*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  background: rgb(var(--bg));
  color: rgb(var(--fg));
  font-family: var(--font);
  font-weight: 300;
  font-size: var(--fs-md);
  line-height: 1.35;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  -webkit-user-select: none;
}

/* The three.js canvas: one full-viewport layer behind all HTML. */
#scene {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 0;
  pointer-events: none;
}

#app { position: fixed; inset: 0; z-index: 1; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input { font: inherit; color: inherit; }
a { color: inherit; }

:focus-visible { outline: none; }

[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation-duration: 1ms !important; }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Narrow screens: a splash asks for a desktop and covers the app. */
#splash { display: none; }
@media (max-width: 1199px) {
  #splash {
    position: fixed; inset: 0; z-index: 1000; background: rgb(var(--bg));
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 1vh; padding: 0 24px; text-align: center; font-size: var(--fs-lg);
  }
  #splash p { margin: 0; }
  #splash .splash-sub { font-size: var(--fs-md); color: rgb(var(--fg) / .5); }
}