:root {
  --bg: #07080a;
  --gold: #d8b878;
  --ink: #efe9dc;
  --muted: rgb(239 233 220 / 0.55);
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Inter', system-ui, sans-serif;
  --w: clamp(150px, 19vw, 270px);
  --h: calc(var(--w) * 1.35);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

/* Light from above, and its pool on the floor. */
.spot {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 50% 40%, rgb(216 184 120 / 0.14), transparent 70%),
    radial-gradient(ellipse 45% 10% at 50% 74%, rgb(216 184 120 / 0.1), transparent 70%);
  pointer-events: none;
}

.top {
  position: fixed;
  top: 28px;
  right: 0;
  left: 0;
  z-index: 5;
  text-align: center;
  pointer-events: none;
}

.eyebrow {
  margin: 0;
  color: var(--gold);
  font: 500 0.68rem var(--sans);
  letter-spacing: 0.4em;
  text-transform: uppercase;
}

h1 {
  margin: 0.15em 0 0;
  font: 300 clamp(2rem, 4.4vw, 3.6rem) / 1 var(--serif);
  letter-spacing: 0.02em;
}

/* The ring */

.scene {
  position: fixed;
  inset: 0;
  cursor: grab;
  perspective: 1400px;
  perspective-origin: 50% 38%;
  touch-action: none;
}

.scene.dragging {
  cursor: grabbing;
}

.ring {
  position: absolute;
  top: 46%;
  left: 50%;
  width: 0;
  height: 0;
  transform: translateZ(calc(-1 * var(--radius))) rotateY(var(--angle));
  transform-style: preserve-3d;
}

.panel {
  position: absolute;
  top: calc(var(--h) / -2);
  left: calc(var(--w) / -2);
  width: var(--w);
  height: var(--h);
  margin: 0;
  backface-visibility: hidden;
  transform: rotateY(var(--a)) translateZ(var(--radius));
}

.panel img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--avg);
  filter: brightness(var(--lit, 1)) sepia(0.12);
  -webkit-box-reflect: below 16px linear-gradient(transparent 62%, rgb(0 0 0 / 0.3));
  pointer-events: none;
}

.panel::after {
  content: '';
  position: absolute;
  inset: -6px;
  border: 1px solid rgb(216 184 120 / calc(var(--lit, 1) * 0.6));
  pointer-events: none;
}

/* The plaque under the front picture */

.plaque {
  position: fixed;
  right: 0;
  bottom: 92px;
  left: 0;
  text-align: center;
  pointer-events: none;
}

.numeral {
  margin: 0;
  color: var(--gold);
  font: italic 300 1.15rem var(--serif);
  letter-spacing: 0.12em;
}

.plaque h2,
.lb-text h2 {
  margin: 0.1em 0 0.2em;
  font: 300 clamp(1.6rem, 3vw, 2.4rem) / 1.05 var(--serif);
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.swap {
  animation: swap 0.7s ease;
}

@keyframes swap {
  from {
    opacity: 0;
    translate: 0 6px;
  }
}

.controls {
  position: fixed;
  right: 0;
  bottom: 28px;
  left: 0;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.controls button {
  display: grid;
  place-items: center;
  min-width: 44px;
  height: 44px;
  padding: 0 16px;
  border: 1px solid rgb(216 184 120 / 0.45);
  border-radius: 999px;
  background: rgb(7 8 10 / 0.6);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.2s;
}

.controls button:hover {
  background: rgb(216 184 120 / 0.14);
}

.controls button[aria-pressed='true'] {
  border-color: var(--gold);
  color: var(--gold);
}

.controls svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hint {
  position: fixed;
  right: 24px;
  bottom: 38px;
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
}

/* A closer look */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 340px);
  align-items: center;
  gap: 48px;
  padding: clamp(20px, 5vw, 64px);
  background: rgb(7 8 10 / 0.9);
  backdrop-filter: blur(18px);
  animation: open 0.5s ease;
}

.lightbox[hidden] {
  display: none;
}

@keyframes open {
  from {
    opacity: 0;
  }
}

.lightbox img {
  justify-self: end;
  max-width: 100%;
  max-height: 86vh;
  object-fit: contain;
  box-shadow: 0 40px 100px -30px rgb(0 0 0);
  animation: rise 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes rise {
  from {
    opacity: 0;
    scale: 0.94;
  }
}

.lb-text button {
  margin-top: 28px;
  padding: 10px 20px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  background: none;
  color: var(--gold);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.notice {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .hint {
    display: none;
  }

  .lightbox {
    grid-template-columns: 1fr;
    align-content: center;
  }

  .lightbox img {
    justify-self: center;
    max-height: 60vh;
  }
}