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@media(max-width:640px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:238px}.sidebar.open{transform:translateX(0)}.workspace{margin-left:0}.mobile-menu{display:block}.topbar{height:61px;padding:0 18px}.breadcrumb{font-size:10px}.breadcrumb>span{margin:0 5px}.breadcrumb{white-space:nowrap}.private-badge{font-size:0;gap:0}.status-dot{height:7px;width:7px}main{padding:27px 18px;min-height:calc(100vh - 119px)}.eyebrow{font-size:9px;margin-bottom:13px}.hero h1{font-size:32px;letter-spacing:-1.3px}.hero p{font-size:12px;margin-bottom:17px}.hero-metrics{gap:13px;font-size:9px}.hero-metrics strong{font-size:11px}.subjects{gap:8px;margin-bottom:27px}.subject-card{padding:13px 10px;border-radius:10px}.subject-card strong{font-size:11px}.subject-card small{font-size:9px}.subject-card .subject-icon{height:31px;width:31px;border-radius:9px}.subject-icon svg{height:17px;width:17px}.filters{gap:7px}.filters select{max-width:none;min-width:0;font-size:10px}.filters select#track-filter{max-width:45%}.filters select#subject-filter{max-width:43%}.section-header .subtle{font-size:9px}.section-header h2{font-size:16px}.lesson-card-content{padding:18px}.lesson-card h3{font-size:19px}.lesson-art{height:122px}.page-footer{padding:18px;font-size:8px}.page-title{font-size:29px}.lesson-heading h1{font-size:30px;letter-spacing:-1px}.lesson-content{padding:22px 18px;font-size:13px}.lesson-content h2{font-size:19px}.lesson-content p{font-size:13px}.tabs button{padding:11px 14px;font-size:11px}.lesson-actions{gap:6px}.lesson-actions .secondary{font-size:10px;padding:8px 12px}.lesson-actions .secondary svg{width:14px}.question-text{font-size:13px}.question-head{gap:8px}.question-number{width:21px}.solution{margin-left:29px}.fraction-bar{height:42px;gap:4px}.class-note{font-size:9px;max-width:110px;text-align:right}.plan-class summary{padding:14px}.class-name{font-size:12px}.plan-body{padding:16px}.toast{left:50%;font-size:11px;width:max-content}.teacher-step{gap:8px}.teacher-step strong{width:63px}.plan-ready{align-items:flex-start;font-size:11px}.plan-ready a{font-size:10px}.intro-row{align-items:flex-start}.section-badge{font-size:9px;white-space:nowrap}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{body{background:#fff;font-size:12pt;color:#000}.sidebar,.topbar,.page-footer,.lesson-back,.lesson-actions,.tabs,.lesson-info,.toast,.shade,.skip,.solution,.quiz,.copy-homework,.demo-caption button,.feature,.filters,.next-section{display:none!important}.workspace{margin:0}main{padding:0;max-width:none;min-height:0}.lesson-heading h1{font-size:24pt;max-width:none}.lesson-layout{display:block}.lesson-content{border:0;padding:0;line-height:1.6}.lesson-content p,.question-text{font-size:12pt;color:#000}.question{break-inside:avoid;padding:12px 0}.question-number{background:none;color:#000}.fraction-bar button{print-color-adjust:exact;-webkit-print-color-adjust:exact}.print-label{display:block;font-size:10pt}.teacher-keys{display:block}.teacher-keys>summary{font-size:13pt}.teacher-keys .solution{display:block!important}.lesson-kicker{color:#444}.page-title{font-size:24pt}.plan-class{break-inside:avoid}}

.visitor-header{display:flex;align-items:center;gap:16px}.visitor-header #visitor-account{display:flex;align-items:center;gap:12px;font-size:11px}.visitor-header a{color:var(--green);font-weight:600}.visitor-header a:hover,.page-footer a:hover{text-decoration:underline}.page-footer a{color:var(--green)}@media(max-width:640px){.visitor-header{gap:8px}.visitor-header #visitor-account{font-size:10px;gap:6px}.visitor-header .private-badge{display:none}.topbar{gap:8px}.topbar .breadcrumb{font-size:9px}}
.visitor-account-name{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media(max-width:640px){.visitor-account-name{display:none}}

.visitor-account-button{border:0;padding:0;background:none;color:var(--green);font:inherit;font-weight:600;cursor:pointer}.visitor-account-button:hover{text-decoration:underline}.visitor-account-button:disabled{opacity:.5;cursor:wait}.visitor-account-button:focus-visible{outline:2px solid var(--green);outline-offset:4px}