:root{
  --bg:#f4f6fb; --panel:#ffffff; --ink:#1c2433; --muted:#6b7689; --line:#e6eaf2;
  --brand:#6c5ce7; --brand2:#a29bfe; --accent:#ff7aa8;
  --ok:#16a34a; --okbg:#e7f6ec; --warn:#b7791f; --warnbg:#fdf3e2; --info:#2563eb; --infobg:#e8f0fe; --idle:#7a8699; --idlebg:#eef1f6;
  --shadow:0 1px 3px rgba(20,30,60,.06),0 6px 24px rgba(20,30,60,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.55}
.hidden{display:none!important}
.muted{color:var(--muted)} .small{font-size:12.5px} .mt{margin-top:14px}
.err{color:#dc2626;font-size:12.5px;margin-top:8px;min-height:16px}
.link{text-decoration:none;display:inline-block;margin-top:12px}
h1{font-size:22px;margin:0 0 18px;font-weight:700}
h3{font-size:15px;margin:0 0 12px;font-weight:650}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-size:14px;font-family:inherit;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--brand2);box-shadow:0 0 0 3px rgba(108,92,231,.12)}
button{cursor:pointer;font-family:inherit;font-weight:600;border:none;border-radius:10px}
.btn-primary{background:var(--brand);color:#fff;padding:10px 16px}
.btn-primary:hover{background:#5b4bd6}
.btn-primary.block{width:100%;margin-top:6px}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--line);padding:8px 12px}
.btn-ghost:hover{background:#f0f2f7;color:var(--ink)}
.btn-ghost.sm,.btn-primary.sm{padding:6px 10px;font-size:12.5px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.3px}
.logo span{color:var(--brand)} .logo.sm{font-size:17px}

/* AUTH */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,#eef0fb,#f7f0f6)}
.auth-card{width:360px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:32px 28px;box-shadow:var(--shadow);text-align:center}
.auth-card .logo{margin-bottom:2px}
.auth-card input{margin:8px 0}

/* APP LAYOUT */
#app{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--panel);border-right:1px solid var(--line);padding:22px 16px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.sidebar .logo{padding:0 8px 18px}
nav{display:flex;flex-direction:column;gap:4px;flex:1}
.nav{text-align:left;background:transparent;color:var(--muted);padding:10px 12px;border-radius:10px;font-weight:600}
.nav:hover{background:#f0f2f7;color:var(--ink)}
.nav.active{background:rgba(108,92,231,.1);color:var(--brand)}
.side-foot{border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:8px}
.content{flex:1;padding:30px 40px;max-width:1320px;width:100%;margin:0 auto}
@media(max-width:720px){#app{flex-direction:column}.sidebar{width:100%;height:auto;position:static;flex-direction:row;flex-wrap:wrap;align-items:center}nav{flex-direction:row}.content{padding:20px}}

.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
.card input,.card select,.card textarea{margin:6px 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid2 .span2{grid-column:1/-1}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
@media(max-width:720px){.grid2,.row3{grid-template-columns:1fr}}
hr{border:none;border-top:1px solid var(--line);margin:14px 0}

/* AGENTS */
.dept{margin-bottom:24px}
.dept h2{font-size:12.5px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin:0 0 10px}
.agrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.agent{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px}
.agent .nm{font-weight:650;font-size:15px}
.agent .id{font-size:11.5px;color:var(--muted)}
.agent .desc{font-size:13px;color:#475067;min-height:34px}
.badges{display:flex;gap:6px;flex-wrap:wrap}
.badge{font-size:11px;padding:3px 9px;border-radius:30px;font-weight:700}
.s-draft{background:var(--idlebg);color:var(--idle)} .s-training{background:var(--warnbg);color:var(--warn)}
.s-testing{background:var(--infobg);color:var(--info)} .s-live{background:var(--okbg);color:var(--ok)}
.b-soft{background:#f0eefe;color:var(--brand)} .b-tag{background:#eef1f6;color:var(--muted)}
.agent .acts{display:flex;gap:8px;align-items:center;margin-top:4px}
.agent select{width:auto;padding:6px 8px;font-size:12.5px;margin:0}

/* TRAIN */
.train-main{display:flex;gap:16px;margin-bottom:18px;align-items:flex-start}
.train-main .train-wrap{flex:1;min-width:0}
.guide{width:300px;flex-shrink:0;background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:16px 18px}
.guide h3{margin-bottom:10px}
.g-step{margin-bottom:12px;font-size:12.5px;color:#475067}
.g-step b{color:var(--ink)} .g-step p{margin:4px 0 0}
.g-tip{font-size:12.5px;background:#f0eefe;border-radius:10px;padding:10px 12px;color:#4a3fb0}
.kbd{background:#eef1f6;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:12px;color:var(--brand)}
@media(max-width:860px){.train-main{flex-direction:column}.guide{width:100%}}
.train-wrap{background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:visible}
.chat{border-radius:16px 16px 0 0}
.chat-input{border-radius:0 0 16px 16px}
.chat{height:58vh;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px;background:#fafbff}
.bub{max-width:78%;padding:10px 14px;border-radius:14px;font-size:13.5px;white-space:pre-wrap;word-wrap:break-word}
.bub.trainer{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.bub.agent{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.bub .corr{margin-top:8px;display:flex;gap:6px}
.bub .corr button{font-size:11.5px;padding:4px 9px}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);align-items:flex-end}
.composer{flex:1;border:1px solid var(--line);border-radius:10px;background:#fff;overflow:visible}
.composer .ql-toolbar.ql-snow{border:none;border-bottom:1px solid var(--line);padding:6px 8px}
.composer .ql-container.ql-snow{border:none;font-family:inherit;font-size:14px}
.composer .ql-editor{min-height:46px;max-height:180px}
.ql-editor a{color:var(--brand)}
#custBtn{width:auto!important;padding:0 8px!important;font-size:12.5px;color:var(--muted)}
#custBtn:hover{color:var(--ink)}
.correction-edit{background:#faf9ff;border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin-top:8px}
.correction-edit .ql-toolbar.ql-snow{border-radius:8px 8px 0 0;background:#fff}
.correction-edit .ql-container.ql-snow{border-radius:0 0 8px 8px;background:#fff;font-family:inherit}
.correction-edit .ql-editor{min-height:70px}
.toolbar{display:flex;gap:2px;padding:5px 6px;background:#f7f8fc;border-bottom:1px solid var(--line);flex-wrap:wrap}
.toolbar button{background:transparent;border:none;color:var(--muted);padding:4px 8px;border-radius:6px;font-size:12.5px}
.toolbar button:hover{background:#e9ecf5;color:var(--ink)}
/* rendered markdown */
.md strong{font-weight:700} .md em{font-style:italic}
.md a{color:var(--brand);text-decoration:underline}
.bub.trainer .md a{color:#fff}
.md code{background:rgba(0,0,0,.06);padding:1px 5px;border-radius:5px;font-size:12.5px}
.bub.trainer .md code{background:rgba(255,255,255,.2)}
.md blockquote{border-left:3px solid var(--brand2);margin:6px 0;padding:2px 0 2px 10px;color:inherit;opacity:.92}
.md .li{padding-left:4px}
.playbook .addknow{display:flex;gap:8px;margin-bottom:10px}
.pbitem{display:flex;justify-content:space-between;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:8px}
.pbitem .meta{font-size:11.5px;color:var(--muted)}

/* lists */
.urow{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line)}
.urow:last-child{border-bottom:none}
.urow select{width:auto;padding:5px 8px;margin:0;font-size:12.5px}
.ctl{display:flex;gap:6px;align-items:center}
.ctl button{padding:5px 9px;font-size:12.5px}

/* rich content render in chat/playbook/guide */
.md img{max-width:100%;border-radius:8px;margin:4px 0}
.md .ql-size-small{font-size:.75em} .md .ql-size-large{font-size:1.5em} .md .ql-size-huge{font-size:2.2em}
.bub{max-width:82%}
.guide{width:320px}
.guide-head{display:flex;justify-content:space-between;align-items:center}
#guideBox .md p{margin:0 0 8px}
/* emoji popup */
.emoji-pop{position:absolute;bottom:36px;left:0;z-index:50;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px;display:grid;grid-template-columns:repeat(6,1fr);gap:2px;width:230px}
.emoji-pop button{background:transparent;border:none;font-size:18px;padding:4px;border-radius:6px;cursor:pointer}
.emoji-pop button:hover{background:#f0f2f7}

/* Quill fixes: dropdown/tooltip/emoji không bị cắt + nút gọn */
.ql-toolbar .ql-picker-options{z-index:80}
.ql-snow .ql-tooltip{z-index:80}
.emoji-pop{z-index:90}
#msgToolbar button:not(#custBtn):not(#emojiBtn),[id$="_tb"] button{font-weight:normal;border-radius:3px}
#custBtn,#emojiBtn{width:auto!important;font-weight:600}
/* font family render */
.ql-font-arial{font-family:Arial,Helvetica,sans-serif}
.ql-font-times{font-family:'Times New Roman',Times,serif}
.ql-font-georgia{font-family:Georgia,serif}
.ql-font-tahoma{font-family:Tahoma,sans-serif}
.ql-font-verdana{font-family:Verdana,sans-serif}
.ql-font-couriernew{font-family:'Courier New',monospace}
.ql-snow .ql-picker.ql-font{width:110px}
.ql-snow .ql-picker.ql-font .ql-picker-label:not([data-value])::before,.ql-snow .ql-picker.ql-font .ql-picker-item:not([data-value])::before{content:"Mặc định"}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="arial"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="arial"]::before{content:"Arial";font-family:Arial,sans-serif}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="times"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="times"]::before{content:"Times New Roman";font-family:'Times New Roman',serif}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="georgia"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="georgia"]::before{content:"Georgia";font-family:Georgia,serif}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="tahoma"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="tahoma"]::before{content:"Tahoma";font-family:Tahoma,sans-serif}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="verdana"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="verdana"]::before{content:"Verdana";font-family:Verdana,sans-serif}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="couriernew"]::before,.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="couriernew"]::before{content:"Courier New";font-family:'Courier New',monospace}
.ql-snow .ql-tooltip{z-index:90}
.ql-font-arial::before{font-family:Arial}.ql-font-times::before{font-family:'Times New Roman'}
/* image control popup */
.imgctl{position:absolute;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:4px;display:flex;gap:3px;z-index:95}
.imgctl button{font-size:11.5px;padding:3px 7px;background:#f4f6fb;border:1px solid var(--line);border-radius:5px;color:var(--ink)}
.imgctl button:hover{background:#e9ecf5}
.ql-editor img{cursor:pointer}

/* ---- Thống kê & Cost Guardian ---- */
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-top:8px}
.stat-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px}
.stat-card .sc-val{font-size:24px;font-weight:800;color:var(--brand)}
.stat-card .sc-lab{font-weight:600;margin-top:2px}
.stat-card .sc-sub{margin-top:2px}
.stat-agent{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:8px}
.stat-agent .sa-top{display:flex;justify-content:space-between;align-items:center}
.stat-agent .sa-met{margin-top:4px}
.stat-agent .sa-flags{margin-top:8px;display:flex;flex-direction:column;gap:4px}
.stat-agent .flag{background:#fff3f6;color:#c0395f;border:1px solid #ffd5e1;border-radius:8px;padding:4px 8px;font-size:12px}
.stat-days{display:flex;align-items:flex-end;gap:6px;height:90px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px}
.day-bar{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%}
.day-bar .db-fill{width:60%;min-height:2px;background:linear-gradient(180deg,var(--brand2),var(--brand));border-radius:4px 4px 0 0}
.day-bar .db-lab{font-size:10px;margin-top:4px}

/* ---- Sổ tay nghiệp vụ (auto-skill) ---- */
.skillbox{background:#f6f4ff;border:1px solid #e2dcff;border-radius:14px;padding:14px 16px;margin-top:16px}
.skillbox .md{max-height:280px;overflow:auto}
.skillbox #skillMeta{font-weight:400}