:root{--blue:#497cc4;--blue-deep:#2e568e;--blue-soft:#eaf2fd;--blue-pale:#f3f7fd;--ink:#20324e;--muted:#6a7a90;--border:#e0e8f2;--paper:#fff;--green:#277561;--green-bg:#e6f4ed;--amber:#93651e;--amber-bg:#fff3d9;--shadow:0 12px 35px #243f6810;--radius:20px;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:#f7f9fc;font-synthesis:none;line-height:1.6;font-size:15px}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:var(--blue-deep);text-decoration:none}a:hover{text-decoration:none}button,a,input,select,textarea,summary{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #83ade8}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(26px,2.5vw,36px);line-height:1.25;letter-spacing:-1px;margin-bottom:10px}h2{font-size:21px;line-height:1.4;letter-spacing:-.35px;margin-bottom:12px}h3{font-size:17px;line-height:1.45;margin-bottom:8px}p{margin-bottom:16px}small{font-size:12px}ul,ol{padding-left:23px}li{padding-left:3px;margin:7px 0}hr{border:0;border-top:1px solid var(--border);margin:24px 0}.muted{color:var(--muted)}.icon{width:21px;height:21px;flex:none;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:10px;top:-100px;z-index:100;background:white;padding:12px}.skip-link:focus{top:10px}.initial-loader{min-height:80vh;display:grid;place-items:center;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:12px;padding:11px 18px;font-weight:650;font-size:14px;line-height:1.5;border:1px solid transparent;transition:background .15s,transform .15s;white-space:normal;text-align:center}.btn:hover:not(:disabled){transform:translateY(-1px)}.primary{background:var(--blue);color:white;box-shadow:0 4px 12px #497cc41c}.primary:hover:not(:disabled){background:#396db6}.secondary{background:white;color:var(--blue-deep);border-color:#cfdeef}.secondary:hover:not(:disabled){background:var(--blue-pale)}.white{background:white;color:var(--blue-deep)}.text-btn{background:transparent;color:var(--blue-deep);padding:10px}.wide{width:100%}.button-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.text-link{font-size:13px;font-weight:650;background:none;border:0;color:var(--blue-deep);padding:0;display:inline-flex;align-items:center;gap:6px}.text-link:hover{text-decoration:underline}.icon-btn{width:36px;height:36px;border:0;background:transparent;color:var(--muted);border-radius:9px;display:inline-flex;align-items:center;justify-content:center}.icon-btn:hover{background:var(--blue-soft);color:var(--blue-deep)}.eyebrow{font-size:11px;letter-spacing:1.8px;font-weight:750;color:var(--blue-deep);margin-bottom:10px}.pill{display:inline-block;background:#dce9fb;color:var(--blue-deep);padding:7px 13px;border-radius:30px;font-size:10px;letter-spacing:1.2px;font-weight:750}.pill.light{background:#ffffff2b;color:white}.badge{display:inline-flex;align-items:center;line-height:1.5;padding:4px 9px;border-radius:7px;font-size:11px;font-weight:650;white-space:nowrap}.badge.blue{background:var(--blue-soft);color:var(--blue-deep)}.badge.green{background:var(--green-bg);color:var(--green)}.badge.amber{background:var(--amber-bg);color:var(--amber)}.badge.gray{background:#f0f3f7;color:#64748b}.notice{padding:15px 18px;border:1px solid #d6e4f6;border-radius:12px;background:var(--blue-pale);font-size:13px;line-height:1.7;margin:0 0 24px;display:block}.notice.success{background:var(--green-bg);border-color:#cbe5da;color:var(--green)}.notice>.icon{margin-right:6px}.field{display:flex;flex-direction:column;gap:7px;font-size:13px;font-weight:650;margin:18px 0}.field small{font-weight:400;color:var(--muted)}input,select,textarea{border:1px solid #d8e1ee;border-radius:10px;background:#fff;color:var(--ink);padding:11px 13px;min-width:0;width:100%}input::placeholder,textarea::placeholder{color:#96a3b5;font-size:13px}textarea{resize:vertical;line-height:1.7}input:focus,select:focus,textarea:focus{border-color:var(--blue)}.field-note{font-size:12px;color:var(--muted);line-height:1.7}.brand{display:flex;align-items:center;gap:8px;color:var(--ink)}.brand img{height:55px;width:58px;object-fit:cover;object-position:top;/* Wordmark is repeated as accessible HTML; full supplied logo retained in asset. */}.brand span{font-size:20px;letter-spacing:2px;font-weight:780;line-height:1.35}.brand small{display:block;font-size:9px;letter-spacing:1px;font-weight:500;color:var(--muted)}
/* Welcome */
.welcome{display:grid;grid-template-columns:1.1fr 1fr;min-height:100vh;background:white}.welcome-story{background:#eaf2fd;padding:34px 6vw;display:flex;flex-direction:column;position:relative;overflow:hidden}.welcome-story:before{content:"";position:absolute;width:500px;height:500px;border-radius:50%;border:70px solid #deebfc;bottom:-330px;left:-110px;pointer-events:none}.story-copy{margin:auto 0;padding:50px 0;position:relative;max-width:550px}.story-copy h1{font-size:clamp(36px,3.7vw,58px);line-height:1.18;letter-spacing:-2.5px;margin-top:22px;margin-bottom:23px}.story-copy h1 em{font-style:normal;color:var(--blue)}.story-copy>p{max-width:420px;color:#667e9c;font-size:16px;line-height:1.8}.learning-visual{background:#ffffffa8;border:1px solid #fff;border-radius:20px;padding:25px;margin:32px 0;box-shadow:0 12px 40px #7591b414}.visual-label{color:#7f93ad;font-size:9px;letter-spacing:1.8px;font-weight:750}.visual-equation{font-size:14px;font-weight:650;margin-top:12px}.visual-equation>span{color:#8baad3;padding:0 8px}.visual-path{display:flex;align-items:center;justify-content:space-between;margin:22px 0}.visual-path>div{display:flex;flex-direction:column;gap:6px;font-size:10px;color:var(--muted)}.visual-path b{background:var(--blue-soft);border:1px solid #cddff6;border-radius:50%;width:35px;height:35px;display:grid;place-items:center;color:var(--blue);font-size:12px}.visual-path>span{color:#a8bdd7}.visual-result{border-top:1px solid var(--border);padding-top:15px;color:var(--blue-deep);font-size:13px;display:flex;align-items:center;justify-content:space-between}.story-points{display:flex;gap:20px;font-size:11px;color:#637b98}.story-points span{display:flex;align-items:center;gap:6px}.story-footer{font-size:10px;color:#8396af;position:relative;margin-bottom:0}.welcome-form{display:grid;place-items:center;padding:48px}.auth-card{width:100%;max-width:370px}.auth-card h2{font-size:28px;letter-spacing:-.8px;margin-bottom:12px}.auth-card>.muted{font-size:13px;margin-bottom:28px}.auth-card form .btn{margin-top:12px}.auth-links{display:flex;justify-content:space-between;gap:10px;margin:19px 0}.auth-links .text-link{font-size:11px}.demo-options{border-top:1px solid var(--border);margin-top:30px;padding-top:24px}.demo-options>p{font-size:12px;color:var(--muted);margin-bottom:12px}.demo-options .button-row>.btn{flex:1;font-size:12px}.demo-options small{display:block;font-size:10px;line-height:1.7;color:#8899ae;margin-top:13px}.privacy-note{font-size:10px;text-align:center;color:#94a0b0;margin-top:28px;margin-bottom:0}
/* Shell */
.app-shell{display:flex;min-height:100vh}.sidebar{width:245px;background:#fff;border-right:1px solid var(--border);padding:27px 20px;position:fixed;top:0;bottom:0;display:flex;flex-direction:column;z-index:30;overflow-y:auto}.sidebar .brand{margin:0 0 35px 3px}.sidebar .brand img{width:43px;height:43px}.sidebar .brand span{font-size:16px}.sidebar .brand small{font-size:8px;letter-spacing:.5px}.role-label{font-size:9px;color:#9aa9bc;letter-spacing:1.8px;margin:0 16px 12px;font-weight:700}.nav-item{display:flex;align-items:center;gap:12px;font-size:12px;color:#74849a;padding:12px 14px;border-radius:10px;margin:5px 0;font-weight:550;width:100%;background:none;border:0;text-align:left}.nav-item .icon{width:19px;height:19px}.nav-item.active{background:var(--blue-soft);color:var(--blue-deep);font-weight:700}.nav-item:hover{background:#f2f6fc;color:var(--blue-deep)}.nav-lock{margin-left:auto;width:13px!important;height:13px!important}.sidebar-bottom{margin-top:auto;padding-top:24px}.small-card{padding:15px;border-radius:12px;background:var(--blue-pale);margin-bottom:19px;color:#6a87ac}.small-card>.icon{width:22px;margin-bottom:5px}.small-card p{font-size:11px;line-height:1.8;margin:0}.workspace{margin-left:245px;min-width:0;width:calc(100% - 245px);display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;height:83px;padding:0 38px;background:#ffffffd9;border-bottom:1px solid var(--border)}.class-switch{display:flex;flex-direction:column}.class-switch label{font-size:9px;letter-spacing:.5px;color:#8e9db0;line-height:1.3}.class-switch select{border:0;padding:4px 25px 3px 0;font-size:12px;font-weight:650;background:transparent;max-width:240px}.topbar-right{display:flex;align-items:center;gap:24px}.user-chip{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:11px;font-weight:650}.user-chip small{display:block;font-size:9px;font-weight:400;color:var(--muted)}.avatar{border-radius:50%;background:#dce9fa;color:var(--blue-deep);width:35px;height:35px;display:grid;place-items:center;font-size:15px;font-weight:650}.avatar.large{height:60px;width:60px;font-size:24px}.demo-banner{background:#fff6e6;color:#8b6f42;font-size:10px;padding:9px 38px;display:flex;align-items:center;justify-content:space-between;gap:20px}.demo-banner .text-link{font-size:10px;color:#80613c}.demo-banner .icon{height:13px;width:13px}.main-content{padding:33px 38px 45px;max-width:1440px;width:100%;margin:0 auto;flex:1}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:28px}.page-heading .eyebrow{font-size:9px;margin-bottom:8px}.page-heading h1{font-size:28px;letter-spacing:-.8px}.page-heading p.muted{font-size:12px;margin-bottom:0;max-width:700px}.app-footer{display:flex;align-items:center;justify-content:space-between;padding:18px 38px;border-top:1px solid var(--border);font-size:9px;color:#98a4b4}.panel{background:white;border:1px solid var(--border);border-radius:var(--radius);padding:25px;box-shadow:0 2px 4px #233b5a02}.panel>h2{font-size:18px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:18px}.section-heading>h2{margin:0;font-size:18px}.content-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:22px}.space-top{margin-top:24px}.space-bottom{margin-bottom:24px}.empty{text-align:center;padding:45px 20px;color:var(--muted);max-width:650px;margin:auto}.empty>.icon{width:35px;height:35px;color:#99b8e1;margin-bottom:12px}.empty h3{color:var(--ink);font-size:17px}.empty p{font-size:13px;margin:0 auto 20px;max-width:480px}.mobile-menu{display:none}
/* Overview */
.hero-panel{display:flex;justify-content:space-between;gap:30px;background:#739bd4;border-radius:22px;padding:33px 37px;color:white;overflow:hidden;margin-bottom:25px}.hero-panel h2{font-size:32px;line-height:1.2;letter-spacing:-.8px;margin:16px 0}.hero-panel h2 em{font-style:normal;color:#eef5ff}.hero-panel p{font-size:12px;line-height:1.8;max-width:370px;color:#f0f5fd;margin-bottom:21px}.hero-panel .btn{font-size:12px}.hero-art{width:280px;min-height:240px;position:relative;flex:none;align-self:center}.hero-circle{width:155px;height:155px;border:1px solid #e9f3ff8f;outline:15px solid #ffffff10;position:absolute;left:55px;top:25px;border-radius:50%;background:#ffffff22;display:flex;align-items:center;justify-content:center;gap:7px;font-size:70px;font-family:Georgia,serif;transform:rotate(-7deg)}.hero-circle>span{font-family:"Segoe UI",sans-serif;font-size:21px;letter-spacing:-1px;font-weight:650}.math-orbit{position:absolute;font-size:18px;letter-spacing:1px;left:10px;top:5px;transform:rotate(-15deg);color:#e1edff}.math-float{position:absolute;right:4px;top:65px;font-size:46px;color:#e5efff;transform:rotate(15deg)}.math-square{position:absolute;left:1px;bottom:45px;background:#ffffff20;border:1px solid #ffffff60;border-radius:10px;padding:10px;font-size:16px;transform:rotate(-8deg)}.hero-art-note{position:absolute;bottom:0;left:58px;font-size:10px;letter-spacing:.5px;background:#3b68a640;border-radius:30px;padding:6px 13px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:25px}.stat{background:#fff;border:1px solid var(--border);border-radius:16px;padding:21px 22px;position:relative;display:flex;flex-direction:column}.stat>span{font-size:11px;color:var(--muted);padding-right:32px}.stat>strong{font-size:29px;font-weight:700;line-height:1.5;margin:4px 0;color:#294b7b}.stat>small{font-size:10px;color:#99a4b3}.stat-icon{position:absolute;right:20px;top:20px;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--blue-pale);color:#83a5d4}.stat-icon>.icon{height:17px;width:17px}.round-icon{background:var(--blue-soft);color:#719bce;width:43px;height:43px;display:grid;place-items:center;border-radius:13px;margin-bottom:18px}.tip-panel{background:#edf4fd;border-color:#dce9f9;box-shadow:none}.tip-panel h2{font-size:20px;max-width:280px}.tip-panel p{font-size:12px;line-height:1.9;color:#7587a0}.mini-steps{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0}.mini-steps span{font-size:9px;background:#fff8;border-radius:7px;padding:6px 9px;color:#7c93b1}.teacher-hero{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:35px;background:#e5effc;border:1px solid #d6e5f9;border-radius:22px;margin-bottom:25px}.teacher-hero h2{font-size:32px;line-height:1.25;margin:20px 0 14px;color:#315782}.teacher-hero p{font-size:12px;color:#6b84a4;max-width:430px}.teacher-graphic{width:240px;text-align:center;flex:none}.teacher-graphic>div{background:#ffffffb0;border:1px solid white;border-radius:18px;transform:rotate(4deg);padding:18px;display:flex;align-items:center;flex-direction:column;box-shadow:var(--shadow)}.teacher-graphic strong{font-size:36px;color:var(--blue)}.teacher-graphic span{font-size:10px;color:#7c94b1}.teacher-graphic p{font-size:11px;margin:20px 0 0}
/* Class and catalog cards */
.class-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.class-card,.lesson-card,.catalog-game{border:1px solid var(--border);background:white;border-radius:18px;overflow:hidden}.class-card.selected{border-color:#9dbce6;box-shadow:0 0 0 2px #e5effc}.class-art{background:#e6effa;height:105px;padding:23px;display:flex;justify-content:space-between;align-items:center;color:#8eaed8}.class-art>.icon{height:45px;width:45px}.class-art>span{font-size:9px;letter-spacing:1.5px;font-weight:700}.card-body{padding:22px}.card-body h2{font-size:17px}.card-body p{font-size:12px;color:var(--muted);line-height:1.8}.card-body .section-heading{margin-bottom:10px}.card-body .btn{font-size:11px;padding:9px 13px}.card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:#9aa8b9;font-size:10px;margin-bottom:14px}.card-meta>span>.icon{height:12px;width:12px}.join-code{display:grid;grid-template-columns:1fr auto;gap:0 10px;border:1px dashed #cfdff3;padding:10px 13px;border-radius:10px;margin:18px 0}.join-code small{grid-column:1;font-size:9px;color:var(--muted)}.join-code strong{grid-column:1;letter-spacing:2px;font-size:16px;color:var(--blue-deep)}.join-code button{grid-column:2;grid-row:1/3;align-self:center}.filter-bar{display:flex;align-items:center;gap:15px;margin-bottom:25px}.search-field{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--border);border-radius:12px;padding:0 14px;flex:1;max-width:420px}.search-field>.icon{color:#98acc5;width:18px}.search-field>input{border:0;background:transparent;font-size:12px;padding:13px 0}.filter-select{display:flex;align-items:center;gap:9px;font-size:11px;color:var(--muted)}.filter-select select{width:auto;font-size:12px;padding:11px}.filter-bar>.muted{margin-left:auto;font-size:11px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.lesson-visual{height:139px;background:#e5effd;position:relative;padding:20px;color:#7d9ecb;overflow:hidden}.lesson-visual:after{content:"";width:130px;height:130px;border:1px solid #aac4e7;border-radius:50%;position:absolute;right:-20px;bottom:-40px;box-shadow:0 0 0 17px #b9cee926,0 0 0 37px #b9cee915}.lesson-visual>span{font-size:10px;font-weight:650;position:relative;z-index:1}.lesson-visual>strong{font-family:Georgia,serif;display:block;font-size:35px;line-height:1.5;letter-spacing:2px;font-weight:400;color:#97b5dd}.lesson-visual>small{font-size:8px;letter-spacing:1.8px}.lesson-visual.grade-8{background:#eaf1f9;color:#839dbb}.lesson-visual.grade-9{background:#e8edf9;color:#8a9dca}.lesson-card .card-body{display:flex;flex-direction:column;min-height:220px}.lesson-card .card-body>.button-row{margin-top:auto}.lesson-card .card-body>p{margin-bottom:20px}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:11px;color:#8b9cb2;margin-bottom:20px}.breadcrumb .icon{height:12px;width:12px}.breadcrumb .text-link{font-size:11px}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:24px;align-items:start}.reading-content{padding:35px 40px;font-size:14px;line-height:1.95}.reading-content h2{font-size:21px}.learning-goals{padding:23px;background:var(--blue-pale);border-radius:13px;margin-bottom:25px}.learning-goals h2{font-size:17px}.learning-goals ul{font-size:12px;margin-bottom:0}.lesson-section{padding:13px 0 22px;scroll-margin-top:25px;border-bottom:1px solid #edf1f7;margin-bottom:25px}.formula{font-family:Cambria,Georgia,serif;font-size:21px;letter-spacing:.5px;background:#f5f8fc;border:1px solid var(--border);padding:18px;text-align:center;border-radius:11px;margin:20px 0;white-space:pre-wrap}.worked-example{border-left:3px solid #8cb0df;background:#eff5fd;padding:24px;border-radius:0 12px 12px 0;margin:25px 0 0}.worked-example .eyebrow{font-size:9px}.worked-example h3{font-size:15px;line-height:1.8;margin-top:9px}.worked-example ol{font-size:13px;padding-left:20px}.example-answer{font-size:13px;color:#597aa6;border-top:1px solid #dce7f6;padding-top:15px;margin-top:15px}.summary-box{background:#f0f7f5;padding:24px;border-radius:12px;margin-bottom:28px}.summary-box>h2{font-size:18px}.summary-box ul{font-size:13px}.reading-side{position:sticky;top:20px}.reading-side .panel{padding:22px}.reading-side h3{font-size:14px}.reading-side p{font-size:11px;color:var(--muted)}.toc-item{width:100%;padding:10px 0;font-size:11px;line-height:1.7;text-align:left;background:none;border:0;color:#7187a5}.toc-item:hover{color:var(--blue)}.reading-side .btn{font-size:11px}
/* Assignments and answers */
.assignment-card{display:flex;align-items:center;gap:17px;padding:20px 0;border-bottom:1px solid #edf1f6}.assignment-card:last-child{border-bottom:0}.assignment-card:first-child{padding-top:4px}.assignment-symbol{width:45px;height:45px;flex:none;display:grid;place-items:center;background:var(--blue-pale);border-radius:12px;color:#86a8d5}.assignment-copy{flex:1;min-width:0}.assignment-copy h3{font-size:14px;margin:0 0 5px}.assignment-copy p{font-size:10px;color:#8d9cb0;margin:0}.assignment-copy .card-meta{margin-bottom:8px;gap:5px}.assignment-actions{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.assignment-actions .btn{font-size:10px;padding:8px 12px}.learning-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:25px}.flow-card{border:1px solid var(--border);border-radius:18px;padding:25px;background:white;display:flex;flex-direction:column;align-items:flex-start}.flow-card h2{font-size:19px;margin-top:20px}.flow-card p{font-size:12px;color:var(--muted);line-height:1.9}.flow-card>.btn{margin-top:auto}.flow-card>.text-btn{margin-top:7px}.flow-card>.field-note{font-size:11px}.flow-number{font-size:35px;line-height:1.3;color:#bfd2ec;font-weight:650;margin-bottom:18px;display:inline-block;letter-spacing:-1px}.flow-score{font-size:32px;color:var(--blue-deep);font-weight:650;margin-bottom:15px}.flow-score small{font-size:11px;color:#9ba8b8;font-weight:400;margin-left:5px}.attempt-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;align-items:start}.question-panel{padding:30px}.question-top{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:9px;font-weight:700;letter-spacing:1px;color:#8a9bb1}.question-top .badge{letter-spacing:0}.question-steps{display:flex;gap:9px;margin:24px 0 30px}.step-dot{width:34px;height:34px;border:1px solid var(--border);border-radius:9px;background:#f7f9fc;color:#95a6bc;font-size:12px}.step-dot.current{background:var(--blue);color:white;border-color:var(--blue)}.step-dot.answered:not(.current){background:#e8f4ee;color:var(--green);border-color:#c4e1d3}.question-prompt{font-size:21px;line-height:1.7;margin-bottom:26px;white-space:pre-wrap}.choices{padding:0;border:0;display:flex;flex-direction:column;gap:11px;margin:0 0 26px}.choice{padding:14px;border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;gap:13px;cursor:pointer;font-size:14px}.choice:hover{background:var(--blue-pale)}.choice:has(input:checked){background:#edf4fd;border-color:#91b4e2}.choice input{width:16px;flex:none;accent-color:var(--blue);margin:0}.choice-letter{width:27px;height:27px;border-radius:7px;display:grid;place-items:center;background:#f0f4fa;color:#8195b0;font-size:11px;font-weight:650}.reason-field{font-size:12px}.reason-field small{font-size:10px}.question-controls{display:flex;justify-content:space-between;gap:14px;padding-top:20px;margin-top:22px;border-top:1px solid var(--border)}.question-controls .btn{font-size:12px}.hint-panel{background:#edf4fd;border-color:#d9e7fa;box-shadow:none;padding:24px;position:sticky;top:24px}.hint-panel h2{font-size:19px}.hint-panel>p{font-size:12px;color:#748aa7;line-height:1.9}.hint-panel .field-note{font-size:10px;margin-top:17px}.hint-panel .btn{font-size:12px}.hint-bubble{background:#ffffffb3;border:1px solid #fff;border-radius:12px;padding:14px;margin:15px 0}.hint-bubble small{font-size:8px;letter-spacing:.8px;color:#8ba3c1}.hint-bubble p{font-size:12px;margin:6px 0 0;line-height:1.9;color:#526f97}.result-banner{display:flex;gap:25px;align-items:center;background:#eaf3fc;border-radius:18px;padding:26px 32px;margin-bottom:25px}.result-score{color:#5c8bc9;font-size:52px;font-weight:700;letter-spacing:-2px;line-height:1.3;min-width:135px}.result-score small{font-size:15px;letter-spacing:0;margin-left:4px;color:#9eb7d8}.result-banner h2{font-size:20px}.result-banner p{font-size:12px;color:#7c91ad;margin-bottom:10px}.result-item{padding:25px 0;border-bottom:1px solid var(--border)}.result-item:last-child{border-bottom:0}.result-item h3{font-size:16px;white-space:pre-wrap}.result-item>p{font-size:13px;color:#637b9a;line-height:1.9}.answer-pair{display:flex;gap:30px;font-size:12px;color:#6b809e}.answer-pair p{margin:8px 0 15px}.reason-quote{background:#f7f9fc;padding:15px 20px;border-radius:10px;margin-bottom:15px}.reason-quote small{font-size:8px;letter-spacing:1px;color:#8e9eb3}.reason-quote p{font-size:13px;white-space:pre-wrap;margin:5px 0 0}.review-note{background:#f5f9fd;border:1px solid #e4edf8;border-radius:12px;padding:20px;margin:17px 0}.review-note p{font-size:13px;line-height:1.9;white-space:pre-wrap}.review-note .card-meta{margin-bottom:0}.review-form{margin-top:28px;border-top:1px solid var(--border);padding-top:24px}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.form-grid .field{font-size:11px}.form-grid select{font-size:11px}.table-scroll{overflow:auto;width:100%}table{border-collapse:collapse;width:100%;text-align:left;font-size:11px;min-width:600px}th{font-weight:650;font-size:10px;color:#9aa8b9;border-bottom:1px solid var(--border);padding:12px;white-space:nowrap}td{padding:17px 12px;border-bottom:1px solid #edf1f7;color:#647b99}tr:last-child>td{border-bottom:0}td:first-child{color:var(--ink);font-weight:550}td .text-link{font-size:11px}.score-bar{display:flex;align-items:center;gap:12px;min-width:100px}.score-bar svg{width:70px;height:8px}.score-bar>strong{min-width:23px}.bar-track{fill:#edf2f8}.bar-practice{fill:#9ab9df}.bar-independent{fill:#658fca}.bar-delayed{fill:#71af9b}
/* Games, settings and dialogs */
.game-catalog{display:grid;grid-template-columns:repeat(2,1fr);gap:23px}.game-art{background:#e2edfc;height:150px;padding:28px;display:flex;align-items:center;justify-content:space-between;position:relative;overflow:hidden}.game-art:before{content:"";position:absolute;right:50px;top:-30px;height:200px;width:200px;border:1px solid #b9d0ee;border-radius:50%;box-shadow:0 0 0 25px #c0d5f033}.game-art>span{font-size:44px;color:#88a9d7;font-family:Georgia,serif;position:relative;z-index:1;letter-spacing:5px}.game-art>.icon{width:33px;height:33px;color:#9db8dc;position:relative;z-index:1}.game-art.sudoku{background:#e8eff9}.game-art.target{background:#e8edf9}.game-art.patterns{background:#e7f0f6}.catalog-game.locked .game-art{filter:saturate(.5)}.catalog-game .eyebrow{font-size:9px}.catalog-game h2{font-size:22px;margin-top:10px}.catalog-game .card-body>p{min-height:42px}.profile-banner{display:flex;align-items:center;gap:15px;margin:25px 0}.profile-banner strong{font-size:16px}.profile-banner p{font-size:12px;color:var(--muted);margin:0}.content-grid>.panel>p{font-size:13px;line-height:1.9;color:var(--muted)}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:23px}.help-grid .flow-number{font-size:30px}.help-grid h2{font-size:20px}.help-grid p{font-size:13px;color:var(--muted);line-height:1.9;margin-bottom:0}details{border-bottom:1px solid var(--border);padding:17px 0}details:last-child{border-bottom:0}summary{cursor:pointer;font-size:13px;font-weight:650;color:#56769f}details p{font-size:13px;line-height:1.9;margin:14px 0 0;color:var(--muted)}.modal-open{overflow:hidden}.modal-backdrop{position:fixed;inset:0;background:#172d4a66;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:25px;z-index:80}.modal{background:white;border-radius:20px;box-shadow:0 24px 100px #182e4d33;width:100%;max-width:510px;max-height:90vh;overflow:auto;padding:28px}.modal-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:14px}.modal-head h2{margin:0;font-size:22px}.modal p{font-size:13px;color:var(--muted);line-height:1.8}.copy-input{text-align:center;letter-spacing:3px;font-size:22px;font-weight:700}.toast{padding:13px 20px;background:#2f587c;color:white;border-radius:12px;box-shadow:0 6px 30px #14304d25;max-width:450px;font-size:12px;line-height:1.7;margin-top:10px}.toast.error{background:#955255}#toast-root{position:fixed;bottom:25px;right:25px;z-index:100;pointer-events:none;max-width:calc(100vw - 40px)}.is-busy{cursor:progress}.is-busy .btn.primary{opacity:.65;cursor:progress}.reset-page{min-height:100vh;display:grid;place-items:center;padding:25px}.reset-page>.panel{width:100%;max-width:450px;padding:35px}.reset-page .brand{margin-bottom:35px}.reset-page h1{font-size:25px}.reset-page p{font-size:13px;color:var(--muted)}
@media(min-width:1500px){.main-content{padding-top:40px}.sidebar{width:265px;padding:30px 25px}.workspace{margin-left:265px;width:calc(100% - 265px)}}
@media(max-width:1200px){.sidebar{width:215px;padding:25px 14px}.workspace{margin-left:215px;width:calc(100% - 215px)}.main-content{padding:28px 25px}.topbar{padding:0 25px}.demo-banner{padding:8px 25px}.hero-panel{padding:28px}.hero-art{width:225px;transform:scale(.9)}.hero-circle{left:40px}.content-grid{grid-template-columns:1fr 1fr}.lesson-grid,.class-grid{grid-template-columns:repeat(2,1fr)}.reading-layout{grid-template-columns:minmax(0,1fr) 210px}.reading-content{padding:28px}.attempt-layout{grid-template-columns:minmax(0,1fr) 240px}.hint-panel{padding:20px}.learning-flow{gap:14px}.flow-card{padding:20px}.assignment-card{gap:10px}.assignment-symbol{display:none}.teacher-graphic{width:210px}.form-grid{grid-template-columns:1fr;gap:0}.form-grid>.field{margin:9px 0}}
@media(max-width:950px){.welcome{grid-template-columns:1fr 1fr}.welcome-story{padding:30px}.welcome-form{padding:30px}.story-copy h1{font-size:38px}.story-copy{padding:35px 0}.story-copy>p{font-size:14px}.learning-visual{padding:20px}.visual-path{gap:10px}.visual-path>div{font-size:8px}.story-points{gap:10px;font-size:9px;flex-direction:column}.auth-card h2{font-size:25px}.sidebar{width:195px;padding:22px 12px}.sidebar .brand span{font-size:13px}.sidebar .brand img{width:35px;height:36px}.nav-item{font-size:11px;gap:9px;padding:11px}.workspace{margin-left:195px;width:calc(100% - 195px)}.main-content{padding:25px 22px}.page-heading{align-items:flex-start}.page-heading h1{font-size:25px}.page-heading>.btn{font-size:11px;min-width:100px}.hero-art{display:none}.hero-panel h2{font-size:32px}.hero-panel p{max-width:450px}.hero-panel{min-height:250px}.stats-grid{gap:10px}.stat{padding:17px}.stat>span{font-size:10px}.stat-icon{right:15px;top:15px;width:27px;height:27px}.stat>strong{font-size:27px}.stat>small{font-size:9px}.content-grid{grid-template-columns:1fr}.learning-flow{grid-template-columns:1fr}.flow-card{display:grid;grid-template-columns:50px 1fr auto;gap:8px 14px;align-items:center}.flow-card>.flow-number{grid-column:1;grid-row:1/4;margin:0;font-size:32px}.flow-card>.badge{grid-column:2;justify-self:start}.flow-card>h2{grid-column:2;margin:0;font-size:17px}.flow-card>p{grid-column:2;margin:0}.flow-card>.btn{grid-column:3;grid-row:2;font-size:11px}.flow-card>.flow-score{grid-column:3;grid-row:1;margin:0;font-size:24px}.flow-card>.text-btn{grid-row:3}.reading-layout{grid-template-columns:1fr}.reading-side{position:static;grid-row:1}.reading-side .panel{padding:15px 20px}.reading-side h3,.reading-side hr,.reading-side p,.reading-side .btn{display:none}.reading-side .toc-item{display:inline-block;width:auto;margin-right:15px}.reading-side .toc-item{font-size:10px}.attempt-layout{grid-template-columns:1fr}.hint-panel{position:static}.hint-panel .round-icon{float:left;margin-right:13px}.hint-panel h2{padding-top:7px}.question-panel{padding:25px}.topbar-right{gap:13px}.topbar-right>.badge{display:none}.teacher-graphic{width:180px}.teacher-hero{padding:25px}.teacher-hero h2{font-size:27px}.game-art>span{font-size:34px}}
@media(max-width:700px){.welcome{grid-template-columns:1fr}.welcome-story{padding:22px}.welcome-story .brand img{height:42px;width:44px}.welcome-story .brand span{font-size:17px}.story-copy{padding:35px 0 0;max-width:none}.story-copy h1{font-size:38px;margin-top:18px}.story-copy>p{max-width:none;font-size:13px}.learning-visual,.story-points,.story-footer{display:none}.welcome-form{padding:33px 25px 40px}.auth-card{max-width:420px}.auth-card h2{font-size:25px}.sidebar{transform:translateX(-100%);width:245px;transition:transform .2s;box-shadow:15px 0 60px #16345920}.sidebar.open{transform:translateX(0)}.sidebar .brand span{font-size:17px}.sidebar .brand img{width:45px;height:46px}.nav-item{font-size:12px;padding:13px}.workspace{margin-left:0;width:100%}.topbar{height:72px;padding:0 18px;gap:10px}.mobile-menu{display:inline-flex}.class-switch{margin-right:auto}.class-switch select{font-size:11px;max-width:155px}.topbar-right{gap:10px}.user-chip>span:not(.avatar){display:none}.user-chip .avatar{width:32px;height:32px;font-size:13px}.demo-banner{padding:9px 20px;font-size:8px}.demo-banner>.text-link{font-size:9px}.main-content{padding:25px 20px 35px}.page-heading{margin-bottom:22px;gap:15px}.page-heading h1{font-size:25px}.page-heading .muted{font-size:11px;line-height:1.8}.page-heading>.btn{font-size:10px;padding:10px 12px;min-width:85px}.hero-panel{padding:25px;border-radius:18px;min-height:0}.hero-panel h2{font-size:30px}.hero-panel p{font-size:11px}.hero-panel .pill{font-size:8px}.hero-panel .btn{font-size:11px}.stats-grid{gap:8px}.stat{padding:14px 12px;min-height:130px}.stat-icon{display:none}.stat>span{padding:0;font-size:9px;line-height:1.6}.stat>strong{font-size:26px;margin:8px 0 4px}.stat>small{font-size:8px}.panel{padding:21px;border-radius:16px}.section-heading>h2{font-size:16px}.section-heading>.text-link{font-size:10px}.assignment-card{gap:10px;flex-wrap:wrap;padding:19px 0}.assignment-copy h3{font-size:13px}.assignment-actions{width:100%;margin-top:3px}.assignment-actions .btn{font-size:10px}.assignment-copy .badge{font-size:9px}.tip-panel h2{font-size:21px}.app-footer{font-size:8px;padding:16px 20px}.app-footer>span:last-child{display:none}.teacher-hero h2{font-size:29px}.teacher-graphic{display:none}.teacher-hero .pill{font-size:8px}.teacher-hero .btn{font-size:11px}.teacher-hero p{font-size:11px}.class-grid{grid-template-columns:1fr}.class-art{height:90px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-visual{padding:15px;height:112px}.lesson-visual>span{font-size:8px;line-height:1.4;display:block;max-width:90%}.lesson-visual>strong{font-size:28px}.lesson-visual>small{font-size:7px}.lesson-card .card-body{padding:16px;min-height:245px}.lesson-card .card-body h2{font-size:14px;line-height:1.6}.lesson-card .card-body>p{font-size:10px}.lesson-card .card-meta{gap:7px;font-size:8px}.lesson-card .card-meta .badge{font-size:8px}.lesson-card .card-body .button-row{gap:5px}.lesson-card .card-body .btn{font-size:9px;padding:8px}.filter-bar{flex-wrap:wrap;gap:10px}.search-field{max-width:none;flex-basis:100%}.filter-bar>.muted{font-size:10px}.filter-select{font-size:10px}.filter-select select{font-size:11px;padding:8px}.reading-content{padding:22px;font-size:13px}.reading-content h2{font-size:19px}.reading-content .learning-goals{padding:18px}.learning-goals h2{font-size:16px}.learning-goals ul{font-size:11px}.worked-example{padding:18px}.worked-example h3{font-size:13px}.worked-example ol{font-size:12px}.formula{font-size:18px;overflow-wrap:anywhere}.reading-side{display:none}.flow-card{grid-template-columns:30px 1fr;gap:10px 13px;padding:20px}.flow-card>.flow-number{font-size:24px;grid-row:1/3;align-self:start}.flow-card>.badge{grid-column:2}.flow-card>h2{grid-column:2}.flow-card>p{grid-column:2;font-size:11px}.flow-card>.btn{grid-column:2;grid-row:auto;justify-self:start}.flow-card>.flow-score{grid-column:2;grid-row:auto}.flow-card>.text-btn{grid-row:auto}.question-panel{padding:20px}.question-prompt{font-size:18px;line-height:1.8}.question-top{font-size:8px;letter-spacing:.5px}.question-top .badge{font-size:9px}.choices{gap:9px}.choice{padding:11px;gap:10px;font-size:13px}.question-controls .btn{font-size:10px;padding:10px 13px}.reason-field{font-size:11px}.reason-field small{font-size:9px}.result-banner{padding:22px;gap:15px;align-items:flex-start}.result-score{font-size:39px;min-width:83px}.result-score small{font-size:11px}.result-banner h2{font-size:17px}.result-banner p{font-size:10px}.result-banner .text-link{font-size:10px}.answer-pair{gap:10px;flex-direction:column;margin:10px 0}.answer-pair p{margin:0}.result-item h3{font-size:14px}.result-item>p{font-size:12px}.reason-quote p{font-size:12px}.game-catalog{grid-template-columns:1fr;gap:20px}.game-art{height:130px}.catalog-game .card-body>p{min-height:0}.help-grid{grid-template-columns:1fr;gap:15px}.help-grid .flow-number{font-size:27px;margin-bottom:12px}.help-grid h2{font-size:18px}.help-grid p{font-size:12px}.modal-backdrop{padding:16px}.modal{padding:23px;max-height:93vh}.modal-head h2{font-size:20px}.toast{font-size:11px}#toast-root{bottom:15px;right:20px}.breadcrumb{font-size:9px}.breadcrumb>.text-link{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.brand .brand-mark{width:46px;height:46px;position:relative;display:block;overflow:hidden;flex:none}.brand .brand-mark img,.sidebar .brand .brand-mark img,.welcome-story .brand .brand-mark img{position:absolute;width:86px;height:86px;max-width:none;left:-19px;top:-14px;object-fit:contain}

/* Password controls do not submit forms and remain usable with a keyboard. */
.password-input{position:relative;display:block;width:100%}
.password-input input{width:100%;padding-right:124px}
.password-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);min-height:38px;display:inline-flex;align-items:center;justify-content:center;gap:5px;padding:0 8px;border:0;border-radius:8px;background:transparent;color:#456b9c;font-family:inherit;font-size:11px;font-weight:600;cursor:pointer}
.password-toggle:hover{background:#edf3fb}
.password-toggle .icon{width:17px;height:17px}
.password-toggle:focus-visible{outline:2px solid #5a86c5;outline-offset:1px}
.password-match{margin:5px 0 0;min-height:17px;font-size:11px;font-weight:400;line-height:1.5}
.password-match[data-state="match"]{color:#2d7054}
.password-match[data-state="mismatch"]{color:#a13f48}
@media(max-width:380px){.password-toggle{font-size:10px;padding:0 5px;gap:3px}.password-input input{padding-right:112px}}