body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

header {
  background-color: #1976d2;
  color: white;
  padding: 2vh 5vw;
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  z-index: 999;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.logo img {
  width: 80px;
  height: 80px;
  cursor: pointer;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 10px;
}

.nav-link {
  color: white;
  text-decoration: none;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: center;
  }

  nav {
    justify-content: center;
    margin-top: 1vh;
  }
}