/* Primes: full-screen chart, chrome from the shared --lab-* tokens. */
html, body { overflow: hidden; }

#primes-canvas {
  position: fixed; inset: 0; display: block;
  width: 100vw; height: 100vh; touch-action: none; cursor: crosshair;
}

#primes-bar {
  position: fixed; z-index: 20; top: 8px; left: 8px;
  max-width: calc(100vw - 16px); box-sizing: border-box;
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px;
  font: var(--lab-font-size)/1.3 var(--lab-font);
  user-select: none;
}
#primes-bar h1 { margin: 0 4px 0 0; color: var(--lab-ink); font-size: 14px; font-weight: 800; }
#primes-bar label { display: inline-flex; align-items: center; gap: 6px; }
.primes-seg { display: inline-flex; }
.primes-seg .lab-button { padding: 0 10px; border-radius: 0; }
.primes-seg .lab-button:first-child { border-radius: var(--lab-radius-sm) 0 0 var(--lab-radius-sm); }
.primes-seg .lab-button:last-child { border-radius: 0 var(--lab-radius-sm) var(--lab-radius-sm) 0; }
.primes-seg .lab-button[aria-pressed=true] { background: var(--lab-accent); color: var(--lab-accent-ink); }

#primes-readout {
  position: fixed; z-index: 20; left: 50%; bottom: calc(10px + env(safe-area-inset-bottom));
  transform: translateX(-50%); width: max-content; max-width: calc(100vw - 150px); box-sizing: border-box;
  color: var(--lab-muted); font: 14px/1.4 var(--lab-mono); text-align: center;
  overflow-wrap: anywhere;
}
#primes-readout b { color: var(--lab-magenta); }
.primes-terms { color: var(--lab-dim); font-family: var(--lab-font); font-size: 12px; margin-left: 6px; }

#primes-hint { bottom: calc(56px + env(safe-area-inset-bottom)); }

@media (max-width: 600px) {
  #primes-bar h1 { width: 100%; }
  #primes-readout { max-width: calc(100vw - 16px); bottom: calc(40px + env(safe-area-inset-bottom)); font-size: 12px; }
  #primes-hint { display: none; }
}