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:root[data-theme=dark]{color-scheme:dark;--bg:#101b20;--paper:#18282e;--ink:#e3eeef;--muted:#9bb0b7;--line:#30444b;--green:#8dd4bb;--green-light:#243f3b;--mint:#6ac3a1;--blue:#a1c4e1;--blue-light:#243646;--red:#eda6aa;--red-light:#40282d;--shadow:none}
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[data-theme=dark] .button,[data-theme=dark] .report-widget,[data-theme=dark] .skip-link{color:#102820}[data-theme=dark] .button:hover,[data-theme=dark] .report-widget:hover{background:#a3e2cc}
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/* Home: keep tablet and phone controls in a single readable flow. */
@media (max-width:1200px){
  body[data-page="home"] .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  body[data-page="home"] .stats-grid .stat-card:last-child{display:none}
  body[data-page="home"] .session-layout{grid-template-columns:minmax(0,1fr)}
  body[data-page="home"] .library-panel .program-table th:not(:first-child),
  body[data-page="home"] .library-panel .program-table td:not(:first-child){display:none}
  body[data-page="home"] .library-panel .program-table{table-layout:fixed;font-size:.78rem}
  body[data-page="home"] .library-panel .program-table label{font-size:.78rem;line-height:1.45;align-items:flex-start;gap:10px}
  body[data-page="home"] .library-panel .program-table label span{min-width:0;overflow-wrap:anywhere}
  body[data-page="home"] .library-panel .program-table input{margin-top:1px}
  body[data-page="home"] .settings-panel{display:flex;flex-direction:column;gap:22px;align-items:stretch}
  body[data-page="home"] .settings-panel .panel-heading{margin-bottom:0}
  body[data-page="home"] .settings-panel fieldset{width:100%;min-width:0}
  body[data-page="home"] .settings-panel fieldset+fieldset{margin-top:0}
  body[data-page="home"] .settings-panel>.button{align-self:stretch;margin-top:0;width:100%}
  body[data-page="home"] .question-count{display:grid;grid-template-columns:minmax(0,1fr) 84px;gap:16px;align-items:center}
  body[data-page="home"] .question-count input[type=range]{width:100%;min-width:0;margin:0;height:44px}
  body[data-page="home"] .question-count input[type=number]{box-sizing:border-box;width:100%;min-width:0;min-height:44px;padding:8px 10px;border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--ink);font-size:1rem;line-height:1.4;text-align:center}
  body[data-page="home"] .range-limits{display:flex;justify-content:space-between;gap:12px;font-size:.72rem;line-height:1.5;margin-top:6px}
  body[data-page="home"] .mode-option{width:100%;min-width:0;margin-bottom:10px}
  body[data-page="home"] .mode-option:last-child{margin-bottom:0}
  body[data-page="home"] .scoring-strip{display:none}
}

/* Phone layout: four aligned navigation actions, safe areas and touch targets. */
@media(max-width:760px){
  body{padding-bottom:calc(84px + env(safe-area-inset-bottom))}
  .sidebar{height:calc(74px + env(safe-area-inset-bottom));padding:6px max(6px,env(safe-area-inset-right)) calc(6px + env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left));gap:4px;background:var(--paper);align-items:stretch}
  .sidebar nav{flex:3;min-width:0;width:auto;gap:4px}
  .sidebar .nav-link,.sidebar .theme-toggle{min-width:0;min-height:56px;border:0;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:6px 2px;font-size:.65rem;line-height:1.2;text-align:center;color:var(--muted);background:transparent}
  .sidebar .nav-link{flex:1}.sidebar .theme-toggle{display:flex;flex:1;width:auto;margin:0;box-shadow:none}
  .sidebar .theme-toggle span{display:none}.sidebar .theme-toggle::after{content:attr(data-mobile-label)}
  .sidebar .nav-link svg,.sidebar .theme-toggle svg{width:20px;height:20px}
  .sidebar .nav-link.active,.sidebar .theme-toggle[aria-pressed=true]{background:var(--green-light);color:var(--green)}
  .sidebar .theme-toggle:hover{background:var(--green-light)}
  main{padding-left:max(15px,env(safe-area-inset-left));padding-right:max(15px,env(safe-area-inset-right))}
  .page-heading,.panel-heading,.quiz-top{min-width:0}.panel-heading>div{min-width:0}.panel-heading h2{overflow-wrap:anywhere}
  .quiz-top{flex-wrap:wrap;gap:10px;margin-bottom:18px}
  .quiz-top>.text-button{margin-right:auto;min-height:44px}
  .quiz-top .report-widget{position:static;min-height:40px;padding:9px 12px;box-shadow:none;border-radius:9px;font-size:.75rem;order:2}
  .quiz-top>.subtle-badge{order:1}
  .quiz-side .question-map{grid-template-columns:repeat(auto-fill,minmax(34px,1fr));gap:6px}
  .question-meta{flex-wrap:wrap}.question-prompt,.question-theme,.solution,.rationale>div,.result-label{overflow-wrap:anywhere;min-width:0}
  .qcm-choice,.qru-choice{min-width:0;gap:10px}.qcm-choice>span:last-child,.qru-choice>span:last-child{min-width:0;overflow-wrap:anywhere}
  .report-dialog{width:calc(100% - 24px);max-height:calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));padding:20px;background:var(--paper);overscroll-behavior:contain}
  .report-dialog textarea,.report-dialog select{font-size:1rem}.report-current-question{overflow-wrap:anywhere}
  .icon-button{min-width:44px;min-height:44px}.page-footer{gap:12px;flex-wrap:wrap;padding-bottom:8px}
  .table-scroll{max-width:100%;overscroll-behavior-x:contain}.program-table td:first-child{overflow-wrap:anywhere}
  body[data-page=sheets] .program-table{table-layout:fixed}.program-table th:not(:first-child),.program-table td:not(:first-child){width:65px}
  .resume-banner .button{min-width:0}.resume-banner>div{min-width:0}.resume-banner span{overflow-wrap:anywhere}
  .stats-grid .stat-card{min-width:0}.stat-label{overflow-wrap:anywhere}
}
@media(max-width:360px){
  .sidebar .nav-link,.sidebar .theme-toggle{font-size:.6rem}
  .panel{padding:16px}.table-panel,.result-detail{padding:0}.question-panel{padding:18px 14px}
  .quiz-top>.subtle-badge{font-size:.65rem;padding:5px 7px}
  .qcm-choice,.qru-choice{padding:12px 10px;gap:8px}.qcm-choice>span:last-child,.qru-choice>span:last-child{font-size:.9rem}
  .insight-grid{grid-template-columns:1fr 1fr}.insight-grid>div:last-child{grid-column:1/-1}
}

/* Keep correction and status surfaces readable in dark mode. */
[data-theme=dark] .tag,[data-theme=dark] .letter,[data-theme=dark] .map-cell{background:var(--bg);color:var(--muted);border-color:var(--line)}
[data-theme=dark] .rank-a,[data-theme=dark] .map-cell.answered{background:var(--green-light);color:var(--green)}
[data-theme=dark] .rank-b{background:var(--blue-light);color:var(--blue)}
[data-theme=dark] .rationale{background:#1c332f;border-left-color:#538e78}
[data-theme=dark] .rationale.is-wrong{background:var(--red-light);border-left-color:var(--red)}
[data-theme=dark] .rationale .letter{background:var(--paper)}
[data-theme=dark] .grade-banner{background:#3b3023;color:#edd1a4;border-color:#695537}
[data-theme=dark] .grade-banner.success{background:var(--green-light);color:var(--green);border-color:#538e78}
[data-theme=dark] .score-panel{background:var(--green-light)}
[data-theme=dark] .personal-note{background:var(--bg)}
[data-theme=dark] progress,[data-theme=dark] progress::-webkit-progress-bar{background:var(--line)}

:root{--table-heading:#f7f9fa}
:root[data-theme=dark]{--table-heading:#142228}

/* Slide-out series panel, shared across screen sizes. */
body[data-page=quiz] .quiz-layout{grid-template-columns:minmax(0,1fr)}
.series-toggle{position:fixed;right:max(0px,env(safe-area-inset-right));top:calc(12px + env(safe-area-inset-top));z-index:45;width:48px;height:52px;display:grid;place-items:center;border:1px solid var(--line);border-right:0;border-radius:18px 0 0 18px;background:var(--paper);color:var(--green);box-shadow:0 3px 18px #0002}
.series-toggle:hover{background:var(--green-light)}.series-toggle svg{width:24px;height:24px}
.series-drawer{position:fixed;inset:0 0 0 auto;margin:0;width:min(360px,calc(100% - 32px));max-width:none;height:100dvh;max-height:100dvh;padding:24px 20px;padding-top:max(24px,env(safe-area-inset-top));padding-bottom:max(24px,env(safe-area-inset-bottom));border:0;border-left:1px solid var(--line);border-radius:18px 0 0 18px;background:var(--bg);color:var(--ink);overflow-y:auto;overscroll-behavior:contain;box-shadow:-10px 0 40px #0002}
.series-drawer[open]{animation:series-enter .2s ease-out}.series-drawer::backdrop{background:#07171c80}
.drawer-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:25px}.drawer-heading h2{font-size:1rem}.drawer-heading .icon-button{width:44px;height:44px}
.series-drawer .quiz-side{display:flex;flex-direction:column;gap:18px}.series-drawer .question-map{grid-template-columns:repeat(5,minmax(0,1fr))}.series-drawer .map-cell{min-height:40px}.series-drawer .quiz-side .panel>p{display:block;margin-top:16px}
@keyframes series-enter{from{transform:translateX(100%)}to{transform:translateX(0)}}
@media(prefers-reduced-motion:reduce){.series-drawer[open]{animation:none}}

/* Matching edge bubbles and theme-aware resume banner. */
.report-widget.report-bubble{position:fixed;inset:calc(74px + env(safe-area-inset-top)) max(0px,env(safe-area-inset-right)) auto auto;z-index:45;width:48px;height:52px;min-height:52px;display:grid;place-items:center;padding:0;border:1px solid var(--line);border-right:0;border-radius:18px 0 0 18px;background:var(--paper);color:var(--green);box-shadow:0 3px 18px #0002}
.report-bubble span{display:none}.report-bubble svg{width:23px;height:23px}.report-widget.report-bubble:hover{background:var(--green-light)}
.resume-banner{background:var(--green-light);border-color:var(--line);color:var(--ink)}
.resume-banner>div>svg{color:var(--green)}
.resume-banner strong{color:var(--ink)}
.resume-banner span{color:var(--muted)}

.qcm-choice>span:last-child,.qru-choice>span:last-child{font-size:.9rem;line-height:1.5}
@media(max-width:760px){.qcm-choice>span:last-child,.qru-choice>span:last-child{font-size:.84rem;line-height:1.5}}

/* Compact phone question card: retain readable choices and a visible submit action. */
@media(max-width:760px){
  body[data-page=quiz] main{padding-top:12px;padding-bottom:12px}
  body[data-page=quiz] .question-panel{padding:14px 12px}
  body[data-page=quiz] .question-meta{gap:5px;margin-bottom:10px}
  body[data-page=quiz] .case-label{flex-basis:auto;margin:0 0 0 auto;font-size:.58rem}
  body[data-page=quiz] .tag{font-size:.58rem;padding:3px 6px}
  body[data-page=quiz] .question-theme{font-size:.67rem;margin-bottom:7px}
  body[data-page=quiz] .question-prompt{font-size:.94rem;line-height:1.4;letter-spacing:0}
  body[data-page=quiz] .question-instruction{font-size:.7rem;line-height:1.4;margin:9px 0 11px}
  body[data-page=quiz] .choices-list{gap:6px}
  body[data-page=quiz] .qcm-choice,body[data-page=quiz] .qru-choice{min-height:44px;padding:8px 9px;gap:8px;align-items:center;border-radius:9px}
  body[data-page=quiz] .qcm-choice>span:last-child,body[data-page=quiz] .qru-choice>span:last-child{font-size:.81rem;line-height:1.35}
  body[data-page=quiz] .qcm-choice input,body[data-page=quiz] .qru-choice input{margin:0;width:17px;height:17px}
  body[data-page=quiz] .qcm-choice .letter,body[data-page=quiz] .qru-choice .letter{width:24px;height:24px;font-size:.7rem}
  body[data-page=quiz] .question-footer{margin-top:12px;padding-top:12px;gap:0}
  body[data-page=quiz] .question-footer>.muted{display:none}
  body[data-page=quiz] .question-footer .button{min-height:44px;padding:10px 12px;font-size:.81rem}
  body[data-page=quiz] .page-footer{display:none}
}

@media(max-width:760px) and (max-height:740px){
  body[data-page=quiz] .question-instruction{margin:6px 0 8px;font-size:.67rem}
  body[data-page=quiz] .question-panel{padding-top:10px;padding-bottom:10px}
  body[data-page=quiz] .question-meta{margin-bottom:7px}
  body[data-page=quiz] .choices-list{gap:4px}
  body[data-page=quiz] .question-footer{margin-top:8px;padding-top:8px}
}

/* Compact, readable correction on phones. */
@media(max-width:760px){
  .grade-banner{flex-direction:row;align-items:center;justify-content:space-between;gap:10px;padding:9px 11px;margin:12px 0;border-radius:9px}
  .grade-banner strong{font-size:1rem;line-height:1.3}.grade-banner span{font-size:.7rem;line-height:1.35;text-align:right}
  .solution-title{gap:7px;margin-bottom:7px}.solution-title svg{width:16px;height:16px}.solution-title h3{font-size:.82rem}
  .solution>p{font-size:.78rem;line-height:1.45}
  .rationale-list{gap:6px;margin-top:10px}
  .rationale{gap:8px;padding:8px 9px;border-left-width:2px;border-radius:0 7px 7px 0}
  .rationale .letter{width:23px;height:23px;font-size:.65rem}
  .rationale>div{display:grid;grid-template-columns:minmax(0,1fr) auto;column-gap:8px;row-gap:3px;align-items:start}
  .rationale-top{grid-column:2;grid-row:1;display:flex;flex-direction:column;align-items:flex-end;gap:2px;margin:0}
  .rationale-top strong{font-size:.7rem;line-height:1.4}
  .rationale-top>span{font-size:.6rem;line-height:1.3;margin:0;text-align:right}
  .rationale.is-right .rationale-top>span{display:none}
  .rationale p{grid-column:1;grid-row:1;font-size:.78rem;line-height:1.4}
  .rationale .explain{grid-column:1/-1;grid-row:2;margin:0;font-size:.73rem;line-height:1.4}
  .solution .source{font-size:.62rem;line-height:1.4;margin:9px 0 0}
  .result-body .solution{margin-top:12px}
}

.confetti-canvas{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:85}

/* Correction: colour encodes the expected answer; badges show the student's selection. */
.rationale.answer-false{background:var(--paper);border:1px solid var(--line);border-left:2px solid var(--line);border-radius:7px}
.rationale.answer-true{background:var(--green-light);border:1px solid var(--line);border-left:3px solid var(--green);border-radius:7px}
.rationale.answer-false .rationale-top strong{color:var(--muted)}
.rationale.answer-true .rationale-top strong{color:var(--green)}
.rationale .student-choice{display:block;color:var(--muted)}
.rationale .student-choice.selected{color:var(--ink);font-weight:600;text-decoration:underline;text-underline-offset:3px}
@media(max-width:760px){.rationale-top{max-width:100px}.rationale-top .student-choice{display:block;font-size:.61rem;line-height:1.4}.rationale-top strong{font-size:.67rem}}

.series-score{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;background:var(--paper);border:1px solid var(--line);border-radius:10px;font-size:.83rem}
.series-score>strong{font-size:1.2rem;font-variant-numeric:tabular-nums}.series-score>strong>span{font-size:.85rem;color:var(--muted);font-weight:400}
.series-drawer .map-cell.score-full{background:#e0f3e8;color:#226344;border-color:#8cc7a5}
.series-drawer .map-cell.score-partial{background:#fff0d8;color:#895410;border-color:#dfb66f}
.series-drawer .map-cell.score-zero{background:#fde4e4;color:#9d343d;border-color:#d59a9f}
[data-theme=dark] .series-drawer .map-cell.score-full{background:#214d3b;color:#a1e5bf;border-color:#4a926b}
[data-theme=dark] .series-drawer .map-cell.score-partial{background:#503c22;color:#f5d08a;border-color:#ab8349}
[data-theme=dark] .series-drawer .map-cell.score-zero{background:#502b32;color:#ffb5bd;border-color:#ae6471}

.question-report-button{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin:12px 0 0;padding:9px 13px;min-height:44px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--muted);font-size:.78rem}.question-report-button:hover{background:var(--green-light);color:var(--green)}.question-report-button svg{width:18px;height:18px}

.report-dialog[open]{animation:report-appear .22s ease-out both}
.report-dialog[open]::backdrop{animation:report-backdrop-appear .22s ease-out both}
@keyframes report-appear{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes report-backdrop-appear{from{opacity:0}to{opacity:1}}
@media(prefers-reduced-motion:reduce){.report-dialog[open],.report-dialog[open]::backdrop{animation:none}}

.result-score-column{display:flex;flex-direction:column;gap:12px;min-width:0}.new-series-button{width:100%;min-height:44px}.result-score-column .score-panel{width:100%}
.result-breakdown{display:flex;flex-direction:column;margin-top:16px}.result-breakdown>div{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.83rem}.result-breakdown strong{font-size:1.15rem;font-variant-numeric:tabular-nums;white-space:nowrap}.result-breakdown small{font-size:.75rem;font-weight:400;color:var(--muted)}
.result-error-summary{margin-top:14px;color:var(--muted);font-size:.77rem;line-height:1.5}.result-error-summary strong{color:var(--ink)}.result-duration{display:flex;align-items:center;gap:8px;margin:14px 0;font-size:.78rem;color:var(--muted)}.result-duration svg{width:16px;height:16px}.result-duration strong{margin-left:auto;color:var(--ink)}
[data-theme=dark] .score-pill.incomplete{background:#503c22;color:#f5d08a}
@media(max-width:760px){body[data-page=results] .result-summary{grid-template-columns:minmax(0,1fr)}.result-insights{padding:18px}.result-insights h2{font-size:.95rem}.result-breakdown>div{font-size:.78rem;padding:8px 0}.result-error-summary{font-size:.73rem}}
@media(min-width:761px) and (max-width:1200px){
  body[data-page=quiz] main{padding-top:18px;padding-bottom:16px}
  body[data-page=quiz] .question-panel{padding:18px 20px}
  body[data-page=quiz] .question-meta{margin-bottom:10px}
  body[data-page=quiz] .question-theme{margin-bottom:8px}
  body[data-page=quiz] .question-prompt{font-size:1.04rem;line-height:1.45}
  body[data-page=quiz] .question-instruction{margin:10px 0 14px;font-size:.76rem}
  body[data-page=quiz] .choices-list{gap:7px}
  body[data-page=quiz] .qcm-choice,body[data-page=quiz] .qru-choice{min-height:44px;padding:9px 12px;gap:10px;align-items:center}
  body[data-page=quiz] .qcm-choice>span:last-child,body[data-page=quiz] .qru-choice>span:last-child{font-size:.84rem;line-height:1.4}
  body[data-page=quiz] .question-footer{margin-top:14px;padding-top:14px}
  body[data-page=quiz] .question-report-button{margin-top:10px}
}

.tablet-new-series{display:none}
@media(min-width:761px) and (max-width:1200px){
  body[data-page=results] .page-heading{position:relative;padding-right:180px}
  body[data-page=results] .tablet-new-series{display:inline-flex;position:absolute;right:0;top:30px;width:158px;min-height:44px}
  body[data-page=results] .result-score-column>.new-series-button{display:none}
}

.course-search{display:block;width:100%;min-height:44px;padding:10px 13px;margin-bottom:14px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);font-size:.88rem}.course-search::placeholder{color:var(--muted)}.course-search:focus{border-color:var(--green)}.course-search-empty{font-size:.8rem;color:var(--muted);margin-bottom:12px}
@media(max-width:1200px){body[data-page=home] .library-panel .program-table thead{display:none}}
@media(max-width:760px){.course-search{font-size:1rem}}

.course-search-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.course-search-row .course-search{flex:1;min-width:0;width:auto;margin:0}
.course-search-row .all-items{display:flex;flex:0 0 auto;align-items:center;gap:7px;margin:0;padding:0 3px;min-height:44px;white-space:nowrap;font-size:.83rem}
.course-search-row .all-items input{margin:0}
@media(max-width:760px){.course-search-row{gap:10px}.course-search-row .all-items{font-size:.78rem}}

.range-scale{min-width:0;width:100%;flex:1}.range-scale input[type=range]{width:100%;margin:0;display:block}.question-count{align-items:start}
.question-ticks{position:relative;height:22px;margin:0 8px;font-size:.64rem;line-height:1.4;color:var(--muted)}.question-ticks span{position:absolute;top:5px;transform:translateX(-50%)}.question-ticks span::before{content:"";position:absolute;left:50%;top:-6px;height:4px;width:1px;background:var(--muted)}
@media(min-width:761px) and (max-width:1200px){
  body[data-page=home] .correction-modes{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
  body[data-page=home] .correction-modes legend{float:none;width:100%}
  body[data-page=home] .correction-modes .mode-option{margin:0;height:100%}
}

[data-theme=dark] .scoring-strip{background:var(--paper);border-color:var(--line);color:var(--ink)}
[data-theme=dark] .guide-scoring{background:var(--bg);color:var(--ink)}
[data-theme=dark] .score-key{border-color:var(--line)}

.range-limits>span:first-child{display:none}.range-limits{justify-content:flex-end}

.library-panel{display:flex;flex-direction:column;max-height:var(--rhythm-height,none)}
.library-panel>.panel-heading,.library-panel>.course-search-row,.library-panel>.course-pagination{flex-shrink:0}
.library-panel>.program-table-wrap{min-height:0;overflow:auto}
.library-panel .program-table td{padding-top:7px;padding-bottom:7px}
.course-pagination{display:flex;align-items:center;justify-content:center;gap:14px;padding-top:12px;font-size:.78rem;color:var(--muted)}.course-pagination[hidden]{display:none}
.course-pagination button{width:44px;height:36px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);font-size:1.2rem}.course-pagination button:hover:not(:disabled){background:var(--green-light)}

.program-table .college-heading th{background:var(--bg);color:var(--green);font-size:.75rem;font-weight:650;letter-spacing:.3px;padding:9px 10px!important;text-align:left;border-bottom:1px solid var(--line);white-space:normal}

.program-table tbody tr:not(.college-heading)>td:first-child{padding-left:26px}
@media(max-width:760px){.program-table tbody tr:not(.college-heading)>td:first-child{padding-left:22px}}