@font-face{font-family:QBSystem;src:url('/assets/fonts/SUIT-Variable.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
:root{--qb-navy:#0d2342;--qb-blue:#0866ff;--qb-blue-dark:#0652cc;--qb-ink:#11243e;--qb-muted:#64768b;--qb-line:#dfe8f2;--qb-page:#edf5ff;--qb-orange:#ff7b29;--qb-green:#118268;--qb-radius:22px;--qb-shadow:0 12px 40px #173b6610}
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20px;z-index:150;background:#fff;border-radius:12px;color:var(--qb-blue)}.qb-skip:focus{top:10px}.qb-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:25px;min-height:84px;padding:13px max(24px,calc((100vw - 1520px)/2));background:linear-gradient(120deg,#102c4c,var(--qb-navy));color:#fff;box-shadow:0 2px 12px #07162c14}.qb-brand{display:block;flex-shrink:0}.qb-brand img{display:block;width:210px;height:auto}.qb-header-nav{display:flex;gap:32px;font-size:14px;font-weight:700}.qb-header-nav a{padding:8px 0;color:#c5d5e9}.qb-header-nav a[aria-current]{color:#fff;border-bottom:2px solid #3e94ff}.qb-header-actions{display:flex;gap:10px;align-items:center}.qb-button{display:inline-flex;gap:9px;justify-content:center;align-items:center;min-height:46px;padding:11px 19px;border:1px solid var(--qb-line);border-radius:12px;background:#fff;font-weight:800;font-size:14px;line-height:1.35;text-align:center}.qb-button svg{width:19px;height:19px}.qb-header-login{background:#1768e8;border-color:transparent;color:#fff;min-width:86px}.qb-icon-button{display:inline-grid;place-items:center;width:44px;height:44px;flex-shrink:0;border:1px solid var(--qb-line);border-radius:12px;background:#fff}.qb-header .qb-icon-button{color:#d9e9ff;background:#fff1;border:0;border-radius:50%}.qb-menu-toggle{display:none}.qb-shell{width:min(1600px,100%);margin:auto;display:grid;grid-template-columns:222px minmax(0,1fr);min-height:calc(100dvh - 84px)}.qb-sidebar{position:sticky;top:84px;align-self:start;height:calc(100dvh - 84px);padding:30px 18px 18px;background:#ffffffdd;border-right:1px solid #e0ebf8;display:flex;flex-direction:column;gap:7px;overflow-y:auto}.qb-nav-label{padding:0 13px;margin:0 0 11px;color:#8999ae;font-size:12px;font-weight:800;letter-spacing:.03em}.qb-sidebar>a,.qb-sidebar-footer>a{display:flex;align-items:center;gap:12px;padding:12px 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linear infinite}@keyframes qb-spin{to{transform:rotate(360deg)}}.qb-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:min(90vw,560px);padding:13px 21px;border-radius:14px;background:#122b4c;color:#fff;z-index:150;box-shadow:0 12px 30px #0002;font-size:13px}.qb-dialog{max-width:calc(100% - 32px);width:470px;border:1px solid #dfe7f2;border-radius:23px;padding:42px 31px 25px;background:#fff;text-align:center;color:var(--qb-ink);box-shadow:0 25px 90px #12284633}.qb-dialog::backdrop{background:#0b203a88;backdrop-filter:blur(3px)}.qb-dialog h2{font-size:26px;line-height:1.4;margin:21px 0 10px}.qb-dialog p{color:var(--qb-muted);font-size:14px}.qb-dialog-close{position:absolute;top:12px;right:12px;width:35px;height:35px;border:0;color:#8392a6}.qb-dialog-mark{display:grid;place-items:center;width:57px;height:57px;margin:auto;background:#eaf3ff;border-radius:18px;color:var(--qb-blue)}.qb-dialog-mark svg{width:30px;height:30px}.qb-safe-note{display:flex;align-items:center;justify-content:center;gap:7px;border-radius:12px;padding:13px 7px;background:#eef5ff;margin:22px 0 0!important;font-size:11px!important}.qb-safe-note svg{color:var(--qb-blue);width:16px;height:16px}.qb-image-dialog{width:min(1100px,calc(100% - 24px));padding:45px 15px 15px;max-height:95dvh;overflow:auto}.qb-image-dialog img{display:block;max-width:100%;height:auto;margin:auto}.qb-image-dialog p{font-size:12px}.qb-mobile-nav{display:none}.qb-error-view{padding:45px 25px;text-align:center}.qb-error-view h2{margin:12px 0}.qb-error-view p{font-size:14px;color:var(--qb-muted);overflow-wrap:anywhere}.qb-no-script{padding:24px;text-align:center}.qb-footer-note{color:#8a9bb0;font-size:10px;margin-top:30px}.qb-select-year{max-width:180px}.qb-session-complete{padding:45px;text-align:center}.qb-session-complete>svg{width:42px;height:42px;margin:auto;color:var(--qb-green)}
@media(min-width:1601px){.qb-header{padding-inline:calc((100vw - 1520px)/2)}}
@media(max-width:1200px){.qb-columns{grid-template-columns:minmax(0,1fr) 240px;gap:17px}.qb-main{padding:28px 25px 55px}.qb-shell{grid-template-columns:200px minmax(0,1fr)}.qb-setup-row{grid-template-columns:150px minmax(0,1fr);padding:16px 13px}.qb-option{font-size:12px;padding:10px 8px}.qb-card{padding:22px}.qb-header-nav{gap:24px}.qb-note-script{display:none}}
@media(max-width:1000px){.qb-header-nav{display:none}.qb-columns{grid-template-columns:minmax(0,1fr)}.qb-side-stack{grid-template-columns:repeat(3,minmax(0,1fr))}.qb-stat-row{gap:12px}.qb-progress-ring{width:75px;height:75px}.qb-progress-ring span{font-size:20px}.qb-progress-ring:before{inset:8px}.qb-side-card{padding:17px}.qb-stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.qb-metric-big{font-size:30px}}
@media(max-width:760px){.qb-header{min-height:72px;padding:11px 18px;gap:12px}.qb-brand img{width:175px}.qb-header-actions{gap:6px}.qb-header .qb-icon-button{width:38px;height:38px}.qb-header-login{min-height:38px;min-width:70px;padding:8px 12px;font-size:12px}.qb-menu-toggle{display:inline-grid}.qb-shell{display:block;min-height:calc(100dvh - 72px)}.qb-sidebar{display:none;position:fixed;z-index:80;top:72px;right:0;left:auto;width:265px;height:calc(100dvh - 72px);box-shadow:-15px 20px 40px #0e284727;background:#fff}.qb-sidebar.open{display:flex}.qb-main{padding:24px 17px calc(110px + env(safe-area-inset-bottom))}.qb-breadcrumb{font-size:10px;margin-bottom:13px}.qb-page-heading{margin-bottom:22px}.qb-page-heading h1{font-size:29px;line-height:1.35}.qb-page-heading p{font-size:13px;line-height:1.7;margin-top:7px}.qb-page-heading .qb-actions{display:none}.qb-card{border-radius:19px;padding:21px 18px}.qb-card h2{font-size:22px}.qb-setup-row{grid-template-columns:1fr;gap:11px;padding:16px 13px}.qb-setup-label{gap:10px}.qb-setup-label b{font-size:14px}.qb-setup-label small{font-size:11px}.qb-setup-label>div{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}.qb-setup-label small{margin:0}.qb-options{gap:7px;padding-left:0}.qb-option{min-height:45px;font-size:12px;padding:10px}.qb-setup-fields{gap:10px;margin-top:19px}.qb-block{min-height:53px;font-size:15px}.qb-side-stack{grid-template-columns:1fr}.qb-side-card{padding:19px}.qb-side-card .qb-empty{padding:18px 15px}.qb-columns{gap:17px}.qb-question-row{padding:18px 17px;grid-template-columns:1fr;gap:12px}.qb-question-row h3{font-size:14px}.qb-question-row-actions{justify-content:flex-end}.qb-question-row-actions .qb-button{min-height:40px;font-size:12px;padding:10px 14px}.qb-filterbar{gap:8px}.qb-filterbar select{font-size:12px;min-height:43px;padding:9px 10px;flex-basis:calc(50% - 8px)}.qb-search{flex-basis:100%}.qb-tabs{margin-bottom:17px}.qb-tabs button{font-size:12px;padding:7px 8px;min-height:44px}.qb-pills{gap:6px;margin-bottom:15px}.qb-pill{padding:7px 11px;font-size:11px}.qb-prompt-card{padding:18px 16px;margin-bottom:20px}.qb-prompt{font-size:16px;line-height:1.85}.qb-prompt-head{margin-bottom:14px}.qb-solve-top{gap:10px}.qb-solve-progress{gap:12px}.qb-solve-progress strong{font-size:17px}.qb-timer{font-size:11px}.qb-answer-field{min-height:160px;font-size:16px;padding:14px}.qb-note-field{font-size:13px;min-height:82px}.qb-solve-actions{display:grid;grid-template-columns:1fr;gap:12px}.qb-solve-actions .qb-actions{display:flex;flex-wrap:nowrap}.qb-solve-actions .qb-actions .qb-button{flex:1;padding:11px 8px;font-size:12px;min-height:45px}.qb-solve-actions>.qb-primary{width:100%;min-height:50px}.qb-adjacent .qb-button{font-size:12px;padding:10px 13px}.qb-result-summary{gap:18px}.qb-result-summary .qb-progress-ring{width:95px;height:95px}.qb-result-summary .qb-progress-ring:before{inset:9px}.qb-result-summary h2{font-size:22px}.qb-result-summary p{font-size:12px}.qb-result-box{padding:20px 17px}.qb-result-box h3{font-size:15px}.qb-soft-panel{font-size:13px;padding:15px}.qb-result-grid{gap:13px}.qb-stat-grid{gap:10px}.qb-stat-card{padding:18px 15px}.qb-stat-card strong{font-size:27px}.qb-mobile-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;z-index:60;bottom:0;left:0;right:0;padding:10px 10px calc(9px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid #e3eaf4;box-shadow:0 -6px 22px #16345608}.qb-mobile-nav a{display:flex;flex-direction:column;align-items:center;gap:4px;color:#7c8da2;font-size:10px;font-weight:650}.qb-mobile-nav a svg{width:24px;height:24px}.qb-mobile-nav a.active{color:var(--qb-blue);font-weight:850}.qb-toast{bottom:calc(85px + env(safe-area-inset-bottom));width:max-content;font-size:12px;padding:12px 17px}.qb-dialog{padding:39px 22px 22px;border-radius:22px}.qb-dialog h2{font-size:23px}.qb-dialog p{font-size:13px}.qb-session-complete{padding:35px 20px}.qb-notice{font-size:11px}.qb-footer-note{font-size:10px}.qb-assessment .qb-actions{gap:7px}.qb-assessment .qb-button{font-size:12px;padding:10px 9px}.qb-admin-json{font-size:11px}.qb-select-year{max-width:none}.qb-inline-fields{flex-wrap:wrap}}
@media(max-width:380px){.qb-header{padding-inline:12px}.qb-brand img{width:150px}.qb-header-actions{gap:3px}.qb-header-actions>.qb-icon-button:first-child{display:none}.qb-page-heading h1{font-size:26px}.qb-main{padding-inline:12px}.qb-card{padding-inline:15px}.qb-option{padding:9px 7px}.qb-prompt{font-size:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media print{.qb-header,.qb-sidebar,.qb-mobile-nav,.qb-solve-actions,.qb-adjacent,.qb-toast,.qb-filterbar,.qb-pagination,.qb-footer-note{display:none!important}.qb-shell{display:block}.qb-main{padding:0;background:#fff}.qb-card,.qb-result-box{box-shadow:none;break-inside:avoid;border-color:#ccc}.qb-columns{display:block}.qb-side-stack{display:none}.qb-prompt-image-button img{max-height:600px}.qb-prompt-image-button span{display:none}.qb-answer-field{border:1px solid #ccc}}

.qb-numeric-list{display:grid;gap:13px}.qb-numeric-row{display:grid;grid-template-columns:150px minmax(0,1fr);align-items:center;gap:15px;padding:15px;border-radius:12px;background:#f4f8ff}.qb-numeric-row>label{font-size:13px;font-weight:750}.qb-numeric-row .qb-inline-fields{flex-wrap:nowrap}.qb-unit-input{max-width:90px}.qb-keyword{display:inline-flex;align-items:center;gap:5px}.qb-keyword svg{width:14px;height:14px}.qb-assignment-choices{display:grid;gap:9px;max-height:500px;overflow-y:auto}.qb-assignment-choice{display:flex!important;flex-direction:row;align-items:flex-start;gap:12px!important;padding:15px;border:1px solid #dce6f2;border-radius:12px;background:#f8fbff}.qb-assignment-choice:has(input:checked){border-color:#4e91f0;background:#ecf4ff}.qb-assignment-choice input{width:18px;height:18px;margin-top:3px;flex-shrink:0;accent-color:var(--qb-blue)}.qb-assignment-choice b{display:block;font-size:13px}.qb-assignment-choice small{display:block;color:var(--qb-muted);margin-top:4px;font-size:11px}.qb-session-complete .qb-question-list{margin-top:20px;text-align:left}.qb-session-complete .qb-question-row{font-size:13px;text-align:left;width:100%;grid-template-columns:minmax(0,1fr) auto;white-space:normal;line-height:1.7}.qb-tabs button:focus-visible{outline-offset:2px}@media(max-width:760px){.qb-numeric-row{grid-template-columns:1fr;gap:8px;padding:14px}.qb-unit-input{max-width:75px}.qb-numeric-row input{font-size:16px}}

.qb-brand{display:flex;align-items:center;gap:10px}.qb-brand-mark{display:block;width:46px;height:49px;overflow:hidden;flex-shrink:0}.qb-brand-mark img{width:210px;height:49px;max-width:none}.qb-brand-copy{display:grid;gap:3px}.qb-brand-copy b{color:#fff;font-size:19px;letter-spacing:-.045em;line-height:1.3}.qb-brand-copy small{color:#c9d8eb;font-size:8px;letter-spacing:.01em;white-space:nowrap}@media(max-width:760px){.qb-brand{gap:8px}.qb-brand-mark{width:38px;height:41px}.qb-brand-mark img{width:175px;height:41px}.qb-brand-copy b{font-size:17px}.qb-brand-copy small{font-size:7px}}@media(max-width:380px){.qb-brand{gap:6px}.qb-brand-mark{width:34px;height:37px}.qb-brand-mark img{width:158px;height:37px}.qb-brand-copy b{font-size:15px}.qb-brand-copy small{font-size:6px}}
.qb-header .qb-brand-mark img{max-inline-size:none}

.qb-sidebar-logout{display:flex;align-items:center;gap:12px;margin-top:8px;padding:12px 15px;border:1px solid #e0e9f4;border-radius:12px;background:#fff;color:#60738d;font-size:13px;font-weight:750;text-align:left}.qb-sidebar-logout:hover{background:#f1f6ff}


/* Written questions are live text and isolated math/diagram fragments, not paper captures. */
.qb-rich-content{font-size:1rem;line-height:1.85;overflow-wrap:anywhere;min-width:0;max-width:100%;white-space:normal;color:#202b3c}
.qb-rich-content .qb-inline-math{display:inline-block;vertical-align:middle;max-width:100%;overflow-x:auto;overflow-y:hidden;line-height:1;scrollbar-width:thin;margin:.08em .14em}
.qb-math-text{display:block;max-width:none;overflow:visible;font-family:"Times New Roman","STIX Two Math",serif;user-select:text}
.qb-text-fragment{white-space:normal}.qb-unit-fragment{white-space:nowrap}.qb-text-fragment sup{font-size:.7em;line-height:0;vertical-align:super}.qb-fragment-image{border:0;background:transparent;display:inline-block;vertical-align:middle;padding:.1em .16em;margin:0;max-width:100%;cursor:zoom-in;text-align:left;line-height:1}
.qb-fragment-image img{display:block;max-width:100%;height:auto;object-fit:contain;border:0;background:#fff}.qb-diagram-fragment{display:block;margin:.75em 0}
.qb-answer-choices .qb-rich-content{display:block;min-width:0;flex:1}.qb-written-count{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:700}.qb-scope-caption{width:100%;margin:.35rem 0 0;font-size:.8rem;color:#5a6678;line-height:1.65}
.qb-written-select{min-width:0;width:100%;max-width:28rem}.qb-scope-notice{margin:.5rem 0;font-size:.82rem;line-height:1.6;color:#6e5835}
@media(max-width:600px){.qb-rich-content{font-size:1rem;line-height:1.85}.qb-written-select{max-width:100%}.qb-fragment-image{padding:.08em 0}.qb-inline-math{touch-action:pan-x pan-y}.qb-content-break{line-height:1.7}}

.qb-written-choice{display:flex;align-items:flex-start;gap:.7rem;white-space:normal;padding:1rem;min-width:0}.qb-written-choice>input{margin-top:.65rem;flex-shrink:0}.qb-choice-number{flex-shrink:0;min-width:1.2rem;padding-top:.25rem}.qb-written-choice>.qb-rich-content{flex:1;min-width:0}.qb-choice-list .qb-written-choice{max-width:100%}.qb-written-choice .qb-fragment-image:focus-visible{outline:2px solid var(--qb-blue)}


/* Stable stopwatch digits in the solve header and completed summary. */
.qb-timer{white-space:nowrap;font-variant-numeric:tabular-nums;flex-shrink:0}.qb-complete-time{font-variant-numeric:tabular-nums;white-space:nowrap}

#qb-action-error:has([data-action=resume]){flex-wrap:wrap;align-items:center}#qb-action-error:has([data-action=resume])>span{flex:1 1 220px}

/* Active learning choices keep both actions readable on narrow screens. */
.qb-session-choice{display:grid;gap:14px;background:#edf5ff;color:#244970}.qb-session-choice p{margin:4px 0}.qb-session-choice small{display:block;font-size:11px;color:var(--qb-muted)}.qb-session-choice .qb-actions .qb-button{flex:1 1 130px}