@font-face {
  font-family: 'VT323';
  src: url('font/vt323.woff2') format('woff2');
  font-display: block;
}

:root {
  --phosphor: rgb(255 153 26);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: #000;
  overflow: hidden;
  overscroll-behavior: none;
}

#buehne {
  position: fixed;
  inset: 0;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#roehre {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* Ohne WebGL2: das Textraster direkt zeigen und per Überblendung einfärben. */
#schleier { display: none; }
.ohne-gl #roehre { display: none; }
.ohne-gl #flach { position: absolute; image-rendering: pixelated; }
.ohne-gl #schleier {
  display: block;
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  background:
    repeating-linear-gradient(to bottom, rgb(0 0 0 / 0) 0 2px, rgb(0 0 0 / 0.28) 2px 3px),
    var(--phosphor);
}

.nur-vorlesen {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.ohne-js {
  position: fixed;
  inset: auto 0 2rem;
  text-align: center;
  font: 1.25rem/1.4 'VT323', monospace;
  color: var(--phosphor);
}
.ohne-js a { color: inherit; }