:root{--blue:#2454ed;--blue-deep:#183bab;--navy:#111c35;--ink:#18233c;--muted:#647086;--line:#e5e9f1;--bg:#f5f7fc;--lime:#bcf78b;--teal:#128273;--red:#b52b3e;--radius:20px;--shadow:0 5px 30px #142d6610;font-family:'Segoe UI',system-ui,sans-serif;color:var(--ink);font-size:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg)}a{color:var(--blue);text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,summary{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a:hover{text-decoration:none}p{line-height:1.7}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{line-height:1.2;letter-spacing:-.035em}h1{font-size:2.5rem}h2{font-size:1.75rem}h3{font-size:1.15rem}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #6495ff;outline-offset:4px}input:focus,select:focus,textarea:focus{outline:3px solid #2454ed25;border-color:var(--blue)}[hidden]{display:none!important}.brand{display:inline-flex;align-items:center;gap:11px;color:var(--navy);font-size:2.1rem;font-weight:800;letter-spacing:-.09em;line-height:1}.brand-light{color:white}.brand-dot{color:var(--lime)}.eyebrow{font-size:.75rem;letter-spacing:.14em;font-weight:750;color:var(--muted)}.eyebrow.light{color:#cfdbff}.muted{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;border:1px solid transparent;border-radius:10px;padding:12px 22px;font-weight:650;font-size:.94rem;transition:background .15s,transform .15s;color:var(--ink);background:#fff}.btn:hover{transform:translateY(-1px);background:#eff2fc}.btn.primary{background:var(--blue);color:white;box-shadow:0 4px 12px #2454ed20}.btn.primary:hover{background:#1941cf}.btn.lime{background:var(--lime);color:var(--navy)}.btn.wide{width:100%}.btn:disabled{cursor:wait;opacity:.6;transform:none}.btn.ghost{background:transparent;border-color:var(--line)}.btn.small{min-height:38px;padding:8px 14px;font-size:.875rem}.field-help{font-size:.8125rem;color:var(--muted);line-height:1.6;margin:10px 0 24px}.alert{padding:14px 18px;border-radius:10px;font-size:.9rem;line-height:1.6;margin-bottom:18px}.alert.error{background:#fff0f1;color:#9c263d;border:1px solid #f3cdd3}.badge{display:inline-flex;align-items:center;gap:8px;font-size:.7rem;letter-spacing:.07em;font-weight:700;background:#edf6f2;color:#237360;padding:8px 12px;border-radius:30px}.status-dot{width:6px;height:6px;background:currentColor;border-radius:50%}.login-layout{display:grid;grid-template-columns:1.03fr 1fr;min-height:100vh}.login-story{background:#1945d3;color:#fff;padding:46px 9%;display:flex;flex-direction:column;position:relative;overflow:hidden}.login-story-content{margin:auto 0;padding:64px 0 38px;max-width:530px}.login-story h1{font-size:clamp(3.6rem,5.9vw,6rem);font-weight:650;letter-spacing:-.075em;line-height:1.02;margin:25px 0}.login-story h1 em{font-style:normal;color:var(--lime)}.login-story-content>p{font-size:1.1rem;color:#d6e0ff;line-height:1.65}.curve-illustration{margin-top:40px;max-width:475px}.curve-label,.curve-bottom{display:flex;align-items:center;justify-content:space-between;font-size:.75rem;color:#d6e0ff;gap:12px}.curve-illustration svg{width:100%;height:auto;margin-top:20px;overflow:visible}.tiny-pill{font-size:.7rem;border:1px solid #ffffff35;border-radius:30px;padding:6px 12px;white-space:nowrap}.curve-bottom{font-size:.7rem;letter-spacing:.05em}.login-footnote{font-size:.625rem;letter-spacing:.08em;color:#c4d2ff;display:flex;justify-content:space-between;gap:16px;margin:0}.login-form-side{background:#fff;display:flex;align-items:center;justify-content:center;position:relative;padding:75px 12%}.login-form-wrap{max-width:390px;width:100%}.login-form-wrap h2{font-size:2.15rem;letter-spacing:-.05em;margin:24px 0 12px}.intro{font-size:1rem;margin-bottom:34px}.login-form label{display:block;font-size:.875rem;font-weight:650;margin-bottom:10px}input[type=text],input[type=password],input[type=number],select,textarea{width:100%;border:1px solid #d8dfea;border-radius:10px;background:#fff;padding:14px 15px;color:var(--ink);min-height:48px}input::placeholder{color:#9099ab}.demo-note{background:#f6f8fd;border:1px solid var(--line);padding:16px 18px;border-radius:12px;margin-top:24px;font-size:.84rem}.demo-note p{margin:4px 0 0;color:var(--muted);line-height:1.6}.login-reassurance{display:flex;gap:13px;margin-top:35px;font-size:.825rem}.login-reassurance p{color:var(--muted);font-size:.8rem;margin:5px 0;line-height:1.65}.mini-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#e9f7f1;color:#237360;flex-shrink:0}.teacher-link{display:block;color:var(--muted);font-size:.8rem;margin-top:32px;text-align:center}.teacher-link:hover{color:var(--blue)}.login-bottom{position:absolute;bottom:20px;font-size:.75rem;color:#929aac;margin:0}.preview-main{max-width:1120px;margin:auto;padding:40px}.preview-main h1{margin-top:50px}.hero{background:#2454ed;color:#fff;border-radius:var(--radius);padding:40px;position:relative;overflow:hidden}.hero h2{font-size:2.5rem;margin:16px 0}.hero p{max-width:430px;color:#dce5ff}.hero .btn{margin-top:10px}
@media(max-width:850px){.login-story{padding:32px 8%}.login-form-side{padding:60px 9%}.login-footnote span{display:none}.login-story h1{font-size:4.2rem}.login-form-wrap h2{font-size:1.75rem}}
@media(max-width:620px){.login-layout{display:block}.login-story{padding:24px}.login-story-content{padding:32px 0 8px}.login-story h1{font-size:3.1rem;margin:14px 0}.login-story h1 br{display:none}.login-story-content>p{font-size:.94rem;margin-bottom:10px}.login-story-content>p br{display:none}.curve-illustration,.login-footnote{display:none}.login-form-side{padding:40px 24px 68px}.login-form-wrap{max-width:none}.login-reassurance{margin-top:25px}.intro br{display:none}.login-form-wrap h2{font-size:1.9rem}.login-bottom{bottom:20px}.login-form-wrap>.badge{display:none}.login-form-wrap h2{margin-top:0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.icon{width:20px;height:20px;display:inline-block;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle;flex-shrink:0}.blue-text{color:var(--blue)}.teal-text{color:var(--teal)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:99;top:-60px;left:20px;background:#fff;padding:12px}.skip-link:focus{top:10px}.sidebar{position:fixed;top:0;bottom:0;width:244px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:34px 22px 0;z-index:40;overflow:auto}.brand-subtitle{font-size:.68rem;color:#8490a7;margin:15px 0 32px;letter-spacing:-.02em}.nav-heading{font-size:.64rem;color:#929aad;letter-spacing:.12em;font-weight:700;margin:0 14px 12px}.resources-heading{margin-top:32px}.nav-item{display:flex;align-items:center;gap:13px;padding:13px 14px;margin-bottom:5px;color:#68758f;border-radius:9px;font-size:.875rem;font-weight:550;white-space:nowrap}.nav-item.active{background:#edf2ff;color:var(--blue);font-weight:700}.nav-item:hover{background:#f4f6fb;color:var(--blue)}.nav-item .icon{width:19px;height:19px}.sidebar-bottom{margin-top:auto;padding-top:35px}.sidebar-note{background:#f5f7fc;border:1px solid #e9edf5;border-radius:13px;padding:20px 16px}.sidebar-note>.icon{color:var(--blue);display:block;margin-bottom:13px;width:24px;height:24px}.sidebar-note strong{font-size:.86rem;line-height:1.6;display:block;letter-spacing:-.02em}.sidebar-note p{font-size:.71rem;line-height:1.7;color:#8590a5;margin:8px 0 0}.sidebar-profile{display:flex;align-items:center;gap:10px;padding:22px 0}.avatar{width:35px;height:35px;border-radius:11px;background:#e9eefe;color:var(--blue);display:grid;place-items:center;font-size:.9rem;font-weight:750;flex-shrink:0}.sidebar-profile>div{min-width:0;flex:1}.sidebar-profile strong{display:block;font-size:.8rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:115px}.sidebar-profile>div>span{display:block;font-size:.67rem;color:#929aad;margin-top:3px}.icon-button{display:grid;place-items:center;width:35px;height:35px;border:0;border-radius:8px;background:transparent;color:#8793a9}.icon-button:hover{background:#f0f3fc;color:var(--blue)}.app-shell{margin-left:244px;min-height:100vh;display:flex;flex-direction:column}.topbar{height:78px;padding:0 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#ffffffb3;gap:18px}.topbar-left{display:flex;align-items:center;gap:12px}.topbar-title{font-size:.8rem;color:#8790a2;display:flex;align-items:center;gap:15px}.topbar-title a{color:#55637f}.crumb-separator{color:#b5bece}.course-tag{border:1px solid var(--line);background:#fff;border-radius:30px;padding:8px 13px;font-size:.69rem;color:#6f7a90;white-space:nowrap}.course-tag-dot{display:inline-block;width:6px;height:6px;border-radius:2px;background:var(--blue);margin-right:7px;vertical-align:middle}.tag-separator{color:#c9d0dd;margin:0 7px}.main-content{padding:38px 40px 54px;width:100%;max-width:1560px;margin:0 auto;flex:1}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}.page-heading h1{font-size:2.12rem;margin:10px 0 10px;letter-spacing:-.055em;font-weight:700}.page-heading>div>p{color:#8790a3;font-size:.88rem;margin:0}.page-heading>.soft-tag{font-size:.75rem;color:#8390a8;gap:8px;display:flex;align-items:center}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:26px}.dashboard-primary{min-width:0}.dashboard-hero{padding:30px 30px 29px;min-height:305px;display:flex;align-items:center;justify-content:space-between;background:#2454ed;box-shadow:0 7px 24px #2454ed1a}.hero-copy{position:relative;z-index:1;flex:1;min-width:290px}.hero-chip{display:inline-flex;align-items:center;gap:6px;font-size:.6rem;letter-spacing:.12em;color:#d9e4ff;border:1px solid #ffffff30;background:#ffffff0b;border-radius:30px;padding:7px 11px}.hero-chip .icon{width:13px;height:13px}.dashboard-hero h2{font-size:2.02rem;letter-spacing:-.045em;line-height:1.15;margin:17px 0 16px;font-weight:650}.dashboard-hero h2 em{font-style:normal;color:var(--lime)}.dashboard-hero p{font-size:.85rem;line-height:1.6;margin-bottom:14px;color:#fff;max-width:355px}.dashboard-hero p span{font-size:.75rem;color:#c2d2ff}.dashboard-hero .btn{font-size:.78rem;min-height:42px;padding:10px 17px}.hero-duration{display:block;color:#c8d7ff;font-size:.65rem;margin-top:13px}.hero-duration .icon{width:13px;height:13px;margin-right:4px}.hero-chart{width:240px;position:relative;margin:15px 0 0 8px;flex-shrink:0}.chart-eyebrow{font-size:.5rem;letter-spacing:.12em;color:#bdceff;text-align:center}.hero-chart svg{width:100%;height:auto}.chart-float{position:absolute;right:2px;top:76px;background:#fff;border:1px solid #ffffff60;box-shadow:0 8px 24px #10297140;border-radius:11px;padding:10px 12px;display:flex;gap:9px;align-items:center;transform:rotate(-5deg)}.chart-float>.icon{width:24px;height:24px;background:#ecf7e5;border-radius:50%;padding:4px;color:#469354}.chart-float>span{font-size:.6rem;line-height:1.5;color:#6a758e}.chart-float strong{color:#243750;font-weight:650}.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0 32px}.mini-stats>div{display:flex;gap:12px;align-items:center;padding:17px 15px;background:white;border:1px solid var(--line);border-radius:12px}.stat-icon,.chapter-icon{width:39px;height:39px;display:grid;place-items:center;border-radius:11px;flex-shrink:0}.blue{background:#edf2ff;color:#315ce8}.cyan{background:#e8f7fc;color:#2891ba}.teal{background:#eaf8f2;color:#258273}.orange{background:#fff3e8;color:#cb8738}.purple{background:#f1edff;color:#8a65c4}.mini-stats>div>div>strong{font-size:1.5rem;font-weight:700;display:block;line-height:1.2;letter-spacing:-.04em}.mini-stats strong small{font-size:.8rem;color:#a5aebf;font-weight:500}.mini-stats>div>div>span{font-size:.59rem;color:#929bae;display:block;margin-top:5px;white-space:nowrap}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px}.section-heading h2{font-size:1.2rem;margin:0;font-weight:700;letter-spacing:-.035em}.section-heading h3{font-size:.94rem;margin:0;letter-spacing:-.025em}.section-heading p{font-size:.76rem;color:#929aad;margin:6px 0 0}.text-link{font-size:.77rem;font-weight:650;color:var(--blue)}.text-link:hover{text-decoration:underline}.chapter-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.chapter-card{display:block;padding:22px;border:1px solid var(--line);border-radius:15px;background:#fff;transition:transform .17s,border-color .17s,box-shadow .17s;color:var(--ink)}.chapter-card:hover{border-color:#bdcef7;box-shadow:var(--shadow);transform:translateY(-3px)}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:21px}.chapter-icon{width:43px;height:43px;border-radius:12px}.chapter-card .eyebrow{font-size:.57rem;letter-spacing:.11em;color:#929aad}.chapter-card h3{font-size:1.04rem;margin:8px 0;font-weight:700}.chapter-card p{font-size:.72rem;line-height:1.6;color:#98a0b0;margin:0 0 22px;min-height:23px}.chapter-card-bottom{display:flex;justify-content:space-between;font-size:.64rem;color:#9aa4b7;margin-bottom:8px}.progress-track{height:5px;background:#edf0f6;border-radius:8px;overflow:hidden}.progress-track>span{display:block;height:100%;border-radius:inherit;background:var(--blue)}.pill{font-size:.61rem;padding:6px 9px;border-radius:30px;display:inline-flex;gap:4px;align-items:center;white-space:nowrap;line-height:1.3;font-weight:550}.pill .icon{width:11px;height:11px}.pill.green{color:#28836b;background:#eaf7ef}.pill.neutral{background:#f4f6fa;color:#97a0b2}.chapter-locked .chapter-icon{opacity:.62}.chapter-locked h3{color:#69758b}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}.dashboard-aside{display:flex;flex-direction:column;gap:22px}.compact{margin-bottom:14px}.compact>.icon{color:#a0aabe;width:17px;height:17px}.progress-panel{padding:23px 22px}.progress-ring{--value:0;width:154px;height:154px;margin:22px auto;background:conic-gradient(var(--blue) calc(var(--value)*1%),#eff2f8 0);border-radius:50%;padding:9px;transform:rotate(-90deg)}.progress-ring>div{background:#fff;border-radius:50%;height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;transform:rotate(90deg)}.progress-ring strong{font-size:2.3rem;letter-spacing:-.06em;line-height:1.2}.progress-ring strong small{font-size:1.1rem;letter-spacing:-.02em;margin-left:1px}.progress-ring span{font-size:.56rem;color:#99a3b5;margin-top:4px}.progress-panel-copy{text-align:center;margin-bottom:18px}.progress-panel-copy strong{font-size:.77rem}.progress-panel-copy p{font-size:.7rem;color:#98a1b3;line-height:1.7;margin:7px 0 0}.progress-panel .btn{font-size:.7rem;border-color:#e5eaf4;min-height:36px}.activity-panel{padding:22px}.activity-panel .pill{font-size:.55rem}.activity-chart{display:flex;justify-content:space-between;gap:8px;padding:8px 0 0}.activity-day{display:flex;flex-direction:column;align-items:center;flex:1;font-size:.64rem;color:#a1aabb;gap:8px}.activity-bar-slot{height:65px;width:100%;display:flex;align-items:flex-end;justify-content:center}.activity-bar{background:#baccff;border-radius:5px 5px 3px 3px;min-height:5px;width:16px;max-width:100%}.activity-day.today .activity-bar{background:var(--blue)}.activity-day.today>span:last-child{color:var(--blue);font-weight:700}.activity-bar.empty{background:#edf1f7!important}.activity-count{font-size:.57rem}.activity-panel>p{font-size:.66rem;color:#97a1b3;line-height:1.65;margin:17px 0 0}.tip-card{border-radius:15px;padding:23px;background:#eef1ff;border:1px solid #e3e8fe}.tip-icon{display:block;color:#6480db;margin-bottom:18px}.tip-icon .icon{width:24px;height:24px}.tip-card .eyebrow{font-size:.54rem;color:#8a9ac8}.tip-card h3{font-size:1.1rem;line-height:1.35;margin:9px 0;color:#39518b;font-weight:650}.tip-card p{font-size:.73rem;line-height:1.8;color:#8090b5;margin:0 0 17px}.tip-card a{font-size:.7rem;color:#5270b7;font-weight:650}.app-footer{display:flex;justify-content:space-between;gap:16px;padding:22px 40px;color:#a0a9ba;font-size:.65rem;border-top:1px solid var(--line)}.app-footer>span:first-child{font-weight:750;color:#6b7891}.app-footer>span:first-child>span{font-weight:400;margin-left:12px;color:#a0a9ba}.mobile-only{display:none}.alert.info{background:#edf3ff;color:#34578d;border:1px solid #d8e5ff}.noscript{position:fixed;bottom:0;left:0;right:0;background:#fff3d2;padding:12px;text-align:center;z-index:100;font-size:.9rem}.course-progress{min-width:180px}.course-progress>strong{font-size:1.4rem;display:block}.course-progress>span{display:block;color:var(--muted);font-size:.75rem;margin:4px 0 10px}.pathway-banner{display:flex;gap:14px;align-items:center;border:1px solid #dfe7ff;background:#edf2ff;padding:16px 20px;border-radius:12px;color:#5f77af;margin-bottom:35px}.pathway-banner p{margin:0;font-size:.84rem;line-height:1.65}.pathway-chapter{display:flex;gap:24px;scroll-margin-top:20px}.chapter-rail{width:45px;flex-shrink:0;position:relative;display:flex;justify-content:center}.chapter-rail:after{content:'';position:absolute;top:44px;bottom:0;width:2px;background:#e2e8f2}.pathway-chapter:last-child .chapter-rail:after{display:none}.chapter-number{width:43px;height:43px;background:#edf0f6;border:1px solid #dce3ef;color:#a5afc0;border-radius:13px;display:grid;place-items:center;font-size:.9rem;font-weight:700;position:relative;z-index:1}.chapter-number.current{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 3px 12px #2454ed28}.chapter-number.done{background:#e2f4eb;color:var(--teal);border-color:#cae9dc}.pathway-chapter-content{flex:1;min-width:0;padding-bottom:32px}.pathway-chapter-content>header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.pathway-chapter-content>header .eyebrow{font-size:.63rem}.pathway-chapter-content h2{font-size:1.4rem;margin:7px 0}.pathway-chapter-content>header p{font-size:.83rem;color:var(--muted);margin:0}.skill-list{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}.skill-row{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--line)}.skill-row:last-child{border:0}.skill-status-icon{background:#edf2ff;color:var(--blue);width:36px;height:36px;border-radius:11px;display:grid;place-items:center;flex-shrink:0}.skill-row.locked .skill-status-icon{background:#f2f4f8;color:#a5adbb}.skill-row.mastered .skill-status-icon{background:#e9f7f0;color:var(--teal)}.skill-row-body{flex:1;min-width:0}.skill-row h3{font-size:.91rem;margin:0 0 5px;letter-spacing:-.02em}.skill-row p{font-size:.76rem;color:#8a95a8;line-height:1.5;margin:0}.skill-row.locked h3{color:#8894a9}.skill-duration{color:#98a3b6;font-size:.7rem;white-space:nowrap}.skill-row .btn{font-size:.76rem;min-width:88px}.lesson-heading{max-width:850px;margin-bottom:32px}.lesson-heading>.eyebrow{font-size:.68rem}.lesson-heading h1{font-size:2.5rem;margin:14px 0;max-width:850px}.lesson-heading>p{color:var(--muted);font-size:1.05rem;margin-bottom:18px}.lesson-meta{display:flex;gap:22px;color:#8c97aa;font-size:.76rem;align-items:center;flex-wrap:wrap}.lesson-meta>span{display:inline-flex;align-items:center;gap:7px}.lesson-meta .icon{width:16px;height:16px}.lesson-grid{display:grid;grid-template-columns:minmax(0,790px) 225px;gap:44px}.lesson-content{min-width:0}.story-card{border-radius:17px;background:var(--blue);color:#fff;padding:30px}.story-card>.eyebrow{font-size:.65rem;color:#c6d5ff}.story-card>p{font-size:1.2rem;line-height:1.7;letter-spacing:-.02em;margin:17px 0 20px}.story-caption{color:#bcccf9;font-size:.67rem}.lesson-section{padding:38px 0 26px;scroll-margin-top:20px}.lesson-section>.eyebrow{font-size:.65rem;color:#95a2b9}.lesson-section h2{font-size:1.6rem;margin:12px 0 18px}.lesson-section .lead{font-size:1.03rem;line-height:1.8;color:#4f5e79}.idea-points{padding:0;list-style:none;margin:22px 0 4px}.idea-points li{display:flex;gap:13px;margin:15px 0;line-height:1.75;color:#65728a;font-size:.95rem}.idea-points .icon{margin-top:4px;background:#e6f5ee;color:#2a9476;border-radius:50%;padding:3px;width:23px;height:23px}.formula-card{padding:25px 28px;border:1px solid #dfe7fb;background:#edf2ff;border-radius:14px;scroll-margin-top:20px}.formula-card>.eyebrow{font-size:.61rem;color:#6980b7}.formula{font-family:Georgia,'Times New Roman',serif;font-size:1.4rem;color:#2b4992;line-height:1.6;margin:18px 0;overflow-wrap:anywhere}.formula-card>p{color:#7788af;line-height:1.8;font-size:.83rem;margin:0}.worked-steps{list-style:none;padding:0;margin:23px 0}.worked-steps li{display:flex;gap:15px;margin:15px 0}.worked-steps li>span{display:grid;place-items:center;width:30px;height:30px;flex-shrink:0;border-radius:50%;background:#eaf0ff;color:var(--blue);font-size:.82rem;font-weight:700}.worked-steps p{font-size:.94rem;color:#60708b;line-height:1.7;margin:0}.example-result{display:flex;gap:12px;align-items:center;padding:18px 20px;background:#eaf7ef;border-radius:12px;color:#2c8167;font-size:.92rem;line-height:1.6}.pitfall-card{display:flex;gap:16px;padding:24px;border:1px solid #f1dfc2;background:#fff8ec;border-radius:14px;margin:10px 0 25px;color:#a27632}.pitfall-card>.icon{margin-top:2px;width:23px;height:23px}.pitfall-card h3{font-size:.94rem;margin:0 0 7px}.pitfall-card p{font-size:.86rem;line-height:1.8;margin:0;color:#927952}.lab-invitation{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:13px;padding:20px;margin:24px 0;color:var(--blue)}.lab-invitation>span:nth-child(2){flex:1;display:flex;flex-direction:column;gap:5px}.lab-invitation strong{font-size:.9rem}.lab-invitation>span>span{font-size:.77rem;color:#8c98af}.jamovi-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:20px;margin:24px 0}.jamovi-card summary{cursor:pointer;color:#60718d;font-weight:650;font-size:.91rem;display:flex;align-items:center;gap:12px}.jamovi-card ol{padding-left:22px;color:#74829b;font-size:.9rem;line-height:1.8;margin-bottom:0}.jamovi-card .field-help{margin-bottom:0}.recap-card{padding:26px;background:#fff;border-left:4px solid var(--blue);border-radius:0 12px 12px 0;margin:30px 0}.recap-card>.eyebrow{font-size:.63rem}.recap-card p{font-size:1.1rem;line-height:1.7;margin:12px 0 0;color:#425578}.lesson-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0}.lesson-cta h2{font-size:1.5rem;margin-bottom:8px}.lesson-cta p{font-size:.85rem;color:var(--muted);margin:0}.lesson-cta .btn{font-size:.83rem}.source-note{font-size:.72rem;color:#939fb3;line-height:1.7;margin:20px 0}.sticky-side{position:sticky;top:30px}.sticky-side>.eyebrow{font-size:.64rem}.lesson-toc{display:flex;flex-direction:column;gap:2px;margin:16px 0 30px}.lesson-toc a{display:flex;gap:14px;font-size:.86rem;color:#72819b;padding:12px 0}.lesson-toc a span{font-size:.7rem;color:#acb6c8;align-self:center}.lesson-toc a:hover{color:var(--blue)}.lesson-side-note{border-top:1px solid var(--line);padding:26px 0}.lesson-side-note>.icon{color:#6d8fdc;width:25px;height:25px;margin-bottom:15px}.lesson-side-note h3{font-size:.98rem;line-height:1.5;color:#53688e;font-weight:600;margin-bottom:10px}.lesson-side-note p{font-size:.79rem;line-height:1.8;color:#93a0b5;margin:0}.empty-state{text-align:center;max-width:750px;margin:70px auto;padding:45px}.empty-icon{display:grid;place-items:center;width:70px;height:70px;border-radius:50%;background:#e9efff;color:var(--blue);margin:0 auto 25px}.empty-state .eyebrow{display:block}.empty-state h1{margin-top:18px}.empty-state>p{color:var(--muted)}.prerequisites{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:24px 0}.practice-layout{max-width:840px;margin:0 auto}.practice-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 25px}.practice-layout>h1{font-size:2.1rem;margin-bottom:12px}.practice-layout>.muted{font-size:.92rem}.mastery-strip{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:18px 22px;margin:25px 0 20px;border:1px solid var(--line);border-radius:13px;background:#fff}.mastery-strip strong{font-size:.83rem}.mastery-strip p{font-size:.73rem;color:#98a3b8;margin:5px 0 0}.mastery-dots{display:flex;gap:8px;flex-shrink:0}.mastery-dots span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:#eff2f9;color:#d4ddeb}.mastery-dots span.filled{background:#ddf2e6;color:#258669}.mastery-dots .icon{width:17px;height:17px}.exercise-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:0 6px 24px #18285306}.exercise-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:27px}.exercise-top>.eyebrow{color:var(--blue);font-size:.63rem}.exercise-loading{padding:60px 20px;text-align:center;color:#929eb5}.exercise-card fieldset{border:0;padding:0;margin:0;min-width:0}.exercise-card legend{font-size:1.28rem;line-height:1.55;font-weight:650;letter-spacing:-.025em;margin-bottom:25px;width:100%;padding:0}.choice-label{display:flex;gap:13px;align-items:center;position:relative;padding:17px 18px;border:1px solid #e0e6f0;border-radius:12px;margin-bottom:12px;cursor:pointer;line-height:1.55;font-size:.92rem;color:#66748e;transition:background .12s,border-color .12s}.choice-label:hover{border-color:#b1c3f4;background:#f9fbff}.choice-label:has(input:checked){border-color:var(--blue);background:#edf2ff;color:#2d4f9c;box-shadow:0 0 0 1px var(--blue)}.choice-label input{accent-color:var(--blue);width:18px;height:18px;flex-shrink:0;margin:0}.choice-label:focus-within{outline:2px solid #7596f1;outline-offset:2px}.choice-letter{width:25px;height:25px;display:grid;place-items:center;border-radius:6px;background:#f0f3f9;font-size:.72rem;color:#98a4b9;font-weight:650;flex-shrink:0}#number-answer label{display:block;font-size:.87rem;font-weight:600;margin-bottom:12px}#numeric-answer{max-width:280px;font-size:1.2rem}#number-answer .field-help{margin-bottom:0}.exercise-actions{display:flex;justify-content:space-between;gap:15px;margin-top:30px;align-items:center}.exercise-actions .btn{font-size:.83rem}.hint-box{background:#fff8e9;border:1px solid #efdfbf;color:#967642;padding:18px;border-radius:12px;font-size:.89rem;line-height:1.7;margin-top:23px}.feedback{padding-top:25px;margin-top:25px;border-top:1px solid var(--line);outline:none}.feedback-symbol{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-size:1.25rem;margin-bottom:15px;background:#e7f6ed;color:#278562}.feedback.incorrect .feedback-symbol{background:#fff3e4;color:#b17b29}.feedback h2{font-size:1.55rem;margin:0 0 12px}.feedback>p{font-size:.94rem;color:#66758f;line-height:1.7}.feedback ol{padding-left:23px;font-size:.9rem;color:#72819a;line-height:1.9}.feedback ol li{padding-left:4px;margin:6px 0}#feedback-note{font-size:.8rem;color:#92a0b5}.feedback-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.feedback-actions .btn{font-size:.82rem}.unlock-message{background:#edf7f0;padding:16px 20px;border-radius:12px;font-size:.86rem;color:#267a61;line-height:1.7}.practice-footnote{display:flex;gap:8px;justify-content:center;align-items:center;margin-top:22px;color:#a1abbb;font-size:.73rem;line-height:1.6}.practice-footnote .icon{width:14px;height:14px}.table-wrap{overflow-x:auto;margin:14px 0}table{width:100%;border-collapse:collapse;font-size:.86rem}th{text-align:left;background:#f6f8fc;font-weight:600;color:#8290a6;padding:12px 15px}td{padding:14px 15px;border-bottom:1px solid var(--line);color:#68778f}tr:last-child td{border-bottom:0}.progress-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:28px}.progress-stats .eyebrow{font-size:.65rem}.progress-stats strong{display:block;font-size:2.5rem;margin:16px 0 5px;letter-spacing:-.05em}.progress-stats strong small{font-size:1.2rem;color:#a8b1c1;font-weight:500}.progress-stats p{font-size:.8rem;color:#96a0b4;margin:0}.progress-columns{display:grid;grid-template-columns:1fr 1.15fr;gap:24px}.progress-columns>.panel{min-width:0}.chapter-progress-row{margin:24px 0}.chapter-progress-row>div:first-child{display:flex;align-items:center;gap:10px;margin-bottom:11px}.chapter-progress-row>div>span{font-size:.68rem;color:#9ca9c0}.chapter-progress-row strong{font-size:.83rem;font-weight:550;flex:1}.chapter-progress-row small{font-size:.73rem;color:#97a2b6}.history-item{border-bottom:1px solid var(--line);padding:14px 0}.history-item:last-child{border:0}.history-item summary{list-style:none;display:flex;gap:11px;align-items:center;cursor:pointer}.history-item summary::-webkit-details-marker{display:none}.history-status{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;flex-shrink:0}.history-status .icon{width:16px;height:16px}.history-status.correct{background:#e7f6ee;color:#278569}.history-status.incorrect{background:#fff5e7;color:#b48b41}.history-item summary>div{flex:1;min-width:0}.history-item summary strong{display:block;font-size:.79rem;line-height:1.4}.history-item summary>div>span{font-size:.68rem;display:block;color:#a1aabc;margin-top:5px}.history-item summary>.icon{width:14px;height:14px;color:#a5afc0}.history-item[open] summary>.icon{transform:rotate(90deg)}.history-detail{background:#f6f8fc;border-radius:9px;padding:16px;margin-top:15px;font-size:.79rem;color:#7c8ca8;line-height:1.8}.history-detail p{margin-bottom:10px}.history-detail ol{padding-left:18px}.quiet-empty{text-align:center;padding:32px 12px;color:#9aa5b8}.quiet-empty>.icon{width:32px;height:32px;margin-bottom:15px;color:#abbcde}.quiet-empty h3{font-size:1.08rem;color:#677b9c;line-height:1.5}.quiet-empty p{font-size:.84rem;line-height:1.8;max-width:420px;margin:0 auto 20px}.review-focus{display:flex;align-items:center;gap:20px;margin-bottom:24px}.review-focus h2{font-size:1.15rem;margin:0 0 8px}.review-focus p{color:#8c98ac;font-size:.83rem;margin:0}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px}.review-card h3{margin:20px 0 12px;font-size:1.12rem;line-height:1.35}.review-card p{font-size:.86rem;color:#94a0b3;margin-bottom:24px}.review-empty{grid-column:1/-1;padding:40px}.search-field{position:relative;margin-bottom:32px;max-width:600px}.search-field>.icon{position:absolute;left:15px;top:15px;color:#a6b1c2}.search-field input{width:100%;min-height:50px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:13px 16px 13px 45px;font:inherit;color:var(--ink)}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.resource-card{display:flex;gap:15px;padding:21px 17px;background:#fff;border:1px solid var(--line);border-radius:13px;color:var(--ink)}.resource-card:hover{border-color:#b6c8f5;box-shadow:var(--shadow)}.resource-icon{display:grid;place-items:center;flex-shrink:0;width:38px;height:45px;background:#edf2fe;color:#7894d2;border-radius:8px}.resource-card .eyebrow{font-size:.54rem;color:#a2adc0}.resource-card h3{font-size:.87rem;line-height:1.4;margin:8px 0 10px}.resource-card>div>span:last-child{font-size:.65rem;color:#a1aabc}.library-heading{margin-top:45px}.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.glossary-card{padding:23px;background:white;border:1px solid var(--line);border-radius:13px}.glossary-card>.eyebrow{font-size:.56rem;color:#9ba8c0}.glossary-card h3{font-size:.98rem;line-height:1.4;margin:14px 0}.glossary-card p{font-size:.83rem;line-height:1.8;color:#8b98ae;margin:0}.lab-panel{margin-bottom:28px;padding:30px;scroll-margin-top:20px}.lab-panel .eyebrow{font-size:.64rem;display:block;margin-bottom:10px}.lab-panel h2{font-size:1.5rem}.lab-panel>p{font-size:.94rem;max-width:800px;color:#8a97ad}.lab-grid{display:grid;grid-template-columns:1fr 200px;gap:28px;align-items:center;margin:30px 0}.lab-svg{width:100%;display:block;overflow:visible}.lab-readout{padding:25px;border:1px solid var(--line);border-radius:13px;background:#f8faff}.lab-readout>span{font-size:.59rem;letter-spacing:.06em;color:#8394b5}.lab-readout>strong{display:block;font-size:1.8rem;letter-spacing:-.04em;color:var(--blue);margin:9px 0 24px}.lab-readout p{font-size:.78rem;line-height:1.7;color:#8e9cb4;margin-bottom:0}.range-label{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:.8rem;color:#7f8da5;margin:15px 0}.range-label output{font-weight:700;color:var(--blue);white-space:nowrap}input[type=range]{width:100%;accent-color:var(--blue);cursor:pointer;min-height:30px}.range-endpoints{display:flex;justify-content:space-between;font-size:.65rem;color:#a3acc0}.lab-locked{display:flex;align-items:center;gap:18px;flex-wrap:wrap;background:#f6f8fc;border:1px dashed #dfe6f2;border-radius:12px;padding:25px;color:#94a2b9}.lab-locked>p{flex:1;min-width:200px;margin:0;font-size:.9rem}.teacher-login{min-height:100vh;display:grid;place-items:center;padding:35px 22px}.teacher-login-card{width:100%;max-width:480px;padding:40px}.teacher-login-card>.eyebrow{display:block;margin:35px 0 12px;font-size:.65rem}.teacher-login-card h1{font-size:2rem}.teacher-login-card>.muted{font-size:.9rem}.stack-form{display:flex;flex-direction:column;gap:12px}.stack-form label{font-size:.85rem;font-weight:600;margin-top:8px}.stack-form .field-help{margin:0 0 10px}.stack-form .btn{margin-top:8px}.teacher-layout{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:25px;align-items:start}.teacher-layout>.panel{min-width:0}.teacher-layout>aside>.stat-icon{margin-bottom:22px}.teacher-layout>aside>h2{font-size:1.3rem}.students-table{font-size:.82rem}.students-table td:first-child>span{display:block;color:#99a6bb;font-size:.7rem;margin-top:5px}.students-table .progress-track{min-width:90px;margin-top:8px}.teacher-skill{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:.82rem;color:#75859e}.teacher-skill>span:nth-child(2){flex:1}.teacher-skill small{color:#a3aec0}.reset-panel{margin-top:28px;border:1px solid #eddae0;background:#fff;padding:22px;border-radius:14px;color:#a97785}.reset-panel summary{cursor:pointer;font-size:.86rem}.reset-panel p{font-size:.85rem}.reset-form{display:flex;align-items:center;gap:15px;flex-wrap:wrap;font-size:.85rem}.reset-form input{max-width:250px}.btn.danger{background:#b34257;color:#fff}.table-wrap:empty{display:none}
/* Reading controls and core labels stay comfortable at desktop and text zoom. */
.nav-item{font-size:.9rem}.mini-stats>div>div>span{font-size:.75rem;white-space:normal}.eyebrow,.chapter-card .eyebrow,.hero-chip,.exercise-top>.eyebrow,.tip-card .eyebrow,.activity-count,.course-tag,.pill,.resource-card .eyebrow,.glossary-card>.eyebrow{font-size:.75rem}.chapter-card p,.chapter-card-bottom,.section-heading p,.hero-duration,.dashboard-hero p span,.progress-panel-copy p,.progress-panel .btn,.activity-panel>p,.tip-card p,.tip-card a,.text-link,.resource-card>div>span:last-child,.topbar-title{font-size:.8rem}.progress-ring span{font-size:.7rem}.chapter-card h3{font-size:1.125rem}.chapter-card p{min-height:40px}.nav-heading{font-size:.7rem}.hero-chart .chart-eyebrow{font-size:.58rem}.chart-float>span{font-size:.7rem}.resource-card h3{font-size:.94rem}.lesson-section .eyebrow,.formula-card .eyebrow,.recap-card .eyebrow,.story-card .eyebrow{font-size:.75rem}.source-note{font-size:.78rem}.history-item summary strong{font-size:.875rem}.history-item summary>div>span{font-size:.75rem}.lesson-toc a{font-size:.875rem}
@media(min-width:1550px){.main-content{padding-top:45px}.dashboard-hero{min-height:325px;padding:35px}.dashboard-hero h2{font-size:2.4rem}.hero-chart{width:275px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 295px;gap:30px}.chapter-card{padding:26px}.mini-stats>div{padding:22px}}
@media(max-width:1280px){.sidebar{width:214px;padding-left:16px;padding-right:16px}.app-shell{margin-left:214px}.main-content{padding:30px 28px 45px}.topbar{padding:0 28px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 240px;gap:20px}.hero-chart{width:175px;margin-left:0}.dashboard-hero{padding:26px}.dashboard-hero h2{font-size:1.8rem}.hero-copy{min-width:235px}.mini-stats>div{padding:14px 10px;gap:8px}.mini-stats .stat-icon{width:30px;height:34px}.mini-stats>div>div>span{font-size:.68rem}.chapter-card{padding:18px}.chapter-card .pill{font-size:.65rem}.tip-card{padding:20px}.lesson-grid{gap:28px;grid-template-columns:minmax(0,1fr) 190px}.resource-grid,.glossary-grid{grid-template-columns:repeat(2,1fr)}.teacher-layout{grid-template-columns:minmax(0,1fr) 270px}.course-tag{font-size:.65rem}.sidebar-profile strong{max-width:95px}.sidebar-note p{font-size:.72rem}.hero-chart .chart-eyebrow{font-size:.5rem}}
@media(max-width:1100px){.dashboard-grid{grid-template-columns:1fr}.dashboard-aside{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.progress-panel{padding:19px}.progress-ring{width:123px;height:123px;margin:17px auto}.progress-ring strong{font-size:2rem}.progress-ring span{font-size:.6rem}.activity-panel .section-heading{flex-wrap:wrap}.activity-chart{padding-top:25px}.hero-chart{width:260px;margin-right:30px}.hero-copy{min-width:290px}.dashboard-hero h2{font-size:2.2rem}.dashboard-hero{min-height:300px}.mini-stats>div{padding:20px 16px;gap:13px}.mini-stats>div>div>span{font-size:.75rem}.page-heading>.soft-tag{display:none}.lesson-grid{grid-template-columns:1fr}.lesson-aside{display:none}.teacher-layout{grid-template-columns:1fr}.teacher-layout>aside{max-width:500px}.progress-columns{grid-template-columns:1fr}.review-grid{grid-template-columns:1fr 1fr}.lesson-heading h1{font-size:2.1rem}.lab-grid{grid-template-columns:1fr 160px;gap:16px}.lab-readout{padding:20px}}
@media(max-width:800px){.sidebar{width:244px;transform:translateX(-100%);transition:transform .2s}.sidebar.open{transform:translateX(0)}.mobile-shade{position:fixed;inset:0;background:#10244960;z-index:35}.app-shell{margin-left:0}.mobile-only{display:grid}.main-content{padding:28px 24px 40px}.topbar{height:64px;padding:0 20px}.page-heading h1{font-size:1.85rem}.topbar-title{font-size:.75rem}.course-tag{font-size:.62rem}.app-footer{padding:22px 24px}.course-progress{min-width:145px}.page-heading>.eyebrow{font-size:.65rem}}
@media(max-width:620px){.main-content{padding:26px 18px 35px}.topbar{padding:0 12px}.course-tag{max-width:140px;overflow:hidden;text-overflow:ellipsis}.topbar-title{max-width:180px;font-size:.73rem}.page-heading{align-items:flex-start;margin-bottom:23px;gap:15px}.page-heading h1{font-size:1.85rem;line-height:1.15}.page-heading .eyebrow{font-size:.63rem}.page-heading>div>p{font-size:.82rem;line-height:1.7}.dashboard-hero{padding:25px;min-height:unset}.hero-chart{display:none}.hero-copy{min-width:0}.dashboard-hero h2{font-size:1.95rem;line-height:1.2}.dashboard-hero p{font-size:.9rem}.hero-duration{font-size:.74rem}.mini-stats{gap:8px;margin:17px 0 28px}.mini-stats>div{display:block;text-align:center;padding:16px 7px}.mini-stats .stat-icon{margin:0 auto 12px;width:30px;height:30px;border-radius:8px}.mini-stats>div>div>strong{font-size:1.4rem}.mini-stats>div>div>span{font-size:.68rem;line-height:1.5}.mini-stats strong small{font-size:.68rem}.section-heading{align-items:flex-start;gap:12px}.section-heading h2{font-size:1.07rem;line-height:1.4}.section-heading p{font-size:.73rem}.section-heading .text-link{font-size:.73rem;max-width:90px;text-align:right;line-height:1.5}.chapter-grid{gap:13px;grid-template-columns:1fr}.chapter-card{padding:20px}.chapter-card p{min-height:0;margin-bottom:18px}.card-top{margin-bottom:17px}.chapter-card .pill{font-size:.72rem}.chapter-card h3{font-size:1.16rem}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px}.progress-panel .compact h3{font-size:.85rem}.progress-panel{padding:20px 13px}.progress-ring{width:120px;height:120px}.progress-panel-copy strong{font-size:.72rem;line-height:1.5;display:block}.progress-panel-copy p{font-size:.7rem}.activity-panel{padding:20px 13px}.activity-panel .compact h3{font-size:.85rem}.activity-day{gap:12px;font-size:.65rem}.activity-bar{width:10px}.activity-chart{gap:5px;padding-top:25px}.activity-panel>p{font-size:.75rem;margin-top:25px;line-height:1.7}.tip-card{grid-column:1/-1;position:relative;padding:24px}.tip-card h3 br{display:none}.tip-icon{position:absolute;right:22px;top:22px}.tip-card p{max-width:270px}.tip-card .eyebrow{font-size:.66rem}.app-footer{padding:20px 18px;font-size:.6rem}.app-footer>span:first-child>span{display:none}.course-progress{min-width:90px;text-align:right}.course-progress>strong{font-size:1.1rem}.course-progress>span{font-size:.63rem}.course-progress .progress-track{margin-left:auto;width:85px}.pathway-banner{padding:16px;font-size:.75rem}.pathway-banner>.icon{display:none}.pathway-banner p{font-size:.78rem}.pathway-chapter{gap:12px}.chapter-rail{width:30px}.chapter-number{width:30px;height:34px;border-radius:9px;font-size:.75rem}.pathway-chapter-content h2{font-size:1.15rem;line-height:1.3}.pathway-chapter-content>header .eyebrow{font-size:.58rem}.pathway-chapter-content>header p{font-size:.75rem}.skill-row{padding:16px 13px;gap:10px;flex-wrap:wrap}.skill-status-icon{width:29px;height:29px;border-radius:8px}.skill-status-icon .icon{width:16px;height:16px}.skill-row-body{min-width:calc(100% - 45px)}.skill-row h3{font-size:.87rem;line-height:1.4}.skill-row p{font-size:.73rem;line-height:1.65}.skill-duration{margin-left:39px}.skill-row>.btn,.skill-row>.pill{margin-left:auto}.lesson-heading h1{font-size:1.9rem;line-height:1.2}.lesson-heading>p{font-size:.95rem}.lesson-meta{gap:12px;font-size:.69rem}.story-card{padding:23px}.story-card>p{font-size:1.05rem;line-height:1.8}.story-card>.eyebrow,.lesson-section>.eyebrow,.formula-card>.eyebrow,.recap-card>.eyebrow{font-size:.65rem}.lesson-section{padding:32px 2px 22px}.lesson-section h2{font-size:1.45rem}.lesson-section .lead,.idea-points li{font-size:1rem}.formula-card{padding:23px 21px}.formula{font-size:1.24rem}.formula-card>p{font-size:.85rem}.worked-steps p{font-size:.95rem}.pitfall-card{padding:21px;gap:12px}.pitfall-card p{font-size:.87rem}.lab-invitation{padding:18px;gap:12px;flex-wrap:wrap}.lab-invitation .pill{margin-left:32px}.lesson-cta{flex-direction:column;align-items:stretch}.lesson-cta .btn{width:100%}.lesson-cta p{font-size:.86rem}.recap-card{padding:22px}.recap-card p{font-size:1.03rem}.practice-layout>h1{font-size:1.75rem;line-height:1.25}.practice-heading .pill{font-size:.65rem}.mastery-strip{padding:16px;gap:12px;align-items:flex-start}.mastery-strip strong{font-size:.8rem;line-height:1.5;display:block}.mastery-strip p{font-size:.7rem;line-height:1.7}.mastery-dots{gap:5px;margin-top:3px}.mastery-dots span{width:25px;height:25px}.exercise-card{padding:23px 19px}.exercise-card legend{font-size:1.16rem;line-height:1.6}.choice-label{padding:15px 13px;gap:10px;font-size:.94rem}.choice-letter{display:none}.exercise-actions{flex-direction:column-reverse;align-items:stretch}.exercise-actions .btn{min-height:48px}.feedback-actions{flex-direction:column}.feedback h2{font-size:1.45rem}.feedback>p{font-size:.93rem}.feedback ol{font-size:.9rem}.practice-footnote{font-size:.68rem;align-items:flex-start}.progress-stats{gap:9px}.progress-stats>.panel{padding:17px 12px}.progress-stats .eyebrow{font-size:.57rem}.progress-stats strong{font-size:1.9rem}.progress-stats strong small{font-size:.9rem}.progress-stats p{font-size:.69rem;line-height:1.5}.progress-columns{gap:18px}.panel{padding:22px 18px}.review-focus{gap:15px}.review-focus .stat-icon{width:33px;height:33px}.review-focus h2{font-size:1.05rem}.review-focus p{font-size:.8rem}.review-grid,.resource-grid,.glossary-grid{grid-template-columns:1fr}.resource-card{padding:21px}.resource-card .eyebrow{font-size:.65rem}.resource-card h3{font-size:1rem}.resource-card>div>span:last-child{font-size:.76rem}.glossary-card>.eyebrow{font-size:.65rem}.glossary-card p{font-size:.93rem}.glossary-card h3{font-size:1.07rem}.lab-grid{grid-template-columns:1fr;gap:25px}.lab-panel h2{font-size:1.2rem;line-height:1.4}.lab-panel .section-heading{flex-wrap:wrap}.lab-readout{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}.lab-readout>span{font-size:.65rem}.lab-readout>strong{font-size:1.5rem;margin:0;grid-row:2}.lab-readout>span:nth-of-type(2){grid-column:2;grid-row:1}.lab-readout>p{grid-column:1/-1;margin:12px 0 0}.lab-panel>p{font-size:.9rem}.range-label{font-size:.76rem;line-height:1.5}.teacher-login-card{padding:29px}.teacher-login-card h1{font-size:1.85rem}.teacher-layout>.panel{padding:20px 16px}.students-table td,.students-table th{padding:12px 9px}.students-table{min-width:480px}.page-heading>.btn{font-size:.7rem;padding:10px;min-height:40px}.reset-form{display:block}.reset-form label{display:block;line-height:1.6;margin-bottom:12px}.reset-form input{max-width:none;margin-bottom:15px}.reset-form .btn{width:100%}.empty-state{padding:30px 20px;margin:30px auto}.empty-state h1{font-size:1.8rem}.empty-state p{font-size:.92rem}.prerequisites>.btn{white-space:normal;line-height:1.6}.app-footer>span:last-child{font-size:.6rem}}