/* The room: a wall of shelves, and the books you have opened standing on them.
   A book shows its spine, as books on a shelf do. Reach for one and it comes
   out and turns to face you. */

.home { display: block; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---- the bar ------------------------------------------------------------- */

.hall-bar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: flex-start; gap: 22px;
  padding: 16px 30px; border-bottom: 1px solid var(--rule-soft);
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  backdrop-filter: blur(10px);
}
.hall-mark {
  flex: 0 0 auto; margin-top: 15px;
  font-family: var(--sans); font-size: 11px; letter-spacing: .24em;
  text-transform: uppercase; color: var(--paper-faint); text-decoration: none;
}
.hall-mark:hover { color: var(--ember); }
.hall-bar .theme-btn { margin-top: 12px; }

/* ---- the paste field ----------------------------------------------------- */

.paste { flex: 1; min-width: 0; max-width: 620px; margin: 0 auto; position: relative; }
.paste-field {
  display: flex; align-items: stretch;
  border: 1px solid var(--rule); background: var(--ink-2);
  transition: border-color .18s, box-shadow .18s;
}
.paste-field:focus-within {
  border-color: var(--ember-soft);
  box-shadow: 0 0 0 3px var(--ember-wash);
}
.paste-field input {
  flex: 1; min-width: 0;
  background: none; border: 0; outline: none;
  font-family: var(--mono); font-size: 13px; color: var(--paper);
  padding: 13px 15px;
}
.paste-field input::placeholder { color: var(--paper-faint); opacity: .75; }
.paste-field button {
  flex: 0 0 auto;
  font-family: var(--sans); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
  background: none; border: 0; border-left: 1px solid var(--rule);
  color: var(--ember); padding: 0 22px; cursor: pointer; transition: background .18s;
}
.paste-field button:hover { background: var(--ember-wash); }
.paste-hint {
  font-family: var(--sans); font-size: 11px; color: var(--paper-faint);
  margin: 8px 2px 0; min-height: 1.3em;
}
.paste-hint.err { color: var(--ember); }
.paste-hint.busy::after {
  content: ''; display: inline-block; width: 5px; height: 5px; margin-left: 7px;
  border-radius: 50%; background: var(--ember); animation: pulse 1s ease-in-out infinite;
  vertical-align: middle;
}

.results {
  position: absolute; left: 0; right: 0; top: calc(100% - 18px); z-index: 45;
  border: 1px solid var(--rule); background: var(--ink-2); box-shadow: var(--shadow-panel);
}
.result {
  display: flex; gap: 13px; align-items: center; width: 100%; text-align: left;
  padding: 12px 14px; text-decoration: none; color: inherit;
  border-bottom: 1px solid var(--rule-soft);
}
.result:last-child { border-bottom: 0; }
.result:hover, .result.on { background: var(--wash); }
.result-art {
  flex: 0 0 auto; width: 44px; height: 44px; background: var(--ink-3);
  border: 1px solid var(--rule-soft); overflow: hidden;
}
.result-art img { width: 100%; height: 100%; object-fit: cover; filter: var(--img-thumb); }
.result-body { min-width: 0; flex: 1; }
.result-title { font-size: .98rem; line-height: 1.25; }
.result-desc {
  font-family: var(--sans); font-size: 10.5px; color: var(--paper-faint);
  line-height: 1.4; margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.result-lang {
  flex: 0 0 auto; font-family: var(--sans); font-size: 9.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gold);
  border: 1px solid var(--rule); border-radius: 999px; padding: 3px 8px;
}
.result-go {
  flex: 0 0 auto; font-family: var(--sans); font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ember);
}
.result.preview { padding: 16px 14px; }
.result.preview .result-art { width: 64px; height: 64px; }
.result.preview .result-title { font-size: 1.16rem; }
.result.preview .result-desc { white-space: normal; }
.result-warn {
  padding: 11px 14px; font-family: var(--sans); font-size: 11px; line-height: 1.5;
  color: var(--paper-faint); border-top: 1px solid var(--rule-soft); background: var(--ember-wash);
}

/* ---- the room ------------------------------------------------------------ */

.room { padding: 40px 30px 80px; }

/*
 * Rows are uniform boxes, which is what lets one repeating gradient draw every
 * shelf board: each book occupies a cell exactly one row tall and stands on the
 * board at its foot. No row measurement in JS, no boards drifting out of step.
 */
.shelves {
  --row: 326px;
  --board: 13px;
  --shelf-face: color-mix(in srgb, var(--ink-3) 82%, var(--paper) 6%);
  --shelf-lip: color-mix(in srgb, var(--ink) 70%, #000 30%);

  display: flex; flex-wrap: wrap; align-items: flex-end; gap: 0;
  perspective: 1700px; perspective-origin: 50% 42%;
  background:
    repeating-linear-gradient(180deg,
      transparent 0,
      transparent calc(var(--row) - var(--board)),
      var(--shelf-face) calc(var(--row) - var(--board)),
      var(--shelf-face) calc(var(--row) - 3px),
      var(--shelf-lip) calc(var(--row) - 3px),
      var(--shelf-lip) var(--row));
  min-height: var(--row);
}
:root[data-theme="light"] .shelves {
  --shelf-face: color-mix(in srgb, var(--ink-3) 88%, #7a5c33 12%);
  --shelf-lip: color-mix(in srgb, #7a5c33 40%, var(--ink-3) 60%);
}

.shelf-loading, .shelf-empty {
  font-family: var(--sans); font-size: 12.5px; color: var(--paper-faint);
  padding: 40px 4px; max-width: 40rem; line-height: 1.65;
}
.shelf-empty b { color: var(--paper); font-weight: 500; }

/* ---- a volume ------------------------------------------------------------ */

.vol {
  height: var(--row);
  display: flex; align-items: flex-end;
  padding-bottom: var(--board);
  /* The turned-out book overhangs its neighbours; nothing may clip it. */
  position: relative;
}
.vol + .vol { margin-left: 3px; }

.vol-inner {
  position: relative;
  width: var(--w); height: var(--h);
  transform-style: preserve-3d;
  /* Hinged at the spine's outer edge — the same edge the front cover swings on,
     so the book turns about itself instead of sliding sideways. */
  transform-origin: 100% 50%;
  transition: transform .52s cubic-bezier(.22, .72, .2, 1);
  cursor: pointer;
}
.vol:hover, .vol:focus-within { z-index: 30; }
.vol:hover .vol-inner,
.vol:focus-within .vol-inner {
  transform: translateZ(96px) rotateY(-66deg);
}

/* The spine: what you see on a shelf. */
.vol-spine {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center;
  justify-content: space-between; gap: 8px;
  padding: 11px 0 9px;
  background:
    linear-gradient(90deg,
      rgba(0,0,0,.34) 0%, rgba(0,0,0,.05) 16%,
      rgba(255,255,255,.07) 46%, rgba(0,0,0,.12) 82%, rgba(0,0,0,.4) 100%),
    var(--hue);
  border-radius: 1px 2px 2px 1px;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.22);
  overflow: hidden;
}
.vol-spine::before, .vol-spine::after {
  content: ''; position: absolute; left: 4px; right: 4px; height: 1px;
  background: var(--gold); opacity: .5;
}
.vol-spine::before { top: 26px; }
.vol-spine::after { bottom: 24px; }

.vol-title {
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: var(--serif); font-size: 13px; line-height: 1.15;
  color: #f2ead9; letter-spacing: .01em;
  text-shadow: 0 1px 2px rgba(0,0,0,.5);
  max-height: calc(var(--h) - 84px);
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.vol-lang {
  font-family: var(--sans); font-size: 8px; letter-spacing: .12em;
  text-transform: uppercase; color: rgba(255,255,255,.6);
}
.vol-mark { width: 5px; height: 5px; border-radius: 50%; background: var(--gold); opacity: .75; }

/* The front cover: hinged on the spine's outer edge, lying back into the shelf
   until the book is reached for. */
.vol-front {
  position: absolute; top: 0; left: 100%;
  width: var(--fw); height: 100%;
  transform-origin: 0 50%;
  transform: rotateY(90deg);
  background: var(--hue);
  border-radius: 1px;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.25);
  overflow: hidden;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.vol-front-art { position: absolute; inset: 0; }
.vol-front-art img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(.3) contrast(1.05) brightness(.62);
}
.vol-front-art::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.15) 0%, rgba(0,0,0,.5) 55%, rgba(0,0,0,.88) 100%);
}
.vol-front-body { position: relative; padding: 14px 14px 16px; }
.vol-front-kind {
  font-family: var(--sans); font-size: 8.5px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 6px;
}
.vol-front-title {
  font-family: var(--serif); font-size: 1.02rem; line-height: 1.18; color: #f4ecdd;
  text-shadow: 0 1px 3px rgba(0,0,0,.6);
}
.vol-front-sub {
  font-family: var(--sans); font-size: 10px; line-height: 1.4; margin-top: 5px;
  color: rgba(244,236,221,.68);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.vol-front-meta {
  font-family: var(--mono); font-size: 9px; color: rgba(244,236,221,.5); margin-top: 8px;
}

/* The pages: a sliver of edge, so the book reads as a solid object. */
.vol-pages {
  position: absolute; top: 3px; bottom: 3px; left: 100%;
  width: var(--fw); transform-origin: 0 50%;
  transform: rotateY(90deg) translateZ(-3px);
  background: repeating-linear-gradient(90deg, #d9cdb4 0 1px, #c3b799 1px 2px);
  opacity: .55;
}

/* Spine hues by archetype — a shelf you can read at a glance. */
.vol[data-kind="battle"]  { --hue: linear-gradient(180deg, #5c2320, #3d1614); }
.vol[data-kind="person"]  { --hue: linear-gradient(180deg, #26384a, #16222e); }
.vol[data-kind="country"] { --hue: linear-gradient(180deg, #26432f, #16281d); }
.vol[data-kind="place"]   { --hue: linear-gradient(180deg, #1f4148, #12282d); }
.vol[data-kind="generic"] { --hue: linear-gradient(180deg, #3d372c, #241f19); }

.vol.unread .vol-spine { opacity: .82; }
.vol.unread .vol-mark { background: var(--paper-faint); opacity: .5; }

/* ---- colophon ------------------------------------------------------------ */

.colophon-strip {
  margin-top: 64px; border-top: 1px solid var(--rule-soft); padding-top: 24px;
  max-width: 52rem;
}
.colophon-strip p {
  font-family: var(--sans); font-size: 12px; line-height: 1.7; color: var(--paper-faint);
  margin: 0 0 12px;
}
.colophon-strip b { color: var(--paper-dim); font-weight: 500; }
.colophon-legal a { color: var(--paper-dim); }
.colophon-legal a:hover { color: var(--ember); }

@media (max-width: 860px) {
  .hall-bar { flex-wrap: wrap; gap: 10px 14px; padding: 12px 18px; }
  .hall-mark { margin-top: 0; }
  .paste { order: 3; flex-basis: 100%; max-width: none; }
  .hall-bar .theme-btn { margin-top: 0; margin-left: auto; }
  .room { padding: 26px 18px 60px; }
  .shelves { --row: 268px; perspective: 1100px; }
  .vol:hover .vol-inner, .vol:focus-within .vol-inner {
    transform: translateZ(56px) rotateY(-62deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .vol-inner { transition: none; }
}