:root{
  --navy:#0b2a4a; --navy2:#123d66; --teal:#0e9aa7; --teal-soft:#e3f5f6;
  --bg:#f3f6fa; --card:#fff; --ink:#1b2430; --muted:#6b7787; --line:#e2e8f0;
  --green:#16a34a; --green-soft:#dcfce7; --red:#dc2626; --red-soft:#fee2e2; --amber:#d97706; --amber-soft:#fef3c7;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:Inter,"Hind Siliguri",system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--teal);text-decoration:none}
button,input,select,textarea{font:inherit}
.loading{padding:60px;text-align:center;color:var(--muted)}

/* layout */
.shell{display:flex;min-height:100vh}
.side{width:220px;background:var(--navy);color:#cfe0f2;flex-shrink:0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side .brand{display:flex;align-items:center;gap:10px;padding:18px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.side .brand img{width:38px;height:38px;border-radius:8px;background:#fff}
.side .brand b{color:#fff;display:block;font-size:15px}
.side .brand span{font-size:11px;opacity:.7}
.side nav{padding:10px 8px;flex:1}
.side nav a{display:flex;align-items:center;gap:10px;color:#cfe0f2;padding:10px 12px;border-radius:8px;margin-bottom:2px;font-weight:500}
.side nav a:hover{background:rgba(255,255,255,.06)}
.side nav a.on{background:var(--teal);color:#fff}
.side .me{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);font-size:12px}
.side .me button{margin-top:6px;background:none;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:6px;padding:5px 10px;cursor:pointer}
.main{flex:1;min-width:0;padding:22px 26px 60px}
.topbar{display:none}
h1{font-size:22px;margin:0 0 16px}
h2{font-size:16px;margin:0 0 12px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}

/* cards / stats */
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:16px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:16px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat small{color:var(--muted);font-weight:500;display:block;margin-bottom:6px}
.stat b{font-size:20px}
.stat.due b{color:var(--red)} .stat.ok b{color:var(--green)} .stat.profit b{color:var(--teal)}

/* forms */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px 14px}
label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:4px}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--teal-soft);border-color:var(--teal)}
textarea{min-height:70px;resize:vertical}
.btn{display:inline-flex;align-items:center;gap:6px;border:0;border-radius:8px;padding:9px 15px;font-weight:600;cursor:pointer;background:var(--teal);color:#fff;white-space:nowrap}
.btn:hover{filter:brightness(1.05)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid #cbd5e1}
.btn.navy{background:var(--navy)}
.btn.red{background:var(--red)}
.btn.green{background:#25d366}
.btn.sm{padding:6px 10px;font-size:12px}
.btn:disabled{opacity:.5;cursor:default}
.svc-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.svc-tabs button{border:1px solid #cbd5e1;background:#fff;border-radius:999px;padding:7px 14px;cursor:pointer;font-weight:600}
.svc-tabs button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.section-title{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--teal);font-weight:700;margin:16px 0 8px}
.hint{font-size:12px;color:var(--muted)}

/* table */
.tbl-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;background:#fff}
.tbl th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:9px 10px;border-bottom:1px solid var(--line);white-space:nowrap;background:#f8fafc}
.tbl td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr.click{cursor:pointer}
.tbl tr.click:hover td{background:#f8fbff}
.num{text-align:right;white-space:nowrap}
.seal{display:inline-block;font-size:11px;font-weight:700;padding:3px 8px;border-radius:999px}
.seal.PAID{background:var(--green-soft);color:var(--green)}
.seal.DUE{background:var(--red-soft);color:var(--red)}
.seal.CANCELLED{background:#e5e7eb;color:#6b7280}
.muted{color:var(--muted)}
.work{display:inline-block;font-size:11px;font-weight:700;padding:3px 8px;border-radius:999px;white-space:nowrap;margin-top:3px}
.work.Processing{background:var(--amber-soft);color:var(--amber)}
.work.Done{background:var(--green-soft);color:var(--green)}
.work.Delivered{background:#dbeafe;color:#1d4ed8}
.work.Rejected{background:var(--red-soft);color:var(--red)}
a.stat{text-decoration:none}
.only-m{display:none}
.tag{display:inline-block;font-size:11px;background:var(--teal-soft);color:#0b6b74;border-radius:6px;padding:2px 7px;font-weight:600}

/* login */
.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,var(--navy),#0e5f80)}
.login .box{background:#fff;border-radius:16px;padding:30px;width:min(380px,92vw);box-shadow:0 20px 50px rgba(0,0,0,.25)}
.login img{width:180px;display:block;margin:0 auto 14px}
.login h1{text-align:center;font-size:18px}
.login .err{color:var(--red);font-size:13px;min-height:18px;margin:8px 0}

/* toast */
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:11px 18px;border-radius:10px;opacity:0;pointer-events:none;transition:.25s;z-index:99;max-width:90vw}
#toast.show{opacity:1}
#toast.bad{background:var(--red)}

/* invoice */
.inv-tools{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.invoice{background:#fff;width:210mm;max-width:100%;min-height:290mm;margin:0 auto;padding:14mm 14mm 12mm;position:relative;color:#1b2430;box-shadow:0 4px 20px rgba(0,0,0,.08);font-size:12.5px}
.inv-head{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:3px solid var(--navy);padding-bottom:12px}
.inv-head img{height:70px}
.inv-head .co{text-align:right;font-size:11.5px;line-height:1.5;color:#334155;max-width:60%}
.inv-head .co b{font-size:17px;color:var(--navy)}
.inv-title{display:flex;justify-content:space-between;margin:16px 0 12px;gap:16px}
.inv-title h2{font-size:26px;letter-spacing:.12em;color:var(--navy);margin:0}
.inv-meta td{padding:2px 0 2px 12px;font-size:12px}
.inv-meta td:first-child{color:#64748b;padding-left:0}
.billto{background:#f1f6fb;border-left:4px solid var(--teal);padding:9px 12px;border-radius:4px;margin-bottom:14px;line-height:1.55}
.inv-items{width:100%;border-collapse:collapse}
.inv-items th{background:var(--navy);color:#fff;font-size:11px;text-align:left;padding:8px}
.inv-items td{padding:8px;border-bottom:1px solid #e2e8f0;vertical-align:top}
.inv-items .num{text-align:right}
.inv-sum{display:flex;justify-content:space-between;gap:20px;margin-top:14px}
.inv-sum table{border-collapse:collapse;min-width:240px}
.inv-sum td{padding:5px 8px}
.inv-sum tr.total td{border-top:2px solid var(--navy);font-weight:800;font-size:14px}
.inv-sum tr.due td{color:var(--red);font-weight:700}
.words{font-style:italic;color:#475569;font-size:12px;max-width:55%}
.stamp{align-self:center;transform:rotate(-14deg);white-space:nowrap;border:5px double;border-radius:12px;padding:6px 18px;font-size:34px;font-weight:900;letter-spacing:.12em;opacity:.8}
.stamp.PAID{color:var(--green);border-color:var(--green)}
.stamp.DUE{color:var(--red);border-color:var(--red)}
.stamp.CANCELLED{color:#6b7280;border-color:#6b7280}
.banks{display:grid;grid-template-columns:1fr 1fr;gap:6px 14px;font-size:11px;margin-top:6px}
.banks div{border:1px solid #e2e8f0;border-radius:6px;padding:6px 8px;line-height:1.45}
.inv-foot{display:flex;justify-content:space-between;align-items:flex-end;margin-top:26px;gap:20px}
.sign{text-align:center;min-width:180px}
.sign img{height:50px;display:block;margin:0 auto 2px}
.sign .line{border-top:1px solid #334155;padding-top:4px;font-size:11.5px}
.thanks{text-align:center;color:#64748b;font-size:11px;margin-top:20px;border-top:1px solid #e2e8f0;padding-top:8px}

@media (max-width:820px){
  .shell{display:block}
  .side{position:fixed;left:-240px;top:0;z-index:50;transition:.2s;width:230px}
  .side.open{left:0;box-shadow:0 0 0 100vmax rgba(0,0,0,.35)}
  .topbar{display:flex;align-items:center;gap:10px;background:var(--navy);color:#fff;padding:10px 14px;position:sticky;top:0;z-index:40}
  .topbar button{background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
  .main{padding:16px 14px 60px}
  .hide-m{display:none}
  .invoice{padding:8mm;font-size:11px;min-height:0}
  .stamp{font-size:20px}
  .invoice{width:auto}
  .inv-sum{flex-wrap:wrap}
  .banks{grid-template-columns:1fr}
  /* tables marked .cards turn into one card per row on phones */
  .tbl.cards, .tbl.cards tbody{display:block}
  .tbl.cards tr:first-child{display:none}
  .tbl.cards tr{display:block;border-bottom:8px solid var(--bg);padding:6px 4px}
  .tbl.cards td{display:flex;justify-content:space-between;gap:12px;border:0;padding:5px 10px;text-align:right}
  .tbl.cards td::before{content:attr(data-l);color:var(--muted);font-size:12px;font-weight:600;text-align:left;flex-shrink:0}
  .tbl.cards td[data-l="Change"]{flex-wrap:wrap;justify-content:flex-end}
  .only-m{display:inline}
}
@media print{
  @page{size:A4;margin:0}
  body{background:#fff}
  .side,.topbar,.inv-tools,#toast,.no-print{display:none !important}
  .main{padding:0}
  .invoice{box-shadow:none;width:210mm;min-height:296mm;margin:0;font-size:12.5px;padding:14mm}
  .stamp{font-size:34px}
  .inv-sum{flex-wrap:nowrap}
  .banks{grid-template-columns:1fr 1fr}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}