:root{font-family:Inter,"Microsoft YaHei",sans-serif;color:#26334d;background:#f5f7fb;font-size:14px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:#4e63d8;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid #dce3ef;background:white;color:#425170;border-radius:8px;padding:10px 16px}button:hover{border-color:#acb9de;background:#fafbff}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #a8b7ff;outline-offset:2px}[hidden]{display:none!important}
.admin-topbar{height:64px;background:#fff;border-bottom:1px solid #e7ebf3;display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:20}.admin-brand{font-size:23px;font-weight:750;letter-spacing:-.6px;white-space:nowrap}.admin-brand small{font-size:12px;font-weight:500;letter-spacing:0;color:#8a94a8;margin-left:12px;padding-left:12px;border-left:1px solid #e0e5ee}.admin-identity{display:flex;align-items:center;gap:18px;color:#77839b;font-size:12px}.admin-identity button{font-size:12px;padding:8px 13px}
.admin-role-switcher{position:relative;color:#53627e}.admin-role-switcher>summary{list-style:none;cursor:pointer;white-space:nowrap;border:1px solid #dce3ef;border-radius:8px;background:#fff;padding:8px 12px;line-height:1.4}.admin-role-switcher>summary::-webkit-details-marker{display:none}.admin-role-switcher>summary::after{content:'⌄';margin-left:8px;color:#8d9ab1}.admin-role-switcher[open]>summary{background:#edf1ff;border-color:#b6c3ef;color:#4e63d8}.admin-role-switcher>summary:focus-visible{outline:3px solid #a8b7ff;outline-offset:2px}.admin-role-switch-panel{position:absolute;right:0;top:calc(100% + 10px);width:240px;max-width:calc(100vw - 32px);padding:12px;border:1px solid #e0e6f1;border-radius:12px;background:#fff;box-shadow:0 12px 32px #26334d1a;z-index:25}.admin-role-switch-panel .admin-role-switch-note{font-size:11px;line-height:1.6;margin:0 4px 8px;color:#8d99ad}.admin-role-switch-panel button{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;padding:11px 12px;text-align:left}.admin-role-switch-panel button span{color:#9ba8bf}.admin-role-switch-panel [data-role-switch-status]:empty{display:none}.admin-role-switch-panel [data-role-switch-status]{font-size:11px;line-height:1.7;margin:8px 4px 0;color:#6d7c96}.admin-role-switch-panel [data-role-switch-open]{display:block;padding:10px 12px;margin-top:8px;border-radius:8px;background:#edf1ff;text-align:center;font-size:12px}
#admin-app{margin:0;padding:0;max-width:none}.admin-layout{display:grid;grid-template-columns:216px minmax(0,1fr);min-height:calc(100vh - 64px)}.admin-sidebar{position:sticky;top:64px;height:calc(100vh - 64px);background:#fff;border-right:1px solid #e7ebf3;padding:28px 16px 18px;display:flex;flex-direction:column}.admin-sidebar-label{font-size:9px;letter-spacing:1.8px;color:#a2acbf;margin:0 12px 24px}.admin-sidebar nav{display:block}.admin-nav-group{margin:0 0 25px}.admin-nav-group h2{font-size:11px;font-weight:500;color:#9aa5b8;margin:0 12px 10px}.admin-nav-item{display:flex;align-items:center;gap:12px;width:100%;border:0;border-radius:8px;background:none;color:#6c7890;text-align:left;padding:12px 13px;margin:3px 0;font-size:13px;line-height:1.4;white-space:nowrap}.admin-nav-item:hover{background:#f6f8fc;border:0;color:#4e63d8}.admin-nav-item.active{background:#edf1ff;color:#4e63d8;font-weight:600}.admin-nav-dot{width:7px;height:7px;border:1.5px solid #adb8cc;border-radius:2px;flex:none}.active .admin-nav-dot{background:#6075dd;border-color:#6075dd}.admin-external{margin-left:auto;font-size:13px;color:#a0abc0}.admin-sidebar-bottom{margin-top:auto;border-top:1px solid #edf0f6;padding-top:14px}
.admin-workspace{padding:32px 40px 48px;min-width:0;width:100%;max-width:1440px;margin:0 auto}.admin-page-heading{margin-bottom:28px}.eyebrow{font-size:11px;letter-spacing:1px;color:#93a0b6}h1{font-size:25px;line-height:1.4;margin:7px 0 8px;font-weight:650}h2{font-size:15px;line-height:1.5;margin:0 0 20px;font-weight:600}p{line-height:1.8;color:#7a879c;margin:8px 0 0}.admin-page-heading p{font-size:12px}.card{background:white;border:1px solid #e5eaf3;border-radius:12px;padding:26px;margin:0 0 20px;min-width:0}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:24px}.stat{margin:0;padding:23px 25px}.stat>span{font-size:12px;color:#8290a5}.stat strong{font-size:30px;font-weight:600;line-height:1.3;display:block;margin:12px 0 8px;color:#26334d}.stat small{font-size:11px;color:#a0aabc;display:block}.admin-overview-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px}.admin-overview-grid .card{margin:0}.admin-status-list{margin:0}.admin-status-list>div{display:flex;align-items:baseline;justify-content:space-between;gap:22px;padding:15px 0;border-bottom:1px solid #f0f2f7;font-size:12px}.admin-status-list>div:last-child{border-bottom:0}.admin-status-list dt{color:#919cb0;flex:none}.admin-status-list dd{margin:0;text-align:right;color:#52617c;overflow-wrap:anywhere}.admin-card-note{padding-top:10px}.admin-account-card{max-width:680px}.admin-account-action{border-top:1px solid #eef1f6;margin-top:10px;padding-top:22px}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:14px}.toolbar h2{margin:0}.grid{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}label{display:flex;flex-direction:column;gap:9px;font-size:12px;font-weight:600;margin:16px 0;color:#64718b}input,select,textarea{min-height:42px;border:1px solid #dfe5ef;border-radius:8px;padding:10px 12px;background:#fcfdff;color:#35445f;width:100%}textarea{min-height:90px}.primary{background:#5169dd;color:white;border-color:#5169dd}.primary:hover{background:#455dd1;color:#fff;border-color:#455dd1}.check{flex-direction:row;align-items:center;gap:9px;font-weight:400}.check input{width:17px;min-height:17px;margin:0}table{width:100%;border-collapse:collapse;text-align:left;font-size:12px}th,td{padding:16px 12px;border-bottom:1px solid #eef1f6;vertical-align:middle}th{color:#98a3b6;background:#f7f9fd;font-weight:500}td{color:#65728b;overflow-wrap:anywhere}td button{font-size:12px;margin:3px;padding:7px 12px}td small{display:block;font-size:10px;color:#9aa5b9;margin-top:5px}tbody tr:last-child td{border-bottom:0}.admin-empty{text-align:center;color:#a1abbc;padding:38px}.admin-page-content>.card{overflow-x:auto}.admin-loading{padding:50px;text-align:center;color:#9aa6ba}.error{color:#b33737;min-height:20px}.muted{font-size:11px;color:#9ca7b8}.login{max-width:450px;margin:72px auto;padding:32px}.login h1{margin-top:15px}.login p{font-size:12px}.login button{width:100%;margin:12px 0}.login h2{font-size:18px}.login .error{color:#b33737}
#message{position:fixed;z-index:100;bottom:24px;left:50%;transform:translateX(-50%);background:#2c3a56;color:white;border-radius:8px;padding:12px 22px;font-size:12px;display:none;max-width:90vw}#message.visible{display:block}dialog{border:1px solid #dce3ef;border-radius:14px;padding:28px;max-width:620px;width:90vw;color:#26334d}dialog::backdrop{background:#18263f66}.row-actions{display:flex;gap:10px;justify-content:flex-end}pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:12px}
.admin-load-error h2{margin-bottom:8px;color:#a34848}.admin-load-error button{margin-top:18px}
.admin-advanced{border:1px solid #e6eaf2;border-radius:10px;padding:14px 16px;margin:20px 0}.admin-advanced>summary{cursor:pointer;color:#53678c;font-size:12px;font-weight:600;line-height:1.6}.admin-advanced[open]>summary{padding-bottom:8px}.admin-checks{display:flex;flex-wrap:wrap;gap:4px 22px}.admin-checks .check{margin:10px 0}.admin-dialog-note{font-size:12px;margin-bottom:16px}.admin-table-actions{display:flex;flex-wrap:wrap;white-space:nowrap}.admin-table-actions button{margin:3px 6px 3px 0}dialog{max-height:90vh;overflow:auto}dialog .row-actions{position:sticky;bottom:-28px;background:#fff;padding:16px 0 4px;border-top:1px solid #eef1f6;z-index:1}[data-calibration-method]{margin:14px 0}
.admin-student-picker{border:1px solid #e6eaf2;border-radius:10px;padding:14px 16px;margin:20px 0}.admin-student-picker legend{font-size:12px;font-weight:600;color:#64718b}.admin-picker-heading{display:flex;align-items:center;gap:12px}.admin-picker-heading input{min-width:0}.admin-picker-heading small{font-size:11px;color:#7d8ba2;white-space:nowrap}.admin-student-options{max-height:230px;overflow:auto;margin:10px 0}.admin-student-options .check{padding:8px 4px;margin:0;border-bottom:1px solid #f0f2f7}.admin-student-options small{display:block;font-size:11px;font-weight:400;color:#8b97ac;margin-top:3px}
@media(max-width:1050px){.admin-workspace{padding:28px 24px}.admin-layout{grid-template-columns:184px minmax(0,1fr)}.admin-sidebar{padding:24px 12px 16px}.stats{gap:12px}.stat{padding:20px}.admin-overview-grid{gap:16px}}
@media(max-width:700px){.admin-topbar{height:60px;padding:0 16px}.admin-brand{font-size:20px}.admin-brand small{font-size:11px;margin-left:8px;padding-left:8px}.admin-identity{gap:10px}#admin-name{display:none}.admin-layout{display:block;min-height:calc(100vh - 60px)}.admin-sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid #e7ebf3;padding:10px 12px}.admin-sidebar-label,.admin-nav-group h2,.admin-nav-dot{display:none}.admin-sidebar nav{display:flex;flex-wrap:wrap;gap:4px}.admin-nav-group{display:contents}.admin-nav-item{display:inline-flex;width:auto;padding:9px 10px;font-size:12px;margin:0}.admin-sidebar-bottom{margin:6px 0 0;border-top:1px solid #f0f2f7;padding-top:8px}.admin-workspace{padding:24px 16px}.admin-page-heading{margin-bottom:22px}h1{font-size:23px}.stats{gap:8px;margin-bottom:18px}.stat{padding:16px 12px}.stat strong{font-size:25px}.stat small{line-height:1.6}.admin-overview-grid,.grid{grid-template-columns:1fr;gap:16px}.card{padding:20px}.login{margin:40px 16px;max-width:none}.toolbar{align-items:flex-start}th,td{padding:13px 9px}dialog{padding:22px}}
@media(max-width:420px){.admin-topbar{padding:0 12px}.admin-brand{font-size:18px}.admin-brand small{display:none}.admin-identity{gap:8px}.admin-role-switcher>summary{padding:8px 10px}.admin-identity button{padding:8px 10px}}