/* Interactive figures of the note "Basic geometry: a comprehensive viewpoint". */

.geo-fig {
  margin: 1.2rem 0 1.6rem;
  border: 1px solid #e4e1da;
  border-radius: 10px;
  background: #fbfaf7;
  padding: 0.6rem 0.7rem 0.5rem;
}

.geo-boards {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: minmax(0, 1fr);
}
.geo-boards > div { min-width: 0; }
@media (min-width: 640px) {
  .geo-boards.cols-2,
  .geo-boards.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.geo-board,
.geo-3d {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  background: #ffffff;
  border: 1px solid #ece9e2;
  border-radius: 8px;
  overflow: hidden;
  touch-action: none;
}
.geo-board-title {
  font-size: 0.82rem;
  color: #5d6470;
  margin: 0 0 0.2rem 0.15rem;
}

/* JSXGraph navigation bar: small and unobtrusive */
.geo-board .JXG_navigation { font-size: 13px; opacity: 0.75; }

.geo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
}
.geo-controls label { display: inline-flex; align-items: center; gap: 0.45rem; }
.geo-controls input[type="range"] { width: 9.5rem; accent-color: #1d4ed8; }
.geo-controls output { font-variant-numeric: tabular-nums; min-width: 3.2rem; color: #1c1f26; }
.geo-btn {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.15rem 0.65rem;
  border: 1px solid #cfd5df;
  border-radius: 6px;
  background: #ffffff;
  color: #1c1f26;
  cursor: pointer;
}
.geo-btn:hover { border-color: #1d4ed8; color: #1d4ed8; }
.geo-btn.active { background: #1d4ed8; border-color: #1d4ed8; color: #ffffff; }

.geo-readout {
  margin-top: 0.45rem;
  font-size: 0.92rem;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
  color: #1c1f26;
}
.geo-readout .ok { color: #15803d; font-weight: 600; }
.geo-readout .bad { color: #b91c1c; font-weight: 600; }
.geo-readout .a { color: #ea580c; }
.geo-readout .b { color: #15803d; }
.geo-readout .c { color: #7c3aed; }
.geo-readout .d { color: #be123c; }
.geo-readout .step { color: #5d6470; }

.geo-hint {
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: #5d6470;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.8rem;
  align-items: center;
}
.geo-hint .geo-btn { font-size: 0.75rem; padding: 0.05rem 0.5rem; }

/* 3D figures */
.geo-3d canvas { display: block; width: 100%; height: 100%; cursor: grab; }
.geo-3d canvas:active { cursor: grabbing; }
.geo-3d .lbl {
  position: absolute;
  transform: translate(-50%, -50%);
  font: 600 14px/1 "Source Serif 4", Georgia, serif;
  color: #1c1f26;
  pointer-events: none;
  white-space: nowrap;
  text-shadow: 0 0 3px #ffffff, 0 0 3px #ffffff;
}
.geo-3d .zoom {
  position: absolute;
  right: 6px;
  bottom: 6px;
  display: flex;
  gap: 4px;
}
.geo-3d .zoom button {
  width: 26px;
  height: 26px;
  border: 1px solid #cfd5df;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  color: #1c1f26;
}

.geo-nojs { font-size: 0.85rem; color: #5d6470; }