.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: rgba(20, 24, 31, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(245, 241, 234, 0.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header__logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-cream);
}

.site-header__logo span {
  color: var(--color-sky);
}

.site-header__burger {
  background: none;
  border: none;
  color: var(--color-cream);
  font-size: 1.4rem;
  padding: var(--space-2);
  cursor: pointer;
  transition: color 0.2s ease, transform 0.3s var(--ease-spring);
}

.site-header__burger:hover {
  color: var(--color-sky);
}

.site-header__burger:focus-visible {
  outline: 2px solid var(--color-sky);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-ink-elevated);
  box-shadow: var(--shadow-floating);
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--space-5) var(--space-5);
  transform: translateY(-8px);
  opacity: 0;
  transition: transform 0.3s var(--ease-spring), opacity 0.2s ease;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu--open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu__link {
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(245, 241, 234, 0.08);
  font-weight: 600;
  color: var(--color-cream);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-menu__link:last-child {
  border-bottom: none;
}

.mobile-menu__link:hover {
  color: var(--color-sky);
  padding-left: var(--space-2);
}

.top-nav {
  display: none;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  justify-content: space-around;
  background-color: rgba(31, 39, 51, 0.96);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(245, 241, 234, 0.08);
  padding: var(--space-2) 0 calc(var(--space-2) + env(safe-area-inset-bottom, 0));
}

.bottom-nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  transition: color 0.2s ease, transform 0.2s var(--ease-spring);
}

.bottom-nav__link i {
  font-size: 1.1rem;
}

.bottom-nav__link:hover,
.bottom-nav__link:focus-visible {
  color: var(--color-sky);
  transform: translateY(-2px);
}

.bottom-nav__link--active {
  color: var(--color-sky);
}

@media (min-width: 48rem) {
  .site-header__burger {
    display: none;
  }

  .mobile-menu {
    display: none !important;
  }

  .top-nav {
    display: flex;
    gap: var(--space-6);
  }

  .top-nav__link {
    font-weight: 600;
    color: var(--color-text-muted);
    position: relative;
    padding: var(--space-2) 0;
    transition: color 0.2s ease;
  }

  .top-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background-color: var(--color-sky);
    transition: width 0.3s var(--ease-spring);
  }

  .top-nav__link:hover,
  .top-nav__link--active {
    color: var(--color-cream);
  }

  .top-nav__link:hover::after,
  .top-nav__link--active::after {
    width: 100%;
  }

  .bottom-nav {
    display: none;
  }
}