/* Living nebula — code only, strong motion */

body {
  min-height: 100vh;
  background: #ffffff;
  overflow-x: hidden;
}

.nebula-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background: #7980ce;
}

/* Layer 1 — cyan core */
.nebula-bg .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  mix-blend-mode: screen;
  will-change: transform;
}

.nebula-bg .b1 {
  width: 55vmax;
  height: 55vmax;
  left: 5%;
  top: 15%;
  background: radial-gradient(circle, rgba(0, 230, 255, 0.85) 0%, rgba(0, 120, 200, 0.2) 45%, transparent 70%);
  animation: move1 8s ease-in-out infinite alternate;
}

/* Layer 2 — purple center */
.nebula-bg .b2 {
  width: 50vmax;
  height: 50vmax;
  left: 35%;
  top: 20%;
  background: radial-gradient(circle, rgba(180, 50, 255, 0.75) 0%, rgba(90, 20, 180, 0.25) 45%, transparent 70%);
  animation: move2 7s ease-in-out infinite alternate;
}

/* Layer 3 — orange fire */
.nebula-bg .b3 {
  width: 60vmax;
  height: 60vmax;
  right: -10%;
  top: 0%;
  background: radial-gradient(circle, rgba(255, 130, 30, 0.9) 0%, rgba(255, 60, 20, 0.35) 40%, transparent 70%);
  animation: move3 9s ease-in-out infinite alternate;
}

/* Layer 4 — deep blue */
.nebula-bg .b4 {
  width: 45vmax;
  height: 45vmax;
  left: 10%;
  bottom: -5%;
  background: radial-gradient(circle, rgba(30, 80, 255, 0.6) 0%, transparent 65%);
  animation: move4 6.5s ease-in-out infinite alternate;
}

/* Layer 5 — magenta accent */
.nebula-bg .b5 {
  width: 40vmax;
  height: 40vmax;
  right: 15%;
  bottom: 10%;
  background: radial-gradient(circle, rgba(255, 40, 120, 0.5) 0%, transparent 65%);
  animation: move5 8.5s ease-in-out infinite alternate;
}

/* bright core flash */
.nebula-bg .core {
  position: absolute;
  width: 20vmax;
  height: 20vmax;
  left: 50%;
  top: 40%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 255, 220, 0.55) 0%, rgba(255, 180, 80, 0.25) 35%, transparent 70%);
  filter: blur(25px);
  animation: corePulse 4s ease-in-out infinite alternate;
  mix-blend-mode: screen;
}

/* readability veil */
.nebula-bg .veil {
  position: absolute;
  inset: 0;
  background: rgba(3, 5, 18, 0.4);
}

@keyframes move1 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(18%, 12%) scale(1.25); }
}

@keyframes move2 {
  0%   { transform: translate(0, 0) scale(1.1); }
  100% { transform: translate(-15%, 10%) scale(1.3); }
}

@keyframes move3 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-12%, 15%) scale(1.2); }
}

@keyframes move4 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(20%, -10%) scale(1.35); }
}

@keyframes move5 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-18%, -12%) scale(1.28); }
}

@keyframes corePulse {
  0%   { opacity: 0.5; transform: translate(-50%, -50%) scale(0.85); }
  100% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

@media (prefers-reduced-motion: reduce) {
  .nebula-bg .blob,
  .nebula-bg .core {
    animation: none !important;
  }
}