:root{--bg:#f6f7f9;--surface:#ffffff;--border:#e3e6ea;--text:#14181f;--muted:#5f6774;--accent:#2f5bd7;--accent-soft:#eaf0ff;--danger:#b42318;--success:#067647;--warning:#b54708;--radius:10px;--sidebar:244px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;font-size:15px;line-height:1.5}a{color:inherit;text-decoration:none}.layout{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;gap:18px}.brand{font-weight:650;font-size:17px;padding:0 8px}.brand small{display:block;color:var(--muted);font-weight:400;font-size:12px}.nav{display:flex;flex-direction:column;gap:2px}.nav a{padding:8px 10px;border-radius:8px;color:var(--muted);font-size:14px}.nav a:hover{background:var(--bg);color:var(--text)}.nav a[aria-current=page]{background:var(--accent-soft);color:var(--accent);font-weight:550}.main{display:flex;flex-direction:column;min-width:0}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:var(--surface);border-bottom:1px solid var(--border)}.topbar .who{font-size:13px;color:var(--muted);text-align:right}.topbar .who strong{display:block;color:var(--text);font-weight:550}.content{padding:24px;display:flex;flex-direction:column;gap:20px}h1{font-size:22px}h1,h2{margin:0}h2{font-size:16px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:14px;gap:14px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.card .label{color:var(--muted);font-size:13px}.card .value{font-size:26px;font-weight:620;margin-top:4px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.panel header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);flex-wrap:wrap}.panel .body{padding:16px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{padding:10px 16px;text-align:start;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:550;font-size:12px;text-transform:uppercase;letter-spacing:.03em}tbody tr:last-child td{border-bottom:none}tbody tr:hover{background:var(--bg)}.filters{display:flex;gap:8px;flex-wrap:wrap}input[type=search],input[type=text],select{padding:7px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);font:inherit;color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.button{display:inline-block;padding:7px 12px;border-radius:8px;border:1px solid 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a[aria-current=page]{color:var(--accent);border-bottom-color:var(--accent);font-weight:550}.definition{display:grid;grid-template-columns:180px 1fr;grid-gap:8px 16px;gap:8px 16px;font-size:14px}.definition dt{color:var(--muted)}.definition dd{margin:0}.error-box{border:1px solid #fecdca;background:#fef3f2;color:var(--danger);padding:16px;border-radius:var(--radius)}.error-box code{font-size:12px;color:var(--muted)}@media (max-width:860px){.layout{grid-template-columns:1fr}.sidebar{align-items:center;overflow-x:auto;border-right:none;border-bottom:1px solid var(--border)}.nav,.sidebar{flex-direction:row}.definition{grid-template-columns:1fr}}.calendar{overflow-x:auto;border-radius:var(--radius)}.calendar-grid{border-collapse:collapse;width:100%;min-width:720px;table-layout:fixed}.calendar-grid td,.calendar-grid th{border:1px solid var(--border);vertical-align:top;padding:2px}.calendar-grid thead th{background:var(--surface);font-size:12px;padding:8px 4px}.calendar-grid .time-col{width:64px;font-size:11px;color:var(--muted);text-align:end;-webkit-padding-end:8px;padding-inline-end:8px}.calendar-grid tbody td{height:24px}.lesson-card{display:flex;flex-direction:column;gap:1px;background:var(--accent-soft);border:1px solid #c7d5f8;border-radius:6px;padding:4px 6px;font-size:11px;cursor:-webkit-grab;cursor:grab}.lesson-card:active{cursor:-webkit-grabbing;cursor:grabbing}.lesson-card .muted{color:var(--muted)}.lesson-card .card-footer{display:flex;gap:4px;margin-top:2px;flex-wrap:wrap}.lesson-card .badge{font-size:10px;padding:0 5px}.lesson-card.status-cancelled,.lesson-card.status-instructor_cancelled,.lesson-card.status-student_cancelled{background:#fef3f2;border-color:#fecdca;opacity:.75}.lesson-card.status-completed{background:#ecfdf3;border-color:#abefc6}.month-grid{min-width:640px;table-layout:fixed}.month-grid .month-cell{height:76px;padding:0}.month-grid .month-cell a{display:flex;flex-direction:column;gap:6px;height:100%;padding:6px;text-decoration:none;color:inherit}.month-grid .month-cell a:hover{background:var(--accent-soft)}.month-grid .month-day{font-size:12px;font-weight:600}.month-grid .month-cell.outside{background:var(--bg)}.month-grid .month-cell.outside .month-day{color:var(--muted);font-weight:400}.month-grid .month-cell.today{outline:2px solid var(--accent);outline-offset:-2px}.resource-grid{min-width:1400px}.resource-grid .resource-col{width:150px;font-size:12px;text-align:start;background:var(--surface);position:-webkit-sticky;position:sticky;inset-inline-start:0}.resource-grid tbody td{height:56px}.resource-grid .lesson-card{font-size:10px;padding:3px 4px}.scope-dialog{border:1px solid var(--border);background:var(--surface);border-radius:var(--radius);padding:14px 16px;margin-bottom:12px;display:flex;flex-direction:column;gap:8px}.scope-dialog .scope-options{display:flex;flex-direction:column;gap:6px;font-size:14px}.scope-dialog 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6px;border-radius:6px;font-size:12px;word-break:break-all}.inbox{display:grid;grid-template-columns:300px 1fr 280px;grid-gap:14px;gap:14px;align-items:start}.inbox-context,.inbox-list,.inbox-thread{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px}.inbox-list ul{list-style:none;margin:0;padding:0}.inbox-list li{border-bottom:1px solid var(--border)}.inbox-list li:last-child{border-bottom:none}.inbox-list li a{display:block;padding:10px 8px;border-radius:8px}.inbox-list li a:hover{background:var(--bg)}.inbox-list li.selected a{background:var(--accent-soft)}.inbox-list .row{display:flex;justify-content:space-between;gap:8px;align-items:center}.inbox-filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.inbox-filters a{text-decoration:none}.thread-header{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;padding-bottom:10px;border-bottom:1px solid 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