/* Mavzu va toifa javobi uchun umumiy blok uslublari.
 *
 * Ikki o'quvchi shu faylni yuklaydi, shuning uchun unda sahifa karkasi yo'q:
 * yo'l, sarlavha, mundarija paneli va qo'shni mavzular `pages/mavzu.css` da.
 *
 * Dizayn tili — «Sukunat» (spec 2026-09-07 §4): rubrika qutiga solinmaydi,
 * chap chiziq va yorliq bilan ajratiladi. Ranglar faqat tokendan.
 *
 * `--lesson-scale` matn o'lchami sozlamasidan keladi: o'quvchi uni o'z
 * root iga qo'yadi, blok esa meros oladi. Sozlama yo'q sahifada u 1 ga
 * tushadi va hech narsa buzilmaydi.
 */

.lesson-body { font-size: calc(18px * var(--lesson-scale, 1)); line-height: 1.75; color: var(--text-body); overflow-wrap: break-word; }
.lesson-body p { margin: 0 0 24px; }
.lesson-body code { font-family: var(--font-mono); font-size: .9em; color: var(--text-primary); }
.lesson-body strong { color: var(--text-primary); font-weight: 500; }
.lesson-body a { color: var(--accent); text-decoration: none; }

.lesson-lead { margin: 40px 0 0; font-size: calc(22px * var(--lesson-scale, 1)); line-height: 1.5; font-weight: 300; color: var(--text-primary); }
.lesson-chapter { margin: 56px 0 20px; font-size: calc(30px * var(--lesson-scale, 1)); line-height: 1.2; font-weight: 400; letter-spacing: -.02em; color: var(--text-primary); }
.lesson-section { margin: 56px 0 18px; font-size: calc(30px * var(--lesson-scale, 1)); line-height: 1.2; font-weight: 400; letter-spacing: -.02em; color: var(--text-primary); scroll-margin-top: calc(var(--header-height) + 24px); }
.lesson-subsection { margin: 36px 0 14px; font-size: calc(20px * var(--lesson-scale, 1)); line-height: 1.3; font-weight: 500; color: var(--text-primary); }

.lesson-list, .lesson-steps ol, .lesson-selfcheck ol, .lesson-sources ol { margin: 0 0 24px; padding-left: 22px; }
.lesson-list li, .lesson-steps li, .lesson-selfcheck li { margin-bottom: 10px; }
.lesson-list-heading, .lesson-steps-title { margin: 32px 0 10px; font-size: calc(16px * var(--lesson-scale, 1)); font-weight: 500; color: var(--text-primary); }

/* Rubrikalar — chap chiziq bilan, quti emas */
.lesson-abstract, .lesson-tldr, .lesson-note, .lesson-pitfall, .lesson-mnemonic, .lesson-case, .lesson-selfcheck, .lesson-definition, .lesson-steps {
  margin: 32px 0; padding-left: 20px; border-left: 1px solid var(--border-strong);
}
.lesson-pitfall { border-left-color: var(--danger); }
.lesson-abstract { border-left-color: var(--accent); }
.lesson-abstract-title { margin: 0 0 10px; font-size: calc(20px * var(--lesson-scale, 1)); font-weight: 500; color: var(--text-primary); }
.lesson-abstract p, .lesson-tldr p, .lesson-note p, .lesson-pitfall p, .lesson-mnemonic p, .lesson-case p { margin: 0 0 12px; }
.lesson-abstract > :last-child, .lesson-tldr > :last-child, .lesson-note > :last-child, .lesson-pitfall > :last-child, .lesson-mnemonic > :last-child, .lesson-case > :last-child, .lesson-selfcheck > :last-child, .lesson-steps > :last-child { margin-bottom: 0; }

.lesson-badge { display: block; margin-bottom: 8px; font-size: 11px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--text-tertiary); }
.lesson-pitfall-badge { color: var(--danger); }
.lesson-case-badge, .lesson-mnemonic-badge, .lesson-tldr-badge { color: var(--text-tertiary); }
.lesson-mnemonic-key { font-weight: 500; color: var(--text-primary); }
.lesson-case-question { font-weight: 500; color: var(--text-primary); }
.lesson-selfcheck-q { font-weight: 500; color: var(--text-primary); }
/* Lotincha va inglizcha nom atamaning OSTIDA turadi, yonida emas. Inline
   qolsa `dt` matniga yopishib qoladi va «Epistaksisepistaxis» bo'lib
   o'qiladi — 2026-09-08 refaktorida `display: block` tushib qolgan edi. */
.lesson-definition-meta { display: block; margin-top: 2px; font-size: 13px; font-weight: 400; color: var(--text-tertiary); }

.lesson-reveal { margin-top: 8px; }
.lesson-reveal summary { min-height: 44px; display: flex; align-items: center; color: var(--accent); font-size: 14px; font-weight: 500; cursor: pointer; list-style: none; }
.lesson-reveal summary::-webkit-details-marker { display: none; }
.lesson-reveal summary:focus-visible { outline-offset: 2px; }

/* Asosiy raqamlar — yig'ilmaydi, hamma qator ochiq (spec: bosib ochish
   ikkinchi ish bo'lardi). */
.lesson-keyfacts { margin: 40px 0; }
.lesson-keyfact { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: baseline; padding: 14px 0; border-top: 1px solid var(--border-subtle); }
.lesson-keyfact:last-child { border-bottom: 1px solid var(--border-subtle); }
.lesson-keyfact dt { margin: 0; font-size: 13px; color: var(--text-tertiary); }
.lesson-keyfact dd { margin: 0; font-size: calc(17px * var(--lesson-scale, 1)); color: var(--text-primary); font-variant-numeric: tabular-nums; }

/* Rasm va jadval */
.lesson-figure { margin: 32px 0; }
.lesson-figure img { display: block; width: 100%; border-radius: 8px; }
.lesson-figure figcaption { margin-top: 12px; font-size: 13px; line-height: 1.5; color: var(--text-tertiary); }
.lesson-figure-source { display: block; margin-top: 4px; color: var(--text-tertiary); }

.lesson-table { margin: 32px 0; }
.lesson-table figcaption { margin-bottom: 12px; font-size: 13px; color: var(--text-tertiary); }
.lesson-table-scroll { overflow-x: auto; }
.lesson-table table { width: 100%; border-collapse: collapse; font-size: calc(15px * var(--lesson-scale, 1)); }
.lesson-table th, .lesson-table td { padding: 12px 16px 12px 0; border-bottom: 1px solid var(--border-subtle); text-align: left; vertical-align: top; line-height: 1.45; }
.lesson-table th { font-size: 11px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--text-tertiary); border-bottom-color: var(--border-strong); }

/* Manbalar va mashq */
.lesson-sources { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border-subtle); }
.lesson-sources h2 { margin: 0 0 14px; font-size: 12px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--text-tertiary); }
.lesson-sources li { margin-bottom: 8px; font-size: 14px; line-height: 1.55; color: var(--text-secondary); }

.lesson-practice { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border-subtle); }
.lesson-practice h2 { margin: 0 0 8px; font-size: 24px; font-weight: 400; letter-spacing: -.02em; }
.lesson-practice-lead { margin: 0 0 18px; color: var(--text-secondary); font-size: 15px; }
.lesson-practice-stage { margin-top: 20px; }
.lesson-practice-card { padding: 20px 22px; border: 1px solid var(--border-strong); border-radius: var(--radius-card); }
.lesson-practice-step { display: block; margin-bottom: 10px; font-size: 12px; color: var(--text-tertiary); font-family: var(--font-mono); }
.lesson-practice-q { margin: 0 0 14px; font-size: 17px; line-height: 1.5; color: var(--text-primary); }
.lesson-practice-a { margin-bottom: 16px; color: var(--text-body); line-height: 1.6; }
.lesson-practice-a p { margin: 0 0 10px; }
.lesson-practice-actions { display: flex; gap: 10px; }
.lesson-practice-score { margin: 0 0 14px; font-size: 16px; color: var(--text-primary); }

@media (max-width: 900px) {
  .lesson-body { font-size: calc(17px * var(--lesson-scale, 1)); line-height: 1.7; }
  .lesson-lead { margin-top: 28px; font-size: calc(18px * var(--lesson-scale, 1)); }
  .lesson-chapter, .lesson-section { margin: 36px 0 12px; font-size: calc(24px * var(--lesson-scale, 1)); }
  .lesson-keyfact { grid-template-columns: 1fr; gap: 4px; padding: 12px 0; }
  .lesson-keyfact dd { font-size: calc(16px * var(--lesson-scale, 1)); }
}