.suzushinlab-app-wrapper {
  max-width: 560px;
  margin: 0 auto;
}

.suzushinlab-app-howto {
  margin: 0 0 16px;
  padding: 14px 18px;
  border: 1px solid #e4e7f2;
  border-radius: 12px;
  background: #ffffff;
  font-size: 14px;
  color: #374151;
}

.suzushinlab-app-howto summary {
  cursor: pointer;
  font-weight: 700;
  color: #1e293b;
  list-style: none;
}

.suzushinlab-app-howto summary::-webkit-details-marker {
  display: none;
}

.suzushinlab-app-howto summary::before {
  content: "▶";
  display: inline-block;
  margin-right: 6px;
  font-size: 11px;
  color: #6366f1;
  transition: transform 0.2s ease;
}

.suzushinlab-app-howto[open] summary::before {
  transform: rotate(90deg);
}

.suzushinlab-app-howto ol {
  margin: 10px 0 0;
  padding-left: 20px;
  line-height: 1.7;
}

.suzushinlab-app-override {
  display: flex;
  justify-content: center;
  margin: 24px 0;
  max-width: 100%;
  overflow-x: auto;
}

.suzushinlab-app-override canvas {
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(30, 41, 59, 0.14);
}

/* Studio tabletop: restrained navy, teal, and warm highlights. */
.suzushinlab-app-wrapper { max-width: 560px; }
.suzushinlab-app-howto { background: var(--surface, #f4f7f9); border-color: var(--line, #dce5e9); color: var(--ink, #263a51); border-radius: 18px; }
.suzushinlab-app-howto summary { color: inherit; }
.suzushinlab-app-howto summary::before { color: #168b8b; }
.suzushinlab-app-override { overflow: hidden; border: 1px solid #30445b; border-radius: 22px; background: #101c2d; box-shadow: 0 20px 50px #08132326; }
.suzushinlab-app-override canvas { display: block; max-width: 100%; border-radius: 20px; box-shadow: none; }

.suzushinlab-app-override { aspect-ratio: 500 / 630; width: 100%; }