.os-lessons-page {
  --lessons-accent: #9a6e14;
  max-width: 900px;
  margin: 0 auto;
  padding: 0.25rem 0 3rem;
}

.os-lessons-intro {
  margin: 0 0 1.25rem;
}

.os-lessons-intro > p {
  max-width: 620px;
  margin: 0;
  color: var(--ifm-color-emphasis-700);
  line-height: 1.8;
}

.os-lessons-intro ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: flex-start;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
}

.os-lessons-intro li {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  padding: 0.3rem 0.58rem;
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 999px;
  background: var(--ifm-color-emphasis-100);
  color: var(--ifm-color-emphasis-700);
  font-size: 0.84rem;
  white-space: nowrap;
}

.os-lessons-progressCard {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, auto) auto;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.8rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(154, 110, 20, 0.32);
  border-radius: 16px;
  background: linear-gradient(105deg, rgba(154, 110, 20, 0.07), var(--ifm-background-surface-color) 55%);
  box-shadow: 0 8px 24px rgba(30, 21, 34, 0.06);
}

.os-lessons-progressMain {
  min-width: 0;
}

.os-lessons-progressHeading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.os-lessons-progressHeading strong {
  color: var(--ifm-color-content);
  font-size: 1rem;
}

.os-lessons-progressHeading span {
  color: var(--lessons-accent);
  font-size: 0.875rem;
  font-weight: 800;
}

.os-lessons-progressTrack {
  height: 5px;
  margin-top: 0.55rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--ifm-color-emphasis-200);
}

.os-lessons-progressTrack span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--lessons-accent);
  transition: width 240ms ease;
}

.os-lessons-progressMain p {
  margin: 0.42rem 0 0;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.875rem;
}

.os-lessons-nextLesson {
  display: grid;
  min-width: 0;
  gap: 0.15rem;
  padding-left: 1rem;
  border-left: 1px solid var(--ifm-color-emphasis-200);
}

.os-lessons-nextLesson span {
  color: var(--ifm-color-emphasis-600);
  font-size: 0.82rem;
  font-weight: 700;
}

.os-lessons-nextLesson strong {
  min-width: 0;
  overflow: hidden;
  color: var(--ifm-color-content);
  font-size: 0.9rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.os-lessons-primaryButton {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  justify-content: center;
  min-height: 40px;
  padding: 0.58rem 0.78rem;
  border: 1px solid var(--lessons-accent);
  border-radius: 10px;
  background: var(--lessons-accent);
  color: #fff !important;
  font-size: 0.875rem;
  font-weight: 800;
  text-decoration: none !important;
  white-space: nowrap;
}

.os-lessons-primaryButton:hover {
  filter: brightness(1.08);
}

.os-lessons-guide {
  margin-bottom: 2.5rem;
  overflow: hidden;
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 13px;
  background: var(--ifm-background-surface-color);
}

.os-lessons-guideSummary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.78rem 1rem;
  cursor: pointer;
  list-style: none;
  color: var(--lessons-accent);
}

.os-lessons-guideSummary::-webkit-details-marker {
  display: none;
}

.os-lessons-guideSummary > span {
  display: flex;
  min-width: 0;
  gap: 0.5rem;
  align-items: baseline;
}

.os-lessons-guideSummary strong {
  color: var(--ifm-color-content);
  font-size: 0.95rem;
  white-space: nowrap;
}

.os-lessons-guideSummary small {
  min-width: 0;
  overflow: hidden;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.85rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.os-lessons-guideChevron {
  color: var(--ifm-color-emphasis-600);
  transition: transform 160ms ease;
}

.os-lessons-guide[open] .os-lessons-guideChevron {
  transform: rotate(180deg);
}

.os-lessons-guideGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid var(--ifm-color-emphasis-200);
  background: var(--ifm-color-emphasis-200);
}

.os-lessons-guideGrid article {
  padding: 1rem;
  background: var(--ifm-background-surface-color);
}

.os-lessons-guideGrid article > span {
  color: var(--lessons-accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.os-lessons-guideGrid h3 {
  margin: 0.32rem 0 0.25rem;
  font-size: 1rem;
}

.os-lessons-guideGrid p {
  margin: 0;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.875rem;
  line-height: 1.65;
}

.os-lessons-pathHeader {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.os-lessons-pathHeader h2,
.os-lessons-moreSection h2 {
  margin: 0;
  font-size: 1.35rem;
}

.os-lessons-pathHeader p {
  margin: 0;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.9rem;
}

.os-lessons-phaseList {
  display: grid;
  gap: 1rem;
}

.os-lessons-phase {
  overflow: hidden;
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 16px;
  background: var(--ifm-background-surface-color);
}

.os-lessons-phaseActive {
  border-color: rgba(154, 110, 20, 0.42);
}

.os-lessons-phaseHeader {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--ifm-color-emphasis-200);
  background: rgba(154, 110, 20, 0.045);
}

.os-lessons-phaseNumber {
  color: rgba(154, 110, 20, 0.35);
  font-family: var(--ifm-heading-font-family);
  font-size: 1.55rem;
  font-weight: 800;
}

.os-lessons-phaseHeader p {
  display: flex;
  gap: 0.42rem;
  align-items: center;
  margin: 0;
  color: var(--lessons-accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.os-lessons-phaseHeader p small {
  padding: 0.1rem 0.35rem;
  border-radius: 999px;
  background: rgba(154, 110, 20, 0.11);
  font-size: 0.78rem;
  letter-spacing: 0;
}

.os-lessons-phaseHeader h2 {
  margin: 0.12rem 0;
  font-size: 1.15rem;
}

.os-lessons-phaseHeader div > span {
  display: block;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.85rem;
}

.os-lessons-phaseHeader > strong {
  color: var(--ifm-color-emphasis-700);
  font-size: 0.82rem;
  white-space: nowrap;
}

.os-lessons-lessonGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ifm-color-emphasis-200);
}

.os-lessons-lessonCard {
  display: flex;
  min-width: 0;
  min-height: 126px;
  flex-direction: column;
  padding: 0.9rem 1rem;
  background: var(--ifm-background-surface-color);
  color: var(--ifm-color-content) !important;
  text-decoration: none !important;
  transition: background 160ms ease, box-shadow 160ms ease;
}

.os-lessons-lessonCard:hover {
  position: relative;
  z-index: 1;
  background: var(--ifm-color-emphasis-100);
  box-shadow: inset 3px 0 var(--lessons-accent);
}

.os-lessons-lessonNext {
  background: rgba(154, 110, 20, 0.07);
  box-shadow: inset 3px 0 var(--lessons-accent);
}

.os-lessons-lessonCompleted {
  background: rgba(42, 124, 70, 0.045);
}

.os-lessons-lessonTopline,
.os-lessons-lessonFooter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}

.os-lessons-lessonTopline > span {
  color: var(--lessons-accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.os-lessons-lessonTopline small {
  display: inline-flex;
  gap: 0.22rem;
  align-items: center;
  color: var(--ifm-color-emphasis-600);
  font-size: 0.8rem;
}

.os-lessons-lessonCompleted .os-lessons-lessonTopline small {
  color: #287a46;
}

.os-lessons-lessonCard h3 {
  margin: 0.7rem 0 0.65rem;
  font-size: 0.98rem;
  line-height: 1.45;
}

.os-lessons-lessonFooter {
  margin-top: auto;
  color: var(--ifm-color-emphasis-700);
  font-size: 0.82rem;
  font-weight: 700;
}

.os-lessons-lessonFooter svg {
  color: var(--lessons-accent);
}

.os-lessons-moreSection {
  margin-top: 2.5rem;
}

.os-lessons-moreGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 0.8rem;
}

.os-lessons-moreCard {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  min-height: 66px;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 11px;
  background: var(--ifm-background-surface-color);
  color: var(--ifm-color-content) !important;
  text-decoration: none !important;
}

.os-lessons-moreCard > svg:first-child {
  color: var(--lessons-accent);
}

.os-lessons-moreCard > span {
  display: grid;
  min-width: 0;
}

.os-lessons-moreCard small {
  color: var(--ifm-color-emphasis-600);
  font-size: 0.82rem;
}

.os-lessons-moreCard strong {
  overflow: hidden;
  font-size: 0.88rem;
  line-height: 1.4;
  text-overflow: ellipsis;
}

.os-lessons-moreCard > svg:last-child {
  color: var(--ifm-color-emphasis-600);
}

.os-lessons-primaryButton:focus-visible,
.os-lessons-guideSummary:focus-visible,
.os-lessons-lessonCard:focus-visible,
.os-lessons-moreCard:focus-visible {
  outline: 3px solid rgba(76, 122, 190, 0.7);
  outline-offset: 2px;
}

[data-theme='dark'] .os-lessons-page {
  --lessons-accent: #e1bf54;
}

[data-theme='dark'] .os-lessons-primaryButton {
  color: #211624 !important;
}

[data-theme='dark'] .os-lessons-lessonCompleted .os-lessons-lessonTopline small {
  color: #7bd398;
}

@media (max-width: 760px) {
  .os-lessons-progressCard {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .os-lessons-nextLesson {
    display: none;
  }

  .os-lessons-guideSummary small {
    display: none;
  }
}

@media (max-width: 560px) {
  .os-lessons-progressCard {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .os-lessons-primaryButton {
    width: 100%;
  }

  .os-lessons-guideGrid,
  .os-lessons-lessonGrid,
  .os-lessons-moreGrid {
    grid-template-columns: 1fr;
  }

  .os-lessons-pathHeader {
    display: block;
  }

  .os-lessons-pathHeader p {
    margin-top: 0.25rem;
  }

  .os-lessons-phaseHeader {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .os-lessons-phaseHeader > strong {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .os-lessons-progressTrack span,
  .os-lessons-guideChevron,
  .os-lessons-lessonCard {
    transition: none;
  }
}