.course-module{--course-bg:var(--panel,#fff);--course-ink:var(--ink,#111);--course-muted:var(--muted,#666);--course-line:var(--line,#ddd);--course-soft:var(--soft,#f3f3f3);--course-on:var(--on,#fff);color:var(--course-ink);display:grid;gap:22px;min-width:0}
.course-module *{box-sizing:border-box}.course-module p{margin:0 0 16px}.course-module button,.course-module input{font-family:inherit}.course-module button{cursor:pointer}.course-module button:disabled{cursor:default;opacity:.55}.course-module button:focus-visible,.course-module a:focus-visible,.course-module input:focus-visible,.course-module summary:focus-visible{outline:3px solid var(--course-ink);outline-offset:4px}.course-module h2{font-size:32px;letter-spacing:-.045em;line-height:1.15;margin:8px 0 12px}.course-module h3{margin:0 0 16px;font-size:20px;line-height:1.35;letter-spacing:-.02em}.course-heading{display:flex;justify-content:space-between;gap:24px;align-items:center}.course-heading>div{max-width:680px}.course-heading p{color:var(--course-muted);margin-bottom:0;max-width:64ch}.course-overline{font-size:10px;letter-spacing:.14em;font-weight:750;display:block;color:var(--course-muted)}.course-header-mark{font-family:Georgia,serif;font-size:72px;line-height:1;text-align:right;letter-spacing:-.06em}.course-header-mark>span{display:block;font:8px/1.5 system-ui,sans-serif;letter-spacing:.12em;margin-top:8px;white-space:nowrap}.course-small{font-size:12px;line-height:1.6}.course-muted{color:var(--course-muted)}.course-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.course-between{justify-content:space-between}.course-selection{display:grid;grid-template-columns:1fr 1fr;gap:14px}.course-select{display:flex;flex-direction:column;align-items:flex-start;text-align:left;gap:10px;border:1px solid var(--course-line);border-radius:14px;padding:20px;background:var(--course-bg);color:var(--course-ink);min-height:178px;position:relative;overflow-wrap:anywhere}.course-select>strong{font-size:20px;letter-spacing:-.02em;line-height:1.3}.course-select>span:not(.course-overline):not(.course-select-meta){font-size:13px;line-height:1.5}.course-module .course-select[aria-pressed=true]{background:var(--course-ink);color:var(--course-bg);border-color:var(--course-ink)}.course-select[aria-pressed=true] .course-overline,.course-select[aria-pressed=true] .course-select-meta{color:inherit;opacity:.8}.course-select-meta{font-size:11px;color:var(--course-muted);margin-top:auto}.course-mode-tabs{padding-bottom:16px;border-bottom:1px solid var(--course-line)}.course-button{background:var(--course-bg);color:var(--course-ink);border:1px solid var(--course-line);border-radius:8px;min-height:44px;padding:10px 14px;text-align:left;font-size:13px;line-height:1.4;overflow-wrap:anywhere}.course-module .course-primary,.course-module .course-button[aria-pressed=true]{background:var(--course-ink);color:var(--course-bg);border-color:var(--course-ink)}.course-button:hover:not(:disabled){background:var(--course-soft);color:var(--course-ink)}.course-module .course-primary:hover:not(:disabled){filter:contrast(.8);background:var(--course-ink);color:var(--course-bg)}.course-status:empty{display:none}.course-status{margin:0;padding:12px 14px;border:1px solid var(--course-line);border-left:3px solid var(--course-ink);font-size:13px}.course-learning-layout{display:grid;grid-template-columns:minmax(210px,280px) minmax(0,1fr);align-items:start;gap:24px}.course-syllabus{min-width:0;padding:0 0 16px}.course-syllabus-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.course-syllabus-heading h3{margin:0;font-size:16px}.course-syllabus-heading>span{font-size:11px;font-variant-numeric:tabular-nums;color:var(--course-muted)}.course-syllabus>p{margin:10px 0 14px;font-size:11px}.course-lesson-list{display:grid;gap:6px}.course-lesson-pick{display:grid;grid-template-columns:23px minmax(0,1fr) 15px;align-items:center;gap:10px;text-align:left;padding:10px;background:transparent;border:1px solid transparent;color:var(--course-ink);border-radius:7px;min-height:46px;font-size:12px;line-height:1.5;overflow-wrap:anywhere}.course-module .course-lesson-pick[aria-pressed=true]{background:var(--course-soft);border-color:var(--course-line);color:var(--course-ink);font-weight:650}.course-lesson-pick:hover{background:var(--course-soft)}.course-lesson-number{font-size:10px;font-variant-numeric:tabular-nums;color:var(--course-muted)}.course-lesson-done{font-size:12px}.course-syllabus-actions{margin-top:18px;padding-top:18px;border-top:1px solid var(--course-line);display:grid;gap:8px}.course-syllabus-actions button{font-size:11px;padding:8px 10px}.course-lesson-main{display:grid;gap:18px;min-width:0}.course-panel{border:1px solid var(--course-line);border-radius:14px;padding:24px;background:var(--course-bg);min-width:0;overflow-wrap:anywhere}.course-module .course-lesson-title{font-size:28px;letter-spacing:-.035em;margin:12px 0}.course-summary{color:var(--course-muted);font-size:15px}.course-concepts{padding-left:20px;margin:18px 0 22px;line-height:1.8;font-size:14px}.course-concepts li{padding-left:4px;margin-bottom:8px}.course-examples{border-left:2px solid var(--course-ink);padding:4px 0 4px 18px;margin:22px 0}.course-examples>.course-overline{margin-bottom:10px}.course-examples p{font-family:Georgia,serif;font-size:18px;line-height:1.7;white-space:pre-line;margin:8px 0}.course-study-links{padding-top:16px;border-top:1px solid var(--course-line)}.course-study-links>.course-button{flex:1;font-size:12px}.course-exercise h3{margin-top:12px}.course-options{border:0;margin:0;padding:0;min-width:0}.course-options legend{font-size:16px;line-height:1.7;margin:10px 0 16px;padding:0;white-space:pre-line;width:100%;max-width:100%}.course-options:disabled{opacity:1}.course-option{position:relative;display:flex;gap:12px;align-items:center;border:1px solid var(--course-line);background:var(--course-bg);padding:12px;margin:8px 0;border-radius:8px;cursor:pointer;font-size:13px;line-height:1.5;min-height:50px;overflow-wrap:anywhere}.course-option:has(input:focus-visible){outline:3px solid var(--course-ink);outline-offset:3px}.course-option input{appearance:none;position:absolute;opacity:0;width:1px;height:1px;min-width:0;min-height:0;margin:0;padding:0;border:0}.course-option-letter{font-size:10px;font-weight:650;display:grid;place-items:center;border:1px solid var(--course-line);border-radius:4px;min-width:23px;width:23px;height:23px;flex-shrink:0}.course-option-selected{border-color:var(--course-ink);background:var(--course-soft)}.course-option-selected .course-option-letter{background:var(--course-ink);color:var(--course-bg);border-color:var(--course-ink)}.course-options:disabled .course-option{cursor:default}.course-exercise-actions{margin:18px 0 12px}.course-feedback{background:var(--course-soft);border-left:2px solid var(--course-ink);padding:16px;margin:20px 0;font-size:14px}.course-feedback p{margin:10px 0 0}.course-time{font-size:12px;font-variant-numeric:tabular-nums;border:1px solid var(--course-line);border-radius:6px;padding:4px 8px}.course-original-source h3{margin-top:7px;margin-bottom:12px}.course-video-slot{margin:18px 0 12px;min-width:0}.course-video-load{display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center;aspect-ratio:16/8;width:100%;background:var(--course-soft);border:1px solid var(--course-line);border-radius:9px;color:var(--course-ink);padding:24px;text-align:center}.course-video-load strong{font-size:14px}.course-video-load>span:last-child{font-size:11px;max-width:36ch;line-height:1.6}.course-play{font-size:18px;border:1px solid var(--course-ink);border-radius:50%;width:46px;height:46px;display:grid;place-items:center;padding-left:3px}.course-video-frame{display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:9px;background:#111}.course-coverage{border-top:1px solid var(--course-line);padding-top:18px;margin:4px 0 0}.course-coverage>summary{font-size:12px;font-weight:600;cursor:pointer}.course-coverage[open]>summary{margin-bottom:16px}.course-coverage p{max-width:80ch}.course-assessment-layout{display:grid;gap:18px;max-width:880px;min-width:0}.course-assessment-intro h3{font-size:27px;letter-spacing:-.035em;margin:10px 0 18px}.course-assessment-intro>p{max-width:70ch;font-size:14px}.course-assessment-facts{gap:8px 18px;font-size:11px;color:var(--course-muted);margin:20px 0}.course-assessment-facts span::before{content:'· ';font-weight:700}.course-mode-choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.course-mode{display:flex;flex-direction:column;gap:8px;text-align:left;padding:18px;border:1px solid var(--course-line);border-radius:9px;background:var(--course-bg);color:var(--course-ink)}.course-mode strong{font-size:14px}.course-mode>span{font-size:12px;line-height:1.6}.course-module .course-mode[aria-pressed=true]{background:var(--course-soft);border-color:var(--course-ink);color:var(--course-ink)}.course-assessment-active h3{margin:22px 0 8px}.course-progress-track{height:4px;border-radius:4px;background:var(--course-line);margin:18px 0}.course-progress-track span{display:block;height:100%;border-radius:4px;background:var(--course-ink)}.course-question-nav{display:flex;gap:6px;flex-wrap:wrap}.course-question-pick{min-width:42px;min-height:40px;border:1px solid var(--course-line);padding:7px 9px;border-radius:6px;background:var(--course-bg);color:var(--course-ink);font-size:11px;font-variant-numeric:tabular-nums}.course-module .course-question-pick[aria-pressed=true]{background:var(--course-ink);color:var(--course-bg);border-color:var(--course-ink)}.course-passage{white-space:pre-line;line-height:1.8;margin:14px 0 18px;font-size:14px}.course-restart{margin-top:24px;border-top:1px solid var(--course-line);padding-top:16px}.course-restart summary{font-size:11px;cursor:pointer;color:var(--course-muted)}.course-restart p{margin-top:12px}.course-score{font-size:58px;line-height:1.2;font-weight:650;letter-spacing:-.045em;margin:12px 0}.course-score>span{font-size:30px;color:var(--course-muted);font-weight:400}.course-assessment-result h3{font-size:27px;margin-top:10px}.course-review-list{list-style:none;margin:0;padding:0}.course-review-list>li{border-top:1px solid var(--course-line);padding:22px 0 6px}.course-review-list>li:first-child{border-top:0}.course-review-list>li p{margin-bottom:12px}.course-result-label{font-size:10px;font-weight:600;white-space:nowrap}.course-attempt-history>summary{font-size:14px;font-weight:650;cursor:pointer}.course-attempt-history[open]>summary{margin-bottom:16px}.course-history-item{margin:0;border-top:1px solid var(--course-line);padding:14px 0}.course-history-item>summary{font-size:11px;cursor:pointer;display:flex;justify-content:space-between;gap:14px;list-style:none}.course-history-item>summary::before{content:'+';font-weight:650}.course-history-item[open]>summary::before{content:'−'}.course-history-item>summary>span{margin-right:auto}.course-history-item[open]{padding-top:18px}.course-assessment-result>.course-row{margin:16px 0}.course-module a{color:var(--course-ink);text-underline-offset:3px}
@media(max-width:800px){.course-learning-layout{grid-template-columns:minmax(170px,215px) minmax(0,1fr);gap:16px}.course-panel{padding:20px}.course-lesson-pick{font-size:11px;grid-template-columns:20px minmax(0,1fr) 12px;gap:7px;padding:9px 7px}.course-study-links{align-items:stretch}.course-study-links>.course-button{flex-basis:100%}}
@media(max-width:620px){.course-module{gap:18px}.course-module h2{font-size:27px}.course-heading{gap:15px}.course-header-mark{display:none}.course-heading p{font-size:14px}.course-selection{grid-template-columns:1fr;gap:10px}.course-select{padding:16px;gap:7px;min-height:150px}.course-select>strong{font-size:18px}.course-select>span:not(.course-overline):not(.course-select-meta){font-size:12px}.course-select-meta{font-size:10px}.course-mode-tabs{display:grid;grid-template-columns:1fr;gap:8px;padding-bottom:14px}.course-mode-tabs .course-button{font-size:12px;text-align:center}.course-learning-layout{grid-template-columns:1fr;gap:18px}.course-syllabus{padding-bottom:16px;border-bottom:1px solid var(--course-line)}.course-lesson-list{display:grid;grid-template-columns:1fr 1fr;gap:5px}.course-lesson-pick{font-size:11px;min-height:52px;padding:8px 7px;grid-template-columns:18px minmax(0,1fr) 11px;gap:5px}.course-syllabus-actions{grid-template-columns:1fr 1fr;margin-top:12px;padding-top:12px}.course-syllabus-actions>.course-button{font-size:10px}.course-panel{padding:18px;border-radius:11px}.course-module .course-lesson-title{font-size:24px}.course-summary{font-size:14px}.course-concepts{font-size:13px;line-height:1.7;padding-left:18px}.course-examples{padding-left:13px}.course-examples p{font-size:16px}.course-overline{font-size:9px}.course-option{font-size:12px;padding:11px 10px;gap:10px}.course-options legend{font-size:15px}.course-exercise>.course-row.course-between{align-items:flex-start}.course-exercise>.course-row.course-between>.course-small{font-size:10px}.course-exercise-actions{align-items:stretch}.course-exercise-actions>.course-button{flex:1;min-width:130px;text-align:center;font-size:12px}.course-feedback{padding:13px;font-size:13px}.course-video-load{padding:18px;aspect-ratio:16/10}.course-video-load strong{font-size:12px}.course-mode-choices{grid-template-columns:1fr}.course-assessment-intro h3,.course-assessment-result h3{font-size:23px}.course-question-nav{gap:5px}.course-question-pick{min-width:36px;min-height:38px;font-size:10px;padding:6px}.course-score{font-size:48px}.course-review-list>li{padding-top:18px}.course-review-list>li>.course-row{align-items:flex-start}.course-history-item>summary{flex-wrap:wrap;gap:6px}.course-history-item>summary>span{flex-basis:calc(100% - 25px)}.course-result-label{white-space:normal}.course-syllabus-heading>span{font-size:10px}}
@media(prefers-reduced-motion:reduce){.course-module *{scroll-behavior:auto!important;transition:none!important}}