body{
    margin: 0;
    font-family: Arial, sans-serif;
}
header {
  background: linear-gradient(135deg, #e0f7fa, #80deea); /* 투명도 제거 */
  padding: 20px 40px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  animation: fadeInDown 1s ease-out;
}
main{
    min-height: calc(100vh - 100px); /* 헤더와 푸터 높이를 뺀 나머지 공간 차지 */
    padding: 20px;
    box-sizing: border-box;
    justify-content: center;
}
a{
    text-decoration: none;
    color: black;
}




header > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap; /* 줄바꿈 허용 */
  gap: 10px;        /* 요소 간 여백 */
}

header h1 {
  font-size: 28px;
  color: #00796b;
  margin: 0;
  flex-shrink: 0; /* 줄어들지 않게 */
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap; /* 메뉴 줄바꿈 허용 */
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav ul li a {
  text-decoration: none;
  font-size: 16px;
  color: #004d40;
  padding: 8px 12px;
  border-radius: 6px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}
nav ul li a:hover {
  background-color: #b2dfdb;
  transform: translateY(-2px);
}

/* 모바일 대응 */
@media (max-width: 600px) {
  header > div {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
  }
}