/* 공통 풀스크린 페이지 상단 헤더 — 고객관리 / 장부 / 노트 */

.customer-header,
.listing-header,
.guide-topbar {
  flex-shrink: 0;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  color: #0f172a;
  border-bottom: 1px solid #e2e8f0;
  min-height: 48px;
  box-sizing: border-box;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}

.customer-header__back,
.listing-header__back,
.guide-topbar__back {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: #0f172a;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.customer-header__back:hover,
.listing-header__back:hover,
.guide-topbar__back:hover {
  background: #f1f5f9;
  color: #2563eb;
}

.customer-header__title,
.listing-header__title,
.guide-topbar__title {
  flex: 0 0 auto;
  margin: 0;
  font-family: inherit;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.25;
  color: #0f172a;
  white-space: nowrap;
  letter-spacing: -0.03em;
}

@media (max-width: 900px) {
  .customer-header,
  .listing-header,
  .guide-topbar {
    padding: 8px 12px;
    gap: 8px;
    min-height: 48px;
  }

  .customer-header__back,
  .listing-header__back,
  .guide-topbar__back {
    width: 34px;
    height: 34px;
    font-size: 18px;
  }

  .customer-header__title,
  .listing-header__title,
  .guide-topbar__title {
    font-size: 16px;
    font-weight: 800;
    line-height: 1.25;
  }
}