/* Explicit icon geometry keeps fallback fonts from changing the composition. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
.ui-icon{display:block;width:20px;height:20px;flex:0 0 20px;overflow:visible}
.tiny-star{display:inline-flex;align-items:center}.tiny-star .ui-icon{width:16px;height:16px;flex-basis:16px}
.sunburst .ui-icon{width:42px;height:42px}.custom-watermark .ui-icon{width:320px;height:320px}
.fraction-spark .ui-icon{width:26px;height:26px}
.hero-bottom i .ui-icon{width:14px;height:14px;flex-basis:14px}
.method-steps .step-icon{width:38px;flex:0 0 38px}.step-icon .ui-icon{width:20px;height:20px}
.closing-stamp .ui-icon{width:23px;height:23px}
.button>span,.card-link>span,.studio-link>span,.art-bottom>span{font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1;flex-shrink:0}
@media(max-width:700px){
 :root{--muted:#69735f}
 html{scroll-padding-top:85px}body{font-size:15px}
 .wrap{padding-left:20px;padding-right:20px}
 .header{height:76px;padding:0 20px;gap:12px}
 .brand{font-size:36px;gap:11px}.brand-name{font-size:10px;letter-spacing:2px}
 .studio-link{font-size:12px;min-height:44px;padding:11px 15px}.studio-link span{margin-left:9px}
 .hero{width:calc(100% - 24px);padding:30px 20px 0;border-radius:24px;gap:24px;margin-bottom:27px}
 .hero::before{width:270px;height:270px;top:-220px;left:-150px}
 .hero-copy{text-align:left;min-width:0}
 .hero-copy .eyebrow{justify-content:flex-start;font-size:9px;line-height:1.6;letter-spacing:1px;gap:8px}
 h1{font-size:clamp(38px,11.7vw,52px);line-height:1.06;letter-spacing:-2px;margin:22px 0 18px}
 .hero-copy>p{font-size:15px;line-height:1.7;color:#65735b;max-width:320px}
 .hero-copy .desktop{display:none}
 .hero-actions{display:grid;grid-template-columns:1fr;gap:4px;margin-top:24px}
 .hero-actions .button{width:100%;font-size:14px;padding:16px 19px;min-height:54px;border-radius:12px}
 .hero-actions .text-link{font-size:13px;min-height:44px;justify-content:center;gap:12px;padding:12px}
 .hero-note{font-size:11px;line-height:1.6;justify-content:flex-start;margin-top:10px;gap:8px}
 .mini-check{display:grid;place-items:center;width:17px;height:17px;padding:0;font-size:10px;flex-shrink:0}
 .hero-art{width:100%;max-width:none;height:auto;min-height:0;margin:0;transform:none;border-radius:15px;padding-bottom:13px;overflow:hidden;box-shadow:0 8px 22px #2d412514}
 .demo-chrome{min-height:38px;padding:0 12px;gap:8px;font-size:8px;letter-spacing:.5px;border-radius:14px 14px 0 0}
 .demo-chrome>span:nth-child(2){font-size:0}.demo-chrome>span:nth-child(2)::after{content:'TRY A REAL QUESTION';font-size:8px}
 .window-dots{gap:4px}.window-dots i{width:5px;height:5px}.live-pill{font-size:7px;padding:5px 6px;letter-spacing:.4px}
 .practice-card{width:calc(100% - 22px);margin:12px auto 0;padding:17px 15px 15px;transform:none;border-radius:11px;z-index:1}
 .practice-top{font-size:8px;letter-spacing:.5px;gap:8px}.question-pill{font-size:8px;padding:5px 6px;letter-spacing:0}
 .dot{width:5px;height:5px;margin-right:4px}.mini-progress{margin:13px 0 16px}
 .practice-card .label{font-size:8px;letter-spacing:.8px}.practice-card h2{font-size:23px;line-height:1.2;margin-top:8px}
 .equation{font-size:34px;line-height:1.3;margin:17px 0;padding:19px 0}
 .hero-answers{gap:8px}.hero-answers button{min-height:46px;font-size:13px;padding:10px 0}
 .hero-feedback{font-size:11px;line-height:1.6;min-height:34px;padding-top:15px}.hero-feedback>span{font-size:14px}
 .insight-card{position:relative;inset:auto;margin:12px 11px 0;padding:11px 12px;transform:none;gap:10px;width:calc(100% - 22px);box-shadow:none;z-index:1;border-radius:9px}
 .insight-icon{width:29px;height:29px;flex-shrink:0}.insight-icon .ui-icon{width:18px;height:18px}
 .insight-card strong{font-size:11px;line-height:1.5}.insight-card div>span{font-size:10px;margin-top:2px;line-height:1.5}
 .sunburst,.art-caption{display:none}
 .hero-bottom{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin:0;padding:20px 0 23px;font-size:12px;line-height:1.4}
 .hero-bottom>span{gap:10px}.hero-bottom i{width:25px;height:25px;flex-shrink:0}
 .subject-strip{padding:0 0 8px}.subject-strip>.wrap{justify-content:center;gap:8px}
 .subject-strip span:first-child{flex-basis:100%;max-width:none;text-align:center;font-size:9px;letter-spacing:1px;margin:1px 0 5px}
 .subject-strip span{font-size:11px;padding:7px 10px;background:#eff1e7;border:1px solid #e0e5d6;border-radius:20px}
 .subject-strip span:first-child{padding:0;background:none;border:0}.subject-strip i{display:none}
 .section{padding-top:43px;padding-bottom:43px}
 .eyebrow{font-size:9px;letter-spacing:1px;line-height:1.6}
 .section-heading{display:block;margin-bottom:23px}.section-heading h2{font-size:34px;line-height:1.12;letter-spacing:-1px;margin-top:12px}
 .section-heading p{font-size:13px;line-height:1.65;margin-top:13px}.section-heading p br{display:none}
 .shelf-toolbar{gap:10px;align-items:center}.shelf-status{font-size:8px;letter-spacing:.6px}.shelf-toolbar>span:last-child{font-size:12px}
 .activity-grid{grid-template-columns:1fr;gap:20px}.activity-card{padding:8px;border-radius:22px}
 .activity-art{height:213px;padding:16px;border-radius:15px}
 .art-tag{font-size:8px;letter-spacing:.7px;padding:7px 9px}.art-bottom{font-size:8px;letter-spacing:.2px;line-height:1.5;gap:8px}.art-bottom>span{font-size:16px}
 .pipe-visual,.sat-visual,.fraction-visual,.statistics-visual,.ged-visual,.gre-visual{height:132px;max-width:100%;width:245px}
 .pipe-visual{transform:scale(.86);transform-origin:center}.sat-visual{width:238px}.big-x{font-size:87px;top:-7px}.math-label{font-size:18px;top:8px;left:20px}.orbit{width:82px;height:44px;top:29px;left:-22px}.scribble{font-size:14px;top:78px;right:0}.floating-math{font-size:11px;bottom:0;left:0}
 .fraction-circle{width:104px;height:104px;left:5px;top:10px}.fraction-circle span{font-size:32px;left:29px;top:31px}.fraction-label{font-size:21px;top:27px;right:2px}.fraction-label span{font-size:20px}.fraction-spark{top:0;right:23px}
 .statistics-visual svg{height:130px;padding-top:12px}.formula-note{font-size:12px;top:0}.statistics-visual .math-sticker{bottom:0;font-size:15px}
 .ged-note{font-size:17px;top:0}.ged-steps{height:85px;bottom:8px;left:23px}.ged-steps>span{width:51px;height:35px}.ged-steps>span:nth-child(2){height:54px}.ged-steps>span:nth-child(3){height:77px}.ged-steps b{font-size:22px;top:-12px}.ged-visual .math-sticker{font-size:10px;bottom:-4px}
 .gre-note{font-size:14px;top:0}.comparison{top:25px;left:15px;right:15px;gap:16px}.comparison>div{height:74px;width:78px}.comparison b{font-size:37px}.comparison>span{font-size:20px}.comparison small{font-size:7px;letter-spacing:.5px}.gre-visual .math-sticker{font-size:12px;bottom:-1px}
 .activity-info{padding:17px 12px 12px}.activity-features{font-size:10px;gap:7px;flex-wrap:wrap;padding-bottom:18px}.activity-features span{padding:7px 8px}
 .card-meta{font-size:9px;letter-spacing:.7px;gap:8px}.card-meta>span{font-size:9px;letter-spacing:0}
 .activity-info h3{font-size:28px;line-height:1.16;letter-spacing:-.7px;margin:13px 0 12px}.activity-info p{font-size:14px;line-height:1.7;margin-bottom:22px;min-height:0}
 .card-link{min-height:50px;font-size:13px;padding:15px 17px;border-radius:11px}.shelf-note{font-size:11px;line-height:1.7;margin-top:18px;color:#748068}
 .deliverable-section{padding-bottom:43px}.file-preview-layout{gap:24px}.file-format-badge{font-size:9px;line-height:1.6;letter-spacing:.5px}.file-format-badge>span{font-size:15px}
 .file-preview-copy h3{font-size:31px;margin:15px 0}.file-preview-copy>p{font-size:14px;line-height:1.7;color:#69775e}
 .file-feature strong{font-size:14px;line-height:1.5;margin:0 0 4px}.file-feature small{font-size:12px;line-height:1.7;color:#728168}.file-feature>span{height:28px;width:28px;font-size:10px}
 .file-preview-copy .button{font-size:13px;min-height:50px;width:100%;margin-top:17px}.download-caption{font-size:11px;line-height:1.7}
 .file-preview-window{border-radius:16px}.file-preview-toolbar{height:46px;padding:0 12px}.file-preview-toolbar>span:nth-child(2){font-size:10px}.file-preview-toolbar>button{width:32px;height:32px;font-size:18px}
 .preview-tabs{display:flex;flex-wrap:nowrap;overflow-x:auto;gap:5px;padding:10px;scrollbar-width:thin;scroll-snap-type:x proximity}
 .preview-tabs button{flex:0 0 auto;min-height:44px;font-size:12px;padding:11px 13px;scroll-snap-align:start;border-radius:8px}
 #deliverable-frame{height:610px}.file-preview-caption{padding:11px 12px;gap:8px}.file-preview-caption>span{font-size:8px;letter-spacing:.2px}.file-preview-caption button{min-height:44px;font-size:12px;padding:8px 0}
 .method-grid{width:calc(100% - 24px);padding:29px 20px;border-radius:23px;gap:26px}.method h2{font-size:39px;line-height:1.1}.method p{font-size:14px;line-height:1.7}.method .text-link{font-size:13px;min-height:44px}
 .method-steps>div,.method-steps>div:last-child{padding:19px 15px;gap:14px;border-radius:14px}.method-steps h3{font-size:25px;line-height:1.15}.method-steps p{font-size:13px;line-height:1.7}.method-steps>div>.step-icon{width:34px;min-width:34px;flex-basis:34px;height:34px}.step-icon small{font-size:8px}
 .custom-box{padding:29px 22px 32px;border-radius:23px;gap:30px}.custom-watermark{display:none}
 .custom-copy .eyebrow{font-size:8px;line-height:1.7}.custom-badge{font-size:8px;letter-spacing:.5px}.custom-copy h2{font-size:33px;line-height:1.14}.custom-copy p{font-size:14px;line-height:1.7}.custom-copy .button{font-size:13px;min-height:51px;width:100%;padding:15px}.custom-copy small{font-size:11px;line-height:1.7}
 .brief-art{transform:none;max-width:none;width:100%;padding:28px 18px 20px;box-shadow:5px 5px 0 #e4e8d626}.brief-art .label{font-size:9px;letter-spacing:.7px}.brief-art h3{font-size:27px}.brief-art>div:not(.paper-clip){font-size:11px;line-height:1.7}.brief-art>div>span{font-size:10px;margin-right:7px}.paper-signature{font-size:13px}.paper-signature span{font-size:24px;line-height:1}
 .faq{padding-top:4px;gap:24px;padding-bottom:42px}.faq h2{font-size:33px}.faq summary{font-size:14px;line-height:1.5;min-height:28px}.faq summary span{width:24px;height:24px;font-size:18px}.faq p{font-size:13px;line-height:1.75}.faq details,.faq details:first-child{padding:18px 16px;border-radius:13px}
 .closing{width:calc(100% - 24px);padding:30px 20px 32px;border-radius:23px;margin-bottom:28px}.closing h2{font-size:32px;line-height:1.15;letter-spacing:-1px}.closing .button{font-size:13px;min-height:51px;width:100%}
 footer{gap:14px;flex-wrap:wrap;align-items:center}footer>span{font-size:11px}footer>div{font-size:10px;gap:18px}footer button{font-size:12px;min-height:44px}
 dialog{width:calc(100% - 20px);max-height:calc(100dvh - 24px);border-radius:20px;margin:auto;overscroll-behavior:contain}
 #modal-body{padding:52px 22px 27px}.close{top:10px;margin:10px 10px -54px 0;width:40px;height:40px;font-size:25px;background:#f7f8f1}
 .modal-eyebrow{font-size:10px;line-height:1.6}.modal-title{font-size:32px;line-height:1.1}.modal-subtitle{font-size:14px;line-height:1.7}.form-field{font-size:13px}.form-field input,.form-field select,.form-field textarea{font-size:16px;min-height:48px;padding:13px 11px}.form-grid{grid-template-columns:1fr;gap:0}.form-note{font-size:12px;line-height:1.7}.modal-buttons .button,.button{font-size:13px;min-height:48px}.studio-item p{font-size:12px;line-height:1.6}.studio-item button{font-size:13px;min-height:44px}.subtle-btn{font-size:12px;min-height:44px}
 #activity-preview{width:100%;max-width:100%;height:100dvh;max-height:100dvh;margin:0;border:0;border-radius:0}
 .activity-preview-bar{padding:max(12px,env(safe-area-inset-top)) 14px 12px;gap:12px}.activity-preview-bar>div:first-child{min-width:0}.activity-preview-bar>div:first-child>span{font-size:8px;letter-spacing:.6px;line-height:1.5}.activity-preview-bar h2{font-size:20px;line-height:1.2;margin-top:5px}
 .activity-preview-actions{gap:7px;flex-shrink:0}.activity-preview-actions>a{font-size:11px;min-height:44px;display:flex;align-items:center;padding:9px 10px}.activity-preview-actions>button{width:44px;height:44px;font-size:25px}
}
@media(max-width:360px){
 .wrap{padding-left:16px;padding-right:16px}.header{padding:0 16px}.hero{padding:26px 16px 0}.hero-copy .eyebrow{font-size:8px;letter-spacing:.6px}.hero-copy>p{font-size:14px}h1{font-size:38px;letter-spacing:-1.8px}
 .practice-card{padding:16px 12px}.practice-top{font-size:7px}.practice-card h2{font-size:21px}.equation{font-size:30px}.hero-answers{gap:6px}.hero-answers button{font-size:12px}.insight-card strong{font-size:10px}
 .section-heading h2{font-size:31px}.shelf-toolbar>span:last-child{font-size:11px}.activity-info{padding-left:10px;padding-right:10px}.activity-info h3{font-size:26px}.art-bottom{font-size:7px}.art-tag{font-size:7px}.card-meta{font-size:8px}.card-meta>span{font-size:8px}
 .method-grid{padding:26px 18px}.custom-box{padding:27px 18px}.custom-copy h2{font-size:30px}.brief-art{padding-left:15px;padding-right:15px}.brief-art>div:not(.paper-clip){font-size:10px}.paper-signature{font-size:12px}
 .activity-preview-bar{padding-left:10px;padding-right:10px;gap:7px}.activity-preview-bar h2{font-size:17px}.activity-preview-bar>div:first-child>span{font-size:7px}.activity-preview-actions>a{font-size:10px;padding:8px}.activity-preview-actions>button{width:40px}
}
/* Keep background scrolling from competing with an open activity on touch screens. */
body:has(dialog[open]){overflow:hidden}