:root{--bg:#0b0f1a;--surface:#131a2a;--surface-2:#1b2438;--line:#27324a;--text-hi:#eef2f9;--text:#c3cbdc;--text-dim:#8794ad;--accent:#4fd1c5;--accent-dim:#2c8b83;--danger:#f2777a;--warn:#f0b862;--ok:#7bd88f;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}h1,h2,h3{color:var(--text-hi);margin:0 0 12px;line-height:1.25}h1{font-size:22px}h2{font-size:18px}h3{font-size:15px}a{color:var(--accent)}button{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--surface-2);color:var(--text-hi);border-radius:8px;padding:8px 14px;transition:border-color .15s,background .15s}button:hover:not(:disabled){border-color:var(--accent-dim)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent);color:#06231f;border-color:var(--accent);font-weight:600}button.ghost{background:0 0}button.danger{color:var(--danger)}input,select,textarea{font:inherit;background:var(--bg);color:var(--text-hi);border:1px solid var(--line);border-radius:8px;width:100%;padding:8px 10px}input:focus,select:focus,textarea:focus{border-color:var(--accent-dim);outline:none}label{color:var(--text-dim);margin-bottom:4px;font-size:13px;display:block}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);padding:9px 10px}th{color:var(--text-dim);font-size:13px;font-weight:600}td{color:var(--text)}tbody tr:hover{background:var(--surface-2)}.shell{min-height:100vh;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--line);flex-direction:column;flex:0 0 216px;gap:4px;width:216px;padding:20px 14px;display:flex}.brand{align-items:center;gap:9px;margin-bottom:18px;display:flex}.brand strong{color:var(--text-hi);font-size:15px}.brand span{color:var(--text-dim);font-size:12px;font-weight:400;display:block}.nav-item{text-align:left;width:100%;color:var(--text);background:0 0;border:none;border-radius:8px;padding:9px 11px;font-size:14px;display:block}.nav-item:hover{background:var(--surface-2)}.nav-item.active{background:var(--surface-2);color:var(--accent);font-weight:600}.sidebar-foot{border-top:1px solid var(--line);margin-top:auto;padding-top:14px}.sidebar-foot .who{color:var(--text-hi);font-size:13px}.sidebar-foot .org{color:var(--text-dim);margin-bottom:10px;font-size:12px}.main{flex:1;min-width:0;padding:26px 30px}.page-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:18px;display:flex}.page-head p{color:var(--text-dim);margin:0;font-size:13px}.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:16px;padding:18px}.grid{gap:14px;display:grid}.grid.cols-3{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}.grid.cols-4{grid-template-columns:repeat(auto-fill,minmax(165px,1fr))}.stat{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:14px}.stat .value{color:var(--text-hi);font-size:26px;font-weight:650;line-height:1.1}.stat .label{color:var(--text-dim);margin-top:3px;font-size:12px}.classroom-card{text-align:left;width:100%;padding:16px}.classroom-card h3{margin-bottom:2px}.classroom-card .meta{color:var(--text-dim);font-size:12px}.bar{background:var(--surface-2);border-radius:3px;height:6px;margin-top:8px;overflow:hidden}.bar>i{background:var(--accent);height:100%;display:block}.pill{border:1px solid var(--line);border-radius:99px;padding:2px 9px;font-size:12px;display:inline-block}.pill.ok{color:var(--ok);border-color:#2f5a3d}.pill.warn{color:var(--warn);border-color:#5c4728}.pill.bad{color:var(--danger);border-color:#5e2f31}.pill.mut{color:var(--text-dim)}.row{flex-wrap:wrap;align-items:flex-end;gap:10px;display:flex}.row>*{flex:180px}.row>.tight{flex:none}.msg{border-radius:9px;margin-bottom:14px;padding:10px 13px;font-size:14px}.msg.err{color:var(--danger);background:#2b1618;border:1px solid #5e2f31}.msg.ok{color:var(--ok);background:#14261a;border:1px solid #2f5a3d}.empty{color:var(--text-dim);padding:18px 0;font-size:14px}.login-wrap{place-items:center;min-height:100vh;padding:20px;display:grid}.login-box{width:100%;max-width:360px}.login-box .field{margin-bottom:13px}.picker{border:1px solid var(--line);border-radius:9px;max-height:260px;padding:8px;overflow-y:auto}.picker label{color:var(--text);cursor:pointer;align-items:center;gap:9px;margin:0;padding:5px 4px;font-size:13px;display:flex}.picker input[type=checkbox]{width:auto}.scroll-x{overflow-x:auto}.cell-actions{justify-content:space-between;align-items:center;gap:10px;display:flex}.note-btn{white-space:nowrap;padding:3px 10px;font-size:12px}.modal-back{z-index:20;background:#03060ca8;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.modal{width:100%;max-width:560px;max-height:calc(100vh - 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