body {
  font-family: "Noto Sans TC", sans-serif;
  text-align: center;
  background-color: #fff;
  color: #2C3144;
  margin: 0;
  padding: 0;
}

/* Tiêu đề */
h2 {
  margin-top: 30px;
  font-size: 28px;
  font-weight: 700;
}

/* Thanh danh mục */
.category-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: 20px 0;
}

.category-bar button {
  background: none;
  border: none;
  margin: 5px 10px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 15px;
  border-radius: 6px;
  transition: 0.3s;
  color: #2C3144;
}

.category-bar button.active {
  background-color: #2C3144;
  color: white;
}

/* Lưới ảnh */
.diadiem {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto 50px;
  padding: 10px;
  justify-items: center;
}

.diadiem-item {
  max-width: 300px;       /* giới hạn chiều rộng mỗi khung hình */
  width: 100%;
  transition: transform 0.3s, box-shadow 0.3s;
}

.diadiem-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}

.diadiem-item:hover {
  transform: translateY(-5px);
}

.country-name {
  margin-top: 10px;
  font-size: 18px;
  font-weight: 600;
}