/* =========================================================
   El mundo: pantallas en horizontal
   Contenedor con scroll horizontal y snap, capas de parallax,
   mandos ◄ / GO ►, rótulo de STAGE y filtro CRT.
   Sin JS las pantallas se apilan en vertical.
   ========================================================= */

.world {
  position: fixed;
  inset: 0;
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  overscroll-behavior: contain;
  scrollbar-width: none;
  outline: none;
}
.world::-webkit-scrollbar { display: none; }
.world.is-moving { scroll-snap-type: none; }

.stage {
  position: relative;
  flex: 0 0 100vw;
  width: 100vw;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  isolation: isolate;
  scrollbar-width: thin;
  scrollbar-color: var(--gold) transparent;
}

/* Fondo lejano: se mueve más despacio (parallax) */
.stage__far {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -30%;
  width: 160%;
  z-index: -1;
  pointer-events: none;
  will-change: transform;
}
/* Escenarios de assets/pixel; se pueden apilar varias capas */
.scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.stage__body {
  position: relative;
  min-height: 100%;
  padding: calc(var(--hud-h) + clamp(28px, 5vh, 56px)) var(--gutter) calc(var(--controls-h) + clamp(24px, 4vh, 40px));
  max-width: 1440px;
  margin: 0 auto;
}

/* Sin JS: las pantallas se apilan en vertical */
html:not(.js) body { overflow: auto; height: auto; }
html:not(.js) .world { position: static; display: block; overflow: visible; }
html:not(.js) .stage { width: 100%; height: auto; min-height: 100vh; overflow: hidden; }
html:not(.js) .stage__far { left: 0; width: 100%; }
html:not(.js) .controls { display: none; }
html:not(.js) .hud { position: absolute; height: auto; min-height: var(--hud-h); flex-wrap: wrap; display: flex; padding-block: 10px; }

/* ---------------------------------------------------------
   Mandos y rótulos
   --------------------------------------------------------- */

.controls {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--controls-h);
  padding: 0 var(--gutter) 12px;
  pointer-events: none;
}
.controls__hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 10px;
  background: var(--ink);
  border: 2px solid rgb(255 246 224 / .25);
  color: var(--text-muted);
  font: 700 var(--px-2xs)/1 var(--f-pixel);
  text-shadow: 2px 2px 0 var(--ink);
}
/* Centro de la barra: botón de música y pista de controles */
.controls__mid {
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
}
.sound-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 10px;
  border: 2px solid rgb(255 246 224 / .25);
  background: var(--ink);
  color: var(--text-muted);
  font: 700 var(--px-2xs)/1 var(--f-pixel);
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--dur-hover) steps(2), border-color var(--dur-hover) steps(2), transform var(--dur-press) steps(2);
}
.sound-btn svg { width: 18px; height: 16px; }
.sound-btn:active { transform: translateY(2px); }
.sound-btn__state { color: var(--lime); }
.sound-btn__off { display: none; }
.sound-btn[aria-pressed="false"] .sound-btn__on { display: none; }
.sound-btn[aria-pressed="false"] .sound-btn__off { display: block; }
.sound-btn[aria-pressed="false"] .sound-btn__state { color: var(--red-bright); }
@media (hover: hover) and (pointer: fine) {
  .sound-btn:hover { color: var(--text); border-color: var(--gold); }
}

.controls__keys { display: flex; gap: 4px; color: var(--gold); }
.controls__keys svg { width: 9px; height: 9px; }
.controls__keys svg:first-child { transform: scaleX(-1); }
.ctrl {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  min-width: 48px;
  padding: 0 14px;
  border: 3px solid var(--ink);
  background: var(--gold);
  color: var(--ink);
  font: 700 var(--px-xs)/1 var(--f-pixel);
  box-shadow: 0 4px 0 var(--gold-deep), 0 4px 0 3px var(--ink);
  cursor: pointer;
  pointer-events: auto;
  transition: transform var(--dur-press) var(--ease), box-shadow var(--dur-press) var(--ease), opacity 200ms ease, visibility 0s;
}
.ctrl svg { width: 14px; height: 14px; }
.ctrl--prev svg { transform: scaleX(-1); }
.ctrl:active { transform: translateY(4px); box-shadow: 0 0 0 var(--gold-deep), 0 0 0 3px var(--ink); }
.ctrl[hidden] { display: flex; opacity: 0; visibility: hidden; transition: opacity 200ms ease, visibility 0s linear 200ms; }
.ctrl--next .ctrl__go { animation: blink 1.2s steps(1) infinite; }
@media (hover: hover) and (pointer: fine) {
  .ctrl:hover { filter: brightness(1.12); }
}

.stage-card {
  position: fixed;
  top: 50%;
  left: 0;
  right: 0;
  z-index: 120;
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: 26px 0;
  transform: translateY(-50%);
  background: linear-gradient(90deg, transparent, rgb(7 5 15 / .85) 20%, rgb(7 5 15 / .85) 80%, transparent);
  pointer-events: none;
  visibility: hidden;
}
.stage-card__num {
  color: var(--gold);
  font: 400 clamp(2.4rem, 7vw, 5rem)/1 var(--f-display);
  text-shadow: 4px 4px 0 var(--red), 8px 8px 0 var(--ink);
}
.stage-card__name {
  color: var(--text);
  font: 700 clamp(.91rem, 2.08vw, 1.3rem)/1 var(--f-pixel);
  text-shadow: 2px 2px 0 var(--ink);
}

.crt-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, rgb(0 0 0 / .16) 0 1px, transparent 1px 3px),
    radial-gradient(120% 90% at 50% 50%, transparent 60%, rgb(0 0 0 / .45) 100%);
}

@media (max-width: 900px) {
  .controls__hint .controls__keys { display: none; }
}

@media (max-width: 560px) {
  :root { --controls-h: 60px; }
  .stage__body { padding-top: calc(var(--hud-h) + 28px); }
  .controls__hint { display: none; }

  /* En móvil los mandos son una barra sólida: el contenido pasa por detrás sin tapar texto */
  .controls {
    align-items: center;
    padding: 0 var(--gutter);
    background: var(--ink);
    border-top: 3px solid var(--ink);
    pointer-events: auto;
  }
  .ctrl { height: 42px; min-width: 42px; }
  .sound-btn__label { display: none; }
}

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