:root{color-scheme:light;font-family:Inter,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;background:#f5f7fa;color:#18243b}
*{box-sizing:border-box}body{margin:0}a{color:#204c92;text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit}button{cursor:pointer}input,select,textarea{width:100%;min-height:42px;padding:9px 11px;border:1px solid #cbd5e3;border-radius:6px;background:#fff;color:#18243b}input:focus,select:focus,textarea:focus{outline:2px solid #89a7d6;outline-offset:1px}textarea{resize:vertical}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,3vw,2.35rem);letter-spacing:-.035em;line-height:1.16;margin-bottom:9px}h2{font-size:1.08rem;margin-bottom:0}h3{font-size:1rem}.app-shell{display:flex;min-height:100vh}.sidebar{width:248px;flex:none;background:#101c3a;color:#fff;display:flex;flex-direction:column;padding:22px 14px}.brand{display:flex;align-items:center;gap:11px;color:#fff;padding:2px 8px 29px}.brand:hover{text-decoration:none}.brand-mark{width:39px;height:39px;display:grid;place-items:center;flex:none;background:#fff;border-radius:7px;color:#122653;font-size:.86rem;font-weight:800}.brand strong{display:block;font-size:.96rem;white-space:nowrap}.brand small{display:block;margin-top:2px;color:#9db1d0;font-size:.74rem}.nav{display:grid;gap:4px}.nav a{display:block;color:#d5dfef;padding:11px 12px;border-radius:5px;font-size:.9rem}.nav a:hover,.nav a:focus-visible{background:#263b65;color:#fff;text-decoration:none}.sidebar-bottom{margin-top:auto;padding:17px 10px 5px;border-top:1px solid #354261}.sidebar-bottom a,.sidebar-bottom button{display:block;margin-top:10px;color:#cbd8ed;font-size:.88rem}.account-name{font-size:.88rem;font-weight:700;margin-bottom:2px}.account-email{font-size:.75rem;color:#a0b2d1;overflow-wrap:anywhere;margin-bottom:16px}.text-button{border:0;background:none;padding:0;text-align:left}.content-wrap{display:flex;flex-direction:column;flex:1;min-width:0}.topbar{height:68px;display:flex;align-items:center;gap:20px;padding:0 clamp(16px,3vw,38px);background:#fff;border-bottom:1px solid #dfe4ec}.topbar-brand{font-weight:750;color:#152b57}.topbar-label{margin-left:auto;font-size:.8rem;color:#77849a}.content{width:min(100%,1480px);margin:0 auto;padding:32px clamp(16px,3vw,40px) 60px;flex:1}.content-auth{display:grid;place-items:center}.footer{padding:16px 30px;border-top:1px solid #dfe4ec;color:#69768c;font-size:.78rem;text-align:center}.eyebrow{text-transform:uppercase;letter-spacing:.11em;color:#566f9c;font-weight:700;font-size:.78rem;margin-bottom:7px}.page-heading{margin-bottom:25px}.muted{color:#6d798e;line-height:1.5}.page-heading .muted{margin-bottom:0}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.78fr);gap:24px;align-items:start}.stack{display:grid;gap:24px}.panel{background:#fff;border:1px solid #dfe4ec;min-width:0}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 22px;border-bottom:1px solid #e3e8ef}.panel-heading p{font-size:.82rem;color:#7b879a;margin:4px 0 0}.panel-heading a{font-size:.85rem;font-weight:700;white-space:nowrap}.panel-body{padding:22px}.panel-compact{padding:22px}.stat{font-size:2.2rem;font-weight:750;color:#1c4889;margin:10px 0 2px}.lesson-row,.grade-row,.task-row,.assignment{padding:16px 22px;border-bottom:1px solid #e8ecf1}.lesson-row:last-child,.grade-row:last-child,.task-row:last-child,.assignment:last-child{border-bottom:0}.lesson-row{display:grid;grid-template-columns:77px minmax(0,1fr);gap:16px;align-items:center}.lesson-row p,.grade-row p,.task-row p{font-size:.84rem;color:#758198;margin:4px 0 0}.lesson-row strong,.grade-row strong,.task-row strong{font-size:.94rem}.time{font-weight:750;color:#23324e}.time small{display:block;color:#8a96a8;font-size:.76rem;font-weight:500;margin-top:3px}.grade-row{display:flex;gap:20px;align-items:center}.grade-number{font-size:1.3rem!important;color:#22539b}.task-row strong{display:block}.empty{color:#7a8799;padding:28px 22px;line-height:1.55;margin:0}.assignment h2{margin:0}.assignment .description{margin:18px 0 0;line-height:1.6}.split{display:flex;justify-content:space-between;gap:20px;align-items:center}.due{font-size:.82rem;color:#31568d;white-space:nowrap}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:630px}th,td{padding:13px 16px;text-align:left;border-bottom:1px solid #e7ebf1;vertical-align:middle}th{font-size:.75rem;letter-spacing:.04em;text-transform:uppercase;color:#758198;background:#f8f9fb}td{font-size:.88rem}tr:last-child td{border-bottom:0}.table-meta{display:block;color:#8794a7;margin-top:3px}.lesson-link{color:inherit;grid-template-columns:77px minmax(0,1fr) auto}.lesson-link:hover{background:#f8faff;text-decoration:none}.arrow{font-size:.8rem;color:#275393;font-weight:700}.panel-actions{padding:16px 22px;border-top:1px solid #e7ebf1;text-align:right}.border-top{border-top:1px solid #e7ebf1}.auth-card{width:min(100%,440px);padding:34px;background:#fff;border:1px solid #dce3ee;box-shadow:0 16px 50px #1d31510c}.auth-card h1{font-size:1.9rem}.auth-card .muted{font-size:.9rem}.form-stack{display:grid;gap:15px;margin-top:23px}.form-stack label{display:grid;gap:6px;font-size:.87rem;font-weight:700}.form-stack label input,.form-stack label select,.form-stack label textarea{font-weight:400}.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 18px;border-radius:5px;font-weight:700;font-size:.9rem;border:1px solid transparent;text-decoration:none}.button:hover{text-decoration:none}.button-primary{background:#17366f;color:#fff}.button-primary:hover{background:#102a5c;color:#fff}.button-primary:disabled{opacity:.48;cursor:not-allowed}.button-secondary{border-color:#cbd5e3;color:#204c92;background:#fff}.subtle-link{display:inline-block;margin-top:22px;font-size:.84rem}.hint{font-size:.78rem;color:#7b879a;margin:0}.field-error,.form-error{color:#a52d38;font-size:.8rem}.form-error{background:#fff3f3;padding:10px}.messages{margin-bottom:20px}.message{padding:12px 15px;border-left:3px solid #27599c;background:#edf3fd;margin-bottom:8px;font-size:.88rem}.message-error{border-color:#bb3444;background:#fff1f2}.message-success{border-color:#278262;background:#ecf8f2}ul.errorlist{color:#a52d38;font-size:.8rem;padding-left:18px;margin:0}
@media(max-width:900px){.dashboard-grid{grid-template-columns:1fr}.sidebar{width:210px}}
@media(max-width:640px){.app-shell{display:block}.sidebar{width:100%;padding:12px 16px}.brand{padding:0 0 11px}.brand small,.sidebar-bottom{display:none}.nav{display:flex;overflow-x:auto;gap:2px;scrollbar-width:none}.nav a{white-space:nowrap;padding:9px 11px}.topbar{height:54px}.topbar-label{display:none}.content{padding:24px 16px 40px}.panel-heading,.lesson-row,.grade-row,.task-row,.assignment{padding-left:16px;padding-right:16px}.auth-card{padding:24px}.split{display:block}.due{display:block;margin-top:8px}}
.auth-card-wide{width:min(100%,540px)}
.auth-register-link{font-size:.84rem;color:#6d798e;margin:13px 0 0}
.registration-row{display:grid;gap:12px;padding:18px 22px;border-bottom:1px solid #e8ecf1}
.registration-row:last-child{border-bottom:0}
.registration-row p{font-size:.84rem;color:#758198;margin:4px 0}
.registration-row small{font-size:.77rem;color:#8794a7}
.review-form{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:12px}
.review-form label{display:grid;gap:6px;font-size:.8rem;font-weight:700}
.registration-row .danger-button{color:#9f3d48;margin:0}
.panel-note{padding:0 22px 20px}
@media(prefers-reduced-motion:no-preference){
  .button,.nav a,.lesson-link,.subtle-link{transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}
  .button:not(:disabled):hover{transform:translateY(-1px);box-shadow:0 5px 14px #17366f22}
  .button:not(:disabled):active{transform:translateY(0);box-shadow:none}
  @keyframes portal-appear{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
}
@media(max-width:640px){.registration-row{padding:16px}.review-form{grid-template-columns:1fr}.panel-note{padding:0 16px 16px}}
.preview-banner{padding:10px 20px;text-align:center;background:#eaf0fa;border-bottom:1px solid #ccdaee;color:#244a82;font-size:.82rem;font-weight:700}
.cookie-notice{position:fixed;z-index:90;bottom:16px;left:16px;right:16px;max-width:920px;margin:auto;padding:16px 19px;display:flex;align-items:center;gap:20px;background:#fff;border:1px solid #cbd5e3;box-shadow:0 16px 42px #14294b26;color:#23324e}
.cookie-notice p{font-size:.84rem;line-height:1.5;margin:0;flex:1}
.cookie-notice form{flex:none}
.project-notice-backdrop{position:fixed;z-index:100;inset:0;display:grid;place-items:center;overflow-y:auto;padding:20px;background:#0d1a31db}
.project-notice{width:min(100%,580px);padding:clamp(24px,4vw,38px);background:#fff;border:1px solid #dae2ed;box-shadow:0 24px 80px #0005;color:#18243b}
.project-notice h2{font-size:clamp(1.45rem,3vw,1.9rem);line-height:1.2;margin:0 0 14px}
.project-notice p:not(.eyebrow){font-size:.95rem;line-height:1.6;color:#52617a;margin-bottom:24px}
.project-notice form .button{width:100%}
@media(max-width:640px){.cookie-notice{display:block;bottom:0;left:0;right:0;padding:15px 16px}.cookie-notice form{margin-top:12px}.cookie-notice button{width:100%}.project-notice-backdrop{padding:12px}.project-notice{padding:24px}}
@media(prefers-reduced-motion:no-preference){.project-notice{animation:portal-appear .22s ease-out both}}
.brand-mark{display:block;object-fit:contain;background:#fff;padding:2px;border-radius:7px}
.topbar-brand{display:inline-flex;align-items:center}
.topbar-brand img{display:block;width:160px;height:40px;object-fit:contain;object-position:left center}
.account-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.account-details{margin:0 0 24px}
.account-details div{padding:12px 0;border-bottom:1px solid #e7ebf1}
.account-details div:first-child{padding-top:0}
.account-details dt{font-size:.78rem;color:#718099;margin-bottom:4px}
.account-details dd{margin:0;font-weight:700;overflow-wrap:anywhere}
.session-list{list-style:none;margin:0 0 24px;padding:0}
.session-list li{display:grid;gap:4px;padding:12px 0;border-bottom:1px solid #e7ebf1}
.session-list li:first-child{padding-top:0}
.session-list small{color:#718099}
@media(max-width:800px){.account-grid{grid-template-columns:1fr}}
@media(max-width:640px){.topbar-brand img{width:140px;height:35px}}