/* DIR-50: readable lesson and practice sequence. Content and progress logic stay in index.html. */
.lessonPage {
  width: min(100%, 820px);
  margin-inline: auto;
  padding-bottom: 20px;
  overflow-wrap: anywhere;
}

.lessonPage .breadcrumbs {
  margin-bottom: 16px;
}

.lessonHero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid var(--dirck-color-border, var(--border));
  border-radius: var(--dirck-radius-xl, 28px);
  background:
    radial-gradient(circle at 92% 0%, rgba(117, 180, 129, 0.2), transparent 38%),
    linear-gradient(145deg, rgba(43, 69, 49, 0.94), rgba(16, 35, 23, 0.98));
  box-shadow: var(--dirck-shadow-md, 0 18px 50px rgba(0, 0, 0, 0.25));
}

.lessonHeroEyebrow,
.lessonStepType,
.lessonSectionEyebrow,
.lessonProgressLabel {
  color: var(--dirck-color-warm, var(--accent));
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.lessonHero h1 {
  max-width: 16ch;
  margin: 10px 0 12px;
  color: var(--dirck-color-text, var(--text));
  font-family: var(--dirck-font-display, var(--serif));
  font-size: clamp(34px, 7vw, 56px);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.lessonPurpose {
  max-width: 62ch;
  margin: 0;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.65;
}

.lessonStats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.lessonStat {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 6px 11px;
  border: 1px solid rgba(229, 221, 193, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.055);
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 12px;
  font-weight: 750;
}

.lessonProgress {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(229, 221, 193, 0.16);
}

.lessonProgressHeader {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.lessonProgressValue {
  color: var(--dirck-color-accent, var(--accent));
  font-size: 18px;
  font-weight: 900;
}

.lessonProgressText {
  margin: 9px 0 0;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 13px;
  line-height: 1.5;
}

.lessonSection {
  margin-top: clamp(28px, 6vw, 46px);
}

.lessonSectionHead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px 20px;
  align-items: end;
  margin-bottom: 14px;
}

.lessonSectionHead h2 {
  margin: 4px 0 0;
  font-family: var(--dirck-font-display, var(--serif));
  font-size: clamp(25px, 4vw, 34px);
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.lessonSectionHead p,
.lessonSectionCount {
  margin: 6px 0 0;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 13px;
  line-height: 1.5;
}

.lessonSectionCount {
  white-space: nowrap;
}

.lessonStack {
  display: grid;
  gap: 14px;
}

.lessonStep {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 4vw, 26px);
  border: 1px solid var(--dirck-color-border, var(--border));
  border-radius: var(--dirck-radius-lg, 22px);
  background: var(--dirck-color-surface, rgba(24, 38, 29, 0.96));
  box-shadow: var(--dirck-shadow-sm, 0 10px 28px rgba(0, 0, 0, 0.16));
}

.lessonStep[data-kind="keyconcepts"],
.lessonStep[data-kind="selfcheck"],
.lessonStep[data-kind="progresscheck"] {
  border-inline-start: 4px solid var(--dirck-color-accent, var(--accent));
}

.lessonStep[data-kind="practiceassignment"],
.lessonStep[data-kind="reflection"] {
  border-inline-start: 4px solid var(--dirck-color-warm, #ecd2ae);
}

.lessonStepHeader {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
}

.lessonStepTitle {
  margin: 5px 0 0;
  color: var(--dirck-color-text, var(--text));
  font-family: var(--dirck-font-body, inherit);
  font-size: clamp(17px, 3vw, 21px);
  line-height: 1.25;
}

.lessonStepToggle,
.lessonDetailsToggle {
  min-width: 76px;
  min-height: 44px;
  padding: 9px 13px;
  border: 1px solid var(--dirck-color-border-strong, rgba(229, 221, 193, 0.25));
  border-radius: var(--dirck-radius-md, 14px);
  background: var(--dirck-color-surface-raised, rgba(255, 255, 255, 0.07));
  color: var(--dirck-color-text, var(--text));
  font: inherit;
  font-size: 13px;
  font-weight: 850;
  cursor: pointer;
}

.lessonStepToggle[aria-expanded="true"],
.lessonDetailsToggle[aria-expanded="true"] {
  border-color: var(--dirck-color-accent, var(--accent));
  color: var(--dirck-color-accent, var(--accent));
}

.lessonStepBody {
  max-width: 68ch;
  margin-top: 18px;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 15px;
  line-height: 1.72;
}

.lessonStepBody[hidden],
.lessonDetails[hidden] {
  display: none;
}

.lessonStepBody p,
.lessonStepBody ul,
.lessonStepBody ol {
  margin: 0 0 14px;
}

.lessonStepBody li + li {
  margin-top: 8px;
}

.lessonVideoStep {
  display: grid;
  gap: 18px;
}

.lessonVideoHeader {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.lessonVideoStatusDot {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  margin-top: 3px;
  border: 2px solid var(--dirck-color-text-muted, var(--muted));
  border-radius: 50%;
  background: transparent;
}

.lessonVideoStatusDot.done {
  border-color: var(--dirck-color-accent, var(--accent));
  background: var(--dirck-color-accent, var(--accent));
  box-shadow: inset 0 0 0 3px var(--dirck-color-surface, #18261d);
}

.lessonVideoTitle {
  margin: 4px 0 0;
  color: var(--dirck-color-text, var(--text));
  font-size: clamp(18px, 3.4vw, 23px);
  line-height: 1.25;
}

.lessonVideoMeta,
.lessonSaveStatus,
.lessonTaskGate {
  margin-top: 8px;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 12px;
  line-height: 1.45;
}

.lessonVideoMeta strong {
  color: var(--dirck-color-text, var(--text));
}

.lessonVideoActions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.lessonWatchButton {
  min-height: 48px;
  flex: 1 1 210px;
  justify-content: center;
  text-decoration: none;
}

.lessonDetailsToggle {
  flex: 0 0 auto;
  min-height: 48px;
}

.lessonDetails {
  padding-top: 16px;
  border-top: 1px solid var(--dirck-color-border, var(--border));
}

.lessonDetails p {
  max-width: 66ch;
  margin: 0;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 14px;
  line-height: 1.65;
}

.lessonNotesLabel {
  display: block;
  margin-top: 16px;
  color: var(--dirck-color-text, var(--text));
  font-size: 13px;
  font-weight: 800;
}

.lessonPage .notes,
.lessonPage .noteBox {
  min-height: 104px;
  margin-top: 8px;
  padding: 13px 14px;
  border-radius: var(--dirck-radius-md, 14px);
  font-size: 16px;
  line-height: 1.5;
}

.lessonTaskCard .lessonStepBody {
  max-width: none;
}

.lessonTaskInstructions {
  max-width: 68ch;
}

.lessonTaskInstructions p,
.lessonTaskInstructions ul,
.lessonTaskInstructions ol {
  margin-top: 0;
}

.lessonTaskComplete {
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: 11px;
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid var(--dirck-color-border, var(--border));
  border-radius: var(--dirck-radius-md, 14px);
  background: var(--dirck-color-surface-raised, rgba(255, 255, 255, 0.05));
  color: var(--dirck-color-text, var(--text));
  font-size: 14px;
  font-weight: 800;
}

.lessonTaskComplete input {
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  accent-color: var(--dirck-color-accent, var(--accent));
}

.lessonTaskComplete:has(input:disabled) {
  color: var(--dirck-color-text-muted, var(--muted));
  cursor: not-allowed;
}

.lessonMastery {
  margin-top: clamp(28px, 6vw, 46px);
}

.lessonNextAction {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin-top: 18px;
  padding: clamp(18px, 4vw, 25px);
  border: 1px solid var(--dirck-color-border-strong, var(--border));
  border-radius: var(--dirck-radius-lg, 22px);
  background: linear-gradient(140deg, rgba(117, 180, 129, 0.13), rgba(255, 255, 255, 0.035));
}

.lessonNextAction h2 {
  margin: 4px 0 5px;
  font-size: clamp(20px, 4vw, 27px);
}

.lessonNextAction p {
  margin: 0;
  color: var(--dirck-color-text-muted, var(--muted));
  font-size: 13px;
  line-height: 1.5;
}

.lessonNextButtons {
  display: flex;
  gap: 9px;
  align-items: center;
}

.lessonNextButtons .dirckButton {
  min-height: 48px;
  white-space: nowrap;
}

[data-theme="light"] .lessonHero {
  background:
    radial-gradient(circle at 92% 0%, rgba(61, 137, 82, 0.19), transparent 38%),
    linear-gradient(145deg, #f3f5ed, #e6ecdf);
}

[data-theme="light"] .lessonStat {
  border-color: rgba(28, 55, 36, 0.16);
  background: rgba(255, 255, 255, 0.58);
}

@media (max-width: 720px) {
  .lessonPage {
    padding-bottom: 6px;
  }

  .lessonPage > .pageBack,
  .lessonPage > .breadcrumbs {
    margin-inline: 1px;
  }

  .lessonHero {
    padding: 24px 20px;
    border-radius: 22px;
  }

  .lessonHero h1 {
    max-width: none;
    font-size: clamp(29px, 9.3vw, 38px);
  }

  .lessonSectionHead,
  .lessonNextAction {
    grid-template-columns: 1fr;
  }

  .lessonSectionCount {
    white-space: normal;
  }

  .lessonStepHeader {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .lessonStep {
    padding: 18px;
    border-radius: 18px;
  }

  .lessonVideoActions,
  .lessonNextButtons {
    display: grid;
    grid-template-columns: 1fr;
  }

  .lessonWatchButton,
  .lessonDetailsToggle,
  .lessonNextButtons .dirckButton {
    width: 100%;
  }

  .lessonNextAction {
    position: relative;
    margin-top: 16px;
  }
}

@media (max-width: 360px) {
  .lessonStepHeader {
    grid-template-columns: 1fr;
  }

  .lessonStepToggle {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lessonPage *,
  .lessonPage *::before,
  .lessonPage *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}