:root{
  --bg:#0e1726; --panel:#16223a; --panel2:#1d2c49; --line:#27375a; --line2:#32477040;
  --text:#e7edf7; --muted:#93a4c4; --muted2:#6b7ea3;
  --accent:#2f6df6; --accent2:#4f8bff; --good:#1fb87a; --bad:#ef5b6b; --warn:#f0a83a;
  --head:#0a1322;
  --radius:10px; --mono:'JetBrains Mono',monospace;
}
*{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}
input,select,textarea{font-family:inherit}
a{color:var(--accent2);text-decoration:none}

/* ---------- login ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1200px 600px at 70% -10%,#1b2b4d55,transparent),var(--bg)}
.login-card{width:360px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:32px;
  box-shadow:0 30px 60px #00000055}
.brand{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#7aa2ff);
  display:grid;place-items:center;font-weight:800;color:#fff}
.brand h1{font-size:19px;margin:0}
.sub{color:var(--muted);font-size:12.5px;margin:2px 0 22px}
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;background:var(--head);border:1px solid var(--line);
  color:var(--text);border-radius:9px;padding:10px 12px;font-size:14px;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent)}
.btn{background:var(--accent);color:#fff;border:0;border-radius:9px;padding:10px 16px;font-weight:600;font-size:14px}
.btn:hover{background:var(--accent2)}
.btn.sec{background:var(--panel2);border:1px solid var(--line);color:var(--text)}
.btn.sm{padding:6px 11px;font-size:12.5px;border-radius:8px}
.btn.gho{background:transparent;border:1px solid var(--line);color:var(--muted)}
.btn.block{width:100%;justify-content:center}
.err{color:var(--bad);font-size:12.5px;margin-top:8px;min-height:16px}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:230px 1fr;min-height:100vh}
.side{background:var(--head);border-right:1px solid var(--line);padding:16px 12px;display:flex;flex-direction:column}
.side .brand{padding:4px 8px 16px}
.nav{display:flex;flex-direction:column;gap:2px;overflow:auto}
.nav .grp{font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted2);margin:14px 10px 6px}
.nav a{display:flex;align-items:center;gap:10px;padding:8px 11px;border-radius:8px;color:var(--muted);font-weight:500;font-size:13.5px}
.nav a:hover{background:#ffffff08;color:var(--text)}
.nav a.active{background:var(--accent);color:#fff}
.nav a .ic{width:16px;text-align:center;opacity:.9}
.side .foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}

.main{display:flex;flex-direction:column;min-width:0}
.topbar{height:56px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 20px;background:var(--panel)}
.topbar .co{font-weight:700}
.topbar .co small{display:block;color:var(--muted);font-weight:500;font-size:11px}
.topbar .sp{flex:1}
.content{padding:22px;overflow:auto;flex:1}
.page-h{display:flex;align-items:center;gap:12px;margin:0 0 18px}
.page-h h2{margin:0;font-size:20px}
.page-h .sp{flex:1}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card .k{color:var(--muted);font-size:12px}
.card .v{font-size:24px;font-weight:800;margin-top:6px}
.card .v.mono{font-family:var(--mono)}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.panel .ph{padding:12px 16px;border-bottom:1px solid var(--line);font-weight:600;display:flex;align-items:center;gap:10px}
.panel .ph .sp{flex:1}
.panel .pb{padding:4px}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line2)}
th{color:var(--muted);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.04em;background:#0c1526}
tbody tr:hover{background:#ffffff06}
td.num,th.num{text-align:right;font-family:var(--mono)}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600}
.tag.SALE{background:#1fb87a22;color:#49d39b}
.tag.PURCHASE{background:#4f8bff22;color:#7aa6ff}
.tag.RECEIPT{background:#f0a83a22;color:#f5c06a}
.tag.PAYMENT{background:#ef5b6b22;color:#ff8792}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.formrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}

/* entry grid (bill) */
.entry-grid{width:100%;border-collapse:collapse}
.entry-grid th{background:#0c1526}
.entry-grid td{padding:0;border-bottom:1px solid var(--line2)}
.entry-grid input,.entry-grid select{width:100%;background:transparent;border:0;color:var(--text);padding:9px 10px;font-size:13px;outline:none}
.entry-grid input:focus,.entry-grid select:focus{background:#2f6df61a;box-shadow:inset 0 0 0 1px var(--accent)}
.entry-grid td.num input{text-align:right;font-family:var(--mono)}
.totbox{display:flex;justify-content:flex-end;margin-top:14px}
.totcard{min-width:320px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:14px 18px}
.totcard .r{display:flex;justify-content:space-between;padding:4px 0;color:var(--muted)}
.totcard .r b{color:var(--text);font-family:var(--mono)}
.totcard .r.grand{border-top:1px solid var(--line);margin-top:8px;padding-top:10px;font-size:18px}
.totcard .r.grand b{color:#fff;font-weight:800}

.toast{position:fixed;bottom:22px;right:22px;background:var(--good);color:#04110b;padding:12px 18px;border-radius:10px;
  font-weight:600;box-shadow:0 12px 30px #0007;z-index:100;opacity:0;transform:translateY(8px);transition:.2s}
.toast.show{opacity:1;transform:none}
.toast.bad{background:var(--bad);color:#fff}

.modal-bg{position:fixed;inset:0;background:#030712bb;display:grid;place-items:center;z-index:90;padding:20px}
.modal{width:min(640px,96vw);max-height:90vh;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.modal .mh{padding:16px 20px;border-bottom:1px solid var(--line);font-weight:700;display:flex}
.modal .mb{padding:20px}
.modal .mf{padding:14px 20px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-end}
.muted{color:var(--muted)}
.right{text-align:right}
.hint{font-size:11.5px;color:var(--muted2)}
.kbd{font-family:var(--mono);background:var(--head);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:11px}
.pill{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:20px;padding:3px 10px}
.empty{padding:40px;text-align:center;color:var(--muted)}
@media(max-width:860px){.shell{grid-template-columns:1fr}.side{display:none}.cards{grid-template-columns:repeat(2,1fr)}}