* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.42;
  padding: 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 8px auto 16px;
  max-width: 1200px;
}

.brand-left { display: inline-flex; align-items: center; gap: 10px; }

main {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

#controls, #timelineSection, #playbackControls {
  border-radius: var(--radius);
  padding: 16px;
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-soft);
}

/* Keep row layout crisp */
#controls .row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* Visual layers: canvases behind, UI above */
.pepe-snow-canvas { position: fixed; inset:0; pointer-events:none; z-index:0; opacity: 0.85; }
.bg-viz { position: fixed; inset:0; pointer-events: none; z-index: 1; opacity: 0.55; }
header, main, #nodePopup { position: relative; z-index: 2; }

/* Remove play/pause-dependent styling for consistency */
/* Previously body.playing added different backgrounds; now panels stay readable always */

@media (max-width: 760px) {
  body { padding: 12px; }
  header { margin: 4px auto 10px; }
  main { gap: 12px; }
  #controls .row { flex-direction: column; align-items: stretch; gap: 12px; }
}