.main-header {
  position: sticky;
  top: 0;
  background: rgba(246,245,239,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-weight: 800;
  color: #2f6f4f;
}

.menu {
  display: flex;
  gap: 1.5rem;
}

.menu a {
  text-decoration: none;
  color: #1f2937;
  font-weight: 500;
}

.btn-header {
  background: #2f6f4f;
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
}