@font-face{font-family:Onest;src:url('/assets/onest-cyrillic.woff2') format('woff2');font-weight:100 900;font-display:swap;unicode-range:U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:Onest;src:url('/assets/onest-latin.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{--radius:18px;--radius-small:10px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.55 Onest,Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:active,.primary-button:active{transform:translateY(1px)}button{border:0}a,button{transition:background .18s,color .18s,border-color .18s,transform .18s}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:500}::selection{background:var(--selection-bg);color:var(--selection-text)}[hidden]{display:none!important}.icon{display:inline-block;width:22px;height:22px;flex:0 0 22px;background:currentColor;mask-image:var(--icon);mask-size:contain;mask-repeat:no-repeat;mask-position:center;-webkit-mask-image:var(--icon);-webkit-mask-size:contain;-webkit-mask-repeat:no-repeat;-webkit-mask-position:center;vertical-align:middle}.icon.small{width:16px;height:16px;flex-basis:16px}.icon.large{width:28px;height:28px;flex-basis:28px}.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:var(--accent);color:var(--brand-ink);padding:12px 20px;border-radius:8px}.skip-link:focus{top:15px}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;background:var(--sidebar);border-right:1px solid var(--border);padding:38px 22px 0;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:13px;padding:0 9px}.brand-symbol{height:50px;width:50px;background:var(--accent);border-radius:14px;color:var(--brand-ink);font-size:33px;font-weight:700;letter-spacing:-3px;position:relative;line-height:52px;padding-left:6px}.brand-symbol>span{position:absolute;font-size:15px;right:5px;top:-9px;letter-spacing:0}.brand-wordmark{font-size:22px;line-height:1.04;letter-spacing:-.7px;font-weight:550;position:relative}.brand-caption{display:block;font-size:7px;letter-spacing:1.2px;color:var(--muted);margin-top:10px;white-space:nowrap}.nav-label{font-size:9px;font-weight:500;letter-spacing:1.2px;color:var(--quiet);margin:66px 12px 15px}.main-nav{display:grid;gap:7px}.main-nav a{position:relative;display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:var(--radius-small);font-size:13px;color:var(--muted);min-height:48px;white-space:nowrap}.main-nav a:hover{background:var(--surface-hover);color:var(--text)}.main-nav a.active{color:var(--accent);background:var(--surface-select)}.nav-current{display:none;width:5px;height:5px;background:var(--accent);border-radius:50%;margin-left:auto}.active .nav-current{display:block}.saved-count{margin-left:auto;font-size:11px;border:1px solid var(--border);min-width:20px;text-align:center;border-radius:5px}.sidebar-bottom{margin-top:auto}.help-link{display:flex;width:100%;align-items:center;gap:10px;color:var(--muted);font-size:12px;padding:17px 10px;background:none}.help-link .small{margin-left:auto}.help-link:hover{color:var(--text)}.profile{display:flex;align-items:center;width:calc(100% + 44px);gap:11px;text-align:left;background:transparent;border-top:1px solid var(--border);margin:13px -22px 0;padding:21px 25px}.profile:hover{background:var(--surface-hover)}.avatar,.top-avatar{display:grid;place-items:center;height:36px;width:36px;border-radius:50%;background:var(--avatar-bg);color:var(--avatar-text);font-weight:500;flex-shrink:0}.profile strong{display:block;font-size:12px;font-weight:500}.profile small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.profile .icon{margin-left:auto;color:var(--muted)}.workspace{margin-left:238px;min-height:100dvh;display:flex;flex-direction:column}.topbar{height:85px;padding:0 44px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);gap:15px}.breadcrumbs{display:flex;align-items:center;gap:17px;font-size:11px;color:var(--quiet)}.breadcrumbs>span:last-child{color:var(--text-body)}.breadcrumbs .icon{width:11px;flex-basis:11px;color:var(--quiet)}.topbar-right{display:flex;align-items:center;gap:18px}.preview-label{font-size:10px;color:var(--muted);border:1px solid var(--border-detail);border-radius:6px;padding:4px 9px}.top-avatar{height:31px;width:31px;font-size:11px}.mobile-brand,.mobile-nav{display:none}main{padding:42px 44px 0;width:100%;max-width:1450px;margin:0 auto;flex:1}main:focus{outline:none}.page-heading{margin-bottom:32px}.welcome-note{font-size:12px;color:var(--muted);margin-bottom:11px;display:flex;align-items:center;gap:8px}.welcome-note .icon{color:var(--accent);width:17px;flex-basis:17px}.page-heading h1{font-size:clamp(32px,3.2vw,48px);letter-spacing:-1.7px;line-height:1.17;font-weight:450}.page-heading>p{font-size:13px;color:var(--muted);margin-top:13px;max-width:570px;line-height:1.7}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 254px;gap:30px;align-items:start}.dashboard-main{min-width:0}.course-card{display:grid;grid-template-columns:42% 58%;background:var(--surface);border:1px solid var(--border-detail);border-radius:var(--radius);overflow:hidden;min-height:309px}.course-art{position:relative;overflow:hidden;isolation:isolate;background:radial-gradient(ellipse at 55% 45%,#3c4c2b 0%,#26301f 40%,#1b2118 78%);min-height:309px;border-right:1px solid var(--border-detail)}.art-line{position:absolute;left:25px;top:23px;font-size:9px;letter-spacing:1.4px;color:#bdcaa8}.art-number{position:absolute;left:25px;bottom:16px;font-size:108px;line-height:1;font-weight:300;letter-spacing:-9px;color:#94a578;opacity:.25}.art-small{position:absolute;right:20px;bottom:25px;text-align:right;font-size:8px;letter-spacing:1px;color:#becaa9;line-height:1.6}.art-orbit{position:absolute;border:1px solid #b0c68b24;border-radius:50%;width:350px;height:350px;left:50%;top:49%;transform:translate(-50%,-50%)}.art-orbit:after{content:'';position:absolute;inset:38px;border:1px solid #b0c68b20;border-radius:50%}.art-sculpture{position:absolute;left:50%;top:45%;width:134px;height:150px;transform:translate(-50%,-50%)}.slab{position:absolute;width:114px;height:73px;left:10px;border-radius:8px;transform:rotate(-30deg) skewX(27deg);background:linear-gradient(145deg,#8ca66d,#405236);border:1px solid #bfd69867;box-shadow:-9px 11px 0 #28391e,-9px 12px 0 #7d975745,0 23px 32px #060d0355}.slab:nth-child(1){top:96px;background:linear-gradient(135deg,#5f7250,#34452a)}.slab:nth-child(2){top:64px;background:linear-gradient(135deg,#829a68,#445a35)}.slab:nth-child(3){top:32px;background:linear-gradient(135deg,#adca89,#718f50)}.slab:nth-child(4){top:0;background:linear-gradient(135deg,#d6e9b6,#a5c77b);box-shadow:-9px 11px 0 #6d8b4b,-9px 12px 0 #91ae64,0 2px 25px #c3df8e19}.slab:nth-child(4):after{content:'↗';position:absolute;inset:0;display:grid;place-items:center;transform:skewX(-27deg);font-size:50px;line-height:1;color:#47602e;font-family:Arial,sans-serif;font-weight:300}.course-info{padding:27px 28px;display:flex;flex-direction:column;align-items:flex-start}.course-tag{display:flex;align-items:center;gap:8px;font-size:10px;color:var(--accent);margin-bottom:12px}.course-tag>span{background:var(--badge-bg);padding:3px 8px;border-radius:5px}.course-info h2{font-size:28px;line-height:1.18;letter-spacing:-.9px;max-width:300px}.course-info>p{font-size:11px;color:var(--text-subtle);line-height:1.75;margin:12px 0 18px;max-width:300px}.course-meta{display:flex;flex-wrap:wrap;gap:15px;color:var(--text-subtle);font-size:10px;margin-top:auto;margin-bottom:20px}.course-meta span{display:flex;align-items:center;gap:6px}.course-meta .icon{width:14px;flex-basis:14px;height:14px}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:14px;background:var(--accent);color:var(--accent-ink);border:1px solid transparent;font-weight:550;font-size:12px;white-space:nowrap;padding:13px 17px;border-radius:var(--radius-small);min-height:46px;line-height:1.2}.primary-button:hover{background:var(--accent-hover);box-shadow:0 4px 18px #0001}.primary-button .icon{height:18px;width:18px;flex-basis:18px}.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:12px;padding:11px 15px;min-height:44px;border-radius:var(--radius-small);border:1px solid var(--border-strong);background:var(--neutral-button-bg);white-space:nowrap}.secondary-button:hover{background:var(--neutral-button-hover)}.secondary-button.selected{color:var(--accent);border-color:var(--accent-border-strong)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:31px 0 16px}.section-heading h2{font-size:19px;font-weight:450;letter-spacing:-.4px}.section-heading>span{font-size:10px;color:var(--muted)}.lesson-list{display:grid;gap:8px}.lesson-row{display:flex;align-items:center;gap:15px;padding:16px 17px;border:1px solid var(--border);border-radius:12px;background:var(--surface-soft);min-height:84px}.lesson-row:hover{background:var(--surface-hover);border-color:var(--accent-border)}.lesson-number{height:37px;width:37px;display:grid;place-items:center;background:var(--surface-inset);border:1px solid var(--border-detail);border-radius:10px;font-size:11px;color:var(--text-subtle);flex-shrink:0}.lesson-row:first-child .lesson-number{color:var(--accent);background:var(--surface-select);border-color:var(--accent-border)}.lesson-number.complete{background:var(--success-bg)!important;color:var(--accent)!important;border-color:var(--success-border)!important}.lesson-row-info{flex:1;min-width:0}.lesson-row h3{font-size:12px;line-height:1.5;font-weight:500}.lesson-row p{font-size:10px;line-height:1.5;color:var(--muted);margin-top:4px}.lesson-row-end{display:flex;align-items:center;gap:13px;color:var(--muted);font-size:10px;flex-shrink:0}.lesson-row-end .icon{width:17px;flex-basis:17px}.lesson-row:hover .lesson-row-end{color:var(--accent)}.progress-panel{background:var(--surface-raised);border:1px solid var(--border-detail);border-radius:var(--radius);padding:22px}.panel-label{font-size:12px;font-weight:500}.progress-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.progress-top .icon{color:var(--text-subtle);width:18px;flex-basis:18px}.progress-value{font-size:40px;line-height:1;letter-spacing:-1.5px;font-weight:400}.progress-value span{font-size:19px;color:var(--quiet);letter-spacing:-.5px}.progress-caption{color:var(--muted);font-size:10px;margin-top:8px}.progress-segments{display:flex;gap:5px;margin:20px 0}.progress-segments>span{height:5px;background:var(--track);border-radius:3px;flex:1}.progress-segments>span.filled{background:var(--accent)}.progress-message{font-size:11px;color:var(--text-subtle);line-height:1.7}.route-panel{padding:28px 7px}.route-panel>h2{font-size:13px;font-weight:500;margin-bottom:24px}.route-steps{display:grid;gap:27px;list-style:none;margin:0;padding:0}.route-steps li{display:flex;gap:13px;position:relative}.route-steps li:not(:last-child):after{content:'';height:24px;width:1px;background:var(--avatar-bg);position:absolute;top:29px;left:11px}.route-step-number{height:24px;width:24px;flex-shrink:0;border:1px solid var(--border-strong);border-radius:50%;display:grid;place-items:center;font-size:9px;color:var(--muted)}.route-steps li:first-child .route-step-number{color:var(--accent);border-color:var(--accent-border-strong);background:var(--surface-select)}.route-steps h3{font-size:11px;font-weight:500;padding-top:2px}.route-steps p{font-size:10px;color:var(--quiet);line-height:1.6;margin-top:4px}.gentle-tip{border-top:1px solid var(--border);padding:24px 6px;display:flex;gap:10px;font-size:11px;color:var(--muted);line-height:1.8}.gentle-tip>.icon{color:var(--accent);width:18px;flex-basis:18px;margin-top:2px}.gentle-tip strong{font-size:11px;font-weight:450;color:var(--text-body);display:block;margin-bottom:4px}.after-block{display:flex;align-items:center;gap:13px;margin-top:18px;border:1px dashed var(--border-detail);border-radius:12px;padding:18px 20px}.after-block>.icon{color:var(--quiet);width:19px;flex-basis:19px}.after-block h3{font-size:11px;color:var(--text-subtle);font-weight:450}.after-block p{font-size:10px;color:var(--quiet);margin-top:3px}.site-footer{padding:35px 44px 24px;margin-top:20px;display:flex;justify-content:space-between;gap:15px;font-size:9px;color:var(--quiet)}.site-footer>span:first-child{font-weight:500;letter-spacing:.3px}.loading-shell{min-height:300px;display:grid;place-items:center;color:var(--muted)}
/* Lesson view */
.back-link{display:inline-flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);margin:0 0 23px}.back-link:hover{color:var(--accent)}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:30px;align-items:start}.lesson-content{min-width:0}.lesson-heading{margin-bottom:24px}.lesson-kicker{font-size:10px;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:9px}.lesson-kicker span+span{color:var(--muted);border-left:1px solid var(--border-strong);padding-left:9px}.lesson-heading h1{font-size:clamp(27px,2.8vw,39px);line-height:1.2;font-weight:450;letter-spacing:-1.1px}.lesson-heading>p{font-size:12px;color:var(--muted);line-height:1.8;margin-top:12px;max-width:640px}.lesson-toolbar{display:flex;align-items:center;justify-content:space-between;margin:22px 0 25px;border-bottom:1px solid var(--border);gap:10px}.lesson-tabs{display:flex;gap:23px}.lesson-tab{padding:13px 0;color:var(--muted);background:none;font-size:12px;border-bottom:2px solid transparent;display:flex;align-items:center;gap:7px}.lesson-tab.active{color:var(--text);border-color:var(--accent)}.lesson-tab .icon{width:15px;height:15px;flex-basis:15px}.bookmark-button{width:38px;height:38px;display:grid;place-items:center;color:var(--muted);border-radius:8px;background:none;flex-shrink:0}.bookmark-button:hover{color:var(--text);background:var(--surface-hover)}.bookmark-button.saved{color:var(--accent);background:var(--surface-select)}.lesson-article{font-size:14px;line-height:1.9;color:var(--text-body);max-width:760px}.lesson-article h2{font-size:23px;line-height:1.3;letter-spacing:-.5px;color:var(--text);margin:30px 0 14px;font-weight:450}.lesson-article h2:first-child{margin-top:0}.lesson-article p+p{margin-top:16px}.lesson-article strong{font-weight:550;color:var(--text)}.lesson-article ul,.lesson-article ol{padding-left:21px;margin:13px 0}.lesson-article li{padding:4px 0 4px 4px}.lesson-article li::marker{color:var(--accent)}.lesson-article .inline-term{color:var(--accent);text-decoration:underline;text-decoration-color:var(--accent-border);text-underline-offset:4px}.article-callout{padding:20px 23px;border-left:2px solid var(--accent);background:var(--surface-accent);border-radius:0 12px 12px 0;margin:24px 0;font-size:13px;line-height:1.85}.article-callout strong{display:block;margin-bottom:6px;font-weight:500}.flow-diagram{display:grid;grid-template-columns:1fr 24px 1fr 24px 1fr;gap:9px;align-items:center;background:var(--surface-accent);border:1px solid var(--border-detail);border-radius:15px;padding:24px 20px;margin:23px 0}.flow-node{text-align:center;line-height:1.5}.flow-node>.icon{display:block;margin:0 auto 11px;color:var(--accent);width:24px;height:24px;flex-basis:24px}.flow-node strong{display:block;font-size:12px}.flow-node small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.flow-diagram>.icon{color:var(--accent);width:17px;height:17px;flex-basis:17px}.lesson-side{position:sticky;top:25px;background:var(--surface-raised);border:1px solid var(--border-detail);border-radius:15px;padding:21px 18px}.lesson-side>small{font-size:9px;color:var(--accent)}.lesson-side>h2{font-size:16px;letter-spacing:-.3px;line-height:1.4;margin-top:7px}.lesson-side-list{margin-top:21px;display:grid;gap:7px}.lesson-side-row{display:flex;align-items:flex-start;gap:10px;font-size:11px;padding:11px 10px;border:1px solid transparent;border-radius:9px;color:var(--muted)}.lesson-side-row>span:first-child{font-size:9px;min-width:18px;padding-top:2px}.lesson-side-row>span:last-child{flex:1}.lesson-side-row:hover{color:var(--text);background:var(--surface-hover)}.lesson-side-row.current{color:var(--accent);background:var(--surface-select);border-color:var(--accent-border)}.lesson-side-row .icon{width:14px;height:14px;flex-basis:14px}.side-help{border-top:1px solid var(--border);margin-top:18px;padding-top:18px;color:var(--muted);font-size:10px}.side-help button{background:none;padding:0;color:var(--accent);font-size:10px;text-decoration:underline;text-underline-offset:3px}.lesson-actions{border-top:1px solid var(--border);margin-top:32px;padding-top:23px;display:flex;align-items:center;justify-content:space-between;gap:15px}.lesson-actions>span{font-size:10px;color:var(--muted)}.lesson-actions>span.done{color:var(--accent)}.notes-intro{color:var(--muted);font-size:12px;line-height:1.8;margin-bottom:18px}.notes-label{display:block;font-size:12px;margin-bottom:9px}.note-input{display:block;width:100%;min-height:290px;padding:20px;background:var(--surface-inset);border:1px solid var(--border-strong);border-radius:12px;color:var(--text);resize:vertical;font-size:13px;line-height:1.85}.note-input::placeholder{color:var(--quiet)}.note-status{font-size:10px;color:var(--muted);margin-top:10px;min-height:20px}.summary-list{padding:0!important;list-style:none;margin:0!important;display:grid;gap:14px}.summary-list li{display:flex;align-items:flex-start;gap:12px;background:var(--surface-accent);border:1px solid var(--border-detail);border-radius:12px;padding:17px 19px;font-size:13px;line-height:1.8}.summary-list .icon{width:18px;height:18px;flex-basis:18px;color:var(--accent);margin-top:3px}.knowledge-check{margin-top:30px;border:1px solid var(--border-detail);border-radius:15px;padding:23px;background:var(--surface-raised)}.knowledge-check>span{font-size:10px;color:var(--accent)}.knowledge-check h3{font-size:15px;line-height:1.6;margin:8px 0 17px;font-weight:450;color:var(--text)}.quiz-options{display:grid;gap:9px}.quiz-option{display:flex;align-items:center;text-align:left;gap:10px;padding:13px 14px;border:1px solid var(--border-detail);border-radius:9px;background:var(--surface-raised);color:var(--text-subtle);font-size:12px;line-height:1.6}.quiz-option:hover{border-color:var(--accent-border-strong);background:var(--surface-select-hover)}.quiz-option:before{content:'';width:13px;height:13px;flex:0 0 13px;border:1px solid var(--border-strong);border-radius:50%}.quiz-option[aria-pressed="true"]{border-color:var(--accent);background:var(--surface-select)}.quiz-option[aria-pressed="true"]:before{background:var(--accent);box-shadow:inset 0 0 0 3px var(--surface-select);border-color:var(--accent)}.quiz-feedback{font-size:12px;line-height:1.8;color:var(--accent);margin-top:14px}.quiz-feedback.try-again{color:var(--text-body)}.completion-card{padding:30px;text-align:center;background:var(--surface-accent);border:1px solid var(--accent-border);border-radius:18px;margin:25px 0}.completion-card>.icon{color:var(--accent);width:40px;height:40px;flex-basis:40px}.completion-card h2{margin:15px 0 10px}.completion-card p{max-width:500px;margin:auto;font-size:13px}.completion-card a{margin-top:20px}.mobile-curriculum{display:none}.empty-state{padding:55px 25px;border:1px dashed var(--border-detail);border-radius:18px;text-align:center;background:var(--surface-soft)}.empty-state>.icon{width:36px;height:36px;color:var(--accent);margin-bottom:15px}.empty-state h2{font-size:22px;letter-spacing:-.5px}.empty-state p{font-size:12px;color:var(--muted);max-width:420px;margin:11px auto 23px;line-height:1.8}.saved-page{max-width:900px}.saved-page .lesson-list{margin-top:25px}.glossary-intro{max-width:650px}.search-field{display:flex;align-items:center;gap:12px;border:1px solid var(--border-strong);background:var(--surface-raised);border-radius:10px;padding:0 16px;max-width:550px;margin:26px 0 35px;color:var(--text-subtle)}.search-field input{border:0;outline:0;background:none;min-height:48px;width:100%;color:var(--text);font-size:13px}.search-field input::placeholder{color:var(--text-subtle)}.search-field:focus-within{outline:2px solid var(--accent);outline-offset:3px}.search-field input:focus-visible{outline:0}.glossary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:1000px}.term-card{border-top:1px solid var(--border-detail);padding:23px 1px 10px;scroll-margin:30px}.term-card h2{font-size:19px;letter-spacing:-.4px;margin-bottom:10px}.term-card p{font-size:12px;line-height:1.9;color:var(--muted);max-width:420px}.term-card.highlighted{border-color:var(--accent)}.term-example{font-size:10px;color:var(--text-subtle);background:var(--surface-accent);border-radius:7px;padding:10px 13px;margin-top:14px}.search-empty{padding:25px 0;color:var(--muted);font-size:13px}.storage-notice{font-size:11px;padding:12px 17px;background:var(--notice-bg);border:1px solid var(--notice-border);border-radius:10px;margin:0 0 22px;color:var(--notice-text)}.toast-visible{opacity:1!important;transform:translate(-50%,0)!important}#toast{position:fixed;bottom:28px;left:calc(50% + 100px);transform:translate(-50%,10px);padding:12px 20px;background:var(--toast-bg);color:var(--toast-text);border:1px solid var(--toast-border);border-radius:11px;font-size:12px;box-shadow:0 6px 30px #0006;z-index:60;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;max-width:calc(100vw - 32px);text-align:center}
/* Dialogs and small screens */
dialog{width:min(480px,calc(100% - 32px));max-height:calc(100dvh - 60px);border:1px solid var(--border-strong);border-radius:20px;background:var(--surface-raised);color:var(--text);padding:29px;box-shadow:0 25px 100px #0009}dialog::backdrop{background:var(--overlay);backdrop-filter:blur(5px)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:17px}.dialog-top h2{font-size:23px;font-weight:450;letter-spacing:-.6px}.close-button{width:35px;height:35px;display:grid;place-items:center;border:1px solid var(--border-strong);background:var(--neutral-button-bg);border-radius:9px;color:var(--text-subtle);flex-shrink:0}.dialog-body>p{font-size:12px;color:var(--muted);line-height:1.85;margin-bottom:17px}.access-details{margin:20px 0;display:grid;gap:0}.access-details>div{display:flex;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px solid var(--border-detail);font-size:12px}.access-details dt{color:var(--muted)}.access-details dd{margin:0}.access-details .accent{color:var(--accent)}.dialog-note{font-size:11px!important;line-height:1.9!important;color:var(--text-subtle)!important;padding:13px 15px;background:var(--surface-accent);border-radius:9px}.faq-item{border-bottom:1px solid var(--border-detail);padding:16px 0}.faq-item summary{cursor:pointer;font-size:12px;line-height:1.6;padding-right:15px}.faq-item p{font-size:11px;line-height:1.85;color:var(--muted);margin-top:12px}.reset-button{margin-top:25px;background:none;color:var(--muted);padding:8px 0;font-size:11px;text-decoration:underline;text-underline-offset:4px}.reset-button:hover{color:var(--text)}.dialog-actions{display:flex;gap:10px;margin-top:20px}.dialog-actions>*{flex:1}.content-enter{animation:content-in .25s ease-out}@keyframes content-in{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1650px){main{padding-top:50px}.dashboard-grid{gap:38px;grid-template-columns:minmax(0,1fr) 270px}.course-card{min-height:345px}.course-art{min-height:345px}.course-info{padding:33px 36px}.course-info h2{font-size:34px}.course-info>p{font-size:13px}.course-meta{font-size:11px}.course-info .primary-button{font-size:13px}.lesson-row h3{font-size:13px}.lesson-row p{font-size:11px}}
@media(max-width:1279px){.sidebar{width:214px;padding-left:15px;padding-right:15px}.workspace{margin-left:214px}.brand{padding-left:7px}.brand-symbol{height:44px;width:44px;line-height:46px;font-size:29px}.brand-wordmark{font-size:20px}.main-nav a{font-size:12px}.profile{width:calc(100% + 30px);margin-left:-15px;margin-right:-15px;padding-left:22px;padding-right:22px}.topbar{padding:0 30px}main{padding:34px 30px 0}.dashboard-grid{grid-template-columns:minmax(0,1fr) 215px;gap:22px}.course-card{grid-template-columns:38% 62%}.course-info{padding:24px 22px}.course-info h2{font-size:25px}.course-info>p{font-size:11px}.course-meta{gap:10px}.primary-button{font-size:11px;padding-left:13px;padding-right:13px;gap:9px}.progress-panel{padding:19px}.lesson-layout{grid-template-columns:minmax(0,1fr) 230px;gap:23px}.site-footer{padding-left:30px;padding-right:30px}.course-art{min-height:310px}.art-sculpture{transform:translate(-50%,-50%) scale(.85)}.art-small{display:none}}
@media(max-width:1100px) and (min-width:768px){.dashboard-grid{grid-template-columns:minmax(0,1fr)}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:22px}.route-panel{padding:16px 7px}.route-panel>h2{margin-bottom:18px}.route-steps{gap:20px}.route-steps li:not(:last-child):after{height:17px}.gentle-tip{display:none}.course-card{grid-template-columns:41% 59%;min-height:290px}.course-art{min-height:290px}.course-info>p{font-size:12px}.course-info h2{font-size:29px}.course-info .primary-button{font-size:12px}.lesson-layout{grid-template-columns:minmax(0,1fr)}.lesson-side{display:none}.mobile-curriculum{display:block;border:1px solid var(--border-detail);border-radius:11px;padding:13px 16px;margin-bottom:25px;background:var(--surface-raised)}.mobile-curriculum>summary{font-size:12px;cursor:pointer;color:var(--accent)}.mobile-curriculum .lesson-side-list{margin-top:10px}.lesson-article{max-width:none}}
@media(max-width:767px){.sidebar{display:none}.workspace{margin-left:0}.topbar{height:70px;padding:0 22px;gap:10px}.breadcrumbs{display:none}.mobile-brand{display:flex;align-items:center;gap:5px;font-size:20px;font-weight:550;letter-spacing:-.7px}.mobile-brand>span{font-size:22px;font-weight:400;color:var(--accent);margin-left:3px}.topbar-right{gap:11px}.preview-label{font-size:9px;padding:3px 7px}.top-avatar{width:29px;height:29px}main{padding:29px 22px 0}.page-heading{margin-bottom:24px}.welcome-note{font-size:11px;margin-bottom:10px}.page-heading h1{font-size:33px;letter-spacing:-1.2px;line-height:1.15}.page-heading>p{font-size:12px;line-height:1.8;margin-top:13px;max-width:500px}.dashboard-grid{grid-template-columns:1fr;gap:23px}.course-card{grid-template-columns:1fr;min-height:0}.course-art{min-height:198px;height:198px;border-right:0;border-bottom:1px solid var(--border-detail)}.art-sculpture{top:49%;left:55%;transform:translate(-50%,-50%) scale(.86)}.art-orbit{height:285px;width:285px;left:55%;top:50%}.art-number{font-size:90px;bottom:12px;left:20px}.art-line{top:19px;left:20px}.art-small{display:block;right:20px;bottom:21px;font-size:8px}.course-info{padding:24px}.course-info h2{font-size:29px;max-width:100%;letter-spacing:-.8px}.course-info>p{font-size:12px;max-width:440px;margin:13px 0 18px}.course-tag{margin-bottom:12px;font-size:10px}.course-meta{font-size:11px;margin-bottom:20px;gap:18px}.course-info .primary-button{width:100%;font-size:12px;min-height:48px}.section-heading{margin-top:28px;margin-bottom:16px}.section-heading h2{font-size:19px}.lesson-row{padding:15px 13px;gap:12px;min-height:86px}.lesson-number{height:32px;width:32px;font-size:10px;border-radius:8px}.lesson-row h3{font-size:12px;line-height:1.5}.lesson-row p{font-size:10px;margin-top:5px}.lesson-row-end{gap:6px}.lesson-row-end>span:not(.icon){display:none}.lesson-row-end .icon{width:16px;flex-basis:16px}.after-block{padding:17px 14px}.dashboard-aside{display:grid;grid-template-columns:1fr;gap:0}.progress-panel{padding:21px;display:grid;grid-template-columns:1fr 1fr;column-gap:20px;align-items:center}.progress-top{grid-column:1/-1;margin-bottom:17px}.progress-value{grid-column:1;font-size:33px;grid-row:2}.progress-caption{grid-column:1;grid-row:3;margin-top:4px}.progress-segments{grid-column:2;grid-row:2;margin:0}.progress-message{grid-column:1/-1;font-size:11px;margin-top:17px}.route-panel{padding:25px 4px 10px}.route-panel>h2{font-size:14px;margin-bottom:20px}.route-steps{gap:23px}.route-steps h3{font-size:12px}.route-steps p{font-size:11px}.gentle-tip{display:none}.site-footer{padding:16px 22px 102px;margin-top:22px;flex-direction:column;gap:5px;font-size:9px}.mobile-nav{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);bottom:0;left:0;right:0;background:var(--nav-bg);backdrop-filter:blur(16px);border-top:1px solid var(--border-detail);z-index:30;padding:10px 8px calc(10px + env(safe-area-inset-bottom))}.mobile-nav a,.mobile-nav button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;font-size:9px;line-height:1.4;color:var(--muted);background:none;padding:4px 1px;border-radius:8px;min-height:45px}.mobile-nav a.active{color:var(--accent)}.mobile-nav .icon{height:20px;width:20px;flex-basis:20px}.lesson-layout{grid-template-columns:1fr}.lesson-side{display:none}.back-link{font-size:11px;margin-bottom:19px}.lesson-heading h1{font-size:30px;letter-spacing:-1px;line-height:1.2}.lesson-heading>p{font-size:12px}.lesson-kicker{font-size:10px}.mobile-curriculum{display:block;border:1px solid var(--border-detail);border-radius:10px;padding:13px 16px;margin-bottom:23px;background:var(--surface-raised)}.mobile-curriculum>summary{font-size:11px;color:var(--accent);cursor:pointer}.mobile-curriculum .lesson-side-list{margin-top:9px}.lesson-toolbar{margin-top:20px}.lesson-tabs{gap:21px}.lesson-tab{font-size:11px}.lesson-tab .icon{display:none}.lesson-article{font-size:13px;line-height:1.95}.lesson-article h2{font-size:21px}.article-callout{padding:17px 18px;font-size:12px;margin:22px 0}.flow-diagram{padding:20px 12px;gap:3px;grid-template-columns:1fr 17px 1fr 17px 1fr}.flow-node strong{font-size:11px}.flow-node small{font-size:9px}.flow-node>.icon{width:23px;height:23px}.flow-diagram>.icon{width:14px}.lesson-actions{align-items:stretch;flex-direction:column-reverse;gap:12px}.lesson-actions>.primary-button{font-size:12px;min-height:48px}.lesson-actions>span{text-align:center;font-size:10px}.knowledge-check{padding:20px 16px}.knowledge-check h3{font-size:14px}.quiz-option{font-size:11px;padding:12px}.glossary-grid{grid-template-columns:1fr;gap:10px}.search-field{margin:22px 0 24px}.search-field input{font-size:12px}.term-card{padding-top:20px}.term-card h2{font-size:20px}.term-card p{font-size:12px}.empty-state{padding:38px 22px}.empty-state h2{font-size:23px}.empty-state p{font-size:12px}#toast{left:50%;bottom:91px;font-size:11px;padding:10px 15px}.completion-card{padding:24px 18px}dialog{padding:24px;max-height:calc(100dvh - 90px)}.dialog-top h2{font-size:22px}}
@media(max-width:370px){main{padding-left:16px;padding-right:16px}.topbar{padding-left:16px;padding-right:16px}.page-heading h1{font-size:29px}.course-info{padding:21px}.mobile-brand{font-size:18px}.preview-label{font-size:8px}.lesson-row{gap:9px;padding:13px 11px}.lesson-row p{font-size:9px}.lesson-heading h1{font-size:27px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}dialog::backdrop{backdrop-filter:none}.mobile-nav{backdrop-filter:none;background:var(--nav-solid)}}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.inline-term{color:var(--accent);text-decoration:underline;text-decoration-color:var(--accent-border);text-underline-offset:4px}

@media(min-width:768px){.lesson-row h3{font-size:13px}.lesson-row p{font-size:11px}.course-info>p{font-size:12px}.progress-message{font-size:12px}.route-steps h3{font-size:12px}.route-steps p{font-size:11px}.lesson-article{font-size:15px}}
@media(min-width:550px) and (max-width:767px){.course-card{grid-template-columns:40% 60%}.course-art{min-height:315px;height:100%;border-bottom:0;border-right:1px solid var(--border-detail)}.course-info{padding:23px}.course-info h2{font-size:27px}.course-info>p{font-size:11px}.art-small{display:none}.art-sculpture{left:50%;transform:translate(-50%,-50%) scale(.82)}}
@media(max-width:549px){.course-art{height:155px;min-height:155px}.art-sculpture{top:40%;transform:translate(-50%,-50%) scale(.67)}.art-number{font-size:75px}.art-line{font-size:8px;top:15px}.art-small{font-size:7px;bottom:17px}.course-info{padding:21px}.course-info h2{font-size:27px}.course-info>p{font-size:11px}.course-meta{font-size:10px;margin-bottom:17px}.lesson-article{font-size:14px}.lesson-row h3{font-size:13px}}

/* Searchable glossary: wrap topics at narrow widths without horizontal scrolling. */
.glossary-filters{display:flex;flex-wrap:wrap;gap:8px;max-width:1000px;margin:26px 0 0}
.glossary-filter{display:inline-flex;align-items:center;gap:9px;min-height:44px;max-width:100%;padding:10px 14px;border:1px solid var(--border-strong);border-radius:10px;background:var(--surface-raised);color:var(--muted);font-size:12px;text-align:left}
.glossary-filter span{font-size:10px;opacity:.8}
.glossary-filter:hover{background:var(--surface-hover);color:var(--text)}
.glossary-filter[aria-pressed="true"]{background:var(--surface-select);border-color:var(--accent-border-strong);color:var(--accent)}
.glossary-filters+.search-field{margin:20px 0 14px;max-width:650px}
.term-search-status{font-size:11px;color:var(--muted);margin:0 0 8px}
.term-category{display:block;font-size:10px;color:var(--accent);margin-bottom:9px}
.term-card h2{overflow-wrap:anywhere;line-height:1.4}
.term-example{line-height:1.8}
.glossary-footnote{max-width:780px;margin-top:28px;padding-top:19px;border-top:1px solid var(--border-detail);color:var(--muted);font-size:11px;line-height:1.8}
@media(max-width:767px){.glossary-filters{gap:7px;margin-top:22px}.glossary-filter{padding:10px 12px;font-size:11px}.glossary-filters+.search-field{margin-top:18px}.term-card p{font-size:13px}.term-example{font-size:11px}}

/* Block exams and sequential learning. */
.block-exam-card{display:flex;align-items:center;justify-content:space-between;gap:22px;border:1px solid var(--border-strong);border-radius:13px;padding:22px;margin-top:16px;background:var(--surface-raised)}.block-exam-card h3{font-size:17px;margin:6px 0 8px}.block-exam-card p{max-width:550px;font-size:12px;color:var(--muted);line-height:1.8}.block-exam-card>a{flex-shrink:0}.exam-eyebrow{color:var(--accent);font-size:9px;letter-spacing:.7px}.block-exam-card.passed{border-color:var(--accent-border)}.locked-block .text-button{display:inline-flex;align-items:center;gap:8px;margin-top:12px;color:var(--accent);font-size:12px}.exam-heading{max-width:760px}.block-exam-form{max-width:780px;display:grid;gap:22px}.exam-question{border:1px solid var(--border-strong);border-radius:14px;padding:23px;min-width:0;background:var(--surface-raised)}.exam-question legend{font-size:17px;line-height:1.6;font-weight:500;max-width:100%;padding:0 8px;overflow-wrap:anywhere}.exam-question legend>span{display:block;font-size:10px;color:var(--accent);font-weight:400;margin-bottom:6px}.exam-options{display:grid;gap:10px;margin-top:10px}.exam-option{display:flex;align-items:flex-start;gap:12px;padding:15px;border:1px solid var(--border-strong);border-radius:10px;cursor:pointer;font-size:13px;line-height:1.8;color:var(--text-body);min-height:48px}.exam-option:hover{background:var(--surface-hover)}.exam-option:has(input:checked){background:var(--surface-select);border-color:var(--accent-border-strong);color:var(--text)}.exam-option input{accent-color:var(--accent);width:17px;height:17px;flex:0 0 17px;margin-top:3px}.exam-option span{min-width:0;overflow-wrap:anywhere}.exam-submit-row{display:flex;align-items:center;gap:23px;flex-wrap:wrap}.exam-submit-row .text-button{font-size:12px;color:var(--muted)}.block-exam-form .form-error{font-size:13px;color:var(--notice-text);line-height:1.7}.exam-result,.exam-feedback{max-width:780px;padding:26px;border:1px solid var(--border-strong);border-radius:14px;background:var(--surface-raised);margin-bottom:25px}.exam-result h2{font-size:24px;margin:12px 0}.exam-result p,.exam-feedback p{color:var(--muted);font-size:13px;line-height:1.9}.exam-result .primary-button{margin-top:23px}.exam-result>.icon{width:32px;height:32px;color:var(--accent)}.exam-result.passed,.exam-feedback.passed{border-color:var(--accent-border);background:var(--surface-accent)}.exam-feedback strong{font-size:16px}.exam-feedback p{margin-top:8px}.exam-preview-note{max-width:780px;padding:14px 18px;background:var(--surface-accent);font-size:12px;line-height:1.8;border-radius:9px;margin-bottom:24px;color:var(--muted)}
@media(max-width:767px){.block-exam-card{align-items:stretch;flex-direction:column;padding:19px;gap:15px}.block-exam-card .secondary-button{width:100%}.exam-question{padding:17px 13px}.exam-question legend{font-size:16px;padding:0 5px}.exam-option{padding:13px;font-size:13px}.exam-submit-row{align-items:stretch;flex-direction:column;gap:18px}.exam-submit-row .primary-button{width:100%}.exam-result,.exam-feedback{padding:21px}.exam-result h2{font-size:23px}}

body:not(.admin-page) .mobile-nav{grid-template-columns:repeat(5,minmax(0,1fr))}.lesson-materials{margin:28px 0}.lesson-materials h2{font-size:20px}.lesson-materials>a{display:flex;gap:12px;align-items:center;border:1px solid var(--border-strong);border-radius:10px;padding:15px;margin-top:10px;font-size:13px;color:var(--text);text-decoration:none}.lesson-materials>a>span:nth-child(2){flex:1;min-width:0;overflow-wrap:anywhere}.lesson-materials small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.lesson-materials .icon{color:var(--accent)}.lesson-ask-link{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-size:12px;margin-top:28px;min-height:44px}.learning-search{max-width:780px}.learning-search-results{max-width:850px;display:grid;gap:14px}.learning-result{display:block;padding:21px 23px;border:1px solid var(--border-detail);border-radius:12px;background:var(--surface-raised)}.learning-result:hover{border-color:var(--accent-border-strong);background:var(--surface-hover)}.learning-result h2{font-size:20px;line-height:1.5;letter-spacing:-.4px;overflow-wrap:anywhere}.learning-result-subtitle{display:block;font-size:11px;color:var(--muted);margin-top:6px}.learning-result p{font-size:12px;line-height:1.9;color:var(--text-body);margin-top:12px}.learning-result .term-category{font-size:10px;margin-bottom:7px}.lesson-video video{width:100%;max-height:550px;background:#000;border-radius:12px}
@media(max-width:767px){.learning-result{padding:19px 17px}.learning-result h2{font-size:18px}.lesson-materials>a{font-size:12px}}

@media(max-width:767px){.mobile-nav{grid-template-columns:repeat(6,minmax(0,1fr))}.mobile-nav a{font-size:8px;padding-left:1px;padding-right:1px}}