/* Flow-based overlays shared by Life and Forest Fire. */
.simulation-page {
  --hud-gap: 24px;
  --hud-top: 88px;
  --drawer-width: 336px;
  line-height: 1.5;
}
.simulation-page header {
  background: var(--theme-bg);
  font-size: 13px;
}
.simulation-page #grid { pointer-events: auto; }
.simulation-page .simulation-info {
  position: fixed;
  z-index: 3;
  top: var(--hud-top);
  left: var(--hud-gap);
  max-width: calc(100vw - var(--drawer-width) - 3 * var(--hud-gap));
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  background: var(--theme-deep);
  border: 1px solid var(--theme-border);
  border-radius: 12px;
  pointer-events: none;
}
.simulation-page .intro {
  position: static;
  max-width: none;
  margin: 0;
  flex-wrap: wrap;
  gap: 14px;
  text-shadow: none;
}
.simulation-page .intro h1 {
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.2;
}
.simulation-page .intro .eyebrow {
  color: var(--theme-muted);
  font-size: 11px;
  letter-spacing: 1.2px;
  margin-bottom: 10px;
}
.simulation-page .intro p:last-child {
  font-size: 14px;
  margin-top: 10px;
}
.simulation-page .intro-tag {
  font-size: 11px;
  color: var(--theme-text);
  background: var(--theme-control);
}
.simulation-page .world-heading {
  position: static;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 0;
}
.simulation-page .world-heading .legend {
  font-size: 12px;
  color: var(--theme-text);
  gap: 14px;
  width: auto;
  padding: 0;
  background: none;
  border: none;
}
.simulation-page .legend i { width: 9px; height: 9px; }
.simulation-page .world-heading .status {
  font-size: 11px;
  margin: 0;
  padding: 5px 9px;
  color: var(--theme-text);
}
.simulation-page #canvas-hint {
  position: static;
  font-size: 12px;
  line-height: 1.5;
  padding: 0;
  border: none;
  background: none;
  color: var(--theme-muted);
}
.simulation-page .control-drawer {
  top: var(--hud-top);
  right: var(--hud-gap);
  width: var(--drawer-width);
  max-height: calc(100svh - var(--hud-top) - var(--simulation-bottom-height, 190px) - 2 * var(--hud-gap));
  overflow-y: auto;
  background: var(--theme-panel);
  border-color: var(--theme-border);
  scrollbar-width: thin;
}
.simulation-page .control-drawer:not([open]) { width: auto; }
.simulation-page details > summary {
  min-height: 48px;
  padding: 14px 20px;
  font-size: 14px;
  color: var(--theme-text);
}
.simulation-page .control-drawer .toolbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  padding: 20px;
}
.simulation-page .control-drawer .preset-label { grid-column: 1 / -1; }
.simulation-page .control-drawer .toolbar label {
  color: var(--theme-text);
  font-size: 13px;
  line-height: 1.5;
  gap: 8px;
  width: auto;
  min-width: 0;
}
.simulation-page .control-drawer .slider-label {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  column-gap: 8px;
}
.simulation-page .control-drawer .toolbar output {
  position: static;
  font-size: 12px;
  line-height: 1.625;
  color: var(--theme-accent);
  white-space: nowrap;
}
.simulation-page .control-drawer .slider-label input {
  grid-column: 1 / -1;
  height: 36px;
  min-width: 0;
}
.simulation-page .control-drawer .toolbar select {
  font-size: 14px;
  min-height: 44px;
  color: var(--theme-text);
}
.simulation-page .world-tools { gap: 18px; padding: 0 20px 20px; }
.simulation-page .brushes { flex-wrap: wrap; }
.simulation-page .brushes button {
  font-size: 13px;
  min-height: 44px;
  color: var(--theme-text);
}
.simulation-page .view-options {
  flex-wrap: wrap;
  font-size: 13px;
  gap: 12px 18px;
  color: var(--theme-text);
}
.simulation-page .view-options input { width: 16px; height: 16px; }
.simulation-page .simulation-bottom {
  position: fixed;
  z-index: 5;
  left: var(--hud-gap);
  right: var(--hud-gap);
  bottom: var(--hud-gap);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 16px 24px;
  pointer-events: none;
}
.simulation-page .stats,
.simulation-page .floating-play,
.simulation-page .explanation {
  position: static;
  width: auto;
  max-width: none;
  margin: 0;
  background: var(--theme-deep);
  border-color: var(--theme-border);
}
.simulation-page .stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  justify-self: start;
  gap: 20px;
  padding: 16px 20px;
}
.simulation-page .stats > div { min-width: 0; }
.simulation-page .stats > div > span {
  display: block;
  font-size: 11px;
  letter-spacing: .4px;
  color: var(--theme-muted);
}
.simulation-page .stats strong {
  font-size: 22px;
  margin-top: 6px;
  overflow-wrap: anywhere;
  color: var(--theme-text);
}
.simulation-page .stats strong span { font-size: 12px; color: var(--theme-muted); }
.simulation-page .floating-play { pointer-events: auto; }
.simulation-page .floating-play button { min-height: 44px; }
.simulation-page .floating-play .primary { font-size: 14px; }
.simulation-page .explanation {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding: 16px 20px;
  min-height: 0;
}
.simulation-page .explanation .rules-title,
.simulation-page .explanation a {
  display: inline;
  color: var(--theme-accent);
  font-size: 12px;
}
.simulation-page .explanation p {
  flex: 1 1 400px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--theme-text);
}
/* Translucent themed glass; opaque panels remain the fallback without blur. */
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .simulation-page header,
  .simulation-page .simulation-info,
  .simulation-page .control-drawer,
  .simulation-page .stats,
  .simulation-page .floating-play,
  .simulation-page .explanation {
    background:
      linear-gradient(135deg, rgb(255 255 255 / 9%), transparent 48%),
      color-mix(in srgb, var(--theme-deep) 70%, transparent);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    backdrop-filter: blur(20px) saturate(140%);
    border-color: color-mix(in srgb, var(--theme-accent) 32%, transparent);
    box-shadow:
      inset 0 1px 0 rgb(255 255 255 / 16%),
      inset 0 -1px 0 rgb(0 0 0 / 12%),
      0 8px 28px rgb(0 0 0 / 18%);
  }
  .simulation-page header { box-shadow: inset 0 -1px 0 rgb(255 255 255 / 8%); }
  .simulation-page .intro .eyebrow,
  .simulation-page .intro p:last-child,
  .simulation-page #canvas-hint,
  .simulation-page .stats > div > span,
  .simulation-page .stats strong span {
    color: color-mix(in srgb, var(--theme-muted) 75%, var(--theme-text));
  }
  .simulation-page .control-drawer select,
  .simulation-page .brushes button,
  .simulation-page .floating-play button:not(.primary),
  .simulation-page .intro-tag {
    background: color-mix(in srgb, var(--theme-control) 75%, transparent);
    border-color: color-mix(in srgb, var(--theme-accent) 26%, transparent);
    box-shadow: inset 0 1px 0 rgb(255 255 255 / 6%);
  }
  .simulation-page .brushes button.selected {
    background: color-mix(in srgb, var(--theme-active) 85%, transparent);
    border-color: color-mix(in srgb, var(--theme-accent) 65%, transparent);
  }
  .simulation-page .brushes button:hover,
  .simulation-page .floating-play button:not(.primary):hover {
    background: color-mix(in srgb, var(--theme-active) 80%, transparent);
    border-color: var(--theme-accent);
  }
}
@media (max-width: 1000px) {
  .simulation-page .stats { gap: 16px; }
  .simulation-page .stats strong { font-size: 20px; }
  .simulation-page .simulation-bottom { gap: 14px; }
}
@media (max-width: 760px) {
  .simulation-page { --hud-gap: 16px; --hud-top: 76px; }
  .simulation-page .simulation-info {
    right: var(--hud-gap);
    max-width: none;
    padding: 16px;
    gap: 12px;
  }
  .simulation-page .intro .eyebrow { font-size: 10px; letter-spacing: .8px; }
  .simulation-page .intro p:last-child,
  .simulation-page .intro-tag { display: none; }
  .simulation-page .world-heading .legend { gap: 12px; }
  .simulation-page .control-drawer {
    top: calc(var(--hud-top) + var(--simulation-info-height, 190px) + 12px);
    width: min(336px, calc(100vw - 2 * var(--hud-gap)));
    max-height: calc(100svh - var(--hud-top) - var(--simulation-info-height, 190px) - var(--simulation-bottom-height, 240px) - 2 * var(--hud-gap) - 12px);
  }
  .simulation-page .simulation-bottom { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .simulation-page .stats { justify-self: stretch; padding: 14px; gap: 12px; }
  .simulation-page .stats > div > span { font-size: 10px; letter-spacing: 0; }
  .simulation-page .stats strong { font-size: 18px; }
  .simulation-page .floating-play .play-controls { width: 100%; }
  .simulation-page .explanation { padding: 14px 16px; }
  .simulation-page .explanation .rules-title,
  .simulation-page .explanation a { display: none; }
  .simulation-page .explanation p { font-size: 13px; line-height: 1.6; }
}
@media (max-width: 380px) {
  .simulation-page .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .simulation-page .stats > div > span { font-size: 11px; }
}
/* Short screens scroll the overlays as one column, keeping every control reachable. */
@media (max-height: 700px) {
  .simulation-page main {
    position: fixed;
    z-index: 3;
    inset: var(--hud-top) var(--hud-gap) var(--hud-gap);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    pointer-events: none;
  }
  .simulation-page .simulation-info,
  .simulation-page .control-drawer,
  .simulation-page .simulation-bottom {
    position: static;
    max-width: none;
    max-height: none;
    width: auto;
    flex-shrink: 0;
  }
  .simulation-page .control-drawer { pointer-events: auto; }
  .simulation-page .control-drawer:not([open]) { align-self: flex-end; }
  .simulation-page .simulation-bottom { margin-top: 80px; }
  .simulation-page .simulation-info { pointer-events: auto; }
}