/* Asteroid easter egg. Kept separate from the HUD stylesheet on purpose. */

body.asteroid-transitioning,
body.asteroid-playing {
  overflow: hidden;
}

body.asteroid-transitioning #bg-canvas,
body.asteroid-playing #bg-canvas {
  opacity: 0;
  transition: opacity 420ms ease;
}

body.asteroid-transitioning .palette,
body.asteroid-playing .palette,
body.asteroid-transitioning .eot,
body.asteroid-playing .eot,
body.asteroid-transitioning .xhair,
body.asteroid-playing .xhair,
body.asteroid-transitioning .palette-fab,
body.asteroid-playing .palette-fab {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body.asteroid-playing .topbar {
  transform: translateY(-110%);
  transition: transform 620ms cubic-bezier(.77, 0, .175, 1);
}

body.asteroid-playing .topnav,
body.asteroid-playing .topbar-status {
  pointer-events: none;
}

/* Fixed overlay that owns the flying panels: gives them a real 3D
   perspective and a viewport-true containing block. */
.asteroid-gates {
  position: fixed;
  inset: 0;
  z-index: 880;
  pointer-events: none;
  perspective: 1300px;
  perspective-origin: 50% 46%;
  transform-style: preserve-3d;
}

.module.asteroid-panel {
  margin: 0 !important;
  max-height: none;
  overflow: hidden;
  opacity: 0.95;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34), 0 0 28px rgba(55, 185, 241, 0.10);
  will-change: top, left, width, height, transform, opacity;
  transition:
    top 980ms cubic-bezier(.2, .85, .15, 1),
    left 980ms cubic-bezier(.2, .85, .15, 1),
    width 980ms cubic-bezier(.2, .85, .15, 1),
    height 980ms cubic-bezier(.2, .85, .15, 1),
    transform 980ms cubic-bezier(.2, .85, .15, 1),
    opacity 340ms ease;
}

.module.asteroid-panel .module-body {
  height: 100%;
  overflow: hidden;
}

.module.asteroid-panel--gate {
  transition:
    top 900ms cubic-bezier(.77, 0, .175, 1),
    left 900ms cubic-bezier(.77, 0, .175, 1),
    width 900ms cubic-bezier(.77, 0, .175, 1),
    height 900ms cubic-bezier(.77, 0, .175, 1),
    transform 1100ms cubic-bezier(.77, 0, .175, 1),
    opacity 420ms ease;
}

.module.asteroid-panel--left {
  transform-origin: left center;
  opacity: 0.55;
  filter: drop-shadow(22px 18px 26px rgba(0, 0, 0, 0.42));
}

.module.asteroid-panel--right {
  transform-origin: right center;
  opacity: 0.55;
  filter: drop-shadow(-22px 18px 26px rgba(0, 0, 0, 0.42));
}

/* subtle hover-in-space drift once the corridor is formed */
body.asteroid-playing .module.asteroid-panel--gate .module-body {
  animation: asteroid-gate-float 6s ease-in-out infinite alternate;
}

body.asteroid-playing .module.asteroid-panel--gate:nth-child(odd) .module-body {
  animation-duration: 7.2s;
  animation-delay: -2.4s;
}

@keyframes asteroid-gate-float {
  from { transform: translateZ(0px); }
  to   { transform: translateZ(16px); }
}

.asteroid-menu {
  position: fixed;
  top: 8px;
  left: max(16px, calc((100vw - 1180px) / 2));
  right: max(16px, calc((100vw - 1180px) / 2));
  width: auto;
  height: var(--topbar-h);
  z-index: 1200;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 0 var(--space-md);
  background: linear-gradient(to bottom, rgba(5, 10, 20, 0.96), rgba(5, 10, 20, 0.74));
  border: 1px solid rgba(74, 222, 128, 0.35);
  box-shadow: 0 18px 52px rgba(74, 222, 128, 0.10), 0 26px 80px rgba(0, 0, 0, 0.34);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transform: translate3d(0, -130%, 0);
  transform-origin: top center;
  transition: transform 620ms cubic-bezier(.2, .85, .15, 1);
}

.asteroid-menu > span:nth-child(2) { justify-self: center; text-align: center; }
.asteroid-menu .asteroid-exit { justify-self: end; }

body.asteroid-playing .asteroid-menu {
  transform: translate3d(0, 0, 0);
}

.asteroid-menu strong {
  color: var(--white);
  font-weight: 700;
}

.asteroid-exit {
  background: none;
  border: 1px solid rgba(74, 222, 128, 0.35);
  color: var(--green);
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  padding: 6px 10px;
  cursor: pointer;
  text-transform: uppercase;
}

.asteroid-exit:hover {
  border-color: var(--green);
  color: var(--white);
}

.asteroid-stage {
  position: fixed;
  inset: 0;
  z-index: 850;
  pointer-events: none;
  opacity: 0;
  transition: opacity 520ms ease;
}

body.asteroid-playing .asteroid-stage,
body.asteroid-transitioning .asteroid-stage {
  opacity: 1;
}

.asteroid-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
}

/* Intro / game-over overlay sits above the corridor panels. */
.asteroid-intro {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  pointer-events: none;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--cyan-hi);
  text-align: center;
  text-shadow: 0 0 24px rgba(55, 185, 241, 0.5);
  opacity: 1;
  transition: opacity 360ms ease;
}

.asteroid-intro-inner {
  min-height: 14rem;
  display: grid;
  place-items: center;
  gap: 1rem;
  padding: 0 1rem;
  background: radial-gradient(ellipse at center, rgba(5, 8, 15, 0.72) 0%, rgba(5, 8, 15, 0) 70%);
}

.asteroid-intro-kicker {
  font-size: clamp(1.1rem, 3vw, 2.3rem);
  color: var(--amber);
  animation: asteroid-flash 140ms steps(2, end) infinite;
}

.asteroid-intro-line {
  max-width: min(820px, 86vw);
  min-height: 2.4em;
  font-size: clamp(1rem, 2.4vw, 1.9rem);
}

.asteroid-countdown {
  min-height: 1.2em;
  font-family: var(--font-display);
  font-size: clamp(4rem, 18vw, 11rem);
  line-height: 1;
  color: var(--white);
  text-shadow: 0 0 42px rgba(74, 222, 128, 0.45);
}

.asteroid-intro-controls {
  min-height: 1.4em;
  font-size: clamp(0.6rem, 1.1vw, 0.78rem);
  letter-spacing: 0.22em;
  color: var(--steel);
}

@keyframes asteroid-flash {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@media (prefers-reduced-motion: reduce) {
  .module.asteroid-panel,
  .module.asteroid-panel--gate,
  .asteroid-menu,
  .asteroid-stage,
  .asteroid-intro {
    transition-duration: 1ms !important;
  }

  body.asteroid-playing .module.asteroid-panel--gate .module-body {
    animation: none;
  }

  .asteroid-intro-kicker {
    animation: none;
  }
}