:root {
  --bg: #0a0f0a;
  --bg2: #101810;
  --panel: #141e14;
  --panel2: #1a271a;
  --border: #234023;
  --green: #35e01a;
  --green-dim: #26a013;
  --green-glow: rgba(53, 224, 26, 0.25);
  --gold: #e8c04a;
  --text: #e8f5e6;
  --muted: #8fae8c;
  --red: #ff5d5d;
  --radius: 12px;
  font-size: 15px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { background: var(--bg); }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Noto Sans Khmer", "Khmer OS", sans-serif;
  min-height: 100vh;
}

/* ---------- Layout ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px; flex-shrink: 0;
  background: linear-gradient(180deg, #0c130c, #0a0f0a);
  border-right: 1px solid var(--border);
  padding: 20px 12px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.logo { text-align: center; margin-bottom: 22px; }
.logo-img { width: 150px; max-width: 100%; border-radius: 50%; box-shadow: 0 0 24px var(--green-glow); }
.logo .m {
  font-size: 44px; font-weight: 900; line-height: 1;
  background: linear-gradient(180deg, #7dff5e, #1d9c0a);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 24px var(--green-glow);
  font-style: italic;
}
.logo .name { color: var(--gold); font-weight: 800; letter-spacing: 3px; font-size: 15px; margin-top: 2px; }
.nav button {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: none; border: none; color: var(--muted);
  padding: 11px 14px; border-radius: 10px; cursor: pointer;
  font-size: 14.5px; font-weight: 600; text-align: left; margin-bottom: 3px;
  transition: all .15s;
}
.nav button .ic { font-size: 17px; width: 22px; text-align: center; }
.nav button:hover { background: var(--panel); color: var(--text); }
.nav button.active {
  background: linear-gradient(90deg, rgba(53,224,26,.18), transparent);
  color: var(--green); border-left: 3px solid var(--green); border-radius: 4px 10px 10px 4px;
}
.main { flex: 1; padding: 24px 28px; max-width: 1200px; }
.page-title { font-size: 22px; font-weight: 800; margin-bottom: 4px; }
.page-sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }

/* ---------- Cards & panels ---------- */
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 18px;
}
.card h3 { font-size: 15px; margin-bottom: 14px; color: var(--green); font-weight: 700; }
.grid { display: grid; gap: 14px; }
.grid.cols2 { grid-template-columns: 1fr 1fr; }
.grid.cols3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid.cols2, .grid.cols3, .grid.cols4 { grid-template-columns: 1fr 1fr; }
  .sidebar { width: 70px; }
  .sidebar .name, .nav button span.lbl { display: none; }
  .main { padding: 16px; }
}

/* stat tiles */
.stat {
  background: linear-gradient(145deg, var(--panel2), var(--panel));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px;
}
.stat .lbl { color: var(--muted); font-size: 12.5px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }
.stat .val { font-size: 26px; font-weight: 800; margin-top: 6px; }
.stat .val.green { color: var(--green); }
.stat .val.gold { color: var(--gold); }
.stat .val.red { color: var(--red); }
.stat .sub { color: var(--muted); font-size: 12px; margin-top: 3px; }

/* ---------- Forms ---------- */
label.f { display: block; font-size: 12.5px; color: var(--muted); font-weight: 600; margin-bottom: 5px; }
input, select, textarea {
  width: 100%; background: var(--bg2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: 14.5px; font-family: inherit;
  outline: none; transition: border-color .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--green-dim); box-shadow: 0 0 0 3px var(--green-glow); }
.frow { display: grid; gap: 12px; margin-bottom: 12px; }
.frow.c2 { grid-template-columns: 1fr 1fr; }
.frow.c3 { grid-template-columns: 1fr 1fr 1fr; }
.frow.c4 { grid-template-columns: repeat(4, 1fr); }

/* segmented choice (cash/qr, old/new) */
.seg { display: flex; gap: 8px; }
.seg button {
  flex: 1; background: var(--bg2); border: 1px solid var(--border); color: var(--muted);
  padding: 10px; border-radius: 8px; cursor: pointer; font-weight: 700; font-size: 14px;
  transition: all .15s;
}
.seg button.on { background: rgba(53,224,26,.15); border-color: var(--green); color: var(--green); }

/* service picker */
.svc-pick { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.svc-pick .svc {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px; cursor: pointer; text-align: center; transition: all .15s;
}
.svc-pick .svc:hover { border-color: var(--green-dim); }
.svc-pick .svc.on { border-color: var(--green); background: rgba(53,224,26,.12); box-shadow: 0 0 14px var(--green-glow); }
.svc-pick .svc .svc-ic { font-size: 30px; line-height: 1.1; margin-bottom: 4px; }
.svc-pick .svc.on .svc-ic { filter: drop-shadow(0 0 8px var(--green-glow)); }
.svc-pick .svc .km { font-size: 12px; color: var(--green); }
.svc-pick .svc .en { font-size: 13px; font-weight: 700; margin: 4px 0; }
.svc-pick .svc .pr { font-size: 20px; font-weight: 800; color: var(--gold); }

/* buttons */
.btn {
  background: linear-gradient(180deg, #46e62c, #23a90e); color: #04140a;
  border: none; border-radius: 9px; padding: 11px 20px;
  font-size: 15px; font-weight: 800; cursor: pointer; font-family: inherit;
  box-shadow: 0 2px 12px var(--green-glow);
}
.btn:hover { filter: brightness(1.1); }
.btn.secondary { background: var(--panel2); color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.btn.danger { background: none; color: var(--red); border: 1px solid transparent; box-shadow: none; padding: 6px 10px; font-size: 13px; }
.btn.danger:hover { border-color: var(--red); }
.btn.small { padding: 7px 12px; font-size: 13px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Tables ---------- */
.tbl-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
td { padding: 10px; border-bottom: 1px solid rgba(35,64,35,.5); }
tr:hover td { background: rgba(53,224,26,.04); }
td.r, th.r { text-align: right; }
.tag { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.tag.green { background: rgba(53,224,26,.15); color: var(--green); }
.tag.gold { background: rgba(232,192,74,.15); color: var(--gold); }
.tag.gray { background: rgba(143,174,140,.15); color: var(--muted); }
.tag.red { background: rgba(255,93,93,.15); color: var(--red); }

/* cart */
.cart-line { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid rgba(35,64,35,.5); }
.cart-line .nm { flex: 1; font-weight: 600; }
.qtybtn { background: var(--panel2); border: 1px solid var(--border); color: var(--green); width: 28px; height: 28px; border-radius: 7px; cursor: pointer; font-weight: 800; font-size: 15px; }
.total-line { display: flex; justify-content: space-between; padding: 6px 0; font-size: 14.5px; }
.total-line.big { font-size: 20px; font-weight: 800; color: var(--green); border-top: 1px solid var(--border); margin-top: 6px; padding-top: 10px; }

/* toast */
#toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 99;
  background: var(--panel2); border: 1px solid var(--green); color: var(--text);
  padding: 13px 20px; border-radius: 10px; font-weight: 600;
  box-shadow: 0 4px 24px rgba(0,0,0,.5); display: none;
}
#toast.err { border-color: var(--red); }

/* bar chart (reports) */
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 13px; }
.bar-row .bl { width: 150px; color: var(--muted); text-align: right; flex-shrink: 0; }
.bar-row .track { flex: 1; background: var(--bg2); border-radius: 6px; height: 22px; overflow: hidden; }
.bar-row .fill { height: 100%; background: linear-gradient(90deg, var(--green-dim), var(--green)); border-radius: 6px; min-width: 2px; }
.bar-row .fill.exp { background: linear-gradient(90deg, #a03535, var(--red)); }
.bar-row .bv { width: 90px; font-weight: 700; }

.prod-thumb {
  width: 46px; height: 46px; object-fit: cover; border-radius: 8px;
  border: 1px solid var(--border); display: block; background: var(--bg2);
}
.prod-thumb.lg { width: 110px; height: 110px; margin-bottom: 8px; }
.prod-thumb.empty {
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; opacity: .45;
}
.prod-photo {
  width: 100%; height: 92px; object-fit: cover; border-radius: 8px;
  margin-bottom: 8px; background: var(--bg2);
}
input[type=file] {
  padding: 8px; font-size: 13px; color: var(--muted);
}

/* ---------- POS-80 receipt printing ---------- */
#printArea { display: none; }
@media print {
  @page { size: 80mm auto; margin: 2mm; }
  html, body { background: #fff !important; }
  .app, #toast { display: none !important; }
  #printArea {
    display: block !important;
    width: 72mm; color: #000; background: #fff;
    font-family: "Courier New", monospace; font-size: 11px; line-height: 1.45;
  }
  #printArea .pc { text-align: center; }
  #printArea .pt { font-size: 15px; font-weight: bold; }
  #printArea .hr { border-top: 1px dashed #000; margin: 4px 0; }
  #printArea .row { display: flex; justify-content: space-between; gap: 4px; }
  #printArea .row span:first-child { overflow: hidden; }
  #printArea .big { font-size: 13px; font-weight: bold; }
}

.branch-bar { margin: 14px 6px 0; }
.branch-bar select {
  background: var(--panel2); border: 1px solid var(--green-dim); color: var(--green);
  font-weight: 700; font-size: 13px; padding: 9px 8px; border-radius: 10px;
}
.branch-fixed {
  background: var(--panel2); border: 1px solid var(--border); color: var(--green);
  font-weight: 700; font-size: 12.5px; padding: 9px 8px; border-radius: 10px; text-align: center;
}
@media (max-width: 900px) { .branch-bar { font-size: 10px; } .branch-bar select { padding: 6px 2px; } }

.whoami { margin: 16px 6px 8px; padding: 10px; background: var(--panel); border: 1px solid var(--border);
           border-radius: 10px; text-align: center; }
.whoami .who-name { font-weight: 700; font-size: 13.5px; }
.whoami .who-role { color: var(--muted); font-size: 11.5px; margin-top: 2px; }
@media (max-width: 900px) { .whoami .who-name { display: none; } .whoami { padding: 6px 2px; } }

.chk { display: flex; align-items: center; gap: 8px; padding: 5px 0; cursor: pointer; font-size: 14px; }
.chk input { width: auto; }
details summary::-webkit-details-marker { color: var(--green); }

.notice {
  background: rgba(232,192,74,.10); border: 1px solid rgba(232,192,74,.45);
  color: var(--gold); border-radius: 10px; padding: 10px 14px;
  font-size: 13px; line-height: 1.5; margin-bottom: 16px;
}

.muted { color: var(--muted); }
.flex { display: flex; gap: 10px; align-items: center; }
.flex.between { justify-content: space-between; }
.mt { margin-top: 14px; }
.empty { text-align: center; color: var(--muted); padding: 30px 10px; font-size: 14px; }