body {
  margin: 1.2rem;
  font-family: sans-serif;
  background: #fafafa;
  color: #222;
}

h1 {
  margin: 0 0 0.8rem;
  font-size: 1.5rem;
  font-weight: 600;
}

#ctrl {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 0.8rem;
}

label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

select,
input[type="number"] {
  padding: 4px 6px;
  border: 1px solid #bbb;
  border-radius: 3px;
  background: #fff;
  font: inherit;
}

input[type="number"] {
  width: 6rem;
}

.btn {
  padding: 4px 10px;
  background: #1665c1;
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font: inherit;
}

.btn:hover {
  background: #0d4c95;
}

#status {
  margin-bottom: 0.8rem;
  color: #444;
}

#wrap {
  display: none;
  max-width: 100%;
  overflow: auto;
  margin-bottom: 0.8rem;
}

canvas {
  display: block;
  border: 1px solid #555;
  background: #fff;
}

#out {
  margin: 0;
  white-space: pre-wrap;
  font-family: monospace;
  line-height: 1.45;
}

#tooltip {
  position: absolute;
  display: none;
  z-index: 10;
  pointer-events: none;
  padding: 5px 8px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.82);
  color: #fff;
  font-size: 12px;
}

details {
  margin-top: 1.2rem;
}

summary {
  cursor: pointer;
  color: #333;
}

.instructions {
  margin-top: 0.8rem;
  max-width: 860px;
  line-height: 1.55;
}

.instructions p {
  margin: 0 0 0.8rem;
}

.instructions ul {
  margin: 0 0 0.8rem;
  padding-left: 1.4rem;
}

.instructions code {
  background: #efefef;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}

.genome-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0.8rem;
}

.block-title {
  margin-bottom: 0.4rem;
  color: #333;
}

pre {
  margin: 0;
  padding: 0.6rem;
  border: 1px solid #ddd;
  background: #fff;
  overflow: auto;
}

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