:root{--slate:#3c3a4f;--green:#1f8a5b;--green-d:#15724a;--orange:#ee6a2b;--line:#e7e7ee;--line2:#d9d9e2;--ink:#24262f;--muted:#73768a;--bg:#eef0f3;--sel:#eef4ff;--selbd:#9db8e6}
*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,"Segoe UI",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;font-size:15px}main{max-width:980px;margin:0 auto;padding:28px 18px 96px}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--slate);color:#fff;padding:0 18px;height:54px}.brand{display:flex;align-items:center;gap:9px;color:#fff;text-decoration:none;font-weight:700}.brand-mark{display:grid;place-items:center;width:23px;height:23px;border-radius:6px;background:var(--orange)}.timer{background:#fbf7ea;color:#46443a;border:1px solid #e7dcb6;padding:5px 14px;border-radius:5px;font-size:.86rem}.topbar-right{display:flex;align-items:center;gap:12px}.user{opacity:.8;font-size:.86rem}.calc-toggle{background:transparent;color:#fff;border:1px solid #6a6880;padding:6px 12px;border-radius:5px;cursor:pointer}
.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:26px 28px;box-shadow:0 1px 2px rgba(20,20,40,.04)}.btn{border:1px solid var(--green);background:var(--green);color:#fff;padding:8px 17px;border-radius:5px;font-size:.9rem;cursor:pointer;font-weight:650}.btn:hover{background:var(--green-d)}.btn.gray{background:#fff;color:var(--ink);border-color:var(--line2)}.btn.gray:hover{background:#f4f4f7}.btn:disabled{opacity:.4}.crumb{margin-bottom:16px}.crumb a,.linkbtn{color:var(--green);text-decoration:none;border:0;background:none;cursor:pointer;font:inherit}.home-hero{text-align:center;padding:38px 20px 8px}.home-hero h1{font-size:1.8rem}.home-hero p{color:var(--muted);margin-top:8px}.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin-top:24px}.exam-tile{text-align:left;display:flex;flex-direction:column;gap:9px;cursor:pointer;border-top:3px solid var(--orange);transition:.15s;font:inherit;color:inherit}.exam-tile:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(20,20,40,.09)}.exam-tile .tag{align-self:flex-start;background:#fdece2;color:var(--orange);font-size:.68rem;font-weight:800;padding:3px 9px;border-radius:4px;text-transform:uppercase}.exam-tile h3{font-size:1.02rem}.meta,.muted{color:var(--muted)}.go{margin-top:auto;color:var(--green);font-weight:700}.intro h1{font-size:1.4rem}.intro .sub{color:var(--muted);margin:4px 0 18px}.banner-ok,.banner-continue{padding:12px 16px;border-radius:6px;margin-bottom:18px}.banner-ok{background:#ecf4fa;border:1px solid #cfe2f1;color:#28658c}.banner-continue{background:#fff8ea;border:1px solid #f0dfae;color:#7a5b17}.details{border:1px solid var(--line);border-radius:6px;overflow:hidden;margin-bottom:15px}.details .dh{background:#f7f7fa;padding:9px 16px;font-weight:800;color:var(--muted);text-transform:uppercase;font-size:.74rem}.details table{width:100%;border-collapse:collapse}.details td{padding:10px 16px;border-top:1px solid var(--line);font-size:.88rem}.details td.k{color:var(--muted);width:20%}.section-list{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 20px}.section-list span{background:#f7f7fa;border:1px solid var(--line);border-radius:5px;padding:5px 9px;font-size:.8rem}.actions{display:flex;gap:10px;flex-wrap:wrap}.actions.center{justify-content:center}
.examtitle{font-size:.95rem;font-weight:700}.qhead{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.05em;margin:5px 0 16px;padding-bottom:12px;border-bottom:1px solid var(--line)}.qnum-badge{background:var(--orange);color:#fff;padding:1px 7px;border-radius:4px}.case-link{display:inline-flex;color:var(--green);background:#fff;border:1px solid var(--line2);border-radius:5px;padding:6px 11px;cursor:pointer;margin-bottom:16px}.question-body{font-size:1rem;font-weight:600;white-space:normal}.part-hint{color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;margin:18px 0 9px}.open-input{width:100%;min-height:260px;padding:12px 14px;border:1px solid var(--line2);border-radius:6px;font:inherit;line-height:1.5;resize:vertical}.open-input:focus{outline:none;border-color:var(--selbd);box-shadow:0 0 0 2px var(--sel)}.save-hint{color:var(--muted);font-size:.78rem;margin-top:6px}.clearlink{color:var(--green);background:none;border:0;cursor:pointer;margin-top:8px}.runbar{position:sticky;bottom:0;background:#fff;border-top:1px solid var(--line);margin:28px -18px -96px;padding:13px 18px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.runbar .grp{display:flex;gap:9px;flex-wrap:wrap}.mark-btn.on{background:var(--orange);border-color:var(--orange);color:#fff}
.overlay{position:fixed;inset:0;background:rgba(22,22,34,.5);z-index:40;display:flex;align-items:center;justify-content:center;padding:20px}.modal{background:#fff;border-radius:8px;max-width:620px;width:100%;padding:24px;max-height:88vh;overflow:auto}.modal.wide{max-width:900px}.modal h2{margin-bottom:12px}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:18px}.source-text{white-space:pre-wrap;word-break:normal;font:13px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#fafafc;border:1px solid var(--line);border-radius:6px;padding:14px;overflow:auto}.ov-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:7px;margin:14px 0}.ov-cell{min-height:44px;border:1px solid var(--line2);border-radius:5px;background:#fff;cursor:pointer;font-weight:700}.ov-cell.answered{background:#ecf4fa;border-color:var(--selbd)}.ov-cell.marked{box-shadow:inset 0 0 0 2px var(--orange)}.ov-cell.current{outline:2px solid var(--green)}.result-head{text-align:center}.score-total{display:flex;justify-content:center;align-items:baseline;gap:10px;margin:18px 0}.score-total strong{font-size:1.6rem}.review-q{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px 20px;margin:14px 0}.review-q .rh{display:flex;justify-content:space-between;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:10px}.review-label{font-size:.82rem;color:var(--muted);margin-top:16px}.summary-answer{white-space:pre-wrap;border:1px solid var(--line2);background:#fafafc;border-radius:6px;padding:12px 14px;margin-top:6px}.summary-answer.empty{color:var(--muted);font-style:italic}.official{margin-top:14px;border:1px solid #d8e7de;border-radius:6px;background:#f7fbf8}.official summary{cursor:pointer;padding:11px 13px;font-weight:700;color:var(--green)}.official-body{padding:0 14px 14px}.selfscore{display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:12px;border-top:1px dashed var(--line)}.selfscore input{width:90px;padding:7px 8px;border:1px solid var(--line2);border-radius:5px}
.calculator{position:fixed;top:84px;right:24px;width:288px;background:#2b2a3a;color:#fff;border-radius:10px;box-shadow:0 16px 50px rgba(0,0,0,.42);z-index:50;overflow:hidden}.calc-head{display:flex;justify-content:space-between;padding:10px 14px;background:#1f1e2c}.calc-close{background:none;border:0;color:#fff}.calc-display{width:calc(100% - 24px);margin:12px;padding:11px;border:0;border-radius:6px;background:#12111b;color:#fff;text-align:right;font-size:1.1rem}.calc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;padding:0 12px 14px}.calc-grid button{padding:10px 0;border:0;border-radius:6px;background:#3d3b52;color:#fff}.calc-grid button:nth-child(5n){background:#54507a}
@media(max-width:600px){main{padding:18px 12px 96px}.card{padding:20px 18px}.qhead{flex-direction:column}.runbar .grp{width:100%}.calculator{left:8px;right:8px;width:auto}.topbar .user{display:none}.details table,.details tbody,.details tr,.details td{display:block}.details td.k{width:auto;font-weight:700;padding-bottom:2px}.details td:not(.k){padding-top:2px}}
@media print{#topbar,#calculator,.runbar,.actions,.crumb,.case-link{display:none!important}body{background:#fff}main{max-width:none;padding:0}.review-q{break-inside:avoid}}

/* AI exam grading */
.score-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:560px;margin:18px auto}
.score-pair .score-total{margin:0;padding:14px;border:1px solid var(--line);border-radius:8px;background:#fafafc;display:flex;flex-direction:column;align-items:center;gap:2px}
.score-pair .score-total small{font-size:.72rem;color:var(--muted);font-weight:500}
.ai-actions{display:flex;justify-content:flex-start;margin-top:14px}
.ai-main,.ai-btn{background:#4b45a5;border-color:#4b45a5}
.ai-main:hover,.ai-btn:hover{background:#3d388e;border-color:#3d388e}
.ai-result{margin-top:10px;border:1px solid #dcdcf0;border-radius:8px;background:#fbfbff;overflow:hidden}
.ai-empty{padding:12px 14px;color:var(--muted);font-size:.86rem}
.ai-error{padding:12px 14px;color:#a33;background:#fff4f4;font-size:.86rem}
.ai-grade-head{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:13px 14px;background:#f0effb;border-bottom:1px solid #dcdcf0}
.ai-grade-head>div{display:flex;gap:8px;align-items:baseline}
.ai-grade-head span{color:var(--muted);font-size:.78rem}
.ai-grade-head strong{font-size:1.12rem;color:#332e86}
.ai-confidence{font-size:.7rem!important;text-transform:uppercase;letter-spacing:.04em}
.ai-criteria{padding:6px 14px}
.ai-criterion{padding:10px 0;border-bottom:1px solid #e8e8f3}
.ai-criterion:last-child{border-bottom:0}
.ai-criterion>div{display:flex;justify-content:space-between;gap:12px}
.ai-criterion b{font-size:.86rem}
.ai-criterion span{white-space:nowrap;color:#332e86;font-weight:750;font-size:.8rem}
.ai-criterion p{margin:4px 0 0;color:var(--muted);font-size:.82rem}
.ai-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:12px 14px;border-top:1px solid #e8e8f3}
.ai-columns h5,.ai-improved h5{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin-bottom:5px}
.ai-columns ul{padding-left:18px}
.ai-columns li{margin:3px 0;font-size:.84rem}
.ai-improved{padding:12px 14px;border-top:1px solid #e8e8f3;background:#f8f8fc}
.ai-improved p{white-space:pre-wrap;font-size:.86rem}
@media(max-width:600px){.score-pair,.ai-columns{grid-template-columns:1fr}.ai-grade-head{align-items:flex-start}.ai-grade-head>div{flex-direction:column;gap:0}}
@media print{.ai-actions,#gradeAllBtn{display:none!important}}


/* During an exam, the source is a reading pane, not a modal covering the answer. */
main:has(.exam-workspace){max-width:1560px;width:calc(100% - 40px);padding:22px 0 100px}
.exam-workspace{display:grid;grid-template-columns:minmax(0,1fr);align-items:start;gap:18px}
.exam-workspace.with-source{grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr)}
.exam-workspace .answer-panel{min-width:0}
.exam-workspace .qhead{flex-wrap:wrap}
.exam-workspace .question-body{overflow-wrap:anywhere}
.exam-workspace .open-input{min-height:clamp(320px,52vh,680px)}
.source-panel{min-width:0;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:9px;box-shadow:0 1px 2px rgba(20,20,40,.04);position:sticky;top:66px;height:min(790px,calc(100dvh - 110px));overflow:hidden}
.source-panel[hidden]{display:none}
.source-panel-head{display:flex;align-items:start;justify-content:space-between;gap:16px;padding:19px 21px 16px;border-bottom:1px solid var(--line);background:#fcfcfe}
.source-panel-head h2{font-size:1.05rem;line-height:1.35;letter-spacing:-.01em;margin:4px 0 0}
.source-kicker{color:var(--muted);font-size:.72rem;font-weight:750;letter-spacing:.07em;text-transform:uppercase}
.source-close{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:5px;padding:4px 9px;line-height:1.5;color:var(--muted)}
.source-close:hover{background:#f4f4f7;color:var(--ink)}
.source-panel-scroll{min-height:0;overflow:auto;overscroll-behavior:contain;padding:19px 21px 24px;flex:1}
.source-panel-scroll p{margin-bottom:10px}
.source-panel-scroll img,.source-panel-scroll svg{max-width:100%;height:auto}
.source-panel-scroll table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse}
.source-panel-scroll th,.source-panel-scroll td{padding:6px 8px;border:1px solid var(--line)}
.source-panel .source-text{font-size:.82rem;line-height:1.65;background:transparent;border:0;border-radius:0;padding:0;overflow-wrap:anywhere;white-space:pre-wrap}
.source-section-title{font-size:.74rem;letter-spacing:.065em;text-transform:uppercase;color:var(--muted);font-weight:800;margin:2px 0 10px}
.source-case{border:1px solid var(--line);border-radius:7px;padding:13px 15px;background:#fafafc;margin-bottom:12px}
.source-notice{font-size:.8rem;color:#755c2b;border-left:3px solid #e8be67;background:#fffaf0;padding:10px 12px;margin-bottom:22px!important}
.source-empty{font-size:.88rem;color:var(--muted)}
.source-related summary{cursor:pointer;color:var(--green);font-weight:700;padding:10px 0}
.source-related ol{padding-left:24px}
.source-related li{padding:14px 0;border-top:1px solid var(--line);font-size:.87rem}
.source-related li strong{display:block;margin-bottom:6px}
.source-related .source-question h4{margin:10px 0 6px}
.source-related .source-question ul{padding-left:20px}
.exam-workspace .case-link{font-weight:650;margin-bottom:18px}
.exam-workspace .case-link[aria-expanded="true"]{background:#eff9f3;border-color:#b6d8c3}
@media(max-width:920px){
  main:has(.exam-workspace){width:calc(100% - 24px);padding:16px 0 98px}
  .exam-workspace.with-source{grid-template-columns:minmax(0,1fr)}
  .source-panel{position:relative;top:auto;height:auto;max-height:46dvh}
  .source-panel-scroll{min-height:80px}
  .exam-workspace .open-input{min-height:310px}
}
@media print{
  main:has(.exam-workspace){max-width:none;width:100%;padding:0}
  .exam-workspace.with-source{grid-template-columns:1fr 1fr}
  .source-panel{position:static;height:auto;max-height:none;overflow:visible}
  .source-panel-scroll{overflow:visible}
  .source-close,.case-link{display:none!important}
}


/* Restored official tables that were images in the original March 2026 PDF. */
.exam-figure{margin:14px 0 22px;max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
.source-panel-scroll .exam-figure-table{width:100%;min-width:650px;border:0;border-collapse:collapse;display:table;font-size:.82rem;line-height:1.5}
.exam-figure-table caption{caption-side:top;padding:11px 13px;background:#f0f4f7;color:var(--ink);font-weight:750;text-align:left}
.exam-figure-table th,.exam-figure-table td{padding:8px 10px;border:0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.exam-figure-table thead th{color:var(--muted);background:#fafafc;font-weight:750;border-bottom:2px solid var(--line2)}
.exam-figure-table tbody th{font-weight:500}
.exam-figure-table .amount{white-space:nowrap;text-align:right;font-variant-numeric:tabular-nums}
.exam-figure-table tr.total th,.exam-figure-table tr.total td{font-weight:800;border-top:2px solid var(--ink);border-bottom:0;background:#f0f7f3}
.exam-figure-source{font-size:.72rem;color:var(--muted);padding:8px 12px 10px;margin:0!important}
@media print{.exam-figure{overflow:visible}.source-panel-scroll .exam-figure-table{min-width:0}}