:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#182844;background:#f4f6fa;font-synthesis:none;font-size:16px;--blue:#2348b7;--ink:#182844;--muted:#59677c;--line:#dce3ee;--green:#166748;--red:#a32636}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.42}button,a,input{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #f3a938;outline-offset:4px}button{color:inherit}a{color:var(--blue)}.topbar{background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1200px;margin:auto;padding:20px 32px;display:flex;justify-content:space-between;align-items:center;gap:18px}.brand{border:0;background:none;display:flex;align-items:center;gap:10px;font-size:25px;font-weight:760;padding:0;letter-spacing:-1px}.brand-light{font-weight:400}.brand-mark{display:grid;place-items:center;background:#1a3592;color:white;width:42px;height:42px;border-radius:12px;font:32px Georgia,serif}.header-meta{display:flex;gap:22px;align-items:center;font-size:12px;font-weight:700;letter-spacing:1.4px}.pill{background:#edf2ff;color:#254395;border-radius:30px;padding:9px 13px;font-size:12px;letter-spacing:.5px}main{max-width:1200px;margin:auto;padding:48px 32px 64px;min-height:calc(100vh - 185px)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3.6vw,42px);line-height:1.15;letter-spacing:-1.3px;margin-bottom:13px}h2{font-size:25px;line-height:1.3;letter-spacing:-.5px}p{line-height:1.65}.eyebrow{display:block;font-size:12px;font-weight:750;letter-spacing:1.6px;color:var(--blue);margin-bottom:14px}.intro{display:flex;justify-content:space-between;gap:30px;align-items:center;margin-bottom:36px}.intro p{color:var(--muted);margin:0;font-size:17px}.summary{display:flex;border-left:1px solid var(--line);padding-left:35px;gap:28px}.summary strong{display:block;font-size:30px;letter-spacing:-1px}.summary span{color:var(--muted);font-size:13px;white-space:nowrap}.section-line{display:flex;align-items:center;justify-content:space-between;margin:15px 0 20px}.section-line h2{font-size:17px;margin:0}.section-line 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12px;gap:12px;min-height:67px;border-radius:5px}.exam-button:hover{background:#f0f4ff}.exam-number{font-size:13px;font-weight:700;flex-shrink:0;color:var(--accent);background:var(--tint);border-radius:6px;width:29px;height:31px;display:grid;place-items:center}.exam-text{font-size:14px;line-height:1.35;font-weight:570}.exam-text small{display:block;color:var(--muted);font-size:12px;margin-top:3px;font-weight:400}.study-note{margin-top:26px;border-left:3px solid #8b9ab8;padding:0 0 0 16px;font-size:14px;color:var(--muted);max-width:790px;line-height:1.65}.study-note strong{color:var(--ink)}footer{max-width:1200px;margin:0 auto;padding:24px 32px;border-top:1px solid var(--line);display:flex;gap:24px;justify-content:space-between;font-size:12px;color:var(--muted);line-height:1.5}footer span:first-child{white-space:nowrap;font-weight:650}.breadcrumbs{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:26px;color:var(--muted);font-size:14px}.text-button{background:none;border:0;padding:0;font-size:14px;color:var(--blue);text-decoration:underline;text-underline-offset:3px}.exam-heading{display:flex;justify-content:space-between;gap:20px;margin-bottom:26px}.exam-heading h1{font-size:30px;letter-spacing:-.7px;margin-bottom:8px}.exam-heading p{font-size:15px;color:var(--muted);margin:0}.mode-label{font-size:12px;font-weight:700;background:#e7edff;color:#2845a1;border-radius:6px;padding:8px 10px;align-self:flex-start;white-space:nowrap}.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 267px;gap:26px;align-items:start}.question-card{background:white;border:1px solid var(--line);border-radius:16px;padding:32px}.question-top{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:22px;color:var(--muted);font-size:13px}.question-top strong{color:var(--blue);font-size:14px}.question-card h2{font-size:21px;font-weight:600;line-height:1.55;letter-spacing:-.2px;margin:0 0 26px}.options{display:grid;gap:11px}.option{display:flex;align-items:flex-start;gap:14px;border:1px solid var(--line);padding:17px;border-radius:10px;cursor:pointer;line-height:1.5;position:relative}.option:hover{border-color:#97a9da;background:#f7f9ff}.option.selected{border-color:var(--blue);background:#eef3ff;box-shadow:inset 0 0 0 1px var(--blue)}.option input{position:absolute;opacity:0;inset:0;width:100%;height:100%;cursor:pointer;margin:0}.option:has(input:focus-visible){outline:3px solid #f3a938;outline-offset:3px}.option-key{width:28px;min-width:28px;height:28px;display:grid;place-items:center;font-size:13px;font-weight:700;background:#f0f3f8;border:1px solid #d7dfeb;border-radius:6px}.selected .option-key{background:var(--blue);color:#fff;border-color:var(--blue)}.option-text{padding-top:2px}.question-actions{display:flex;justify-content:space-between;gap:12px;margin-top:28px}.button{border:1px solid transparent;border-radius:9px;padding:12px 19px;min-height:46px;font-weight:650;font-size:14px;line-height:1.35}.primary{color:#fff;background:var(--blue)}.primary:hover{background:#173996}.secondary{background:#fff;border-color:#cdd7e7;color:#233759}.secondary:hover{background:#f0f3f8}.question-extra{margin-top:15px;min-height:18px;text-align:right}.navigator{padding:24px;background:#eaf0fa;border-radius:16px;border:1px solid #dce5f2}.navigator h3{font-size:16px;margin:0 0 7px}.navigator p{font-size:13px;color:var(--muted);margin-bottom:12px}.navigator progress{display:block;width:100%;height:6px;border:0;border-radius:5px;margin-bottom:22px;accent-color:var(--blue)}progress::-webkit-progress-bar{background:#d5deed;border-radius:5px}progress::-webkit-progress-value{background:var(--blue);border-radius:5px}.question-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.jump{background:white;border:1px solid #cbd6e7;border-radius:7px;aspect-ratio:1;font-size:13px;font-weight:600;padding:3px}.jump.answered{background:#d2dffc;border-color:#becfee;color:#1a3c91}.jump.current{box-shadow:0 0 0 2px var(--blue);border-color:var(--blue)}.legend{display:flex;gap:12px;margin:15px 0 24px;font-size:12px;color:var(--muted);align-items:center}.legend i{display:inline-block;width:9px;height:9px;border-radius:2px;background:#c6d7fc;margin-right:4px;border:1px solid #b0c4ed}.navigator>.button{width:100%}.navigator .small-note{font-size:12px;line-height:1.5;margin:12px 0 0}.result-banner{display:grid;grid-template-columns:160px minmax(0,1fr) auto;align-items:center;gap:30px;background:#152c76;color:white;border-radius:16px;padding:32px;margin-bottom:30px}.score{width:140px;height:140px;border-radius:50%;background:conic-gradient(#70dac4 calc(var(--score)*1%),#354d94 0);padding:8px;display:grid;place-items:center}.score-inner{background:#152c76;width:124px;height:124px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center}.score strong{font-size:37px;line-height:1.1}.score span{font-size:13px;color:#d5dffa;margin-top:5px}.result-banner h2{margin-bottom:8px;font-size:27px}.result-banner p{color:#d8e1fb;margin:0 0 15px;font-size:15px}.stats{display:flex;gap:24px;font-size:14px;flex-wrap:wrap}.stats strong{font-size:19px;margin-right:5px}.result-actions{display:flex;flex-direction:column;gap:10px;max-width:195px}.result-actions .secondary{background:transparent;border-color:#7389c2;color:#fff}.result-actions .primary{color:#142b71;background:white}.review-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:19px}.review-header h2{font-size:21px;margin:0}.toggle-group{display:flex;gap:5px;padding:4px;background:#e6ebf4;border-radius:8px}.toggle-group button{padding:9px 13px;border:0;border-radius:6px;background:none;font-size:13px;font-weight:600}.toggle-group .active{background:white;box-shadow:0 1px 4px #14285215}.review-card{border:1px solid var(--line);border-radius:12px;background:white;margin-bottom:17px;padding:24px}.review-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:16px}.review-top>span:first-child{font-size:13px;color:var(--muted)}.status{font-size:12px;padding:6px 10px;border-radius:30px;font-weight:650}.status.correct{color:var(--green);background:#e2f4ec}.status.wrong{color:var(--red);background:#fce9ed}.status.blank{color:#725321;background:#fff2d9}.review-card h3{font-size:17px;line-height:1.6;font-weight:600;margin:0 0 18px}.review-options{display:grid;gap:8px}.review-option{display:flex;gap:10px;padding:10px 13px;border:1px solid #e7ecf3;border-radius:7px;font-size:14px;line-height:1.6;align-items:flex-start;flex-wrap:wrap}.review-option .answer-text{flex:1;min-width:170px}.review-option.correct{border-color:#8fc6ae;background:#eff9f3}.review-option.wrong{border-color:#e0a1ac;background:#fff3f5}.answer-tag{font-size:12px;font-weight:650;color:var(--green)}.wrong .answer-tag{color:var(--red)}.empty{padding:40px;border:1px dashed #bbc8de;border-radius:12px;color:var(--muted);text-align:center}.source-note{font-size:12px;color:var(--muted);margin:14px 0 0}.dialog-content{padding:30px}dialog{border:0;border-radius:16px;max-width:500px;width:calc(100% - 36px);padding:0;box-shadow:0 25px 90px #10204144;color:var(--ink)}dialog::backdrop{background:#101f48a6}dialog h2{font-size:25px}dialog p{color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap;margin-top:25px}
@media(min-width:1050px){.subjects .subject-card:nth-child(4),.subjects .subject-card:nth-child(5){grid-column:span 1}}
@media(max-width:1000px){.subjects{grid-template-columns:repeat(2,minmax(0,1fr))}.summary{gap:20px;padding-left:24px}.exam-layout{grid-template-columns:minmax(0,1fr) 225px;gap:18px}.question-card{padding:24px}.navigator{padding:18px}.result-banner{grid-template-columns:145px 1fr}.result-actions{grid-column:1/-1;flex-direction:row;max-width:none}.subject-head{min-height:180px}}
@media(max-width:700px){.header-inner{padding:16px 20px}.header-meta>span:first-child{display:none}.brand{font-size:22px}.brand-mark{width:36px;height:36px;font-size:28px}main{padding:30px 18px 40px}.intro{align-items:flex-start;flex-direction:column;gap:22px;margin-bottom:28px}.intro p{font-size:16px}.summary{border:0;padding:0;gap:28px}.summary strong{font-size:25px}.summary>div{display:flex;gap:8px;align-items:baseline}.section-line span{font-size:12px}.subjects{grid-template-columns:1fr;gap:18px}.subject-head{min-height:0;padding:20px}.subject-top{margin-bottom:10px}.subject-head h2{font-size:23px}.exam-button{min-height:59px}.exam-heading{flex-direction:column;gap:12px}.exam-heading h1{font-size:25px}.exam-layout{grid-template-columns:1fr}.navigator{order:2}.question-grid{grid-template-columns:repeat(10,1fr);gap:8px}.jump{min-height:30px}.question-card{padding:21px 18px}.question-card h2{font-size:19px}.option{padding:14px 12px;gap:10px}.option-text{font-size:16px}.question-actions .button{padding:12px 14px}.result-banner{padding:25px 20px;gap:22px;grid-template-columns:1fr;text-align:center}.score{margin:auto}.stats{justify-content:center;gap:16px}.result-actions{grid-column:auto;justify-content:center;flex-wrap:wrap}.result-banner h2{font-size:24px}.review-header{flex-direction:column;align-items:flex-start;gap:13px}.review-card{padding:20px 16px}.review-option .answer-text{min-width:140px}.question-top{font-size:12px}.mode-label{white-space:normal}footer{padding:20px;flex-direction:column;gap:6px}.breadcrumbs{font-size:13px}.navigator .button{margin-top:3px}.legend{margin-bottom:16px}}
@media(max-width:380px){.question-grid{grid-template-columns:repeat(5,1fr)}.summary{gap:17px}.summary>div{display:block}.header-meta .pill{font-size:11px;padding:8px}.stats{gap:10px}}
@media(prefers-reduced-motion:no-preference){button,.option{transition:background .14s,border-color .14s}}
@media print{.topbar,.breadcrumbs,.result-actions,.review-header .toggle-group,footer{display:none}.review-card{break-inside:avoid}.result-banner{color:#182844;background:#eef2fa}.result-banner p{color:#182844}}

/* Single-exam edition, preserving the original visual identity. */
.exam-text{font-size:16px}.exam-text small{font-size:14px}.subject-head{min-height:205px}.section-line{gap:16px;flex-wrap:wrap}@media(max-width:700px){.subject-head{min-height:0}}

.verify-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:22px}.keyboard-hint{font-size:14px;color:#495a74}.answer-feedback{margin:20px 0;padding:22px;border:1px solid;border-left-width:4px;border-radius:12px;line-height:1.65}.feedback-correct{background:#edf8f3;border-color:#26734f}.feedback-wrong{background:#fff4ee;border-color:#ad4b22}.answer-feedback h3{font-size:20px;margin:0 0 12px}.answer-feedback h4,.review-explanation h4{font-size:16px;margin:14px 0 6px}.answer-feedback p,.review-explanation p{font-size:16px;margin:6px 0 14px}.answer-feedback details{margin-top:16px}.answer-feedback summary{cursor:pointer;font-weight:600;font-size:15px}.alternative-explanation{border-top:1px solid #ccd3db;margin-top:14px;padding-top:2px}.alternative-explanation h4 span{display:block;font-size:14px}.explanation-sources{font-size:14px;color:#465571;margin-top:18px;overflow-wrap:anywhere}.explanation-sources a{color:#244bb8;text-decoration:underline}.option.is-correct{border-color:#26734f;background:#edf8f3}.option.is-wrong{border-color:#ad4b22;background:#fff1e9}.option:has(input:disabled){cursor:default}.review-explanation{background:#f2f5fa;padding:18px;border-radius:10px;margin-top:18px}.ai-note{font-size:14px;line-height:1.5;max-width:600px;margin:0}.button:disabled{cursor:default;opacity:.55}footer{flex-wrap:wrap}[hidden]{display:none!important}@media(max-width:700px){.answer-feedback{padding:17px}.verify-row .button{width:100%}}

.mode-picker{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:30px}.mode-choice{text-align:left;background:white;border:1px solid var(--line);border-radius:12px;padding:20px;display:grid;gap:8px}.mode-choice strong{font-size:18px}.mode-choice span{font-size:14px;line-height:1.5;color:var(--muted)}.mode-choice.active{border:2px solid var(--blue);padding:19px;background:#edf2ff}.mode-status{display:flex;flex-direction:column;align-items:flex-end;gap:12px}.timer-box{display:flex;align-items:center;gap:14px;background:white;border:1px solid var(--line);border-radius:10px;padding:12px 16px}.timer-box span{font-size:14px;color:var(--muted)}#exam-timer{font-size:26px;font-variant-numeric:tabular-nums;color:var(--blue)}#exam-timer.time-low{color:var(--red)}.timeout-note{background:#fff2d9;padding:12px;border-radius:8px}.question-card>.keyboard-hint{margin:16px 0 0;font-size:13px}.keyboard-hint[hidden]{display:none}@media(max-width:700px){.mode-picker{grid-template-columns:1fr}.mode-status{align-items:flex-start}.timer-box{padding:10px 14px}}

.question-actions{scroll-margin-block:24px}
.audio-controls{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:0 0 22px;font-size:14px}.audio-toggle{display:inline-flex;align-items:center;gap:8px;min-height:44px;cursor:pointer;font-weight:600}.audio-toggle input{width:18px;height:18px;accent-color:var(--blue);margin:0}.audio-status{flex-basis:100%;font-size:14px;line-height:1.5;color:var(--muted)}.audio-controls .text-button{min-height:44px}

.audio-note{font-size:14px;color:var(--muted)}

.jump.incorrect{background:#fce9ed;border-color:#a32636;color:#871d2b}.legend{flex-wrap:wrap}.legend i.incorrect{background:#fce9ed;border-color:#a32636}