/* Phan mem in tem nhan (05/11/2026). Tu chua; mau va nut theo tinh-toan/assets/tt.css. */
:root{--it-blue:#0b5cad;--it-ink:#1d2433;--it-mute:#5d6576;--it-line:#dfe4ec;--it-bg:#f4f7fb;--it-bad:#c62828;--it-warn:#a15c00}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--it-bg);color:var(--it-ink);font:16px/1.55 -apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--it-blue)}
.it-wrap{max-width:1180px;margin:0 auto;padding:0 16px}
.it-top{background:#fff;border-bottom:1px solid var(--it-line)}
.it-top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap}
.it-logo img{display:block}
.it-nav{display:flex;gap:4px;flex-wrap:wrap}
.it-nav a{color:var(--it-ink);text-decoration:none;padding:6px 10px;border-radius:8px;font-size:15px}
.it-nav a:hover,.it-nav a.on{background:#e8f1fc;color:var(--it-blue)}
.it-crumb{font-size:14px;color:var(--it-mute);margin:14px 0 6px}
.it-crumb a{color:var(--it-mute)}
h1{font-size:30px;line-height:1.25;margin:8px 0 6px;color:var(--it-blue)}
.it-answer{background:#fff;border:1px solid var(--it-line);border-left:5px solid var(--it-blue);border-radius:12px;padding:12px 14px;margin:10px 0 16px}
.it-card{background:#fff;border:1px solid var(--it-line);border-radius:14px;padding:16px;margin:16px 0}
.it-card h2{font-size:21px;margin:0 0 12px}
.it-card h3{font-size:17px;margin:16px 0 6px}
.it-txt ul,.it-txt ol{padding-left:22px}
.it-txt li{margin:6px 0}
.it-txt code{background:#eef3f9;border-radius:4px;padding:1px 5px;font-size:14px}
.it-hint{font-size:13px;color:var(--it-mute);margin:6px 0}
.it-warn{color:var(--it-warn);font-weight:600}
.it-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--it-blue);color:#fff;border:0;border-radius:999px;padding:10px 20px;font-weight:600;font-size:16px;text-decoration:none;cursor:pointer;min-height:44px;font-family:inherit}
.it-btn:hover{background:#094a8c;color:#fff}
.it-btn.ghost{background:#fff;color:var(--it-blue);border:1px solid var(--it-blue)}
.it-btn.ghost:hover{background:#eef5fd}
.it-link{background:none;border:0;color:var(--it-bad);text-decoration:underline;cursor:pointer;font-size:15px;min-height:44px}
.it-f{display:flex;flex-direction:column;gap:3px;font-size:13px;color:var(--it-mute);min-width:0}
.it-f input,.it-f select,.it-f textarea{width:100%;padding:8px 10px;border:1px solid #c7cfdb;border-radius:10px;font-size:16px;background:#fff;color:var(--it-ink);min-height:42px;font-family:inherit}
.it-f textarea{resize:vertical;min-height:64px}
.it-row{display:flex;gap:8px;align-items:flex-end}
.it-row.wrap{flex-wrap:wrap}
.it-row > .it-f{flex:1 1 0}
.it-wh .it-row{align-items:center;gap:4px;color:var(--it-ink)}
.it-wh input{width:72px}
.it-chk{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--it-ink);cursor:pointer;margin:6px 0;min-height:32px}
.it-chk input{width:20px;height:20px;margin:0;flex:0 0 auto}
/* trinh thiet ke */
.it-app{background:#fff;border:1px solid var(--it-line);border-radius:16px;padding:14px;margin:16px 0;box-shadow:0 2px 10px rgba(16,40,80,.05)}
.it-bar{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;align-items:end}
.it-a4{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-top:10px;padding:10px;background:#f7f9fc;border-radius:12px}
.it-a4 .it-hint{grid-column:1/-1;margin:0}
.it-main{display:grid;grid-template-columns:130px minmax(0,1fr) 290px;gap:14px;margin-top:14px;align-items:start}
.it-tools{display:flex;flex-direction:column;gap:6px}
.it-tools button,.it-acts button,.it-nav-row button{border:1px solid var(--it-line);background:#fff;border-radius:10px;padding:9px 10px;font-size:15px;cursor:pointer;color:var(--it-ink);text-align:left;min-height:42px;font-family:inherit}
.it-tools button:hover,.it-acts button:hover,.it-nav-row button:hover{border-color:var(--it-blue);color:var(--it-blue)}
.it-acts button.bad{color:var(--it-bad)}
.it-stage-wrap{display:flex;flex-direction:column;align-items:center;min-width:0;background:repeating-conic-gradient(#eef1f6 0% 25%,#f7f9fc 0% 50%) 50%/20px 20px;border-radius:12px;padding:18px 8px 8px}
.it-stage{position:relative;box-shadow:0 1px 6px rgba(0,0,0,.25);background:#fff;border-radius:2px;touch-action:none;max-width:100%}
.it-stage canvas{display:block}
.it-ov{position:absolute;inset:0}
.it-box{position:absolute;cursor:move;outline:1px dashed rgba(11,92,173,.25)}
.it-box:hover{outline-color:rgba(11,92,173,.7)}
.it-box.on{outline:2px solid var(--it-blue);background:rgba(11,92,173,.05)}
.it-h{position:absolute;right:-7px;bottom:-7px;width:14px;height:14px;background:var(--it-blue);border:2px solid #fff;border-radius:3px;cursor:nwse-resize}
.it-nav-row{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:14px}
.it-nav-row button{text-align:center;min-width:44px}
.it-stage-wrap .it-hint{text-align:center}
.it-props{border:1px solid var(--it-line);border-radius:12px;padding:12px;background:#fbfcfe}
.it-props h3{margin:0 0 8px;font-size:16px;color:var(--it-blue)}
.it-props .it-f{margin-bottom:8px}
.it-xy{margin-top:6px}
.it-xy input{padding:8px 6px}
.it-acts{margin-top:8px;gap:6px}
.it-acts button{font-size:14px;padding:6px 10px;min-height:36px}
.it-data{margin-top:16px;padding-top:12px;border-top:1px solid var(--it-line)}
.it-data h2{font-size:18px;margin:0 0 10px}
.it-data .it-row{margin:8px 0}
.it-data .it-row > .it-f{flex:1 1 150px}
.it-data textarea{width:100%;min-height:110px;margin-top:8px;padding:10px;border:1px solid #c7cfdb;border-radius:10px;font:14px/1.4 ui-monospace,Consolas,monospace}
.it-chips{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0}
.it-chips button{border:1px solid #cfe0f5;background:#eef5fd;color:var(--it-blue);border-radius:999px;padding:5px 10px;font-size:14px;cursor:pointer;font-family:ui-monospace,Consolas,monospace;min-height:34px}
.it-table{overflow-x:auto;-webkit-overflow-scrolling:touch}
.it-table table{border-collapse:collapse;font-size:14px;min-width:100%}
.it-table th,.it-table td{border:1px solid var(--it-line);padding:5px 8px;text-align:left;white-space:nowrap;max-width:240px;overflow:hidden;text-overflow:ellipsis}
.it-table th{background:#eaf1fa}
.it-print{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px;padding-top:14px;border-top:1px solid var(--it-line)}
.it-print .it-chk{flex:1 1 100%;margin:0}
.it-prog{flex:1 1 100%;height:8px;background:#e6edf6;border-radius:99px;overflow:hidden}
.it-prog div{height:100%;width:0;background:var(--it-blue);transition:width .2s}
.it-tip{margin-top:10px}
/* noi dung */
.it-types{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin:0;padding:0;list-style:none}
.it-types a{display:block;border:1px solid var(--it-line);border-radius:12px;padding:10px 12px;text-decoration:none;color:var(--it-ink);background:#fff;height:100%}
.it-types a:hover,.it-types a.cur{border-color:var(--it-blue);background:#eef5fd}
.it-types b{display:block;color:var(--it-blue);font-size:15px}
.it-types span{font-size:13px;color:var(--it-mute)}
.it-faq details{border-bottom:1px solid var(--it-line);padding:10px 0}
.it-faq summary{cursor:pointer;font-weight:600}
.it-faq p{margin:8px 0 0}
.it-ad{margin:16px 0;min-height:100px}
.it-foot{margin-top:30px;padding:20px 0;border-top:1px solid var(--it-line);font-size:13px;color:var(--it-mute)}
@media (max-width:980px){
  .it-main{grid-template-columns:minmax(0,1fr)}
  .it-tools{flex-direction:row;flex-wrap:wrap}
  .it-tools button{flex:1 1 30%;text-align:center}
  .it-stage-wrap{order:-1}
}
@media (max-width:640px){
  h1{font-size:24px}
  .it-app{padding:10px;margin:12px -8px;border-radius:12px}
  .it-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .it-nav{flex-wrap:nowrap;overflow-x:auto;width:100%;padding-bottom:4px}
  .it-nav a{white-space:nowrap}
  .it-print .it-btn{flex:1 1 45%}
}