html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: #fafaf7; font-family: var(--kohaku-font-family, system-ui, sans-serif); }
#app { position: absolute; inset: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }
#startup { margin: 24px; font-size: 18px; line-height: 1.5; }
canvas { touch-action: none; }