.portal-loader {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: #100e0b;
  color: #ede7da;
  display: flex;
  min-height: 100vh;
  min-height: 100dvh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 24px;
  box-sizing: border-box;
  text-align: center;
  font: 14px/1.5 system-ui, sans-serif;
}

.portal-loader-logo { position: relative; width: max-content; max-width: 70vw; }
.portal-loader-logo img { display: block; width: auto; height: 104px; max-width: 70vw; object-fit: contain; filter: grayscale(1); opacity: .28; }
.portal-loader-logo .portal-loader-colour {
  position: absolute;
  inset: 0;
  filter: none;
  opacity: 1;
  animation: logo-fill 2.8s ease-in-out infinite alternate;
}
.portal-loader p { margin: 0; letter-spacing: .04em; }
@keyframes logo-fill {
  from { clip-path: inset(100% 0 0); }
  to { clip-path: inset(0 0 0); }
}
@media (prefers-reduced-motion: reduce) {
  .portal-loader-logo .portal-loader-colour { animation: none; }
}