:root{--navy:#554e94;--navy-light:#8a3c8e;--navy-dark:#332f5c;--gold:#ff0f72;--gold-light:#ff4f95;--brand-gradient:linear-gradient(135deg, #554e94 0%, #933c8d 55%, #ff0f72 100%);--bg:#f5f6f9;--surface:#fff;--border:#dfe3ea;--text:#1c2430;--text-muted:#5b6472;--danger:#b3261e;--danger-bg:#fbeaea;--success:#1e7a3d;--success-bg:#e8f5ec;--warning-bg:#fdf3dd;--warning-text:#7a5b09;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Trebuchet MS,Segoe UI,Verdana,Arial,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#0b1424;--surface:#132038;--border:#223252;--text:#e7ebf2;--text-muted:#98a3b6;--danger-bg:#3a1616;--success-bg:#123120;--warning-bg:#3a2e0f;--warning-text:#e8c467}}*{box-sizing:border-box}body{margin:0}#root{min-height:100svh}button,input,select,textarea{font-family:inherit;font-size:14px}.app-shell{flex-direction:column;min-height:100svh;display:flex}.app-header{background:var(--brand-gradient);color:#fff;flex-wrap:wrap;align-items:center;gap:24px;height:64px;padding:0 24px;display:flex}.app-header-brand{white-space:nowrap;align-items:center;gap:10px;font-weight:600;display:flex}.brand-logo{background-color:#fff;background-position:50%;background-repeat:no-repeat;background-size:contain;border-radius:50%;flex-shrink:0;width:56px;height:56px;box-shadow:0 0 0 2px #ffffff59}.app-tabs{flex:1;gap:4px;display:flex}.app-tab{color:#ffffffbf;cursor:pointer;background:0 0;border:none;border-radius:6px;padding:10px 14px;font-weight:500}.app-tab:hover{color:#fff;background:#ffffff14}.app-tab-active{background:var(--gold);color:var(--navy-dark)}.app-header-user{white-space:nowrap;align-items:center;gap:10px;font-size:13px;display:flex}.role-badge{text-transform:uppercase;letter-spacing:.04em;background:#ffffff1f;border-radius:999px;padding:3px 8px;font-size:11px;font-weight:600}.app-main{flex:1;width:100%;max-width:1400px;margin:0 auto;padding:24px}.full-page-status{min-height:100svh;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.auth-screen{background:var(--brand-gradient);justify-content:center;align-items:center;min-height:100svh;padding:16px;display:flex}.auth-card{background:var(--surface);border-radius:14px;width:100%;max-width:380px;padding:36px 32px;box-shadow:0 20px 50px #00000059}.auth-brand{text-align:center;margin-bottom:24px}.auth-logo{width:140px;height:auto;margin:0 auto 4px;display:block}.auth-brand h1{color:var(--text);margin:0;font-size:20px}.auth-brand p{color:var(--text-muted);margin:2px 0 0;font-size:13px}.auth-footnote{color:var(--text-muted);text-align:center;margin-top:16px;font-size:12px}.field{color:var(--text-muted);flex-direction:column;gap:4px;margin-bottom:14px;font-size:13px;font-weight:500;display:flex}.field input,.field select,.field textarea{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:9px 11px;font-weight:400}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--gold);outline-offset:1px}.field-hint{font-size:12px;font-weight:400}.field-hint-warning{color:var(--warning-text)}.field-wide{grid-column:1/-1}.link-btn{color:var(--navy-light);cursor:pointer;font-size:inherit;background:0 0;border:none;padding:0;text-decoration:underline}@media (prefers-color-scheme:dark){.link-btn{color:var(--gold-light)}}.btn{cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:9px 16px;font-weight:600}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--navy);color:#fff}.btn-primary:hover:not(:disabled){background:var(--navy-light)}.btn-secondary{color:var(--text);border:1px solid var(--border);background:0 0}.btn-secondary:hover:not(:disabled){background:var(--bg)}.btn-gold{background:var(--gold);color:var(--navy-dark)}.btn-gold:hover:not(:disabled){background:var(--gold-light)}.btn-danger{background:var(--danger);color:#fff}.btn-small{padding:6px 12px;font-size:12px}.btn-block{width:100%}.btn-icon{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-radius:6px;padding:4px 8px;font-size:16px}.btn-icon:hover{background:var(--bg)}.btn-icon-danger:hover{color:var(--danger)}.banner{border-radius:8px;margin-bottom:16px;padding:12px 14px;font-size:13px}.banner ul{margin:6px 0 0;padding-left:18px}.banner-error{background:var(--danger-bg);color:var(--danger)}.banner-warning{background:var(--warning-bg);color:var(--warning-text)}.toast-stack{z-index:1000;flex-direction:column;gap:8px;max-width:360px;display:flex;position:fixed;bottom:20px;right:20px}.toast{border-radius:8px;justify-content:space-between;align-items:flex-start;gap:10px;padding:12px 14px;font-size:13px;display:flex;box-shadow:0 8px 24px #0003}.toast-error{background:var(--danger);color:#fff}.toast-success{background:var(--success);color:#fff}.toast button{color:inherit;cursor:pointer;background:0 0;border:none;font-size:16px;line-height:1}.subtabs{border-bottom:1px solid var(--border);gap:4px;margin-bottom:12px;display:flex}.subtab{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-right:16px;padding:8px 4px;font-size:13px;font-weight:600}.subtab:hover{color:var(--text)}.subtab-active{color:var(--navy);border-bottom-color:var(--gold)}.roster-heading{margin:0 0 12px;font-size:16px}.roster-toolbar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;display:flex}.roster-toolbar select{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:8px 10px}.search-input{border:1px solid var(--border);background:var(--surface);min-width:220px;color:var(--text);border-radius:8px;flex:1;padding:9px 12px}.toolbar-spacer{flex:1}.roster-meta{flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:16px;display:flex}.student-count{color:var(--text-muted);font-size:13px;font-weight:600}.empty-state{text-align:center;color:var(--text-muted);background:var(--surface);border:1px dashed var(--border);border-radius:10px;padding:48px 16px}.table-scroll{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow-x:auto}.student-table{border-collapse:collapse;width:100%;min-width:720px;font-size:13px}.student-table th,.student-table td{text-align:left;border-bottom:1px solid var(--border);white-space:nowrap;padding:10px 12px}.student-table thead th{background:var(--bg);color:var(--text-muted);font-weight:600;position:sticky;top:0}.sortable-th{cursor:pointer;-webkit-user-select:none;user-select:none}.sortable-th:hover{color:var(--navy)}.sort-arrow{color:var(--gold)}.actions-th,.actions-td{text-align:right}.student-table tbody tr:hover{background:#0f24470a}.action-badge{text-transform:uppercase;border-radius:999px;padding:2px 8px;font-size:11px;font-weight:700;display:inline-block}.action-insert{background:var(--success-bg);color:var(--success)}.action-update{background:var(--warning-bg);color:var(--warning-text)}.action-delete{background:var(--danger-bg);color:var(--danger)}.status-select{text-transform:uppercase;letter-spacing:.03em;cursor:pointer;border:none;border-radius:999px;padding:4px 10px;font-size:11px;font-weight:700}.status-active{background:var(--success-bg);color:var(--success)}.status-break{background:var(--warning-bg);color:var(--warning-text)}.status-left{background:var(--danger-bg);color:var(--danger)}.detail-table{border-collapse:collapse;margin:6px 0;font-size:12px}.detail-table th,.detail-table td{border:1px solid var(--border);white-space:normal;padding:4px 10px}.activity-detail-row td{background:var(--bg)}.modal-overlay{z-index:900;background:#0917308c;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-card{background:var(--surface);border-radius:12px;width:100%;max-height:90svh;padding:24px;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.modal-small{max-width:400px}.modal-large{max-width:720px}.modal-card h2{margin-top:0}.modal-actions{justify-content:flex-end;gap:10px;margin-top:16px;display:flex}.form-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:4px 16px;display:grid}.error-boundary{background:var(--bg);justify-content:center;align-items:center;min-height:100svh;padding:16px;display:flex}.error-boundary-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:12px;max-width:480px;padding:32px}.error-boundary-card pre{text-align:left;white-space:pre-wrap;color:var(--text-muted);background:var(--bg);border-radius:6px;margin-top:16px;padding:10px;font-size:12px}@media (width<=720px){.app-header{flex-direction:column;align-items:stretch;gap:10px;height:auto;padding:12px 16px}.app-tabs{order:3;overflow-x:auto}.app-header-user{order:2;justify-content:space-between}.app-main{padding:14px}.form-grid{grid-template-columns:1fr}.modal-card{padding:18px}}