@import url("https://fonts.googleapis.com/css2?family=Exo+2:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700&family=Orbitron:wght@500;600;700;800&display=swap");

:root {
  --font-body: "Exo 2", "Noto Sans JP", sans-serif;
  --font-display: "Orbitron", "Exo 2", "Noto Sans JP", sans-serif;
  --bg-deep-top: #09111f;
  --bg-deep-mid: #070a16;
  --bg-deep-bottom: #070813;
  --glow-purple: rgba(154, 72, 255, 0.16);
  --glow-cyan: rgba(35, 198, 255, 0.12);
}

.nav-home-link,
.nav-site-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: #dce8ff;
  background: rgba(12, 18, 38, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  z-index: 2;
}

.nav-home-link:hover,
.nav-site-link:hover {
  transform: translateY(-1px);
  border-color: rgba(144, 85, 255, 0.45);
  background: rgba(20, 28, 52, 0.88);
  color: #f5f7ff;
  text-decoration: none;
}

.nav-home-link {
  position: absolute;
  top: 1.15rem;
  left: max(1rem, calc(50% - 480px));
}

.nav-site-link {
  position: absolute;
  top: 1.15rem;
  right: max(1rem, calc(50% - 480px));
}

.nav-site-link--left {
  left: max(1rem, calc(50% - 480px));
  right: auto;
}

.nav-site-link--play {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 25;
}

footer .nav-home-link,
footer .nav-site-link {
  position: static;
  margin-bottom: 0.35rem;
}

@media (max-width: 640px) {
  .nav-home-link,
  .nav-site-link--left {
    left: 1rem;
    top: 0.85rem;
    padding: 0.3rem 0.65rem;
    font-size: 0.66rem;
  }

  .nav-site-link:not(.nav-site-link--left):not(.nav-site-link--play) {
    right: 1rem;
    top: 0.85rem;
    padding: 0.3rem 0.65rem;
    font-size: 0.66rem;
  }
}