:root{color-scheme:dark;--bg:#10141c;--surface:#191f2b;--ink:#e4e9f2;--muted:#a3aec2;--line:#303849;--accent:#a6e3cb}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,sans-serif}header{display:flex;align-items:center;justify-content:space-between;padding:22px 5vw;border-bottom:1px solid var(--line);gap:20px}header span,.muted,footer{color:var(--muted);font-size:.85rem}.brand{font-size:24px;font-weight:750;color:var(--ink);text-decoration:none}.brand b{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:var(--bg);width:34px;height:34px;border-radius:10px}main{max-width:1200px;margin:auto;padding:42px 24px}h1{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:12px 0}h2{font-size:22px;line-height:1.4;margin:0 0 15px}.eyebrow{font-size:10px;letter-spacing:.2em;color:var(--accent);font-weight:700}.lead{color:var(--muted);margin-bottom:34px}.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px;margin-bottom:20px}#auth,#consent{max-width:620px}label{display:block;font-size:14px;font-weight:600;margin:16px 0}input,textarea{display:block;width:100%;margin-top:7px;padding:13px;border:1px solid var(--line);border-radius:10px;color:var(--ink);background:var(--bg);font:inherit}textarea{resize:vertical}button{cursor:pointer;border:1px solid transparent;border-radius:10px;padding:11px 17px;background:var(--accent);color:#10141c;font:600 14px/1.5 system-ui}button:disabled{opacity:.5;cursor:wait}.secondary{background:transparent;color:var(--ink);border-color:var(--line)}button:hover{filter:brightness(1.1)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:24px}.layout>aside{align-self:start}.toolbar,.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.toolbar{justify-content:space-between;margin-bottom:22px}.program-button{display:block;width:100%;text-align:left;margin:8px 0;overflow-wrap:anywhere}.program-button[aria-current=true]{border-color:var(--accent);color:var(--accent)}.material-row{width:100%;display:block;text-align:left;background:var(--surface);color:var(--ink);border:1px solid var(--line);padding:18px;margin:12px 0;overflow-wrap:anywhere}#error{border-left:3px solid #ffaaa8;padding:15px;background:#36292e}#status{color:var(--accent)}summary{cursor:pointer;font-weight:600}code{overflow-wrap:anywhere}pre{padding:18px;background:var(--bg);overflow:auto;border:1px solid var(--line);border-radius:12px}#reader{overflow-wrap:anywhere}#reader-content img{max-width:100%}#reader-content a{color:var(--accent)}#reader-content table{display:block;overflow:auto;border-collapse:collapse}th,td{border:1px solid var(--line);padding:8px}footer{padding:24px;text-align:center;border-top:1px solid var(--line)}.footer-note{margin-top:30px}[hidden]{display:none!important}@media(max-width:760px){.layout{grid-template-columns:1fr}main{padding:25px 16px}.card{padding:20px}header span{max-width:140px;text-align:right}.actions{gap:8px}.toolbar{align-items:flex-start}}

.choice{display:flex;align-items:flex-start;gap:12px;padding:14px;border:1px solid var(--line);border-radius:10px;overflow-wrap:anywhere}.choice input{width:20px;height:20px;flex:0 0 20px;margin:2px 0;accent-color:var(--accent)}fieldset{min-width:0}legend{color:var(--accent);font-size:13px;padding:0 8px}.markdown{overflow-wrap:anywhere}.markdown a{color:var(--accent)}.markdown table{display:block;overflow:auto}#lesson-reader{margin-top:24px}#lesson-reader textarea:disabled{opacity:.8}

.feedback{margin-top:22px;padding:18px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:12px;background:var(--bg)}.feedback h3,.feedback h4{margin:8px 0}.answer-correct{border-color:#69c99c;background:#17382d}.answer-incorrect{border-color:#ee9090;background:#3a222c}.answer-tag{font-size:12px;margin-left:auto;min-width:75px}.choice{flex-wrap:wrap}

.code-panel{border:1px solid var(--line);border-radius:12px;margin:18px 0;overflow:hidden;min-width:0}.code-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;background:var(--bg);font-size:13px}.code-panel pre{margin:0;border:0;border-radius:0}.code-panel details{padding:12px}.math-block,.mermaid-block{overflow:auto;max-width:100%;padding:18px}.mermaid-block svg{display:block;max-width:100%;height:auto;margin:auto}.content-warning{padding:12px;color:#f2bc92}.hljs-keyword,.hljs-literal,.hljs-selector-tag{color:#b9adf4}.hljs-string,.hljs-regexp,.hljs-addition{color:#a6e3cb}.hljs-number,.hljs-attr,.hljs-variable{color:#f2bc92}.hljs-title,.hljs-built_in,.hljs-type{color:#9fdfb8}.hljs-comment,.hljs-quote{color:#a3aec2;font-style:italic}.hljs-meta,.hljs-name,.hljs-tag{color:#b9adf4}.hljs-deletion{color:#ffaaa8}

.learning-callout{border-left:4px solid var(--accent);padding:18px 22px;margin:20px 0;background:var(--bg);border-radius:12px}.callout-example{border-color:var(--secondary)}.callout-attention{border-color:var(--highlight)}.learning-details,.learning-steps{border:1px solid var(--line);border-radius:16px;padding:18px;margin:20px 0}.learning-steps>button{margin:8px 10px 0 0}.learning-image{margin:20px 0}.image-zoom{padding:0;background:transparent;border:0;display:block;max-width:100%;cursor:zoom-in}.learning-image img{display:block;max-width:100%;max-height:520px;object-fit:contain}.learning-image figcaption{margin:10px 0;color:var(--muted)}.image-dialog{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:16px}.image-dialog::backdrop{background:#000b}.data-chart>svg{width:100%;height:auto;display:block}.data-chart details{overflow-x:auto}.chart-legend{display:flex;flex-wrap:wrap;gap:12px;list-style:none;padding:0}:root{--secondary:#b9adf4;--highlight:#f2bc92;--success:#9fdfb8;--card-bg:var(--surface);--background:var(--bg);--card-radius:16px;--mono-font:monospace}
.learning-details{padding:0;overflow:hidden;background:linear-gradient(120deg,color-mix(in srgb,var(--secondary) 9%,var(--card-bg)),var(--card-bg));border-color:color-mix(in srgb,var(--secondary) 30%,var(--line));border-radius:var(--card-radius)}.learning-details>summary{display:flex;align-items:center;gap:14px;padding:20px;list-style:none}.learning-details>summary::-webkit-details-marker{display:none}.details-symbol{display:grid;place-items:center;flex:0 0 38px;height:38px;border-radius:12px;color:var(--secondary);background:color-mix(in srgb,var(--secondary) 14%,transparent);font:700 20px var(--mono-font)}.details-labels{display:flex;flex-direction:column;gap:3px}.details-labels small{font-size:9px;letter-spacing:.16em;color:var(--secondary)}.details-labels>span{font-size:15px}.details-arrow{margin-left:auto;color:var(--secondary);font-size:24px}.learning-details[open] .details-arrow{transform:rotate(180deg)}.learning-details>div{padding:0 20px 16px;border-top:1px solid var(--line)}
.data-chart{padding:22px;margin:28px 0;border:1px solid var(--line);border-radius:var(--card-radius);background:color-mix(in srgb,var(--accent) 3%,var(--background));overflow:hidden}.data-chart>figcaption{color:var(--ink);font-size:17px;font-weight:650;margin:0 0 18px;padding-bottom:16px;border-bottom:1px solid var(--line)}.data-chart>figcaption:before{content:'ГРАФИК';display:block;color:var(--accent);font-size:9px;letter-spacing:.16em;margin-bottom:7px}.data-chart .chart-legend{margin:12px 0 18px;font-size:12px;gap:16px}.chart-legend li:before{content:'●';margin-right:7px}.data-chart>details{border-top:1px solid var(--line);margin-top:16px;padding-top:4px}.data-chart>details>summary{font-size:12px;color:var(--muted)}
.learning-image[data-align=center]{text-align:center}.learning-image[data-align=right]{text-align:right}.learning-image[data-align=center]>.image-zoom{margin-inline:auto}.learning-image[data-align=right]>.image-zoom{margin-left:auto}.image-dialog{width:94vw;height:92dvh;max-width:1400px;max-height:94dvh;margin:auto;padding:18px;overflow:hidden}.image-dialog[open]{display:flex;flex-direction:column;gap:14px}.image-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-shrink:0}.image-toolbar>span{color:var(--muted);font-size:13px;overflow-wrap:anywhere;min-width:0}.image-toolbar button{flex-shrink:0}.image-stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center}.image-dialog .image-stage img{width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;margin:0}.image-caption{flex-shrink:0;max-height:15vh;overflow:auto;margin:0;color:var(--muted);font-size:12px}


.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap;border:0!important}.blanks-text{line-height:3;white-space:pre-wrap;font-size:16px}.blanks-text .exercise-entry{display:inline;padding:0;border:0;margin:0 4px;background:none;white-space:normal}.blanks-text .blank-input{display:inline-block;vertical-align:baseline;width:var(--blank-width,10ch);max-width:min(24ch,100%);min-height:0;height:34px;margin:0;padding:3px 8px;border-radius:5px;border:1px solid var(--line);border-bottom:2px solid var(--accent);font:inherit;line-height:1.3;background:color-mix(in srgb,var(--accent) 5%,var(--input-bg));color:var(--ink)}
.exercise-hint,.association-status{font-size:12px;color:var(--muted)}.association-status{min-height:2em;margin:14px 0}.matching-board{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px}.match-column{display:flex;flex-direction:column;gap:14px;min-width:0}.match-column>div{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}.association-choice{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;min-height:66px;width:100%;padding:14px;text-align:left;font-size:14px;font-weight:500;white-space:normal;overflow-wrap:anywhere;background:var(--input-bg);color:var(--ink);border:1px solid var(--line);border-radius:var(--control-radius);margin:0}.association-choice[aria-pressed=true]{outline:2px solid var(--secondary);outline-offset:2px;background:color-mix(in srgb,var(--secondary) 12%,var(--input-bg))}.association-choice.is-paired{border-color:var(--accent)}.association-choice:disabled{opacity:1}.match-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.association-choice .option-verdict{margin:4px 0 0;max-width:none;font-size:10px}.category-board{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}.category-group{padding:12px;border:1px solid var(--line);border-radius:var(--card-radius);background:color-mix(in srgb,var(--secondary) 4%,var(--background));min-width:0}.category-group.is-target{border-style:dashed;border-color:var(--secondary)}.category-target{display:block;width:100%;text-align:left;background:transparent;color:var(--secondary);padding:8px;font-size:13px;border:1px solid transparent}.category-target:disabled{opacity:1}.category-items{display:flex;flex-direction:column;gap:10px;margin-top:10px}.category-empty{font-size:12px;color:var(--muted);text-align:center;padding:12px 0;margin:0}.association-reset{font-size:12px}
:root{--input-bg:var(--bg);--control-radius:10px;--danger:#ffaaa8}.ordering-list{list-style:decimal;padding-left:24px}.ordering-list li{display:flex;align-items:center;gap:8px;border:1px solid var(--line);padding:12px;margin:10px 0;border-radius:10px}.ordering-list li>span:first-child{flex:1;min-width:0;overflow-wrap:anywhere}.ordering-list button{padding:6px 12px}.order-confirm{display:flex;gap:12px;align-items:center}.order-confirm input{width:20px;margin:0}.option-correct{border-color:var(--success)!important}.option-wrong{border-color:var(--danger)!important}@media(max-width:600px){.matching-board{gap:30px}.category-board{grid-template-columns:1fr}.association-choice{padding:10px;font-size:12px}}
/* Workspace shell */
.signed-in #welcome{display:none}.signed-in main{max-width:1480px;padding-top:24px}.signed-in .layout{grid-template-columns:230px minmax(0,1fr);gap:36px}.signed-in .sidebar{position:sticky;top:24px;padding:20px}.sidebar h2{font-size:17px}.new-program{border-top:1px solid var(--line);padding-top:18px;margin-top:20px;font-size:13px}#space-nav{display:grid;gap:8px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}#space-nav button{text-align:left;background:transparent;color:var(--muted)}#space-nav button[aria-current=true]{background:#20382e;color:var(--accent);border-color:#395d50}#program-title{font-size:28px}.space-tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:28px 0}.space-tile{min-height:180px;padding:30px;text-align:left;font-size:26px;background:linear-gradient(130deg,#20382e,var(--surface));color:var(--ink);border:1px solid var(--line)}.space-tile:nth-child(2){background:linear-gradient(130deg,#302b43,var(--surface))}.group-grid{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.group-tile{background:var(--surface);color:var(--ink);border:1px solid var(--line)}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.dictionary-filters{display:grid;grid-template-columns:2fr 1fr;gap:18px}select{width:100%;padding:13px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font:inherit;margin-top:7px}.dictionary-entry{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin:12px 0;overflow:hidden}.dictionary-entry summary{padding:20px}.dictionary-entry summary span{font-size:18px}.dictionary-entry small{display:block;color:var(--muted);font-size:12px;margin:4px 0 0 18px}.entry-body{padding:0 22px 20px}.empty-state{padding:30px;border:1px dashed var(--line);border-radius:16px;color:var(--muted)}.practice-tile{margin:18px 0}.practice-question{margin-top:22px}.practice-question textarea{font-size:18px}.practice-nav{display:flex;justify-content:space-between;gap:15px}.practice-jumps{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.practice-jumps button{min-width:42px}.practice-jumps [aria-current=true]{outline:2px solid var(--accent)}.practice-jumps .answered{border-color:var(--accent)}progress{width:100%;height:6px;accent-color:var(--accent)}#lesson-space{background:transparent;border:0;padding:0}#lesson-space>h2{font-size:24px}#lessons-new,#lessons-history{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}#lessons-new .material-row,#lessons-history .material-row{min-height:100px;margin:0;padding:22px;font-size:15px}#lesson-space h3{margin-top:28px}#material-space>details{margin-top:24px}#dictionary-space{max-width:1000px}#settings-space .actions{margin-top:24px}#lesson-reader{max-width:1000px}.signed-in .toolbar{margin-bottom:24px}
@media(max-width:800px){.signed-in .layout{grid-template-columns:1fr;gap:20px}.signed-in .sidebar{position:static}.sidebar #programs{display:flex;overflow:auto;gap:8px}.sidebar .program-button{min-width:150px;width:auto}.sidebar #space-nav{display:flex;overflow:auto;margin-top:18px;padding-top:14px}.sidebar #space-nav button{white-space:nowrap}.space-tiles{gap:12px}.space-tile{font-size:20px;min-height:130px;padding:20px}.dictionary-filters{grid-template-columns:1fr}.dictionary-filters label{margin:5px 0}#lessons-new,#lessons-history{grid-template-columns:1fr}#program-title{font-size:24px}}
.layout>*{min-width:0}.sidebar{min-width:0;max-width:100%}#space-nav,#programs{max-width:100%}
body{font-family:var(--body-font,system-ui,sans-serif)}button,input,textarea,select{font-family:inherit}.card,.dictionary-entry,.material-row{border-radius:var(--card-radius,20px)}
body[data-pattern=grid]{background-image:linear-gradient(color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--accent) 7%,transparent) 1px,transparent 1px);background-size:36px 36px}body[data-pattern=dots]{background-image:radial-gradient(color-mix(in srgb,var(--accent) 18%,transparent) 1px,transparent 1px);background-size:22px 22px}
#lessons-new,#lessons-history{grid-template-columns:1fr;gap:12px}.learning-card{display:flex!important;align-items:center;gap:18px;flex-wrap:wrap;min-height:90px!important;padding:22px!important;transition:border-color .15s,transform .15s}.learning-card:hover{border-color:var(--accent);transform:translateY(-1px)}.learning-title{flex:1;min-width:min(200px,100%);font-size:17px}.learning-card small{flex-basis:100%;font-weight:400}.state-badge{font-size:11px;font-weight:600;border:1px solid var(--line);border-radius:999px;padding:5px 10px;white-space:nowrap;color:var(--muted);background:var(--bg)}.state-started{color:#f2bc92;border-color:#74543a}.state-submitted{color:#b9adf4;border-color:#5f547e}.state-reviewed{color:var(--accent);border-color:var(--accent)}.state-cancelled{color:#ffaaa8;border-color:#794c53}.history-divider{display:flex;align-items:center;gap:18px;margin:44px 0 22px!important;color:var(--muted);font-size:16px}.history-divider:after{content:'';height:1px;background:var(--line);flex:1}#space-nav button[aria-current=true]{background:color-mix(in srgb,var(--accent) 12%,var(--surface));border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}.space-tile,.space-tile:nth-child(2){background:linear-gradient(130deg,color-mix(in srgb,var(--accent) 14%,var(--surface)),var(--surface))}
#space-nav button img{vertical-align:middle;margin-right:10px}.brand b img{display:block}
@media(max-width:800px){.sidebar #space-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));overflow:visible}.sidebar #space-nav button{white-space:normal}}
.account-nav{display:grid;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}.account-nav button{text-align:left}.priority-picker,.invite-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.invite-row{align-items:center;justify-content:space-between}.priority-high[aria-pressed=true],.backlog-card.priority-high{border-color:#ef9696}.priority-middle[aria-pressed=true],.backlog-card.priority-middle{border-color:#d6b776}.priority-low[aria-pressed=true],.backlog-card.priority-low{border-color:#7ec3b0}.backlog-card{border-left-width:4px}.backlog-description{white-space:pre-wrap;overflow-wrap:anywhere}.priority-picker [aria-pressed=true]{background:var(--surface);color:var(--accent)}#backlog-space{max-width:1000px}