.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rail-w);
  height: 100%;
}

/* Stage */

.stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background-color: var(--ground);
  background-image: radial-gradient(var(--ground-dot) 1px, transparent 1.4px);
  background-size: 18px 18px;
}

.stage-bar {
  position: absolute;
  z-index: 2;
  top: calc(20px + env(safe-area-inset-top, 0px));
  left: max(20px, env(safe-area-inset-left, 0px));
  display: flex;
  gap: 8px;
}

.stage-viewport {
  position: absolute;
  inset: 96px 56px 56px max(56px, env(safe-area-inset-left, 0px));
}

.frame {
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 0 0 1px var(--line);
}

.frame canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.frame-reference {
  position: absolute;
  inset: 0;
  margin: auto;
  max-width: 64%;
  max-height: 72%;
  border-radius: 10px;
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
  transition: opacity 0.35s var(--ease), transform 0.45s var(--ease);
}

.frame-reference.is-visible {
  opacity: 1;
  transform: none;
}

.unsupported {
  max-width: 34ch;
  margin: 18vh auto 0;
  color: var(--ink-2);
  font-size: var(--text-l);
  text-align: center;
  text-wrap: balance;
}

.drop-hint {
  position: absolute;
  z-index: 3;
  inset: 16px;
  display: grid;
  place-items: center;
  border: 2px dashed var(--line-strong);
  border-radius: var(--radius-l);
  background: rgba(17, 17, 19, 0.72);
  color: var(--ink);
  font-size: var(--text-xl);
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
}

.drop-hint.is-visible {
  opacity: 1;
}

.toast {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--pop);
  box-shadow: 0 0 0 1px var(--line), 0 16px 40px var(--shadow);
  font-size: var(--text-m);
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity 0.25s var(--ease), transform 0.35s var(--ease);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Control rail */

.panel {
  display: flex;
  flex-direction: column;
  gap: 30px;
  min-height: 0;
  overflow-y: auto;
  padding: 0 max(24px, env(safe-area-inset-right, 0px)) calc(32px + env(safe-area-inset-bottom, 0px)) 24px;
  background: var(--rail);
  border-left: 1px solid var(--line);
  scrollbar-width: thin;
}

.panel-actions {
  position: sticky;
  z-index: 2;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  margin: 0 -24px;
  padding: 20px 24px 18px;
  background: var(--rail);
  border-bottom: 1px solid var(--line);
}

.section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink-3);
  font-size: var(--text-m);
  font-weight: 500;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}