:root{--bg:#f4f6fb;--card:#fff;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--brand:#1e3a8a;--brand2:#2563eb;--ok:#15803d;--warn:#b45309;--bad:#b91c1c}
@media (prefers-color-scheme:dark){:root{--bg:#0f172a;--card:#1e293b;--ink:#f1f5f9;--muted:#94a3b8;--line:#334155;--brand:#1e40af;--brand2:#60a5fa}}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Tamil",sans-serif;background:var(--bg);color:var(--ink);font-size:15px}
.hidden{display:none!important}
.muted{color:var(--muted)}.small{font-size:12px}.err{color:var(--bad);min-height:1.2em}
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.login .card{width:100%;max-width:360px;display:flex;flex-direction:column;gap:10px}
.login h1{margin:0;font-size:22px}
input,select,textarea{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);font:inherit}
label{display:block;font-size:12px;color:var(--muted);margin-bottom:3px}
.btn{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:8px 14px;border-radius:8px;cursor:pointer;font:inherit}
.btn.primary{background:var(--brand2);border-color:var(--brand2);color:#fff}
.btn.danger{color:var(--bad)}
.btn.small{padding:4px 10px;font-size:12px}
.icon-btn{background:none;border:0;font-size:22px;color:inherit;cursor:pointer}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--brand);color:#fff}
.top strong{flex:1}.top .btn{background:transparent;color:#fff;border-color:#ffffff66}
#nav{position:fixed;top:0;bottom:0;left:0;width:210px;padding:56px 8px 8px;background:var(--card);border-right:1px solid var(--line);overflow:auto;z-index:15;transition:transform .2s}
#nav a{display:block;padding:10px 12px;border-radius:8px;color:var(--ink);text-decoration:none;cursor:pointer}
#nav a.on{background:var(--brand2);color:#fff}
main{padding:14px;margin-left:210px;max-width:1200px}
@media (max-width:800px){#nav{transform:translateX(-100%)}#nav.open{transform:none;box-shadow:0 0 30px #0006}main{margin-left:0}}
@media (min-width:801px){#menuBtn{display:none}.top{margin-left:210px}}
.bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;align-items:center}
.bar input[type=search]{flex:1;min-width:150px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:14px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.stat b{display:block;font-size:20px;margin-top:2px}
.stat.bad b{color:var(--bad)}.stat.ok b{color:var(--ok)}
.tbl-wrap{overflow:auto;background:var(--card);border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;font-size:14px}
th{background:var(--bg);font-size:12px;text-transform:uppercase;color:var(--muted)}
td.num,th.num{text-align:right}
tr.click{cursor:pointer}tr.click:hover{background:var(--bg)}
.tag{padding:2px 8px;border-radius:99px;font-size:12px;background:var(--line)}
.tag.ok{background:#dcfce7;color:#166534}.tag.warn{background:#fef3c7;color:#92400e}.tag.bad{background:#fee2e2;color:#991b1b}
.modal{position:fixed;inset:0;background:#0008;z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:16px;overflow:auto}
.modal-box{background:var(--card);border-radius:12px;width:100%;max-width:720px;padding:16px;margin:auto}
.modal-box h2{margin-top:0}
.form{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.form .full{grid-column:1/-1}
.row-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:14px;flex-wrap:wrap}
.items{margin-top:8px}
.item-row{display:grid;grid-template-columns:3fr 70px 90px 80px 30px;gap:6px;margin-bottom:6px;align-items:center}
@media (max-width:600px){.item-row{grid-template-columns:1fr 1fr}.item-row select{grid-column:1/-1}}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#111827;color:#fff;padding:10px 18px;border-radius:99px;z-index:99}
h3{margin:18px 0 8px}
/* invoice */
.invoice{background:#fff;color:#000;padding:20px;font-size:13px;max-width:760px;margin:0 auto}
.invoice h2{margin:0;text-align:center}.invoice .c{text-align:center}
.invoice table{margin:10px 0}.invoice th,.invoice td{color:#000;border:1px solid #999;padding:4px 6px;font-size:12px}
.invoice th{background:#eee}
.invoice .tot{margin-left:auto;width:55%}.invoice .tot td{border:0;border-bottom:1px solid #ddd}
.invoice .tot tr:last-child td,.invoice .tot .b td{font-weight:700}
@media print{
  body *{visibility:hidden}
  #printArea,#printArea *{visibility:visible}
  #printArea{position:absolute;left:0;top:0;width:100%}
  .modal{position:static;background:none;padding:0}
  @page{size:A4;margin:10mm}
}
.pbox{position:relative}
.plist{position:absolute;z-index:60;left:0;right:0;top:100%;margin-top:2px;background:var(--card);border:1px solid var(--line);border-radius:8px;max-height:220px;overflow:auto;box-shadow:0 6px 20px #0003}
.popt{padding:9px 10px;cursor:pointer;border-bottom:1px solid var(--line)}
.popt:hover{background:var(--bg)}
@media (max-width:600px){.pbox{grid-column:1/-1}}
.cat-block{border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin-bottom:10px}
.cat-head{display:flex;justify-content:space-between;align-items:center;font-weight:600;margin-bottom:6px}
.pbox::after{content:'▾';position:absolute;right:10px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--muted)}.pbox input{padding-right:26px}.plist{max-height:260px}
.rx{display:grid;grid-template-columns:34px repeat(4,1fr);gap:6px;align-items:center;max-width:460px}.rx b{text-align:center;font-size:12px}.rx input{padding:7px 4px}

.report{background:#fff;color:#111;border:1px solid #ccc;border-radius:10px;padding:18px}
.report h2{margin:0}.report .rhead{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-bottom:3px solid #1e3a8a;padding-bottom:10px;margin-bottom:6px}
.report .rtitle{font-size:18px;font-weight:700;color:#1e3a8a}
.report .rh{background:#1e3a8a;color:#fff;padding:5px 10px;border-radius:6px;font-size:14px;margin:18px 0 8px}
.report .stat{background:#f8fafc;border:1px solid #d1d5db;color:#374151}.report .stat b{color:#111}.report .stat.ok b{color:#15803d}.report .stat.bad b{color:#b91c1c}
.report .tbl-wrap{background:#fff;border-color:#d1d5db}.report th{background:#e5e7eb;color:#111}.report td{white-space:normal;color:#111;border-color:#e5e7eb;font-size:13px}
.report tr.click{cursor:default}.report tr.click:hover{background:none}.report .rnote{color:#555}
.rx select.pw{padding:7px 0;text-align:center;text-align-last:center;font-size:13px}