:root{
  --bg:#f5f7fb;
  --card:#ffffff;
  --text:#1f2937;
  --muted:#667085;
  --line:#d9e1ea;
  --primary:#2667a8;
  --primary-dark:#174e83;
  --danger:#b42318;
  --ok:#067647;
  --orange:#b54708;
  --shadow:0 10px 28px rgba(16,24,40,.08);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.45 Arial, Helvetica, sans-serif}
a{color:var(--primary);text-decoration:none}
.topbar{height:68px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:110px;height:auto}
.brand strong{display:block;font-size:18px}
.brand span{color:var(--muted);font-size:12px}
.topbar nav{display:flex;align-items:center;gap:18px}
.container{max-width:1280px;margin:28px auto;padding:0 20px}
.footer{text-align:center;color:var(--muted);font-size:12px;padding:28px}
.card,.login-card{background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:26px;margin-bottom:22px}
.login-card{max-width:520px;margin:70px auto;text-align:left}
.login-logo{display:block;width:210px;margin:0 auto 20px}
.narrow{max-width:760px;margin-left:auto;margin-right:auto}
h1{font-size:28px;margin:0 0 16px}
h2{font-size:20px;margin:12px 0}
.muted{color:var(--muted)}
.form{display:grid;gap:14px}
.form.wide{max-width:1000px}
label{display:grid;gap:6px;font-weight:600}
label small{font-weight:400;color:var(--muted)}
input,select,textarea{width:100%;border:1px solid #bfc9d4;border-radius:6px;padding:10px 12px;background:#fff;font:inherit;color:var(--text)}
textarea{resize:vertical}
input[type="checkbox"],input[type="radio"]{width:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #b7c4d4;background:#fff;color:#1f2937;border-radius:7px;padding:9px 14px;font-weight:700;cursor:pointer}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark)}
.btn.danger{background:#fff;color:var(--danger);border-color:#f3b4ae}
.btn.big{padding:12px 18px;font-size:16px}
.btn.small{padding:5px 8px;font-size:12px}
.inline{display:inline}
.flash{padding:12px 14px;border-radius:8px;margin-bottom:14px}
.flash.success{background:#ecfdf3;color:#05603a;border:1px solid #abefc6}
.flash.error{background:#fef3f2;color:#b42318;border:1px solid #fecdca}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.tabs a{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 14px;color:#344054;font-weight:700}
.tabs a.active{background:var(--primary);border-color:var(--primary);color:#fff}
.grid-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;box-shadow:var(--shadow)}
.stat strong{display:block;font-size:34px}
.stat span{color:var(--muted)}
.two-col{display:grid;grid-template-columns:360px 1fr;gap:20px;align-items:start}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
th{background:#f8fafc;font-size:13px}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:14px}
.filters{display:flex;gap:10px;margin:12px 0 18px}
.filters input{max-width:420px}
.pagination{display:flex;gap:6px;margin-top:18px}
.pagination a{padding:7px 10px;border:1px solid var(--line);border-radius:6px;background:#fff;color:#344054}
.pagination a.active{background:var(--primary);color:#fff}
.summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}
.summary-grid div{border:1px solid var(--line);border-radius:8px;padding:14px;background:#f8fafc}
.summary-grid strong{display:block;font-size:12px;text-transform:uppercase;color:var(--muted)}
.summary-grid span{display:block;font-size:18px;font-weight:700;margin-top:3px}
.rules li{margin-bottom:9px}
.exam-head{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 22px;box-shadow:var(--shadow);margin-bottom:20px}
.timer{font-size:28px;font-weight:800;border:2px solid #ef6820;border-radius:8px;padding:8px 14px;background:#fff}
.timer.urgent{color:#b42318;border-color:#b42318;background:#fef3f2}
.question-card{background:#dff2f6;border:1px solid #c5e6ed;border-radius:9px;margin-bottom:18px;padding:22px}
.question-card h2{font-size:18px;font-weight:700;margin:8px 0 18px}
.qmeta{font-weight:700;color:#344054;font-size:13px;text-transform:uppercase}
.answer{display:flex;grid-template-columns:none;align-items:flex-start;gap:10px;background:#fff;border:1px solid #c7d7e3;border-radius:8px;padding:12px;margin:8px 0;font-weight:400;cursor:pointer}
.answer:hover{border-color:var(--primary)}
.answer input{margin-top:3px}
.exam-actions{text-align:right;margin:24px 0}
.qimage{display:block;max-width:760px;max-height:360px;border:1px solid var(--line);border-radius:8px;background:#fff;margin:12px 0}
.qthumb{max-width:320px;max-height:180px;border:1px solid var(--line);border-radius:8px}
.image-missing{background:#fff;border:1px dashed #98a2b3;border-radius:8px;padding:18px;color:#667085;margin:12px 0;text-align:center}
.score-box{display:inline-flex;align-items:center;justify-content:center;font-size:42px;font-weight:900;border-radius:12px;padding:20px 28px;margin:10px 0 20px;border:2px solid}
.score-red{color:#b42318;background:#fef3f2;border-color:#f97066}
.score-orange{color:#b54708;background:#fffaeb;border-color:#fdb022}
.score-green{color:#067647;background:#ecfdf3;border-color:#32d583}
.result-list{display:grid;gap:10px}
.result-item{border:1px solid var(--line);border-radius:8px;padding:12px;background:#fff}
.result-item span{float:right;font-weight:800;text-transform:uppercase}
.result-item.ok{border-color:#abefc6;background:#f6fef9}
.result-item.bad{border-color:#fecdca;background:#fffbfa}
.result-item.ok span{color:#067647}
.result-item.bad span{color:#b42318}
code{background:#f2f4f7;border:1px solid #eaecf0;border-radius:4px;padding:2px 5px}
@media(max-width:900px){
  .two-col,.grid-cards,.summary-grid{grid-template-columns:1fr}
  .filters{display:grid}
  .topbar{height:auto;padding:14px;align-items:flex-start}
  .topbar nav{flex-wrap:wrap;justify-content:flex-end}
  .brand img{width:92px}
}

.import-modes{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:#f9fafb}
.import-modes legend{font-weight:800;color:var(--ink);padding:0 6px}
.import-modes label{display:block;margin:10px 0;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fff}
.import-modes small{display:block;margin-top:4px;color:var(--muted);line-height:1.35}