:root{color-scheme:light;--bg:#fafafa;--panel:#fff;--line:#e5e5e5;--vien-dam:#d4d4d4;--ink:#262626;--muted:#737373;--tieu-de:#404040;--accent:#c02b30;--accent-hover:#c82931;--accent-manh:#b21400;--accent-ink:#fff;--accent-nhat:#fff1f1;--vien-hong:#f9d4d2;--do-thanh-tren:#c82931;--do-vach:#c02b30;--warn:#b4600f;--ok:#2f7d5c;--loi:#b21400;--bong:0 2px 15px 0 rgba(0,0,0,.08);--bong-day:0 4px 25px 0 rgba(0,0,0,.12);--bo-goc:12px;--bo-nut:6px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 var(--font-chinh),ui-sans-serif,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent)}.wrap{max-width:940px;margin:0 auto;padding:24px 20px 64px}header.top{position:-webkit-sticky;position:sticky;top:0;z-index:50}header.top .inner{max-width:940px;margin:0 auto;padding:0 20px}header.top .lien-he{background:var(--do-thanh-tren);color:#fff;padding:8px 0;font-size:14px}header.top .lien-he .inner{display:flex;align-items:center;gap:24px}header.top .lien-he span{display:inline-flex;align-items:center;gap:8px}header.top .lien-he svg{width:16px;height:16px;color:var(--vien-hong);flex:none}header.top .lien-he i{width:1px;height:16px;background:var(--do-vach);flex:none}header.top .thanh{background:var(--panel);border-bottom:1px solid var(--line);box-shadow:var(--bong-day)}header.top .thanh .inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}header.top .logo{width:45px;height:45px;flex:none;background:url(/thekey-logo.webp) 50%/contain no-repeat}header.top nav{display:flex;align-items:center;gap:4px}header.top nav a{display:inline-flex;align-items:center;height:36px;padding:0 12px;border-radius:var(--bo-nut);font-size:14px;font-weight:500;color:var(--ink);text-decoration:none;white-space:nowrap;transition:background .2s,color .2s}header.top nav a:hover{background:var(--accent-nhat);color:var(--tieu-de)}header.top nav a.dang-mo{background:var(--accent-nhat);color:var(--accent-manh);font-weight:600}header.top .phai{display:flex;align-items:center;gap:12px}header.top .quay-lai{font-size:14px;color:var(--muted);text-decoration:none;white-space:nowrap}header.top .quay-lai:hover{color:var(--accent)}.logo-lon{width:64px;height:64px;margin:0 0 14px;background:url(/thekey-logo.webp) 50%/contain no-repeat}h1{font-size:22px;margin:0 0 4px}h1,h2{color:var(--tieu-de);font-weight:700;letter-spacing:-.025em}h2{font-size:16px;margin:28px 0 10px}p.sub{color:var(--muted);margin:0 0 22px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--bo-goc);padding:20px;margin-bottom:18px;box-shadow:var(--bong)}.card>h2:first-child{margin-top:0;padding-left:12px;position:relative}.card>h2:first-child:before{content:"";position:absolute;left:0;top:2px;bottom:2px;width:4px;border-radius:2px;background:var(--accent)}label{display:block;font-weight:600;margin:14px 0 5px;font-size:13px}label .hint{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:2px}input[type=email],input[type=number],input[type=password],input[type=text],select,textarea{width:100%;padding:8px 12px;border:1px solid var(--vien-dam);border-radius:var(--bo-nut);background:var(--panel);color:var(--ink);font:inherit;font-size:14px}textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.6}.btn,button{background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent);padding:8px 16px;border-radius:var(--bo-nut);font:inherit;font-size:14px;font-weight:500;line-height:20px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;box-shadow:0 1px 2px 0 rgba(0,0,0,.05);transition:background .2s,border-color .2s,color .2s}.btn:hover,button:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn.ghost,button.ghost{background:var(--panel);color:var(--accent);border:1px solid var(--accent);box-shadow:none}.btn.ghost:hover,button.ghost:hover{background:var(--accent);color:#fff;border-color:var(--accent)}button:disabled{opacity:.55;cursor:default}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--accent-manh)}.btn:focus-visible,button:focus-visible,header.top a:focus-visible{outline:none;box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--accent-manh)}button.danger{background:transparent;color:var(--warn);border:1px solid var(--line)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.end{justify-content:flex-end}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--vien-hong)}tbody tr:hover,th{background:var(--accent-nhat)}.mono,code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}.tag{background:var(--accent-nhat);color:var(--accent-manh);font-weight:500;display:inline-block;padding:3px 11px;border-radius:999px;font-size:12px;border:1px solid var(--vien-hong)}.tag.on{color:var(--ok);border-color:currentColor}.msg{padding:10px 12px;border-radius:7px;border:1px solid var(--line);margin:12px 0;font-size:14px}.msg.err{color:var(--loi);background:var(--accent-nhat)}.msg.err,.msg.ok{border-color:currentColor}.msg.ok{color:var(--ok)}.muted{color:var(--muted)}.grid2{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}@media (max-width:640px){.grid2{grid-template-columns:1fr}}.q-card{padding:16px 18px 14px}.q-head{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}.q-num{font-size:15px;font-weight:700;letter-spacing:.01em}.q-body{margin-left:2px}.q-options{margin:12px 0 4px 20px;padding-left:16px;border-left:2px solid var(--line)}.q-opt{display:flex;align-items:center;gap:8px;margin-bottom:6px;padding:3px 6px 3px 4px;border-radius:6px}.q-opt.correct{background:color-mix(in srgb,var(--ok) 12%,transparent)}.q-opt-letter{margin:0;min-width:52px;display:flex;align-items:center;gap:6px;font-weight:700;font-size:14px}.q-opt-letter input{width:auto}.q-opt input[type=text]{flex:1 1}.q-opt .rm{padding:2px 9px;font-size:13px;line-height:1.4;opacity:.5}.q-opt:hover .rm{opacity:1}.q-answer,.q-optfoot{margin-left:20px;padding-left:16px}.q-answer{border-left:2px solid var(--line)}.q-foot{margin-top:12px}.sheet{max-width:780px;margin:0 auto;padding:28px 26px 60px;background:var(--panel);color:var(--ink)}.sheet-head{border-bottom:2px solid var(--ink);padding-bottom:10px;margin-bottom:6px}.sheet-head h1{font-size:19px;margin:0 0 3px}.sheet-meta{gap:18px;font-size:13px;color:var(--muted)}.sheet-fill,.sheet-meta{display:flex;flex-wrap:wrap}.sheet-fill{gap:26px;margin:14px 0 22px;font-size:14px}.sheet-fill span{flex:1 1;min-width:190px;border-bottom:1px dotted var(--ink);padding-bottom:2px}.pq{margin-bottom:15px;break-inside:avoid;page-break-inside:avoid}.pq-q{display:flex;gap:8px;font-size:14.5px;line-height:1.5}.pq-q .n{font-weight:700;min-width:24px}.pq-pts{color:var(--muted);font-size:12px;margin-left:6px;white-space:nowrap}.pq-opts{margin:6px 0 0 32px;padding:0;font-size:14px;line-height:1.6}.pq-opts li{list-style:none;display:flex;gap:6px;margin-bottom:2px}.pq-opts .L{font-weight:700;min-width:20px;flex:none}.pq-blank{margin:6px 0 0 32px;border-bottom:1px solid var(--ink);height:17px;max-width:300px}.pq-key{margin:4px 0 0 32px;font-size:13px;font-weight:700;color:var(--ok)}.sheet-prompt{margin:6px 0 18px;font-size:14.5px;line-height:1.6;white-space:pre-wrap;padding:12px 14px;border:1px solid var(--line);border-radius:8px}.write-lines{margin-top:6px}.write-lines div{border-bottom:1px solid var(--line);height:26px}@media print{@page{margin:16mm 14mm}body,html{background:#fff!important}.no-print{display:none!important}.sheet{max-width:none;margin:0;padding:0;background:#fff!important}.sheet,.sheet *{color:#000!important}.pq-blank,.sheet-fill span,.sheet-head{border-color:#000!important}.pq-key{color:#000!important}.pq-opts li,.sheet-prompt,.write-lines div{border-color:#666!important}}@media (max-width:700px){.bank-grid{grid-template-columns:1fr!important}}.drop{border:2px dashed var(--line);border-radius:10px;padding:26px 18px;text-align:center;background:var(--bg);transition:border-color .12s,background .12s;cursor:pointer}.drop.over,.drop:hover{border-color:var(--accent)}.drop.over{background:color-mix(in srgb,var(--accent) 10%,transparent)}.drop .big{font-size:15px;font-weight:600;margin-bottom:4px}.drop .small{font-size:12.5px;color:var(--muted)}.thumbs{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}.thumb{position:relative;width:104px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel)}.thumb img{display:block;width:100%;height:78px;object-fit:cover}.thumb .cap{font-size:11.5px;padding:3px 5px;color:var(--muted)}.thumb .x{right:3px;width:20px;height:20px;border:0;border-radius:50%;font-size:13px;line-height:1;cursor:pointer;padding:0}.thumb .ord,.thumb .x{position:absolute;top:3px;background:rgba(0,0,0,.62);color:#fff}.thumb .ord{left:3px;min-width:18px;height:18px;border-radius:4px;font-size:11px;line-height:18px;text-align:center;font-weight:700}.brow{display:grid;grid-template-columns:30px 1fr 240px 150px;grid-gap:10px;gap:10px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line)}.brow:last-child{border-bottom:0}.bdrop{border:1px dashed var(--line);border-radius:7px;padding:5px 8px;font-size:12.5px;color:var(--muted);cursor:pointer;text-align:center}.bdrop.over,.bdrop:hover{border-color:var(--accent);color:var(--ink)}.bdrop.has{border-style:solid;border-color:var(--accent);color:var(--ink)}.bstat{font-size:13px;text-align:right}.btext{grid-column:3/-1;width:100%;margin:0;font-size:12.5px;line-height:1.5;padding:5px 8px;border:1px solid var(--line);border-radius:7px;resize:vertical;font-family:inherit;background:var(--bg);color:var(--ink)}.btext:focus{border-color:var(--accent);outline:none}@media (max-width:720px){.brow{grid-template-columns:24px 1fr}.bdrop,.bstat,.btext{grid-column:2;text-align:left}}.rep-head{border-bottom:2px solid var(--ink);padding-bottom:10px;margin-bottom:14px}.rep-head h1{font-size:19px;margin:0 0 4px}.rep-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.rep-score{float:right;text-align:right;font-size:26px;font-weight:700;line-height:1.1}.rep-score small{display:block;font-size:12px;font-weight:400;color:var(--muted)}.rq{margin-bottom:12px;break-inside:avoid;page-break-inside:avoid;border-left:3px solid var(--line);padding-left:12px}.rq.ok{border-left-color:var(--ok)}.rq.bad{border-left-color:var(--warn)}.rq .n{font-weight:700}.rq .q{font-size:14px;margin-bottom:3px}.rq .ans{font-size:13.5px;margin-left:2px}.rq .fix{color:var(--ok)}.rq .note{font-size:13px;color:var(--muted);margin-top:2px}.rep-table{width:100%;border-collapse:collapse;font-size:13.5px}.rep-table td,.rep-table th{border:1px solid var(--line);padding:6px 8px;text-align:left}.rep-table th{background:var(--bg);font-size:12px;text-transform:uppercase;letter-spacing:.03em}.rep-table td.num{text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.rep-sign{display:flex;gap:40px;margin-top:34px;font-size:13px}.rep-sign div{flex:1 1;text-align:center}.rep-sign .line{margin-top:52px;border-top:1px dotted var(--ink);padding-top:3px}@media print{@page{margin:15mm 13mm}body,html{background:#fff!important}.no-print{display:none!important}.sheet{max-width:none;margin:0;padding:0;background:#fff!important}.sheet,.sheet *{color:#000!important}.rep-head,.rep-sign .line,.rep-table td,.rep-table th{border-color:#000!important}.rq{border-left-color:#999!important}.rq.ok{border-left-color:#000!important}.rq .fix{font-weight:600}.page-break{break-before:page;page-break-before:always}}@font-face{font-family:font;src:url(/_next/static/media/bf24a9759715e608-s.p.woff2) format("woff2");font-display:swap;font-weight:100 900;font-style:normal}@font-face{font-family:font;src:url(/_next/static/media/904be59b21bd51cb-s.p.woff2) format("woff2");font-display:swap;font-weight:100 900;font-style:normal}@font-face{font-family:font Fallback;src:local("Arial");ascent-override:87.85%;descent-override:22.78%;line-gap-override:0.00%;size-adjust:110.19%}.__className_84bc7a{font-family:font,font Fallback,ui-sans-serif,system-ui,Segoe UI,Roboto,sans-serif}.__variable_84bc7a{--font-chinh:"font","font Fallback",ui-sans-serif,system-ui,Segoe UI,Roboto,sans-serif}