.door {
    position: absolute; left: 50%; top: 50%;
    width: 410px; height: 860px;
    margin-top: -430px;
    background:
      linear-gradient(165deg, #1c1c22 0%, #101015 45%, #17171d 100%);
    border: 1px solid rgba(232, 234, 239, 0.3);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.65), inset 0 0 70px rgba(0,0,0,0.55);
    transition: transform 2.4s cubic-bezier(0.68, 0, 0.2, 1);
    backface-visibility: visible;
  }
  .door::before {
    content: ""; position: absolute; inset: 36px 30px;
    border: 1px solid rgba(232, 234, 239, 0.16);
    box-shadow: inset 0 0 0 12px rgba(0,0,0,0.25);
  }
  .door::after {
    content: ""; position: absolute; top: 50%; margin-top: -60px;
    width: 8px; height: 120px; border-radius: 5px;
    background: linear-gradient(180deg, #eef0f5, #8a8f98 55%, #d5d8de);
    box-shadow: 0 0 16px rgba(232, 234, 239, 0.35);
  }
  .door.left { margin-left: -410px; transform-origin: left center; }
  .door.left::after { right: 18px; }
  .door.right { margin-left: 0; transform-origin: right center; }
  .door.right::after { left: 18px; }
  .door .emblem {
    position: absolute; top: 84px; left: 50%; transform: translateX(-50%);
    width: 96px; height: 96px; opacity: 0.85;
    -webkit-mask: url("../assets/beast.svg") no-repeat center / contain;
    mask: url("../assets/beast.svg") no-repeat center / contain;
    background: linear-gradient(160deg, #ffffff, #9ba0ab 55%, #d5d8de);
  }

  .entry {
    position: fixed; inset: 0; z-index: 60;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.4rem;
    background: rgba(4,4,5,0.94);
    transition: opacity 1.1s ease; text-align: center; padding: 2rem;
  }
  .entry.gone { opacity: 0; pointer-events: none; }
  .entry .beast-key {
    width: 118px; height: 118px; margin-bottom: 0.4rem;
    animation:
      key-breathe 4.5s ease-in-out 0.9s infinite;
    filter: drop-shadow(0 0 32px rgba(232, 234, 239, 0.5));
  }
  @keyframes key-breathe {
    0%, 100% { filter: drop-shadow(0 0 32px rgba(232, 234, 239, 0.5)); }
    50%      { filter: drop-shadow(0 0 14px rgba(232, 234, 239, 0.22)); }
  }
  .entry h1 { font-size: clamp(2.2rem, 6vw, 4rem); letter-spacing: 0.16em; text-transform: uppercase; }
  .entry p { color: var(--silver-dim); font-size: 0.78rem; letter-spacing: 0.3em; text-transform: uppercase; max-width: 36rem; line-height: 2.2; }

  .lightbox {
    position: fixed; inset: 0; z-index: 70;
    display: flex; align-items: center; justify-content: center; gap: 3rem;
    background: rgba(4,4,5,0.97);
    opacity: 0; pointer-events: none; transition: opacity .5s ease;
    padding: 2rem;
  }
  .lightbox.open { opacity: 1; pointer-events: auto; }
  .lightbox img {
    max-height: 84vh; max-width: min(58vw, 640px);
    box-shadow: 0 40px 120px rgba(0,0,0,0.9);
    border: 12px solid;
    border-image: linear-gradient(155deg, #f0f1f5, #6a6e77, #d5d8de) 1;
  }
  .lb-info { max-width: 300px; }
  .lb-info .no { font-family: var(--serif); color: var(--silver-drk); font-size: 0.95rem; letter-spacing: 0.4em; }
  .lb-info h2 { font-size: 2rem; letter-spacing: 0.06em; margin: 0.9rem 0 0.6rem; }
  .lb-info .meta { color: var(--silver-dim); font-size: 0.72rem; letter-spacing: 0.24em; text-transform: uppercase; line-height: 2.1; }
  .lb-nav { margin-top: 2.2rem; display: flex; gap: 1rem; }
  .lb-nav button {
    border: 1px solid var(--silver-drk); background: none; color: var(--silver);
    padding: 0.6rem 1.4rem; cursor: pointer; font-size: 0.62rem; letter-spacing: 0.3em;
    text-transform: uppercase; font-family: var(--sans); transition: all .3s;
  }
  .lb-nav button:hover { border-color: var(--white); color: var(--white); }
  .lb-close {
    position: absolute; top: 1.4rem; right: 2rem;
    background: none; border: none; color: var(--silver-dim); font-size: 1.6rem;
    cursor: pointer; transition: color .3s;
  }
  .lb-close:hover { color: var(--white); }

  .index-head { text-align: center; margin-bottom: 3rem; }
  .index-head h2 { font-size: 2rem; letter-spacing: 0.2em; text-transform: uppercase; }
  .index-grid { max-width: 1100px; margin: 0 auto; }
  .index-vol {
    font-size: 1.4rem; letter-spacing: 0.4em; text-transform: uppercase;
    text-align: center; margin: 2.6rem 0 1.4rem; padding-left: 0.4em;
  }
  .index-vol:first-child { margin-top: 0; }
  .index-vol-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1.4rem;
  }
  .index-grid figure { cursor: pointer; text-align: center; }
  .index-grid img {
    width: 100%; aspect-ratio: 3/5; object-fit: cover; display: block;
    border: 1px solid var(--hairline); filter: brightness(.85); transition: filter .3s, border-color .3s;
  }
  .index-grid figure:hover img { filter: brightness(1.05); border-color: var(--silver-dim); }
  .index-grid figcaption { margin-top: 0.55rem; font-size: 0.6rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--silver-dim); }

  .notice {
    position: fixed; inset: 0; z-index: 70;
    display: flex; align-items: center; justify-content: center;
    background: rgba(4,4,5,0.97);
    opacity: 0; pointer-events: none; transition: opacity .4s ease; padding: 2rem;
  }
  .notice.open { opacity: 1; pointer-events: auto; }
  .notice .card {
    max-width: 26rem; text-align: center; padding: 3.2rem 2.8rem;
    border: 1px solid var(--hairline); outline: 1px solid var(--hairline-2); outline-offset: 6px;
    background: #0a0a0c;
  }
  .notice h2 { font-size: 1.7rem; letter-spacing: 0.08em; margin-bottom: 0.9rem; }
  .notice p { color: var(--silver-dim); font-size: 0.82rem; line-height: 2; }
  .notice .btn { margin-top: 2rem; }


/* Canonical gallery catalogues, with the original hinged-door entrance. */
html { scroll-padding-top: var(--site-nav-height, 116px); }
[hidden] { display: none !important; }
.catalogue { padding: calc(var(--site-nav-height, 116px) + 3rem) 2rem 4rem; min-height: 100vh; }
.index-head { text-align: center; margin-bottom: 3rem; }
.index-head h1 { font-size: clamp(1.8rem, 6vw, 2.5rem); letter-spacing: .16em; text-transform: uppercase; }
.index-vol { text-align: center; font-size: 1.4rem; letter-spacing: .4em; margin-bottom: 1.4rem; }
.catalogue-title:focus { outline: none; }
.door-stage { position: fixed; inset: var(--site-nav-height, 116px) 0 0; z-index: 55; perspective: 1050px; overflow: hidden; background: #08080a; transition: opacity .6s ease; }
.door-portal { position: absolute; left: 50%; top: 50%; width: 0; height: 0; transform-style: preserve-3d; transform: scale(var(--door-scale, .65)); }
.door-stage.opening .door.left { transform: rotateY(-108deg); }
.door-stage.opening .door.right { transform: rotateY(108deg); }
.door-stage.finished { opacity: 0; pointer-events: none; }
body.entering { overflow: hidden; }
.catalogue .index-grid figure { margin: 0; }
.catalogue button.catalogue-card { display: block; width: 100%; color: inherit; font: inherit; background: none; border: 0; text-align: center; cursor: pointer; }
.catalogue-card:focus-visible { outline: 2px solid var(--silver); outline-offset: 6px; }
.catalogue-card .caption { display: block; margin-top: .55rem; font-size: .6rem; letter-spacing: .22em; text-transform: uppercase; color: var(--silver-dim); }
.catalogue-card:hover img, .catalogue-card:focus-visible img { filter: brightness(1.05); border-color: var(--silver-dim); }
.catalogue-card:hover .study-tile, .catalogue-card:focus-visible .study-tile { border-color: var(--silver-dim); }
.detail-overlay { visibility: hidden; }
.detail-overlay.open { visibility: visible; }
@media (max-width:760px) {
  .catalogue { padding-left: 1.2rem; padding-right: 1.2rem; }
  .lightbox { flex-direction: column; gap: 1.2rem; overflow-y: auto; justify-content: flex-start; }
  .lightbox img { max-width: 86vw; max-height: 50vh; }
  .lb-info { text-align: center; }
  .lb-nav { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .door, .door-stage, .entry, .beast-key, .detail-overlay { animation: none !important; transition: none !important; }
}

.entry { inset: var(--site-nav-height, 116px) 0 0; }
.lightbox, .notice { inset: var(--site-nav-height, 116px) 0 0; padding: 3rem 1.5rem 2rem; }
.lightbox img { object-fit: contain; max-height: calc(100dvh - var(--site-nav-height, 116px) - 7rem); }
@media(max-width:760px) { .lightbox img { max-height: 43dvh; } }