/* Same Polish Review design tokens; fluid course layouts. */
.new-ui.case-viewport .session-controls::before,.new-ui.case-viewport .session-controls::after{content:"";width:44px;height:44px;flex:none}
.new-ui.case-viewport #back-to-setup,.new-ui.case-viewport #case-home-button{position:fixed;top:var(--case-nav-top);width:44px;height:44px;z-index:25}
.new-ui.case-viewport #back-to-setup{left:var(--case-nav-left)}
.new-ui.case-viewport #case-home-button{left:var(--case-nav-right)}
.new-ui .feedback-actions:has(>button:nth-child(2)){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.new-ui .feedback-actions:has(>button:nth-child(2))>button{width:100%;height:100%;min-height:48px;margin:0;padding:12px 10px;line-height:1.35}
@media(max-width:900px){
 .new-ui :is(#focus-select-menu,#next-focus-menu) .choice-option{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:4px 8px;min-height:44px;padding:6px 10px}
 .new-ui :is(#focus-select-menu,#next-focus-menu) .choice-name{white-space:nowrap}
 .new-ui :is(#focus-select-menu,#next-focus-menu) .choice-badge{grid-column:1/-1;justify-self:start;align-self:start;margin-top:0;padding:3px 6px}
}
/* Desktop case content and the fixed composer share the same centered column.
   Mobile keeps its existing full-width dock and case layout. */
@media(min-width:901px){
 .new-ui #session-panel{max-width:760px;margin-inline:auto}
 body.new-ui.case-viewport #main-content{padding-bottom:calc(var(--desktop-dock-height,100px) + 40px)}
 .new-ui .answer-dock{left:var(--case-column-left);width:var(--case-column-width);transform:none;padding:0;background:transparent}
 .new-ui .answer-dock .record-status,.new-ui .answer-dock .audio-review{margin-inline:0}
}
@media(max-width:600px){body.new-ui.setup-viewport #main-content{overflow-y:auto;overflow-x:hidden;overscroll-behavior-y:contain}}
.new-ui .skill-reason{margin:6px 0 0;color:var(--muted);font-size:12px;font-weight:400;line-height:1.45;overflow-wrap:anywhere}
.new-ui .level-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.new-ui .level-cell{min-width:0;flex-wrap:wrap}
.new-ui .level-cell>.skill-reason,.new-ui .level-cell>.delivery-scorecard,.new-ui .level-cell>.delivery-info{flex-basis:100%;width:100%}
.new-ui .delivery-cell{grid-column:1/-1}
.new-ui .delivery-scorecard{display:flex;gap:8px 16px;flex-wrap:wrap;margin-top:8px;font-size:12px;line-height:1.5}
.new-ui .delivery-measure{max-width:100%;overflow-wrap:anywhere}
.new-ui .delivery-info{flex-basis:100%;color:var(--muted)}
/* A2: the inline measures collapse into a small "See details" control. The
   card keeps the skill name and level only. */
.new-ui .delivery-details-trigger{position:absolute;right:12px;bottom:8px;margin:0;padding:2px 0;font-size:12px;font-weight:400;min-height:24px}
.new-ui .delivery-cell{position:relative;display:grid;grid-template-columns:minmax(0,1fr) max-content;align-items:center;gap:2px 12px;padding:9px 12px 34px;text-align:left;font-size:13px}
.new-ui .delivery-cell>.level-value{margin-top:0;text-align:left;white-space:nowrap}
@media(max-width:600px){
 .new-ui .feedback-body .level-row{grid-template-columns:minmax(0,1fr) max-content;column-gap:12px}
 .new-ui .level-cell{display:grid;grid-column:1/-1;grid-template-columns:subgrid;align-items:center;gap:2px 12px;font-size:13px}
 .new-ui .level-cell>.level-value{margin-top:0;text-align:left;white-space:nowrap}
}
.delivery-details-overlay{position:fixed;inset:0;z-index:70;display:flex;align-items:flex-end;justify-content:center;background:rgba(4,12,8,.5)}
.delivery-details-sheet{width:min(100%,520px);max-height:80vh;overflow-y:auto;padding:18px 20px calc(20px + env(safe-area-inset-bottom));border:1px solid var(--line);border-radius:18px 18px 0 0;background:var(--surface);color:var(--text);box-shadow:0 -14px 40px var(--shade)}
.delivery-details-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.delivery-details-title{margin:0;font-size:17px;font-weight:700}
.delivery-details-close{flex:none;width:44px;height:44px;min-width:44px;border:1px solid var(--line);border-radius:50%;background:var(--surface-2);color:var(--text);font-size:22px;line-height:1}
.delivery-details-close:hover{border-color:var(--accent)}
.delivery-details-list{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 16px;margin:0;padding:14px 0 2px;border-top:1px solid var(--line)}
.delivery-details-list dt{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.delivery-details-list dd{margin:0;text-align:right;font-size:13px;font-weight:650;line-height:1.5;font-variant-numeric:tabular-nums}
.delivery-details-empty{margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.5}
@media(min-width:601px){.delivery-details-overlay{align-items:center}.delivery-details-sheet{border-radius:18px}}
body.delivery-details-open{overflow:hidden}
/* Desktop feedback stays compact; the details dialog follows the case column. */
@media(min-width:901px){
 .new-ui .feedback-body .level-row:has(.delivery-cell){grid-template-columns:repeat(4,minmax(0,1fr))}
 .new-ui .feedback-body .level-cell{display:grid;grid-column:auto;grid-template-columns:minmax(0,1fr);grid-template-rows:34px auto;align-items:start;justify-items:center;gap:4px;padding:9px 10px 34px;text-align:center;font-size:13px}
 .new-ui .feedback-body .level-label{line-height:1.3}
 .new-ui .feedback-body .level-value{margin:0;text-align:center;white-space:nowrap}
 .new-ui .delivery-details-sheet{position:fixed;left:calc(var(--case-column-left) + var(--case-column-width)/2);top:50%;transform:translate(-50%,-50%);width:min(520px,calc(var(--case-column-width) - 32px))}
}
@media(max-width:600px){.new-ui .level-row{grid-template-columns:1fr}.new-ui .delivery-scorecard{gap:6px 12px}.new-ui .skill-reason{font-size:12px}}
.new-ui .setup-panel{max-width:660px;padding-top:0}.new-ui .setup-heading h1{line-height:1.12}.new-ui .setup-heading h1 span{display:block;white-space:nowrap;font-size:clamp(1.65rem,8vw,3.6rem)}
.new-ui .recommended-button{white-space:nowrap;overflow:hidden;font-size:clamp(13px,3.7vw,19px);gap:8px}.new-ui .recommended-label{min-width:0;text-overflow:ellipsis;overflow:hidden}
.new-ui .recommendation-focus{display:block;margin:12px 0 22px;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.new-ui .level-up-description{margin:10px 0 0;font-size:13px;line-height:1.5;color:var(--accent-text);font-weight:650;overflow-wrap:break-word}
.new-ui .level-up-logo{display:block;flex:none;width:100px;height:28px}
.new-ui .level-up-word{fill:#242424}
:root[data-theme="dark"] .new-ui .level-up-word{fill:var(--text)}
.new-ui .surprise-button{min-height:44px;border-color:var(--accent);color:var(--accent-text);background:transparent;margin:0 0 24px;padding:10px 22px;border-radius:999px}
.new-ui .setup-fields{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:24px}.new-ui #availability-note{display:none}
.course-map{display:grid;gap:12px;margin-top:8px}.course-topic{border:1px solid var(--line);border-radius:18px;background:var(--surface);overflow:hidden;min-width:0}
.course-topic-heading{padding:16px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;min-height:70px;cursor:pointer;list-style:none}.course-topic-heading::-webkit-details-marker,.course-difficulty-heading::-webkit-details-marker{display:none}
.course-topic-name{font-weight:650;font-size:15px;line-height:1.45;overflow-wrap:anywhere}.course-topic-meta{display:flex;flex-direction:column;gap:5px;text-align:right;align-self:center;max-width:120px}
.course-level{font-size:12px;font-weight:650;line-height:1.35;color:var(--accent-text);white-space:nowrap}.course-level[data-level=missing],.course-level[data-level=partial]{color:var(--muted)}.course-level[data-level=strong]{font-weight:750}.course-level[data-level=client-ready]{font-weight:800}
.course-level[data-level]{color:var(--level-color,var(--accent-text))}
.course-count{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}.course-topic-heading .coverage-track{grid-column:1/-1;width:100%;display:block;height:4px;margin:0}.course-topic-heading .coverage-fill{height:100%;display:block}
.course-soon{opacity:.65}.course-soon .persona-badge{align-self:center}.course-difficulty{margin:0 12px 12px;background:var(--surface-2);border-radius:12px;overflow:hidden}.course-difficulty-heading{display:flex;gap:10px;align-items:center;min-height:48px;padding:12px;cursor:pointer;font-weight:650;font-size:14px;list-style:none}.course-difficulty-heading>span:first-child{margin-right:auto}.course-complete{font-size:11px;color:var(--accent-text);white-space:nowrap}
.course-question{display:grid;grid-template-columns:18px minmax(0,1fr) 88px 74px;gap:8px;align-items:center;margin:0 12px;padding:10px 0;border-top:1px solid var(--line)}
.course-check{color:var(--accent-text)}.course-question-title{background:none;border:0;color:var(--text);font-size:13px;font-weight:550;text-align:left;line-height:1.45;padding:4px 0;min-height:44px;overflow-wrap:anywhere;min-width:0}
.course-question-action{min-height:44px;min-width:0;white-space:nowrap;border-radius:999px;font-size:12px;padding:8px;border-color:var(--accent);color:var(--accent-text);background:transparent}.course-question>.course-level{font-size:11px;white-space:normal}.course-question>.course-level[data-level=not-assessed]{visibility:hidden}
.course-history{margin-top:24px}.course-history>summary{cursor:pointer;min-height:44px;line-height:44px}.course-history .history-list{margin-top:12px}.history-group-label{font-size:13px;line-height:1.5;color:var(--accent-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-row{min-height:64px;width:100%;text-align:left}.history-heading{display:flex;justify-content:space-between;gap:12px;margin-top:8px}.weak-answer-row{display:grid;grid-template-columns:minmax(0,1fr) 88px 74px;gap:8px;align-items:center;border-bottom:1px solid var(--line);padding:10px 0}.weak-answer-row>.course-level{white-space:normal;font-size:11px}.weakest-area{margin-top:22px;font-size:14px;line-height:1.5}.weakest-area button{min-height:44px}
.case-skip{display:block;margin-left:auto;min-height:44px;padding:8px 0;font-size:14px}.new-ui .session-summary{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.new-ui #filters-button{display:none}.new-ui .case-home-button{display:inline-grid}.new-ui .feedback-actions{display:flex;flex-wrap:wrap;gap:12px}.new-ui .feedback-actions button{min-height:44px}.new-ui .feedback-card>button{margin:16px 8px 0 0;min-height:44px}.new-ui .busy-status{color:var(--accent-text)}.busy-status:before{content:'';display:inline-block;width:10px;height:10px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;margin-right:8px;animation:busy-turn 1s linear infinite}.record-wave{display:flex;gap:3px;align-items:center;justify-content:center;height:28px;margin:8px 0;color:var(--accent-text)}.wave-bar{height:24px;width:2px;background:currentColor;border-radius:99px;transform-origin:center;transition:transform 80ms linear}.record-dot{width:8px;height:8px;border-radius:50%;background:currentColor;animation:record-pulse 1s ease-in-out infinite}
@keyframes busy-turn{to{transform:rotate(360deg)}}@keyframes record-pulse{50%{opacity:.3}}
@media(max-width:600px){.new-ui .course-question{grid-template-columns:16px minmax(0,1fr) 76px 61px;gap:6px;margin:0 10px}.new-ui .course-question-action{font-size:11px;padding:8px 5px}.new-ui .course-topic-heading{padding:14px;gap:10px}.new-ui .course-topic-name{font-size:14px}.new-ui .course-topic-meta{max-width:105px}.new-ui .setup-heading{margin-bottom:26px}.new-ui .setup-panel{padding-top:4px}.new-ui .level-row{grid-template-columns:1fr}.new-ui .weak-answer-row{grid-template-columns:minmax(0,1fr) 76px 61px;gap:6px}.new-ui .topbar .icon-button,.new-ui .topbar .back-button{width:44px;height:44px;flex:none}.new-ui .topbar{gap:10px}.new-ui .wordmark{flex:1;font-size:clamp(11px,3vw,13px)}.new-ui .session-controls .session-persona-picker{flex:1;max-width:none}.new-ui .session-persona-picker .persona-trigger{max-width:none;width:100%}.new-ui .session-controls{gap:8px}.new-ui .end-actions button{white-space:nowrap;font-size:13px}}
@media(prefers-reduced-motion:reduce){.wave-bar{transition:none}.record-dot,.busy-status:before{animation:none}}

.course-topic[open]>.course-difficulty,.course-difficulty[open]>.course-question,.course-history[open]>.history-list{animation:course-reveal 150ms ease-out}@keyframes course-reveal{from{opacity:0;transform:translateY(-3px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.course-topic[open]>.course-difficulty,.course-difficulty[open]>.course-question,.course-history[open]>.history-list{animation:none}}

/* Founder refinements: shared type, compact actions and earned progress. */
.new-ui .setup-heading h1 span{white-space:normal;font-size:clamp(1.65rem,6.9vw,3rem)}
.new-ui .recommendation-focus{white-space:normal;overflow:visible;text-overflow:clip;line-height:1.5;margin:12px 0 18px}
.new-ui .surprise-button{width:100%;min-height:53px;display:flex;align-items:center;justify-content:center;gap:10px;border-radius:13px;font-size:clamp(13px,3.7vw,19px);margin-bottom:0}
.new-ui .recommended-button,.new-ui .surprise-button{height:53px;min-height:53px}
.new-ui .setup-fields .persona-trigger,.new-ui .setup-fields .choice-trigger{height:56px;min-height:56px;padding-top:0;padding-bottom:0;font-size:14px;line-height:1.3}
.new-ui .choose-case-heading{color:var(--accent-text);font-size:18px;margin:26px 0 14px;font-weight:700}
.course-topic-heading{grid-template-columns:minmax(0,1fr) auto 18px;align-items:center;gap:8px}
.course-chevron{width:18px;height:18px;color:var(--accent-text);flex:none;transition:transform .15s ease}
details[open]>.course-topic-heading>.course-chevron,details[open]>.course-difficulty-heading>.course-chevron{transform:rotate(180deg)}
.course-status{font-size:12px;font-weight:600;white-space:nowrap;color:var(--muted)}
.new-ui .course-question{grid-template-columns:14px minmax(0,1fr) 74px;gap:8px}
.course-question-controls{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;min-width:0}
.new-ui .course-question-action{padding:5px 9px;min-height:32px;width:74px;font-size:11px;border-radius:999px}
.course-check{align-self:start;line-height:1.45;padding-top:12px;font-size:15px}
.course-level,.course-level[data-level=strong],.course-level[data-level=client-ready],.new-ui .level-value,.new-ui .level-indicator{font-family:inherit;font-weight:700;font-style:normal}
.new-ui .main-case-skip{margin:8px 0 4px auto;min-height:32px;padding:5px 0}
.new-ui .main-case-skip+.cover-points{margin-top:0}
.new-ui .busy-status{font-weight:700}
.new-ui .record-status.answer-notice{color:#b45309;border-color:#c26516}
.answer-notice-hint{display:block;margin-top:5px;font-size:inherit;font-weight:600}
:root[data-theme="dark"] .new-ui .record-status.answer-notice{color:#e8913f;border-color:#cd7727}
.new-ui .brand-mark{width:30px;height:30px;flex:none}
/* D1: the moon/sun toggle uses a rendered icon box the same size as the
   brand mark so it never shifts the topbar; the button keeps a 44px target. */
.new-ui .theme-toggle{width:44px;height:44px;min-width:44px}
.new-ui .theme-toggle>svg{width:30px;height:30px;display:block}
:root[data-theme="dark"] .new-ui .theme-toggle{background:#1b3427;border-color:#476154;color:#9dc4b0}
:root[data-theme="dark"] .new-ui .theme-toggle>svg{width:20px;height:20px;stroke-width:1.35}
.new-ui .sidebar-theme-glyph{display:block}
.new-ui .sidebar-theme-glyph svg{width:18px;height:18px;display:block}
.new-ui .wordmark{font-size:19px}
.new-ui .side-brand{font-size:19px}
.skill-group>.section-heading{margin:22px 0 5px;font-size:16px}
.skill-group .skill-subtitle{margin:0 0 12px}
.skill-building{font-size:12px;font-weight:600;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.skill-label{min-width:0;flex:none;white-space:nowrap}
.new-ui .dimension-row{gap:8px;min-width:0;align-items:center}
.new-ui .dimension-row>.course-level{font-size:12px}
.knowledge-hint{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:9px 0 0}
.history-group-label{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:14px 16px;margin:0;white-space:normal;overflow-wrap:break-word;cursor:pointer;list-style:none}
.history-group-label::-webkit-details-marker{display:none}
.history-topic-name{min-width:0}
.history-topic[open]>.history-group-label>.course-chevron{transform:rotate(180deg)}
.history-topic+.history-topic{border-top:1px solid var(--line)}
/* History agent hook: the hint shows only while the outer History details is
   closed, and hides once it is open. Nested topic chevrons are owned there. */
.history-expand-hint{display:inline-block;margin-top:2px;padding:4px 8px;border:1px solid var(--line);border-radius:6px;font-size:12px;color:var(--muted)}
.course-history[open]+.history-expand-hint{display:none}
.new-ui :is(#progress-view,#leaderboard-view,#profile-view) .view-heading{margin:0 0 28px;padding:0}
.new-ui :is(#progress-view,#leaderboard-view,#profile-view) .view-heading h1{margin:0 0 10px;padding:0;text-align:left;text-indent:0}
.new-ui :is(#progress-view,#leaderboard-view,#profile-view) .view-heading p{margin:0;padding:0;text-align:left;text-indent:0}
.new-ui .answer-composer.is-recording{gap:9px}
.new-ui .answer-composer .record-wave{flex:1;min-width:0;height:44px;margin:0;justify-content:stretch;overflow:hidden;gap:3px}
.new-ui .answer-composer .wave-bar{flex:1;max-width:5px;min-width:2px;height:28px}
.record-cancel{width:32px;height:44px;flex:none;border:0;background:none;color:var(--accent-text);font-size:28px;padding:0}
.new-ui .answer-composer.is-recording .composer-controls{gap:6px}
.new-ui .answer-composer.is-recording .record-timer{font-size:10px}
.new-ui .persona-badge{font-family:inherit;font-size:11px;line-height:1.3;padding:3px 8px;border-radius:999px;background:var(--badge-bg);color:var(--badge-text);white-space:nowrap}
@media(max-width:600px){
 .new-ui .wordmark{font-size:clamp(13px,3.8vw,15px);letter-spacing:.10em}
 .new-ui .topbar{gap:8px}
 .new-ui .brand-mark{width:29px;height:29px}
 .new-ui .theme-toggle>svg{width:29px;height:29px}
 .new-ui .course-topic-meta{max-width:115px}
 .new-ui .dimension-list{padding-left:12px;padding-right:12px}
 .new-ui .skill-label{font-size:13px}
 .new-ui .dimension-row>.course-level{font-size:12px}
 .new-ui .skill-building{font-size:11px}
}

/* Learn this concept: the entry inside feedback shows only when the private
   lesson exists. The reading screen fetches its text on demand; nothing here
   is bundled, stored, or precached. */
.new-ui .lesson-entry{margin-top:18px;display:grid;gap:8px}
.new-ui .lesson-open-button{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:53px;padding:13px 18px;border:1px solid var(--accent);border-radius:13px;background:var(--surface-2);color:var(--accent-text);font-size:15px;font-weight:700;line-height:1.35;text-align:left}
.new-ui .lesson-open-button:hover:not(:disabled){border-color:var(--accent-hover)}
.new-ui .lesson-open-label{min-width:0;overflow-wrap:anywhere}
.new-ui .lesson-open-arrow{flex:none;font-size:17px;line-height:1}
.new-ui .lesson-entry-note{margin:0;font-size:12px;line-height:1.5;color:var(--muted)}
.new-ui .lesson-entry-error{color:var(--accent-text)}
/* A4: the strong-answer reveal keeps its existing open-on-demand rule, with a
   tinted card and a rotating arrow. The revealed answer matches the "Your
   answer" text size. */
.new-ui .strong-answer-card{margin-top:18px;padding:0;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:12px;background:var(--surface-2);overflow:hidden}
.new-ui .strong-answer-card>summary{display:flex;align-items:center;gap:10px;min-height:44px;padding:12px 14px;cursor:pointer;list-style:none}
.new-ui .strong-answer-card>summary::-webkit-details-marker{display:none}
.new-ui .strong-answer-card>summary::after{content:none}
.new-ui .strong-answer-title{display:flex;flex-direction:column;gap:2px;min-width:0}
.new-ui .strong-answer-label{font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-text)}
.new-ui .strong-answer-note{font-size:12px;font-weight:400;color:var(--muted)}
.new-ui .strong-answer-arrow{margin-left:auto;flex:none;font-size:16px;line-height:1;color:var(--accent-text);transition:transform .15s ease}
.new-ui .strong-answer-card[open] .strong-answer-arrow{transform:rotate(90deg)}
/* The revealed answer matches the "Your answer" text size exactly. */
.new-ui .strong-answer-body{margin:0;padding:0 14px 14px;color:var(--text);font:inherit;font-size:inherit;line-height:1.58;white-space:pre-wrap}
@media(prefers-reduced-motion:reduce){.new-ui .strong-answer-arrow{transition:none}}

/* A5: the terminal surface is inline feedback, not a separate completion
   screen. Next case is the primary action. */
.new-ui .end-actions{flex-wrap:wrap}
.new-ui .end-actions .primary-button,.new-ui .end-actions .secondary-button{min-height:44px}

.lesson-screen{position:fixed;inset:0;z-index:60;display:flex;flex-direction:column;background:var(--bg);color:var(--text)}
.lesson-topbar{flex:none;display:flex;align-items:center;gap:12px;padding:calc(9px + env(safe-area-inset-top)) clamp(16px,4vw,30px) 9px;border-bottom:1px solid var(--line);background:var(--surface)}
.lesson-chapter{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-text)}
.lesson-scroll{flex:1;min-width:0;min-height:0;overflow-x:hidden;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.lesson-article{width:min(100%,700px);margin:0 auto;padding:26px clamp(18px,5vw,34px) 34px}
.lesson-title{margin:0 0 20px;font-size:clamp(1.5rem,5.2vw,2.1rem);line-height:1.2;font-weight:700;letter-spacing:-.02em;overflow-wrap:anywhere}
.lesson-body{font-size:17px;line-height:1.72;overflow-wrap:anywhere}
.lesson-body p{margin:0 0 18px}
.lesson-body h1,.lesson-body h2,.lesson-body h3,.lesson-body h4,.lesson-body h5,.lesson-body h6{margin:28px 0 10px;line-height:1.28;font-weight:700;letter-spacing:-.01em}
.lesson-body h1,.lesson-body h2{font-size:1.3rem}
.lesson-body h3{font-size:1.15rem}
.lesson-body h4,.lesson-body h5,.lesson-body h6{font-size:1.02rem}
.lesson-body ul,.lesson-body ol{margin:0 0 18px;padding-left:24px}
.lesson-body li{margin:0 0 9px}
.lesson-body li::marker{color:var(--accent-text)}
.lesson-body code{padding:1px 5px;border-radius:6px;background:var(--surface-2);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}
.lesson-deep{margin-top:30px;padding-top:18px;border-top:1px solid var(--line)}
.lesson-deep-summary{display:flex;align-items:center;min-height:44px;cursor:pointer;color:var(--accent-text);font-size:15px;font-weight:700}
.lesson-deep-body{margin-top:14px}
.lesson-actions{flex:none;display:flex;justify-content:center;padding:11px clamp(16px,5vw,34px) calc(11px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--surface)}
.lesson-retry{width:100%;max-width:420px}
body.lesson-open{overflow:hidden}

/* Wide lesson tables scroll inside their own frame so the page never does. */
.lesson-table-scroll{max-width:100%;margin:0 0 18px;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--surface);-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain}
.lesson-table-scroll table{width:100%;min-width:520px;border-collapse:collapse;font-size:15px;line-height:1.5}
.lesson-table-scroll th,.lesson-table-scroll td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.lesson-table-scroll th{background:var(--surface-2);font-weight:700;white-space:nowrap}
.lesson-table-scroll tr:last-child td{border-bottom:0}
@media(max-width:600px){
 .lesson-article{padding:22px 18px 30px}
 .lesson-body{font-size:17px;line-height:1.7}
 .lesson-table-scroll table{min-width:460px;font-size:14px}
 .lesson-table-scroll th,.lesson-table-scroll td{padding:9px 10px}
}