.app-header {
  --app-header-progress: 0;
  isolation: isolate;
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  animation: app-header-enter 550ms ease-out both;
}

.app-header::before {
  position: absolute;
  z-index: 0;
  inset: 0;
  background: color-mix(in srgb, var(--app-bg) 98%, transparent);
  content: "";
  opacity: var(--app-header-progress);
  pointer-events: none;
  -webkit-backdrop-filter: blur(36px) saturate(165%);
  backdrop-filter: blur(36px) saturate(165%);
  -webkit-mask-image: linear-gradient(
    to bottom,
    black 0%,
    rgb(0 0 0 / 96%) 38%,
    rgb(0 0 0 / 68%) 72%,
    transparent 100%
  );
  mask-image: linear-gradient(
    to bottom,
    black 0%,
    rgb(0 0 0 / 96%) 38%,
    rgb(0 0 0 / 68%) 72%,
    transparent 100%
  );
  transition: opacity 120ms linear;
}

.app-header::after {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--app-header-line) 55%, transparent),
    transparent 18%,
    transparent 100%
  );
  content: "";
  opacity: var(--app-header-progress);
  pointer-events: none;
  transition: opacity 120ms linear;
}

.app-header > div {
  position: relative;
  z-index: 1;
}

.app-logo-mark {
  background: linear-gradient(145deg, #75baff 0%, #2c78cd 100%);
}

.app-grid {
  background-image:
    linear-gradient(to right, var(--app-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--app-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgb(0 0 0 / 55%), transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, rgb(0 0 0 / 55%), transparent 78%);
}

.app-orb {
  position: absolute;
  width: 30rem;
  height: 30rem;
  border-radius: 9999px;
  background: rgb(83 158 237 / 14%);
  filter: blur(80px);
  pointer-events: none;
}

.app-orb-left {
  top: 20%;
  left: -20rem;
}

.app-orb-right {
  right: -20rem;
  bottom: 10%;
}

@keyframes app-header-enter {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-header {
    animation: none;
    transition: none;
  }
}