.business-contact {
  position: fixed;
  z-index: 90;
  top: 50%;
  right: 28px;
  transform: translateY(-50%);
}

.business-contact__card {
  display: block;
  width: 104px;
  max-width: calc(100vw - 32px);
  padding: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #fff;
  color: var(--color-ink);
  box-shadow: 0 8px 32px rgba(42, 35, 26, .09);
  text-align: center;
  transition: width .28s ease, padding .28s ease, box-shadow .28s ease;
}

.business-contact__card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.business-contact__qr {
  width: 100%;
  height: auto;
}

.business-contact__details {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: max-height .28s ease, margin-top .28s ease, opacity .2s ease, visibility .2s ease;
}

.business-contact__title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.business-contact__hint {
  display: block;
  margin-top: 5px;
  color: var(--color-text-muted);
  font-size: 11px;
  line-height: 1.6;
}

.business-contact.is-open .business-contact__card {
  width: 232px;
  padding: 16px;
  box-shadow: 0 16px 48px rgba(42, 35, 26, .15);
}

.business-contact.is-open .business-contact__details {
  max-height: 85px;
  margin-top: 14px;
  opacity: 1;
  visibility: visible;
}

body.menu-open .business-contact { visibility: hidden; }

@media (min-width: 1180px) {
  .case-page .business-contact { right: 282px; }
}

@media (max-width: 560px) {
  .business-contact {
    top: auto;
    right: 16px;
    bottom: calc(80px + env(safe-area-inset-bottom, 0px));
    transform: none;
  }
  .business-contact__card { width: 72px; padding: 8px; border-radius: 12px; }
  .business-contact.is-open .business-contact__card { width: 216px; padding: 14px; }
}

@media (max-height: 480px) {
  .business-contact { top: auto; bottom: 18px; transform: none; }
  .business-contact.is-open .business-contact__card { width: 180px; padding: 12px; }
  .business-contact.is-open .business-contact__details { margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .business-contact__card, .business-contact__details { transition: none; }
}