:root{
  --bg:#eef4fb;
  --bg-soft:#f8fbff;
  --card:#ffffff;
  --text:#12263f;
  --muted:#6b7a90;
  --primary:#0b5ed7;
  --primary-dark:#084298;
  --secondary:#6c757d;
  --success:#198754;
  --success-dark:#146c43;
  --danger:#dc3545;
  --danger-dark:#b02a37;
  --warning:#ffc107;
  --info:#0dcaf0;
  --teal:#0f766e;
  --border:#d7e4f3;
  --border-soft:#e9f0f8;
  --shadow:0 18px 40px rgba(15,23,42,.10);
  --shadow-soft:0 10px 24px rgba(15,23,42,.08);
  --radius:20px;
  --radius-sm:14px;
  --radius-xs:10px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Arial,Helvetica,sans-serif;background:
  radial-gradient(circle at top right, rgba(11,94,215,.07), transparent 18%),
  radial-gradient(circle at top left, rgba(15,118,110,.06), transparent 15%),
  var(--bg);color:var(--text)}
body.exam-body{overflow-x:hidden}
a{text-decoration:none;color:inherit}
.container{max-width:1280px;margin:28px auto;padding:0 16px}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#0b5ed7 0%, #0f766e 100%);color:#fff;border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow)}
.hero::before{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;background:rgba(255,255,255,.08);border-radius:50%}
.hero::after{content:"";position:absolute;left:-30px;bottom:-30px;width:120px;height:120px;background:rgba(255,255,255,.07);border-radius:50%}
.hero h1{margin:0 0 8px;font-size:34px;font-weight:800;letter-spacing:.2px;position:relative;z-index:1}
.hero p{margin:0;color:#edf6ff;font-size:16px;position:relative;z-index:1}
.card{background:var(--card);border:1px solid var(--border-soft);border-radius:var(--radius);box-shadow:var(--shadow-soft);padding:24px}
.card h2{margin:0 0 16px;font-size:22px}
.grid-2,.grid-3,.grid-4{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.form-group{margin-bottom:16px}
label{display:block;margin-bottom:7px;font-size:14px;font-weight:700;color:#1d3557}
input,select,textarea{width:100%;padding:13px 14px;border:1px solid #ccd8e6;border-radius:12px;background:#fff;font-size:15px;color:var(--text);outline:none;transition:.2s ease}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(11,94,215,.10)}
textarea{min-height:120px;resize:vertical}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 20px;border:none;border-radius:12px;cursor:pointer;font-size:15px;font-weight:800;color:#fff;background:var(--primary);box-shadow:0 8px 18px rgba(11,94,215,.16);transition:.2s ease}
.btn:hover{transform:translateY(-1px);opacity:.97}
.btn:active{transform:translateY(0)}
.btn-block{width:100%;display:flex}
.btn-success{background:var(--success);box-shadow:0 8px 18px rgba(25,135,84,.18)}
.btn-danger{background:var(--danger);box-shadow:0 8px 18px rgba(220,53,69,.18)}
.btn-secondary{background:var(--secondary);box-shadow:0 8px 18px rgba(108,117,125,.16)}
.btn-warning{background:var(--warning);color:#2d2400;box-shadow:0 8px 18px rgba(255,193,7,.18)}
.btn-info{background:var(--info);color:#073b4c;box-shadow:0 8px 18px rgba(13,202,240,.18)}
.alert{border-radius:14px;padding:14px 16px;margin-bottom:16px;font-weight:700;line-height:1.55;border:1px solid transparent}
.alert-success{background:#eaf7ef;color:#146c43;border-color:#bfe3cb}
.alert-danger{background:#fff1f2;color:#b42318;border-color:#fecdd3}
.alert-warning{background:#fff8db;color:#7a5600;border-color:#fde68a}
.alert-info{background:#ecf5ff;color:#084298;border-color:#cfe2ff}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.stat-card{background:linear-gradient(180deg,#ffffff,#f9fbfe);border:1px solid var(--border-soft);border-radius:18px;box-shadow:var(--shadow-soft);padding:22px}
.stat-card h3{margin:0 0 8px;color:var(--muted);font-size:14px;font-weight:700}
.stat-card p{margin:0;font-size:30px;font-weight:800;color:#0f2742}
.table-wrap{overflow:auto;background:#fff;border:1px solid var(--border-soft);border-radius:18px;box-shadow:var(--shadow-soft)}
table{width:100%;border-collapse:collapse;min-width:1100px}
th,td{padding:13px 14px;border-bottom:1px solid #e8eef6;text-align:left;vertical-align:top}
th{background:#f7fbff;color:#17324f;font-weight:800;position:sticky;top:0;z-index:1}
tbody tr:hover{background:#fbfdff}
.pass-badge,.fail-badge,.pending-badge,.badge-pass,.badge-fail,.badge-pending{display:inline-flex;align-items:center;justify-content:center;min-width:78px;padding:6px 12px;border-radius:999px;font-size:13px;font-weight:800}
.pass-badge,.badge-pass{background:#d1e7dd;color:#0f5132}
.fail-badge,.badge-fail{background:#f8d7da;color:#842029}
.pending-badge,.badge-pending{background:#fff3cd;color:#664d03}
.waiting-box,.wait-card{max-width:860px;margin:40px auto;background:#fff;border:1px solid var(--border-soft);border-radius:22px;box-shadow:var(--shadow);padding:30px}
.wait-clock{margin:22px 0;padding:18px 16px;border-radius:18px;border:1px solid #d8e6f7;background:linear-gradient(180deg,#f8fbff,#eef5ff);color:var(--primary);text-align:center;font-size:34px;font-weight:800;letter-spacing:.4px}
.exam-shell{min-height:100vh;padding:12px;background:
  radial-gradient(circle at top right, rgba(15,118,110,.12), transparent 22%),
  radial-gradient(circle at top left, rgba(11,94,215,.12), transparent 20%),
  #edf3fb}
.exam-box{max-width:1320px;margin:0 auto;background:#fff;border:1px solid #dbe7f5;border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.exam-head{background:linear-gradient(135deg,#0b5ed7 0%, #0f766e 100%);color:#fff;padding:20px 24px}
.exam-head h2{margin:0 0 6px;font-size:28px}
.exam-subtitle{color:#eaf4ff;font-size:14px}
.exam-head-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.exam-head-status{display:flex;gap:10px;flex-wrap:wrap}
.exam-content{padding:24px}
.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:start}
.exam-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}
.meta-item{background:#f8fbff;border:1px solid var(--border);border-radius:14px;padding:12px}
.meta-item strong{display:block;margin-bottom:4px;font-size:13px;color:#4a5d78}
.timer{display:inline-block;background:#fff;color:#c1121f;padding:10px 15px;border-radius:12px;font-weight:800;box-shadow:0 8px 18px rgba(0,0,0,.10)}
.warning-counter{display:inline-block;background:#fff8db;color:#7a5600;padding:10px 15px;border-radius:12px;font-weight:800;box-shadow:0 8px 18px rgba(0,0,0,.10)}
.question-box{background:linear-gradient(180deg,#fbfdff,#f7fbff);border:1px solid var(--border);border-radius:18px;padding:18px;margin-bottom:18px;box-shadow:0 4px 12px rgba(15,23,42,.04)}
.question-title{font-weight:800;margin-bottom:14px;line-height:1.65;color:#0f2845}
.option{margin:9px 0}
.option label{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;margin:0;border-radius:12px;border:1px solid transparent;cursor:pointer;font-weight:500;transition:.18s ease}
.option label:hover{background:#eef6ff;border-color:#cfe0fb}
.option input[type=radio]{width:auto;margin-top:3px}
.submit-bar{margin-top:24px;text-align:center}
.big-submit-btn{min-width:240px;font-size:17px;padding:14px 24px}
.camera-panel{position:sticky;top:14px;background:#fff;border:1px solid #dbe7f5;border-radius:20px;box-shadow:var(--shadow-soft);overflow:hidden}
.camera-panel-header{background:linear-gradient(135deg,#0b5ed7,#0f766e);color:#fff;padding:14px 16px;font-size:16px;font-weight:800;text-align:center}
.camera-panel-body{padding:14px}
.camera-frame{min-height:280px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:16px;border:3px solid #e8f0fa;background:#000}
.camera-frame video{width:100%;height:280px;object-fit:cover;display:block;background:#000;transform:scaleX(-1)}
.camera-note{margin-top:12px;padding:12px;border-radius:12px;background:#eef6ff;color:#084298;border:1px solid #cfe2ff;font-size:13px;font-weight:700;line-height:1.5}
.camera-status{margin-top:10px;padding:10px 12px;border-radius:12px;text-align:center;font-size:13px;font-weight:800;background:#eaf7ef;color:#198754;border:1px solid #bde3c8}
.camera-status.off{background:#fff1f2;color:#dc3545;border-color:#fecdd3}
.camera-status.warn{background:#fff8db;color:#9a6700;border-color:#fde68a}
.overlay-lock{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;padding:20px;text-align:center;color:#fff;background:rgba(8,20,40,.94)}
.overlay-lock .inner{max-width:760px;padding:34px 28px;border-radius:24px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);box-shadow:0 20px 55px rgba(0,0,0,.28);backdrop-filter:blur(8px)}
.overlay-lock h1{margin:0 0 12px;font-size:34px}
.overlay-lock p{margin:0 0 12px;font-size:18px;color:#dbeafe}
.shield-icon{font-size:56px;margin-bottom:12px}
.pulse-btn{animation:pulseGlow 1.8s infinite}
@keyframes pulseGlow{0%{box-shadow:0 0 0 0 rgba(11,94,215,.45)}70%{box-shadow:0 0 0 18px rgba(11,94,215,0)}100%{box-shadow:0 0 0 0 rgba(11,94,215,0)}}
.print-header{text-align:center;margin-bottom:20px}
.print-header h2{margin:0 0 6px}
.center{text-align:center}
.subtext{color:#6b7a90;font-size:13px;margin-top:4px}
.no-print{display:block}
@media print{.no-print{display:none !important} body{background:#fff} .card,.table-wrap,.stat-card{box-shadow:none}}
@media (max-width:1100px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-layout{grid-template-columns:1fr}.camera-panel{position:relative;top:0}}
@media (max-width:992px){.grid-4,.exam-meta{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:768px){.grid-2,.grid-3,.grid-4,.stats,.exam-meta{grid-template-columns:1fr}.hero h1{font-size:25px}.exam-head h2{font-size:22px}.wait-clock{font-size:26px}.overlay-lock h1{font-size:26px}.overlay-lock p{font-size:16px}.camera-frame,.camera-frame video{height:240px;min-height:240px}}