/* The same ink, paper and ruled margins run from the catalogue into each lesson. */
[hidden]{display:none!important}
.legacy-count{display:block;font-size:10px;color:var(--muted);margin-top:7px;line-height:1.6}

.topbar{background:var(--paper)}.sidebar{background:var(--nav)}.identity{font-size:33px}.primary{border-radius:2px}.secondary{border-radius:2px}.nav-link{border-radius:2px}.course-entry-copy h3{font:450 28px/1.3 var(--serif);letter-spacing:-.04em}.library-intro{position:relative;padding:13px 0 24px}.library-intro h1{font-size:clamp(42px,5.2vw,76px);line-height:1.04;max-width:13ch;letter-spacing:-.055em}.library-intro p{margin-top:28px;max-width:39ch}.entry-programme{font-size:12px;min-height:44px;display:flex;align-items:center;text-decoration:underline;text-underline-offset:5px;color:var(--muted)}.index-back{font-size:12px;display:inline-flex;align-items:center;min-height:44px;gap:10px;color:var(--muted);margin-top:-18px}.course-cover{display:grid;grid-template-columns:110px minmax(0,1fr);gap:25px;margin:35px 0 64px}.cover-index{font:350 clamp(72px,8vw,122px)/1 var(--serif);letter-spacing:-.08em;color:#8c9a74;border-top:2px solid #809069;padding-top:18px}.overline{font-size:10px;font-weight:450;letter-spacing:.065em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}.cover-copy h1{font:450 clamp(42px,5.6vw,76px)/1.05 var(--serif);letter-spacing:-.055em;margin:0 0 26px;text-wrap:balance}.cover-description{font-size:17px;line-height:1.8;max-width:48ch;color:var(--muted);margin:0 0 30px}.course-facts{display:flex;gap:34px;flex-wrap:wrap;padding:23px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.course-facts>span{font-size:18px;line-height:1.5;font-variant-numeric:tabular-nums}.course-facts small{display:block;color:var(--muted);font-size:11px;margin-top:5px}.cover-actions{display:flex;align-items:center;gap:22px;margin-top:25px}.cover-actions>span{font-size:12px;color:var(--muted)}.programme-heading{display:flex;gap:25px;justify-content:space-between;align-items:baseline;margin-bottom:22px}.programme-heading h2{font:400 34px var(--serif);letter-spacing:-.035em;margin:0}.programme-heading p{font-size:12px;line-height:1.8;color:var(--muted);margin:0}.syllabus-section{border-top:1px solid #a9b49c}.syllabus-section>summary{display:flex;align-items:center;gap:22px;min-height:86px;padding:18px 0;cursor:pointer;list-style:none}.syllabus-section>summary::-webkit-details-marker{display:none}.syllabus-section>summary>span:nth-child(2){font-size:20px;line-height:1.4;font-weight:500;flex:1;letter-spacing:-.025em}.section-number{font:400 28px/1 var(--serif);letter-spacing:-.04em;color:#7b8b6b;min-width:34px}.syllabus-section summary small{font-size:11px;color:var(--muted);white-space:nowrap}.section-toggle{font-size:25px;font-weight:300;line-height:1;min-width:28px;text-align:right}.syllabus-section[open] .section-toggle{font-size:0}.syllabus-section[open] .section-toggle:before{content:'−';font-size:25px}.syllabus-section ol{list-style:none;padding:0 0 25px 56px;margin:0}.topic-row{border-top:1px solid var(--line)}.topic-row a{display:flex;align-items:center;gap:18px;min-height:76px;padding:13px 8px 13px 0}.topic-row a:hover{color:var(--green)}.topic-row a:hover .topic-number{transform:translateX(3px)}.topic-number{color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums;min-width:20px;transition:transform .18s}.topic-name{font-size:15px;line-height:1.5;flex:1;min-width:0}.topic-name small{display:block;font-size:11px;color:var(--muted);margin-top:6px;font-weight:400}.topic-time{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}.topic-mark{font-size:17px;width:20px;flex:none;text-align:center;color:#647c50}.syllabus{border-bottom:1px solid var(--line)}
#reader.topic-reader{background:var(--paper);display:grid;grid-template-rows:62px 52px minmax(0,1fr)}#reader.topic-reader[hidden]{display:none}.topic-reader .reader-tools{height:auto;background:var(--paper)}.topic-reader .reader-tool{min-height:44px}.topic-reader .reader-top{background:var(--paper)}.topic-shell{display:grid;grid-template-columns:272px minmax(0,1fr);min-height:0}.programme-rail{border-right:1px solid var(--line);overflow-y:auto;padding:25px 21px 40px;background:#efefe5}.rail-heading{display:block;font:500 24px var(--serif);letter-spacing:-.04em;padding-bottom:27px}.rail-heading span{font:11px/1.5 var(--sans);display:block;margin-top:10px;letter-spacing:0;color:var(--muted)}.lesson-outline .syllabus-section{border-color:#c9d0c1}.lesson-outline .syllabus-section>summary{gap:10px;min-height:65px;padding:13px 0}.lesson-outline .section-number{font:11px var(--sans);min-width:17px;align-self:baseline;padding-top:2px}.lesson-outline .syllabus-section>summary>span:nth-child(2){font-size:12px;line-height:1.6;font-weight:500;letter-spacing:0}.lesson-outline summary small{display:none}.lesson-outline .section-toggle{font-size:19px;min-width:14px}.lesson-outline .syllabus-section[open] .section-toggle:before{font-size:19px}.lesson-outline .syllabus-section ol{padding:0 0 15px}.lesson-outline .topic-row{border:0}.lesson-outline .topic-row a{gap:9px;min-height:47px;padding:9px 6px 9px 1px}.lesson-outline .topic-number{font-size:10px;min-width:18px}.lesson-outline .topic-name{font-size:11px;line-height:1.65}.lesson-outline .topic-mark{font-size:13px;width:13px}.lesson-outline a[aria-current]{color:var(--green);background:#dfe7d1;border-left:2px solid #567344;padding-left:8px;margin-left:-9px}.lesson-area{display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-height:0;min-width:0}.lesson-heading{padding:24px clamp(23px,4.5vw,66px) 0;border-bottom:1px solid var(--line)}.lesson-heading>.overline{font-size:10px;margin:0 0 10px}.lesson-heading>.overline span{padding:0 10px;color:#9ca58f}.lesson-heading h1{font:450 clamp(20px,2.2vw,29px)/1.35 var(--serif);letter-spacing:-.03em;margin:0 0 12px;max-width:45ch}.lesson-tabs{display:flex;gap:28px}.lesson-tabs button{min-height:45px;font-size:12px;padding:9px 0;border-bottom:2px solid transparent;display:flex;align-items:center;gap:10px;color:var(--muted)}.lesson-tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--green)}.lesson-tabs small{font-size:10px;color:var(--muted)}.material-pane{min-height:0;display:flex;flex-direction:column}.topic-reader .reader-frame{height:100%;min-height:0;flex:1;background:var(--paper);width:100%}.trainer-return{display:flex;justify-content:space-between;gap:15px;background:#e5eadb;min-height:40px;align-items:center;padding:6px 22px;font-size:12px}.trainer-return a{min-height:35px;display:flex;align-items:center}.trainer-return span{font-size:10px;color:var(--muted)}.topic-footer{border-top:1px solid var(--line);padding:0 24px}.topic-footer a{display:flex;align-items:center;gap:14px;font-size:11px;line-height:1.6;min-height:46px}.topic-footer a span{font-size:10px;color:var(--muted);flex:none}.topic-footer b{font-size:17px;font-weight:400;margin-left:auto}.mobile-programme{display:none}
.tasks-pane{overflow-y:auto;padding:27px clamp(23px,4.5vw,66px) 50px;scroll-behavior:smooth}.tasks-intro{display:flex;gap:25px;align-items:baseline;justify-content:space-between;padding-bottom:21px}.tasks-intro p{font-size:13px;line-height:1.8;color:var(--muted);max-width:45ch;margin:0}.tasks-intro>span{font-size:11px;color:var(--green);flex:none}.topic-questions fieldset{padding:27px 0 30px;border:0;border-top:1px solid var(--line);margin:0;min-width:0}.topic-questions legend{font-size:17px;line-height:1.6;float:left;width:100%;padding:0 0 20px;font-weight:500;display:flex;gap:15px}.question-number{font:400 21px var(--serif);color:#7b8b6b;flex:none;min-width:24px}.answer-options{clear:both;margin:0 0 20px 39px;display:grid;gap:6px}.answer-options label{display:flex;gap:13px;align-items:baseline;cursor:pointer;min-height:44px;padding:10px 12px;border:1px solid transparent;font-size:14px;line-height:1.7}.answer-options label:has(input:checked){border-color:#94a680;background:#edf0e3}.answer-options input,.review-check input{accent-color:var(--green);flex:none;width:17px;height:17px;position:relative;top:3px}.topic-questions .secondary{margin-left:39px}.answer-feedback{margin:20px 0 0 39px;border-left:2px solid #aa7454;padding:0 0 0 18px;font-size:14px;line-height:1.8}.answer-feedback.correct{border-color:#79995b}.answer-feedback strong{font-weight:500}.answer-feedback p{color:var(--muted);margin:8px 0 0}.written-task{padding:31px 0 20px;border-top:1px solid #a5b397}.written-task h2,.topic-trainer h2{font:450 27px/1.4 var(--serif);letter-spacing:-.035em;margin:0 0 19px}.written-task>p:not(.overline){font-size:15px;line-height:1.9;max-width:67ch}.draft-label{font-size:12px;display:block;margin:27px 0 12px}.written-task textarea{font:16px/1.8 var(--sans);width:100%;min-height:180px;resize:vertical;padding:16px;border:1px solid #acb89d;background:#fcfbf6;color:var(--ink);border-radius:0}.written-task .draft-status{font-size:11px!important;color:var(--muted);margin:8px 0 24px}.solution{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 20px}.solution summary{min-height:50px;cursor:pointer;font-size:14px;padding:13px 0}.solution>div{font-size:14px;line-height:1.9;white-space:pre-wrap;padding-bottom:20px;overflow-wrap:anywhere}.review-check{font-size:13px;line-height:1.8;display:flex;align-items:baseline;gap:12px;min-height:44px;cursor:pointer}.topic-trainer{border-top:1px solid var(--line);padding:30px 0;display:flex;align-items:center;gap:35px}.topic-trainer p:not(.overline){font-size:13px;line-height:1.8;color:var(--muted)}.topic-trainer>div{flex:1}.topic-trainer .primary{white-space:normal;text-align:center}.topic-trainer h2{font-size:23px}
@media(max-width:1180px){.topic-shell{grid-template-columns:245px minmax(0,1fr)}.programme-rail{padding:24px 17px}.course-cover{grid-template-columns:80px minmax(0,1fr)}.course-facts{gap:25px}.course-facts>span{font-size:16px}.tasks-intro{display:block}.tasks-intro>span{display:block;margin-top:12px}}
@media(max-width:960px){.topic-shell{grid-template-columns:minmax(0,1fr)}.programme-rail{display:none}.mobile-programme{display:flex}.lesson-heading{padding-top:19px}.course-cover{margin-top:30px;gap:22px}.cover-copy h1{font-size:57px}.cover-description{font-size:16px}}
@media(max-width:560px){.library-intro h1{font-size:44px;line-height:1.04}.library-intro{padding-top:2px;padding-bottom:0}.library-intro p{margin-top:22px}.course-entry-copy h3{font-size:27px}.course-cover{grid-template-columns:42px minmax(0,1fr);gap:17px;margin:25px 0 43px}.cover-index{font-size:49px;padding-top:17px}.overline{font-size:9px;letter-spacing:.05em;margin-bottom:14px}.cover-copy h1{font-size:39px;line-height:1.1;margin-bottom:22px}.cover-description{font-size:14px;line-height:1.85;margin-bottom:24px}.course-facts{display:grid;grid-template-columns:1fr 1fr;gap:19px 16px;padding:19px 0}.course-facts>span{font-size:17px}.course-facts>span:last-child{grid-column:1/-1}.course-facts small{font-size:10px;line-height:1.6}.cover-actions{display:block;margin-top:20px}.cover-actions>span{display:block;margin:15px 0 0;font-size:11px}.cover-actions .primary{font-size:13px;padding:13px 17px}.programme-heading{display:block;margin-bottom:20px}.programme-heading h2{font-size:29px;margin-bottom:14px}.programme-heading p{font-size:12px}.programme-heading br{display:none}.syllabus-section>summary{gap:13px;min-height:86px;padding:19px 0}.section-number{font-size:25px;min-width:27px}.syllabus-section>summary>span:nth-child(2){font-size:17px;line-height:1.5}.syllabus-section summary small{display:none}.section-toggle{min-width:20px;font-size:23px}.syllabus-section ol{padding:0 0 20px 40px}.topic-row a{gap:10px;flex-wrap:wrap;padding:15px 0}.topic-number{font-size:10px;min-width:18px;align-self:flex-start;margin-top:3px}.topic-name{font-size:14px;flex-basis:calc(100% - 64px);flex-grow:1}.topic-name small{font-size:10px;line-height:1.7}.topic-time{order:4;width:100%;padding-left:28px;font-size:10px;margin-top:0}.topic-mark{width:16px;font-size:16px;align-self:flex-start}.topic-reader .reader-back{min-width:40px}.topic-reader .reader-title{font-size:13px}.topic-reader .reader-duration{font-size:9px}.topic-reader .reader-tools{padding:0 12px}.topic-reader .reader-tool{font-size:11px;min-height:44px;padding:8px;gap:7px}.topic-reader .reader-done{font-size:10px}.topic-reader .reader-position{font-size:10px}.topic-reader .reader-top{height:auto}.topic-reader#reader{grid-template-rows:calc(56px + env(safe-area-inset-top)) 49px minmax(0,1fr)}.lesson-heading{padding:16px 21px 0}.lesson-heading h1{font-size:21px;line-height:1.35;margin-bottom:9px}.lesson-heading .overline{font-size:9px;margin-bottom:9px}.lesson-tabs{gap:25px}.lesson-tabs button{font-size:12px;gap:8px}.lesson-tabs small{font-size:9px}.tasks-pane{padding:24px 21px 38px}.topic-footer{padding:0 16px}.topic-footer a{gap:10px;font-size:10px;min-height:44px}.topic-footer a span{display:none}.tasks-intro p{font-size:12px}.topic-questions legend{font-size:16px;gap:11px}.question-number{font-size:20px;min-width:23px}.answer-options{margin-left:0}.answer-options label{padding:10px 6px;font-size:14px}.topic-questions .secondary{margin-left:0;min-height:44px}.answer-feedback{margin-left:0;font-size:14px}.written-task h2{font-size:26px}.written-task>p:not(.overline){font-size:15px}.topic-trainer{display:block}.topic-trainer .primary{margin-top:8px}.trainer-return{padding:5px 17px;font-size:11px}.trainer-return span{display:none}dialog{border-radius:2px}.topic-reader~dialog{z-index:45}}
@media(max-width:360px){.library-intro h1{font-size:38px}.cover-copy h1{font-size:33px}.course-cover{grid-template-columns:35px minmax(0,1fr);gap:12px}.cover-index{font-size:42px}.topic-reader .reader-tool{padding:8px 6px;gap:5px}.topic-reader .reader-tools{padding:0 7px}.lesson-heading{padding-left:17px;padding-right:17px}.lesson-heading h1{font-size:19px}.topic-reader .reader-title{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.question-context{white-space:pre-line;clear:both;font-size:14px;line-height:1.8;color:var(--muted);margin:0 0 20px 39px;padding:15px 0;border-bottom:1px solid var(--line)}@media(max-width:560px){.question-context{margin-left:0}}
@media(max-width:560px){.trainer-reader .lesson-heading{padding-top:10px}.trainer-reader .lesson-heading>.overline,.trainer-reader .lesson-tabs small,.trainer-reader .topic-footer{display:none}.trainer-reader .lesson-heading h1{font-size:17px;margin-bottom:2px}.trainer-reader .lesson-tabs button{min-height:40px}}