/* =========================
   기본 설정
========================= */
body {
  font-family: 'Pretendard', sans-serif;
  background-color: #FFFFFF; /* ✨ 전체 흰색 배경 */
  margin: 0;
  color: #2E4A3D; /* 기본 글자색 (카키 톤) */
}

/* =========================
   헤더 영역
========================= */
header {
  text-align: center;
  background: #FFFFFF; /* 흰색으로 통일 */
  padding: 2rem 1rem;
  border-bottom: 1px solid #E0E0E0; /* 은은한 회색 구분선 */
}

header h1 {
  font-size: 2rem;
  margin: 0.3rem 0;
  color: #2E4A3D;
}

header p {
  color: #3E6651;
  margin-top: 0.5rem;
}

/* 로고 + 제목 정렬 */
.title-wrap {
  display: flex;
  align-items: center;       /* 수직 중앙 정렬 */
  justify-content: center;   /* 가운데 정렬 */
  gap: 10px;                 /* 로고와 글자 간격 */
}

.logo {
  width: 60px;               /* 로고 크기 */
  height: auto;
  margin-bottom: 0;
}

/* =========================
   카드 전시관 (gallery)
========================= */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}

.book-card {
  background-color: #FFFFFF;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); /* ✨ 그림자 강조 */
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.book-card img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
}

.book-card h3 {
  margin: 0.8rem 0 0.3rem;
  color: #2E4A3D;
}

.book-card p {
  margin-bottom: 1rem;
  color: #3E6651;
  font-size: 0.9rem;
}

/* =========================
   모달 팝업
========================= */
.modal {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(40, 70, 50, 0.6);
}

.modal-content {
  background-color: #FFFFFF;
  margin: 5% auto;
  padding: 20px;
  border-radius: 20px;
  width: 80%;
  max-width: 600px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(40, 100, 60, 0.3);
}

.modal-content img {
  width: 70%;
  border-radius: 10px;
}

.close {
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  color: #5EB883;
}

.close:hover {
  color: #2E4A3D;
}

/* =========================
   버튼
========================= */
.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 10px 20px;
  background: #6FCF97; /* 민트그린 포인트 */
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s ease;
}

.button:hover {
  background: #5EB883;
}

/* =========================
   푸터 영역
========================= */
footer {
  text-align: center;
  padding: 1rem;
  background-color: #FFFFFF; /* ✨ 흰색으로 통일 */
  color: #666;
  border-top: 1px solid #E0E0E0;
}