/* ===== CHAN HAIR POS ===== */
:root{
  --red:#c62828; --red-d:#8e1f1f; --red-l:#ffebee;
  --ink:#1f2329; --muted:#6b7280; --line:#e6e8eb; --bg:#f4f5f7; --card:#fff;
  --ok:#0f9d58; --warn:#f59e0b; --info:#1a73e8;
  --radius:10px; --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.04);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.5;-webkit-text-size-adjust:100%}
a{color:var(--info);text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:14px}

/* Layout */
#app{display:flex;min-height:100vh}
#side{width:220px;background:#fff;border-right:1px solid var(--line);position:fixed;top:0;bottom:0;left:0;
  display:flex;flex-direction:column;z-index:40}
#side .logo{padding:16px 18px;border-bottom:1px solid var(--line)}
#side .logo b{color:var(--red);font-size:17px;letter-spacing:.5px}
#side .logo div{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1px}
#side nav{flex:1;overflow:auto;padding:8px 0}
#side a.nv{display:flex;align-items:center;gap:10px;padding:10px 18px;color:#374151;border-left:3px solid transparent}
#side a.nv:hover{background:#fafafa}
#side a.nv.on{background:var(--red-l);color:var(--red);border-left-color:var(--red);font-weight:600}
#side .foot{border-top:1px solid var(--line);padding:10px 14px;font-size:12px;color:var(--muted)}
#main{flex:1;margin-left:220px;min-width:0;display:flex;flex-direction:column}
#top{background:#fff;border-bottom:1px solid var(--line);padding:10px 18px;display:flex;align-items:center;
  gap:12px;position:sticky;top:0;z-index:30}
#top h1{font-size:17px;margin:0;flex:1;font-weight:600}
#body{padding:18px;flex:1}
#burger{display:none;background:none;border:0;font-size:22px;cursor:pointer;color:var(--ink)}

/* Card + grid */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;
  box-shadow:var(--shadow);margin-bottom:16px}
.card h3{margin:0 0 12px;font-size:15px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row.end{justify-content:flex-end}
.grid{display:grid;gap:14px}
.grid2{grid-template-columns:1fr 1fr}
.grid3{grid-template-columns:repeat(3,1fr)}
.grid4{grid-template-columns:repeat(4,1fr)}
.spacer{flex:1}
.small{font-size:12px}
.muted{color:var(--muted)}
.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.center{text-align:center}
.strong{font-weight:600}
.red{color:var(--red)}
.green{color:var(--ok)}

/* Stat */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;box-shadow:var(--shadow)}
.stat .lb{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.stat .vl{font-size:22px;font-weight:700;margin-top:4px}
.stat .sub{font-size:12px;color:var(--muted)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);
  border-radius:8px;padding:7px 13px;cursor:pointer;color:var(--ink);white-space:nowrap}
.btn:hover{border-color:#c9ced6;background:#fafbfc}
.btn.pri{background:var(--red);border-color:var(--red);color:#fff}
.btn.pri:hover{background:var(--red-d);border-color:var(--red-d)}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.gh{background:transparent;border-color:transparent;color:var(--muted);padding:5px 8px}
.btn.gh:hover{background:#f1f2f4;color:var(--ink)}
.btn.sm{padding:4px 9px;font-size:12.5px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Inputs */
.inp,select.inp,textarea.inp{border:1px solid var(--line);border-radius:8px;padding:8px 10px;background:#fff;
  width:100%;outline:none}
.inp:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(198,40,40,.08)}
label.fl{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.fld{margin-bottom:12px}

/* Table */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{background:#fafbfc;font-weight:600;color:#4b5563;white-space:nowrap;font-size:12.5px}
tbody tr:hover{background:#fcfcfd}
tbody tr:last-child td{border-bottom:0}
.empty{padding:28px;text-align:center;color:var(--muted)}

/* Chip / tabs */
.chip{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;background:#eef1f4;color:#374151}
.chip.ok{background:#e6f4ea;color:#137333}
.chip.warn{background:#fef7e0;color:#a06403}
.chip.err{background:#fce8e6;color:#c5221f}
.chip.vip{background:linear-gradient(135deg,#c62828,#ef5350);color:#fff;font-weight:600}
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto}
.tabs a{padding:9px 14px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap;cursor:pointer}
.tabs a.on{color:var(--red);border-bottom-color:var(--red);font-weight:600}

/* Modal */
.mbg{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;
  z-index:100;padding:16px}
.mbox{background:#fff;border-radius:12px;width:520px;max-width:100%;max-height:92vh;display:flex;flex-direction:column;
  box-shadow:0 20px 50px rgba(0,0,0,.25)}
.mbox.wide{width:900px}
.mbox.narrow{width:380px}
.mhd{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center}
.mhd b{font-size:15px}
.mbd{padding:16px 18px;overflow:auto}
.mft{padding:12px 18px;border-top:1px solid var(--line);display:flex;gap:8px;justify-content:flex-end}

/* Toast */
#toasts{position:fixed;top:14px;right:14px;z-index:200;display:flex;flex-direction:column;gap:8px}
.toast{background:#1f2329;color:#fff;padding:10px 16px;border-radius:8px;box-shadow:0 6px 20px rgba(0,0,0,.2);
  max-width:360px;animation:sl .2s ease}
.toast.err{background:#c5221f}
.toast.ok{background:#137333}
@keyframes sl{from{transform:translateX(20px);opacity:0}}

/* POS */
.pos{display:grid;grid-template-columns:1fr 420px;gap:14px;align-items:start}
.postabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.postabs .pt{padding:6px 12px;border:1px solid var(--line);border-radius:20px;background:#fff;cursor:pointer;font-size:13px}
.postabs .pt.on{background:var(--red);border-color:var(--red);color:#fff}
.catbar{display:flex;gap:6px;overflow-x:auto;padding-bottom:8px;margin-bottom:8px}
.catbar .cb{padding:6px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;
  white-space:nowrap;font-size:13px}
.catbar .cb.on{background:#1f2329;color:#fff;border-color:#1f2329}
.items{display:grid;grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:8px;max-height:56vh;overflow:auto}
.itc{border:1px solid var(--line);border-radius:8px;padding:9px 10px;background:#fff;cursor:pointer;text-align:left}
.itc:hover{border-color:var(--red);background:var(--red-l)}
.itc .nm{font-size:13px;font-weight:600;line-height:1.3}
.itc .pr{font-size:12.5px;color:var(--red);margin-top:3px}
.cart{position:sticky;top:70px}
.cline{border-bottom:1px dashed var(--line);padding:8px 0}
.cline .t1{display:flex;gap:8px;align-items:flex-start}
.cline .nm{flex:1;font-weight:600;font-size:13.5px}
.sumrow{display:flex;justify-content:space-between;padding:3px 0}
.sumrow.big{font-size:18px;font-weight:700;color:var(--red);border-top:1px solid var(--line);padding-top:8px;margin-top:6px}

/* Login */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f2329,#3a1414)}
.login .box{background:#fff;padding:30px;border-radius:14px;width:360px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.login h2{margin:0 0 4px;color:var(--red)}

/* Mobile */
@media (max-width:900px){
  #side{transform:translateX(-100%);transition:transform .2s;width:250px;box-shadow:0 0 30px rgba(0,0,0,.2)}
  #side.open{transform:none}
  #main{margin-left:0}
  #burger{display:block}
  #body{padding:12px}
  .pos{grid-template-columns:1fr}
  .cart{position:static}
  .grid2,.grid3,.grid4{grid-template-columns:1fr}
  .grid.g2m{grid-template-columns:1fr 1fr}
  table{font-size:13px}
  th,td{padding:8px}
  .mbox{width:100%}
}
@media print{
  #side,#top,.noprint{display:none!important}
  #main{margin:0}
  body{background:#fff}
}

/* QR chuyển khoản trong màn thanh toán */
.paygrid{display:grid;grid-template-columns:1fr 300px;gap:18px;align-items:start}
.qrbox{background:#fafbfc;border:1px solid var(--line);border-radius:10px;padding:14px;text-align:center}
.qrbox img{width:230px;max-width:100%;border-radius:8px;background:#fff;display:block;margin:0 auto}
.qrbox .qramt{margin-top:8px;font-size:15px}
.qrbox .qramt b{color:var(--red);font-size:19px}
.qrbox .empty{padding:18px 6px}
@media (max-width:900px){
  .paygrid{grid-template-columns:1fr}
  .qrbox img{width:200px}
}