:root {
  --interactive-surface: #f7f7f5;
}

.interactive-page {
  padding-top: var(--nav-h);
  min-height: 100vh;
}

.interactive-center {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 1.4rem 0 3rem;
}

.interactive-heading {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto 1rem;
  padding: 0 2rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
}

.interactive-back {
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.4s ease;
}

.interactive-back:hover {
  color: var(--text);
}

.interactive-title {
  font-family: 'Oxygen', sans-serif;
  font-weight: 300;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.interactive-label {
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.canvas-wrap {
  position: relative;
  width: 100%;
  height: min(76vh, 900px);
  min-height: 480px;
  background: var(--interactive-surface);
  overflow: hidden;
  touch-action: none;
}

#polyptych {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: default;
}

.loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.loading.is-hidden {
  opacity: 0;
}

.controls {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
  display: flex;
  align-items: center;
  gap: 1.4rem;
  padding-top: 0.9rem;
}

.controls button,
.grid-control {
  appearance: none;
  border: 0;
  background: none;
  color: inherit;
  font-family: 'Quicksand', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0;
  cursor: pointer;
}

.controls button:hover,
.grid-control:hover {
  color: var(--muted);
}

.grid-control {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.grid-control input {
  margin: 0;
  width: 13px;
  height: 13px;
  accent-color: var(--text);
}

.instruction {
  width: 100%;
  max-width: 1300px;
  margin: 0.55rem auto 0;
  padding-left: 2rem;
  padding-right: 2rem;
  font-size: 0.72rem;
  color: var(--muted);
}

.interactive-footer {
  padding-top: 0;
}

@media (max-width: 640px) {
  .interactive-heading,
  .controls,
  .instruction {
    padding-left: 1.2rem;
    padding-right: 1.2rem;
  }

  .interactive-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.55rem;
  }

  .canvas-wrap {
    min-height: 430px;
    height: 68vh;
  }
}