.spirograph { padding-block: 24px 48px; }
.spirograph .breadcrumb { margin-bottom: 16px; }
.spirograph h1 { margin-bottom: 10px; }
.spirograph .intro { color: var(--muted); margin-bottom: 16px; }
.spiro-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 36px; align-items: start; }
#spiro-controls fieldset { padding: 0; margin: 0; border: 0; min-width: 0; }
.control { margin-bottom: 6px; }
.control label { display: flex; justify-content: space-between; gap: 12px; font-size: .85rem; line-height: 1.35; font-weight: 600; }
.control output { font-weight: 400; font-variant-numeric: tabular-nums; }
.control select { display: block; width: 100%; padding: 8px 10px; margin-top: 6px; min-height: 44px; font: inherit; color: var(--ink); background: white; border: 1px solid var(--border); border-radius: 8px; }
.control input[type="range"] { display: block; width: 100%; min-height: 30px; margin: 4px 0 0; accent-color: var(--ink); }
.control small { display: block; color: var(--muted); font-size: .7rem; line-height: 1.3; }
.color-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-block: 12px; font-size: .85rem; font-weight: 600; }
.color-row input { width: 64px; height: 36px; padding: 3px; background: white; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; }
.check-row { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-block: 8px; }
.check-row label { display: flex; gap: 6px; align-items: center; min-height: 36px; font-size: .8rem; }
.check-row input { width: 16px; height: 16px; accent-color: var(--ink); }
.drawing-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 12px; }
.drawing-actions .button { padding: 10px 8px; }
.control-note { font-size: .75rem; color: var(--muted); line-height: 1.45; margin: 12px 0 0; }
.drawing { min-width: 0; width: 100%; max-width: 520px; justify-self: center; }
.canvas-frame { position: relative; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; aspect-ratio: 1; background: white; }
.canvas-frame canvas { display: block; width: 100%; height: 100%; }
#circle-canvas { position: absolute; inset: 0; pointer-events: none; }
#spiro-status { color: var(--muted); font-size: .8rem; margin: 12px 0 0; min-height: 2.5em; }
.tool-guidance { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--border); }
.tool-guidance summary { padding-block: 8px; cursor: pointer; }
.tool-guidance > div { max-width: 800px; margin-top: 16px; color: var(--muted); }
@media (max-width: 760px) {
  .spiro-layout { grid-template-columns: 1fr; gap: 24px; }
  .drawing { grid-row: 1; max-width: 470px; }
  #spiro-controls fieldset { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
  .check-row, .drawing-actions, .control-note { grid-column: 1 / -1; }
  .color-row { align-self: start; margin-top: 0; }
}
@media (max-width: 400px) {
  #spiro-controls fieldset { grid-template-columns: 1fr; }
  .spirograph h1 { font-size: 1.8rem; }
}