/* Educational page: shared 2026 editorial system, scoped to the lesson. */
html:has(body.lesson-page) { background: #fff; }
html[data-theme="dark"]:has(body.lesson-page) { background: #0e1814; }
body.lesson-page {
  --ink: var(--ui-ink);
  --muted: var(--ui-muted);
  --line: var(--ui-rule);
  --accent: var(--ui-accent);
  --accent-strong: var(--ui-accent-strong);
  --danger: var(--ui-risk);
  --surface: #fff;
  --lesson-base: #fff;
  --lesson-wash: #f4f7f6;
  --lesson-warning: #946716;
  --lesson-series-1: #197e72;
  --lesson-series-2: #3675a8;
  --lesson-series-3: #a8781d;
  --lesson-section-gap: clamp(78px, 7vw, 112px);
  color: var(--ui-ink);
  background: var(--lesson-base);
  font-family: var(--ui-font-sans);
}
html[data-theme="dark"] body.lesson-page {
  background: var(--lesson-base);
  --surface: #0e1814;
  --lesson-base: #0e1814;
  --lesson-wash: #14231e;
  --lesson-warning: #efc962;
  --lesson-series-1: #62d6bf;
  --lesson-series-2: #80b4e3;
  --lesson-series-3: #ddaf62;
}
.lesson-page [hidden] { display: none !important; }
.lesson-page .lesson-shell {
  display: block;
  color: var(--ui-ink);
  width: min(var(--ui-content-max), calc(100% - 64px));
  max-width: none;
  margin: 0 auto;
  padding: 46px 0 40px;
}
.lesson-shell :is(button, select, input, textarea) { font-family: var(--ui-font-sans); }
.lesson-shell :is(h1, h2, h3, h4, p, figure) { margin: 0; }
.lesson-shell :is(p, li) { color: var(--muted); font-size: 16px; font-weight: 450; line-height: 1.6; }
.lesson-shell :is(strong, b) { font-weight: 720; }
.lesson-shell :is(a, button, input, summary):focus-visible,
.lesson-page .lesson-skip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}
.lesson-shell a { text-decoration: none; }
.lesson-shell a:hover { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 5px; }
.lesson-page .lesson-skip { position: fixed; z-index: 2000; left: 20px; top: -90px; padding: 14px; color: var(--accent); background: var(--surface); }
.lesson-page .lesson-skip:focus { top: 12px; }

/* Hero: same display scale and content edges as Pulse / Structure / SWOT. */
.lesson-eyebrow-row { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.lesson-shell .lesson-demo { font-size: 13px; line-height: 1.4; }
.lesson-hero-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(230px, .65fr); align-items: end; gap: clamp(40px, 5vw, 80px); padding: 34px 0 48px; }
.lesson-shell .lesson-country { margin-bottom: 24px; color: var(--ink); font-size: clamp(24px, 2.4vw, 36px); font-weight: 650; line-height: 1.25; }
.lesson-hero h1 { font-size: clamp(54px, 5.5vw, 92px); font-weight: 770; letter-spacing: -.062em; line-height: .98; }
.lesson-shell .lesson-lead { max-width: 740px; margin-top: 26px; font-size: clamp(18px, 1.45vw, 23px); letter-spacing: -.016em; line-height: 1.4; }
.lesson-cover { display: grid; align-content: end; gap: 26px; padding-bottom: 2px; }
.lesson-cover-mark { color: var(--accent); font-size: clamp(52px, 5vw, 80px); font-weight: 650; line-height: 1; letter-spacing: -.055em; }
.lesson-cover strong { display: block; margin-bottom: 12px; font-size: 20px; line-height: 1.25; }
.lesson-cover div > span { display: block; margin-top: 6px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.lesson-start { justify-self: start; font-size: 15px; white-space: nowrap; }

/* Native selects retain shared geometry, chevrons, focus and keyboard behavior. */
.lesson-range { display: grid; grid-template-columns: minmax(240px, 1.6fr) minmax(100px, .5fr) minmax(100px, .5fr) auto; gap: 28px 34px; align-items: end; margin: 0; padding-bottom: 24px; }
.lesson-range > label { display: grid; grid-template-rows: 16px 52px; gap: 8px; min-width: 0; }
.lesson-shell .lesson-field-label, .lesson-shell .lesson-answer-label {
  display: block; margin: 0; color: var(--muted); font-size: 12px; font-weight: 760;
  letter-spacing: .17em; line-height: 1.3; text-transform: uppercase;
}
.lesson-shell .select-field {
  display: block; position: relative; min-width: 0; width: 100%; height: 52px; min-height: 52px;
  background: transparent !important; border: 0 !important; border-bottom: 1px solid var(--ui-rule-strong) !important;
  border-radius: 0 !important; box-shadow: none !important;
}
.lesson-shell .select-field:hover, .lesson-shell .select-field:focus-within { border-bottom-color: var(--accent) !important; }
/* Select focus uses the existing bottom rule, never a surrounding rectangle. */
.lesson-shell .select-field:has(select:focus-visible) { border-bottom-width: 2px !important; }
.lesson-shell .select-field::after { width: 8px; height: 8px; right: 15px; border-color: var(--muted); }
body.lesson-page .lesson-shell .select-field select {
  width: 100%; height: 51px; min-height: 51px; padding: 0 42px 0 0 !important;
  color: var(--ink) !important; background: transparent !important; border: 0 !important; border-radius: 0;
  box-shadow: none !important; font-size: 19px; font-weight: 620; line-height: 1.15;
  white-space: nowrap; text-overflow: ellipsis; overflow: hidden; appearance: none; cursor: pointer;
}
.lesson-shell .select-field select:is(:focus, :focus-visible) { outline: none; }
.lesson-shell select option { color: var(--ink); background: var(--surface); font-weight: 450; }
.lesson-range-actions { display: flex; align-items: center; gap: 24px; padding-bottom: 2px; }
.lesson-shell .lesson-button { font-size: 15px; cursor: pointer; white-space: nowrap; }
.lesson-shell .ui-button-primary { gap: 14px; }
html[data-theme="dark"] .lesson-shell .ui-button-primary { color: #10221e; }
.lesson-shell .ui-action-link { min-height: 44px; font-size: 15px; }
.lesson-shell .ui-action-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.lesson-shell button:disabled { cursor: wait; opacity: .55; }
.lesson-shell .lesson-range-message { min-height: 20px; font-size: 13px; line-height: 1.5; }
.lesson-range-message.is-error { color: var(--danger); }
.lesson-status-slot { min-height: 64px; display: grid; align-items: center; }
.lesson-status { padding: 14px 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.lesson-status::after { content: ""; display: block; height: 2px; width: min(320px, 100%); margin-top: 12px; background: var(--accent); }
.lesson-status.is-error { color: var(--danger); }
.lesson-status.is-error::after { background: var(--danger); }
.exam-session-bar { display: flex; justify-content: space-between; flex-wrap: wrap; align-items: center; gap: 16px 32px; padding: 24px 0 36px; }
.exam-session-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; }
.lesson-sidebar .exam-sidebar-end { margin-top: 22px; font-size: 13px; gap: 8px; color: var(--accent); }
.lesson-shell .exam-session-bar p { margin: 0; color: var(--ink); font-size: 18px; }
#exam-timer { margin-left: 12px; color: var(--accent); font-size: 26px; font-weight: 650; font-variant-numeric: tabular-nums; }
/* The question shortcut remains available beyond the sidebar on every screen. */
.exam-unanswered-nav { position: fixed; z-index: 90; right: 32px; bottom: max(20px, env(safe-area-inset-bottom)); display: grid; gap: 4px; max-width: calc(100vw - 32px); min-height: 60px; padding: 12px 18px; border: 1px solid var(--line); border-radius: 0; background: var(--surface); color: var(--accent); font-family: var(--ui-font-sans); text-align: left; cursor: pointer; }
.exam-unanswered-nav > span { display: flex; align-items: center; gap: 16px; font-size: 14px; font-weight: 650; line-height: 1.4; }
.exam-unanswered-nav > span > [aria-hidden="true"] { margin-left: auto; font-size: 20px; line-height: 1; }
.exam-unanswered-nav small { color: var(--muted); font-size: 12px; line-height: 1.4; font-variant-numeric: tabular-nums; }
.exam-unanswered-nav:hover > span { color: var(--accent-strong); }
.exam-unanswered-nav:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.lesson-page.has-exam-unanswered { padding-bottom: 96px; }
.lesson-page.has-exam-end-dialog .exam-unanswered-nav { visibility: hidden; }
@media (max-width: 620px) { .exam-unanswered-nav { left: 16px; right: 16px; bottom: max(12px, env(safe-area-inset-bottom)); } }
.exam-result-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; margin-top: 20px; }
body.has-exam-end-dialog { overflow: hidden; }
.exam-end-dialog { width: min(560px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); margin: auto; padding: 40px; overflow: auto; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 0; font-family: var(--ui-font-sans); }
.exam-end-dialog::backdrop { background: rgba(23, 32, 29, .52); backdrop-filter: blur(10px); }
html[data-theme="dark"] .exam-end-dialog::backdrop { background: rgba(0, 0, 0, .72); }
.exam-end-dialog h2 { margin: 0 36px 20px 0; color: var(--ink); font-size: clamp(26px, 3vw, 34px); font-weight: 720; letter-spacing: -.035em; line-height: 1.1; }
.exam-end-dialog p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.6; }
.exam-end-dialog .lightbox-close { top: 12px; right: 12px; width: 44px; height: 44px; background: transparent; border: 0; border-radius: 0; }
.exam-end-dialog :is(button, a):focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; box-shadow: none; }
.exam-end-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; margin-top: 32px; }
.exam-end-actions button { min-height: 44px; font-family: inherit; font-size: 14px; white-space: nowrap; cursor: pointer; }
html[data-theme="dark"] .exam-end-dialog .ui-button-primary { color: #10221e; }
.exam-end-dialog #exam-end-error { margin-top: 16px; color: var(--danger); }
.exam-result-dialog { width: min(680px, calc(100vw - 32px)); }
.exam-result-dialog .exam-result-grade { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px; margin: 24px 0; color: var(--ink); }
.exam-result-grade strong { color: var(--accent); font-size: 48px; font-weight: 720; line-height: 1; }
.exam-result-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 20px; margin: 0 0 24px; }
.exam-result-metrics dt { margin-bottom: 8px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.exam-result-metrics dd { margin: 0; color: var(--ink); font-size: 26px; font-weight: 650; line-height: 1.2; font-variant-numeric: tabular-nums; }
.exam-result-dialog .exam-result-duration, .exam-result-dialog .exam-result-save { font-size: 13px; }
.exam-grade-scale { margin: 16px 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.exam-grade-scale summary { display: flex; align-items: center; gap: 12px; min-height: 44px; color: var(--accent); font-size: 14px; font-weight: 650; cursor: pointer; }
.exam-grade-scale summary::before { content: "+"; }
.exam-grade-scale[open] summary::before { content: "−"; }
.exam-grade-scale summary::-webkit-details-marker { display: none; }
.exam-grade-scale summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.exam-grade-scale ul { margin: 8px 0 12px; padding-left: 20px; }
.exam-result-dialog .exam-grade-scale p { font-size: 13px; }
.exam-sidebar-timer { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px; margin-top: 24px; color: var(--muted); font-size: 13px; }
.exam-sidebar-timer strong { color: var(--accent); font-size: 22px; font-weight: 650; font-variant-numeric: tabular-nums; }
@media (max-width: 620px) { .exam-end-dialog { padding: 32px 24px; } .exam-end-actions { align-items: stretch; flex-direction: column; gap: 12px; } .exam-end-actions .ui-action-link { justify-content: center; } }
@media (max-width: 420px) { .exam-result-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; } }
.lesson-quiz[data-answered] :is(select, input) { cursor: default !important; opacity: .65; }
.lesson-shell .lesson-quiz[data-answered] > button { cursor: default; opacity: 1; color: var(--muted); }
.lesson-shell .lesson-quiz[data-answered] > button::after { display: none; }
.lesson-quiz[data-answered] .select-field::after { opacity: .3; }
.lesson-shell .lesson-quiz[data-answered] .select-field:hover { border-bottom-color: var(--ui-rule-strong) !important; }

/* Navigation and reading grid. No duplicate card/rule boundaries. */
.lesson-layout { --lesson-rail-width: 196px; --lesson-column-gap: clamp(40px, 5vw, 80px); display: grid; grid-template-columns: var(--lesson-rail-width) minmax(0, 1fr); gap: var(--lesson-column-gap); position: relative; isolation: isolate; }
/* The navigation is a continuous white rail, independent of chapter bands. */
.lesson-layout::before { content: ""; position: absolute; z-index: -1; inset: 0 auto 0 -100vmax; width: calc(100vmax + var(--lesson-rail-width) + var(--lesson-column-gap) / 2); background: #fff; pointer-events: none; }
.lesson-sidebar { --ink: #101916; --muted: #687370; --line: #dce4e1; --accent: #087b6c; --accent-strong: #006b60; position: sticky; z-index: 1; top: calc(var(--lesson-header-height, 100px) + 24px); align-self: start; margin-top: calc(var(--lesson-section-gap) / 2); padding: 0 0 36px; color: var(--ink); background: #fff; }
.lesson-sidebar { --ui-ink: var(--ink); --ui-accent: var(--accent); --ui-accent-strong: var(--accent-strong); }
.lesson-shell .lesson-sidebar-title { margin-bottom: 18px; font-size: 11px; font-weight: 760; letter-spacing: .15em; line-height: 1.4; }
.lesson-toc { display: grid; gap: 4px; }
.lesson-toc a { display: flex; align-items: baseline; gap: 12px; min-height: 44px; padding: 10px 0; color: var(--muted); font-size: 14px; line-height: 1.4; }
.lesson-toc a > span { color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.lesson-toc a[data-active] { color: var(--accent); font-weight: 720; text-decoration: underline; text-underline-offset: 6px; }
.lesson-toc a.is-complete::after { content: "✓"; margin-left: auto; color: var(--accent); }
.lesson-progress { margin-top: 26px; }
.lesson-progress label { display: block; color: var(--ink); font-size: 14px; font-weight: 620; font-variant-numeric: tabular-nums; }
html[data-theme="dark"] .lesson-sidebar .lesson-progress label { color: var(--ink); }
.lesson-progress progress { width: 100%; height: 3px; margin: 14px 0 10px; border: 0; border-radius: 0; background: var(--line); accent-color: var(--accent); }
.lesson-progress progress::-webkit-progress-bar { background: var(--line); }
.lesson-progress progress::-webkit-progress-value { background: var(--accent); }
.lesson-progress small { display: block; color: var(--muted); font-size: 12px; line-height: 1.5; }
.lesson-body { min-width: 0; container: lesson-body / inline-size; }
.lesson-chapter { position: relative; --lesson-band: var(--lesson-base); --surface: var(--lesson-band); padding-block: calc(var(--lesson-section-gap) / 2); scroll-margin-top: var(--lesson-header-height, 68px); }
.lesson-chapter[data-tone="tint"] { --lesson-band: var(--lesson-wash); }
/* Reading bands begin in the column gap and never paint behind navigation. */
.lesson-chapter::before { content: ""; position: absolute; z-index: -1; inset: 0; background: var(--lesson-band); box-shadow: 0 0 0 100vmax var(--lesson-band); clip-path: inset(0 -100vmax 0 calc(var(--lesson-column-gap) / -2)); pointer-events: none; }
.lesson-chapter-heading { display: grid; gap: 14px; margin-bottom: 18px; }
.lesson-chapter-number { display: flex; gap: 14px; align-items: center; color: var(--accent); font-size: 11px; font-weight: 850; letter-spacing: .15em; line-height: 1.2; font-variant-numeric: tabular-nums; }
.lesson-chapter-number::before { content: ""; width: 34px; height: 1px; background: currentColor; }
.lesson-chapter h2 { color: var(--ink); font-size: clamp(30px, 3vw, 46px); font-weight: 720; letter-spacing: -.035em; line-height: 1.05; }
.lesson-shell .lesson-chapter-deck { margin-bottom: 22px; font-size: 18px; line-height: 1.4; letter-spacing: -.012em; }
.lesson-chapter > p { max-width: 860px; }
.lesson-chapter h3, .lesson-quiz[data-task="economy-type"] legend { color: var(--ink); font-size: clamp(22px, 2vw, 30px); font-weight: 650; line-height: 1.15; letter-spacing: -.025em; }
.lesson-chapter .lesson-subheading { margin-top: 56px; margin-bottom: 20px; }
.lesson-shell .lesson-caption { margin-top: 16px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.lesson-shell .lesson-task-label { margin-bottom: 18px; color: var(--accent); font-size: 12px; font-weight: 760; letter-spacing: .15em; line-height: 1.4; text-transform: uppercase; }
.lesson-indicator-grid { display: grid; gap: 52px; margin-top: 32px; }
.lesson-mystery { min-width: 0; }

/* Charts: open plotting areas, quiet sources and one consistent unit scale. */
.lesson-shell .lesson-chart-frame { min-width: 0; margin: 30px 0 24px; padding: 0; background: transparent; border: 0; border-radius: 0; box-shadow: none; }
.lesson-shell .lesson-mini-frame { margin-top: 0; }
.lesson-chart-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 10px 24px; margin-bottom: 16px; }
.lesson-chart-head h3 { font-size: 20px; font-weight: 650; letter-spacing: -.018em; line-height: 1.3; }
.lesson-chart-unit { color: var(--accent); font-size: 13px; font-weight: 450; line-height: 1.4; }
.lesson-chart { position: relative; height: 350px; width: 100%; }
.lesson-mini-chart { height: 280px; }
.lesson-chart-source { margin-top: 16px; color: var(--muted); font-size: 13px; font-weight: 450; line-height: 1.5; }
.lesson-chart-source a, .lesson-event a, .lesson-feedback a { color: var(--muted); }
.lesson-legend { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin: 18px 0 8px; font-size: 13px; }
.lesson-legend span { display: flex; align-items: center; gap: 9px; }
.lesson-legend i { width: 18px; height: 3px; flex: 0 0 auto; background: var(--series-color); }
.lesson-viz { width: 100%; min-width: 0; height: 400px; }
.lesson-treemap { height: 480px; }
.lesson-river { height: 340px; }
.lesson-pulse-map { position: relative; height: 550px; overflow: hidden; }
.lesson-pulse-controls { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 14px; width: 100%; margin: 24px auto 0; }
.lesson-pulse-controls .pulse-timeline-button.icon-button { grid-column: 2; width: 40px; height: 40px; color: var(--accent); background: transparent; border: 1px solid var(--accent); border-radius: 50%; box-shadow: none; }
.lesson-pulse-controls .pulse-timeline-button.icon-button:is(:hover, :focus-visible) { color: var(--surface); background: var(--accent); border-color: var(--accent); box-shadow: none; }
.lesson-pulse-controls .pulse-timeline-current { grid-column: 3; justify-self: start; color: var(--muted); background: transparent; border: 0; font-size: 13px; }
@media (max-width: 640px) { .lesson-pulse-map { height: var(--pulse-mobile-map-height, 540px); } }

/* Questions and their states: controls lighter than the evidence. */
.lesson-quiz { margin: 32px 0 0; padding: 0; scroll-margin-top: calc(var(--lesson-header-height, 100px) + 24px); scroll-margin-bottom: 108px; }
.lesson-quiz[data-task="economy-type"] { margin-top: 56px; }
.lesson-quiz + .lesson-quiz { margin-top: 42px; }
.lesson-quiz fieldset { min-width: 0; border: 0; padding: 0; margin: 0; }
.lesson-quiz legend { max-width: 100%; margin-bottom: 20px; padding: 0; color: var(--ink); font-size: 18px; font-weight: 650; letter-spacing: -.01em; line-height: 1.4; }
.lesson-shell .lesson-answer-label { margin-bottom: 8px; font-size: 11px; }
body.lesson-page .lesson-quiz .select-field select { font-size: 16px; }
.lesson-quiz > button { margin-top: 16px; }
.lesson-quiz-compact { margin-top: 24px; }
.lesson-checkboxes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 28px; }
.lesson-checkboxes label { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 8px 0; color: var(--ink); font-size: 16px; font-weight: 450; letter-spacing: 0; line-height: 1.4; text-transform: none; cursor: pointer; }
.lesson-checkboxes label:hover { color: var(--accent); }
.lesson-checkboxes input { width: 18px; height: 18px; flex: 0 0 auto; margin: 0; accent-color: var(--accent); }
.lesson-feedback { margin-top: 20px; padding: 20px 24px; color: var(--ink); background: var(--lesson-wash); border-left: 2px solid var(--lesson-warning); font-size: 16px; line-height: 1.6; }
.lesson-feedback:empty { display: none; }
.lesson-feedback[data-correct="true"] { border-left-color: var(--accent); }
.lesson-feedback > strong { display: block; color: var(--ink); font-size: 18px; font-weight: 650; line-height: 1.4; }
.lesson-feedback p { margin-top: 12px; font-size: 15px; }
.lesson-feedback ul { padding-left: 20px; }
.lesson-feedback li + li { margin-top: 8px; }
.lesson-feedback > a { display: inline-flex; align-items: center; min-height: 44px; margin-top: 8px; font-size: 13px; }
.lesson-feedback-verdict { display: block; margin-bottom: 12px; color: var(--accent); font-size: 11px; font-weight: 760; letter-spacing: .15em; line-height: 1.4; text-transform: uppercase; }
.lesson-feedback[data-correct="false"] .lesson-feedback-verdict { color: var(--lesson-warning); }
.lesson-pulse-questions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 40px 36px; margin-top: 44px; }
.lesson-pulse-questions article { min-width: 0; }
.lesson-pulse-questions .lesson-quiz { margin: 0; }
.lesson-pulse-questions .lesson-quiz legend { font-size: 20px; }

/* Events share the site's metadata/text reading-list pattern. */
.lesson-events { display: grid; margin-top: 32px; }
.lesson-event { padding: 26px 0; }
.lesson-event + .lesson-event { border-top: 1px solid var(--line); }
.lesson-event h3 { font-size: 20px; font-weight: 650; line-height: 1.3; letter-spacing: -.018em; }
.lesson-event p { margin-top: 12px; font-size: 16px; }
.lesson-event a { display: inline-flex; align-items: center; min-height: 44px; margin-top: 6px; font-size: 13px; line-height: 1.5; }

/* Structure, conflicts and SWOT retain their established visual semantics. */
.lesson-pie-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 28px; }
.lesson-pie-grid figure { min-width: 0; margin: 0; padding: 0; background: transparent; border: 0; }
.lesson-pie-grid h4 { color: var(--ink); text-align: center; font-size: 15px; font-weight: 650; line-height: 1.3; }
.lesson-pie { height: 220px; }
.sector-key { font-weight: 620; white-space: nowrap; }
.sector-services { color: var(--lesson-series-1); }
.sector-industry { color: var(--lesson-series-2); }
.sector-agriculture { color: var(--lesson-series-3); }
.lesson-conflict-overview { margin-top: 30px; }
.lesson-conflict-overview p { max-width: 840px; margin-top: 18px; }
.lesson-conflict-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin: 32px 0; }
.lesson-conflict-metrics > div { position: relative; padding-top: 24px; border-top: 1px solid var(--line); }
.lesson-conflict-metrics > div::before { content: ""; position: absolute; top: -1px; left: 0; width: 34px; height: 2px; background: var(--accent); }
.lesson-conflict-metrics > div:nth-child(2)::before { background: var(--muted); }
.lesson-conflict-metrics > div:nth-child(3)::before { background: var(--danger); }
.lesson-conflict-metrics span { display: block; min-height: 34px; color: var(--muted); font-size: 11px; font-weight: 760; letter-spacing: .15em; line-height: 1.5; text-transform: uppercase; }
.lesson-conflict-metrics strong { display: block; margin-top: 14px; color: var(--ink); font-size: clamp(42px, 4vw, 68px); font-weight: 770; letter-spacing: -.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.lesson-swot-map { position: relative; margin-top: 32px; background: conic-gradient(from 0deg, rgba(25,126,114,.045) 0deg 90deg, rgba(55,137,154,.045) 90deg 180deg, rgba(185,91,73,.045) 180deg 270deg, rgba(181,129,48,.045) 270deg 360deg); }
.lesson-swot-chart { height: 940px; }
.lesson-chapter .swot-label { position: absolute; z-index: 1; max-width: 43%; margin: 0; font-size: 12px; font-weight: 760; letter-spacing: .02em; line-height: 1.35; pointer-events: none; }
.swot-label.weakness { top: 20px; left: 20px; color: var(--lesson-series-3); }
.swot-label.strength { top: 20px; right: 20px; color: var(--accent); }
.swot-label.threat { bottom: 20px; left: 20px; color: var(--danger); }
.swot-label.opportunity { bottom: 20px; right: 20px; color: var(--lesson-series-2); }
.swot-axis { position: absolute; z-index: 1; display: inline-flex; align-items: center; min-height: 24px; padding: 0 9px; color: var(--muted); background: var(--surface); border: 1px solid var(--ui-rule-strong); border-radius: 2px; font-size: 10px; font-weight: 760; letter-spacing: .12em; line-height: 1.2; text-transform: uppercase; pointer-events: none; }
.swot-axis.internal, .swot-axis.external { left: 50%; transform: translateX(-50%); }
.swot-axis.internal { top: 16px; }
.swot-axis.external { bottom: 16px; }
.swot-axis.pressure, .swot-axis.support { top: 50%; transform: translateY(-50%); }
.swot-axis.pressure { left: 16px; }
.swot-axis.support { right: 16px; }
.lesson-result { margin-bottom: 64px; padding: 28px; background: var(--lesson-wash); border-left: 2px solid var(--accent); }
.lesson-result h3 { font-size: 26px; font-weight: 650; letter-spacing: -.025em; }
.lesson-result p { margin-top: 14px; }
.lesson-method { padding-top: calc(var(--lesson-section-gap) / 2); padding-bottom: 64px; }
.lesson-method h2 { margin-bottom: 22px; font-size: 26px; font-weight: 650; letter-spacing: -.025em; line-height: 1.15; }
.lesson-method p { max-width: 860px; margin-top: 14px; font-size: 14px; line-height: 1.6; }
.lesson-shell .lesson-missing { margin: 24px 0 0; padding: 0 0 0 18px; color: var(--muted); border-left: 2px solid var(--line); font-size: 15px; line-height: 1.6; }

@container lesson-body (min-width: 980px) {
  .lesson-indicator-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
  .lesson-mini-chart { height: 250px; }
  .lesson-mini-frame .lesson-chart-head { min-height: 70px; align-content: start; }
  .lesson-mini-frame .lesson-chart-head h3 { flex-basis: 100%; }
  .lesson-indicator-grid .lesson-quiz legend { min-height: 50px; }
}
@media (max-width: 1180px) {
  .lesson-page .lesson-shell { width: calc(100% - 40px); }
  .lesson-range { grid-template-columns: minmax(240px, 1fr) repeat(2, minmax(100px, .4fr)); }
  .lesson-range-actions { grid-column: 1 / -1; }
  .lesson-layout { --lesson-rail-width: 172px; --lesson-column-gap: 36px; }
  .lesson-hero-grid { grid-template-columns: minmax(0, 1fr) 240px; gap: 40px; }
}
@media (max-width: 920px) {
  .lesson-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .lesson-cover { grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 24px; }
  .lesson-cover-mark { display: none; }
  .lesson-cover strong { font-size: 18px; }
  .lesson-layout { display: block; }
  .lesson-layout::before { display: none; }
  .lesson-sidebar { position: relative; top: auto; margin-top: 0; padding-block: 24px 48px; }
  .lesson-sidebar::before { content: ""; position: absolute; z-index: -1; inset: 0; background: #fff; box-shadow: 0 0 0 100vmax #fff; clip-path: inset(0 -100vmax); pointer-events: none; }
  .lesson-chapter::before { clip-path: inset(0 -100vmax); }
  .lesson-toc { display: flex; gap: 26px; overflow-x: auto; padding-bottom: 12px; }
  .lesson-toc a { flex: 0 0 auto; white-space: nowrap; }
  .lesson-progress { display: grid; grid-template-columns: auto minmax(100px, 1fr); gap: 8px 24px; align-items: center; margin-top: 12px; }
  .lesson-progress progress { margin: 0; }
  .lesson-progress small { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .lesson-page .lesson-shell { width: calc(100% - 32px); padding-top: 20px; }
  .lesson-eyebrow-row { gap: 14px; }
  .lesson-eyebrow { font-size: 11px; letter-spacing: .15em; }
  .lesson-eyebrow::before { width: 24px; }
  .lesson-shell .lesson-demo { max-width: 66px; font-size: 12px; }
  .lesson-hero-grid { padding: 28px 0 34px; }
  .lesson-hero h1 { font-size: clamp(42px, 12vw, 66px); letter-spacing: -.06em; }
  .lesson-shell .lesson-country { margin-bottom: 20px; font-size: 26px; }
  .lesson-shell .lesson-lead { font-size: 18px; }
  .lesson-cover { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .lesson-cover div > span { font-size: 13px; }
  .lesson-range { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }
  .lesson-country-field { grid-column: 1 / -1; }
  .lesson-range-actions { justify-content: space-between; gap: 14px; }
  .lesson-shell .lesson-range-actions .lesson-button { font-size: 14px; }
  .lesson-shell .lesson-range-actions .ui-button-primary { padding-inline: 14px; gap: 10px; }
  .lesson-shell .lesson-range-actions .ui-action-link { gap: 6px; }
  .lesson-status-slot { min-height: 48px; }
  .lesson-chapter { padding-block: 36px; }
  .lesson-chapter h2 { font-size: 34px; }
  .lesson-chapter h3, .lesson-quiz[data-task="economy-type"] legend { font-size: 22px; }
  .lesson-quiz[data-task="economy-type"] { margin-top: 40px; }
  .lesson-chapter .lesson-subheading { margin-top: 40px; }
  .lesson-chart-head h3 { font-size: 20px; }
  .lesson-chart { height: 300px; }
  .lesson-mini-chart { height: 270px; }
  .lesson-chart-source { font-size: 12px; }
  .lesson-chart-unit { font-size: 13px; }
  .lesson-legend { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px 10px; font-size: 12px; }
  .lesson-checkboxes, .lesson-pulse-questions { grid-template-columns: minmax(0, 1fr); }
  .lesson-feedback { padding: 18px; }
  .lesson-event { padding-block: 24px; }
  .lesson-event h3 { font-size: 20px; }
  .lesson-pie-grid { gap: 12px; }
  .lesson-pie-grid h4 { font-size: 13px; }
  .lesson-pie { height: 132px; }
  .lesson-treemap { height: 360px; }
  .lesson-river { height: 300px; }
  .lesson-conflict-metrics { gap: 14px; }
  .lesson-conflict-metrics span { min-height: 48px; font-size: 10px; letter-spacing: .1em; }
  .lesson-swot-chart { height: 1040px; }
  .lesson-chapter .swot-label { font-size: 11px; }
  .swot-label.weakness, .swot-label.threat { left: 12px; }
  .swot-label.strength, .swot-label.opportunity { right: 12px; text-align: right; }
  .swot-axis { font-size: 9px; letter-spacing: .08em; }
  .swot-axis.internal { top: 62px; }
  .swot-axis.external { bottom: 62px; }
  .swot-axis.pressure { left: 10px; }
  .swot-axis.support { right: 10px; }
  .lesson-method { padding-bottom: 44px; }
}
@media (max-width: 360px) {
  .lesson-range-actions { gap: 12px; }
  .lesson-shell .lesson-range-actions .lesson-button { font-size: 13px; }
  .lesson-shell .lesson-range-actions .ui-button-primary { padding-inline: 10px; gap: 8px; }
  .lesson-shell .lesson-range-actions .ui-action-link { gap: 5px; }
}
@media (max-width: 760px) {
  /* The shared mobile header scrolls with the document. */
  .lesson-chapter { scroll-margin-top: 0; }
  .lesson-page .site-footer { padding-inline: 0; }
  .lesson-page .site-footer-inner { width: calc(100% - 32px); }
}
@media (prefers-reduced-motion: reduce) {
  .lesson-shell *, .lesson-shell *::after { scroll-behavior: auto; transition: none; }
}
@media print {
  .lesson-page :is(.app-header, .donation-strip, .site-footer, .lesson-sidebar, .lesson-range, .lesson-start, .lesson-demo, .lesson-quiz button, .lesson-skip) { display: none !important; }
  .lesson-page .lesson-shell { width: 100%; }
  .lesson-layout { display: block; }
  .lesson-chapter { break-inside: avoid; }
}