:root{--ink:#17324b;--muted:#5b6c7e;--navy:#103857;--teal:#167b85;--bg:#f3f7fb;--panel:#fff;--border:#d9e4ed;--green:#186c4d;--orange:#8a5410;--red:#a43c3c;--soft:#eaf3fa}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);font-family:Inter,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);line-height:1.5;font-size:16px}
body.busy{cursor:progress}
body.busy button{opacity:.65;pointer-events:none}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;overflow-wrap:anywhere}
.topbar{background:var(--navy);color:#fff;position:sticky;top:0;z-index:30;box-shadow:0 1px 6px #183f5c26}
.top-inner{max-width:1240px;margin:auto;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{color:#fff!important;display:flex;align-items:center;gap:9px;font-size:18px;font-weight:700;line-height:1.12}
.brand-mark{width:40px;height:40px;display:grid;place-items:center;background:#ffffff20;border-radius:10px;font-size:24px}
.brand small{font-size:11px;color:#c7dbe6;display:block;font-weight:400;margin-top:3px}
.nav{display:flex;align-items:center;gap:14px}
.nav{flex:none}
.nav a{color:#fff;white-space:nowrap}
.nav button{white-space:nowrap}
.netbar{background:#8a2f2f;color:#fff;text-align:center;padding:8px 14px;font-size:14px;position:sticky;top:60px;z-index:29}
.container{max-width:1240px;margin:20px auto 52px;padding:0 18px;min-height:65vh}
.narrow{max-width:560px;margin:30px auto}
.footer{text-align:center;padding:20px;color:var(--muted);font-size:13px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 7px 24px #1c52700a;margin-bottom:16px}
.card h1,.card h2,.card h3{margin:0 0 9px}
h1{font-size:24px;margin:0}
.card h2{font-size:19px}
.card h3{font-size:16px}
p{margin:7px 0 12px;overflow-wrap:anywhere}
.sub{color:var(--muted);font-size:14px}
.small{font-size:14px}
.muted{color:var(--muted)}
.mono,.code{font-family:Consolas,"Courier New",monospace}
.big{font-size:22px;letter-spacing:2px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.between{justify-content:space-between}
.gap{margin-top:15px}
.right{text-align:right}
.hide{display:none!important}
.headerline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:13px;flex-wrap:wrap}
.headerline h1,.headerline h2,.headerline h3{margin:0}
label{display:block;font-weight:650;font-size:14px;margin:12px 0 5px}
label.check{display:flex;gap:9px;align-items:flex-start;font-weight:500}
label.check input{margin-top:4px}
fieldset{border:1px solid var(--border);border-radius:10px;padding:10px 14px 14px;margin:14px 0}
legend{font-weight:700;font-size:15px;padding:0 6px}
input,select,textarea{display:block;width:100%;background:#fff;border:1px solid #b9c8d6;border-radius:9px;padding:11px 12px;font:inherit;color:var(--ink)}
textarea{min-height:92px;resize:vertical}
input:focus-visible,select:focus-visible,textarea:focus-visible,button:focus-visible,.listrow:focus-visible{outline:3px solid #0e88838c;outline-offset:1px}
input[type=radio],input[type=checkbox]{width:20px;height:20px;display:inline-block;accent-color:var(--teal);flex:none;padding:0}
input[type=file]{padding:8px;font-size:14px}
button{display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--teal);color:#fff;border:1px solid var(--teal);border-radius:9px;padding:11px 15px;font:inherit;font-weight:600;font-size:14px;cursor:pointer;line-height:1.25;min-height:42px}
button:hover{filter:brightness(.95)}
button:disabled{opacity:.55;cursor:not-allowed}
.secondary{background:#fff;color:var(--ink);border-color:#b9c8d6}
.danger{background:var(--red);border-color:var(--red)}
.tiny{padding:7px 10px;font-size:13px;min-height:34px}
.full{width:100%}
.tag{display:inline-block;background:#e6f2f2;color:#145e64;padding:3px 8px;border-radius:6px;font-size:13px;font-weight:650}
.tag.warn{color:var(--orange);background:#fff1dc}
.tag.good{color:var(--green);background:#e4f5ed}
.tag.gray{color:#465668;background:#e9edf3}
.tag.bad{color:var(--red);background:#fbe9e9}
.warning{background:#fff6e6;border:1px solid #efd2a6;border-radius:9px;padding:12px;color:#6a4a17}
.info{background:#eaf5ff;border:1px solid #c7e1f4;border-radius:9px;padding:12px}
.danger-box{background:#fdecec;border:1px solid #e9b4b4;border-radius:9px;padding:12px;color:#7a2626}
.saved{background:#f1f8f4;border:1px solid #cfe6d9;border-radius:9px;padding:12px;margin:10px 0}
.question{border-left:4px solid var(--teal);padding:10px 13px;background:#f4fafb;margin-bottom:12px}
.choices{display:grid;gap:8px}
.choices.three{grid-template-columns:repeat(3,1fr)}
.choice{border:1px solid var(--border);background:#fbfcfd;border-radius:9px;padding:12px;display:flex;align-items:flex-start;gap:10px;margin:0;font-weight:500;font-size:15px;cursor:pointer}
.choice:has(input:checked){background:#e7f6f3;border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal)}
.choice input{margin-top:2px}
.stagebar{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 14px}
.stage{border-radius:30px;background:#eff3f6;border:1px solid #e0e7ee;color:#506374;padding:6px 12px;font-size:13px;font-weight:600}
.stage.done{background:#e4f5ed;color:var(--green);border-color:#cbe8da}
.stage.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.stat-inline{background:#f1f6fa;border:1px solid #e0e9f0;border-radius:8px;padding:6px 10px;font-size:14px}
.stat-inline b{font-size:17px;color:var(--navy)}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 14px;border-bottom:2px solid var(--border);padding-bottom:0}
.tabs button{background:transparent;color:var(--muted);border:0;border-bottom:3px solid transparent;border-radius:0;margin-bottom:-2px;padding:10px 12px}
.tabs button.active{color:var(--navy);border-bottom-color:var(--teal)}
.stat{background:#f6f9fc;border:1px solid #e3ebf1;padding:15px;border-radius:11px}
.stat big{font-size:28px;font-weight:750;color:var(--navy);display:block}
.stat small{display:block;color:var(--muted);font-size:14px}
.progress{height:12px;border-radius:20px;background:#e4eaf1;overflow:hidden}
.progress>div{height:100%;background:var(--teal);transition:width .2s}
.bars{display:grid;gap:10px}
.barrow{display:grid;grid-template-columns:minmax(110px,1.2fr) 1fr 40px;align-items:center;gap:11px;font-size:14px}
.barrow>span{overflow-wrap:anywhere}
.bar{background:#e1e9f0;height:18px;border-radius:7px;overflow:hidden}
.bar>div{height:100%;background:var(--teal);border-radius:7px}
.scrolltable{overflow:auto;max-width:100%}
.scrolltable.pins{max-height:340px}
.scrolltable.codes{max-height:430px}
table{border-collapse:collapse;width:100%;font-size:14px}
td,th{border-bottom:1px solid #e4ebf1;padding:9px;text-align:left;vertical-align:top}
th{background:#eef4f8;font-weight:700;white-space:nowrap;position:sticky;top:0}
table.dx{min-width:980px}
table.dx td:nth-child(3){min-width:210px}
tr.confirmed td{background:#f5fbf8}
.explain{background:#f7f9fb;border-left:3px solid #c5d3df;padding:6px 9px;border-radius:4px;overflow-wrap:anywhere}
.assess{min-width:300px;display:grid;grid-template-columns:1fr 1fr;gap:5px;align-content:start}
.assess select,.assess input{padding:7px 8px;font-size:13px}
.assess .row{grid-column:1/-1;gap:5px}
.paper{display:grid;gap:6px;margin-top:8px;max-width:520px}
.paper select,.paper input,.paper textarea{padding:7px 8px;font-size:13px}
.roster-secret{background:#fff9e7;border-color:#e5d59a}
.listrow{display:flex;justify-content:space-between;align-items:center;padding:11px;border:1px solid var(--border);border-radius:9px;gap:10px;cursor:pointer;margin:8px 0}
.listrow:hover{background:#f5fafe}
.listrow.static{cursor:default}
.listrow.static:hover{background:transparent}
.fileimage{width:min(100%,360px);border-radius:8px;border:1px solid #dae6ec;max-height:320px;object-fit:contain;background:#fff}
.proposal{border:1px solid var(--border);border-radius:10px;padding:13px;margin-bottom:11px}
.proposal.pending{border-left:5px solid #d99a2b}
.proposal.approved{border-left:5px solid #2b9a6b}
.proposal.revise{border-left:5px solid #c05050}
.code{background:#eef4f7;border-radius:7px;padding:7px 10px;word-break:break-all;font-size:14px}
pre.data{font:13px Consolas,"Courier New",monospace;background:#eef4f7;border-radius:7px;padding:9px 11px;white-space:pre-wrap;overflow-wrap:anywhere;margin:6px 0;max-height:260px;overflow:auto}
.qrcode{background:#fff;padding:8px;border:1px solid var(--border);border-radius:8px;width:150px;height:150px;flex:none}
.qrcode svg{width:100%;height:100%;display:block}
.history{padding-left:20px;font-size:14px}
.history li{margin-bottom:8px}
details>summary{cursor:pointer;font-weight:600;padding:6px 0}
.editrow{display:grid;grid-template-columns:24px 64px 1fr auto;gap:6px;align-items:center;margin-bottom:6px}
.editrow:has(select){grid-template-columns:64px 1fr minmax(120px,220px) auto}
.editrow input,.editrow select{padding:8px}
blockquote{margin:10px 0;padding:10px 16px;border-left:5px solid var(--teal);background:#f4fafb;border-radius:6px}
hr{border:0;border-top:1px solid var(--border);margin:16px 0}
#toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);width:max-content;max-width:min(520px,calc(100vw - 28px));z-index:200;color:#fff;background:#203b53;border-radius:11px;padding:13px 18px;display:none;box-shadow:0 6px 22px #1a2f4870;font-size:15px}
#toast.show{display:block}
#toast.error{background:#8f3535}
.loading{text-align:center;color:var(--muted);padding:50px}
.small-card{background:#fff;border:1px solid var(--border);padding:13px;border-radius:10px}

/* Màn hình trình chiếu ẩn danh: chữ to, không có thanh điều hướng */
body.projecting .topbar,body.projecting .footer{display:none}
body.projecting .container{max-width:none;margin:0;padding:0}
.projector{min-height:100vh;background:#f4f8fb;padding:22px 34px 40px;font-size:22px}
.projector h1{font-size:clamp(30px,3.4vw,52px);margin:8px 0 18px}
.projector h2{font-size:clamp(22px,2.2vw,32px)}
.projector h3{font-size:22px}
.projector .lead{font-size:clamp(20px,2vw,28px);font-weight:500}
.projector .sub{font-size:17px}
.projector .card{box-shadow:none;padding:24px}
.projector .stat big{font-size:52px}
.projector .stat small{font-size:19px}
.projector .barrow{font-size:21px;grid-template-columns:minmax(200px,1.3fr) 1fr 64px}
.projector .barrow>b:last-child{font-size:28px}
.projector .bar{height:32px}
.projector .tag{font-size:17px;padding:5px 11px}
.projector blockquote{font-size:24px}
.projector pre.data{font-size:17px}
.navprojector{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.join{display:flex;gap:30px;align-items:center}
.qrcode.big{width:290px;height:290px}
.joinurl{font:26px Consolas,monospace;word-break:break-all}
.huge{font-size:60px;letter-spacing:6px}
.spot{border:3px solid var(--teal)}

@media(max-width:820px){
  body{font-size:16px}
  .grid,.grid3,.choices.three{grid-template-columns:1fr}
  .top-inner{padding:8px 12px}
  .brand{font-size:14px}
  .brand-mark{width:32px;height:32px;font-size:19px}
  .brand small{display:none}
  .nav{gap:9px}
  .nav a{font-size:14px}
  .card{padding:15px}
  .container{padding:0 10px;margin-top:12px}
  .barrow{grid-template-columns:minmax(90px,1fr) 1fr 32px}
  .headerline .row{width:100%}
  .join{flex-direction:column;align-items:flex-start}
  .projector{padding:12px;font-size:18px}
  .projector .barrow{grid-template-columns:1fr 1fr 44px;font-size:16px}
  button{min-height:46px}
  .tiny{min-height:38px}
}
@media print{.topbar,.footer,.tabs,button,#toast{display:none!important}.card{box-shadow:none;break-inside:avoid}}