header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 70px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-sizing: border-box;
}

.logo {
  font-size: 1.6em;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

.auth-buttons button {
  color: #fff;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
}