.intro {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse 80% 70% at 50% 45%, #1a2e1f 0%, #080807 70%);
  opacity: 1;
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro.is-hidden {
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}

.intro.is-exiting {
  opacity: 0;
}

.intro__veil {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
  opacity: 0.35;
}

.intro__content {
  position: relative;
  text-align: center;
  padding: 48px 32px;
  max-width: 520px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
    transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s;
}

.intro.is-revealed .intro__content {
  opacity: 1;
  transform: translateY(0);
}

.intro__crest {
  width: 64px;
  height: 72px;
  margin: 0 auto 28px;
  color: var(--gold);
  opacity: 0.7;
}

.intro__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ivory);
  margin-bottom: 12px;
}

.intro__subtitle {
  font-size: 0.6875rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 40px;
}

.intro__line {
  width: 120px;
  height: 1px;
  margin: 0 auto 32px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.5;
}

.intro__enter {
  padding: 14px 36px;
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ivory);
  background: rgba(26, 46, 31, 0.6);
  border: 1px solid rgba(201, 169, 98, 0.35);
  cursor: pointer;
  transition: border-color 0.4s, color 0.4s, box-shadow 0.4s;
}

.intro__enter:hover {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 32px rgba(201, 169, 98, 0.15);
}

.intro__loader {
  position: absolute;
  bottom: 48px;
  left: 50%;
  width: 48px;
  height: 1px;
  margin-left: -24px;
  background: rgba(201, 169, 98, 0.2);
  overflow: hidden;
}

.intro__loader::after {
  content: '';
  display: block;
  width: 40%;
  height: 100%;
  background: var(--gold);
  animation: intro-load 1.8s cubic-bezier(0.22, 1, 0.36, 1) infinite;
}

@keyframes intro-load {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(280%); }
}

.atlas-world:not(.is-ready) .world-viewport {
  opacity: 0;
}

.atlas-world.is-ready .world-viewport {
  opacity: 1;
  transition: opacity 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}