:root{
  --navy:#172641;--navy2:#263957;--bg:#f4f6fa;--paper:#fff;--sub:#f8f9fd;
  --ink:#1e2b42;--muted:#697891;--line:#e2e7ef;--blue:#4966e9;--blue2:#eaf0ff;
  --blue3:#2947c0;--green:#168a66;--greenbg:#e9f8f1;--red:#d64e58;--redbg:#fff0f0;
  --orange:#b8791d;--orangebg:#fff6e9;--shadow:0 10px 35px rgba(32,50,85,.055);
  --radius:16px;color-scheme:light
}
body[data-theme="dark"]{
  --navy:#0b1220;--navy2:#25314b;--bg:#101623;--paper:#1c2637;--sub:#172131;
  --ink:#eef3fa;--muted:#a0afc5;--line:#334258;--blue:#91a5ff;--blue2:#283559;
  --blue3:#c0ccff;--green:#67d8a9;--greenbg:#1c403b;--red:#ff8f9c;--redbg:#442b38;
  --orange:#ffd280;--orangebg:#433b2b;--shadow:none;color-scheme:dark
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 Inter,"Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #8ba1ff;outline-offset:2px}
button:disabled{opacity:.45;cursor:not-allowed}
a{color:var(--blue)}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(25px,3vw,34px);letter-spacing:-.8px;line-height:1.2;margin-bottom:9px}
h2{font-size:21px;letter-spacing:-.35px;margin-bottom:8px}
h3{font-size:16px;margin-bottom:7px}
small{font-size:12px}
.muted{color:var(--muted)}
.eyebrow{font-size:10px;letter-spacing:1.45px;text-transform:uppercase;color:var(--blue);font-weight:800}
.loading-screen{min-height:100vh;display:grid;place-content:center;justify-items:center;gap:10px;color:var(--muted)}
.loading-mark{display:grid;place-items:center;width:54px;height:54px;background:#5269e8;color:white;border-radius:16px;font-weight:900;font-size:19px;box-shadow:0 8px 22px #5269e844}
.shell{display:flex;min-height:100vh}
.appnav{background:var(--navy);width:250px;flex:0 0 250px;color:#eef2fa;position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;z-index:50;transition:transform .2s}
.brand{display:flex;align-items:center;gap:12px;padding:25px 20px 20px}
.brand-symbol{display:grid;place-items:center;width:42px;height:42px;background:#5b70ee;color:#fff;border-radius:13px;box-shadow:0 5px 15px #3d53bb66;font-size:16px;font-weight:900;letter-spacing:-.5px}
.brand strong{display:block;font-size:14px;letter-spacing:.15px}
.brand small{color:#9cb0d0;display:block;font-size:10px;margin-top:2px}
.nav-section{padding:19px 22px 8px;color:#8297b6;text-transform:uppercase;font-size:10px;letter-spacing:1.45px;font-weight:800}
.navlinks{padding:0 11px}
.navlink{border:0;width:100%;display:flex;align-items:center;gap:11px;background:transparent;padding:10px 12px;border-radius:9px;text-align:left;color:#b6c5dd;font-size:13px;margin:2px 0;min-height:41px}
.navlink:hover,.navlink.active{background:#314365;color:white}
.navlink.active{box-shadow:inset 3px 0 0 #a9baff;font-weight:700}
.nav-num{display:grid;place-items:center;width:23px;height:23px;border-radius:7px;background:#ffffff13;color:#dce5f4;font-size:11px;font-weight:800;flex-shrink:0}
.navlink.active .nav-num{background:#6378ef;color:#fff}
.nav-count{margin-left:auto;color:#91a6c5;font-size:10px}
.navfoot{margin-top:auto;padding:17px 18px;border-top:1px solid #ffffff1c;color:#9dafca;font-size:11px;display:grid;gap:7px}
.appmain{flex:1;min-width:0}
.topbar{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid var(--line);background:var(--paper);position:sticky;top:0;z-index:30;gap:15px}
.top-left,.top-actions{display:flex;align-items:center;gap:11px;min-width:0}
.breadcrumbs{color:var(--muted);font-size:12px;display:flex;align-items:center;gap:8px;min-width:0}
.breadcrumbs strong{color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:min(38vw,430px)}
.top-search{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--sub);border-radius:10px;padding:0 10px;height:38px;width:min(280px,28vw)}
.top-search input{width:100%;min-width:0;border:0;outline:0;background:transparent;font-size:12px}
.top-search input:focus{outline:0}
.icon-btn{display:grid;place-items:center;border:1px solid var(--line);background:var(--paper);width:38px;height:38px;border-radius:10px;color:var(--muted)}
.icon-btn:hover{border-color:var(--blue);color:var(--blue)}
.icon{width:18px;height:18px;display:inline-block;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.menu-toggle{display:none}
.content{max-width:1500px;margin:0 auto;padding:30px 32px 65px}
.pageintro{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:23px}
.pageintro p{margin:0;color:var(--muted);font-size:13px;max-width:720px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:28px 30px;margin-bottom:20px;background:linear-gradient(125deg,var(--paper),var(--blue2));border:1px solid var(--line);border-radius:20px;overflow:hidden;position:relative}
.hero:after{content:"";position:absolute;width:240px;height:240px;border:1px solid #8ea2ff33;border-radius:50%;right:6%;top:-135px;box-shadow:0 0 0 24px #8ea2ff0a,0 0 0 50px #8ea2ff08}
.hero-copy{position:relative;z-index:1;max-width:760px}
.hero h1{margin:5px 0 8px}
.hero p{margin:0;color:var(--muted);font-size:13px}
.hero-mark{position:relative;z-index:1;width:90px;height:90px;display:grid;place-items:center;border-radius:23px;background:#5269e8;color:white;font-size:27px;font-weight:900;box-shadow:0 12px 28px #5269e844;flex-shrink:0}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;margin-bottom:28px}
.stat{padding:17px 18px;display:flex;align-items:center;gap:13px}
.stat-icon{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:var(--blue2);color:var(--blue);flex-shrink:0}
.stat strong{font-size:22px;display:block;line-height:1.1;font-variant-numeric:tabular-nums}
.stat span{display:block;color:var(--muted);font-size:11px;margin-top:4px}
.section-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:28px 0 13px}
.section-heading h2{margin:0}
.section-heading p{margin:3px 0 0;color:var(--muted);font-size:12px}
.exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}
.exam-card{padding:18px;display:flex;flex-direction:column;gap:12px;min-width:0;transition:transform .16s,border-color .16s}
.exam-card:hover{transform:translateY(-2px);border-color:#a9b8f7}
.exam-card-head{display:flex;align-items:flex-start;gap:12px}
.exam-number{display:grid;place-items:center;width:38px;height:38px;flex-shrink:0;border-radius:12px;background:var(--blue2);color:var(--blue3);font-size:14px;font-weight:850}
.exam-card h3{font-size:14px;line-height:1.45;margin:1px 0 3px;overflow-wrap:anywhere}
.exam-source{font-size:10px;color:var(--muted);overflow-wrap:anywhere}
.exam-metrics{display:flex;flex-wrap:wrap;gap:7px}
.pill{display:inline-flex;align-items:center;gap:5px;border-radius:999px;background:var(--sub);border:1px solid var(--line);padding:4px 8px;color:var(--muted);font-size:10px;font-weight:650}
.pill.blue{background:var(--blue2);border-color:transparent;color:var(--blue3)}
.pill.orange{background:var(--orangebg);border-color:transparent;color:var(--orange)}
.pill.green{background:var(--greenbg);border-color:transparent;color:var(--green)}
.exam-note{border-left:3px solid var(--orange);background:var(--orangebg);color:var(--orange);padding:8px 10px;border-radius:0 8px 8px 0;font-size:11px;line-height:1.5}
.card-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto}
.btn{border:1px solid var(--line);padding:9px 13px;min-height:37px;border-radius:9px;background:var(--paper);font-weight:700;font-size:11px;display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none;white-space:nowrap;transition:.15s}
.btn:hover:not(:disabled){border-color:var(--blue);background:var(--sub)}
.btn.primary{background:#4761e2;border-color:#4761e2;color:#fff;box-shadow:0 3px 12px #4f68ca2a}
.btn.primary:hover:not(:disabled){background:#3c55d4;color:#fff}
.btn.soft{background:var(--blue2);border-color:transparent;color:var(--blue3)}
.btn.warn{color:var(--red)}
.btn.small{padding:7px 10px;min-height:32px;font-size:10px}
.btn.ghost{background:transparent}
.resume-card{padding:16px 19px;display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:25px}
.resume-card p{margin:3px 0 0;font-size:11px;color:var(--muted)}
.exam-header{padding:21px 23px;margin-bottom:16px}
.exam-header-top{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.exam-header h1{font-size:25px;margin:4px 0 5px}
.exam-header .source{font-size:11px;color:var(--muted);overflow-wrap:anywhere}
.exam-header-stats{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}
.notice{display:flex;gap:10px;padding:12px 14px;border:1px solid #e6c98d;background:var(--orangebg);color:var(--orange);border-radius:12px;font-size:11px;line-height:1.6;margin-bottom:16px}
.notice strong{display:block;margin-bottom:2px}
.modebar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:15px;flex-wrap:wrap}
.segment{display:inline-flex;padding:4px;background:var(--sub);border:1px solid var(--line);border-radius:10px;gap:3px}
.segment button{border:0;background:transparent;border-radius:7px;padding:8px 13px;color:var(--muted);font-size:11px;font-weight:700}
.segment button.active{background:var(--paper);color:var(--blue3);box-shadow:0 1px 4px #17264118}
.filter-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.filter-chip{border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:6px 10px;font-size:10px;color:var(--muted)}
.filter-chip.active{background:var(--blue2);border-color:transparent;color:var(--blue3);font-weight:750}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:16px;align-items:start}
.question-panel{padding:23px;min-width:0}
.question-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:17px}
.question-label{font-size:11px;color:var(--muted);font-weight:750;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.question-label strong{color:var(--ink);font-size:12px}
.question-prompt{font-size:16px;line-height:1.75;font-weight:650;white-space:pre-line;margin-bottom:18px;overflow-wrap:anywhere}
.options-list{display:grid;gap:9px}
.option{display:flex;align-items:flex-start;gap:11px;width:100%;padding:12px 13px;text-align:left;border:1px solid var(--line);border-radius:11px;background:var(--paper);font-size:13px;line-height:1.55;transition:.12s}
.option:hover{border-color:#aab7f6;background:var(--sub)}
.option.selected{border-color:var(--blue);background:var(--blue2);box-shadow:inset 0 0 0 1px var(--blue)}
.option-letter{width:25px;height:25px;display:grid;place-items:center;flex-shrink:0;border-radius:8px;background:var(--sub);border:1px solid var(--line);font-size:10px;font-weight:850;color:var(--muted)}
.option.selected .option-letter{background:var(--blue);border-color:var(--blue);color:#fff}
.option-text{padding-top:2px}
.short-answer{width:100%;min-height:115px;resize:vertical;border:1px solid var(--line);border-radius:11px;background:var(--sub);padding:12px;font-size:13px;line-height:1.6}
.no-key{margin-top:16px;padding:10px 12px;background:var(--blue2);color:var(--blue3);border-radius:9px;font-size:10px;line-height:1.5}
.incomplete-note{margin-top:13px;padding:10px 12px;background:var(--orangebg);color:var(--orange);border-radius:9px;font-size:10px;line-height:1.55}
.question-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:18px;padding-top:15px;border-top:1px solid var(--line)}
.note-area{margin-top:13px}
.note-area textarea{width:100%;min-height:78px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--sub);font-size:12px}
.question-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px}
.question-footer .left,.question-footer .right{display:flex;gap:8px;align-items:center}
.navigator{padding:17px;position:sticky;top:84px}
.navigator-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.navigator-head h3{margin:0}
.progress-track{height:7px;background:var(--sub);border-radius:999px;overflow:hidden;margin:9px 0 7px}
.progress-fill{height:100%;background:linear-gradient(90deg,#4966e9,#7b8cff);border-radius:999px;width:0}
.progress-caption{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}
.navigator-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin-top:15px;max-height:390px;overflow-y:auto;padding:2px}
.nav-q{border:1px solid var(--line);background:var(--paper);border-radius:8px;min-height:34px;font-size:10px;color:var(--muted);font-weight:750;position:relative}
.nav-q.current{border-color:var(--blue);background:var(--blue2);color:var(--blue3);box-shadow:inset 0 0 0 1px var(--blue)}
.nav-q.answered:after{content:"";position:absolute;width:5px;height:5px;border-radius:50%;background:var(--green);right:4px;top:4px}
.nav-q.flagged{border-color:var(--orange);color:var(--orange)}
.nav-q.flagged:after{background:var(--orange)}
.nav-legend{display:flex;gap:12px;flex-wrap:wrap;margin-top:13px;font-size:9px;color:var(--muted)}
.legend-dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:4px;background:var(--green)}
.legend-dot.orange{background:var(--orange)}
.study-list{display:grid;gap:12px}
.study-question{padding:18px 20px}
.study-question .question-prompt{font-size:14px;margin:10px 0 13px}
.study-question .options-list{gap:6px}
.study-question .option{padding:9px 11px;font-size:12px;cursor:default}
.study-question .option:hover{border-color:var(--line);background:var(--paper)}
.search-results{display:grid;gap:10px}
.search-result{padding:16px 18px;display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.search-result h3{font-size:13px;margin:5px 0}
.search-result p{font-size:12px;color:var(--muted);margin:0;white-space:pre-line}
.empty-state{padding:35px 20px;text-align:center;color:var(--muted)}
.empty-state strong{display:block;color:var(--ink);margin-bottom:6px}
.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%,15px);background:#172641;color:#fff;padding:10px 15px;border-radius:10px;font-size:11px;opacity:0;pointer-events:none;transition:.2s;z-index:100}
.toast.show{opacity:1;transform:translate(-50%,0)}
.mobile-scrim{display:none}
@media(max-width:1150px){
  .exam-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .exam-layout{grid-template-columns:minmax(0,1fr) 245px}
  .content{padding-left:24px;padding-right:24px}
}
@media(max-width:850px){
  .appnav{position:fixed;left:0;top:0;transform:translateX(-105%);box-shadow:15px 0 45px #0002}
  body.nav-open .appnav{transform:translateX(0)}
  .mobile-scrim{display:block;position:fixed;inset:0;background:#0c172a77;z-index:45;opacity:0;pointer-events:none;transition:.2s}
  body.nav-open .mobile-scrim{opacity:1;pointer-events:auto}
  .menu-toggle{display:grid}
  .topbar{padding:0 17px}
  .content{padding:22px 17px 55px}
  .exam-layout{grid-template-columns:1fr}
  .navigator{position:static;order:-1}
  .navigator-grid{grid-template-columns:repeat(10,minmax(0,1fr));max-height:150px}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:560px){
  .topbar{height:60px;padding:0 12px}
  .breadcrumbs{display:none}
  .top-search{width:min(52vw,230px);height:36px}
  .content{padding:17px 12px 45px}
  .hero{padding:21px 18px}
  .hero-mark{width:62px;height:62px;border-radius:17px;font-size:20px}
  .hero:after{display:none}
  .stats-grid{gap:9px}
  .stat{padding:12px;gap:9px}
  .stat-icon{width:32px;height:32px}
  .stat strong{font-size:18px}
  .exam-grid{grid-template-columns:1fr}
  .pageintro{display:block}
  .pageintro .btn{margin-top:12px}
  .exam-header{padding:17px}
  .exam-header-top{display:block}
  .exam-header .header-actions{margin-top:13px}
  .question-panel{padding:17px}
  .question-prompt{font-size:14px}
  .question-footer{align-items:stretch;flex-direction:column}
  .question-footer .left,.question-footer .right{width:100%}
  .question-footer .btn{flex:1}
  .navigator{padding:13px}
  .navigator-grid{grid-template-columns:repeat(7,minmax(0,1fr))}
  .resume-card{align-items:flex-start;flex-direction:column}
  .modebar{align-items:flex-start}
  .modebar .segment{width:100%}
  .segment button{flex:1}
}
\n.divider{height:1px;background:var(--line);margin:14px 0}\n