/* Nhà Trọ Quang Tịnh — màu hành Thủy: đen, xanh dương, xanh nước biển */
:root{
  --bg:#EDF2F8; --surface:#FFFFFF; --fg:#0A1622; --muted:#506276; --line:#D2DDE9;
  --accent:#0B5CAD; --on-accent:#FFFFFF; --sea:#0E7C8C;
  --head-bg:#08121D; --head-fg:#EEF4FB; --head-muted:#8FA4BA; --head-accent:#6CB6FF; --head-line:#1A2938;
  --elec:#B26F0E; --water:#0E7C8C;
  --ok:#2B8A57; --warn:#C05A14; --bad:#C2352F; --info:#2F6FB5; --vacant:#7A8A9A;
  --on-bad:#FFFFFF;
  --display:"Lexend",system-ui,sans-serif;
  --body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
  padding-top:env(safe-area-inset-top,0px);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#060C13; --surface:#0E1925; --fg:#E2EBF5; --muted:#8DA1B6; --line:#1C2B3B;
  --accent:#4A9DF0; --on-accent:#03111E; --sea:#2BB3C4;
  --head-bg:#03070C; --head-fg:#E2EBF5; --head-muted:#7D92A8; --head-accent:#6CB6FF; --head-line:#142030;
  --elec:#E6AF48; --water:#3CC0CF;
  --ok:#5CC089; --warn:#F09F4A; --bad:#F07070; --info:#7AB0E8; --vacant:#6A7A8A;
  --on-bad:#1E0C0C; color-scheme:dark}}

*{box-sizing:border-box}
[hidden]{display:none!important}
img{max-width:100%}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:15px;line-height:1.5}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--head-bg)}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--display);font-weight:600;text-wrap:balance;margin:0}
h1{font-size:24px;line-height:1.25}
h2{font-size:17px}
h3{font-size:15px}
.sub{color:var(--muted);margin:0}
.small{font-size:12.5px}
.num-t{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:15;background:var(--head-bg);color:var(--head-fg);border-bottom:1px solid var(--head-line)}
.toprow{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--sea));color:#FFFFFF;display:grid;place-items:center;font-family:var(--display);font-weight:600;flex:none}
.brand b{font-family:var(--display);font-size:17px;display:block;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand small{color:var(--head-muted);font-size:12px}
.brand > div{min-width:0}
.hacts{display:flex;gap:6px;flex:none}
.hbtn{display:inline-flex;align-items:center;gap:6px;background:none;border:1px solid var(--head-line);color:var(--head-fg);border-radius:10px;padding:6px 10px;font:inherit;font-size:13px;cursor:pointer}
.hbtn[aria-current="page"]{border-color:var(--head-accent);color:var(--head-accent)}
.navrow{display:flex;gap:2px;overflow-x:auto}
.navbtn{display:flex;align-items:center;gap:8px;border:0;background:none;font:inherit;font-size:14px;color:var(--head-muted);padding:10px 12px;border-bottom:2px solid transparent;cursor:pointer;white-space:nowrap;position:relative}
.navbtn[aria-current="page"]{color:var(--head-accent);border-bottom-color:var(--head-accent);font-weight:600}
.navbtn:hover{color:var(--head-fg)}
.ico{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.badge{background:var(--bad);color:var(--on-bad);font-size:11px;font-weight:600;min-width:18px;height:18px;padding:0 5px;border-radius:9px;display:inline-grid;place-items:center;font-variant-numeric:tabular-nums}

main{padding-block:20px 48px}
.stack{display:grid;gap:16px}
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;min-width:0}
.card > h2{margin-bottom:12px}
.grid2{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:16px;align-items:start}
.mpick{display:inline-flex;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:3px}
.mpick b{font-family:var(--display);font-weight:600;padding-inline:8px;font-variant-numeric:tabular-nums;white-space:nowrap}
.mpick button{border:0;background:none;color:var(--fg);font:inherit;font-size:18px;width:34px;height:32px;border-radius:9px;cursor:pointer}
.mpick button:hover{background:var(--bg)}

.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.k{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:500}
.stat .v{font-family:var(--display);font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;margin-top:2px}
.stat .v.bad{color:var(--bad)}

.chip{--c:var(--muted);display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:999px;font-size:12.5px;font-weight:500;white-space:nowrap;background:color-mix(in srgb,var(--c) 14%,transparent);color:var(--c)}
.chip::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.c-ok{--c:var(--ok)} .c-warn{--c:var(--warn)} .c-bad{--c:var(--bad)} .c-info{--c:var(--info)} .c-vac{--c:var(--vacant)}

.btn{font:inherit;font-size:14px;font-weight:500;border:1px solid var(--line);background:var(--surface);color:var(--fg);padding:8px 14px;border-radius:10px;cursor:pointer;white-space:nowrap;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.btn.sm{padding:5px 10px;font-size:13px}
.btn.block{width:100%;padding:11px}
.btn:disabled{opacity:.6;cursor:progress}
.link{background:none;border:0;color:var(--accent);font:inherit;cursor:pointer;padding:0;text-decoration:underline}
.filters{display:flex;gap:6px;flex-wrap:wrap}
.filters .btn[aria-pressed="true"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}

.legend{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.floors{display:grid;gap:14px}
.floor h3{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-family:var(--body);font-weight:600;margin-bottom:6px}
.tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.tile{--c:var(--ok);text-align:left;font:inherit;color:var(--fg);background:color-mix(in srgb,var(--c) 9%,var(--surface));border:1px solid color-mix(in srgb,var(--c) 38%,var(--line));border-radius:10px;padding:10px;display:grid;gap:1px;cursor:pointer;min-width:0;align-content:start}
.tile b{font-family:var(--display);font-size:16px;font-weight:600}
.tile .t2{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tile .t3{font-size:12.5px;color:var(--c);font-weight:600;font-variant-numeric:tabular-nums}
.tile.vac{border-style:dashed;background:transparent}
.tile .fix{font-size:11.5px;color:var(--warn)}

.row{display:flex;align-items:center;gap:10px 12px;padding:12px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.row:last-child{border-bottom:0}
.row .grow{flex:1;min-width:150px}
.row .amt{font-weight:600;font-variant-numeric:tabular-nums;min-width:110px;text-align:right}
.row .acts{display:flex;gap:6px}

.pfield{display:grid;gap:4px}
.pfield label{font-size:13px;font-weight:500}
.pin{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:13px}
input.num{width:120px;padding:7px 9px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);font:inherit;font-variant-numeric:tabular-nums;min-width:0}
input.num.err{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 8%,var(--bg))}
.mrow{display:grid;grid-template-columns:96px minmax(0,1fr) minmax(0,1fr) minmax(0,1.25fr) 130px;gap:12px 16px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.mrow:last-of-type{border-bottom:0}
.mhead{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;padding-top:0}
.mcell .lbl{font-size:12px;color:var(--muted);display:none;gap:6px;align-items:center}
.mcell .line{display:flex;align-items:center;gap:8px}
.old{color:var(--muted);font-variant-numeric:tabular-nums;font-size:14px;white-space:nowrap}
input.num.old-in{width:96px;background:transparent;color:var(--muted);border-style:dashed}
input.num.old-in:focus{color:var(--fg);border-style:solid}
.use{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.use.err{color:var(--bad)} .use.warn{color:var(--warn)}
.mtotal{display:grid;gap:4px;justify-items:end;text-align:right;font-weight:600;font-variant-numeric:tabular-nums}
.e-c{color:var(--elec)} .w-c{color:var(--water)}
.mfoot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding-top:14px;border-top:1px solid var(--line);margin-top:4px}
.ph{display:grid;gap:6px;min-width:0}
.thumbs{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.thumb{padding:0;border:1px solid var(--line);background:var(--bg);cursor:pointer;border-radius:6px;overflow:hidden;line-height:0;width:64px;height:48px}
.thumb img{width:64px;height:48px;object-fit:cover}
.ph .meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap}

.lines{display:grid;gap:8px;margin-block:12px}
.ln{display:flex;justify-content:space-between;gap:12px}
.ln > span:last-child{font-variant-numeric:tabular-nums;white-space:nowrap}
.ln.total{border-top:1px dashed var(--line);padding-top:10px;font-weight:600;font-size:18px}
.qrbox{display:flex;gap:16px;align-items:center;flex-wrap:wrap;background:var(--bg);border-radius:12px;padding:14px}
.qrbox img{width:170px;height:auto;border-radius:8px;background:#FFFFFF;flex:none}
.bank{display:grid;gap:2px;min-width:0}
.mono{font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.04em}
.big{font-family:var(--display);font-size:32px;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.2}
.billhead{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.msg{--c:var(--info);border-radius:10px;padding:12px 14px;margin:0;font-weight:500;background:color-mix(in srgb,var(--c) 12%,transparent);color:var(--c)}

.issue{display:grid;gap:8px;padding:14px 0;border-bottom:1px solid var(--line)}
.issue:last-child{border-bottom:0}
.issue .ih{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.issue .ih b{font-family:var(--display)}
.issue p{margin:0;white-space:pre-wrap}
.issue .ia{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.steps{display:flex;align-items:center;font-size:12px;color:var(--muted)}
.steps span{display:flex;align-items:center;gap:5px}
.steps span::before{content:"";width:9px;height:9px;border-radius:50%;border:2px solid var(--line);background:var(--surface)}
.steps span.on{color:var(--fg)}
.steps span.on::before{background:var(--accent);border-color:var(--accent)}
.steps i{width:22px;height:2px;background:var(--line);margin-inline:6px}
.steps i.on{background:var(--accent)}

.form{display:grid;gap:14px}
.form2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.field{display:grid;gap:6px;min-width:0}
.field label{font-size:13px;font-weight:500}
.field input,.field select,.field textarea{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--fg);width:100%}
.field textarea{min-height:84px;resize:vertical}
.hint{font-size:12.5px;color:var(--muted)}
.pin6{letter-spacing:.5em;font-size:22px!important;text-align:center;font-variant-numeric:tabular-nums}
.preview img{max-width:100%;border-radius:8px;margin-top:6px;border:1px solid var(--line)}
.meter-box{display:grid;gap:10px;padding:14px;border:1px solid var(--line);border-radius:12px}
.meter-box h3{display:flex;align-items:center;gap:8px}
.camlabel{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;border:1px dashed var(--muted);border-radius:10px;padding:12px;cursor:pointer;color:var(--fg);font-weight:500}
.camlabel input{position:absolute;opacity:0;width:1px;height:1px}
.camlabel:focus-within{outline:2px solid var(--accent);outline-offset:2px}

.tcol{max-width:620px;margin:0 auto;display:grid;gap:16px}
.hello{display:flex;justify-content:space-between;align-items:center;gap:12px}
.login{max-width:420px;margin:24px auto 0}
.callrow{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.phone{font-family:var(--display);font-size:26px;font-weight:600;color:var(--fg);text-decoration:none;font-variant-numeric:tabular-nums;user-select:all}
.call{display:grid;gap:12px}
.acts{display:flex;gap:6px;flex-wrap:wrap}
.mo{display:grid;gap:8px;padding:10px 12px;border-radius:10px;background:var(--bg)}

.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.vcard{display:grid;gap:10px;align-content:start}
.vcard .vh{display:flex;justify-content:space-between;align-items:center;gap:8px}
.vcard .vh b{font-family:var(--display);font-size:20px}
.facts{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:14px;margin:0}
.facts dt{color:var(--muted)} .facts dd{margin:0;font-variant-numeric:tabular-nums;min-width:0;overflow-wrap:anywhere}
.mini{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.mini .pin{min-width:0}
.mini .pin input.num{width:auto;flex:1;min-width:0}

#modal{position:fixed;inset:0;background:color-mix(in srgb,#000 50%,transparent);display:grid;place-items:center;z-index:50;padding:16px}
.sheet{background:var(--surface);border-radius:16px;max-width:460px;width:100%;max-height:88vh;overflow:auto;padding:20px;display:grid;gap:12px}
.sheet.wide{max-width:720px}
.sheet .sh{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.sheet pre{white-space:pre-wrap;background:var(--bg);padding:12px;border-radius:10px;font:inherit;font-size:14px;margin:0;user-select:all}
.sheet .bigimg{width:100%;border-radius:10px}
#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(24px + env(safe-area-inset-bottom,0px));background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;z-index:60;max-width:calc(100% - 32px);text-align:center}
.center{display:grid;place-items:center;min-height:40vh;text-align:center;gap:8px}

@media (max-width:860px){.form2.four{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:720px){
  .navrow{position:fixed;left:0;right:0;bottom:0;background:var(--head-bg);border-top:1px solid var(--head-line);justify-content:space-around;gap:0;z-index:20;
    padding:6px max(6px,env(safe-area-inset-right,0px)) calc(6px + env(safe-area-inset-bottom,0px)) max(6px,env(safe-area-inset-left,0px))}
  .navbtn{flex-direction:column;gap:2px;font-size:11px;padding:6px 2px;border-bottom:0;flex:1;min-width:0}
  .navbtn .badge{position:absolute;top:0;left:calc(50% + 6px)}
  .brand small{display:none}
  .hbtn span{display:none}
  main{padding-bottom:calc(96px + env(safe-area-inset-bottom,0px))}
  #toast{bottom:calc(84px + env(safe-area-inset-bottom,0px))}
  .grid2{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .mrow{grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-areas:"r t" "e w" "p p"}
  .mrow .r{grid-area:r} .mrow .mtotal{grid-area:t} .mrow .e{grid-area:e} .mrow .w{grid-area:w} .mrow .ph{grid-area:p}
  .mhead{display:none}
  .mcell .lbl{display:flex}
  .mcell .line{flex-wrap:wrap;gap:4px}
  .mrow input.num{width:100%}
  .row .amt{text-align:left;min-width:0}
  h1{font-size:21px}
  .big{font-size:28px}
}
@media (max-width:560px){.form2,.form2.four{grid-template-columns:minmax(0,1fr)}}
@media (prefers-reduced-motion:no-preference){.tile,.btn{transition:border-color .15s,background-color .15s}}