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@media(min-width:1600px){main{padding-top:50px}.lesson-layout{grid-template-columns:minmax(0,1fr) 265px;gap:30px}.question-panel{padding:25px}.placeholder-body h3{font-size:32px}.video-tag{font-size:8px}.placeholder-body p{font-size:13px}}
@media(max-width:1200px){.sidebar{width:222px;padding:27px 18px}.main-shell{margin-left:222px}main{padding:30px 27px}.topbar{padding:0 27px}.lesson-layout{grid-template-columns:minmax(0,1fr) 210px;gap:18px}.question-panel{padding:20px 15px}.number-grid{gap:5px}h1{font-size:31px}.video-corner{top:17px;left:20px}.video-corner span{display:none}.placeholder-body{padding:42px 10px 38px}.play-symbol{width:38px;height:38px;margin-bottom:11px}.placeholder-body h3{font-size:22px;margin:10px 0 7px}.video-tag{font-size:6px}.video-bottom{bottom:13px;left:20px;right:20px}.lesson-card-top{padding:17px 19px}.problem-card{padding:21px}.lesson-actions{padding:12px 19px}}
@media(max-width:1000px){.sidebar{width:200px;padding:25px 15px}.brand{font-size:17px;gap:9px}.brand>svg{width:29px}.brand small{font-size:6px}.main-shell{margin-left:200px}.book-marker{padding:12px 10px;gap:9px}.book-marker div>span{font-size:9px}.nav-item{font-size:11px;gap:7px}.nav-item span{display:none}.lesson-layout{grid-template-columns:minmax(0,1fr)}.question-panel{position:static;grid-row:1}.question-panel>p,.question-key,.small-tip{display:none}.question-panel{padding:17px 19px}.question-panel .section-heading{margin-bottom:12px}#questionGrid{display:flex;gap:12px}.point-group{flex:10;min-width:0}.point-group:last-child{flex:6}.point-label{margin:0 0 7px}.number-grid{grid-template-columns:repeat(5,1fr);gap:5px}.point-group:last-child .number-grid{grid-template-columns:repeat(3,1fr)}.question-button{aspect-ratio:auto;min-height:29px}.page-heading{gap:14px}.page-heading .button{font-size:10px;padding:10px}.page-heading .button svg{display:none}.placeholder-body{padding:55px 10px 45px}.play-symbol{width:48px;height:48px;margin-bottom:16px}.placeholder-body h3{font-size:28px}.video-tag{font-size:7px}.placeholder-body p{font-size:12px}}
@media(max-width:700px){.sidebar{position:static;width:auto;height:auto;padding:20px 20px 0;border-right:0;border-bottom:1px solid var(--line);overflow:visible}.brand{font-size:20px}.brand small{font-size:7px}.brand>svg{width:33px;height:33px}.book-marker,.rounds-heading,.round-list,.sidebar-bottom{display:none}.primary-nav{flex-direction:row;margin-top:20px;gap:6px}.nav-item{font-size:12px;flex:1;border-radius:7px 7px 0 0;padding:12px 13px}.nav-item span{display:block;font-size:9px}.main-shell{margin-left:0}.topbar{height:38px;padding:0 21px}.topbar-title{font-size:7px;letter-spacing:1px}.preview-badge{font-size:9px}main{padding:27px 20px 20px}.page-heading{align-items:flex-start;margin-bottom:23px}.page-heading .eyebrow{font-size:8px}.page-heading h1{font-size:31px;letter-spacing:-1px}.page-heading p{font-size:11px}.page-heading .button{font-size:0;width:36px;height:36px;padding:7px;margin-top:21px;min-height:0;flex-shrink:0}.page-heading .button svg{display:block;width:18px;height:18px}.mobile-round{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 0 13px;font-size:11px;color:var(--muted)}.mobile-round select{border:1px solid var(--line);border-radius:6px;background:#fff;padding:7px 30px 7px 12px;color:var(--navy);font-size:11px}.question-panel{padding:16px}.question-panel .section-heading h2{font-size:13px}#questionGrid{gap:9px}.number-grid{gap:4px}.question-button{font-size:10px;min-height:28px;border-radius:4px}.point-label{font-size:7px}.lesson-layout{gap:16px}.lesson-card-top{padding:17px 16px}.lesson-ident>span{font-size:25px;padding-right:12px}.lesson-ident{gap:12px}.lesson-ident h2{font-size:15px}.lesson-actions{padding:12px 15px;font-size:9px}.lesson-actions .text-button{font-size:9px}.video-corner{font-size:8px;top:15px;left:17px}.placeholder-body{padding:38px 7px 35px}.play-symbol{width:36px;height:36px;margin:0 auto 10px}.play-symbol svg{width:21px;height:21px}.video-tag{font-size:5px;letter-spacing:1.4px}.placeholder-body h3{font-size:22px;margin:9px 0 6px}.placeholder-body p{font-size:9px}.video-bottom{left:16px;right:16px;bottom:12px;font-size:6px}.video-bottom span:last-child{font-size:6px;padding:4px 7px}.problem-card{padding:20px 18px}.problem-text{font-size:13px;line-height:1.8;margin:20px 0 18px}.choices{gap:7px}.choices li{padding:8px 10px;font-size:11px;gap:7px}.notes-card{padding-top:21px}.lesson-navigation .button{font-size:10px;padding:10px 12px}footer{font-size:8px;gap:7px;flex-wrap:wrap;margin-top:34px}.footer-note{display:block;flex-basis:100%;margin:0;font-size:8px;font-weight:400}.saved-card{padding:20px}.saved-card h2{font-size:17px}.saved-card p{font-size:11px}.saved-card .button{font-size:10px;padding:10px;white-space:nowrap}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.question-button{padding:0;min-width:0}
@media(max-width:700px){.mobile-round{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mobile-round>div{display:flex;align-items:center;gap:8px}.mobile-round label{font-size:10px}.mobile-round select{width:100%;min-width:0;padding:8px 4px;font-size:10px}.question-panel{grid-row:auto}.lesson-column{grid-row:1}#questionGrid{display:block}.point-label{margin:18px 0 9px;font-size:9px}.number-grid,.point-group:last-child .number-grid{grid-template-columns:repeat(5,1fr);gap:8px}.question-button{min-height:41px;font-size:12px}.question-panel .section-heading h2{font-size:15px}}

.publisher-home{font-size:13px;color:#274a4b;text-decoration:none;font-weight:650;white-space:nowrap}.topbar{gap:18px}.topbar-title{margin-left:auto}@media(max-width:600px){.topbar-title,.mobile-brand{display:none}.preview-badge{margin-left:auto}}