.ones-visual {
  margin: 2rem 0;
  padding: 16px;
  border-block: 1px solid var(--border);
  color: var(--primary);
  font-size: 16px;
  line-height: 1.7;
  text-align: center;
}

.ones-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.ones-controls button {
  min-height: 44px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--primary);
  font-size: 14px;
  font-weight: 400;
}

.ones-controls button:hover,
.ones-controls button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.ones-controls button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.ones-controls button:disabled {
  color: var(--secondary);
  border-color: var(--border);
  cursor: default;
}

.ones-step,
.ones-detail {
  color: var(--secondary);
  font-size: 14px;
}

.ones-diagram {
  display: block;
  width: min(100%, 360px);
  height: auto;
  margin: 8px auto;
  overflow: visible;
}

.ones-diagram [hidden] {
  display: none;
}

.ones-number,
.ones-ring-label {
  fill: var(--primary);
  font-family: var(--zine-mono);
  font-size: 18px;
  font-weight: 400;
}

.ones-small {
  fill: var(--secondary);
  font-family: var(--body-serif);
  font-size: 18px;
}

.ones-line,
.ones-ring-track {
  fill: none;
  stroke: var(--secondary);
  stroke-width: 1;
}

.ones-ring-node circle {
  fill: var(--secondary);
}

.ones-ring-node.is-current circle,
.ones-fold-point circle,
.ones-cursor circle {
  fill: var(--accent);
}

.ones-ring-node.is-current .ones-ring-label {
  fill: var(--accent);
  font-weight: 500;
}

.ones-fold-point,
.ones-cursor {
  transition: transform 240ms ease;
}

.ones-trace {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
}

.ones-status {
  margin-top: 8px;
  font-size: 16px;
  font-weight: 500;
}

.ones-math {
  margin-top: 4px;
  font-family: var(--zine-mono);
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 600px) {
  .ones-math {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ones-fold-point,
  .ones-cursor {
    transition: none;
  }
}