.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.academy {
  padding: 26px 0 32px;
}

.academy > .shell {
  width: min(1470px, calc(100% - 64px));
}

.academy__heading {
  padding: 0 0 18px;
}

.academy__heading h1 {
  margin: 0;
  font: 400 clamp(42px, 4.2vw, 64px)/1.08 var(--font-display);
}

.academy__heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.academy__layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 26px;
}

.mission-progress > p {
  margin: 0 0 18px;
  color: var(--brass);
  font-weight: 550;
}

.mission-progress ol {
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border);
  list-style: none;
}

.mission-progress li {
  min-height: 70px;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 9px;
  align-items: center;
  margin-left: -1px;
  border: 1px solid transparent;
  padding: 10px 12px 10px 15px;
  color: var(--muted);
}

.mission-progress li.is-current {
  border-color: var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  color: var(--text);
}

.mission-progress li.is-complete {
  color: var(--success);
}

.mission-progress li > span {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid #6b635b;
  border-radius: 50%;
  font: 500 12px/1 var(--font-data);
}

.mission-progress li.is-current > span {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.mission-progress button {
  min-height: var(--target-min);
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.mission-progress button:disabled {
  cursor: default;
}

.lesson {
  min-width: 0;
  padding: 22px 24px 18px;
  background: var(--surface);
}

.lesson h2 {
  margin: 0 0 16px;
  font: 500 clamp(25px, 2.1vw, 34px)/1.15 var(--font-heading);
  letter-spacing: -0.025em;
}

.canon-summary {
  min-height: 128px;
  display: flex;
  align-items: center;
  gap: 18px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}

.canon-thumb {
  width: 112px;
  height: 128px;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid #c8b9a4;
  border-radius: 5px;
  background: var(--cream);
}

.canon-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.canon-summary strong {
  color: var(--brass);
}

.canon-summary ul {
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  color: var(--muted);
  list-style: none;
}

.take-fieldset,
.anchor-fieldset,
.motion-fieldset {
  min-inline-size: 0;
  margin: 16px 0;
  padding: 0;
  border: 0;
}

.take-fieldset {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.take-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: #171411;
  cursor: pointer;
}

.take-card:has(input:checked) {
  border-color: var(--brass);
  box-shadow: 0 0 0 1px var(--brass);
}

.take-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 1.15 / 1;
  object-fit: contain;
  object-position: center;
  background: var(--cream);
}

.take-card__label {
  min-height: 70px;
  display: grid;
  grid-template-columns: 22px 1fr;
  grid-template-rows: auto auto;
  column-gap: 9px;
  align-content: center;
  padding: 11px 13px;
}

.take-card input {
  grid-row: 1 / 3;
  width: 18px;
  height: 18px;
  align-self: center;
  margin: 0;
  accent-color: var(--primary);
}

.take-card b {
  font-size: 16px;
}

.take-card small {
  color: var(--muted);
  line-height: 1.25;
}

.lesson-submit {
  width: 100%;
}

.lesson-hint,
.step-intro {
  color: var(--muted);
}

.lesson-hint {
  margin: 16px 4px 0;
}

.step-intro {
  max-width: 690px;
}

.anchor-fieldset,
.motion-fieldset {
  display: grid;
  gap: 10px;
}

.anchor-fieldset legend,
.motion-fieldset legend {
  margin-bottom: 13px;
  color: var(--brass);
  font-weight: 550;
}

.anchor-fieldset label,
.motion-fieldset label {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  padding: 10px 14px;
  background: #171411;
  cursor: pointer;
}

.anchor-fieldset input,
.motion-fieldset input {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  accent-color: var(--primary);
}

.lesson-feedback {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--danger);
}

.lesson-feedback.is-success {
  color: var(--success);
}

.completion-card,
.save-card {
  grid-column: 2;
}

.completion-card {
  display: flex;
  justify-content: space-between;
  padding: 16px 20px;
}

.completion-card > div {
  display: grid;
  gap: 3px;
}

.completion-card[hidden] {
  display: none;
}

.completion-card > div,
.completion-card strong {
  color: var(--success);
  font-size: 18px;
}

.completion-card span {
  color: var(--muted);
}

.save-card {
  border-top: 1px solid var(--border);
  padding: 0 2px;
}

.save-card summary {
  min-height: 48px;
  display: flex;
  align-items: center;
  color: var(--muted);
  cursor: pointer;
}

.save-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 0 14px;
}

.save-actions p {
  flex: 1 0 100%;
  min-height: 20px;
  margin: 0;
  color: var(--success);
}

@media (max-width: 900px) {
  .academy > .shell {
    width: min(100% - 32px, 1470px);
  }

  .academy__layout {
    grid-template-columns: 1fr;
  }

  .mission-progress ol {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-left: 0;
  }

  .mission-progress li {
    min-height: 64px;
    margin: 0;
    padding: 8px;
  }

  .mission-progress button {
    font-size: 13px;
  }

  .completion-card,
  .save-card {
    grid-column: 1;
  }
}

@media (max-width: 650px) {
  .academy {
    padding-top: 20px;
  }

  .academy__heading h1 {
    font-size: 42px;
  }

  .mission-progress ol {
    grid-template-columns: 1fr;
  }

  .mission-progress li {
    display: grid;
    min-height: 52px;
  }

  .lesson {
    padding: 18px 14px;
  }

  .take-fieldset {
    overflow-x: auto;
    grid-template-columns: repeat(3, 230px);
    padding-bottom: 8px;
  }

  .completion-card {
    align-items: flex-start;
    flex-direction: column;
  }
}