:root{
  --bg:#f1f5f9; --surface:#ffffff; --line:#e2e8f0; --line-2:#cbd5e1;
  --text:#1e293b; --muted:#64748b; --faint:#94a3b8;
  --primary:#4f46e5; --primary-d:#4338ca;
  --green:#16a34a; --green-bg:#dcfce7; --amber:#d97706; --amber-bg:#fef3c7;
  --red:#dc2626; --red-bg:#fee2e2; --sky:#0284c7;
  --r:14px; --r-sm:9px; --sh:0 1px 3px rgba(0,0,0,.08),0 8px 24px -16px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px}
button{font-family:inherit;cursor:pointer;border:none}
.hidden{display:none!important}
.mono{font-family:"JetBrains Mono",monospace}

/* topbar */
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:24px;
  padding:10px 22px;background:#0f172a;color:#fff;box-shadow:var(--sh)}
.brand{display:flex;align-items:center;gap:11px}
.logo{display:flex;width:32px;height:32px;align-items:center;justify-content:center;
  border-radius:9px;background:var(--primary);font-size:16px}
.brand strong{display:block;font-size:15px}
.brand .sub{font-size:11px;color:#94a3b8}
.tabs{display:flex;gap:4px;margin-left:8px}
.tab{padding:7px 16px;border-radius:8px;background:transparent;color:#cbd5e1;font-weight:600;font-size:13px}
.tab.active{background:rgba(255,255,255,.12);color:#fff}
.tab:hover{color:#fff}
.who{margin-left:auto;display:flex;align-items:center;gap:8px}
.who label{font-size:11px;color:#94a3b8}
.who input{padding:7px 11px;border-radius:8px;border:1px solid #334155;background:#1e293b;color:#fff;font-size:13px;width:160px}
.who input:focus{outline:none;border-color:var(--primary)}

.page{max-width:1500px;margin:0 auto;padding:18px}

/* review layout */
#review{display:grid;grid-template-columns:340px 1fr;gap:18px;align-items:start}
.queue{position:sticky;top:74px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.queue-head{display:flex;gap:8px;align-items:center;padding:10px;border-bottom:1px solid var(--line)}
.queue-head select{flex:1;padding:7px 9px;border:1px solid var(--line-2);border-radius:8px;background:#fff;font-size:13px}
.progress{font-size:12px;color:var(--muted);white-space:nowrap}
.list{max-height:calc(100vh - 150px);overflow-y:auto}
.row{display:flex;align-items:center;gap:9px;padding:10px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.row:hover{background:#f8fafc}
.row.active{background:#eef2ff;border-left:3px solid var(--primary);padding-left:9px}
.row .rid{font-size:11px;color:var(--faint);width:26px;flex-shrink:0}
.row .rtext{flex:1;font-size:12.5px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dot{width:9px;height:9px;border-radius:50%;flex-shrink:0;background:var(--line-2)}
.dot.dung{background:var(--green)} .dot.sai{background:var(--red)} .dot.mot_phan{background:var(--amber)}
.werbadge{font-size:10.5px;padding:1px 6px;border-radius:20px;background:#f1f5f9;color:var(--muted);flex-shrink:0}
.werbadge.hi{background:var(--red-bg);color:var(--red)}

/* detail */
.detail{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:22px;min-height:400px}
.detail .empty{color:var(--faint);text-align:center;padding:80px 0}
.dhead{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.dhead .id{font-weight:700;font-size:17px}
.field{margin-bottom:16px}
.field label{display:block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--faint);margin-bottom:6px}
.raw{font-family:"JetBrains Mono",monospace;font-size:13.5px;background:#f8fafc;border:1px solid var(--line);border-radius:var(--r-sm);padding:11px 13px;line-height:1.6;color:#0f172a;word-break:break-word}
.norm{font-size:17px;line-height:1.6;background:#eef2ff;border:1px solid #c7d2fe;border-radius:var(--r-sm);padding:13px 15px;color:#1e1b4b}
audio{width:100%;height:42px;margin-top:4px}
details.stt{margin-bottom:16px}
details.stt summary{cursor:pointer;font-size:12px;color:var(--muted);font-weight:600}
.stt-box{margin-top:8px;font-size:13px;color:var(--muted);background:#f8fafc;border:1px solid var(--line);border-radius:var(--r-sm);padding:10px 12px;line-height:1.6}

/* verdict + form */
.verdicts{display:flex;gap:10px;margin:6px 0 16px}
.vbtn{flex:1;padding:12px;border-radius:10px;border:2px solid var(--line);background:#fff;font-weight:700;font-size:14px;color:var(--muted);transition:.12s}
.vbtn:hover{border-color:var(--line-2)}
.vbtn.sel.dung{border-color:var(--green);background:var(--green-bg);color:var(--green)}
.vbtn.sel.mot_phan{border-color:var(--amber);background:var(--amber-bg);color:var(--amber)}
.vbtn.sel.sai{border-color:var(--red);background:var(--red-bg);color:var(--red)}
textarea,.corr{width:100%;padding:10px 12px;border:1px solid var(--line-2);border-radius:var(--r-sm);font-family:inherit;font-size:13.5px;resize:vertical}
textarea:focus,.corr:focus{outline:none;border-color:var(--primary)}
.save{margin-top:14px;width:100%;padding:12px;border-radius:10px;background:var(--primary);color:#fff;font-weight:700;font-size:14px}
.save:hover{background:var(--primary-d)}
.save:disabled{opacity:.5;cursor:not-allowed}
.revlist{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}
.revlist h4{margin:0 0 8px;font-size:12px;color:var(--faint);text-transform:uppercase;letter-spacing:.04em}
.revitem{font-size:13px;padding:8px 0;border-bottom:1px dashed var(--line)}
.revitem .rv{font-weight:600}
.tag{font-size:11px;padding:1px 8px;border-radius:20px;font-weight:600}
.tag.dung{background:var(--green-bg);color:var(--green)} .tag.sai{background:var(--red-bg);color:var(--red)} .tag.mot_phan{background:var(--amber-bg);color:var(--amber)}

/* dashboard */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-bottom:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:16px 18px}
.card .big{font-size:28px;font-weight:700;line-height:1.1}
.card .lbl{font-size:12px;color:var(--muted);margin-top:4px}
.dash-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:18px}
.panel h3{margin:0 0 14px;font-size:14px}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{font-size:11px;color:var(--faint);text-transform:uppercase}
.recent .r{font-size:12.5px;padding:6px 0;border-bottom:1px dashed var(--line);color:var(--muted)}
.flagged .fitem{padding:12px 0;border-bottom:1px solid var(--line)}
.flagged .fitem .raw{margin:6px 0}
.flagged .corr-show{font-size:13px;color:var(--green);margin-top:4px}

.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;padding:11px 20px;border-radius:10px;font-size:13.5px;box-shadow:var(--sh);z-index:50}
@media(max-width:900px){#review{grid-template-columns:1fr}.dash-grid{grid-template-columns:1fr}}

/* ===== cổng điền tên / đăng nhập ===== */
.gate{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#0f172a,#1e293b);padding:20px}
.gate-card{width:100%;max-width:360px;background:#fff;border-radius:18px;padding:30px 28px;box-shadow:0 30px 80px -20px rgba(0,0,0,.6);display:flex;flex-direction:column}
.gate-logo{width:48px;height:48px;border-radius:13px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto 14px}
.gate-card h1{margin:0;text-align:center;font-size:19px}
.gate-sub{text-align:center;color:var(--muted);font-size:13px;margin:4px 0 18px}
.gate-card label{font-size:12px;font-weight:600;color:var(--muted);margin:10px 0 5px}
.gate-card input{padding:10px 12px;border:1px solid var(--line-2);border-radius:9px;font-size:14px;font-family:inherit}
.gate-card input:focus{outline:none;border-color:var(--primary)}
.gate-card button{margin-top:18px;padding:11px;border-radius:10px;background:var(--primary);color:#fff;font-weight:700;font-size:14px}
.gate-card button:hover{background:var(--primary-d)}
.gate-link{margin-top:14px;text-align:center;font-size:12.5px;color:var(--muted);text-decoration:none}
.gate-link:hover{color:var(--primary)}
.login-err{margin-top:12px;background:var(--red-bg);color:var(--red);padding:8px 11px;border-radius:8px;font-size:13px}
.who-name{font-size:12.5px;color:#cbd5e1}
.who-switch{padding:6px 12px;border-radius:8px;background:rgba(255,255,255,.1);color:#e2e8f0;font-size:12.5px;font-weight:600;text-decoration:none;border:none}
.who-switch:hover{background:rgba(255,255,255,.18);color:#fff}

/* ===== dashboard nâng cấp ===== */
.toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.time-chips{display:flex;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:5px;box-shadow:var(--sh)}
.time-chips button{padding:7px 13px;border-radius:8px;background:transparent;color:var(--muted);font-weight:600;font-size:12.5px}
.time-chips button:hover{background:#f1f5f9}
.time-chips button.active{background:var(--primary);color:#fff}
.custom-range{display:flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:6px 10px;box-shadow:var(--sh)}
.custom-range input{border:1px solid var(--line-2);border-radius:7px;padding:5px 8px;font-size:12.5px;font-family:inherit}
.custom-range span{color:var(--faint)}
.custom-range button{background:var(--primary);color:#fff;border-radius:7px;padding:6px 12px;font-weight:600;font-size:12.5px}
.btn-ghost{margin-left:auto;padding:9px 15px;border-radius:10px;background:var(--surface);border:1px solid var(--line-2);color:var(--text);font-weight:600;font-size:13px;box-shadow:var(--sh)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.card .of{font-size:16px;color:var(--faint);font-weight:600}

.vbar-panel{padding:16px 18px}
.vbar{display:flex;height:14px;border-radius:8px;overflow:hidden;background:#f1f5f9}
.vbar .seg{height:100%}
.vbar .seg.dung{background:var(--green)} .vbar .seg.mot_phan{background:var(--amber)} .vbar .seg.sai{background:var(--red)}
.vbar-legend{display:flex;gap:18px;margin-top:11px;font-size:12.5px;color:var(--muted)}
.vbar-legend .lg{display:flex;align-items:center;gap:6px}
.vbar-legend .dot{width:9px;height:9px;border-radius:50%}

.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;gap:12px;flex-wrap:wrap}
.panel-head h3{margin:0}
.item-filters{display:flex;gap:8px}
.item-filters input{padding:7px 11px;border:1px solid var(--line-2);border-radius:8px;font-size:13px;font-family:inherit;width:200px}
.item-filters select{padding:7px 9px;border:1px solid var(--line-2);border-radius:8px;font-size:13px;background:#fff}
.item-filters input:focus,.item-filters select:focus{outline:none;border-color:var(--primary)}
.muted-cell{color:var(--faint)}
.t{font-size:11px;color:var(--faint);margin-left:6px}

.item-table{border:1px solid var(--line);border-radius:11px;overflow:hidden}
.it-head,.it-row{display:grid;grid-template-columns:46px 1fr 64px 92px 50px 28px;gap:10px;align-items:center;padding:10px 13px}
.it-head{background:#f8fafc;font-size:11px;text-transform:uppercase;color:var(--faint);font-weight:700;letter-spacing:.03em}
.it-row{border-top:1px solid var(--line);cursor:pointer}
.it-row:hover{background:#f8fafc}
.iid{font-size:12px;color:var(--faint)}
.itxt{overflow:hidden}
.ir-raw{font-size:12px;color:#0f172a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ir-norm{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.tag.none{background:#f1f5f9;color:var(--faint)}
.chev{color:var(--faint);text-align:center}
.it-body{padding:14px 16px 18px;background:#fafbfc;border-top:1px dashed var(--line)}
.it-body audio{width:100%;height:40px;margin-bottom:12px}
.ib-field{margin-bottom:12px}
.ib-field label{display:block;font-size:11px;font-weight:700;text-transform:uppercase;color:var(--faint);margin-bottom:5px}
.rc{font-size:13px;margin-top:3px;color:var(--text)}

/* ===== toolbar dropdown + pager ===== */
.tb-lbl{font-size:12.5px;color:var(--muted);font-weight:600}
.tb-sel{padding:8px 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);font-size:13px;font-weight:600;box-shadow:var(--sh);font-family:inherit}
.tb-sel:focus{outline:none;border-color:var(--primary)}
#email-filter{width:180px}
.pager{display:flex;align-items:center;justify-content:space-between;margin-top:12px;flex-wrap:wrap;gap:10px}
.pg-info{font-size:12.5px;color:var(--muted)}
.pg-btns{display:flex;align-items:center;gap:8px}
.pg-btns button{padding:7px 13px;border-radius:8px;border:1px solid var(--line-2);background:var(--surface);font-size:12.5px;font-weight:600;color:var(--text)}
.pg-btns button:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}
.pg-btns button:disabled{opacity:.4;cursor:not-allowed}
.pg-cur{font-size:12.5px;color:var(--muted)}

/* ===== modal chi tiết item ===== */
.modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;
  background:rgba(15,23,42,.55);backdrop-filter:blur(3px);padding:20px}
.modal-card{width:100%;max-width:620px;max-height:85vh;display:flex;flex-direction:column;
  background:#fff;border-radius:16px;box-shadow:0 30px 80px -20px rgba(0,0,0,.6);overflow:hidden}
.m-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line)}
.m-head>div{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.m-id{font-weight:700;font-size:17px}
.m-close{width:30px;height:30px;border-radius:50%;background:#f1f5f9;color:var(--muted);font-size:14px}
.m-close:hover{background:var(--red-bg);color:var(--red)}
.m-scroll{padding:16px 18px;overflow-y:auto}
.m-scroll audio{width:100%;height:42px}

.del-rev{margin-left:6px;background:transparent;font-size:13px;opacity:.5}
.del-rev:hover{opacity:1;transform:scale(1.15)}
.revitem{display:flex;align-items:center;gap:6px;flex-wrap:wrap}

/* ===== preview công thức ===== */
.preview{background:#fff;border:1px solid var(--line-2);border-radius:var(--r-sm);padding:13px 15px;
  font-size:16px;line-height:1.8;color:#0f172a;overflow-x:auto}
.preview mjx-container{margin:2px 0}

/* ===== mobile responsive ===== */
@media(max-width:768px){
  .topbar{gap:10px;padding:10px 13px;flex-wrap:wrap}
  .brand strong{font-size:14px}
  .who{gap:6px}
  .who-name{max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  #review{grid-template-columns:1fr;padding:12px;gap:12px}
  .queue{position:static}
  .list{max-height:200px}
  .detail{padding:15px}
  .norm{font-size:16px}
  .preview{font-size:15px}
  .verdicts{gap:6px}
  .vbtn{padding:11px 4px;font-size:13px}
  .gate-card{padding:24px 20px}
  /* dashboard mobile */
  .toolbar{gap:8px}
  .btn-ghost{margin-left:0}
  .dash-grid{grid-template-columns:1fr}
  .item-filters{flex-wrap:wrap}
  .item-filters input,.item-filters select{width:100%}
  #email-filter,#search{width:100%}
  .it-head{display:none}
  .it-row{grid-template-columns:40px 1fr 54px;grid-auto-rows:min-content;gap:6px 8px}
  .it-row>span:nth-child(4),.it-row>span:nth-child(5){grid-column:2}
  .modal{padding:10px}
  .modal-card{max-height:92vh}
}

@media(max-width:768px){
  .field-raw{display:none}
  .queue{display:none}
  #review{grid-template-columns:1fr}
}

/* ===== nav prev/next trong detail ===== */
.dhead{flex-wrap:wrap}
.nav-bar{margin-left:auto;display:flex;align-items:center;gap:8px}
.nav-bar button{width:32px;height:32px;border-radius:8px;border:1px solid var(--line-2);background:#fff;font-size:16px;color:var(--text);line-height:1}
.nav-bar button:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}
.nav-bar button:disabled{opacity:.35;cursor:not-allowed}
.nav-pos{font-size:12.5px;color:var(--muted);min-width:54px;text-align:center}