:root{--nav:#111827;--ink:#182033;--muted:#71798b;--bg:#f5f6fa;--line:#e5e8ef;--purple:#6747ee}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);display:grid;grid-template-columns:220px 1fr;min-height:100vh}button,input,textarea,select{font:inherit}aside{background:var(--nav);color:#fff;padding:28px 20px;display:flex;flex-direction:column;height:100vh;position:sticky;top:0}.logo{width:38px;height:38px;display:grid;place-items:center;background:var(--purple);border-radius:10px;color:#fff;text-decoration:none;font-weight:800}aside h2{font-size:16px;margin:19px 0 35px}nav{display:grid;gap:7px}nav button{border:0;background:none;color:#929bad;text-align:left;border-radius:8px;padding:11px 12px;cursor:pointer}nav button.active,nav button:hover{background:#232d3f;color:#fff}aside>a:last-child{margin-top:auto;color:#aeb6c7;text-decoration:none;font-size:11px}main{min-width:0}header{height:95px;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 4vw}header small,.page-title small,.welcome small{font-size:9px;letter-spacing:.15em;color:#8b93a4;font-weight:750}header h1{font-size:24px;margin:7px 0}.profile{width:39px;height:39px;border-radius:50%;background:#eae5ff;color:#5d43cf;display:grid;place-items:center;font-size:11px;font-weight:800}#view{padding:32px 4vw}.welcome{border-radius:16px;background:linear-gradient(120deg,#1a2337,#364464);color:#fff;padding:32px 38px;display:flex;justify-content:space-between;align-items:center}.welcome h2{font-size:28px;margin:10px 0}.welcome p{color:#bdc6d8;margin:0}.welcome>b{font-size:38px;text-align:center}.welcome>b span{display:block;font-size:10px;color:#aeb9cc;font-weight:400}.columns{display:grid;grid-template-columns:1.3fr 1fr;gap:18px;margin-top:19px}.card,.lesson,.ask-card,.report-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:22px}.card-head{display:flex;justify-content:space-between}.card-head h3{margin:0}.card-head span{font-size:9px;color:#7257df;background:#f0edff;padding:6px 8px;border-radius:15px}.task{display:flex;align-items:center;gap:11px;padding:15px 0;border-bottom:1px solid var(--line)}.task i{width:9px;height:9px;border-radius:50%;background:#e2a335}.task div{display:grid;gap:4px}.task small{color:var(--muted);font-size:10px}.task button,.secondary{margin-left:auto;border:0;background:#eeeaff;color:#5b42cd;padding:7px 10px;border-radius:7px;cursor:pointer;font-size:10px}.task.completed{opacity:.65}.card ol,#answer ol{padding-left:22px;color:#4f586b;font-size:12px;line-height:1.65}.card li,#answer li{padding:4px}.secondary{margin:15px 0 0}.empty{text-align:center;color:var(--muted);padding:35px}.page-title h2{font-size:32px;margin:9px 0}.page-title p{color:var(--muted)}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px;margin-top:28px}.lesson>span{font-size:9px;color:#765be4}.lesson h3{font-size:17px}.lesson p,.lesson li{color:var(--muted);font-size:11px;line-height:1.55}.lesson ul{padding-left:18px;min-height:110px}.lesson button,.ask-card button,.report-card button{border:0;background:var(--purple);color:#fff;padding:11px 14px;border-radius:7px;cursor:pointer}.lesson button:disabled{background:#3c9572}.ask-card{max-width:800px;margin-top:25px}.ask-card form{display:flex;gap:9px}.ask-card input{flex:1;border:1px solid var(--line);padding:13px;border-radius:8px}.ask-card #answer{margin-top:22px;border-top:1px solid var(--line);padding-top:15px}.ask-card #answer small{color:var(--muted)}.report-card{max-width:720px;margin-top:25px;display:grid;gap:18px}.report-card label{display:grid;gap:8px;font-size:11px;font-weight:700}.report-card select,.report-card textarea{border:1px solid var(--line);border-radius:8px;padding:12px;resize:vertical}.report-card small{color:var(--muted);font-size:9px}#toast{position:fixed;bottom:24px;left:50%;background:#182033;color:#fff;padding:12px 18px;border-radius:8px;opacity:0;transform:translateY(15px);transition:.2s;font-size:11px}#toast.show{opacity:1;transform:none}@media(max-width:850px){body{grid-template-columns:1fr}aside{height:auto;position:static;flex-direction:row;align-items:center;gap:15px;padding:12px}aside h2,aside>a:last-child{display:none}nav{display:flex;overflow:auto}.columns,.lesson-grid{grid-template-columns:1fr}header{height:80px}.welcome{padding:25px}.welcome>b{display:none}}