:root{color:#092040;font-synthesis:none;--teal:#167f8d;--border:#d7dfe9;--muted:#586780;--geo:#198c99;--history:#d1a447;--civics:#7155a5;--econ:#e27860;background:#fff;font-family:Arial,Helvetica,sans-serif;line-height:1.45}*{box-sizing:border-box}body{margin:0}a{color:#173f75;text-underline-offset:3px}button,input,select,textarea{font:inherit}button,.button{cursor:pointer;border:1px solid var(--border);color:#092040;background:#fff;border-radius:9px;min-height:44px;padding:10px 18px;font-size:15px}button:hover,.button:hover{background:#f2f9fa;border-color:#128b99}button:disabled{cursor:default;opacity:.55}button[aria-pressed=true]{color:#fff;background:#092040;border-color:#092040}.button{background:var(--teal);color:#fff;border-color:var(--teal);justify-content:center;align-items:center;gap:18px;padding:14px 25px;font-size:18px;font-weight:700;text-decoration:none;display:inline-flex}.button:hover{color:#fff;background:#116c79}.button.secondary{color:#163e76;background:#fff;border-color:#8eaad1;padding:9px 20px;font-size:15px;font-weight:600}.button.secondary:hover{background:#edf7fa}input,select,textarea{color:#092040;background:#fff;border:1px solid #b7c4d6;border-radius:7px;width:100%;min-height:44px;padding:10px 12px}textarea{min-height:85px}input[type=checkbox]{width:auto;min-height:auto}label{margin:14px 0;font-size:15px;font-weight:600;display:block}label input,label select,label textarea{margin-top:6px;display:block}label:has(input[type=checkbox]) input{display:inline}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-2px;margin-bottom:12px;font-size:clamp(36px,4.5vw,64px);font-weight:800;line-height:1.08}h2{letter-spacing:-1px;font-size:32px;line-height:1.2}h3{margin-bottom:4px;font-size:19px;line-height:1.3}p{margin-bottom:18px}header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:20px;height:60px;padding:0 max(5.2vw,20px);display:flex}.brand{color:#092040;letter-spacing:-.6px;font-size:25px;font-weight:800;text-decoration:none}nav{align-items:center;gap:30px;height:100%;font-size:15px;display:flex}nav>a:not(.button){color:#092040;align-items:center;height:100%;text-decoration:none;display:flex;position:relative}.active:after{content:"";background:#1c62bf;height:3px;position:absolute;bottom:0;left:0;right:0}main{max-width:1440px;min-height:calc(100vh - 125px);margin:0 auto;padding:28px 5.2vw 38px}.lead{color:#334b69;margin-bottom:24px;font-size:clamp(18px,1.75vw,25px);line-height:1.35}.explore{grid-template-columns:1.88fr 1fr;align-items:center;gap:34px;margin-bottom:20px;display:grid}.map-wrap{background:#edf8fb;border-radius:13px;overflow:hidden}.map-scroll{max-height:620px;overflow:auto}.map-wrap svg{min-height:190px;display:block}.map-placeholder{background:#edf8fb;border-radius:13px;place-content:center;height:360px;display:grid}.explore-copy .rule{background:var(--teal);border-radius:2px;width:64px;height:5px;margin-bottom:18px}.explore-copy h2{letter-spacing:-1.4px;margin-bottom:16px;font-size:clamp(26px,2.7vw,40px)}.explore-copy p{color:var(--muted);margin-bottom:18px;font-size:clamp(16px,1.4vw,20px);line-height:1.45}.library-tools{justify-content:space-between;align-items:center;gap:20px;margin:8px 0 12px;display:flex}.filters{flex-wrap:wrap;gap:12px;display:flex}.filters button{white-space:nowrap;align-items:center;gap:10px;display:inline-flex}.dot{background:var(--geo);border-radius:50%;flex:none;width:12px;height:12px;display:inline-block}.geography{--lane:var(--geo)}.history{--lane:var(--history)}.civics{--lane:var(--civics)}.economics{--lane:var(--econ)}.dot{background:var(--lane,var(--geo))}.search{width:200px;margin:0}.search input{font-weight:400}.table-label,.deck-row{grid-template-columns:minmax(0,1fr) 160px 105px 140px;align-items:center;gap:22px;display:grid}.table-label{letter-spacing:1.5px;text-transform:uppercase;border-top:1px solid var(--border);border-bottom:1px solid var(--border);color:#4c6080;padding:9px 4px;font-size:11px}.deck-row{border-bottom:1px solid var(--border);padding:15px 3px;font-size:15px}.deck-name{align-items:center;gap:26px;display:flex}.deck-icon{background:var(--lane);color:#fff;border-radius:50%;flex:none;place-items:center;width:54px;height:54px;display:grid}.deck-name p{color:var(--muted);margin:4px 0 0;font-size:14px;line-height:1.3}.subject{align-items:center;gap:14px;display:flex}.deck-row .button{width:100%}footer{max-width:1440px;color:var(--muted);justify-content:space-between;gap:20px;padding:12px 5.2vw 20px;font-size:13px;display:flex}footer a{color:var(--muted)}.notice{border-left:4px solid var(--teal);color:#274d65;background:#edf7fa;margin-bottom:24px;padding:13px 18px;font-size:15px}.notice.error{color:#8c3627;background:#fff2ee;border-color:#a94532}.notice button{margin-left:15px}.empty{max-width:640px;padding:35px 0}.inline{flex-wrap:wrap;align-items:flex-end;gap:12px;display:flex}.inline>label{flex:1;min-width:160px}.inline>button{margin-bottom:14px}.muted{color:var(--muted);font-size:14px}.auth-page{max-width:470px;margin:45px auto}.auth-page h1{font-size:44px}.auth-page .filters{margin:25px 0}.auth-page>form{margin:22px 0}.auth-page details{margin:20px 0}.play{max-width:1000px;margin:10px auto}.play h1{letter-spacing:-1px;margin-top:22px;font-size:36px}.play>p{color:var(--muted)}fieldset{border:1px solid var(--border);border-radius:8px;margin:24px 0;padding:20px}legend{padding:0 8px;font-weight:700}.mode-grid{flex-wrap:wrap;gap:10px;display:flex}.run-status{justify-content:space-between;align-items:center;gap:15px;margin-top:30px;padding-bottom:10px;display:flex}progress{width:100%;height:6px;accent-color:var(--teal)}.question{margin-top:30px}.question h2{max-width:900px;font-size:32px}.question form{max-width:560px}.question form button{margin-right:12px}.choices{grid-template-columns:1fr 1fr;gap:15px;margin:25px 0;display:grid}.choices button{text-align:left;min-height:65px;font-size:20px}.countdown{text-align:center;color:var(--teal);padding:60px;font-size:110px}.feedback{background:#fff6ee;border-left:4px solid #c98c30;margin:24px 0;padding:22px}.feedback.correct{background:#edf8f2;border-color:#2b8c64}.feedback>.button{width:fit-content;margin-top:20px;display:flex}.feedback p{margin:12px 0}.quiet{color:var(--muted);background:0 0;border:0;margin-top:15px;padding-left:0;text-decoration:underline}.timeline{counter-reset:event;padding:0;list-style:none}.timeline li{counter-increment:event;border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:12px 0;display:flex}.timeline li:before{content:counter(event);color:var(--teal);width:30px;font-size:22px}.timeline li span{flex:1}.timeline button{padding:9px}.map-tools{background:#fff;padding:14px}.map-tools .inline{align-items:center}.map-tools span{color:var(--muted);font-size:13px}.country{cursor:pointer}.country:hover{fill:#22586b}.country-list{flex-wrap:wrap;gap:8px;max-height:180px;padding:4px;display:flex;overflow:auto}.country-list button{min-height:44px;padding:8px 12px;font-size:14px}.result-metrics{flex-wrap:wrap;gap:45px;padding:25px 0;display:flex}.result-metrics strong{font-size:36px;display:block}.result-metrics span{color:var(--muted);font-size:14px}.history-row{border-bottom:1px solid var(--border);justify-content:space-between;gap:22px;padding:15px 0;font-size:15px;display:flex}.teacher-layout{grid-template-columns:260px 1fr;gap:30px;margin-top:24px;display:grid}.teacher-layout h2{font-size:28px}.review-item{border-bottom:1px solid var(--border);padding:20px 0}.review-item p{margin-bottom:8px;font-size:15px}.builder{margin-top:30px}.builder h2{font-size:26px}table{border-collapse:collapse;text-align:left;width:100%}th,td{border-bottom:1px solid var(--border);padding:12px;font-size:15px}.privacy{border:1px solid var(--border);border-radius:12px;max-width:600px;padding:30px;position:fixed;top:15%;box-shadow:0 20px 100px #1235}.sr{clip:rect(0, 0, 0, 0);width:1px;height:1px;position:absolute;overflow:hidden}.skip{z-index:100;background:#fff;padding:12px;position:absolute;top:-100px;left:10px}.skip:focus{top:8px}:focus-visible{outline-offset:4px;outline:3px solid #007eab}button,a,input,select{scroll-margin:20px}@media (width<=1000px){.table-label,.deck-row{grid-template-columns:minmax(0,1fr) 110px 75px 115px;gap:15px}.library-tools{flex-wrap:wrap}.deck-name{gap:15px}.explore{gap:24px}.explore-copy p{font-size:16px}}@media (width<=700px){header{flex-wrap:wrap;gap:10px;height:auto;min-height:64px;padding-top:10px;padding-bottom:10px}.brand{font-size:22px}nav{gap:15px;font-size:13px}nav .button{min-height:38px;font-size:13px}main{padding-top:26px}h1{letter-spacing:-1px}.explore{grid-template-columns:1fr;gap:25px}.explore-copy p{font-size:18px}.explore-copy h2{font-size:32px}.map-wrap svg{min-height:160px}.explore-copy .rule,.table-label{display:none}.deck-row{grid-template-columns:1fr auto;gap:8px;padding:20px 0}.deck-name{grid-column:1/-1}.deck-row>.subject{grid-column:1;margin-left:68px;font-size:13px}.deck-row>span:not(.subject){margin-left:68px;font-size:13px}.deck-row>.button{grid-area:2/2/4;width:auto}.deck-icon{width:48px;height:48px}.filters{gap:8px}.filters button{padding:9px 12px;font-size:13px}.search{width:100%}.deck-name h3{font-size:18px}.lead{margin-bottom:20px}footer{flex-wrap:wrap;gap:12px;font-size:12px}.choices{grid-template-columns:1fr}.question h2{font-size:26px}.play h1{font-size:30px}.teacher-layout{grid-template-columns:1fr}.result-metrics{gap:25px}.result-metrics strong{font-size:28px}.history-row{flex-wrap:wrap}.privacy{max-width:90vw;top:10%}.run-status{font-size:13px}.inline>label{min-width:100%}.inline>button{margin-bottom:0}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.mix-bar{flex-wrap:wrap;align-items:center;gap:1rem;font-size:.9rem;display:flex}.deck-name>input[type=checkbox]{accent-color:#128b98;width:18px;min-width:18px;height:18px}