.gallery.no-thumbs {
  grid-template-columns: 1fr;
}

.gallery.no-thumbs .main-img-wrap {
  min-height: calc(100vh - 60px);
  background: #f6f6f6;
}

/* thumbs 있는 갤러리: 레일이 메인에 가려지지 않게 */
.gallery:not(.no-thumbs) {
  grid-template-columns: 88px minmax(0, 1fr);
}
.gallery:not(.no-thumbs) .thumbs {
  position: relative;
  z-index: 3;
  min-width: 88px;
  width: 88px;
  background: #fff;
  padding: 8px;
  gap: 8px;
  border-right: 1px solid var(--border, #e8e8e8);
}
.gallery:not(.no-thumbs) .thumb {
  opacity: 0.85;
  border: 1px solid #d0d0d0;
  background: #f0f0f0;
  min-height: 72px;
}
.gallery:not(.no-thumbs) .thumb.active,
.gallery:not(.no-thumbs) .thumb:hover {
  opacity: 1;
  outline: 1px solid var(--accent, #111);
}
.gallery:not(.no-thumbs) .main-img-wrap {
  min-height: 0;
  height: 100%;
  min-width: 0;
  background: #f6f6f6;
  overflow: hidden;
}

.gallery .main-img-wrap img {
  /* product.css에서 object-fit: cover는 유지하되,
     세럼 상세 이미지가 라벨/병 중심부에 오도록 위치만 보정 */
  object-position: center 45%;
}

@media (max-width: 900px) {
  .gallery:not(.no-thumbs) {
    grid-template-columns: 72px minmax(0, 1fr);
  }
  .gallery:not(.no-thumbs) .thumbs {
    min-width: 72px;
    width: 72px;
  }
}

.serum-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.serum-meta-card {
  border: 1px solid var(--border);
  padding: 1rem;
  background: #fff;
}

.serum-meta-label {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
}

.serum-meta-body {
  font-size: 0.84rem;
  color: var(--body);
  line-height: 1.75;
}

.serum-panel {
  border-top: 1px solid var(--border);
  padding: 5rem 2.5rem;
}

.serum-panel-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.serum-panel-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: start;
}

.serum-copy h2,
.serum-actives h2,
.serum-slot-note h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 900;
  text-transform: uppercase;
  line-height: 1.08;
  margin-bottom: 1rem;
}

.serum-copy p,
.serum-slot-note p {
  font-size: 0.92rem;
  color: var(--body);
  line-height: 1.95;
  margin-bottom: 1rem;
  max-width: 58ch;
}

.serum-actives-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.serum-active-card {
  border: 1px solid var(--border);
  padding: 1.15rem;
  background: #fff;
}

.serum-active-card h3 {
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 0.35rem;
}

.serum-active-dose {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.7rem;
}

.serum-active-card p {
  font-size: 0.82rem;
  color: var(--body);
  line-height: 1.75;
}

.serum-specs {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.serum-spec {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.serum-spec:last-child {
  border-bottom: none;
}

.serum-spec dt {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.serum-spec dd {
  font-size: 0.9rem;
  color: var(--body);
  line-height: 1.85;
}

.serum-cta {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.serum-btn,
.serum-btn-ghost {
  display: inline-block;
  padding: 0.95rem 1.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--accent);
}

.serum-btn {
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  appearance: none;
}
button.serum-btn:hover { opacity: 0.9; }

.serum-btn-ghost {
  background: transparent;
  color: var(--accent);
}

.serum-slot {
  width: 100%;
  border: 1px solid var(--border);
  background: #fafafa;
}

.serum-refs .section-title,
.serum-refs h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 900;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.serum-refs-note {
  font-size: 0.84rem;
  color: var(--body);
  line-height: 1.85;
  max-width: 62ch;
  margin-bottom: 2rem;
}

.serum-ref-group {
  border-top: 1px solid var(--border);
  padding: 1.4rem 0 0.4rem;
}

.serum-ref-group h3 {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.serum-ref-group h3 a {
  color: var(--accent);
  text-decoration: none;
}

.serum-ref-group h3 a:hover {
  text-decoration: underline;
}

.serum-ref-group .serum-ref-missing {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.serum-ref-group ol {
  margin: 0 0 1.2rem 1.15rem;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.9;
}

.serum-ref-group li {
  margin-bottom: 0.55rem;
}

.serum-ref-group a {
  color: var(--accent2, #8a3a4b);
  text-decoration: underline;
}

@media (max-width: 900px) {
  .serum-meta-grid,
  .serum-actives-grid,
  .serum-panel-grid {
    grid-template-columns: 1fr;
  }

  .serum-spec {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}