Aurora Hero

<!-- Aurora Hero — drifting aurora bands behind the headline -->
<section class="nuda-aurorah">
  <div class="nuda-aurorah__band nuda-aurorah__band--a"></div>
  <div class="nuda-aurorah__band nuda-aurorah__band--b"></div>
  <div class="nuda-aurorah__content">
    <h2>Aurora awaits.</h2>
    <button class="nuda-aurorah__btn" type="button">Explore</button>
  </div>
</section>

/* Aurora Hero
   Two screen-blended radial bands drift behind the headline.
   Customize: band colors, --aurorah-accent. */

.nuda-aurorah {
  --aurorah-accent: #e4ff54;
  position: relative;
  width: 100%;
  height: 420px;
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #09090b;
}

.nuda-aurorah__band {
  position: absolute;
  inset: -40% -20%;
  filter: blur(60px);
  opacity: 0.55;
  mix-blend-mode: screen;
  will-change: transform;
}

.nuda-aurorah__band--a {
  background: radial-gradient(50% 40% at 40% 50%, var(--aurorah-accent) 0%, transparent 70%);
  animation: nuda-aurorah-a 9s ease-in-out infinite;
}

.nuda-aurorah__band--b {
  background: radial-gradient(45% 50% at 65% 45%, #34d399 0%, transparent 70%);
  animation: nuda-aurorah-b 11s ease-in-out infinite;
}

.nuda-aurorah__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.nuda-aurorah__content h2 {
  font: 800 clamp(2rem, 5vw, 3.5rem) ui-sans-serif, system-ui, sans-serif;
  color: #fafafa;
  margin: 0;
  letter-spacing: -0.02em;
}

.nuda-aurorah__btn {
  padding: 10px 24px;
  background: rgba(228, 255, 84, 0.12);
  border: 1px solid rgba(228, 255, 84, 0.3);
  color: var(--aurorah-accent);
  font: 700 0.95rem ui-sans-serif, system-ui, sans-serif;
  border-radius: 999px;
  cursor: pointer;
}

@keyframes nuda-aurorah-a {
  0%, 100% { transform: translate(-6%, 0) scale(1); }
  50%      { transform: translate(10%, -6%) scale(1.15); }
}

@keyframes nuda-aurorah-b {
  0%, 100% { transform: translate(6%, 4%) scale(1.1); }
  50%      { transform: translate(-8%, -4%) scale(0.9); }
}

@media (prefers-reduced-motion: reduce) {
  .nuda-aurorah__band { animation: none; }
}