:root{--bg:#07111f;--panel:#101d33;--panel2:#0b1220;--line:#2a3a55;--text:#e5e7eb;--muted:#94a3b8;--blue:#38bdf8;--green:#22c55e;--red:#ef4444;--orange:#f59e0b}
*{box-sizing:border-box}body{margin:0;min-height:100%;font-family:system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;background:linear-gradient(135deg,#07111f,#10213c);color:var(--text)}
header{position:sticky;top:0;z-index:9;background:rgba(7,17,31,.94);border-bottom:1px solid var(--line);padding:14px 18px;backdrop-filter:blur(8px)}
.wrap{max-width:1360px;margin:auto}.head{display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;gap:12px;align-items:center}.logo{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#38bdf8,#22c55e);display:grid;place-items:center;font-weight:900;color:#06111f}h1{font-size:19px;margin:0}.sub{font-size:12px;color:var(--muted);margin-top:2px}
button,input,select,textarea{font-family:inherit}button{border:1px solid #0284c7;background:#0ea5e9;color:white;border-radius:10px;padding:9px 12px;font-weight:700;cursor:pointer}button.secondary{background:#1e293b;border-color:#475569}button.ok{background:#16a34a;border-color:#15803d}button.warn{background:#d97706;border-color:#b45309}button.danger{background:#dc2626;border-color:#b91c1c}button.small{padding:6px 8px;font-size:12px}
.card{background:rgba(16,29,51,.94);border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:0 12px 35px rgba(0,0,0,.20)}h2{font-size:16px;margin:0 0 10px}h3{font-size:14px;margin:14px 0 8px;color:#bae6fd}
label{display:block;margin:10px 0 5px;font-size:12px;color:#cbd5e1}input,select,textarea{width:100%;border:1px solid #334155;background:#07111f;color:var(--text);border-radius:10px;padding:9px 10px;font-size:14px}textarea{min-height:82px;resize:vertical;line-height:1.5}
.row{display:grid;grid-template-columns:1fr 1fr;gap:9px}.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:9px}.row4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:9px}@media(max-width:650px){.row,.row3,.row4{grid-template-columns:1fr}}
.hint{color:var(--muted);font-size:12px;line-height:1.45;margin-top:7px}hr{border:0;border-top:1px solid var(--line);margin:14px 0}.list{display:grid;gap:8px}.item{border:1px solid #26354d;background:#07111f;border-radius:12px;padding:10px}.item-title{font-weight:800}.item-sub{font-size:12px;color:var(--muted);margin-top:3px}
video,canvas{width:100%;display:block;background:#050816;border-radius:14px;border:1px solid var(--line)}.tools{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}@media(max-width:800px){.tools{grid-template-columns:1fr 1fr}}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.stat{background:#07111f;border:1px solid #26354d;border-radius:12px;padding:10px}.num{font-size:24px;font-weight:900}.small{font-size:12px;color:var(--muted)}
.tablebox{max-height:430px;overflow:auto;border:1px solid #26354d;border-radius:12px}table{width:100%;border-collapse:collapse;font-size:12px}th,td{padding:7px;border-bottom:1px solid #26354d;text-align:left}th{color:#bae6fd;background:#101d33;position:sticky;top:0}.correct{color:var(--green);font-weight:800}.wrong{color:var(--red);font-weight:800}.amb{color:var(--orange);font-weight:800}.toast{position:fixed;right:16px;bottom:16px;background:#062016;border:1px solid #15803d;color:#dcfce7;border-radius:12px;padding:12px 14px;z-index:99;box-shadow:0 15px 40px rgba(0,0,0,.35);display:none;max-width:330px}
.login{max-width:430px;margin:30px auto}.codebox{font-size:32px;letter-spacing:8px;font-weight:900;color:#bae6fd;text-align:center;background:#07111f;border:1px dashed #38bdf8;border-radius:14px;padding:14px;margin:10px 0}
.print-only{display:none}@media print{body{background:white;color:black}header,main,.toast,.no-print{display:none!important}.print-only{display:block!important}@page{size:A4;margin:8mm}}
.sheet{width:194mm;min-height:281mm;margin:0 auto;background:white;color:black;padding:8mm;font-family:Tahoma,sans-serif;position:relative}.marker{width:10mm;height:10mm;background:#000;position:absolute}.marker.tl{left:7mm;top:7mm}.marker.tr{right:7mm;top:7mm}.marker.bl{left:7mm;bottom:7mm}.marker.br{right:7mm;bottom:7mm}.sheet-title{text-align:center;font-size:20px;font-weight:900;margin:2mm 16mm 3mm}.info-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:5mm;margin:0 13mm 4mm}.line{border-bottom:1px solid #111;height:8mm}.answer-area{margin:0 12mm;display:grid;grid-template-columns:1fr 1fr;column-gap:8mm}.qrow{display:flex;align-items:center;gap:2mm;height:7.3mm;font-size:11px;break-inside:avoid}.qno{width:8mm;text-align:right;font-weight:700}.bubble{width:6.2mm;height:6.2mm;border:1.4px solid #111;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:8px}.sheet-foot{position:absolute;left:20mm;right:20mm;bottom:8mm;font-size:9px;text-align:center;color:#333}