/* A quieter, section-first workspace. */
.simple-shell main{max-width:1400px;margin:0 auto;padding:28px 36px 70px;min-width:0}.simple-shell .topbar{min-height:70px;padding:14px 36px;gap:15px;flex-wrap:wrap}.simple-shell .topbar>div{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.simple-shell .topbar select{width:auto;max-width:175px}.simple-shell .sidebar{width:230px}.simple-shell{grid-template-columns:230px minmax(0,1fr)}.simple-shell .sidebar-card{display:none}.simple-shell .sidefoot{display:flex;flex-direction:column;gap:10px}.simple-shell .brand{padding-bottom:32px}.simple-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 0 25px;min-height:70px}.simple-heading h1{font-size:clamp(26px,3vw,38px);line-height:1.18;margin:6px 0}.simple-heading p{margin:8px 0 0}.simple-heading>.row{justify-content:flex-end;flex-wrap:wrap}.section-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:23px}.main-section-card{display:block;padding:0;overflow:hidden;border:1px solid var(--line);border-radius:23px;text-align:left;background:var(--surface);transition:transform .2s,box-shadow .2s}.main-section-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px #56301214}.section-illustration{height:180px;position:relative;overflow:hidden}.section-illustration>.embedded-art{width:100%;height:100%;display:block;object-fit:cover}.section-card-copy{padding:20px 24px}.section-card-copy h2{font-size:26px;margin:0 0 7px}.section-card-copy p{margin:0;color:var(--muted)}.section-card-copy footer{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:20px;padding-top:15px;font-size:13px}.section-card-copy footer span{font-weight:650;color:var(--ink)}.simple-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.topic-box{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:23px}.topic-box h2{font-size:22px;margin:16px 0}.subtopic-entry{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;background:var(--soft);border:1px solid var(--line);padding:18px;border-radius:13px}.subtopic-entry h3{margin:6px 0 0}.planned-disclosure{margin-top:17px;color:var(--muted);font-size:13px}.difficulty-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}.difficulty-card{display:flex;gap:13px;text-align:left;padding:20px 17px;border:1px solid var(--line);border-radius:17px;background:var(--surface);transition:transform .2s}.difficulty-card:hover{transform:translateY(-2px)}.difficulty-card.selected{border:2px solid var(--accent);padding:19px 16px;background:var(--soft)}.difficulty-card h2{font-size:20px;margin:2px 0 8px}.difficulty-card h2 small{display:block;font-size:12px;color:var(--muted);margin-top:5px}.difficulty-card p{font-size:13px;color:var(--muted);margin:0 0 12px;line-height:1.5}.difficulty-card b{font-size:12px}.level-orb{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--soft);color:var(--accent);font:20px Georgia;flex-shrink:0}.category-prompt{text-align:center;padding:36px;color:var(--muted)}.question-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:26px 0 18px}.question-toolbar>div{display:flex;gap:8px;flex-wrap:wrap}.question-toolbar input{max-width:170px}.question-toolbar select{width:auto}.question-card-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.question-card{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:21px;min-width:0}.question-card h3{font:500 20px/1.5 Cambria Math,Cambria,Georgia,serif;margin:19px 0}.question-card .badge{font-size:11px}.question-card details{font-size:13px;flex:1;min-width:0}.question-card details p{overflow-wrap:anywhere}.question-card .row{align-items:flex-start}.question-card .row>button{flex-shrink:0}.selection-summary{display:flex;align-items:center;justify-content:space-between;gap:12px}.selection-summary p{margin:5px 0 0}.selection-summary>div:last-child{display:flex;gap:8px}.project-strip{display:flex;justify-content:space-between;align-items:center;gap:15px;background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px;margin:15px 0}.project-strip small{display:block;color:var(--muted);margin-top:6px}.simple-shell .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:20px}.simple-shell label{min-width:0}.simple-shell input,.simple-shell select,.simple-shell textarea{font:inherit;max-width:100%;box-sizing:border-box}.simple-shell textarea{width:100%;padding:13px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);line-height:1.5;resize:vertical}.simple-shell input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0}.simple-shell [hidden]{display:none!important}.simple-shell .panel{margin:20px 0}.simple-shell .manual-picker{margin-top:20px}.manual-picker .question-card-list{margin-top:18px}.review-question{display:flex;align-items:center;gap:14px;padding:15px 0;border-top:1px solid var(--line)}.review-question>div{flex:1;min-width:0}.review-question label{width:85px;flex-shrink:0;font-size:12px}.review-question p{font-family:Cambria Math,Cambria,Georgia,serif;font-size:18px;line-height:1.4}.round-list-card{display:flex;justify-content:space-between;align-items:center;gap:24px}.round-list-card h2{font-size:23px;margin:15px 0 9px}.round-list-card p{margin:7px 0}.round-actions{display:flex;flex-direction:column;gap:9px;flex-shrink:0}.score-banner{display:grid;grid-template-columns:1fr 1fr;gap:24px;border-radius:20px;background:var(--soft);padding:28px;margin:22px 0}.score-banner h2{font-size:45px;margin:10px 0}.score-banner small{font-size:20px}.challenge-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:24px;align-items:start}.challenge-layout .panel{margin-top:0}.challenge-shortcut,.challenge-history{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;padding:22px;text-align:left;border:1px solid var(--line);border-radius:16px;background:var(--surface);margin:16px 0}.challenge-shortcut>span{font-size:35px;color:var(--accent)}.challenge-shortcut>div{flex:1}.challenge-shortcut p,.challenge-history p{margin:6px 0 0;color:var(--muted)}.tower-widget{position:sticky;top:24px;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--surface)}.tower-widget>div:last-child{padding:18px}.tower-widget .eyebrow{font-size:10px;display:block;margin-bottom:10px}.tower-widget b{display:block;font-size:19px}.tower-widget p{font-size:13px;margin:9px 0;line-height:1.5}.tower-widget small{display:block;font-size:11px;line-height:1.5;color:var(--muted)}.tower-sky{height:230px;position:relative;display:flex;align-items:flex-end;justify-content:center;background:linear-gradient(160deg,#f3c5a3,#fce8d4 65%,#d3dcdf);overflow:hidden}.tower-star{position:absolute;right:27px;top:24px;font-size:30px;color:#995527}.tower-building{width:94px;display:flex;flex-direction:column;align-items:center}.tower-roof{width:74px;height:12px;background:#665645;clip-path:polygon(20% 0,80% 0,100% 100%,0 100%)}.tower-floor{width:80px;height:21px;background:#9c6644;border:1px solid #654936;display:flex;gap:8px;align-items:center;justify-content:center}.tower-floor i{width:11px;height:11px;background:#ffe4a8;border-radius:1px}.tower-base{width:102px;height:20px;background:#655342;border-top:5px solid #b2825c}.challenge-play-heading{display:flex;justify-content:space-between;gap:10px;align-items:center;color:var(--muted);font-size:12px}.challenge-answer{padding:18px;border-radius:13px;background:var(--soft);border:1px solid var(--line);margin-top:18px}.challenge-answer.correct{border-color:var(--good)}.difficulty-matrix{width:100%;border-collapse:separate;border-spacing:6px;text-align:left}.difficulty-matrix th{font-size:12px;color:var(--muted);padding:9px;min-width:80px}.difficulty-matrix tbody th{min-width:140px;color:var(--ink)}.matrix-cell{width:100%;padding:13px 10px;display:flex;flex-direction:column;gap:5px;border:1px solid var(--line);border-radius:11px;background:var(--soft);color:var(--ink)}.matrix-cell b{font-size:20px}.matrix-cell small{font-size:11px}.matrix-cell.check{border-left:4px solid var(--bad)}.matrix-cell.revisit{border-left:4px solid var(--accent)}.matrix-cell.positive{border-left:4px solid var(--good)}.matrix-scroll{overflow-x:auto}.weighted-summary{display:flex;justify-content:space-between;gap:12px;padding:14px 0;border-top:1px solid var(--line)}.weighted-summary span{font-size:12px;color:var(--muted)}.simple-shell button:focus-visible,.simple-shell input:focus-visible,.simple-shell select:focus-visible,.simple-shell textarea:focus-visible,.simple-shell summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.simple-shell .round h1{font-size:30px}.simple-shell .round{max-width:850px}.simple-shell .matching-list{gap:12px}.simple-shell .planned-disclosure summary{font-weight:500}
[data-theme=dark] .tower-sky{background:linear-gradient(145deg,#667e90,#8a9498 70%,#c8a68a)}[data-theme=dark] .tower-star{color:#ffe1b7}
@keyframes floor-rise{from{opacity:.4;transform:translateY(7px)}to{opacity:1;transform:none}}
@media(min-width:1500px){.section-illustration{height:220px}}
@media(max-width:1100px){.simple-shell{grid-template-columns:190px minmax(0,1fr)}.simple-shell .sidebar{width:190px}.simple-shell main{padding:24px}.difficulty-grid{gap:9px}.difficulty-card{padding:16px 12px;gap:8px}.difficulty-card.selected{padding:15px 11px}.level-orb{display:none}.challenge-layout{grid-template-columns:minmax(0,1fr) 210px;gap:16px}.question-toolbar{flex-wrap:wrap}}
@media(max-width:800px){.simple-shell{display:block}.simple-shell .sidebar{position:relative;width:auto;height:auto;padding:16px 20px}.simple-shell .sidebar .brand{padding:0 0 15px;font-size:25px}.simple-shell .sidebar .brand small,.simple-shell .workspace-label,.simple-shell .sidefoot{display:none}.simple-shell .nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.simple-shell .nav button{padding:12px 8px;justify-content:center;font-size:12px;gap:7px}.simple-shell .nav .ui-icon{width:16px;height:16px}.simple-shell .topbar{padding:12px 20px;min-height:55px}.simple-shell .breadcrumb{display:none}.simple-shell .topbar>div{width:100%;justify-content:space-between;gap:7px}.simple-shell .topbar button{font-size:11px;padding:9px}.simple-shell main{padding:22px 20px 60px}.simple-heading{align-items:flex-start;flex-wrap:wrap;gap:14px}.simple-heading h1{font-size:29px}.simple-heading>.row{justify-content:flex-start}.section-illustration{height:145px}.section-card-copy{padding:16px}.section-card-copy h2{font-size:23px}.section-card-copy p{font-size:13px}.section-card-copy footer{flex-direction:column;gap:5px}.simple-topic-grid{gap:14px}.topic-box{padding:18px}.difficulty-card h2{font-size:18px}.challenge-layout{grid-template-columns:1fr}.tower-widget{position:relative;display:grid;grid-template-columns:120px minmax(0,1fr);grid-row:1}.tower-sky{height:150px}.tower-floor{height:13px;width:64px}.tower-floor i{height:7px;width:8px}.tower-widget>div:last-child{padding:15px}.tower-widget .progress{margin:10px 0}.tower-star{font-size:23px;top:13px;right:12px}.tower-widget small{font-size:10px}.challenge-layout .tower-widget{margin-bottom:5px}.score-banner{padding:23px}.question-toolbar>div{width:100%}}
@media(max-width:540px){.simple-shell main{padding:18px 15px 50px}.section-card-grid{gap:12px}.section-illustration{height:115px}.section-card-copy{padding:14px 12px}.section-card-copy h2{font-size:20px}.section-card-copy p{font-size:12px;line-height:1.5}.section-card-copy footer{font-size:11px;margin-top:13px;padding-top:10px}.main-section-card{border-radius:16px}.simple-topic-grid{grid-template-columns:1fr}.difficulty-grid{grid-template-columns:1fr;gap:10px}.difficulty-card{padding:15px;gap:15px}.difficulty-card.selected{padding:14px}.difficulty-card h2 small{display:inline;margin-left:9px;font-size:12px}.difficulty-card p{margin-bottom:7px}.level-orb{display:grid}.question-card-list{grid-template-columns:1fr}.simple-shell .form-grid{grid-template-columns:1fr;gap:15px}.simple-shell .panel{padding:20px 16px}.selection-summary{flex-direction:column;align-items:stretch}.selection-summary>div:last-child{justify-content:space-between}.review-question{flex-wrap:wrap;gap:9px}.review-question>div{flex-basis:100%}.round-list-card{flex-direction:column;align-items:stretch;gap:12px}.round-actions{flex-direction:row;flex-wrap:wrap}.score-banner{grid-template-columns:1fr}.score-banner h2{font-size:37px}.weighted-summary{flex-direction:column}.question-toolbar input{max-width:100%;width:100%}.question-toolbar h2{font-size:20px}.simple-shell .nav button{font-size:11px;gap:4px;padding:12px 6px}.simple-shell .nav .ui-icon{display:none}.simple-shell .topbar{padding:10px 15px}.challenge-play-heading{flex-wrap:wrap}.simple-heading h1{font-size:27px}.challenge-history{padding:17px}.tower-widget b{font-size:17px}}
@media(prefers-reduced-motion:reduce){.simple-shell *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.compact-marketing{padding-top:60px;padding-bottom:55px}.compact-marketing .hero-copy h1{font-size:clamp(40px,4.6vw,66px)}