:root{--bg:#f6f7fb;--panel:#fff;--text:#151827;--muted:#7a8194;--line:#e7e9f0;--primary:#635bff;--primary2:#00c2ff;--primary-soft:#ebe9ff;--green:#18a058;--green-soft:#e9f8ef;--orange:#f59e0b;--orange-soft:#fff4dc;--red:#e5484d;--red-soft:#ffecec;--blue-soft:#eaf3ff;--shadow:0 20px 50px #15182714;--radius:24px}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}.app{grid-template-columns:280px 1fr;min-height:100vh;display:grid}.sidebar{color:#fff;background:#101223;flex-direction:column;gap:28px;padding:28px 22px;display:flex}.logo{align-items:center;gap:12px;font-size:21px;font-weight:900;display:flex}.logoMark{background:linear-gradient(135deg,#635bff,#00c2ff);border-radius:14px;place-items:center;width:42px;height:42px;display:grid;box-shadow:0 12px 30px #635bff59}.nav{flex-direction:column;gap:8px;display:flex}.nav a{color:#ffffffb8;border-radius:16px;align-items:center;gap:10px;padding:13px 14px;font-weight:700;display:flex}.nav a.active,.nav a:hover{color:#fff;background:#ffffff1a}.teacherCard{background:#ffffff14;border:1px solid #ffffff1f;border-radius:20px;margin-top:auto;padding:16px}.teacherCard small{color:#ffffff8c}main{min-width:0;padding:30px}.topbar{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:28px;display:flex}h1{letter-spacing:-.04em;margin:0;font-size:34px}.subtitle{color:var(--muted);margin-top:6px}.actions{flex-wrap:wrap;gap:12px;display:flex}.button,button{cursor:pointer;border:0;border-radius:16px;align-items:center;gap:8px;padding:13px 18px;font-size:14px;font-weight:900;display:inline-flex}.btnPrimary{background:var(--primary);color:#fff;box-shadow:0 12px 28px #635bff40}.btnSecondary{color:var(--text);border:1px solid var(--line);background:#fff}.grid4{grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:22px;display:grid}.grid3{grid-template-columns:1.2fr .9fr .9fr;gap:18px;margin-bottom:22px;display:grid}.grid2{grid-template-columns:1fr 1fr;gap:18px;margin-bottom:22px;display:grid}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.metricTitle{color:var(--muted);font-size:13px;font-weight:800}.metricValue{letter-spacing:-.04em;margin-top:8px;font-size:34px;font-weight:950}.metricNote{color:var(--green);margin-top:8px;font-size:13px;font-weight:800}.sectionTitle{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.sectionTitle h2{letter-spacing:-.02em;margin:0;font-size:20px}.pill{background:var(--primary-soft);color:var(--primary);white-space:nowrap;border-radius:999px;padding:7px 11px;font-size:12px;font-weight:900}.pill.green{background:var(--green-soft);color:var(--green)}.pill.orange{background:var(--orange-soft);color:#a15c00}.pill.red{background:var(--red-soft);color:var(--red)}.list{flex-direction:column;gap:12px;display:flex}.row{border:1px solid var(--line);background:#fff;border-radius:18px;grid-template-columns:44px 1fr auto;align-items:center;gap:13px;padding:12px;display:grid}.avatar{background:var(--blue-soft);border-radius:16px;place-items:center;width:44px;height:44px;font-weight:950;display:grid}.row h3{margin:0;font-size:15px}.row p{color:var(--muted);margin:3px 0 0;font-size:13px}.activity{flex-direction:column;gap:14px;display:flex}.activityItem{gap:12px;display:flex}.dot{background:var(--primary);border-radius:50%;width:10px;height:10px;margin-top:6px}.activityItem strong{display:block}.activityItem span{color:var(--muted);font-size:13px}.summaryBox{background:linear-gradient(135deg,#f4f2ff,#eef8ff);border:1px solid #dedcff;border-radius:22px;padding:18px;line-height:1.55}.formGrid{grid-template-columns:1fr 1fr;gap:14px;display:grid}label{color:var(--muted);margin-bottom:8px;font-size:13px;font-weight:900;display:block}input,select,textarea{border:1px solid var(--line);width:100%;font:inherit;color:var(--text);background:#fff;border-radius:15px;padding:13px 14px}textarea{resize:vertical;min-height:112px}.full{grid-column:1/-1}.bars{flex-direction:column;gap:14px;display:flex}.barRow{grid-template-columns:110px 1fr 38px;align-items:center;gap:12px;font-size:13px;font-weight:900;display:grid}.bar{background:#eef0f6;border-radius:999px;height:10px;overflow:hidden}.bar span{background:linear-gradient(90deg,#635bff,#00c2ff);border-radius:999px;height:100%;display:block}.errorCard{border:1px solid var(--line);background:#fff;border-radius:18px;padding:14px}.wrong{color:var(--red);font-weight:950}.right{color:var(--green);font-weight:950}.toolbar{flex-wrap:wrap;gap:12px;margin-bottom:18px;display:flex}.search{max-width:360px}.table{border-collapse:separate;border-spacing:0 10px;width:100%}.table th{text-align:left;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:12px}.table td{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;padding:14px}.table td:first-child{border-left:1px solid var(--line);border-radius:16px 0 0 16px}.table td:last-child{border-right:1px solid var(--line);border-radius:0 16px 16px 0}.kpi{flex-wrap:wrap;gap:10px;display:flex}.kpi span{border:1px solid var(--line);background:#f8f9fd;border-radius:14px;padding:10px 12px;font-weight:800}.chartFake{align-items:end;gap:12px;height:260px;padding-top:20px;display:flex}.chartBar{background:linear-gradient(#635bff,#00c2ff);border-radius:14px 14px 6px 6px;flex:1;min-height:40px}.muted{color:var(--muted)}@media (max-width:1100px){.app{grid-template-columns:1fr}.sidebar{position:static}.grid4,.grid3,.grid2,.formGrid{grid-template-columns:1fr}.topbar{flex-direction:column}.table{display:block;overflow:auto}}