:root{--color-primary:#0065b0;--color-primary-dark:#004d87;--color-primary-light:#eaf3fb;--color-black:#14161a;--color-bg:#f3f5f8;--color-card:#fff;--color-border:#e5e8ec;--color-text:#1a1d22;--color-text-muted:#6b7280;--color-danger:#c0392b;--color-danger-bg:#fbeeec;--color-success:#1e8449;--color-success-bg:#e9f7ef;--color-warning:#b7791f;--color-warning-bg:#fdf3e3;--shadow-sm:0 1px 2px #1018280d;--shadow-md:0 2px 8px #1018280f, 0 1px 2px #1018280a;--shadow-lg:0 8px 24px #1018281a;--radius:12px;--radius-sm:8px}*{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-dark);text-decoration:underline}.app-shell{min-height:100vh;display:flex}.sidebar{width:252px;color:var(--color-text);border-right:1px solid var(--color-border);background:#fff;flex-direction:column;flex-shrink:0;display:flex}.sidebar-logo{border-bottom:1px solid var(--color-border);padding:22px 20px}.sidebar-logo img{max-width:100%;height:auto;display:block}.sidebar-nav{flex-direction:column;flex:1;gap:2px;padding:16px 12px;display:flex}.sidebar-nav a{color:var(--color-text-muted);border-radius:var(--radius-sm);align-items:center;gap:12px;padding:10px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:background-color .15s,color .15s;display:flex}.sidebar-nav a svg{opacity:.8;flex-shrink:0}.sidebar-nav a:hover{background:var(--color-bg);color:var(--color-text);text-decoration:none}.sidebar-nav a:hover svg{opacity:1}.sidebar-nav a.active{color:var(--color-primary);background:var(--color-primary-light);font-weight:600}.sidebar-nav a.active svg{opacity:1}.sidebar-footer{border-top:1px solid var(--color-border);justify-content:space-between;align-items:center;gap:8px;padding:16px 20px;font-size:13px;display:flex}.sidebar-footer .user-chip{color:var(--color-text);align-items:center;gap:8px;min-width:0;font-weight:600;display:flex}.sidebar-footer .user-chip .avatar{background:var(--color-primary-light);width:26px;height:26px;color:var(--color-primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.sidebar-footer .user-chip span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.sidebar-footer button{color:var(--color-text-muted);cursor:pointer;border-radius:var(--radius-sm);background:0 0;border:none;align-items:center;padding:4px;font-size:13px;transition:color .15s,background-color .15s;display:flex}.sidebar-footer button:hover{color:var(--color-danger);background:var(--color-danger-bg)}.main{flex-direction:column;flex:1;min-width:0;display:flex}.topbar{border-bottom:1px solid var(--color-border);background:#fff;padding:18px 32px}.topbar h1{color:var(--color-black);letter-spacing:-.01em;margin:0;font-size:21px;font-weight:700}.content{flex:1;padding:28px 32px}.card{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:22px}.btn{border-radius:var(--radius-sm);cursor:pointer;border:1px solid #0000;align-items:center;gap:6px;padding:9px 16px;font-size:14px;font-weight:600;text-decoration:none;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 50ms;display:inline-flex}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark);color:#fff;text-decoration:none}.btn-secondary{color:var(--color-text);border-color:var(--color-border);background:#fff}.btn-secondary:hover:not(:disabled){background:var(--color-bg);border-color:#d3d8de;text-decoration:none}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){color:#fff;background:#9c2a20;text-decoration:none}.btn-sm{padding:6px 11px;font-size:13px}.form-group{margin-bottom:16px}.form-group label{color:var(--color-text);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.form-group input,.form-group select,.form-group textarea{border:1px solid var(--color-border);border-radius:var(--radius-sm);width:100%;color:var(--color-text);background:#fff;padding:9px 12px;font-family:inherit;font-size:14px;transition:border-color .15s,box-shadow .15s}.form-group textarea{resize:vertical;min-height:84px;line-height:1.5}.form-group input:hover,.form-group select:hover,.form-group textarea:hover{border-color:#c7cdd4}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #0065b024}.form-group input:disabled{background:var(--color-bg);color:var(--color-text-muted)}.form-row{gap:16px;display:flex}.form-row .form-group{flex:1}.form-actions{gap:10px;margin-top:20px;display:flex}table{border-collapse:collapse;width:100%;font-size:14px}thead th{text-align:left;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);border-bottom:1px solid var(--color-border);background:#fafbfc;padding:11px 12px;font-size:11.5px}thead th:first-child{border-top-left-radius:var(--radius-sm)}thead th:last-child{border-top-right-radius:var(--radius-sm)}tbody td{border-bottom:1px solid var(--color-border);vertical-align:middle;padding:12px}tbody tr:last-child td{border-bottom:none}tbody tr{transition:background-color .1s}tbody tr:hover{background:#fafbfc}.table-pagination{border-top:1px solid var(--color-border);color:var(--color-text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:4px;padding-top:16px;font-size:13px;display:flex}.table-pagination-btns{align-items:center;gap:10px;display:flex}.table-pagination-page{color:var(--color-text);font-weight:600}.badge{white-space:nowrap;border-radius:20px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.badge-success{background:var(--color-success-bg);color:var(--color-success)}.badge-danger{background:var(--color-danger-bg);color:var(--color-danger)}.badge-warning{background:var(--color-warning-bg);color:var(--color-warning)}.badge-neutral{background:var(--color-bg);color:var(--color-text-muted)}.alert{border-radius:var(--radius-sm);margin-bottom:16px;padding:12px 16px;font-size:14px}.alert-error{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid #f1c9c4}.alert-success{background:var(--color-success-bg);color:var(--color-success);border:1px solid #c7e7d1}.search-bar{gap:10px;margin-bottom:18px;display:flex}.search-bar select{width:auto}.search-bar input{flex:1}.toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.login-page{background:linear-gradient(160deg,#0a0c10 0%,#14161a 55%,#0065b0 140%);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card{border-radius:var(--radius);width:100%;max-width:380px;box-shadow:var(--shadow-lg);background:#fff;padding:36px 32px}.login-card img{max-width:220px;margin-bottom:24px;display:block}.login-card h2{margin:0 0 20px;font-size:18px;font-weight:700}.empty-state{text-align:center;color:var(--color-text-muted);padding:44px 20px;font-size:14px}.autocomplete{position:relative}.autocomplete-results{border:1px solid var(--color-border);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);z-index:20;background:#fff;max-height:260px;margin-top:4px;position:absolute;top:100%;left:0;right:0;overflow-y:auto}.autocomplete-item{cursor:pointer;border-bottom:1px solid var(--color-border);padding:10px 12px;font-size:14px;transition:background-color .1s}.autocomplete-item:last-child{border-bottom:none}.autocomplete-item:hover{background:var(--color-primary-light)}.autocomplete-item .ac-name{color:var(--color-text);font-weight:600}.autocomplete-item .ac-meta{color:var(--color-text-muted);font-size:12px}.autocomplete-empty{color:var(--color-text-muted);padding:10px 12px;font-size:13px}.selected-student{background:var(--color-primary-light);border-radius:var(--radius-sm);border:1px solid #cfe2f3;justify-content:space-between;align-items:center;padding:10px 12px;font-size:14px;display:flex}.selected-student button{color:var(--color-danger);cursor:pointer;background:0 0;border:none;font-size:13px}.modal-overlay{z-index:50;background:#10182873;justify-content:center;align-items:flex-start;padding:40px 16px;display:flex;position:fixed;inset:0;overflow-y:auto}.modal{border-radius:var(--radius);width:100%;box-shadow:var(--shadow-lg);background:#fff;flex-direction:column;max-height:calc(100vh - 80px);display:flex}.modal-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:18px 22px;display:flex}.modal-header h3{margin:0;font-size:18px;font-weight:700}.modal-close{color:var(--color-text-muted);cursor:pointer;background:0 0;border:none;padding:0 4px;font-size:24px;line-height:1}.modal-close:hover{color:var(--color-text)}.modal-body{padding:22px;overflow-y:auto}.modal-footer{border-top:1px solid var(--color-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:16px 22px;display:flex}.loading-state{color:var(--color-text-muted);justify-content:center;align-items:center;gap:12px;padding:48px 20px;font-size:14px;display:flex}.spinner{border:2.5px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;flex-shrink:0;width:20px;height:20px;animation:.7s linear infinite spin}.spinner-sm{border-width:2px;width:14px;height:14px}@keyframes spin{to{transform:rotate(360deg)}}.mp-grid{grid-template-columns:1fr 1fr;gap:10px 20px;display:grid}.mp-grid>div{word-break:break-word;min-width:0}.mp-lbl{color:var(--color-text-muted);margin-bottom:2px;font-size:12px;font-weight:600;display:block}@media (width<=640px){.mp-grid{grid-template-columns:1fr}}