/* ==========================================================================
   OPERA — the impossible gallery room
   Layers: room (+ lit frames, wall hotspots) · 3D stage (ring + Girl Cat) · UI
   Tokens (radius, spacing, fonts, easing) come from css/base.css.
   ========================================================================== */
.oroom { position: fixed; inset: 0; z-index: 30; width: 100vw; height: 100vh; overflow: hidden; background: var(--black);
  font-family: var(--font-grotesk); color: var(--offwhite); opacity: 0; transition: opacity .7s var(--ease-out);
  --font-opera: 'IM Fell English SC', 'Cormorant Garamond', Georgia, serif; }   /* OPERA's own display face: labels, work titles */
.oroom[hidden] { display: none; }
.oroom.is-open { opacity: 1; }

/* the room: covers the screen (object-fit: cover done in JS, so hotspots stay aligned) */
.oroom__scene { position: absolute; transition: filter .9s var(--ease-out); }
.oroom__bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; user-select: none; }
.oroom.is-gallery .oroom__scene { filter: brightness(.65); }
.oroom.is-light .oroom__scene { filter: brightness(.22); }

/* people on the stairs (svg sized to the room) */
.oroom__walkers { position: absolute; inset: 0; pointer-events: none; }
.oroom__walkers .walkers { width: 100%; height: 100%; }
/* the ghosts: off-white, semi-transparent, a soft glow; the hem ripples */
.sw--ghost .sw__body { opacity: 1; }
.sw--ghost .sw__sheet { fill: rgba(248, 246, 240, .4); stroke: rgba(40, 38, 36, .26); stroke-width: .45;
  filter: drop-shadow(0 0 1.4px rgba(255, 255, 255, .6)) drop-shadow(0 2.5px 2px rgba(0, 0, 0, .16)); }
.sw--ghost .sw__eye { fill: rgba(10, 10, 10, .55); }
.sw--ghost .sw__ghost { transform-origin: 0 -2px; animation: ghost-ripple 1.4s ease-in-out infinite alternate; }
@keyframes ghost-ripple { from { transform: skewX(-4deg) scaleY(1); } to { transform: skewX(4deg) scaleY(1.04); } }
/* the devil cats: black silhouettes, big white eyes; legs trot, the tail sways */
.sw--cat .sw__body { fill: #0b0b0b; opacity: .95; }
.sw--cat .sw__tailline, .sw--cat .sw__leg { fill: none; stroke: #0b0b0b; stroke-width: 1.15; stroke-linecap: round; }
.sw--cat .sw__cateye { fill: #f4f1ea; }
.sw--cat .sw__tail { transform-origin: -8.4px -7.2px; animation: cat-tail 2.2s ease-in-out infinite alternate; }
@keyframes cat-tail { from { transform: rotate(-7deg); } to { transform: rotate(9deg); } }
.sw--cat .sw__leg--a { transform-box: fill-box; transform-origin: 50% 0; }
.sw--cat .sw__leg--b { transform-box: fill-box; transform-origin: 50% 0; }
.sw--cat.is-walking .sw__leg--a { animation: cat-leg .28s ease-in-out infinite alternate; }
.sw--cat.is-walking .sw__leg--b { animation: cat-leg .28s ease-in-out infinite alternate-reverse; }
@keyframes cat-leg { from { transform: rotate(-26deg); } to { transform: rotate(26deg); } }
.sw--cat .sw__cateye { animation: cat-blink 5.3s linear infinite; transform-box: fill-box; transform-origin: center; }
@keyframes cat-blink { 0%, 92%, 97%, 100% { transform: scaleY(1); } 94.5% { transform: scaleY(.12); } }
/* pale variant: the same cats as white ghosts */
.sw--cat.sw--pale .sw__body { fill: rgba(248, 246, 240, .62); opacity: 1; filter: drop-shadow(0 0 1.4px rgba(255, 255, 255, .8)) drop-shadow(0 2px 2px rgba(0, 0, 0, .28)); }
.sw--cat.sw--pale .sw__tailline, .sw--cat.sw--pale .sw__leg { stroke: rgba(248, 246, 240, .7); }
.sw--cat.sw--pale .sw__cateye { fill: rgba(10, 10, 10, .8); }
@media (prefers-reduced-motion: reduce) { .sw--ghost .sw__ghost, .sw--cat .sw__tail, .sw--cat .sw__leg, .sw--cat .sw__cateye { animation: none !important; } }

/* depth of field behind Girl Cat: blurs what is under it, feathered on every side */
.oroom__dof { position: absolute; top: -2%; bottom: -2%; pointer-events: none;
  -webkit-backdrop-filter: blur(var(--dof-blur, 3px)); backdrop-filter: blur(var(--dof-blur, 3px));
  background: rgba(241, 237, 228, var(--dof-haze, .05));          /* a breath of air between her and the room */
  /* eased feather (several stops ≈ a smooth S-curve: no visible start or end of the fade) */
  --f: var(--dof-feather, 40%);
  --m: linear-gradient(90deg, transparent 0, rgba(0,0,0,.05) calc(var(--f) * .2), rgba(0,0,0,.22) calc(var(--f) * .42),
       rgba(0,0,0,.55) calc(var(--f) * .64), rgba(0,0,0,.86) calc(var(--f) * .84), #000 var(--f),
       #000 calc(100% - var(--f)), rgba(0,0,0,.86) calc(100% - var(--f) * .84), rgba(0,0,0,.55) calc(100% - var(--f) * .64),
       rgba(0,0,0,.22) calc(100% - var(--f) * .42), rgba(0,0,0,.05) calc(100% - var(--f) * .2), transparent 100%);
  -webkit-mask-image: var(--m), linear-gradient(180deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-composite: source-in;
  mask-image: var(--m), linear-gradient(180deg, transparent, #000 10%, #000 90%, transparent);
  mask-composite: intersect; }

/* light from the high window: a fan of soft rays from the source, fading as it falls;
   added as light (screen), slowly breathing; two fans drift against each other */
.oroom__rays { position: absolute; pointer-events: none; mix-blend-mode: screen; opacity: var(--ray-strength, .5);
  /* fades in below the source (no hard top) and out as it falls */
  --rm: linear-gradient(180deg, transparent 0%, #000 10%, #000 48%, rgba(0,0,0,.7) 72%, rgba(0,0,0,.28) 90%, transparent 100%);
  -webkit-mask-image: var(--rm); mask-image: var(--rm);
  animation: rays-breathe var(--ray-dur, 9s) ease-in-out infinite; }
.oroom__rays-fan { position: absolute; inset: 0; filter: blur(5px);
  background: conic-gradient(from calc(180deg - var(--spread)) at 50% 0%,
    transparent 0deg,
    rgba(255, 250, 240, .5) calc(var(--spread) * .15), transparent calc(var(--spread) * .3),
    rgba(255, 250, 240, .75) calc(var(--spread) * .48), rgba(255, 250, 240, .3) calc(var(--spread) * .66),
    rgba(255, 250, 240, .9) calc(var(--spread) * .9), rgba(255, 250, 240, .95) calc(var(--spread) * 1.1),
    rgba(255, 250, 240, .35) calc(var(--spread) * 1.3), rgba(255, 250, 240, .7) calc(var(--spread) * 1.5),
    transparent calc(var(--spread) * 1.7), rgba(255, 250, 240, .3) calc(var(--spread) * 1.85), transparent calc(var(--spread) * 2),
    transparent 360deg);
  transform-origin: 50% 0; animation: rays-drift 14s ease-in-out infinite alternate; }
.oroom__rays-fan--b { opacity: .8; filter: blur(12px); transform: rotate(3deg); animation-duration: 19s; animation-direction: alternate-reverse; }
.oroom__rays-glow { position: absolute; left: 50%; top: 4%; width: 55%; height: 22%; translate: -50% 0;
  background: radial-gradient(ellipse at center, rgba(255, 252, 245, .55), transparent 70%); filter: blur(6px); }
@keyframes rays-breathe { 0%, 100% { opacity: var(--ray-strength, .5); } 50% { opacity: calc(var(--ray-strength, .5) * .72); } }
@keyframes rays-drift { from { transform: rotate(-1.6deg); } to { transform: rotate(1.6deg); } }
.oroom.is-light .oroom__rays { opacity: .15; }
@media (prefers-reduced-motion: reduce) { .oroom__rays, .oroom__rays-fan { animation: none !important; } }

/* the empty frames: a faint glow on the hovered wall, red light when its gallery opens */
.oroom__frames { position: absolute; inset: 0; pointer-events: none; }
.oframe { position: absolute; border-radius: 3px; opacity: 0; mix-blend-mode: screen;
  background: radial-gradient(ellipse at center, rgba(212, 15, 22, .55), rgba(138, 11, 16, .3) 55%, rgba(80, 0, 4, .12));
  box-shadow: 0 0 18px 4px rgba(212, 15, 22, .35); transition: opacity .35s ease; }
.oframe.is-hover { opacity: .28; transition-delay: 0s !important; }
.oframe.is-lit { opacity: .95; }
.oroom.is-light .oframe.is-lit { opacity: .35; }

/* the five walls: invisible buttons shaped like the walls */
.oroom__walls { position: absolute; inset: 0; }
.owall { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; padding: 0; margin: 0; background: transparent;
  cursor: pointer; transition: background .4s ease; }
.owall.is-hot { background: rgba(241, 237, 228, .045); }
.owall:focus-visible { outline: none; background: rgba(212, 15, 22, .08); }
.oroom.is-gallery .oroom__walls { pointer-events: auto; }
.owall__label { position: absolute; transform: translate(-50%, calc(-50% + 6px)); opacity: 0; pointer-events: none; white-space: nowrap;
  font: 400 clamp(15px, 1.4vw, 22px)/1 var(--font-opera); letter-spacing: .26em; padding-left: .26em; color: var(--offwhite);
  text-shadow: 0 1px 14px rgba(0, 0, 0, .95), 0 0 3px rgba(0, 0, 0, .9); transition: opacity .35s ease, transform .35s var(--ease-out); }
.owall__label::after { content: ''; display: block; height: 2px; width: 0; margin: 10px auto 0; background: var(--red); transition: width .5s var(--ease-out) .05s; }
.owall__label.is-on { opacity: 1; transform: translate(-50%, -50%); }
.owall__label.is-on::after { width: 42%; }

/* 3D stage: Girl Cat, then the ring on top of her — the works always pass in front */
.oroom__stage { position: absolute; inset: 0; pointer-events: none; perspective: 1300px; touch-action: pan-y; }
.oroom.is-gallery .oroom__stage { pointer-events: auto; cursor: grab; }
.oroom__stage.is-grabbing { cursor: grabbing; }
.oring { position: absolute; left: 50%; top: 50%; width: 0; height: 0; transform-style: preserve-3d; outline: none;
  transform: rotateX(calc(var(--tilt, 11deg) * -1)); }
.oring:not(.is-in) { display: none; }
.owork { position: absolute; left: 0; top: 0; padding: 0; border: 0; cursor: pointer; background: var(--grey-field);
  border-radius: calc(var(--radius-medium) * var(--mag, 1)); overflow: hidden; backface-visibility: hidden; opacity: .8; filter: brightness(.62);
  will-change: transform; box-shadow: 0 0 0 calc(1px * var(--mag, 1)) rgba(241, 237, 228, .08); }
/* (the works are laid out --mag × bigger and scaled back on the ring: every size on them is × --mag) */
.owork img { display: block; width: 100%; height: 100%; object-fit: cover; }
/* motion works: the muted loop over the poster (shown once it plays), a small play mark */
.owork__vid { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .4s ease; pointer-events: none; }
.owork.is-playing .owork__vid { opacity: 1; }
.owork__play { position: absolute; right: calc(14px * var(--mag, 1)); bottom: calc(14px * var(--mag, 1)); width: calc(30px * var(--mag, 1)); height: calc(30px * var(--mag, 1));
  border-radius: 50%; background: rgba(10, 10, 10, .55); box-shadow: 0 0 0 calc(1px * var(--mag, 1)) rgba(241, 237, 228, .5); transition: opacity .4s ease; }
.owork__play::after { content: ''; position: absolute; left: 38%; top: 30%; border-style: solid; border-color: transparent transparent transparent #f1ede4;
  border-width: calc(6px * var(--mag, 1)) 0 calc(6px * var(--mag, 1)) calc(10px * var(--mag, 1)); }
.owork.is-playing .owork__play { opacity: 0; }
.owork.is-active { opacity: 1; filter: none; box-shadow: 0 0 0 calc(1px * var(--mag, 1)) rgba(241, 237, 228, .3), 0 0 calc(26px * var(--mag, 1)) rgba(212, 15, 22, .25); }
.owork:focus-visible { outline: none; box-shadow: 0 0 0 calc(2px * var(--mag, 1)) var(--red); }
.owork.is-lifted { opacity: 0 !important; }
.owork__ph { position: absolute; inset: 0; display: flex; align-items: flex-end; padding: 12%; background: var(--grey-field);
  font: 500 calc(11px * var(--mag, 1))/1.3 var(--font-grotesk); letter-spacing: .2em; color: var(--grey); text-align: left; }
.owork:nth-child(3n+2) .owork__ph { background: var(--paper-field); color: #6e6a64; }
.owork__ph::before { content: ''; position: absolute; inset: calc(8px * var(--mag, 1)); border: calc(1px * var(--mag, 1)) solid currentColor; opacity: .25; border-radius: calc((var(--radius-medium) - 8px) * var(--mag, 1)); }

/* Girl Cat floating, behind the ring */
.ogirl { position: absolute; transform: translate(-50%, -50%); pointer-events: none; transition: filter .8s ease; }
/* the body floats; inside it the animation (canvas, js/opera/girl-anim.js) replaces the still once loaded */
.ogirl__body { position: relative; height: 100%; animation: gc-float var(--float-dur, 6.5s) ease-in-out infinite; }
.ogirl__still { display: block; height: 100%; width: auto; filter: drop-shadow(0 18px 24px rgba(0, 0, 0, .35)); transition: opacity .6s ease; }
.ogirl__live { position: absolute; left: 50%; top: 0; height: 100%; transform: translateX(-50%); }
.ogirl__anim { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; transition: opacity .6s ease; }
.ogirl__shadow, .ogirl__glow { position: absolute; max-width: none; opacity: 0; transition: opacity .6s ease; pointer-events: none; }
.ogirl__shadow { transform: translateY(18px); }
.ogirl.is-alive .ogirl__anim, .ogirl.is-alive .ogirl__shadow { opacity: 1; }
.ogirl.is-alive .ogirl__still { opacity: 0; }
@keyframes gc-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  30% { transform: translateY(calc(var(--float, 8px) * -.6)) rotate(-.35deg); }
  50% { transform: translateY(calc(var(--float, 8px) * -1)) rotate(0deg); }
  75% { transform: translateY(calc(var(--float, 8px) * -.4)) rotate(.3deg); }
}
.oroom.is-light .ogirl { filter: brightness(.35); }

/* Girl Cat's upper half: back to TENET. A red halo on her, the word beside her head */
.ogirl-hit { position: absolute; pointer-events: auto; border: 0; padding: 0; background: transparent; cursor: pointer;
  border-radius: 45% 45% 30% 30%; }
.ogirl-hit:focus-visible { outline: 1px solid rgba(241, 237, 228, .5); outline-offset: 4px; }
.oroom.is-gallery .ogirl-hit { pointer-events: none; visibility: hidden; }
.ogirl__still { transition: filter .45s ease, opacity .6s ease; }
.ogirl.is-hot .ogirl__still { filter: drop-shadow(0 0 10px rgba(212, 15, 22, .55)) drop-shadow(0 18px 24px rgba(0, 0, 0, .35)) brightness(1.05); }
.ogirl__glow { transition: opacity .45s ease; }
.ogirl.is-alive.is-hot .ogirl__glow { opacity: .75; }
.ogirl-label { position: absolute; opacity: 0; transform: translate(0, calc(-50% + 6px)); pointer-events: none; white-space: nowrap;
  font: 400 clamp(15px, 1.4vw, 22px)/1 var(--font-opera); letter-spacing: .26em; color: var(--offwhite);
  text-shadow: 0 1px 14px rgba(0, 0, 0, .95), 0 0 3px rgba(0, 0, 0, .9); transition: opacity .35s ease, transform .35s var(--ease-out); }
.ogirl-label::before { content: '← '; color: var(--red-light); }
.ogirl-label::after { content: ''; display: block; height: 2px; width: 0; margin-top: 10px; background: var(--red); transition: width .5s var(--ease-out) .05s; }
.ogirl-label.is-on { opacity: 1; transform: translate(0, -50%); }
.ogirl-label.is-on::after { width: 60%; }

/* UI: return, hint */
.oroom__ui { position: absolute; inset: 0; pointer-events: none; }
.oclose { position: absolute; left: var(--page-pad); top: clamp(16px, 3vw, 34px); pointer-events: auto; display: inline-flex; align-items: center; gap: 10px;
  border: 0; background: none; color: var(--offwhite); cursor: pointer; padding: 6px 0;
  font: 500 var(--fs-meta)/1 var(--font-grotesk); letter-spacing: .3em; text-shadow: 0 1px 10px rgba(0, 0, 0, .8); }
.oclose[hidden] { display: none; }
.oclose span:first-child { font-size: 22px; line-height: .6; transition: transform .4s var(--ease-out); }
.oclose:hover span:first-child, .oclose:focus-visible span:first-child { transform: rotate(90deg); color: var(--red-light); }
.oclose:focus-visible { outline: 1px solid rgba(241, 237, 228, .5); outline-offset: 6px; }
.oroom__hint { position: absolute; left: 50%; bottom: calc(var(--page-pad-y) * .5); margin: 0; transform: translateX(-50%); opacity: 0;
  font: 500 var(--fs-meta)/1 var(--font-grotesk); letter-spacing: .36em; transition: opacity .6s ease; text-shadow: 0 1px 10px #000; }
.oroom__hint.is-on { opacity: .85; }

/* lightbox */
.olight { position: absolute; inset: 0; z-index: 5; display: flex; align-items: center; justify-content: center; }
.olight[hidden] { display: none; }
.olight__shade { position: absolute; inset: 0; background: rgba(5, 5, 5, .45); opacity: 0; transition: opacity .6s ease; }
.olight.is-open .olight__shade { opacity: 1; }
.olight__fig { position: relative; margin: 0; display: flex; flex-direction: column; align-items: center; gap: 20px; }
.olight__art { position: relative; aspect-ratio: var(--ar, 3/4);
  /* the work big, centred (bigger than in front on the ring): at most 62vw wide and 72vh tall, the caption under it */
  width: min(62vw, calc(72vh * var(--arw, 3) / var(--arh, 4))); height: auto;
  border-radius: var(--radius-large); overflow: hidden; background: var(--grey-field); }
.olight__art img { width: 100%; height: 100%; object-fit: contain; background: var(--black); }
.olight__vid { display: block; width: 100%; height: 100%; object-fit: contain; background: var(--black); cursor: pointer; }
/* the sound toggle on a playing motion work: a small speaker, bottom right of the work (red slash when muted) */
.olight__snd { position: absolute; right: 14px; bottom: 14px; width: 40px; height: 40px; padding: 0; border: 0; border-radius: 50%; cursor: pointer;
  background: rgba(10, 10, 10, .6); box-shadow: 0 0 0 1px rgba(241, 237, 228, .4); transition: box-shadow .3s; }
.olight__snd:hover, .olight__snd:focus-visible { box-shadow: 0 0 0 1px var(--red); outline: none; }
.olight__snd span { position: absolute; inset: 0; background: center / 20px 20px no-repeat
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f1ede4' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 9h4l5-4v14l-5-4H4z' fill='%23f1ede4'/%3E%3Cpath d='M16.5 8.5a5 5 0 0 1 0 7M19 6a8.5 8.5 0 0 1 0 12'/%3E%3C/svg%3E"); }
.olight__snd.is-off span { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 9h4l5-4v14l-5-4H4z' fill='%23f1ede4' stroke='%23f1ede4'/%3E%3Cpath d='M16 9l6 6M22 9l-6 6' stroke='%23d40f16'/%3E%3C/svg%3E"); }
.owork__ph--big { font-size: 13px; }
.olight__cap { max-width: min(560px, 85vw); text-align: center; opacity: 0; transform: translateY(8px); transition: opacity .5s ease .3s, transform .5s var(--ease-out) .3s; }
.olight.is-open .olight__cap { opacity: 1; transform: none; }
.olight__t { margin: 0 0 8px; font: 400 clamp(20px, 2vw, 30px)/1 var(--font-opera); letter-spacing: .06em; }
.olight__m { margin: 0 0 10px; font: 500 var(--fs-meta)/1 var(--font-grotesk); letter-spacing: .26em; color: var(--grey); }
.olight__d { margin: 0; font: 400 var(--fs-body)/1.55 var(--font-grotesk); color: #d6d1c8; }
.olight__x { position: absolute; right: var(--page-pad); top: clamp(56px, 8vh, 90px); border: 0; background: none; color: var(--offwhite);
  font-size: 34px; line-height: 1; cursor: pointer; padding: 6px 10px; }
.olight__x:hover, .olight__x:focus-visible { color: var(--red-light); outline: none; }

body.in-opera .brand { text-shadow: 0 1px 12px rgba(0, 0, 0, .95); }

@media (max-width: 760px) {
  .owall__label { font-size: 13px; letter-spacing: .18em; }
  .olight__art { width: min(90vw, calc(58vh * var(--arw, 3) / var(--arh, 4))); }
}
@media (prefers-reduced-motion: reduce) {
  .ogirl__body { animation: none; }
  .oroom, .oroom__scene, .oframe, .owall__label, .olight__cap, .olight__shade { transition-duration: .01s !important; }
}