/* Per-chapter scenes (task-anim-crt-boot onwards).
 * All motion dies under prefers-reduced-motion; scenes also receive a
 * reducedMotion flag in JS to paint their static frame.
 */

/* A filled stage drops its scaffold placeholder chrome. */
.scene-stage:not(:empty) {
  border: none;
  display: block;
  min-height: 0;
  color: inherit;
}

.scene-stage:not(:empty)::after {
  content: none;
}

/* Chapter 1 — CRT boot ---------------------------------------------------- */

.crt {
  width: min(30rem, 92%);
  margin-inline: auto;
}

.crt-screen {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 40%, #0b2440 0%, #051224 70%, #020a14 100%);
  border-radius: 7% / 9%;
  box-shadow: inset 0 0 5rem rgba(70, 240, 138, 0.12), 0 0 0 2px var(--line);
  transform: scaleY(0.006);
  transform-origin: center;
}

.crt.is-on .crt-screen {
  animation: crt-on 900ms var(--ease-out) forwards;
}

@keyframes crt-on {
  0%   { transform: scaleY(0.006); filter: brightness(7); }
  40%  { transform: scaleY(1.06);  filter: brightness(3); }
  55%  { transform: scaleY(0.99);  filter: brightness(1.4); }
  72%  { transform: scaleY(1);     filter: brightness(0.7); }
  100% { transform: scaleY(1);     filter: brightness(1); }
}

.crt-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.28) 3px,
    rgba(0, 0, 0, 0.28) 4px
  );
  pointer-events: none;
}

.crt-glass {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(204, 214, 246, 0.09) 0%, rgba(204, 214, 246, 0) 35%);
  border-radius: inherit;
  pointer-events: none;
}

.crt-boot {
  position: absolute;
  inset: 8% 9%;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  line-height: 1.7;
  color: var(--accent);
  text-shadow: 0 0 6px var(--glow);
  white-space: pre-wrap;
  margin: 0;
}

.crt-line::after {
  content: "\2588"; /* block cursor */
  margin-left: 2px;
  visibility: hidden;
}

.crt-line.is-typing::after {
  visibility: visible;
  animation: crt-blink 1s steps(1) infinite;
}

@keyframes crt-blink {
  50% { opacity: 0; }
}

.crt-chin {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: var(--space-2) var(--space-4);
  background: #13223a;
  border: 1px solid var(--line);
  border-top: none;
  border-radius: 0 0 6px 6px;
}

.crt-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #233554;
  transition: background var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}

.crt.is-on .crt-led {
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
}

.crt-stand {
  width: 38%;
  height: var(--space-4);
  margin: 0 auto;
  background: linear-gradient(#112240, #0a192f);
  border: 1px solid var(--line);
  border-top: none;
  border-radius: 0 0 10px 10px;
}

@media (prefers-reduced-motion: reduce) {
  .crt-screen {
    transform: none;
    animation: none !important;
  }

  .crt-line.is-typing::after {
    animation: none;
  }
}