.demo-guide {
  margin-top: 14px;
  border-radius: 20px;
  border: 1px solid rgba(23, 49, 59, 0.12);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 12px 28px rgba(23, 49, 59, 0.06);
  overflow: hidden;
}

.demo-guide summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  color: #17313b;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.demo-guide summary::-webkit-details-marker {
  display: none;
}

.demo-guide summary::before {
  content: "30 sn";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.1rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: rgba(13, 110, 110, 0.1);
  color: #0d6e6e;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.demo-guide summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.1rem;
  color: rgba(23, 49, 59, 0.7);
}

.demo-guide[open] summary::after {
  content: "−";
}

.demo-guide-body {
  padding: 0 16px 16px;
}

.demo-guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.demo-guide-item {
  padding: 12px 13px;
  border-radius: 16px;
  border: 1px solid rgba(23, 49, 59, 0.08);
  background: linear-gradient(180deg, #fffefb, #f7f1e6);
}

.demo-guide-item strong {
  display: block;
  margin-bottom: 0.35rem;
  color: #17313b;
}

.demo-guide-item span {
  display: block;
  line-height: 1.55;
  color: rgba(23, 49, 59, 0.84);
}

@media (max-width: 900px) {
  .demo-guide-grid {
    grid-template-columns: 1fr;
  }
}