/* Ray-tracing additions. The base layout is shared with the C++ Programming course. */

.ray-lesson {
  --lesson-accent: #79dceb;
  --lesson-accent-rgb: 121, 220, 235;
}

.ray-lesson[data-lesson="04"],
.ray-lesson[data-lesson="07"],
.ray-lesson[data-lesson="11"] {
  --lesson-accent: #f4c15e;
  --lesson-accent-rgb: 244, 193, 94;
}

.ray-lesson[data-lesson="06"],
.ray-lesson[data-lesson="09"],
.ray-lesson[data-lesson="13"] {
  --lesson-accent: #82e0b9;
  --lesson-accent-rgb: 130, 224, 185;
}

.ray-lesson[data-lesson="12"],
.ray-lesson[data-lesson="14"] {
  --lesson-accent: #b4a2ff;
  --lesson-accent-rgb: 180, 162, 255;
}

.ray-lesson .course-main {
  background:
    radial-gradient(circle at 84% 12%, rgba(var(--lesson-accent-rgb), 0.12), transparent 34rem),
    linear-gradient(180deg, rgba(var(--lesson-accent-rgb), 0.025), transparent 58rem);
}

.ray-lesson .lesson-hero {
  background:
    radial-gradient(circle at 83% 54%, rgba(var(--lesson-accent-rgb), 0.22) 0 0.38rem, transparent 0.46rem),
    radial-gradient(circle at 83% 54%, transparent 0 5.2rem, rgba(var(--lesson-accent-rgb), 0.23) 5.27rem 5.35rem, transparent 5.43rem 9.8rem, rgba(245, 184, 75, 0.22) 9.87rem 9.95rem, transparent 10.03rem),
    linear-gradient(100deg, rgba(3, 16, 13, 0.99), rgba(3, 16, 13, 0.88) 43%, rgba(3, 16, 13, 0.56));
}

.ray-lesson .lesson-hero::before {
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(var(--lesson-accent-rgb), 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--lesson-accent-rgb), 0.16) 1px, transparent 1px);
  background-size: 3.4rem 3.4rem;
  mask-image: linear-gradient(90deg, #000 0%, #000 30%, transparent 84%);
}

.ray-lesson[data-art-pattern="flow"] .lesson-hero::before {
  background-image: repeating-linear-gradient(112deg, transparent 0 2.8rem, rgba(var(--lesson-accent-rgb), 0.3) 2.84rem 2.92rem, transparent 3rem 5.8rem);
  background-size: 100% 100%;
}

.ray-lesson[data-art-pattern="branch"] .lesson-hero::before {
  background-image:
    linear-gradient(35deg, transparent 48%, rgba(var(--lesson-accent-rgb), 0.35) 49%, transparent 50%),
    linear-gradient(-35deg, transparent 48%, rgba(245, 184, 75, 0.26) 49%, transparent 50%);
  background-size: 8rem 8rem;
}

.ray-lesson .lesson-hero::after {
  border-color: rgba(var(--lesson-accent-rgb), 0.34);
  box-shadow: 0 0 0 4rem rgba(var(--lesson-accent-rgb), 0.035), 0 0 0 8rem rgba(245, 184, 75, 0.018);
}

.ray-lesson .lesson-article {
  background:
    linear-gradient(135deg, rgba(var(--lesson-accent-rgb), 0.075), transparent 18rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 14rem),
    var(--paper);
}

.sidebar-continuation {
  margin: 1.1rem;
  padding: 1rem;
  border: 1px solid var(--course-line);
  border-radius: var(--radius);
  background: rgba(116, 215, 255, 0.06);
  color: var(--course-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.sidebar-continuation strong {
  color: var(--course-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lesson-list-divider {
  margin: 0.8rem 0.45rem 0.25rem;
  padding: 0.55rem 0.45rem 0.35rem;
  border-bottom: 1px solid var(--course-line);
  color: var(--course-cyan);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.vulkan-lesson {
  --lesson-accent: #b4a2ff;
  --lesson-accent-rgb: 180, 162, 255;
}

.vulkan-lesson .lesson-hero {
  background:
    radial-gradient(circle at 78% 35%, rgba(180, 162, 255, 0.13), transparent 24rem),
    linear-gradient(135deg, rgba(116, 215, 255, 0.04), transparent 56%),
    #04110f;
}

.vulkan-worked-account {
  margin: clamp(2.2rem, 5vw, 3.5rem) 0;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid #cbc4e5;
  border-top: 0.34rem solid #6558a8;
  border-radius: 0.7rem;
  background:
    linear-gradient(135deg, rgba(101, 88, 168, 0.08), transparent 22rem),
    var(--paper-raised);
  color: var(--paper-ink);
  box-shadow: 0 1.2rem 2.8rem rgba(36, 31, 56, 0.1);
}

.vulkan-account-heading {
  max-width: 66rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid #d9d3e8;
}

.vulkan-account-kicker {
  margin: 0 0 0.35rem;
  color: #594d9b;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.vulkan-account-heading h2 {
  margin: 0;
  color: var(--paper-ink);
  font-family: var(--display);
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  line-height: 1.12;
}

.vulkan-account-heading > p:last-child {
  max-width: 60rem;
  margin: 0.8rem 0 0;
  color: var(--paper-muted);
  font-size: 1.02rem;
  line-height: 1.65;
}

.vulkan-account-prose {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.15rem;
}

.vulkan-account-prose > section {
  padding: 1rem 1.05rem;
  border: 1px solid var(--paper-line);
  border-radius: 0.48rem;
  background: rgba(255, 255, 255, 0.56);
}

.vulkan-worked-account h3 {
  margin: 0 0 0.45rem;
  color: #403677;
  font-family: var(--display);
  font-size: 1.12rem;
}

.vulkan-worked-account p {
  line-height: 1.68;
}

.vulkan-account-prose p,
.vulkan-account-example p {
  margin: 0;
}

.vulkan-account-example {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-left: 0.28rem solid #6558a8;
  background: rgba(101, 88, 168, 0.075);
}

.vulkan-account-formula {
  margin-top: 0.85rem !important;
  overflow-x: auto;
}

.vulkan-account-formula code {
  display: block;
  padding: 0.7rem 0.85rem;
  border: 1px solid #cec7e2;
  border-radius: 0.4rem;
  background: #eee9f8;
  color: #33296e;
  font-size: 0.9rem;
  font-weight: 750;
  text-align: center;
  white-space: nowrap;
}

.vulkan-account-boundary {
  margin: 1rem 0 0;
  padding: 1rem 1.05rem;
  border: 1px solid #c4d4ca;
  border-left: 0.28rem solid var(--paper-green);
  border-radius: 0.42rem;
  background: rgba(11, 107, 66, 0.065);
  color: #303a34;
}

.vulkan-account-boundary strong {
  color: var(--paper-green);
}

.official-reference {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem;
  border-left: 0.24rem solid #6558a8;
  background: rgba(101, 88, 168, 0.075);
  color: var(--paper-ink);
  font-size: 0.9rem;
  line-height: 1.65;
}

.official-reference strong {
  color: #51458d;
}

.lesson-article .official-reference a {
  color: #075c39;
  text-decoration-thickness: 0.1em;
}

.learning-objectives,
.calculation,
.worked-trace,
.checkpoint,
.warning-note,
.terminology-note,
.transfer-task,
.vulkan-bridge {
  margin: 1.7rem 0;
  padding: 1.1rem 1.25rem;
  border: 1px solid rgba(var(--lesson-accent-rgb, 15, 111, 78), 0.35);
  border-left: 0.32rem solid rgb(var(--lesson-accent-rgb, 15, 111, 78));
  border-radius: 0.5rem;
  background: rgba(var(--lesson-accent-rgb, 15, 111, 78), 0.08);
}

.learning-objectives h2,
.calculation h3,
.worked-trace h3,
.checkpoint h3,
.warning-note h3,
.terminology-note h3,
.transfer-task h2,
.vulkan-bridge h2 {
  margin-top: 0;
}

.warning-note {
  border-color: rgba(176, 103, 31, 0.35);
  border-left-color: #b0671f;
  background: rgba(245, 184, 75, 0.11);
}

.terminology-note {
  border-color: rgba(77, 80, 153, 0.38);
  border-left-color: #5f5ab5;
  background: linear-gradient(135deg, rgba(95, 90, 181, 0.1), rgba(116, 215, 255, 0.045));
}

.terminology-note p:last-child {
  margin-bottom: 0;
}

.worked-answer {
  margin-top: 0.9rem;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(var(--lesson-accent-rgb, 15, 111, 78), 0.28);
  border-radius: 0.42rem;
  background: rgba(255, 255, 255, 0.52);
}

.worked-answer h4 {
  margin: 0 0 0.35rem;
  color: var(--paper-green);
  font-family: var(--display);
  font-size: 1rem;
}

.worked-answer p:last-child {
  margin-bottom: 0;
}

.transfer-task {
  border-color: rgba(11, 107, 66, 0.42);
  border-left-color: var(--paper-green);
  background: rgba(11, 107, 66, 0.08);
}

.vulkan-bridge {
  border-color: rgba(77, 80, 153, 0.38);
  border-left-color: #5f5ab5;
  background: rgba(95, 90, 181, 0.08);
}

.equation {
  overflow-x: auto;
  padding: 0.9rem 1rem;
  border-radius: 0.45rem;
  background: #e8e4d9;
  color: #1e2924;
  font-family: var(--mono);
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
}

.ray-lab {
  margin: clamp(2rem, 5vw, 3.4rem) 0;
  padding: clamp(0.8rem, 2vw, 1rem);
  border: 1px solid rgba(var(--lesson-accent-rgb), 0.52);
  border-radius: 0.75rem;
  background:
    radial-gradient(circle at 82% 0%, rgba(var(--lesson-accent-rgb), 0.12), transparent 24rem),
    #06130f;
  color: var(--course-ink);
  box-shadow: 0 1.5rem 3rem rgba(3, 16, 13, 0.25);
}

.ray-lab-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(16rem, 1.1fr);
  gap: 1rem;
  align-items: end;
  margin-bottom: 0.55rem;
}

.ray-lab .ray-lab-heading h2 {
  margin: 0;
  color: var(--course-ink);
  font-family: var(--display);
  font-size: clamp(1.35rem, 2vw, 1.75rem);
}

.ray-lab-heading > p {
  margin: 0;
  color: var(--course-soft);
  font-size: 0.84rem;
  line-height: 1.4;
}

.ray-lab-kicker {
  margin: 0 0 0.25rem;
  color: var(--lesson-accent);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.ray-lab .ray-lab-kicker {
  margin: 0 0 0.15rem;
}

.ray-lab-instruction {
  margin: 0;
  padding: 0.48rem 0.68rem;
  border: 1px solid rgba(var(--lesson-accent-rgb), 0.32);
  border-left: 0.28rem solid var(--lesson-accent);
  border-radius: 0.45rem;
  background: rgba(var(--lesson-accent-rgb), 0.08);
  color: var(--course-soft);
  font-size: 0.8rem;
  line-height: 1.4;
}

.ray-lab-instruction strong {
  color: var(--course-ink);
}

.ray-lab-instruction code {
  background: rgba(255, 255, 255, 0.08);
  color: var(--lesson-accent);
}

.ray-lab > .ray-lab-instruction {
  margin: 0;
}

.ray-lab-workspace {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 22rem));
  justify-content: center;
  gap: 0.6rem;
}

.ray-output,
.ray-diagram {
  overflow: hidden;
  border: 1px solid rgba(170, 214, 199, 0.25);
  border-radius: 0.55rem;
  background: #020806;
}

.canvas-label {
  display: flex;
  justify-content: space-between;
  gap: 0.55rem;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.38rem 0.55rem;
  border-bottom: 1px solid rgba(170, 214, 199, 0.18);
  color: var(--course-soft);
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.35;
}

.canvas-label > output,
.canvas-label > [data-diagram-label] {
  flex: 0 0 auto;
  color: var(--lesson-accent);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-align: right;
}

.canvas-label-copy {
  min-width: 0;
  display: grid;
  gap: 0.08rem;
}

.canvas-label-copy strong {
  color: var(--course-soft);
}

.canvas-label-copy small {
  color: var(--course-muted);
  font-size: 0.64rem;
  font-weight: 650;
  line-height: 1.2;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.ray-output canvas,
.ray-diagram canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #020806;
}

.ray-output canvas {
  aspect-ratio: 8 / 5;
  image-rendering: auto;
}

.ray-diagram canvas {
  aspect-ratio: 24 / 13;
}

.ray-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.45rem;
  margin-top: 0.55rem;
}

.ray-control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem 0.6rem;
  align-items: center;
  padding: 0.48rem 0.58rem;
  border: 1px solid rgba(170, 214, 199, 0.18);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.035);
}

.ray-control label {
  color: var(--course-soft);
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.35;
}

.ray-control output {
  color: var(--lesson-accent);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 700;
}

.ray-control input,
.ray-control select {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--lesson-accent);
}

.ray-control select {
  min-height: 2.1rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 0.35rem;
  background: var(--course-panel);
  color: var(--course-ink);
  font: inherit;
}

.ray-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
}

.ray-actions button {
  cursor: pointer;
}

.lab-button-secondary {
  border: 1px solid var(--course-line-strong);
  background: transparent;
  color: var(--course-ink);
}

.ray-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.ray-metrics div {
  padding: 0.68rem 0.75rem;
  border-top: 1px solid rgba(var(--lesson-accent-rgb), 0.35);
  background: rgba(255, 255, 255, 0.03);
}

.ray-metrics dt {
  color: var(--course-muted);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ray-metrics dd {
  margin: 0.18rem 0 0;
  color: var(--course-ink);
  font-family: var(--mono);
  font-size: 0.86rem;
}

.ray-lab-note,
.ray-lab-noscript {
  margin: 0;
  color: var(--course-soft);
  font-size: 0.74rem;
  line-height: 1.4;
}

.ray-lab-note code {
  background: rgba(255, 255, 255, 0.08);
  color: var(--lesson-accent);
}

.pixel-storage-lab .ray-output canvas {
  display: block;
  image-rendering: pixelated;
  cursor: crosshair;
}

.pixel-raster-frame {
  position: relative;
}

.pixel-raster-frame::after {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(198, 213, 207, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(198, 213, 207, 0.2) 1px, transparent 1px);
  background-size: 6.25% 10%;
  content: "";
  pointer-events: none;
}

.pixel-raster-key {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin: 0;
  padding: 0.42rem 0.55rem;
  color: var(--course-soft);
  font-size: 0.72rem;
}

.lesson-article .pixel-raster-key {
  margin: 0;
}

.pixel-raster-key > span {
  display: flex;
  align-items: center;
  gap: 0.42rem;
}

.pixel-key-copy {
  min-width: 0;
  display: grid;
  gap: 0.08rem;
  color: var(--course-soft);
  line-height: 1.2;
}

.pixel-key-copy strong {
  font-size: 0.67rem;
}

.pixel-raster-key code {
  background: transparent;
  color: var(--course-ink);
  font-size: 0.7rem;
}

.pixel-swatch {
  width: 0.8rem;
  height: 0.8rem;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.42);
}

.pixel-swatch-background {
  background: rgb(24, 42, 36);
}

.pixel-swatch-selected {
  background: rgb(247, 184, 75);
}

.pixel-storage-controls {
  grid-template-columns: repeat(2, minmax(11rem, 1fr));
}

.vector-controls {
  grid-template-columns: repeat(3, minmax(9rem, 1fr));
}

.vector-lab .ray-output canvas {
  display: block;
}

.pixel-storage-facts,
.vector-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
  margin: 0.55rem 0 0;
}

.pixel-storage-facts div,
.vector-facts div {
  min-width: 0;
  padding: 0.45rem 0.52rem;
  border-top: 1px solid rgba(var(--lesson-accent-rgb), 0.38);
  background: rgba(255, 255, 255, 0.035);
}

.pixel-storage-facts dt,
.vector-facts dt {
  color: var(--course-muted);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.pixel-storage-facts dd,
.vector-facts dd {
  margin: 0.12rem 0 0;
  color: var(--course-ink);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.vector-facts dd {
  font-size: clamp(0.7rem, 1.1vw, 0.8rem);
}

.vector-formulas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin: 0;
}

.vector-formulas p {
  margin: 0;
  padding: 0.48rem 0.55rem;
  border: 1px solid rgba(170, 214, 199, 0.18);
  border-radius: 0.45rem;
  background: rgba(0, 0, 0, 0.18);
  color: var(--course-soft);
  text-align: center;
}

.vector-formulas code {
  background: transparent;
  color: var(--lesson-accent);
  font-size: clamp(0.66rem, 1vw, 0.76rem);
}

.concept-lab .ray-diagram canvas {
  aspect-ratio: 8 / 5;
}

.concept-lab .ray-lab-heading {
  grid-template-columns: minmax(0, 0.9fr) minmax(16rem, 1.1fr);
  gap: 1rem;
  align-items: end;
}

.concept-lab .ray-lab-workspace {
  grid-template-columns: repeat(2, minmax(0, 22rem));
}

.ray-controls + .ray-lab-workspace,
.lab-control-strip + .ray-lab-workspace {
  margin-top: 0.55rem;
}

.focused-concept-lab .ray-lab-workspace {
  width: min(100%, 22rem);
  margin-inline: auto;
}

.focused-concept-lab .ray-diagram canvas {
  aspect-ratio: 8 / 5;
}

.concept-controls {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
}

.lab-control-strip {
  display: flex;
  gap: 0.55rem;
  align-items: stretch;
}

.lab-control-strip .ray-controls {
  flex: 1 1 auto;
}

.lab-control-strip .ray-actions {
  flex: 0 0 auto;
  align-items: stretch;
}

.lab-control-strip .ray-actions .course-button {
  min-height: 0;
  padding: 0.38rem 0.58rem;
  font-size: 0.68rem;
  line-height: 1.2;
}

.stage-03-lab .ray-output canvas {
  cursor: crosshair;
}

.concept-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.42rem;
  margin: 0.55rem 0 0;
}

.concept-facts div {
  min-width: 0;
  padding: 0.42rem 0.5rem;
  border: 1px solid rgba(var(--lesson-accent-rgb), 0.24);
  border-top-color: rgba(var(--lesson-accent-rgb), 0.52);
  border-radius: 0.42rem;
  background: rgba(255, 255, 255, 0.04);
}

.concept-facts dt {
  color: var(--course-muted);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.concept-facts dd {
  margin: 0.12rem 0 0;
  overflow-wrap: anywhere;
  color: var(--course-ink);
  font-family: var(--mono);
  font-size: clamp(0.68rem, 1vw, 0.78rem);
  font-weight: 650;
  line-height: 1.25;
}

.concept-facts-8 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.concept-formulas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 0.4rem;
  margin: 0;
}

.concept-formulas p {
  margin: 0;
  padding: 0.46rem 0.55rem;
  border: 1px solid rgba(170, 214, 199, 0.18);
  border-radius: 0.45rem;
  background: rgba(0, 0, 0, 0.18);
  color: var(--course-soft);
  text-align: center;
}

.concept-formulas code {
  background: transparent;
  color: var(--lesson-accent);
  font-size: clamp(0.68rem, 1vw, 0.78rem);
  line-height: 1.3;
}

.pixel-storage-formula {
  margin: 0;
  padding: 0.48rem 0.55rem;
  border: 1px solid rgba(170, 214, 199, 0.18);
  border-radius: 0.45rem;
  background: rgba(0, 0, 0, 0.18);
  color: var(--course-soft);
  text-align: center;
}

.pixel-storage-formula code {
  background: transparent;
  color: var(--lesson-accent);
  font-size: clamp(0.7rem, 1.2vw, 0.82rem);
}

.lab-conclusion {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(16rem, 0.85fr);
  gap: 0.5rem;
  align-items: stretch;
  margin-top: 0.5rem;
}

.lab-conclusion > .ray-lab-note {
  display: flex;
  align-items: center;
  padding: 0.45rem 0.55rem;
  border-left: 0.2rem solid rgba(var(--lesson-accent-rgb), 0.5);
  background: rgba(var(--lesson-accent-rgb), 0.06);
}

.lesson-article .lab-conclusion > .ray-lab-note,
.lesson-article .lab-conclusion > .pixel-storage-formula {
  margin: 0;
}

.vulkan-continuation {
  margin-top: clamp(3rem, 8vw, 6rem);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--course-line-strong);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(180, 162, 255, 0.12), rgba(116, 215, 255, 0.04));
}

.vulkan-continuation h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.vulkan-continuation > p:last-child {
  max-width: 64rem;
  color: var(--course-soft);
}

.glossary-entry[hidden],
.glossary-empty[hidden] {
  display: none;
}

.pagination-link-disabled {
  visibility: hidden;
}

@media (max-width: 68rem) {
  .ray-lab-workspace,
  .concept-lab .ray-lab-workspace {
    grid-template-columns: 1fr;
  }

  .ray-output,
  .ray-diagram {
    width: min(100%, 36rem);
    margin-inline: auto;
  }

  .concept-lab .ray-lab-heading {
    grid-template-columns: 1fr;
    gap: 0.55rem;
    align-items: start;
  }

  .lab-control-strip,
  .lab-conclusion {
    display: grid;
    grid-template-columns: 1fr;
  }

  .ray-diagram canvas {
    max-height: 22rem;
  }
}

@media (min-width: 68.01rem) and (max-height: 50rem) {
  .ray-lab {
    padding: 0.68rem;
  }

  .ray-lab .ray-lab-heading h2 {
    font-size: 1.5rem;
    line-height: 1.05;
  }

  .ray-lab-heading {
    margin-bottom: 0.35rem;
  }

  .ray-lab > .ray-lab-instruction {
    padding: 0.35rem 0.6rem;
    line-height: 1.3;
  }

  .ray-controls,
  .ray-actions {
    margin-top: 0.35rem;
  }

  .ray-controls + .ray-lab-workspace,
  .lab-control-strip + .ray-lab-workspace,
  .pixel-storage-facts,
  .vector-facts,
  .concept-facts,
  .lab-conclusion {
    margin-top: 0.35rem;
  }

  .canvas-label {
    min-height: 2.5rem;
    padding-block: 0.3rem;
  }

  .ray-lab-workspace,
  .concept-lab .ray-lab-workspace {
    grid-template-columns: repeat(2, minmax(0, 17.5rem));
  }

  .focused-concept-lab .ray-lab-workspace {
    width: min(100%, 17.5rem);
    grid-template-columns: minmax(0, 17.5rem);
  }

  .concept-facts-8 {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

@media (max-width: 46rem) {
  .vulkan-account-prose {
    grid-template-columns: 1fr;
  }

  .ray-lab-heading {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .ray-controls,
  .ray-metrics {
    grid-template-columns: 1fr 1fr;
  }

  .pixel-storage-facts,
  .vector-facts,
  .concept-facts {
    grid-template-columns: 1fr 1fr;
  }

  .vector-controls,
  .vector-formulas {
    grid-template-columns: 1fr;
  }

  .pixel-raster-key {
    grid-template-columns: 1fr;
  }

  .ray-actions .course-button {
    width: 100%;
  }
}

@media (max-width: 31rem) {
  .ray-controls,
  .ray-metrics,
  .pixel-storage-facts,
  .vector-facts,
  .concept-facts,
  .concept-formulas {
    grid-template-columns: 1fr;
  }
}

@media print {
  .ray-controls,
  .ray-actions {
    display: none !important;
  }

  .ray-lab {
    break-inside: avoid;
    border-color: #777;
    background: white;
    color: black;
    box-shadow: none;
  }

  .ray-lab .ray-lab-heading h2,
  .ray-lab-heading > p,
  .ray-lab-note,
  .ray-metrics dd {
    color: black;
  }

  .vulkan-worked-account {
    break-inside: avoid;
    border-color: #777;
    background: white;
    color: black;
    box-shadow: none;
  }
}