:root {
  color-scheme: dark;
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  background: #02071d;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { background: #02071d; }

.cosmos {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 420px;
  isolation: isolate;
  overflow: hidden;
  background: #031039;
}

.hero {
  position: absolute;
  inset: -.75%;
  display: block;
  transform-origin: 69% 49%;
  will-change: transform;
}

.hero img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 50% 50%;
}

.hero-base { animation: cosmosTurn 34s ease-in-out infinite alternate; }
.hero-drift {
  opacity: .12;
  filter: saturate(1.12) brightness(1.06);
  -webkit-mask-image: radial-gradient(ellipse 44% 58% at 70% 61%, #000 8%, transparent 73%);
  mask-image: radial-gradient(ellipse 44% 58% at 70% 61%, #000 8%, transparent 73%);
  animation: fabricDrift 9s ease-in-out infinite alternate;
}

#starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .62;
  pointer-events: none;
}

.nebula {
  position: absolute;
  inset: -20%;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 18% 57%, rgba(17, 92, 220, .12), transparent 34%),
    radial-gradient(ellipse at 73% 40%, rgba(91, 40, 189, .09), transparent 31%);
  mix-blend-mode: screen;
  animation: nebulaFloat 26s ease-in-out infinite alternate;
}

.star-map { position: absolute; inset: 0; z-index: 4; }

.beacon {
  --size: clamp(42px, 4.1vw, 76px);
  --pulse-min: .72;
  --pulse-max: 1;
  --duration: 3.1s;
  --delay: 0s;
  position: absolute;
  width: var(--size);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  color: #f7fbff;
  text-decoration: none;
  padding: 0;
  border: 0;
  background: transparent;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

.cross-star {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 8%, #d8efff 12%, #79bbff 24%, rgba(54, 132, 255, .52) 42%, transparent 68%);
  filter: drop-shadow(0 0 5px rgba(229, 247, 255, .98)) drop-shadow(0 0 14px rgba(72, 158, 255, .95));
  animation: starPulse var(--duration) ease-in-out var(--delay) infinite;
  will-change: transform, opacity, filter;
  transition: transform .34s cubic-bezier(.2, .8, .2, 1), filter .34s ease, opacity .34s ease;
}

.cross-star::before,
.cross-star::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  translate: -50% -50%;
  background: linear-gradient(to bottom, transparent, rgba(180, 224, 255, .2) 10%, #fff 48%, #fff 52%, rgba(143, 203, 255, .24) 90%, transparent);
  border-radius: 50%;
  box-shadow: 0 0 7px rgba(194, 230, 255, .95);
}

.cross-star::before { width: 10%; height: 146%; }
.cross-star::after {
  width: 146%;
  height: 10%;
  background: linear-gradient(to right, transparent, rgba(180, 224, 255, .2) 10%, #fff 48%, #fff 52%, rgba(143, 203, 255, .24) 90%, transparent);
}

.path-label {
  position: relative;
  z-index: 2;
  opacity: 0;
  transform: scale(.72);
  color: #fff;
  font: 600 clamp(8px, .7vw, 12px)/1.1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: -.04em;
  text-shadow: 0 0 5px #fff, 0 0 14px #5aa8ff, 0 0 24px #2678ff;
  transition: opacity .24s ease, transform .34s cubic-bezier(.2, .8, .2, 1);
  white-space: nowrap;
  pointer-events: none;
}

.beacon-action:hover .cross-star,
.beacon-action:focus-visible .cross-star {
  animation: none;
  transform: scale(1.34);
  opacity: 1;
  filter: brightness(1.18) drop-shadow(0 0 7px #fff) drop-shadow(0 0 22px #68b7ff) drop-shadow(0 0 34px rgba(43, 117, 255, .85));
}

.beacon-action:hover .path-label,
.beacon-action:focus-visible .path-label {
  opacity: 1;
  transform: scale(1);
}

.beacon-action:focus-visible { outline: 1px solid rgba(216, 239, 255, .9); outline-offset: 8px; border-radius: 50%; }
.beacon-decorative { pointer-events: none; opacity: .76; }

.beacon-phonics { left: 8%; top: 20%; --duration: 2.9s; --delay: -1.1s; }
.beacon-deutsch { left: 29%; top: 38%; --duration: 3.7s; --delay: -2.2s; --pulse-min: .66; }
.beacon-3 { left: 17%; top: 57%; --size: clamp(30px, 3.1vw, 58px); --duration: 3.3s; --delay: -1.7s; }
.beacon-4 { left: 42%; top: 13%; --size: clamp(26px, 2.7vw, 50px); --duration: 4.1s; --delay: -3s; }
.beacon-5 { left: 48%; top: 68%; --size: clamp(30px, 3vw, 56px); --duration: 3.5s; --delay: -2.6s; }
.beacon-6 { left: 4%; top: 76%; --size: clamp(24px, 2.5vw, 46px); --duration: 3.9s; --delay: -.8s; }

.vignette {
  position: absolute;
  inset: 0;
  z-index: 6;
  pointer-events: none;
  box-shadow: inset 0 0 120px 32px rgba(0, 4, 26, .62);
}

@keyframes cosmosTurn {
  from { transform: scale(1.006) rotate(-.12deg) translate3d(-.1%, -.1%, 0); }
  to { transform: scale(1.018) rotate(.15deg) translate3d(.15%, .14%, 0); }
}

@keyframes fabricDrift {
  from { transform: scale(1.008) translate3d(-.1%, .06%, 0) skewX(-.06deg); }
  to { transform: scale(1.02) translate3d(.2%, -.12%, 0) skewX(.09deg); }
}

@keyframes nebulaFloat {
  from { transform: translate3d(-2%, -1%, 0) rotate(-1deg); }
  to { transform: translate3d(2%, 1%, 0) rotate(1deg); }
}

@keyframes starPulse {
  0%, 100% { transform: scale(var(--pulse-min)); opacity: .5; filter: drop-shadow(0 0 4px rgba(229, 247, 255, .8)) drop-shadow(0 0 9px rgba(72, 158, 255, .7)); }
  50% { transform: scale(var(--pulse-max)); opacity: 1; filter: drop-shadow(0 0 7px #fff) drop-shadow(0 0 18px rgba(72, 158, 255, 1)); }
}

@media (max-width: 760px) {
  .cosmos { min-height: 520px; }
  .hero { inset: -.5%; }
  .hero img { object-position: 50% 50%; }
  .beacon { --size: clamp(38px, 11vw, 54px); }
  .path-label { font-size: clamp(7px, 2vw, 10px); }
  .beacon-phonics { left: 7%; top: 31%; }
  .beacon-deutsch { left: 30%; top: 47%; }
  .beacon-3 { left: 5%; top: 60%; --size: clamp(28px, 8vw, 42px); }
  .beacon-4 { left: 48%; top: 20%; --size: clamp(24px, 7vw, 38px); }
  .beacon-5 { left: 47%; top: 70%; --size: clamp(26px, 7.5vw, 40px); }
  .beacon-6 { left: 10%; top: 81%; --size: clamp(22px, 6.5vw, 34px); }
  .vignette { box-shadow: inset 0 0 72px 17px rgba(0, 4, 26, .68); }
}

@media (hover: none) {
  .beacon-action .path-label { opacity: .78; transform: scale(.84); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-base, .hero-drift, .nebula, .cross-star { animation: none; }
  .cross-star { opacity: .82; transform: scale(.9); }
}