:root{--navy:#0d214b;--blue:#2563eb;--blue2:#4f46e5;--ink:#172033;--muted:#667085;--line:#e6ebf3;--bg:#f4f7fc;--green:#159447;--greenbg:#ecfdf3;--orange:#f59e0b;--white:#fff;--shadow:0 12px 35px rgba(20,43,88,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:linear-gradient(180deg,#f7f9fd 0,#f3f6fb 100%);color:var(--ink)}a{color:inherit}.topbar{height:82px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(28px,calc((100vw - 1420px)/2));position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:13px}.logo{width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,#2463eb,#6549e8);color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;box-shadow:0 8px 20px #3157d533}.brand strong{display:block;font-size:19px;color:#0d1d3b}.brand small{display:block;letter-spacing:3px;color:#7b8497;margin-top:3px}.candidate-meta{display:flex;align-items:center;gap:24px}.meta-item{padding-left:20px;border-left:1px solid var(--line)}.meta-item small{display:block;color:#7b8497}.meta-item strong{display:block;margin-top:3px}.logout{color:#1d4ed8;text-decoration:none;font-weight:700}.shell{max-width:1420px;margin:28px auto 45px;padding:0 28px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px}.hero{position:relative;overflow:hidden;min-height:280px;background:linear-gradient(125deg,#fff 0%,#f6f9ff 57%,#e9f2ff 100%);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:38px}.hero:after{content:"";position:absolute;width:310px;height:310px;border-radius:50%;right:-65px;top:-80px;background:radial-gradient(circle,#c9ddff 0,#e9f2ff 55%,transparent 56%);opacity:.9}.hero-content{position:relative;z-index:2;max-width:690px}.eyebrow{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase}.hero h1{font-size:42px;line-height:1.08;margin:13px 0 14px;color:#0b1d3e}.hero h1 span{color:var(--blue)}.hero p{font-size:17px;line-height:1.7;color:#52617a;max-width:650px}.quote{margin-top:25px;background:#fff;border-left:4px solid var(--blue);border-radius:12px;padding:17px 20px;max-width:570px;font-style:italic;box-shadow:0 8px 20px #1b3f7610}.cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.test-card,.side-card,.timeline,.result-card,.login-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.test-card{padding:25px;position:relative;overflow:hidden}.test-card.completed{background:linear-gradient(145deg,#f3fff7,#fff 48%)}.card-head{display:flex;gap:15px;align-items:flex-start}.test-icon{width:54px;height:54px;border-radius:16px;background:#eaf1ff;color:var(--blue);display:grid;place-items:center;font-size:25px;font-weight:800}.completed .test-icon{background:#dcfce7;color:var(--green)}.card-head h2{font-size:21px;margin:2px 0 5px}.card-head p{margin:0;color:var(--muted);font-size:14px;line-height:1.45}.badge{margin-left:auto;border-radius:999px;padding:8px 11px;font-size:12px;font-weight:800;background:#eaf1ff;color:#2457c5;white-space:nowrap}.badge.done{background:var(--greenbg);color:var(--green)}.progress{height:8px;background:#edf1f7;border-radius:99px;margin:22px 0 17px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,#2f67ee,#5d55e8);border-radius:99px}.completed .progress span{background:linear-gradient(90deg,#22c55e,#57cc73)}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:17px}.stat{background:#f7f9fc;border-radius:12px;padding:12px}.stat small{display:block;color:#7b8497;font-size:11px}.stat strong{display:block;margin-top:5px;font-size:15px}.btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:48px;border-radius:12px;background:linear-gradient(90deg,#2463eb,#3157d5);color:#fff;text-decoration:none;font-weight:800;border:0;cursor:pointer;font-size:15px;box-shadow:0 8px 18px #3157d526}.btn.secondary{background:#f2f6ff;color:#1e50c7;box-shadow:none;border:1px solid #dce7ff}.side{display:flex;flex-direction:column;gap:18px}.side-card{padding:23px}.side-card h3{margin:0 0 18px;font-size:17px}.tip{display:flex;gap:12px;margin:14px 0;color:#536179;font-size:13px;line-height:1.55}.tip b{flex:0 0 30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#edf3ff;color:#2563eb}.support{background:linear-gradient(145deg,#fff9ed,#fff)}.support .btn{background:#fff;color:#138a45;border:1px solid #bce9cb;box-shadow:none}.timeline{margin-top:18px;padding:22px 25px}.timeline h3{margin:0 0 18px}.steps{display:flex;align-items:flex-start}.step{flex:1;position:relative;display:flex;gap:10px;align-items:center}.step:not(:last-child):after{content:"";height:2px;background:#e5eaf2;position:absolute;left:43px;right:8px;top:18px}.step-no{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#e7ecf4;color:#657086;font-weight:800;z-index:1}.step.active .step-no,.step.done .step-no{background:var(--blue);color:#fff}.step-text strong{display:block;font-size:13px}.step-text small{display:block;color:#7a8497;margin-top:3px}.result-card{margin-top:18px;padding:24px}.result-card h2{margin:0 0 10px}.result-score{font-size:34px;font-weight:800;color:var(--blue)}.result-card p{color:#5c687e}.footer{max-width:1420px;margin:0 auto;padding:24px 28px 35px;color:#7b8497;font-size:12px;display:flex;justify-content:space-between}.test-wrap{max-width:1000px;margin:30px auto 60px;padding:0 24px}.test-title{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px 28px;box-shadow:var(--shadow);margin-bottom:18px}.test-title h1{margin:0 0 8px;font-size:30px}.test-title p{margin:0;color:var(--muted)}.question{background:#fff;border:1px solid var(--line);padding:24px 26px;border-radius:17px;margin:14px 0;box-shadow:0 7px 22px rgba(20,43,88,.05)}.question strong{display:block;line-height:1.55;margin-bottom:14px}.option{display:flex;align-items:flex-start;gap:10px;padding:13px 14px;border:1px solid #dfe5ef;border-radius:11px;margin:9px 0;cursor:pointer;line-height:1.45;transition:.15s}.option:hover{border-color:#9eb8fa;background:#f7faff}.option input{margin-top:3px;accent-color:var(--blue)}.submit-row{position:sticky;bottom:12px;background:#ffffffed;border:1px solid var(--line);border-radius:15px;padding:12px;box-shadow:var(--shadow);margin-top:18px}.error{background:#fff1f0;color:#b42318;border:1px solid #ffd2cf;padding:12px 14px;border-radius:10px}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 15% 15%,#e7f0ff 0,transparent 35%),linear-gradient(135deg,#f7f9fd,#eef3fb)}.login-card{width:min(470px,100%);padding:34px}.login-brand{justify-content:center;margin-bottom:28px}.login-card h1{text-align:center;margin:0 0 8px}.login-card>p{text-align:center;color:var(--muted);margin-bottom:26px}.field{margin:15px 0}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:7px}.field input{width:100%;padding:13px 14px;border:1px solid #d8deea;border-radius:10px;font-size:15px;outline:none}.field input:focus{border-color:#7ca1ff;box-shadow:0 0 0 3px #dbe7ff}.login-foot{text-align:center;color:#8992a3;font-size:12px;margin-top:20px}
@media(max-width:980px){.layout{grid-template-columns:1fr}.side{display:grid;grid-template-columns:1fr 1fr}.candidate-meta .meta-item:first-child{display:none}.hero{min-height:auto}.cards{grid-template-columns:1fr}.steps{display:grid;gap:13px}.step:after{display:none}}@media(max-width:650px){.topbar{height:auto;padding:14px 18px}.brand small,.candidate-meta .meta-item{display:none}.shell{padding:0 15px;margin-top:15px}.hero{padding:25px}.hero h1{font-size:32px}.side{grid-template-columns:1fr}.footer{padding:20px;display:block}.footer span{display:block;margin-top:6px}.test-wrap{padding:0 14px}.question{padding:19px}.login-card{padding:27px 22px}}

/* V2.68 One-question exam UI */
.exam-layout{max-width:1460px;display:grid;grid-template-columns:260px minmax(0,1fr) 280px;gap:18px;align-items:start}.exam-main{min-width:0}.exam-nav,.exam-help{position:sticky;top:102px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.exam-nav h3,.exam-help h3{margin:0 0 14px;color:#10264a}.exam-progress{height:7px;background:#e8edf5;border-radius:99px;overflow:hidden}.exam-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,#2463eb,#5a54e8);border-radius:99px;transition:.2s}.exam-nav>p{font-size:12px;color:#718096}.question-numbers{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:17px 0}.question-numbers button{height:36px;border:1px solid #e1e7f0;background:#f6f8fc;border-radius:9px;color:#52617a;font-weight:800;cursor:pointer}.question-numbers button.current{background:#2563eb;color:#fff;border-color:#2563eb}.question-numbers button.answered:not(.current){background:#eaf9f0;color:#137448;border-color:#ccebd9}.legend{display:grid;gap:7px;color:#7a8799;font-size:10px}.exam-question{margin:0;min-height:390px;padding:30px}.exam-question>strong{font-size:18px;color:#10264a;margin-bottom:22px}.exam-question .option{padding:15px 16px;margin:10px 0}.exam-question .option:has(input:checked){border-color:#6f98f5;background:#eef4ff;box-shadow:0 0 0 2px #dce8ff}.question-controls{display:flex;justify-content:space-between;gap:12px;margin-top:14px}.question-controls .btn{width:auto;min-width:145px}.exam-help ol{padding-left:23px;margin:0;color:#56657d}.exam-help li{padding:7px 0;line-height:1.5;font-size:12px}.submit-row{position:static}.submit-row .btn{max-width:280px;margin-left:auto}.test-title{position:relative}.test-title #timerBox{position:absolute;right:24px;top:20px;margin:0!important}@media(max-width:1100px){.exam-layout{grid-template-columns:220px minmax(0,1fr)}.exam-help{display:none}}@media(max-width:760px){.exam-layout{display:block}.exam-nav{position:static;margin-bottom:14px}.question-numbers{grid-template-columns:repeat(8,1fr)}.exam-question{min-height:auto;padding:20px}.test-title #timerBox{position:static;margin-top:16px!important}.question-controls .btn{min-width:0}.exam-help{display:none}}