:root{color-scheme:light;--ink:#243746;--muted:#607381;--teal:#0b7a62;--line:#d6e0e5;--paper:#fff;--bg:#eef2f4;font-family:Inter,"Segoe UI",system-ui,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
[hidden]{display:none!important}
.account-dialog{max-width:640px;width:calc(100% - 32px);max-height:85vh;overflow:auto;border:1px solid #bdcdd3;border-radius:8px;padding:28px;color:var(--ink);background:white;box-shadow:0 24px 80px #122c4444}.account-dialog::backdrop{background:#102c3b99}.account-dialog ul{padding-left:22px;font-size:14px;line-height:1.8;overflow-wrap:anywhere}.account-dialog .mini-actions{margin-top:20px}.account-dialog .recovery-code{margin:12px 0;font:32px ui-monospace,monospace;letter-spacing:.08em;text-align:center}#pendingResults input[type=checkbox]{width:20px;height:20px;min-height:20px;accent-color:var(--teal)}
*{box-sizing:border-box}body{margin:0}a{color:var(--teal)}button,input,select{font:inherit}button,.button{cursor:pointer;border:1px solid #c5d2d9;border-radius:5px;min-height:42px;padding:10px 16px;color:var(--ink);background:white;font-weight:650;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}button:hover,.button:hover{background:#eaf3f4;border-color:#85adb1}button:disabled{cursor:not-allowed;opacity:.5}button.primary,.button.primary{background:var(--teal);border-color:var(--teal);color:white}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #12a37f;outline-offset:3px}input,select{min-height:44px;border:1px solid #b8c8d1;border-radius:4px;padding:10px 12px;width:100%;background:white;color:var(--ink)}label{display:grid;gap:8px;font-size:14px;font-weight:600}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3vw,42px);line-height:1.14;letter-spacing:-.035em;margin-bottom:18px}h2{font-size:23px;letter-spacing:-.02em}h3{font-size:17px}p{line-height:1.65}small,.muted{color:var(--muted)}.school-header{height:76px;background:white;border-bottom:1px solid var(--line);padding:0 max(24px,calc((100vw - 1360px)/2));display:flex;align-items:center;justify-content:space-between;gap:18px}.wordmark{color:var(--ink);display:flex;gap:12px;align-items:center;font-weight:800;font-size:17px;letter-spacing:.035em;text-decoration:none}.wordmark small{display:block;font-size:11px;font-weight:500;letter-spacing:0;margin-top:3px}.logo-mark{background:var(--teal);color:white;width:35px;height:37px;display:grid;place-items:center;font-size:25px;border-radius:3px}.eyebrow{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);font-weight:750;margin-bottom:16px}.auth-layout{max-width:1140px;padding:64px 32px;margin:auto;display:grid;grid-template-columns:1fr 450px;gap:80px;align-items:start}.auth-intro{padding-top:26px}.auth-intro h1{max-width:500px;font-size:48px}.auth-intro .lead{max-width:440px;font-size:18px;color:var(--muted)}.journey-preview{border-top:1px solid var(--line);margin:36px 0 0;padding:24px 0;list-style:none;display:grid;gap:24px}.journey-preview li{display:flex;gap:16px;align-items:flex-start}.journey-preview .num{border:1px solid #adbec5;border-radius:50%;width:31px;height:31px;display:grid;place-items:center;flex-shrink:0;font-size:12px;font-weight:700}.journey-preview b{display:block;margin-bottom:5px}.journey-preview small{font-size:13px}.auth-card,.card{background:white;border:1px solid var(--line);border-radius:8px;padding:28px}.auth-card{box-shadow:0 8px 26px #2b4c5910}.auth-tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:24px}.auth-tabs button{flex:1;border-color:transparent}.auth-tabs .active{background:#e8f5f4;color:var(--teal)}.form-grid{display:grid;gap:17px}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-help{font-size:12px;line-height:1.5;font-weight:400;overflow-wrap:anywhere}.form-error,.notice{background:#fff5df;color:#694e10;border-left:3px solid #c59124;padding:14px 16px;font-size:14px;line-height:1.5;margin:16px 0}.notice.success{background:#e6f5ed;color:#196447;border-color:#329570}.form-error:empty{display:none}.link-button{border:0;min-height:32px;font-size:13px;background:transparent;padding:4px;color:var(--teal)}.auth-footer{margin-top:24px;border-top:1px solid var(--line);padding-top:18px;font-size:12px;line-height:1.6}.auth-footer summary{cursor:pointer}.account-meta{display:flex;gap:14px;align-items:center;font-size:13px}.account-meta b{display:block}.account-meta small{display:block;font-size:11px;margin-top:3px}.account-meta button{font-size:12px;min-height:34px;padding:6px 12px}.dashboard{max-width:1280px;margin:auto;padding:38px 30px 72px}.dashboard-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:30px}.dashboard-head h1{font-size:34px}.dashboard-head p{color:var(--muted);margin-bottom:0}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px}.progress-card{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:24px;margin-bottom:26px}.progress-card h2{font-size:19px;margin-bottom:4px}.progress-card p{margin:0;font-size:13px;color:var(--muted)}.progress-card strong{font-size:29px;color:var(--teal)}progress{display:block;width:100%;height:8px;border:0;border-radius:4px;grid-column:1/-1;overflow:hidden;background:#e2e9ed}progress::-webkit-progress-bar{background:#e2e9ed}progress::-webkit-progress-value{background:var(--teal)}.next-card{background:#e6f3f2;border-color:#a3cdca}.next-card h2{font-size:22px;margin:12px 0}.next-card p{font-size:14px}.course-group{margin-top:30px}.course-group>h2{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}.lesson-row{width:100%;display:grid;grid-template-columns:34px 1fr auto;gap:14px;align-items:center;text-align:left;border:1px solid var(--line);border-radius:0;border-bottom:0;min-height:78px;padding:17px 20px;font-weight:400}.lesson-row:first-of-type{border-radius:7px 7px 0 0}.lesson-row:last-child{border-bottom:1px solid var(--line);border-radius:0 0 7px 7px}.lesson-row b{display:block;font-size:15px;margin-bottom:5px}.lesson-row small{font-size:12px}.lesson-row:disabled{opacity:1;background:#f5f7f8;color:#7b8b95}.lesson-status{font-size:12px;font-weight:650;border:1px solid var(--line);width:29px;height:29px;display:grid;place-items:center;border-radius:50%;background:white}.done .lesson-status{color:var(--teal);background:#e8f5f1;border-color:#93c4b6}.lesson-row.current{border-left:3px solid var(--teal)}.chip{font-size:11px;border:1px solid #bed2d6;background:#edf5f5;padding:4px 8px;border-radius:4px;white-space:nowrap}.locked-text{font-size:11px}.side-stack{display:grid;gap:20px;align-content:start}.side-stack .card{padding:24px}.feature-list{padding:0;list-style:none;margin:16px 0 0;display:grid;gap:14px;font-size:13px}.feature-list li{display:flex;justify-content:space-between;gap:10px}.feature-list .unlocked{color:var(--teal)}.attempt-list{list-style:none;padding:0;display:grid;gap:15px;font-size:13px}.attempt-list li{border-bottom:1px solid var(--line);padding-bottom:12px}.attempt-list strong{float:right}.attempt-list small{display:block;margin-top:5px}.lesson-layout{max-width:1120px;margin:35px auto;padding:0 30px 60px;display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px}.lesson-outline{padding-top:20px}.lesson-outline h2{font-size:13px;line-height:1.5}.lesson-outline ol{padding:0;list-style:none;margin-top:20px;font-size:13px;line-height:1.5}.lesson-outline li{padding:12px;border-left:2px solid var(--line);color:var(--muted)}.lesson-outline li.active{border-color:var(--teal);color:var(--teal);font-weight:650;background:#e3efee}.lesson-content{padding:40px;min-height:460px}.lesson-content h1{font-size:32px}.lesson-content p{font-size:17px;line-height:1.85}.lesson-content .example{border:1px solid #bdd2d9;background:#f2f7f8;padding:24px;font:15px/1.8 ui-monospace,SFMono-Regular,monospace;white-space:pre-wrap;margin:24px 0}.lesson-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:36px;border-top:1px solid var(--line);padding-top:22px}.lesson-actions small{font-size:12px}.quiz-question{border:0;padding:0;margin:0 0 26px}.quiz-question legend{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:14px}.quiz-question label{display:flex;flex-direction:row;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:5px;margin:8px 0;font-size:14px;font-weight:400;align-items:center;cursor:pointer;line-height:1.5}.quiz-question label:has(:checked){border-color:var(--teal);background:#eaf5f4}.quiz-question input{min-height:0;width:17px;height:17px;accent-color:var(--teal);flex-shrink:0}.feedback-list{list-style:none;padding:0;display:grid;gap:12px}.feedback-list li{font-size:14px;line-height:1.6;color:#9d3a2b}.feedback-list li.ok{color:#1e6c53}.teacher-filters{display:grid;grid-template-columns:180px 130px 1fr auto;align-items:end;gap:14px;margin:25px 0}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:7px;background:white}table{border-collapse:collapse;width:100%;font-size:14px;text-align:left}th{font-size:11px;letter-spacing:.06em;color:var(--muted);background:#f7f9fa}th,td{padding:17px 18px;border-bottom:1px solid var(--line)}td small{display:block;margin-top:5px}td button{min-height:32px;font-size:12px;padding:6px 12px}td .bar-cell{min-width:130px}td progress{height:5px;margin-top:8px}.empty-state{text-align:center;padding:44px 20px;line-height:1.8;color:var(--muted)}.loading{padding:100px 24px;text-align:center;color:var(--muted)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:14px 22px;background:#203d47;color:white;border-radius:5px;font-size:14px;box-shadow:0 4px 24px #0003;max-width:90vw;z-index:100}.mini-actions{display:flex;flex-wrap:wrap;gap:10px}.footer-note{font-size:12px;line-height:1.6;color:var(--muted);margin-top:28px}
@media(max-width:1000px){.auth-layout{gap:35px;grid-template-columns:1fr 420px;padding-top:40px}.auth-intro h1{font-size:38px}.dashboard-grid{grid-template-columns:1fr 280px}.teacher-filters{grid-template-columns:1fr 1fr}.lesson-layout{grid-template-columns:175px 1fr;gap:20px}}
@media(max-width:740px){.school-header{height:auto;min-height:70px;padding:14px 18px;flex-wrap:wrap}.wordmark{font-size:15px}.account-meta{font-size:12px}.account-meta small{max-width:200px;overflow-wrap:anywhere}.auth-layout{grid-template-columns:1fr;padding:28px 18px;gap:22px;max-width:520px}.auth-intro{padding:0}.auth-intro h1{font-size:34px}.auth-intro .lead{font-size:16px}.journey-preview{display:none}.auth-card{padding:23px}.dashboard{padding:26px 18px 50px}.dashboard-head{display:block}.dashboard-head h1{font-size:29px}.dashboard-head>.mini-actions{margin-top:18px}.dashboard-grid{grid-template-columns:1fr}.side-stack{grid-template-columns:1fr}.lesson-row{padding:14px 12px;gap:10px;grid-template-columns:30px 1fr auto}.lesson-row b{font-size:14px}.lesson-row .chip{font-size:10px;padding:3px 5px}.lesson-layout{display:block;padding:0 18px 40px;margin-top:22px}.lesson-outline{padding-top:0}.lesson-outline ol{display:none}.lesson-content{padding:25px 20px;min-height:0}.lesson-content h1{font-size:27px}.lesson-content p{font-size:16px}.lesson-actions{flex-wrap:wrap}.teacher-filters{grid-template-columns:1fr 1fr}.teacher-filters label:nth-child(3){grid-column:1/-1}.two-fields{gap:10px}.lesson-content .example{padding:17px;font-size:13px}}
.attempt-summary{display:flex;flex-direction:column;gap:4px;margin-top:9px;padding:9px 11px;border-left:3px solid #879ca6;background:#f0f4f6;color:#334c59;font-size:12px;line-height:1.5;white-space:normal;overflow-wrap:anywhere}.attempt-summary strong{font-size:13px;color:#243b49}.lesson-row>span:nth-child(2){min-width:0}#result>.attempt-summary{margin:16px 0;font-size:14px}
.teacher-dashboard{max-width:1480px}.class-browser{display:grid;grid-template-columns:245px minmax(0,1fr);border:1px solid var(--line);background:white;min-height:520px}.class-list{border-right:1px solid var(--line)}.class-list h2,.student-list-head{padding:20px 22px;margin:0;border-bottom:1px solid var(--line)}.class-list h2{font-size:18px}.class-row{width:100%;display:grid;grid-template-columns:1fr auto;gap:8px;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:17px 16px;min-height:82px}.class-row span{min-width:0}.class-row b,.class-row small{display:block}.class-row small{margin-top:5px;font-weight:400}.class-row strong{color:var(--teal);font-size:14px}.class-row progress{grid-column:1/-1;height:5px}.class-row.active{background:#e7f5f4;border-left:4px solid var(--teal);padding-left:12px}.student-list{min-width:0}.student-list-head{display:flex;align-items:center;justify-content:space-between}.student-list-head h2{font-size:21px;margin:0 0 4px}.student-list-head p{font-size:13px;color:var(--muted);margin:0}.student-list .table-wrap{border:0;border-radius:0}.student-row{cursor:pointer}.student-row:hover,.student-row:focus{background:#edf8f7;outline:none}.student-row td:last-child{white-space:nowrap}.student-row td:last-child span{float:right;color:var(--teal);font-size:18px}.student-profile-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin:20px 0 24px}.student-profile-head h1{margin-bottom:7px}.student-profile-head p{color:var(--muted);margin:0}.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);background:white;border:1px solid var(--line);margin-bottom:22px}.metric-strip>div{padding:22px;border-right:1px solid var(--line)}.metric-strip>div:last-child{border-right:0}.metric-strip strong,.metric-strip span{display:block}.metric-strip strong{font-size:25px;color:var(--teal);margin-bottom:7px}.metric-strip span{font-size:12px;color:var(--muted)}.analytics-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(310px,.75fr);gap:20px;align-items:start}.analytics-main,.analytics-side{display:grid;gap:20px}.analytics-panel{background:white;border:1px solid var(--line);padding:24px;min-width:0}.analytics-panel h2{font-size:18px;margin-bottom:6px}.analytics-panel>p{font-size:13px;color:var(--muted);margin-bottom:18px}.analytics-chart{display:block;width:100%;height:auto;max-height:230px}.chart-grid{stroke:#dce5e9;stroke-width:1}.chart-line{stroke:var(--teal);stroke-width:4;stroke-linejoin:round;stroke-linecap:round}.chart-point{fill:white;stroke:var(--teal);stroke-width:3}.bar-chart{height:210px;display:flex;align-items:stretch;gap:10px;border-bottom:1px solid #bacbd2;padding:12px 8px 0}.bar-column{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;font-size:11px;color:var(--muted)}.bar-column span{height:19px}.bar-column i{display:block;width:min(36px,70%);background:var(--teal);min-height:2px;margin-top:auto}.bar-column small{height:36px;padding-top:7px;text-align:center;overflow:hidden;font-size:10px;line-height:1.2}.chart-empty{min-height:150px;display:grid;place-items:center;text-align:center;color:var(--muted);background:#f7fafb;padding:28px;font-size:13px}.student-lesson{display:grid;grid-template-columns:29px minmax(0,1fr) auto;gap:10px;align-items:center;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px}.student-lesson b,.student-lesson small{display:block}.student-lesson small{margin-top:4px;font-size:11px}.student-lesson>strong{font-size:12px}.analytics-side .attempt-list{margin-bottom:0}
.student-class-form{display:grid;grid-template-columns:minmax(0,1fr) minmax(170px,230px) auto;align-items:end;gap:18px;margin-bottom:22px}.student-class-form h2{font-size:18px;margin-bottom:5px}.student-class-form p{font-size:13px;margin:0}.student-class-form button{white-space:nowrap}
#accountFilters{grid-template-columns:150px 170px 150px minmax(180px,1fr) auto}
@media(max-width:1100px){#accountFilters{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:740px){.student-class-form{grid-template-columns:1fr}.student-class-form button{width:100%}}
@media(max-width:1000px){.class-browser{grid-template-columns:205px minmax(0,1fr)}.analytics-grid{grid-template-columns:1fr}.analytics-side{grid-template-columns:1fr 1fr}.student-list table{min-width:780px}}
@media(max-width:740px){.class-browser{display:block}.class-list{border-right:0;border-bottom:1px solid var(--line);display:flex;overflow-x:auto}.class-list h2{display:none}.class-row{min-width:170px;border-right:1px solid var(--line);border-bottom:0}.student-list table{min-width:720px}.metric-strip{grid-template-columns:1fr 1fr}.metric-strip>div:nth-child(2){border-right:0}.metric-strip>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.student-profile-head{display:block}.student-profile-head button{margin-top:14px}.analytics-side{grid-template-columns:1fr}.analytics-panel{padding:18px}.bar-chart{gap:4px}.bar-column small{font-size:9px}}