.layer-lesson {
  background: #f8faf8;
  padding: 28px;
  margin: 0 0 40px;
  color: #0b2832;
}
.layer-lesson [hidden] {
  display: none !important;
}
.lesson-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
}
.lesson-heading h3 {
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
}
.lesson-heading p {
  font-size: 16px;
  margin: 0;
}
.layer-lesson button {
  min-height: 44px;
  border: 1px solid #c4d3ca;
  border-radius: 4px;
  background: #fff;
  color: inherit;
  padding: 8px 14px;
  font: inherit;
  font-size: 14px;
}
.layer-lesson button:hover {
  border-color: #568574;
}
.lesson-input-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  margin-top: 24px;
}
#lesson-inputs {
  border: 0;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 8px;
}
#lesson-inputs legend {
  font-size: 13px;
  color: #526b60;
  margin-bottom: 8px;
  padding: 0;
}
#lesson-inputs label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border: 1px solid #cad8ce;
  background: #fff;
  cursor: pointer;
  font-size: 15px;
}
#lesson-inputs label:has(input:checked) {
  background: #e4eee6;
  border-color: #749a86;
}
#lesson-inputs input {
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: #08685f;
  flex-shrink: 0;
}
#lesson-inputs svg {
  display: block;
  flex-shrink: 0;
}
#lesson-context {
  font-size: 14px;
  line-height: 1.5;
  max-width: 64ch;
  margin: 0;
}
.lesson-comparison {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 26px;
  gap: 0;
}
.lesson-method {
  min-width: 0;
  padding: 0 16px;
}
.lesson-method:first-child {
  padding-left: 16px;
}
.lesson-method:last-child {
  padding-right: 16px;
}
.lesson-method + .lesson-method {
  border-left: 1px solid #d7e2da;
}
.lesson-method h4 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
  letter-spacing: -0.02em;
}
.lesson-method-subtitle {
  margin: 0 0 16px;
  font-size: 13px;
  color: #526b60;
}
.lesson-wiring {
  display: block;
  width: 100%;
  max-width: 360px;
  margin-inline: auto;
  height: auto;
  overflow: visible;
}
.lesson-wiring text {
  fill: #203a32;
  font-family: "Albert Sans", Arial, sans-serif;
}
.lesson-wire {
  fill: none;
  stroke: #83998c;
  stroke-width: 1.2;
}
.lesson-wire.depth {
  stroke-width: 1;
}
.lesson-wire.unused {
  stroke: #c9d6cd;
  opacity: 0.6;
}
.lesson-wire.selected {
  stroke: #08685f;
  stroke-width: 1.8;
}
.lesson-wire.feature {
  stroke: #81958a;
  stroke-width: 1;
}
.lesson-wire.choice {
  stroke: #08685f;
  stroke-width: 1.8;
  stroke-dasharray: 5 4;
}
.lesson-pulse {
  fill: none;
  stroke: #0b2832;
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-dasharray: 1 11;
  opacity: 0;
}
.layer-lesson.is-tracing .lesson-pulse {
  opacity: 1;
  animation: lesson-flow 1s linear infinite;
}
.lesson-node {
  fill: #f1f5f1;
  stroke: #bccfc0;
  stroke-width: 1;
}
.lesson-score {
  fill: #f1f5f1;
  stroke: #bccfc0;
  stroke-width: 1;
}
.lesson-node.chosen,
.lesson-score.chosen {
  fill: #dfede2;
  stroke: #5f907a;
  stroke-width: 1.4;
}
.lesson-box {
  fill: #fff;
  stroke: #93ad9a;
  stroke-width: 1.3;
}
.lesson-box.router {
  fill: #dceae2;
  stroke: #08685f;
}
.lesson-box.fusion {
  fill: #e8f0ea;
  stroke: #08685f;
  stroke-width: 1.8;
}
.lesson-method-copy {
  font-size: 14px;
  line-height: 1.5;
  margin: 10px 0 8px;
}
.lesson-selected {
  font-size: 13px;
  line-height: 1.5;
  margin: 0;
  font-weight: 600;
}
.lesson-finding {
  font-size: 15px;
  font-weight: 500;
  margin: 24px 0 10px;
  padding-top: 20px;
  border-top: 1px solid #d7e2da;
}
.lesson-key {
  font-size: 13px;
  line-height: 1.5;
  color: #526b60;
  margin: 0;
}

.lesson-disclosure {
  font-size: 13px;
  line-height: 1.5;
  color: #526b60;
  margin: 24px 0 0;
  max-width: 110ch;
}
.lesson-disclosure a {
  white-space: nowrap;
}
.lesson-mobile-views {
  display: none;
}
@keyframes lesson-flow {
  to {
    stroke-dashoffset: -24;
  }
}
@media (max-width: 1100px) {
  .layer-lesson {
    padding: 24px 20px;
  }
  .lesson-method {
    padding-inline: 12px;
  }
  .lesson-method h4 {
    font-size: 18px;
  }
  .lesson-input-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}
@media (max-width: 1200px) {
  .layer-lesson.has-lesson-js .lesson-mobile-views {
    display: flex;
    gap: 6px;
    margin-top: 24px;
  }
  .lesson-mobile-views button {
    flex: 1;
    padding-inline: 6px;
  }
  .lesson-mobile-views button[aria-pressed="true"] {
    background: #e2ece4;
    border-color: #70927c;
  }
  .lesson-comparison {
    display: block;
    margin-top: 24px;
  }
  .lesson-method,
  .lesson-method:first-child,
  .lesson-method:last-child {
    display: block;
    padding: 0;
    max-width: 480px;
    margin: auto;
  }
  .lesson-method + .lesson-method {
    border: 0;
  }
  .layer-lesson.has-lesson-js .lesson-method {
    display: none;
  }
  .layer-lesson:not(.has-lesson-js) .lesson-method + .lesson-method {
    margin-top: 32px;
  }
  .layer-lesson.has-lesson-js[data-view="final"] [data-lesson-method="final"],
  .layer-lesson.has-lesson-js[data-view="fixed"] [data-lesson-method="fixed"],
  .layer-lesson.has-lesson-js[data-view="dynamic"] [data-lesson-method="dynamic"] {
    display: block;
  }
  .lesson-method h4 {
    font-size: 22px;
  }
  .lesson-method-subtitle {
    font-size: 14px;
  }
}
@media (max-width: 600px) {
  .layer-lesson {
    padding: 22px 16px;
    margin-inline: -16px;
  }
  .lesson-heading {
    display: block;
  }
  .lesson-heading h3 {
    font-size: 24px;
  }
  .lesson-heading button {
    margin-top: 16px;
  }
  #lesson-inputs {
    width: 100%;
  }
  #lesson-inputs label {
    flex: 1;
    gap: 6px;
    padding: 6px;
    font-size: 14px;
  }
  .lesson-method-copy {
    font-size: 15px;
  }
  .lesson-finding {
    font-size: 14px;
  }

  .lesson-disclosure a {
    white-space: normal;
  }
}
@media (prefers-reduced-motion: reduce) {
  .layer-lesson.is-tracing .lesson-pulse {
    animation: none;
    opacity: 0;
  }
}