/* Chapter 4: Projections and Transformations */

.tf__canvas-wrap {
  position: relative;
}

.tf__canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: rgba(207, 185, 125, 0.06);
  touch-action: none;
}

.tf__canvas--drag {
  cursor: grab;
}

.tf__canvas--drag:active {
  cursor: grabbing;
}

.tf__canvas--pixels {
  max-width: 384px;
  margin: 0 auto;
  image-rendering: pixelated;
}

.tf__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 1rem;
  align-items: start;
}

.tf__side {
  display: grid;
  gap: 0.8rem;
}

.tp__class {
  padding: 0.6rem 0.8rem;
  border-radius: 12px;
  background: #343607;
  color: #f7df91;
  font-family: "Nunito Sans", sans-serif;
  font-weight: 800;
  line-height: 1.25;
}

.tp__class span {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.78rem;
  font-weight: 600;
  opacity: 0.8;
}

.tp__props {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
}

.tp__props li {
  padding: 0.15rem 0;
}

.tp__props li.ok {
  color: #2f8f5b;
  font-weight: 600;
}

.tp__props li.no {
  opacity: 0.55;
  text-decoration: line-through;
}

.tp__matrix {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow-x: auto;
}

.tp__mlabel {
  font-family: "Nunito Sans", sans-serif;
  font-weight: 800;
}

.mat {
  display: inline-block;
  padding: 0.2rem 0.45rem;
  border-left: 2px solid currentColor;
  border-right: 2px solid currentColor;
  border-radius: 6px;
}

.mat__grid {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 0.15rem 0.6rem;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.85rem;
  text-align: right;
}

.mat__cell {
  padding: 0.05rem 0.25rem;
  border-radius: 4px;
}

.mat__cell.lin { background: rgba(47, 143, 91, 0.16); }
.mat__cell.trn { background: rgba(207, 185, 125, 0.32); }
.mat__cell.prj { background: rgba(194, 70, 58, 0.18); }

.tf__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  opacity: 0.85;
}

.tf__legend span::before {
  display: inline-block;
  width: 0.8em;
  height: 0.8em;
  margin-right: 0.35em;
  border-radius: 3px;
  vertical-align: -0.05em;
  content: "";
}

.tf__legend .lin::before { background: rgba(47, 143, 91, 0.45); }
.tf__legend .trn::before { background: rgba(207, 185, 125, 0.75); }
.tf__legend .prj::before { background: rgba(194, 70, 58, 0.45); }

/* Homogeneous coordinates drawing */
.hc__axis { stroke: currentColor; stroke-opacity: 0.4; stroke-width: 1.5; }
.hc__plane { stroke: #cfb97d; stroke-width: 3; }
.hc__ray { stroke: #3b6fb6; stroke-width: 2; stroke-dasharray: 6 5; }
.hc__point { fill: #3b6fb6; }
.hc__image { fill: #cfb97d; stroke: #fff; stroke-width: 2; }
.hc__label { fill: currentColor; font-family: "Nunito Sans", sans-serif; font-size: 14px; font-weight: 700; }
.hc__label--gold { fill: #b39a52; }

/* RANSAC legend */
.leg::before {
  display: inline-block;
  width: 1.4em;
  height: 3px;
  margin: 0 0.35em 0.2em 0;
  vertical-align: middle;
  content: "";
}

.leg { margin-right: 0.9rem; font-size: 0.85rem; }
.leg--green::before { background: #2f8f5b; }
.leg--red::before { background: #c2463a; }
.leg--gold::before { background: #cfb97d; }

/* Panorama */
.pano__inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.pano__inputs img,
.pano__out,
.pano__matches {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
}

.pano__inputs figure,
.pano__result figure {
  margin: 0;
}

.pano__inputs figcaption,
.pano__result figcaption {
  margin-top: 0.25rem;
  font-size: 0.82rem;
  opacity: 0.7;
  text-align: center;
}

.pano__result {
  display: grid;
  gap: 0.8rem;
  margin-top: 0.8rem;
}

@media (max-width: 760px) {
  .tf__layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .pano__inputs {
    grid-template-columns: 1fr;
  }
}

/* The transformation table scrolls sideways on narrow screens. */
.tf__table {
  overflow-x: auto;
}

.tf__table table {
  min-width: 520px;
}