.question-visual {
  box-sizing: border-box;
  width: 100%;
  max-width: 760px;
  margin: 14px auto;
  padding: 12px;
  overflow: hidden;
  border: 1px solid #cfd8d2;
  border-radius: 8px;
  background: #fbfcfa;
  color: #17201b;
}

.question-visual-number_line svg {
  max-width: 560px;
  margin: 0 auto;
}

.question-visual svg {
  box-sizing: border-box;
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
}

.question-visual-description {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.qv-axis,
.qv-axis-arrow,
.qv-tick,
.qv-segment,
.qv-marker,
.qv-grid-line {
  fill: none;
  stroke: #2d5f55;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.qv-grid-line { stroke: #809089; stroke-width: 1.5; }
.qv-point,
.qv-geometry-point {
  fill: #fff;
  stroke: #176b5b;
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
}
.qv-cell {
  fill: #eaf1f8;
  stroke: #315f88;
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}
.qv-filled-cell {
  fill: #dcece6;
  stroke: #2d5f55;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}
.qv-label,
.qv-point-label,
.qv-cell-label,
.qv-view-label {
  fill: #17201b;
  font-family: system-ui, sans-serif;
  font-size: 18px;
  font-weight: 700;
}
.qv-point-label { font-size: 19px; }
.qv-view-label { font-size: 20px; }

.question-visual-error {
  margin: 12px 0;
  padding: 12px;
  border: 1px solid #a16a16;
  border-radius: 8px;
  background: #fff9ee;
  color: #6c470d;
  line-height: 1.55;
}

@media (max-width: 480px) {
  .question-visual {
    padding: 8px;
  }
  .qv-label,
  .qv-point-label,
  .qv-cell-label,
  .qv-view-label { font-size: 20px; }
}

@media print {
  .question-visual,
  .question-visual * {
    color: #000;
    border-color: #000;
    background: #fff;
    fill: #fff;
    stroke: #000;
  }
  .question-visual text { fill: #000; }
  .qv-point,
  .qv-geometry-point,
  .qv-cell,
  .qv-filled-cell { fill: #fff; stroke: #000; }
}