.scene-page-hero { padding-block: 42px 26px; }
.scene-page-hero h1 { font-size: clamp(36px, 4.5vw, 58px); margin-block: 12px; }
.scene-page-hero .page-intro { margin-bottom: 0; }
.showcase-section { padding-bottom: 48px; }
.scene-preview-inline { padding: 20px; border: 1px solid var(--line); background: var(--paper); scroll-margin-top: 110px; }
/* A single quiet navigation rail, including on narrow screens. */
.scene-demo-selector { display: flex; gap: 28px; overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; scrollbar-color: var(--line) transparent; scroll-padding-inline: 4px; padding: 3px 4px 0; margin: -3px -4px 24px; border-bottom: 1px solid var(--line); }
.scene-demo-selector button { flex: 0 0 auto; min-height: 48px; border: 0; border-bottom: 2px solid transparent; padding: 10px 0 14px; background: transparent; color: var(--muted); font: 16px/1.3 var(--serif); white-space: nowrap; cursor: pointer; }
.scene-demo-selector button:hover { color: var(--ink); }
.scene-demo-selector button[aria-pressed="true"] { border-bottom-color: var(--ink); color: var(--ink); }
.scene-demo-selector button:focus-visible { outline: 2px solid var(--ink); outline-offset: -2px; }
.scene-preview-toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px 20px; }
.scene-preview-toolbar h2 { margin: 0; font: 28px/1.2 var(--serif); letter-spacing: -.5px; }
.scene-preview-actions { display: flex; align-items: center; gap: 18px; }
.scene-preview-actions button { min-height: 44px; font: 14px/1.3 var(--serif); }
.scene-preview-modes { margin-block: 12px 16px; }
.scene-mode-buttons { display: inline-flex; border: 1px solid var(--line); }
.scene-mode-buttons button { min-height: 40px; border: 0; padding: 8px 16px; background: transparent; font: 14px/1.3 var(--serif); }
.scene-mode-buttons button + button { border-left: 1px solid var(--line); }
.scene-mode-buttons button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.scene-mode-buttons button[hidden] { display: none; }
.scene-renderer-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; }
.scene-renderer-controls label { font: 14px/1.4 var(--serif); }
.scene-renderer-controls select { max-width: 100%; min-height: 44px; padding: 8px 32px 8px 12px; border: 1px solid var(--line); border-radius: 0; background: var(--paper); color: var(--ink); font: 15px/1.4 var(--serif); }
.scene-renderer-controls select:focus-visible, .scene-member-viewer a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.scene-renderer-note { max-width: 90ch; margin: 8px 0 16px; color: var(--muted); font: 13px/1.6 var(--serif); }
.scene-member-viewer { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 0; font: 13px/1.6 var(--serif); }
.scene-member-viewer span { color: var(--muted); }
/* Size the actual player by its width, rather than squeezing it into a vh strip. */
.scene-preview-stage { position: relative; width: 100%; height: auto; aspect-ratio: 16 / 10; min-height: 0; border: 1px solid var(--line); background: var(--light); }
.scene-preview-stage[data-mode="task"] { aspect-ratio: 4 / 3; }
.scene-preview-host, .scene-preview-mount { width: 100%; height: 100%; min-width: 0; min-height: 0; }
.scene-preview-feedback { position: absolute; inset: 0; z-index: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; padding: 24px; text-align: center; background: var(--light); }
.scene-preview-feedback p { margin: 0; max-width: 460px; font: 16px/1.6 var(--serif); }
.scene-preview-feedback[hidden], .scene-preview-feedback button[hidden] { display: none; }
.scene-preview-info { margin-top: 14px; color: var(--muted); font: 13px/1.6 var(--serif); }
.scene-preview-info summary { cursor: pointer; width: fit-content; }
.scene-preview-info p { max-width: 80ch; margin-bottom: 0; }
.scene-fullscreen-open { overflow: hidden; }
.scene-preview-inline:fullscreen, .scene-preview-inline.is-expanded { display: flex; flex-direction: column; width: 100%; max-width: none; height: 100dvh; padding: 16px; margin: 0; border: 0; background: var(--paper); overflow: auto; box-sizing: border-box; }
.scene-preview-inline.is-expanded { position: fixed; inset: 0; z-index: 10000; }
:is(.scene-preview-inline:fullscreen, .scene-preview-inline.is-expanded) .scene-preview-stage { flex: 1; min-height: 0; aspect-ratio: auto; }
:is(.scene-preview-inline:fullscreen, .scene-preview-inline.is-expanded) .scene-demo-selector { margin-bottom: 10px; }
:is(.scene-preview-inline:fullscreen, .scene-preview-inline.is-expanded) .scene-preview-info { display: none; }
@media (max-width: 700px) {
  .scene-demo-selector { gap: 24px; }
  .scene-preview-inline { padding: 12px; }
  .scene-preview-toolbar h2 { font-size: 23px; }
  .scene-preview-actions { gap: 16px; }
  .scene-preview-stage { aspect-ratio: 4 / 3; }
  .scene-preview-stage[data-mode="task"] { aspect-ratio: 4 / 5; }
}

.scene-build-variant{display:flex;align-items:center;gap:.5rem;font:inherit;font-size:.8rem;color:var(--muted,#666)}
.scene-build-variant[hidden]{display:none}
.scene-build-variant select{font:inherit;color:inherit;background:transparent;border:1px solid #d8d8d0;border-radius:.4rem;padding:.35rem .55rem;max-width:100%}
.scene-preview-modes{flex-wrap:wrap;gap:.65rem}