.putter-brand-groups {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.putter-brand-group {
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  background: rgba(255,255,255,.025);
  overflow: hidden;
}

.putter-brand-group summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  font-weight: 700;
  letter-spacing: .01em;
  user-select: none;
}

.putter-brand-group summary::-webkit-details-marker {
  display: none;
}

.putter-brand-group summary::after {
  content: '+';
  font-size: 1.25rem;
  opacity: .8;
}

.putter-brand-group[open] summary::after {
  content: '–';
}

.putter-brand-count {
  margin-left: auto;
  margin-right: 8px;
  font-size: .85rem;
  font-weight: 600;
  opacity: .65;
}

.putter-brand-content {
  padding: 0 16px 16px;
}

@media (max-width: 640px) {
  .putter-brand-group summary {
    padding: 14px 15px;
  }

  .putter-brand-content {
    padding: 0 12px 12px;
  }
}