/* BIW Nexus Portal v7.1 FINAL – Galaxy Background FIX
   Fix: remove negative z-index background (some browsers hide it behind body),
        use z-index layering and make the galaxy slightly more visible.
*/

:root{
  --bg: #000;
  --tooltip-bg: rgba(8, 12, 20, 0.82);
  --tooltip-fg: rgba(255,255,255,0.92);
  --ring: rgba(255,255,255,0.20);
  --ring2: rgba(255,140,60,0.16);
  --ring3: rgba(80,170,255,0.14);
}

*{ box-sizing: border-box; }
html, body{
  height: 100%;
  margin: 0;
  background: var(--bg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  overflow-x: hidden;
}

body{ position: relative; }

/* --- Galaxy background (more visible, still subtle) --- */
.galaxy{
  position: fixed;
  inset: 0;
  z-index: 0;                 /* <-- FIX: no negative z-index */
  pointer-events: none;

  /* 3 layers: nebula, stars, vignette */
  background:
    radial-gradient(1200px 700px at 30% 35%, rgba(40,110,255,0.12), transparent 60%),
    radial-gradient(900px 600px at 70% 65%, rgba(255,140,60,0.09), transparent 62%),
    radial-gradient(700px 500px at 55% 20%, rgba(120,200,255,0.08), transparent 60%),

    radial-gradient(circle at 10% 30%, rgba(255,255,255,0.40) 0 1px, transparent 2px),
    radial-gradient(circle at 22% 62%, rgba(255,255,255,0.28) 0 1px, transparent 2px),
    radial-gradient(circle at 38% 18%, rgba(255,255,255,0.32) 0 1px, transparent 2px),
    radial-gradient(circle at 62% 28%, rgba(255,255,255,0.24) 0 1px, transparent 2px),
    radial-gradient(circle at 78% 44%, rgba(255,255,255,0.28) 0 1px, transparent 2px),
    radial-gradient(circle at 88% 70%, rgba(255,255,255,0.32) 0 1px, transparent 2px),
    radial-gradient(circle at 52% 82%, rgba(255,255,255,0.22) 0 1px, transparent 2px),
    radial-gradient(circle at 15% 85%, rgba(255,255,255,0.25) 0 1px, transparent 2px),

    radial-gradient(ellipse at center, rgba(0,0,0,0.00) 0%, rgba(0,0,0,0.55) 70%, rgba(0,0,0,0.85) 100%);
  animation: galaxy-drift 22s ease-in-out infinite;
}

.galaxy::before{
  content:"";
  position:absolute;
  inset:-40px;
  background:
    radial-gradient(circle at 12% 12%, rgba(255,255,255,0.20) 0 1px, transparent 2px),
    radial-gradient(circle at 32% 48%, rgba(255,255,255,0.16) 0 1px, transparent 2px),
    radial-gradient(circle at 58% 22%, rgba(255,255,255,0.14) 0 1px, transparent 2px),
    radial-gradient(circle at 74% 58%, rgba(255,255,255,0.16) 0 1px, transparent 2px),
    radial-gradient(circle at 90% 18%, rgba(255,255,255,0.15) 0 1px, transparent 2px);
  opacity: .55;
  animation: stars-drift 30s linear infinite;
}

@keyframes galaxy-drift{
  0%   { transform: translate3d(0,0,0) scale(1.02); filter: brightness(1.00); }
  50%  { transform: translate3d(-14px, 10px, 0) scale(1.03); filter: brightness(1.08); }
  100% { transform: translate3d(0,0,0) scale(1.02); filter: brightness(1.00); }
}
@keyframes stars-drift{
  from { transform: translate3d(0,0,0); }
  to   { transform: translate3d(-28px, 18px, 0); }
}

.stage{
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  position: relative;
  z-index: 1; /* above galaxy */
}

.nexus{
  position: relative;
  display: inline-block;
  width: min(92vw, 1100px);
}

.base{
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  user-select: none;
  -webkit-user-drag: none;
}

/* overlays */
.overlay{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transform: scale(1.0);
  transition: opacity .16s ease, transform .22s ease, filter .22s ease;
  filter: brightness(1.0) contrast(1.0) saturate(1.0);
}

/* hotspots */
.hotspot{
  position:absolute;
  border-radius:50%;
  cursor:pointer;
  background:transparent;
  z-index:5;
}


.hotspot:hover::after,
.hotspot:focus-visible::after{
  opacity: 1;
  transform: translate(-50%, -110%);
}

/* hotspot positions */
.hs-core{ left: 5.37%; top: 20.02%; width: 30.27%; height: 30.27%; }
.hs-portal{ left: 65.43%; top: 20.02%; width: 30.27%; height: 30.27%; }
.hs-network{ left: 37.30%; top: 8.30%; width: 25.39%; height: 25.39%; }
.hs-phoenix{ left: 29.98%; top: 50.78%; width: 40.04%; height: 40.04%; }

/* overlay clips */
.ov-core{ --cx: 20.505%; --cy: 35.155%; clip-path: circle(15.135% at var(--cx) var(--cy)); transform-origin: var(--cx) var(--cy); }
.ov-portal{ --cx: 80.565%; --cy: 35.155%; clip-path: circle(15.135% at var(--cx) var(--cy)); transform-origin: var(--cx) var(--cy); }
.ov-network{ --cx: 49.995%; --cy: 20.995%; clip-path: circle(12.695% at var(--cx) var(--cy)); transform-origin: var(--cx) var(--cy); }
.ov-phoenix{ --cx: 50%; --cy: 70.8%; clip-path: circle(20.02% at var(--cx) var(--cy)); transform-origin: var(--cx) var(--cy); }

/* hover animations */

.hotspot:focus-visible{
  outline: 2px solid rgba(255,255,255,0.35);
  outline-offset: 2px;
}

  50%      { transform: scale(1.15) rotate(1.2deg); }
}
  to   { transform: scale(1.12) rotate(360deg); }
}
  50%     { transform: scale(1.22); filter: brightness(1.38) contrast(1.18) saturate(1.22); }
}
  50%     { transform: scale(1.17) translateY(-2px); filter: brightness(1.36) contrast(1.18) saturate(1.26); }
}

@media (prefers-reduced-motion: reduce){
  .galaxy, .galaxy::before{ animation: none; }
  }