.fourier-plot-wrap {
  max-width: 760px;
  margin: 1.5em auto;
}

.fourier-plot-canvas {
  display: block;
  width: 100%;
  height: auto;
  max-width: 760px;
  border: 1px solid #777;
  border-radius: 6px;
  background: #f7f7f7;
}

.fourier-plot-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
  padding: 14px 16px;
  border: 1px solid #777;
  border-radius: 6px;
  background: #e9e9e9;
}
.fourier-plot-label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #222;
  font-size: 0.95em;
  font-weight: bold;
}
.fourier-plot-input {
  box-sizing: border-box;
  display: block;
  width: 6.5em;
  margin-top: 0;
  padding: 7px 8px;
  border: 1px solid #888;
  border-radius: 4px;
  color: #222;
  background: #fff;
  font: inherit;
}

/* Keep the options anchored to the control using an in-page picker. */
@supports (appearance: base-select) {
  .fourier-plot-input,
  .fourier-plot-input::picker(select) {
    appearance: base-select;
  }

  .fourier-plot-input {
    display: flex;
  }

  .fourier-plot-input::picker(select) {
    inset: auto;
    top: anchor(bottom);
    left: anchor(left);
    margin: 4px 0 0;
    border: 1px solid #888;
    border-radius: 4px;
  }
}

@media (max-width: 520px) {
  .fourier-plot-controls { align-items: flex-start; flex-direction: column; }
}