@font-face{font-family:Lato;src:url('/static/vendor/lato/Lato-Regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:Lato;src:url('/static/vendor/lato/Lato-Bold.ttf') format('truetype');font-weight:700;font-display:swap}
:root{--ink:#182a40;--muted:#526176;--blue:#2456ac;--blue-soft:#edf3ff;--green:#206957;--paper:#fff;--ground:#f3f5f8;--line:#d7dfe9;--error:#9b2433;--radius:12px;color-scheme:light}
*{box-sizing:border-box;min-width:0}
html{scroll-padding-top:20px;scroll-padding-bottom:100px;scrollbar-color:var(--muted) var(--ground)}
body{margin:0;background:var(--ground);color:var(--ink);font:16px/1.6 Lato,sans-serif;overflow-wrap:anywhere}
::selection{background:#cadcff;color:#142d55}
a{color:var(--blue);text-underline-offset:4px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
button,input,textarea,select{font:inherit}
button,a,input,textarea,select,summary{touch-action:manipulation}
button,a,summary{ -webkit-tap-highlight-color:#c6d9ff }
:focus-visible{outline:3px solid #b04a00;outline-offset:4px}
input,textarea,select{width:100%;border:1px solid #899bb2;border-radius:8px;background:white;color:var(--ink);padding:12px;min-height:48px;caret-color:var(--blue)}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
input[type=checkbox],input[type=radio]{width:22px;height:22px;min-height:22px;accent-color:var(--blue);flex:0 0 22px;margin:0}
textarea{display:block;resize:vertical;line-height:1.55;scroll-margin-block:30px}
select{white-space:nowrap;text-overflow:ellipsis}
label{display:block;font-weight:700;margin:22px 0 8px;line-height:1.5}
fieldset{padding:0;border:0;margin:28px 0 0}
legend{font-weight:700;padding:0}
button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;border:1px solid transparent;border-radius:8px;padding:11px 18px;font-weight:700;line-height:1.4;cursor:pointer;text-align:center;text-decoration:none;max-width:100%;white-space:normal}
.primary{background:var(--blue);color:white}
.primary:hover{background:#194896}
.secondary{background:white;color:var(--blue);border-color:#8fa8d0}
.secondary:hover{background:var(--blue-soft)}
button:disabled{opacity:.65;cursor:wait}
form>button{margin-top:24px}
.full{width:100%}
.masthead{max-width:1184px;margin:auto;padding:12px 32px;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;text-decoration:none;color:var(--ink);line-height:1.2;flex-shrink:0}
.brand small{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:3px}
.account{position:relative;font-size:15px}
.account summary{min-height:48px;display:flex;align-items:center;cursor:pointer;text-decoration:underline;text-underline-offset:4px}
.account>div{position:absolute;z-index:10;right:0;width:220px;background:white;border:1px solid var(--line);border-radius:10px;padding:16px;box-shadow:0 7px 25px #1d2e441a}
.account p{margin:0 0 12px}
main{max-width:850px;margin:0 auto;padding:28px 32px 32px;min-height:65vh}
h1,h2,h3{line-height:1.23;text-wrap:balance;font-weight:700}
h1{font-size:30px;letter-spacing:-.025em;margin:0 0 14px}
h2{font-size:23px;letter-spacing:-.015em;margin:30px 0 12px}
h3{font-size:19px;margin:24px 0 10px}
p{margin:12px 0 20px}
.lead{font-size:17px;line-height:1.55;color:var(--muted);margin:0 0 24px;max-width:72ch}
.muted,small,figcaption{color:var(--muted)}
small{font-size:14px;line-height:1.5}
.paper{padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);margin:26px 0}
.paper h2:first-child{margin-top:0}
.login-intro{max-width:550px;margin:16px auto 30px}
.login-form{max-width:550px;margin:0 auto}
.login-form .muted{font-size:15px;margin:24px 0 0}
.progress-label{display:flex;justify-content:space-between;gap:12px;font-size:15px;margin:20px 0 10px}
progress{appearance:none;display:block;width:100%;height:7px;border:0;border-radius:4px;background:#dbe3ee;overflow:hidden}
progress::-webkit-progress-bar{background:#dbe3ee}
progress::-webkit-progress-value{background:var(--blue)}
progress::-moz-progress-bar{background:var(--blue)}
.next-step{padding:24px;background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:var(--radius)}
.next-step h2{font-size:24px;line-height:1.35;margin:12px 0;max-width:44ch}
.day{border-bottom:1px solid var(--line)}
.day>summary{display:flex;align-items:center;gap:14px;padding:18px 0;cursor:pointer;font-size:15px;color:var(--muted)}
.day>summary strong{display:block;font-size:18px;color:var(--ink);line-height:1.35;margin-top:3px}
.count{flex-shrink:0;font-size:14px}
.day>summary:after{content:'+';font-size:24px;color:var(--blue)}
.day[open]>summary:after{content:'−'}
.question-list{list-style:none;margin:0;padding:0}
.question-list>li{border-top:1px solid var(--line)}
.question-list>li>a{display:flex;align-items:baseline;gap:12px;padding:16px 0;text-decoration:none;color:var(--ink);line-height:1.5}
.question-list>li>a:hover{color:var(--blue);background:#eef3fc}
.question-list small{display:block;margin-top:5px}
.question-list>li>div{padding:16px 0}
.qid{color:var(--muted);font-size:14px;flex:0 0 32px;font-variant-numeric:tabular-nums}
.success-text{color:var(--green)}
.practice-next{margin:36px 0;padding:4px 0 24px}
.filters{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) auto;align-items:end;gap:16px;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
.filters label:first-child{margin-top:0}
.back{display:inline-flex;align-items:center;min-height:44px;font-size:15px;margin:-10px 0 18px}
.notice{padding:16px 18px;background:var(--blue-soft);border-radius:8px;line-height:1.5}
.notice.success{background:#e2f1e9;color:#175441}
.notice.error{background:#fcecef;color:var(--error)}
.sample-label{background:#eaf0f7;color:#344b68}
.actions,.end-links{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}
.save-hint{font-size:14px;color:var(--muted);margin-bottom:0}
.disclosure{border-block:1px solid var(--line);margin:20px 0}
.disclosure+.disclosure{border-top:0;margin-top:-20px}
.disclosure>summary{padding:17px 2px;min-height:52px;cursor:pointer;font-weight:700;line-height:1.45}
.disclosure>div,.disclosure>article{padding:0 0 18px}
.disclosure[open]>summary{color:var(--blue)}
.prose{line-height:1.75;max-width:70ch}
.prose h1{font-size:28px;margin-top:24px}
.prose h2{font-size:24px;margin-top:30px}
.prose h3{font-size:21px}
.prose ul,.prose ol{padding-left:25px}
.prose blockquote{margin:20px 0;padding:1px 18px;border-left:1px solid var(--line)}
.prose img{display:none}
.prose table{display:block;max-width:100%;overflow-x:auto}
.prose a:not([href]){color:inherit;text-decoration:none}
code{font-size:.9em;overflow-wrap:anywhere}
pre{overflow:auto;max-width:100%;padding:16px;background:#eaf0f7;border-radius:8px;font-size:14px;line-height:1.6}
pre code{white-space:pre;overflow-wrap:normal}
.math.block,.katex-display{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:6px 0}
.math.inline .katex{font-size:1.05em}
.sample-section{margin-top:36px}
figure{margin:24px 0}
figure img{display:block;width:100%;height:auto;border:1px solid var(--line);background:white}
figcaption{font-size:14px;margin-top:10px}
.asset-list{list-style:none;padding:0;margin:0}
.asset-list a{display:flex;justify-content:space-between;gap:12px;align-items:center;min-height:48px;padding:8px 0}
.score{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.score legend{margin-bottom:12px}
.score label{display:flex;align-items:center;gap:9px;margin:0;padding:12px 10px;background:white;border:1px solid var(--line);border-radius:8px;font-size:15px;font-weight:400}
.score label:has(input:checked){border-color:var(--blue);background:var(--blue-soft)}
.score label strong{font-size:18px}
.check{display:flex;align-items:center;gap:12px;min-height:48px;font-weight:400}
.user-text{white-space:pre-wrap}
.case-prompt{margin-bottom:28px}
.table-scroll{overflow:auto;max-width:100%;border:1px solid var(--line);background:white}
table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.5;font-variant-numeric:tabular-nums}
th,td{padding:12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;min-width:90px}
th{background:#eaf0f7;font-weight:700}
.footer{max-width:1120px;margin:0 auto;padding:24px 32px 32px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:24px}
.skip{position:fixed;left:15px;top:10px;background:white;padding:12px;z-index:100;clip-path:inset(50%);width:1px;height:1px;overflow:hidden}
.skip:focus{clip-path:none;width:auto;height:auto}
@media(max-width:540px){
 body{font-size:16px}
 .masthead{padding:14px 20px}
 main{padding:28px 20px}
 h1{font-size:28px}
 h2{font-size:23px}
 .lead{font-size:18px;margin-bottom:24px}
 .paper{padding:20px 16px;margin-inline:-4px}
 .day>summary strong{font-size:19px}
 .day>summary{gap:12px}
 .count{font-size:12px}
 .actions{display:grid}
 .actions .button,.actions button{width:100%}
 .score{grid-template-columns:1fr}
 .score label{min-height:50px;font-size:16px}
 .login-intro{margin-top:8px}
 .prose h1{font-size:25px}
 .prose h2{font-size:22px}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
.preset-options{margin:0}
.preset-options label{display:flex;gap:12px;align-items:center;min-height:56px;padding:12px;border:1px solid var(--line);border-radius:8px;font-weight:400}
.preset-options label:has(input:checked){border-color:var(--blue);background:var(--blue-soft)}
.run-status{padding:20px 0;border-block:1px solid var(--line);margin:24px 0}
.run-status h2{margin:0 0 12px}
.run-status p{margin:0}
.run-history{list-style:none;padding:0}
.run-history li{border-bottom:1px solid var(--line)}
.run-history a{display:block;padding:18px 0;text-decoration:none}
.run-history strong,.run-history span,.run-history small{display:block}
.run-history span{color:var(--ink);margin-block:4px}
.lab-summary h1{font-size:23px}
.lab-data th,.lab-data td{white-space:nowrap;overflow-wrap:normal}

/* Workspace navigation and reading surfaces. */
.workspace{max-width:1184px}
.brand-mark{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--blue);color:white;border-radius:10px;font-size:25px;font-weight:700}
.header-note{font-size:14px;color:var(--muted)}
.primary-nav{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.primary-nav a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:8px 12px;border-radius:7px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:700;white-space:nowrap}
.primary-nav a:hover,.primary-nav a[aria-current=page]{color:var(--blue);background:var(--blue-soft)}
.primary-nav a[aria-current=page]{box-shadow:inset 0 -2px var(--blue)}
.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:24px}
.page-heading .lead{margin:0}
.text-action{display:inline-flex;align-items:center;min-height:44px;font-weight:700;flex-shrink:0}
.dashboard-top,.dashboard-body{display:grid;grid-template-columns:minmax(0,1.85fr) minmax(0,1fr);gap:32px;align-items:start}
.dashboard-body{margin-top:32px}
.section-meta{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted);margin:0;line-height:1.5}
.next-step>p{font-size:15px;color:var(--muted);margin:12px 0 18px;max-width:60ch}
.next-step .actions{margin:18px 0 0}
.progress-panel{padding:4px 0}
.progress-panel h2{font-size:17px;margin:0 0 8px}
.progress-number{font-size:32px;font-weight:700;line-height:1.2;margin:8px 0 14px;font-variant-numeric:tabular-nums}
.progress-number span{font-size:16px;font-weight:400;color:var(--muted)}
.progress-panel>.muted{font-size:13px;margin:8px 0 14px}
.panel-link{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;border-top:1px solid var(--line);text-decoration:none;font-size:14px}
.panel-link:hover{background:var(--blue-soft)}
.panel-link>span:last-child{color:var(--muted);font-size:13px}
.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.section-heading h2{margin:0;font-size:21px}
.section-heading>.muted{font-size:13px}
.section-description{font-size:14px;color:var(--muted);margin:8px 0 18px}
.day-number{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);border-radius:9px;background:white;color:var(--blue);font-weight:700;flex-shrink:0}
.day>summary>span:nth-child(2){flex:1}
.day .question-list{padding-left:50px}
.row-arrow{margin-left:auto;color:var(--muted);font-size:22px;flex-shrink:0}
.preview-link{display:grid;grid-template-columns:88px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.preview-link img{width:88px;height:70px;object-fit:contain;background:white;border-radius:6px}
.preview-link strong{font-size:15px;line-height:1.4;display:block}
.preview-link small{display:block;margin-top:4px;font-size:12px}
.preview-link:hover strong{color:var(--blue)}
.practice-panel>.button{margin-top:18px}
.practice-next{margin:24px 0 0;padding:0}
.practice-next h3{margin-top:26px}
.practice-next p{font-size:14px;color:var(--muted);margin:8px 0}
.practice-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 32px}
.practice-card{padding:24px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column}
.practice-card h2{font-size:20px;line-height:1.4;margin:8px 0}
.practice-card .muted{font-size:13px;margin:8px 0}
.practice-card .actions{margin:16px 0}
.practice-card .button{font-size:14px}
.practice-image{display:block;background:white;border:1px solid var(--line);border-radius:8px;padding:8px;margin-top:auto}
.practice-image img{display:block;width:100%;height:180px;object-fit:contain}
.section-tabs{display:flex;flex-wrap:wrap;gap:4px;margin:22px 0;border-bottom:1px solid var(--line);padding-bottom:4px}
.section-tabs a{display:flex;align-items:center;min-height:44px;padding:8px 12px;font-size:14px;font-weight:700;text-decoration:none;border-radius:6px;color:var(--muted)}
.section-tabs a:hover,.section-tabs a[aria-current=page]{color:var(--blue);background:var(--blue-soft)}
.section-tabs a[aria-current=page]{box-shadow:inset 0 -2px var(--blue)}
.answer-snapshot{padding:22px 24px;background:white;border:1px solid var(--line);border-radius:var(--radius)}
.answer-snapshot h2{margin-top:0;font-size:20px}
.answer-snapshot p:last-child{margin-bottom:0}
.reading-content{padding:8px 0;max-width:74ch}
.reading-content h1{font-size:25px}
.material-figure{padding:12px;background:white;border:1px solid var(--line);border-radius:10px}
.material-figure img{border:0}
.material-figure figcaption{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.material-figure figcaption a{display:inline-flex;align-items:center;min-height:44px}
.reading-next{padding:24px;background:var(--blue-soft);border-radius:var(--radius);margin-top:32px}
.reading-next h2{margin-top:0;font-size:22px}
.study-steps{display:flex;gap:16px;list-style:none;padding:0;margin:22px 0;color:var(--muted);font-size:13px}
.study-steps li{flex:1;padding-top:8px;border-top:3px solid var(--line)}
.study-steps .current{color:var(--blue);border-color:var(--blue);font-weight:700}
.study-steps .finished{color:var(--green);border-color:var(--green)}
.optional-note{margin:20px 0}
.optional-note summary{display:flex;align-items:center;min-height:44px;color:var(--blue);cursor:pointer;font-size:14px;font-weight:700}
.optional-note summary::before{content:'+';margin-right:8px}
.optional-note[open] summary::before{content:'−'}
.optional-note label{margin-top:4px}
.filters label{margin-top:0;font-size:14px}
.filters>button{margin:0}
.catalog-list>li{display:flex;gap:24px;align-items:center}
.catalog-list>li>a{flex:1}
.question-list>li>.catalog-actions{display:flex;gap:8px;flex-shrink:0;padding:0}
.catalog-actions a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:8px;color:var(--blue);font-size:14px}
.catalog-list>li{content-visibility:auto;contain-intrinsic-size:auto 108px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
button[aria-busy=true]{opacity:.75;cursor:wait}
button[aria-busy=true]::after{content:'…';margin-left:4px}
@media(max-width:1000px){.masthead{gap:16px}.primary-nav a{padding-inline:9px}.dashboard-top,.dashboard-body{gap:24px;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr)}.next-step{padding:20px}.next-step h2{font-size:22px}.next-step .actions{gap:8px}.next-step .button{font-size:14px;padding-inline:12px}}
@media(max-width:800px){
 .signed-in{padding-bottom:calc(70px + env(safe-area-inset-bottom))}
 .masthead{min-height:64px;padding:10px 24px}
 .primary-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;flex-wrap:nowrap;gap:0;justify-content:center;background:white;border-top:1px solid var(--line);padding:0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
 .primary-nav a{flex:1;max-width:150px;min-height:60px;border-radius:0;font-size:12px;padding:8px 3px}
 .primary-nav a[aria-current=page]{box-shadow:inset 0 3px var(--blue)}
 .dashboard-top,.dashboard-body{grid-template-columns:1fr;gap:24px}
 .progress-panel{padding:16px 18px;background:#eaf0f8;border-radius:10px;display:grid;grid-template-columns:1fr 1fr;gap:4px 18px}
 .progress-panel h2{grid-column:1}.progress-number{grid-column:2;grid-row:1/3;text-align:right;font-size:28px;margin:0}.progress-panel progress,.progress-panel>.muted{grid-column:1/-1}.progress-panel .panel-link{font-size:13px;align-self:end}
 .page-heading{gap:12px;align-items:start}.page-heading>.text-action{font-size:13px}.page-heading .lead{font-size:16px}
 .dashboard-body{margin-top:24px}.practice-panel{border-top:1px solid var(--line);padding-top:24px}
 .filters{grid-template-columns:1fr 1fr}.filters>button{grid-column:1/-1;justify-self:start}
 .practice-grid{grid-template-columns:1fr}.practice-card{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:20px;align-items:center}.practice-image{margin:0}.practice-image img{height:150px}
 .footer{display:block;padding:20px 24px}.footer span{display:block;margin-bottom:8px}
}
@media(max-width:540px){
 main{padding:22px 18px 28px}.masthead{padding:10px 18px}.brand-mark{width:32px;height:32px;font-size:23px}.brand{font-size:17px}.account{font-size:13px}.header-note{font-size:12px;max-width:145px;text-align:right}
 h1{font-size:26px}.page-heading{display:block;margin-bottom:18px}.page-heading>.text-action{margin-top:4px}.page-heading .lead{margin-bottom:0}
 .next-step{padding:18px}.next-step h2{font-size:22px}.next-step>p{font-size:14px}.next-step .actions{display:flex;flex-direction:column}.next-step .button{font-size:15px}.section-meta{font-size:12px}
 .progress-panel .panel-link{display:block;padding:10px 0}.progress-panel .panel-link>span,.progress-panel .panel-link>strong{display:block}
 .section-heading{align-items:center}.section-heading h2{font-size:20px}.section-heading>.muted{font-size:12px;text-align:right}
 .day>summary{gap:10px;padding:16px 0}.day>summary strong{font-size:17px}.day-number{width:30px;height:30px}.day .question-list{padding-left:0}
 .question-list>li>a{padding-block:15px;font-size:15px}.row-arrow{font-size:19px}
 .catalog-list>li{display:block}.question-list>li>.catalog-actions{margin:0 0 8px 42px}.catalog-actions a{padding:6px 10px;min-height:44px}
 .filters{grid-template-columns:1fr;padding:16px;gap:12px}.filters>button{width:100%}
 .practice-card{display:flex;gap:0;align-items:stretch}.practice-card h2{font-size:20px}.practice-card .actions{display:flex;flex-wrap:wrap}.practice-card .actions .button{width:auto}.practice-image img{height:160px}
 .section-tabs{gap:0;margin:18px 0}.section-tabs a{font-size:13px;padding:8px 10px}.study-steps{gap:8px;font-size:12px}
 .answer-snapshot,.reading-next{padding:18px}.material-figure{padding:8px}.material-figure figcaption{font-size:13px;gap:4px}.prose{line-height:1.7}.prose h1{font-size:24px}
}