:root {
  --nav-bg: #ffffff;
  --nav-text: #000000;
  --nav-hover-bg: rgba(0,0,0,0.05);
  --btn-bg: rgba(0,0,0,0.1);
  --transition-speed: 0.25s;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--nav-bg);
  padding: 0.5625rem 1.125rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo-icon {
  width: 48px;
  height: auto;
  transition: transform var(--transition-speed) ease;
}

.logo-icon:hover {
  transform: translateY(-4px);
}

.menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.menu a {
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.9rem;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  transition: background var(--transition-speed) ease;
}

.menu a:hover {
  background: var(--nav-hover-bg);
}

.btn-book {
  background: var(--btn-bg);
  color: var(--nav-text);
  font-size: 0.9rem;
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 400;
  transition: background var(--transition-speed) ease;
}

.btn-book:hover {
  background: var(--nav-hover-bg);
}

@media (max-width: 768px) {
  .site-nav {
    flex-direction: column;
    text-align: center;
    padding: 0.5625rem 1.125rem;
  }
  .menu {
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
  }
  .btn-book {
    margin-top: 1rem;
    width: 100%;
  }
}