.lesson-page {
  max-width: 760px;
  margin: 96px auto 80px;
  padding: 0 24px;
  font: 400 16px/1.7 Inter, sans-serif;
  color: var(--text-secondary);
}
.lesson-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 500 14px/1 Inter, sans-serif;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 0;
  margin-bottom: 24px;
  transition: color .15s ease;
}
.lesson-back:hover { color: #10b981; }
[data-theme="light"] .lesson-back:hover { color: #059669; }

.lesson-head { margin-bottom: 32px; }
.lesson-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(245,158,11,0.14);
  color: #f59e0b;
  font: 600 11px/1 Inter, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
[data-theme="light"] .lesson-badge { color: #b45309; }
.lesson-title {
  font: 700 32px/1.25 Onest, Inter, sans-serif;
  margin: 0;
  color: var(--text);
}
.lesson-meta {
  margin: 10px 0 0;
  font: 500 14px/1.5 Inter, sans-serif;
  color: var(--text-muted);
}

.lesson-toc {
  margin: 0 0 36px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-card);
}
.lesson-toc-title {
  margin: 0 0 12px;
  font: 600 12px/1 Inter, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.lesson-toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.lesson-toc li { margin: 0; }
.lesson-toc a {
  display: block;
  font: 500 15px/1.5 Inter, sans-serif;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .15s ease;
}
.lesson-toc a:hover { color: #f59e0b; }
[data-theme="light"] .lesson-toc a:hover { color: #b45309; }

.lesson h2 {
  font: 700 22px/1.3 Onest, Inter, sans-serif;
  margin: 36px 0 14px;
  color: var(--text);
}
.lesson h3 {
  font: 600 17px/1.4 Onest, Inter, sans-serif;
  margin: 22px 0 10px;
  color: var(--text);
}
.lesson p { margin: 0 0 14px; }
.lesson ul, .lesson ol {
  margin: 0 0 14px;
  padding-left: 22px;
}
.lesson li { margin: 6px 0; }
.lesson li::marker { color: var(--text-muted); }
.lesson strong { color: var(--text); font-weight: 600; }
.lesson em { color: var(--text); }
.lesson blockquote {
  margin: 18px 0;
  padding: 16px 20px;
  border-left: 3px solid #f59e0b;
  background: var(--bg-secondary);
  border-radius: 0 10px 10px 0;
  font: 500 15.5px/1.65 Inter, sans-serif;
  color: var(--text);
}
.lesson blockquote p { margin: 0 0 8px; }
.lesson blockquote p:last-child { margin: 0; }

.lesson-table-wrap {
  overflow-x: auto;
  margin: 14px 0 22px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
}
.lesson-table {
  width: 100%;
  border-collapse: collapse;
  font: 400 14.5px/1.55 Inter, sans-serif;
}
.lesson-table thead th {
  text-align: left;
  padding: 12px 16px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font: 600 12px/1.2 Inter, sans-serif;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.lesson-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}
.lesson-table tbody tr:last-child td { border-bottom: none; }
.lesson-table tbody td:first-child {
  font-weight: 600;
  color: var(--text);
  width: 38%;
}

.lesson-summary {
  margin: 36px 0 0;
  padding: 22px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid #f59e0b;
  border-radius: 14px;
}
.lesson-summary h2 { margin-top: 0; }
.lesson-summary ol { margin: 8px 0 0; padding-left: 22px; }
.lesson-summary li { margin: 8px 0; color: var(--text); }

.lesson-next-hint {
  margin: 28px 0 0;
  color: var(--text-muted);
  font-size: 15px;
}

.lesson-nav {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
}
.lesson-nav > :nth-child(1) { justify-self: start; }
.lesson-nav > :nth-child(2) { justify-self: center; }
.lesson-nav > :nth-child(3) { justify-self: end; }
.lesson-nav-spacer { display: block; min-height: 1px; }
@media (max-width: 700px) {
  .lesson-nav { grid-template-columns: 1fr; gap: 10px; }
  .lesson-nav > :nth-child(1),
  .lesson-nav > :nth-child(2),
  .lesson-nav > :nth-child(3) { justify-self: stretch; }
  .lesson-nav .lesson-nav-btn { justify-content: center; width: 100%; }
  .lesson-nav-spacer { display: none; }
}
.lesson-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font: 600 14px/1 Inter, sans-serif;
  text-decoration: none;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}
.lesson-nav-btn:hover {
  border-color: rgba(245,158,11,0.5);
  background: rgba(245,158,11,0.08);
  color: #f59e0b;
}
[data-theme="light"] .lesson-nav-btn:hover { color: #b45309; border-color: rgba(180,83,9,0.5); }

/* --- Смысловые блоки урока со стикером (💡/👩🏻‍🎓/🛠️/📝) --- */
.lesson-block {
  margin: 18px 0;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--block-accent, #f59e0b);
  border-radius: 0 14px 14px 0;
  background: var(--bg-card);
}
.lesson-block > :first-child { margin-top: 0; }
.lesson-block > :last-child { margin-bottom: 0; }
.lesson-block h3 { margin-top: 18px; }
.lesson-block > h3:first-of-type { margin-top: 4px; }
.lesson-block-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font: 700 17px/1.35 Onest, Inter, sans-serif;
  color: var(--text);
}
.lesson-block-ico { flex: 0 0 auto; font-size: 22px; line-height: 1; }
.lesson-block--idea { --block-accent: #f59e0b; }
.lesson-block--theory { --block-accent: #38bdf8; }
.lesson-block--practice { --block-accent: #34d399; }
.lesson-block--task { --block-accent: #f472b6; }
@media (max-width: 700px) {
  .lesson-block { padding: 16px 18px; }
  .lesson-block-title { font-size: 16px; }
}

.lesson-figure {
  margin: 18px 0;
}
.lesson-figure-link {
  display: block;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-card);
  line-height: 0;
  transition: border-color .15s ease;
}
.lesson-figure-link:hover { border-color: #f59e0b; }
.lesson-figure-link img {
  display: block;
  width: 100%;
  height: auto;
}
.lesson-figure figcaption {
  margin-top: 10px;
  font: 400 13px/1.5 Inter, sans-serif;
  color: var(--text-muted);
}

.af-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(10, 11, 22, 0.88);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  cursor: zoom-out;
}
.af-lightbox.is-open { display: flex; }
.af-lightbox-img {
  max-width: 96vw;
  max-height: 90vh;
  width: auto;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  cursor: default;
}
.af-lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.af-lightbox-close:hover {
  background: rgba(245, 158, 11, 0.25);
  border-color: #f59e0b;
}
body.af-lightbox-lock { overflow: hidden; }

.lesson-task-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0 4px;
  padding: 12px 22px;
  border-radius: 999px;
  background: #f59e0b;
  color: #1a1c2e;
  font: 700 14px/1 Inter, sans-serif;
  text-decoration: none;
  transition: opacity .15s ease, transform .05s ease;
}
.lesson-task-cta:hover { opacity: 0.9; }
.lesson-task-cta:active { transform: translateY(1px); }

.lesson-answer {
  margin: 18px 0 8px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-card);
}
.lesson-answer-label {
  display: block;
  margin-bottom: 10px;
  font: 600 12px/1 Inter, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.lesson-answer-input {
  width: 100%;
  box-sizing: border-box;
  min-height: 120px;
  resize: vertical;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: 400 15px/1.6 Inter, sans-serif;
}
.lesson-answer-input:focus { outline: none; border-color: #f59e0b; }
.lesson-answer-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 12px;
}
.lesson-answer-btn {
  appearance: none;
  border: none;
  cursor: pointer;
  padding: 10px 20px;
  border-radius: 999px;
  background: #f59e0b;
  color: #1a1c2e;
  font: 600 14px/1 Inter, sans-serif;
  transition: opacity .15s ease, transform .05s ease;
}
.lesson-answer-btn:hover:not(:disabled) { opacity: 0.9; }
.lesson-answer-btn:active:not(:disabled) { transform: translateY(1px); }
.lesson-answer-btn:disabled { opacity: 0.5; cursor: default; }
.lesson-answer-status {
  font: 500 13.5px/1.4 Inter, sans-serif;
  color: var(--text-muted);
}
.lesson-answer-status.is-ok { color: #10b981; }
.lesson-answer-status.is-err { color: #ef4444; }
.lesson-answer-hint {
  margin: 12px 0 0;
  font: 400 13px/1.5 Inter, sans-serif;
  color: var(--text-muted);
}
[data-theme="light"] .lesson-answer-status.is-ok { color: #059669; }

@media (max-width: 700px) {
  .lesson-page { margin: 72px auto 56px; padding: 0 16px; font-size: 15.5px; }
  .lesson-title { font-size: 24px; }
  .lesson h2 { font-size: 19px; }
  .lesson h3 { font-size: 16px; }
  .lesson-summary { padding: 18px; }
  .lesson-table tbody td:first-child { width: auto; }
}

/* --- Аккордеон уроков внутри страницы модуля --- */
.lesson-acc-controls {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin: 0 0 14px;
}
.lesson-acc-ctrl {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font: 600 13px/1 Inter, sans-serif;
  padding: 9px 16px;
  border-radius: 999px;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.lesson-acc-ctrl:hover {
  border-color: rgba(245,158,11,0.5);
  color: #f59e0b;
  background: rgba(245,158,11,0.08);
}
[data-theme="light"] .lesson-acc-ctrl:hover { color: #b45309; border-color: rgba(180,83,9,0.5); }
@media (max-width: 700px) {
  .lesson-acc-controls { gap: 8px; }
  .lesson-acc-ctrl { flex: 1; padding: 11px 8px; }
}
.lesson-acc {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-card);
  margin: 0 0 12px;
}
.lesson-acc[open] { border-color: rgba(245,158,11,0.4); }
.lesson-acc-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.lesson-acc-summary::-webkit-details-marker { display: none; }
.lesson-acc-summary::marker { content: ""; }
.lesson-acc-summary:focus-visible {
  outline: 2px solid #f59e0b;
  outline-offset: -2px;
  border-radius: 14px;
}
.lesson-acc-heading {
  font: 700 20px/1.35 Onest, Inter, sans-serif;
  color: var(--text);
  transition: color .15s ease;
}
.lesson-acc-summary:hover .lesson-acc-heading { color: #f59e0b; }
[data-theme="light"] .lesson-acc-summary:hover .lesson-acc-heading { color: #b45309; }
.lesson-acc-chevron {
  flex: 0 0 auto;
  color: var(--text-muted);
  transition: transform .2s ease;
}
.lesson-acc[open] .lesson-acc-chevron { transform: rotate(180deg); }
.lesson-acc-body {
  padding: 16px 22px 20px;
  border-top: 1px solid var(--border);
}
.lesson-acc-body > :first-child { margin-top: 0; }
.lesson-acc-body > :last-child { margin-bottom: 0; }
@media (max-width: 700px) {
  .lesson-acc-summary { padding: 16px; }
  .lesson-acc-heading { font-size: 17px; }
  .lesson-acc-body { padding: 14px 16px 16px; }
}