.section-title * {
  box-sizing: border-box;
}

.section-title {
  margin: 0;
  height: 50vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  font-family: 'Helvetica', sans-serif;
}

.section-title .thumbnail-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 8vw;
  flex-wrap: wrap;
  margin-left: 160px;
}

/* 등장 애니메이션 초기 상태 */
.section-title .design-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

/* ✅ 그림자와 스케일 분리된 버튼 구조 */
.section-title .design-button {
  position: relative;
  width: min(15vw, 240px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background-color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: transform 0.7s ease-out;
  z-index: 1;
}

/* 가짜요소로 그림자 구현 */
.section-title .design-button::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  z-index: -1;
  transition: box-shadow 0.3s ease;
}

/* Hover 시 원 확대 */
.section-title .design-button:hover {
  transform: scale(1.08);
}

.section-title .design-button:hover::before {
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

/* 이미지 컨테이너 */
.section-title .design-button img {
  width: 70%;
  height: 70%;
  object-fit: contain;
  border-radius: 50%;
  pointer-events: none;
  transition: transform 0.3s ease-out;
  overflow: hidden;
}

/* Hover 시 이미지 확대 */
.section-title .design-button:hover img {
  transform: scale(1.15);
}

.section-title .design-label {
  margin-top: 1.5em;
  font-size: 1.2rem;
  font-weight: 600;
  color: #000;
  text-align: center;
}

/* 등장 애니메이션 활성 상태 */
.section-title .show {
  opacity: 1;
  transform: scale(1);
}

@media (max-width: 768px) {
  .section-title .design-button {
    width: 30vw;
  }
}