html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  color: #eee;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  overflow: hidden;
}

#view {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#view.grabbing {
  cursor: grabbing;
}

#hud-status {
  position: fixed;
  top: 8px;
  left: 8px;
  pointer-events: none;
  text-shadow: 0 1px 2px #000;
  line-height: 1.5;
  white-space: pre;
}

#landing {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

#landing[hidden] { display: none; }

.landing-card {
  background: rgba(0, 0, 0, 0.55);
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  padding: 32px 48px;
  text-align: center;
  min-width: 320px;
  transition: border-color 0.12s, background 0.12s;
}

body.drag-over .landing-card {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.landing-title {
  font-size: 18px;
  letter-spacing: 0.08em;
}

.landing-sub {
  margin-top: 6px;
  opacity: 0.7;
}

.landing-sub code {
  background: rgba(255, 255, 255, 0.1);
  padding: 1px 4px;
  border-radius: 2px;
}

.landing-progress {
  margin-top: 14px;
  opacity: 0.85;
  white-space: pre;
}

.landing-progress[hidden] { display: none; }

#error {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  padding: 24px;
  text-align: center;
  font-size: 14px;
  line-height: 1.6;
}

#error[hidden] { display: none; }
#error a { color: #6cf; }

/* When the gallery is up, dim the live render behind the card so it reads. */
#landing {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
}
#landing[hidden] { display: none; }

/* The landing card is interactive (gallery clicks); the backdrop is not,
   so drag-drop still falls through to the window listener. */
.landing-card { pointer-events: auto; }

/* Gallery grid of scene cards. */
.gallery {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  max-width: 460px;
}

.gallery:empty { display: none; }

.gallery-card {
  appearance: none;
  font: inherit;
  color: #eee;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 18px 10px;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.12s, background 0.12s, transform 0.06s;
}

.gallery-card:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.gallery-card:active { transform: translateY(1px); }

.gallery-drop {
  border-style: dashed;
  opacity: 0.75;
}

.gallery-name { display: block; }

.gallery-size {
  display: block;
  margin-top: 5px;
  font-size: 10px;
  opacity: 0.65;
}

/* "← gallery" button, top-right. */
#back-to-gallery {
  position: fixed;
  top: 8px;
  right: 8px;
  appearance: none;
  font: inherit;
  color: #eee;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
}

#back-to-gallery:hover { border-color: #fff; }
#back-to-gallery[hidden] { display: none; }

/* Settings panel (createTweaks), bottom-right. */
#tweaks {
  position: fixed;
  right: 8px;
  bottom: 8px;
  min-width: 200px;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 8px 10px;
  text-shadow: 0 1px 2px #000;
}

.tweak-section {
  opacity: 0.6;
  margin: 6px 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 10px;
}
.tweak-section:first-child { margin-top: 0; }

.tweak-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 3px 0;
}

.tweak-label {
  flex: 0 0 38px;
  opacity: 0.85;
}

.tweak-row input[type="range"] { flex: 1; min-width: 80px; }
.tweak-row select { flex: 1; }

.tweak-row select,
.tweak-row input[type="number"] {
  font: inherit;
  color: #eee;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 2px 4px;
}

.tweak-val {
  flex: 0 0 28px;
  text-align: right;
  opacity: 0.85;
}