; display: inline-block; text-decoration: none; transition: transform var(--duration-quick) var(--ease-press); }
.bookplate__link:hover::after { transform: translate(2px, -2px); }
.bookplate__close { position: absolute; top: 18px; right: 18px; z-index: 3; width: 44px; height: 44px; display: grid; place-items: center; padding: 0; border: 0; background: transparent; color: var(--plate-muted); cursor: pointer; }
.bookplate__close svg { width: 20px; height: 20px; stroke: currentColor; stroke-width: 1.5; fill: none; transition: transform var(--duration-normal) var(--ease-settle); }
.bookplate__close:hover svg { transform: rotate(90deg); }
.bookplate :focus-visible { outline-color: var(--plate-focus); }
.bookplate.is-transitioning .bookplate__card { transition: none; transform: none; }
::view-transition-group(book-cover) { animation-duration: 340ms; animation-timing-function: var(--ease-reveal); }
::view-transition-group(root) { animation-duration: 220ms; }
@media (prefers-reduced-motion: reduce) {
  .bookplate, .bookplate__card, .bookplate__close svg, .bookplate__link::after { transition: none; }
  .bookplate__card, .bookplate.is-open .bookplate__card, .bookplate__close:hover svg, .bookplate__link:hover::after { transform: none; }
  ::view-transition-group(*) { animation: none; }
}