:root{
  --ink:#16172b;--ink2:#4b4d63;--muted:#8a8ca3;--line:#e9eaf2;--bg:#f5f6fb;--card:#fff;
  --pri:#5b4cf0;--pri2:#7a6cff;--pri-soft:#efedff;--ok:#16a34a;--ok-soft:#e8f7ee;--err:#e5383b;--err-soft:#fdecec;
  --warn:#d97706;--warn-soft:#fff4e0;--radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--pri);text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}
.muted{color:var(--muted)} .small{font-size:12.5px} .right{text-align:right} .nowrap{white-space:nowrap}
.hidden{display:none!important}

/* thanh đầu + menu */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;height:64px;padding:0 18px;background:#fff;border-bottom:1px solid var(--line)}
.burger{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:18px}
.logo{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;font-size:18px;box-shadow:0 8px 18px -8px rgba(91,76,240,.7)}
.brand{font-weight:800;font-size:17px}.brand small{font-weight:600;color:var(--muted);margin-left:6px;font-size:12px}
.top .sp{flex:1}
.who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink2)}
.layout{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 64px)}
.nav{background:#fff;border-right:1px solid var(--line);padding:14px 10px}
.nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;color:var(--ink2);font-weight:600;margin-bottom:2px}
.nav a:hover{background:var(--bg)} .nav a.on{background:var(--pri-soft);color:var(--pri)}
.nav .ic{width:20px;text-align:center}
main{padding:22px;max-width:1280px;width:100%}
h1{font-size:20px;margin:0 0 16px}
@media(max-width:900px){
  .burger{display:inline-flex;align-items:center;justify-content:center}
  .layout{grid-template-columns:1fr}
  .nav{position:fixed;top:64px;left:0;bottom:0;width:240px;z-index:15;transform:translateX(-105%);transition:transform .2s ease;box-shadow:10px 0 30px -20px rgba(0,0,0,.3)}
  .nav.open{transform:none}
  main{padding:14px}
  .who .name{display:none}
}

/* khối thẻ */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 1px 2px rgba(16,18,35,.03);margin-bottom:16px}
.card>.hd{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.card>.hd h3{margin:0;font-size:13px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--ink2)}
.card>.hd .sp{flex:1}
.card>.bd{padding:16px 18px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.g2,.g3{grid-template-columns:1fr}}

/* số lớn */
.kpis{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-bottom:16px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.kpi .l{font-size:12px;color:var(--muted);font-weight:600}
.kpi .v{font-size:24px;font-weight:800;margin-top:2px}
.kpi .s{font-size:12px;color:var(--muted)}
.kpi.ok .v{color:var(--ok)}.kpi.err .v{color:var(--err)}.kpi.warn .v{color:var(--warn)}
@media(max-width:1100px){.kpis{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.kpis{grid-template-columns:repeat(2,1fr)}}

/* thanh ngang kiểu DataCenter */
.bars .row{display:grid;grid-template-columns:minmax(110px,32%) 1fr auto;align-items:center;gap:14px;padding:7px 0}
.bars .k{color:var(--ink2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bars .track{height:12px;border-radius:999px;background:#eef0f6;overflow:hidden;position:relative}
.bars .fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--pri),var(--pri2))}
.bars .fill.err{background:linear-gradient(90deg,#e5383b,#ff6b6b)}
.bars .n{font-weight:800;min-width:60px;text-align:right}
.bars .sub{font-size:11.5px;color:var(--muted);font-weight:600}
.empty{color:var(--muted);padding:10px 0}

/* biểu đồ cột theo giờ */
.cols{display:flex;align-items:flex-end;gap:3px;height:150px;padding-top:6px}
.cols .c{flex:1;display:flex;flex-direction:column-reverse;min-width:4px;height:100%;position:relative}
.cols .c .a{background:linear-gradient(180deg,var(--pri2),var(--pri));border-radius:4px 4px 0 0}
.cols .c .e{background:#e5383b;border-radius:4px 4px 0 0}
.cols .c:hover::after{content:attr(data-t);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:11px;padding:4px 7px;border-radius:6px;white-space:pre;z-index:5;margin-bottom:4px}
.cols-x{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:6px}

/* nút, chip, ô nhập */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:600;transition:background .15s,border-color .15s}
.btn:hover{border-color:#cfd2e3}.btn.pri{background:var(--pri);border-color:var(--pri);color:#fff}.btn.pri:hover{background:#4a3be0}
.btn.danger{color:var(--err);border-color:#f5c2c3}.btn.danger:hover{background:var(--err-soft)}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:8px}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{padding:7px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:600;color:var(--ink2)}
.chip.on{background:var(--pri-soft);border-color:#d9d4ff;color:var(--pri)}
input[type=text],input[type=password],input[type=number],input:not([type]),select,textarea{border:1px solid var(--line);border-radius:10px;padding:8px 11px;background:#fff;outline:none;min-width:0}
input:focus,select:focus,textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(91,76,240,.12)}
textarea{width:100%;min-height:70px}
.form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.form label{font-size:12.5px;color:var(--muted);font-weight:600}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:11.5px;font-weight:700;background:#eef0f6;color:var(--ink2)}
.tag.ok{background:var(--ok-soft);color:var(--ok)}.tag.err{background:var(--err-soft);color:var(--err)}.tag.warn{background:var(--warn-soft);color:var(--warn)}.tag.pri{background:var(--pri-soft);color:var(--pri)}

/* bảng */
.tbl{width:100%;border-collapse:collapse}
.tbl th{text-align:left;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:700;padding:9px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.scroll{overflow-x:auto}

/* máy (client) */
.client{border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px;background:#fff}
.client .row1{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.client h4{margin:0;font-size:15px}
.client .sec{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.client .sec>b{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.grants{display:flex;gap:12px;flex-wrap:wrap}
.grants label{display:flex;gap:6px;align-items:center;font-weight:600;color:var(--ink2)}
.ipline{display:flex;gap:8px;align-items:center;padding:3px 0}

/* đăng nhập */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.auth .box{width:100%;max-width:400px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:0 30px 70px -40px rgba(16,18,35,.35)}
.auth h2{margin:14px 0 4px;font-size:21px}.auth p{margin:0 0 18px;color:var(--muted)}
.auth .f{display:block;margin-bottom:12px}.auth .f span{display:block;font-size:12.5px;font-weight:700;margin-bottom:5px}
.auth input{width:100%;padding:11px 12px}
.auth .btn{width:100%;justify-content:center;padding:11px}
.auth .qr{display:flex;justify-content:center;margin:8px 0 10px}.auth .qr svg{width:200px;height:200px}
.err-box{background:var(--err-soft);color:var(--err);border-radius:10px;padding:9px 12px;font-weight:600;margin-bottom:12px}

/* hộp thoại + thông báo */
.modal{position:fixed;inset:0;background:rgba(16,18,35,.45);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal .box{background:#fff;border-radius:18px;max-width:560px;width:100%;padding:22px}
.modal h3{margin:0 0 10px}
.keybox{background:#0f1020;color:#c8ffd1;border-radius:10px;padding:12px;word-break:break-all;margin:10px 0}
.toast{position:fixed;right:18px;bottom:18px;z-index:60;background:var(--ink);color:#fff;padding:11px 16px;border-radius:12px;box-shadow:0 14px 30px -14px rgba(0,0,0,.5);max-width:420px}
.toast.err{background:var(--err)}

/* điện thoại: thanh đầu gọn, thanh ngang xuống dòng riêng cho đủ rộng */
.who .btn{white-space:nowrap}
@media(max-width:560px){
  .brand small{display:none}
  .top{gap:10px;padding:0 12px}
  .bars .row{grid-template-columns:1fr auto;row-gap:6px}
  .bars .track{grid-column:1/-1;order:3}
}