@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@500;600&display=swap');

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  display: grid;
  /* Logo and spacer share a column width so the nav stays truly centered. */
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0.5rem 1.25rem;
  background: rgba(128, 128, 128, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  font-family: 'Cormorant Garamond', 'Georgia', serif;
}

.site-header__logo {
  position: relative;
  justify-self: start;
  display: block;
  line-height: 0;
}

/* Arrow pointing back at the logo: fades in after a few seconds, then
   bounces toward it once every 5 seconds. */
.site-header__arrow {
  position: absolute;
  left: 100%;
  top: calc(50% - 12px);
  width: 48px;
  height: 24px;
  margin-left: 0.4rem;
  color: #ffffff;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.5));
  pointer-events: none;
  opacity: 0;
  animation:
    arrow-appear 0.8s ease-out 3s forwards,
    arrow-bounce 5s ease-in-out 3.8s infinite;
}

@keyframes arrow-appear {
  to { opacity: 1; }
}

@keyframes arrow-bounce {
  0%, 20%, 100% { transform: translateX(0); }
  5%  { transform: translateX(-12px); }
  10% { transform: translateX(0); }
  15% { transform: translateX(-6px); }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__arrow {
    animation: arrow-appear 0.8s ease-out 3s forwards;
  }
}

.site-header__logo img {
  height: 72px;
  width: auto;
}

.site-header__nav {
  display: flex;
  gap: 2.5rem;
}

.site-header__nav a {
  color: #ffffff;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.5);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.site-header__nav a:hover,
.site-header__nav a:focus-visible,
.site-header__nav a[aria-current="page"] {
  border-bottom-color: #ffffff;
}

@media (max-width: 600px) {
  .site-header {
    padding: 0.4rem 0.75rem;
  }

  .site-header__logo img {
    height: 52px;
  }

  .site-header__arrow {
    width: 32px;
    top: calc(50% - 8px);
    height: 16px;
    margin-left: 0.25rem;
  }

  .site-header__nav {
    gap: 1.25rem;
  }

  .site-header__nav a {
    font-size: 1.1rem;
    letter-spacing: 0.15em;
  }
}