.polynomial-explorer { margin: 1.5rem 0 2rem; padding: 1rem; border: 1px solid #ddd; border-radius: 8px; color: #333; background: #fff; }
.polynomial-explorer [hidden] { display: none !important; }
.polynomial-explorer .poly-controls { display: grid; gap: .7rem; }
.polynomial-explorer .poly-degree-label { display: flex; justify-content: space-between; gap: .7rem; font-weight: 600; }
.polynomial-explorer .poly-degree-label output { font-weight: 400; font-variant-numeric: tabular-nums; }
.polynomial-explorer input[type="range"] { width: 100%; min-height: 30px; accent-color: #332288; cursor: pointer; }
.polynomial-explorer .poly-buttons { display: flex; flex-wrap: wrap; gap: .45rem; }
.polynomial-explorer button { padding: .3rem .65rem; border: 1px solid #aaa; border-radius: 4px; background: #fafafa; color: #222; font: inherit; font-size: .85rem; cursor: pointer; }
.polynomial-explorer button:hover { background: #eee; }
.polynomial-explorer button[aria-pressed="true"] { border-color: #332288; background: #eeebf7; box-shadow: inset 0 0 0 1px #332288; }
.polynomial-explorer :focus-visible { outline: 3px solid #332288; outline-offset: 3px; }
.polynomial-explorer .poly-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; margin-top: 1rem; }
.polynomial-explorer .poly-panel { min-width: 0; }
.polynomial-explorer .poly-panel-title { margin: 0 0 .15rem; text-align: center; font-weight: 600; font-size: 1rem; }
.polynomial-explorer .poly-metric { display: block; text-align: center; font-size: .9rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.polynomial-explorer svg { display: block; width: 100%; height: auto; overflow: hidden; font-family: "DejaVu Sans", sans-serif; font-size: 13px; }
.polynomial-explorer .poly-grid { stroke: #e5e5e5; }
.polynomial-explorer .poly-axes { fill: #333; }
.polynomial-explorer .poly-point { fill: #332288; stroke: white; stroke-width: .8; }
.polynomial-explorer .poly-fitted { fill: none; stroke: #168574; stroke-width: 3; }
.polynomial-explorer .poly-truth { fill: none; stroke: #444; stroke-width: 2; stroke-dasharray: 7 5; }
.polynomial-explorer .poly-residual { stroke: #cc6677; stroke-width: 1.2; opacity: .65; }
.polynomial-explorer .poly-offscreen { fill: #a75a00; }
.polynomial-explorer .poly-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: .3rem 1rem; margin: .3rem 0 .8rem; font-size: .8rem; }
.polynomial-explorer .poly-legend span { display: inline-flex; align-items: center; gap: .35rem; }
.polynomial-explorer .poly-legend i { display: inline-block; width: 1.2rem; border-top: 3px solid #168574; }
.polynomial-explorer .poly-legend .poly-key-point { width: .5rem; height: .5rem; border: 0; border-radius: 50%; background: #332288; }
.polynomial-explorer .poly-legend .poly-key-residual { border-color: #cc6677; border-width: 2px; }
.polynomial-explorer .poly-legend .poly-key-mean { border-color: #444; border-width: 2px; border-top-style: dashed; }
.polynomial-explorer .poly-options { display: flex; align-items: center; flex-wrap: wrap; gap: .6rem 1rem; }
.polynomial-explorer .poly-options label { display: flex; gap: .4rem; align-items: center; font-size: .85rem; }
.polynomial-explorer input[type="checkbox"] { accent-color: #332288; }
.polynomial-explorer .poly-caption { margin: .75rem 0 0; font-size: .85rem; }
.polynomial-explorer #poly-offscreen-note { color: #8b4b00; }
.polynomial-explorer .poly-screen-reader { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media (max-width: 700px) {
  .polynomial-explorer { padding: .75rem; }
  .polynomial-explorer .poly-panels { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
}
@media print {
  .polynomial-explorer .poly-controls, .polynomial-explorer .poly-options { display: none; }
  .polynomial-explorer { break-inside: avoid; }
}