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7px}.fraction-visual{gap:8px;padding:20px 10px}.fraction-cells{height:33px}.fraction-visual strong{font-size:14px}.concept-visual{font-size:10px;gap:9px}.lab-layout{display:flex;flex-direction:column}.lab-exercises{order:1;grid-template-columns:1fr 1fr}.lab-exercise{padding:12px 10px}.lab-exercise:last-child{grid-column:1/-1}.lab-main{order:3;padding:22px 15px}.lab-main .section-heading{margin-bottom:18px}.lab-main .section-heading h2{font-size:18px}.lab-main .pill{display:inline-flex}.lab-main .calculator{max-width:326px;padding:16px 20px 24px}.lab-main .calc-key{height:34px;font-size:13px}.lab-main .calc-key.number{font-size:21px}.lab-main .key-row{gap:7px;margin-bottom:4px}.lab-main .key-alt{font-size:8px}.lab-main .dpad{width:88px;height:65px}.lab-main .calc-brand>strong{font-size:21px}.lab-main .lcd input{font-size:18px}.lab-guide{order:2;padding:20px}.lab-guide h3{font-size:14px}.lab-guide p{font-size:12px}.help-details{order:4;margin-top:0}.practice-setup{padding:25px 20px}.practice-picker{grid-template-columns:1fr;gap:25px}.setup-intro h2{font-size:22px}.setup-footer{flex-direction:column}.practice-question{padding:24px 20px}.question-prompt{font-size:21px}.answer-actions{gap:15px}.answer-actions .primary{font-size:11px}.answer-form>small{font-size:9px}.session-summary,.exam-intro{padding:30px 23px}.exam-intro h2{font-size:28px}.exam-intro>p{font-size:12px}.exam-facts strong{font-size:27px}.exam-facts span{font-size:10px}.check-list{font-size:11px;line-height:1.8}.check-list li{margin:12px 0}.page-heading>.secondary{font-size:0;padding:10px}.page-heading>.secondary::after{content:'Export ↓';font-size:10px}.progress-panel{padding:22px 18px}.progress-panel .section-heading{flex-wrap:wrap}.progress-panel .section-heading>span{font-size:9px}.skill-row{gap:10px;font-size:11px}.skill-row .progress-track{width:45px}.skill-label{width:65px;font-size:9px}.skill-row>.icon{display:none}.history-row{flex-wrap:wrap;gap:8px}.history-row span:first-child{font-size:11px}.history-row span:last-child{width:100%}.results-header{padding:22px;gap:20px}.results-header>strong{font-size:35px}.results-header>div{flex:1}.results-header h2{font-size:17px}.results-list summary{padding:16px;font-size:12px}.results-list details>div{padding:0 18px 18px}.timer{font-size:18px;padding:8px}.exam-controls{gap:15px}dialog{padding:28px 22px}dialog h2{font-size:23px}.formula-grid>div{padding:11px}.formula-grid strong{font-size:10px}.formula-grid span{font-size:13px}footer{padding:20px;font-size:9px}footer span{font-size:8px}}
.icon-button.mobile-menu{display:none}
.mobile-nav-close{display:none}
/* Keep instructional text legible; decorative labels remain visually secondary. */
.path-copy p,.lesson-card p,.key-guide p,.lab-lessons>p,.worked-steps li,.muted-text{color:#687460}
.lesson-status,.chapter-count,.library-tools>span,.stat-card div>span,.skill-label{color:#727d66}
.overline,.page-eyebrow{color:#758269}
@media(max-width:760px){.icon-button.mobile-menu{display:grid}.sidebar{visibility:hidden}.nav-open .sidebar{visibility:visible}.mobile-nav-close{display:block;position:absolute;right:5px;top:5px;font-size:24px;width:32px;height:32px}}
@media(max-width:560px){.lesson-layout .calc-key,.practice-layout .calc-key,.lab-main .calc-key{height:42px}.lesson-layout .dpad,.practice-layout .dpad,.lab-main .dpad{height:76px}.hero-art{opacity:.6}.calc-key.number{font-size:22px}.stat-card .stat-icon{display:none}.stat-card{min-height:100px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}