/* ============================================================
   THE GLASS MUSEUM — Bhanu Build-Tech
   Stage 0: outside, one glowing window at night.
   Stage 1: a grand classical hall (Louvre register) that loops:
   oxblood walls, cream wainscot, parquet, benches, chandelier,
   vitrine, rope barriers. Photographic rooms; the stained glass
   works are hung on the walls under real light pools.
   ============================================================ */

:root {
  --copper: oklch(0.68 0.13 48);
  --copper-glow: oklch(0.74 0.13 55);
  --navy-0: oklch(0.16 0.04 252);
  --room-dark: #14100d;
  --ink: oklch(0.92 0.022 80);
  --ink-dim: oklch(0.66 0.03 72);
  --card: #f3ecdf;            /* museum label stock */
  --card-ink: #2a241c;
  --card-dim: #6c6253;
  --font-display: "Archivo", sans-serif;
  --font-body: "Schibsted Grotesk", sans-serif;
  --font-mono: "Fragment Mono", monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --enter-ease: cubic-bezier(0.65, 0, 0.18, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }
body.museum-body {
  background: var(--room-dark);
  color: var(--ink);
  font-family: var(--font-body);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: var(--font-mono); letter-spacing: 0.16em; font-size: 0.6rem; }

.skip-link {
  position: absolute; left: -9999px; z-index: 300;
  background: var(--copper); color: var(--navy-0);
  padding: 0.6rem 1rem; text-decoration: none;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* film grain */
body.museum-body::after {
  content: "";
  position: fixed; inset: -50%;
  width: 200%; height: 200%;
  pointer-events: none; z-index: 250;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 8s steps(10) infinite;
}
@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); }
  60% { transform: translate(-2%, -2%); }
  80% { transform: translate(3%, 3%); }
}

/* ============ STAGE 0 · OUTSIDE ============ */
.entry {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: flex-end; justify-content: center;
  overflow: hidden;
  transform-origin: 50% 46%;
  transition:
    transform 1.9s var(--enter-ease),
    opacity 1.4s ease 0.45s,
    filter 1.9s var(--enter-ease);
}
.entry__bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: 50% 42%;
}
.entry__veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(54% 60% at 50% 44%, transparent 30%, rgba(4, 5, 9, 0.55) 100%),
    linear-gradient(to top, rgba(4, 5, 9, 0.88) 0%, rgba(4, 5, 9, 0.25) 36%, transparent 60%);
}
.entry__content {
  position: relative; z-index: 2;
  text-align: center;
  padding-bottom: clamp(3rem, 9vh, 6.5rem);
  max-width: 36rem;
}
.entry__kicker { color: var(--ink-dim); }
.entry__title {
  font-family: var(--font-display);
  font-weight: 640; font-stretch: 115%;
  font-size: clamp(2.6rem, 6.4vw, 4.6rem);
  line-height: 1.02; letter-spacing: -0.02em;
  margin-top: 1rem;
}
.entry__title em { font-style: italic; color: var(--copper-glow); }
.entry__sub {
  color: var(--ink-dim);
  margin-top: 1rem; font-size: 1rem; line-height: 1.7;
}
.entry__btn {
  display: inline-flex; align-items: center; gap: 0.7rem;
  margin-top: 2.2rem;
  font-family: var(--font-body);
  font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--copper-glow);
  background: oklch(0.16 0.04 252 / 0.42);
  border: 1px solid color-mix(in oklch, var(--copper) 75%, transparent);
  border-radius: 2px;
  padding: 1rem 2.3rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.45s, color 0.45s, border-color 0.45s, transform 0.35s var(--ease-out);
}
.entry__btn:hover, .entry__btn:focus-visible {
  background: var(--copper);
  color: var(--navy-0);
  border-color: var(--copper);
  transform: translateY(-2px);
}
.entry__btn svg { transition: transform 0.35s var(--ease-out); }
.entry__btn:hover svg { transform: translateX(4px); }

body.entered .entry {
  transform: scale(3.1);
  opacity: 0;
  filter: brightness(1.7) blur(8px);
  pointer-events: none;
}

/* ============ STAGE 1 · THE HALL ============ */
.museum {
  position: fixed; inset: 0; z-index: 50;
  opacity: 0;
  transform: scale(1.07);
  filter: blur(6px);
  transition:
    opacity 1.5s ease 0.55s,
    transform 1.9s var(--enter-ease) 0.35s,
    filter 1.7s var(--enter-ease) 0.45s;
}
body.entered .museum {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

.site-header { position: absolute; top: 0; left: 0; right: 0; z-index: 30; }
.museum-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(1.4rem, 4vw, 3rem);
  background: linear-gradient(to bottom, rgba(16, 12, 9, 0.62), transparent);
}
.museum-nav__back, .museum-nav__contact {
  display: inline-flex; align-items: center; gap: 0.5rem;
  color: oklch(0.95 0.02 80); text-decoration: none;
  font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.7);
  transition: color 0.35s;
}
.museum-nav__back:hover, .museum-nav__contact:hover { color: var(--copper-glow); }
.museum-nav__contact {
  color: var(--copper-glow);
  border: 1px solid color-mix(in oklch, var(--copper) 65%, transparent);
  border-radius: 2px;
  padding: 0.55rem 1.3rem;
  background: rgba(16, 12, 9, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.35s, background 0.35s, color 0.35s;
}
.museum-nav__contact:hover {
  border-color: var(--copper);
  background: var(--copper);
  color: var(--navy-0);
}
.museum-nav__logo img { display: block; filter: drop-shadow(0 1px 8px rgba(0, 0, 0, 0.6)); }

/* ---- the hall ---- */
.museum-wall {
  position: absolute; inset: 0;
  overflow: hidden;
  cursor: grab;
  background: var(--room-dark);
}
.museum-wall.dragging { cursor: grabbing; }

.wall-track {
  position: absolute; left: 0; top: 0; bottom: 0;
  display: flex;
  list-style: none;
  will-change: transform;
}

/* one photographic room section, exact 16:9 fill */
.room {
  position: relative;
  flex: none;
  height: 100vh;
  width: 175vh;            /* 1344/768 */
  outline: none;
}
.room__bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}

/* ---- hung artwork ---- */
.art {
  position: absolute;
  left: var(--x); top: var(--y);
  height: var(--h);
  transform: translate(-50%, -50%);
  outline: none;
}
.art > img {
  height: 100%; width: auto; display: block;
  border-radius: 1px;
  box-shadow:
    0 10px 32px rgba(20, 8, 4, 0.55),
    0 2px 8px rgba(20, 8, 4, 0.45);
  transition: filter 0.7s var(--ease-out), box-shadow 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
/* hover / focus: the backlight comes up */
.art:hover > img,
.art:focus-visible > img,
.art:focus-within > img {
  filter: brightness(1.12) saturate(1.06);
  box-shadow:
    0 10px 36px rgba(20, 8, 4, 0.55),
    0 0 54px rgba(255, 190, 120, 0.38);
  transform: scale(1.015);
}

/* ---- museum label card ---- */
.art__label {
  position: absolute;
  top: calc(100% + 2.4vh);
  left: 50%;
  transform: translateX(-50%);
  width: 13.5rem;
  background: var(--card);
  color: var(--card-ink);
  border-radius: 1px;
  padding: 0.7rem 0.85rem 0.75rem;
  box-shadow: 0 6px 22px rgba(20, 10, 5, 0.4);
  z-index: 5;
}
.art__title {
  font-family: var(--font-display);
  font-weight: 600; font-stretch: 108%;
  font-size: 0.86rem;
  color: var(--card-ink);
}
.art__meta {
  color: var(--card-dim);
  margin-top: 0.28rem;
  font-size: 0.54rem;
}
.art__desc {
  font-size: 0.78rem; line-height: 1.55;
  color: #463e31;
  overflow: hidden;
  max-height: 0; opacity: 0; margin-top: 0;
  transition: max-height 0.6s var(--ease-out), opacity 0.45s ease, margin-top 0.4s;
}
.art:hover .art__desc,
.art:focus-visible .art__desc,
.art:focus-within .art__desc,
[data-piece]:hover > .art__label .art__desc,
[data-piece]:focus-visible > .art__label .art__desc {
  max-height: 9rem; opacity: 1; margin-top: 0.5rem;
}

/* label variants for rooms where the object is baked into the photo */
.art__label--floor {
  top: auto; bottom: 7vh;
  left: var(--x);
}
.art__label--fixed {
  top: var(--y);
  left: var(--x);
}

/* ---- didactic wall panels (intro + commission) ---- */
.didactic {
  position: absolute;
  left: var(--x); top: var(--y);
  width: max(var(--w), 15rem);
  transform: translate(-50%, -50%);
  background: var(--card);
  color: var(--card-ink);
  border-radius: 1px;
  padding: 1.5rem 1.4rem 1.6rem;
  box-shadow: 0 12px 34px rgba(20, 10, 5, 0.45);
  z-index: 4;
}
.didactic__kicker { color: #8a6a3f; }
.didactic__title {
  font-family: var(--font-display);
  font-weight: 640; font-stretch: 112%;
  font-size: clamp(1.15rem, 1.5vw, 1.5rem);
  line-height: 1.1; letter-spacing: -0.01em;
  margin-top: 0.7rem;
  color: var(--card-ink);
}
.didactic__body {
  font-size: 0.82rem; line-height: 1.65;
  color: #463e31;
  margin-top: 0.8rem;
}
.didactic__hint { color: var(--card-dim); margin-top: 1.2rem; }
.didactic__btn {
  display: inline-block;
  margin-top: 1.1rem;
  text-decoration: none;
  font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: #7a4a1e;
  border: 1px solid #b08a52;
  border-radius: 2px;
  padding: 0.8rem 1.5rem;
  transition: background 0.4s, color 0.4s;
}
.didactic__btn:hover, .didactic__btn:focus-visible {
  background: #7a4a1e;
  color: var(--card);
}

/* ---- dust motes ---- */
.dust { position: absolute; inset: 0; z-index: 8; pointer-events: none; }

/* ---- hud ---- */
.wall-hud {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 9;
  display: flex; justify-content: space-between;
  padding: 1rem clamp(1.4rem, 4vw, 3rem);
  color: rgba(243, 236, 223, 0.5);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.7);
  pointer-events: none;
}

/* ============ REDUCED MOTION / SMALL SCREENS ============ */
@media (prefers-reduced-motion: reduce) {
  .entry, .museum { transition: opacity 0.4s ease; transform: none; filter: none; }
  body.entered .entry { transform: none; filter: none; }
  .museum { transform: none; filter: none; }
  body.museum-body::after { animation: none; }
}

@media (max-width: 700px) {
  .museum-nav__contact { display: none; }
  .wall-hud span:last-child { display: none; }
  .entry__content { padding-inline: 1.4rem; }
  .art__label { width: 11.5rem; padding: 0.6rem 0.7rem; }
  .didactic { width: 15rem; padding: 1.1rem 1rem 1.2rem; }
}