@font-face{font-family:stixText;src:url(../media/STIXTwoText.p.2uu34y9hox7yf.woff2)format("woff2");font-display:block;font-weight:400 700;font-style:normal}@font-face{font-family:stixText;src:url(../media/STIXTwoText_Italic.p.1hhpctbbag_v7.woff2)format("woff2");font-display:block;font-weight:400 700;font-style:italic}.stixtext_425580db-module__okZJoW__className{font-family:stixText}.stixtext_425580db-module__okZJoW__variable{--font-stix-text:"stixText"}
@font-face{font-family:stixMath;src:url(../media/STIXTwoMath.p.0vuxnzfzb9ehw.woff2)format("woff2");font-display:block;font-weight:400}.stixmath_e2a09bee-module__Rzuvuq__className{font-family:stixMath;font-weight:400}.stixmath_e2a09bee-module__Rzuvuq__variable{--font-stix-math:"stixMath"}
:root{--bg:#fff;--surface:#fff;--field-bg:#dde2e9;--ink:#19243a;--muted:#69758b;--primary:#315cdf;--green:#21865d;--red:#c94b50;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-6:48px;--radius:24px}*{box-sizing:border-box}html{scroll-behavior:smooth;font-family:var(--font-stix-text), var(--font-stix-math);font-synthesis:none}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-size:20px;font-weight:400;line-height:32px}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:inherit;text-decoration:none}svg{flex-shrink:0}h1,h2,h3,h4,h5,h6,p{font-size:inherit;margin:0}small{font-size:inherit}h1,h2,h3,h4,h5,h6,b,strong,summary,label,.button,.course-brand,.email-brand,.eyebrow,.answer-step legend{font-weight:500}em{font-style:normal}::selection{background:#d8e3ff}:focus-visible{color:var(--ink);background-color:#cbd8f4;outline:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip-link{top:var(--space-1);left:var(--space-2);z-index:1000;padding:var(--space-1) var(--space-2);border-radius:var(--radius);background:var(--surface);position:fixed;transform:translateY(-200%)}.skip-link:focus{transform:none}label{gap:var(--space-1);margin-bottom:var(--space-2);flex-direction:column;display:flex}label small{color:var(--muted)}input,textarea,select{width:100%;min-width:0;min-height:var(--space-6);padding:var(--space-1) var(--space-3);border-radius:var(--radius);background:var(--field-bg);color:var(--ink);border:0;transition:background .15s}input:not([type=radio]),select{height:var(--space-6)}input:focus,textarea:focus,select:focus{background:#cbd8f4;outline:none}input::placeholder,textarea::placeholder{color:#617087}input[readonly],textarea[readonly]{background:var(--field-bg);color:#58647a}textarea{min-height:112px;padding:var(--space-2) var(--space-3);resize:vertical}summary{cursor:pointer}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit}fieldset{border:0;min-width:0;margin:0;padding:0}.button{justify-content:center;align-items:center;gap:var(--space-1);min-height:var(--space-6);padding:var(--space-1) var(--space-3);border-radius:var(--radius);text-align:center;white-space:normal;border:0;transition:background .15s;display:inline-flex}.button.primary{background:var(--primary);color:#fff}.button.primary:hover{background:#264dc2}.button.primary:focus-visible{background:var(--ink);color:#fff}.button.secondary{color:#374762;background:#e9edf3}.button.secondary:hover{background:#e1e7ef}.button.secondary:focus-visible{color:var(--ink);background:#cbd8f4}.button.ghost{color:#66758e;background:0 0}.button.ghost:hover{color:var(--primary);background:#e8efff}.button.ghost:focus-visible{color:var(--ink);background:#cbd8f4}.button.danger{color:#a83940;background:#fff2f2}.button.danger:focus-visible{color:#a83940;background:#f7d1d3}.icon-button{width:var(--space-6);height:var(--space-6);border-radius:var(--radius);color:var(--muted);background:0 0;border:0;place-items:center;padding:0;display:inline-grid}.icon-button:hover{background:#e9edf3}.icon-button:focus-visible{color:var(--ink);background:#cbd8f4}.notice{align-items:flex-start;gap:var(--space-1);margin:var(--space-2) 0;padding:var(--space-2);border-radius:var(--radius);color:#526480;background:#edf2fb;display:flex}.notice.error{color:#a94449;background:#fff0f0}.loading,.loading-page{justify-content:center;align-items:center;gap:var(--space-2);min-height:100vh;padding:var(--space-3);display:flex}.loading-page{flex-direction:column}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.center-card{justify-content:center;gap:var(--space-2);max-width:608px;min-height:100vh;padding:var(--space-3);flex-direction:column;margin:0 auto;display:flex}.eyebrow{color:#79869e}.panel{min-width:0}.course-shell{background:var(--bg);min-height:100vh}.course-header{z-index:60;align-items:center;gap:var(--space-2);height:64px;padding:0 var(--space-4);background:var(--bg);grid-template-columns:auto minmax(0,1fr) auto;display:grid;position:sticky;top:0}.course-brand,.email-brand{align-items:center;gap:var(--space-2);border-radius:var(--radius);display:flex}.course-header-actions{justify-content:flex-end;align-items:center;gap:var(--space-1);display:flex}.course-progress{align-items:center;gap:var(--space-1);justify-self:center;width:100%;min-width:0;max-width:256px;display:flex}.course-progress-track{min-width:0;height:var(--space-1);border-radius:var(--space-1);background:var(--field-bg);flex:1;overflow:hidden}.course-progress-fill{background:var(--primary);height:100%}.course-progress-value{color:var(--muted);font-variant-numeric:tabular-nums;flex-shrink:0}.answer-streak{align-items:center;gap:var(--space-1);padding:var(--space-1);color:#b64715;font-weight:500;display:inline-flex}.course-main{max-width:1200px;padding:var(--space-4) var(--space-4) 80px;margin:0 auto}.learning-flow{max-width:736px;margin:0 auto}.run-layout.single{max-width:704px;margin:0 auto}.question-area{min-width:0}.run-topline{min-height:var(--space-4);margin-bottom:var(--space-3);align-items:center;display:flex}.back-link{align-items:center;gap:var(--space-1);color:#8091af;display:inline-flex}.email-page{min-height:100vh;padding:var(--space-4) var(--space-2);place-items:center;display:grid}.email-card{width:100%;max-width:368px}.email-brand{margin-bottom:var(--space-4)}.email-card form>label{margin-bottom:var(--space-1)}.email-card form>.button{width:100%;margin-top:var(--space-2)}.question-prompt{overflow-wrap:break-word}.math{scrollbar-width:thin;max-width:100%;overflow:auto hidden}.math-inline{vertical-align:middle;max-width:100%;display:inline-block;overflow:auto hidden}math{font-family:var(--font-stix-math);font-size:inherit;font-weight:400}math mtext{font-family:var(--font-stix-text), var(--font-stix-math)}.question-card>.math{min-height:104px;margin-top:var(--space-3);padding:var(--space-3) var(--space-2);border-radius:var(--radius);background:var(--field-bg);align-items:center;display:grid}.answer-form{margin-top:var(--space-3)}.answer-controls{align-items:center;gap:var(--space-1);flex-wrap:wrap;display:flex}.answer-entry{border-radius:var(--radius);background:var(--field-bg);flex:256px;align-items:center;min-width:0;max-width:368px;transition:background .15s;display:flex}.answer-entry:focus-within{background:#cbd8f4}.answer-entry .answer-input{background:0 0;flex:1;width:0}.answer-entry .answer-submit{width:var(--space-6);height:var(--space-6);flex-shrink:0;padding:0}.answer-entry.is-correct{background:#e1f3e8}.answer-entry.is-incorrect{background:#fce4e5}.answer-status{width:var(--space-4);height:var(--space-6);flex-shrink:0;place-items:center;display:inline-grid}.answer-entry.is-correct .answer-status{color:var(--green)}.answer-entry.is-incorrect .answer-status{color:var(--red)}.answer-step input:not([type=radio]){max-width:368px}.written-entry{flex-basis:100%;align-items:flex-end;max-width:none}.written-entry .written-work{background:0 0;flex:1;width:0}.written-work{height:240px;min-height:192px}.written-feedback{margin-top:var(--space-2)}.question-card .written-work.is-correct{background:#e1f3e8}.question-card .written-work.is-incorrect{background:#fce4e5}.saved-note{align-items:center;gap:var(--space-1);margin-top:var(--space-2);color:#5a907b;display:flex}.answer-step{min-width:0;margin-bottom:var(--space-3)}.answer-step:last-child{margin-bottom:0}.answer-step label,.answer-step legend{margin-bottom:var(--space-1)}.step-options{gap:var(--space-1);display:grid}.step-options label{align-items:center;gap:var(--space-2);min-height:var(--space-6);padding:var(--space-2) var(--space-3);border-radius:var(--radius);background:var(--field-bg);cursor:pointer;margin:0;font-weight:400;display:flex}.step-options label:has(input:checked){background:#e8efff}.step-options label:focus-within{background:#cbd8f4}.step-options input{appearance:none;width:var(--space-2);height:var(--space-2);background:#b7c2d4;flex-shrink:0;min-height:0;margin:0;padding:0}.step-options input:checked{background:var(--primary)}.step-options input:focus-visible{background:var(--ink)}.step-options span{overflow-wrap:anywhere;min-width:0}.task-actions{align-items:center;gap:var(--space-1);margin-top:var(--space-3);flex-wrap:wrap;display:flex}:is(.question-card .answer-step.is-correct input:not([type=radio]),.question-card .answer-step.is-correct .step-options label:has(input:checked)){background:#e1f3e8}:is(.question-card .answer-step.is-incorrect input:not([type=radio]),.question-card .answer-step.is-incorrect .step-options label:has(input:checked)){background:#fce4e5}.question-card .solution{margin-top:var(--space-4);color:#43536f;overflow-wrap:break-word}.solution p+p{margin-top:var(--space-1)}.answer-step legend,.answer-step label span,.step-options span{overflow-wrap:anywhere}@media (max-width:768px){.course-header{padding:0 var(--space-2)}.course-main{padding:var(--space-3) var(--space-2) 64px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
