:root{
  --bg:#f6f7fb; --panel:#fff; --border:#eceef3; --border2:#e3e6ee; --text:#111827; --muted:#6b7280; --faint:#9ca3af;
  --primary:#ff5a1f; --primary-d:#e84a12; --primary-bg:#fff0ea; --ink:#0b0b0c;
  --green:#16a34a; --green-bg:#e8f7ee; --red:#dc2626; --red-bg:#fdecec; --amber:#b45309; --amber-bg:#fdf3e3; --blue:#0369a1; --blue-bg:#e6f4fb;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
svg.i{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.muted{color:var(--muted)}
.right{text-align:right}

/* header */
header{background:var(--ink);position:sticky;top:0;z-index:30}
.bar{height:64px;display:flex;align-items:center;gap:20px;padding:0 24px;max-width:1400px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand img{height:22px;display:block}
.brand .prod{color:#fff;font-weight:600;font-size:13px;letter-spacing:.18em;border-left:1px solid #333;padding-left:10px}
nav.tabs{display:flex;gap:2px;background:rgba(255,255,255,.07);border-radius:12px;padding:4px;overflow-x:auto;scrollbar-width:none}
nav.tabs::-webkit-scrollbar{display:none}
nav.tabs a{padding:8px 16px;border-radius:9px;color:#c9c9ce;text-decoration:none;font-weight:500;display:flex;align-items:center;gap:7px;white-space:nowrap}
nav.tabs a:hover{color:#fff}
nav.tabs a.on{background:var(--primary);color:#fff}
.badge{background:var(--red);color:#fff;border-radius:99px;font-size:11px;padding:1px 7px;font-weight:600}
nav.tabs a.on .badge{background:#fff;color:var(--primary)}
.bar .spacer{flex:1}
.hbtn{height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.07);color:#e5e5e8;display:flex;align-items:center;gap:7px;padding:0 12px;font-weight:500;white-space:nowrap;text-decoration:none}
.hbtn:hover{background:rgba(255,255,255,.14)}
.hbtn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.hbtn.primary:hover{background:var(--primary-d)}

main{max-width:1400px;margin:0 auto;padding:24px}
.pagehead{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.pagehead h1{font-size:22px;margin:0;font-weight:650;letter-spacing:-.01em}
.pagehead .sub{color:var(--muted)}
.pagehead .spacer{flex:1}

/* buttons & inputs */
.btn{height:38px;border-radius:10px;border:1px solid var(--border2);background:#fff;color:#1f2937;padding:0 14px;display:inline-flex;align-items:center;gap:7px;font-weight:500;white-space:nowrap;text-decoration:none}
.btn:hover{background:#f3f4f8}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-d)}
.btn.dark{background:var(--ink);border-color:var(--ink);color:#fff}
.btn.danger{color:var(--red)}
.btn.sm{height:30px;padding:0 10px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.55;cursor:default}
.ibtn{width:30px;height:30px;border-radius:8px;border:1px solid transparent;background:none;display:inline-grid;place-items:center;color:var(--muted)}
.ibtn:hover{background:#f1f2f6;color:var(--text)}
.ibtn.danger:hover{color:var(--red);background:var(--red-bg)}
.input,select.input,textarea.input{height:38px;border:1px solid var(--border2);border-radius:10px;padding:0 12px;background:#fff;width:100%;outline:none}
textarea.input{height:auto;min-height:70px;padding:10px 12px;resize:vertical}
.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-bg)}
.search{position:relative;min-width:240px}
.search svg{position:absolute;left:12px;top:11px;color:var(--faint)}
.search .input{padding-left:36px}
label.f{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#374151;font-weight:500}
label.f .hint{font-weight:400;color:var(--muted);font-size:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.seg{display:inline-flex;background:#eef0f5;border-radius:10px;padding:3px}
.seg button{border:0;background:none;padding:6px 12px;border-radius:8px;color:var(--muted);font-weight:500}
.seg button.on{background:#fff;color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,.06)}

/* cards & tables */
.card{background:var(--panel);border:1px solid var(--border);border-radius:14px}
.card.pad{padding:18px}
.card h3{margin:0 0 12px;font-size:15px;font-weight:600}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.stat{padding:16px 18px}
.stat .k{color:var(--muted);font-size:13px}
.stat .v{font-size:24px;font-weight:650;margin-top:6px;letter-spacing:-.01em}
.stat .s{color:var(--faint);font-size:12px;margin-top:2px}
.stat.warn .v{color:var(--red)}
.cols{display:grid;grid-template-columns:1.4fr 1fr;gap:14px}
.tablewrap{overflow-x:auto}
@media (min-width:721px){ .tablewrap:has(.items){overflow:visible} }  /* let the product dropdown spill out */
.cols>*,.editor>*{min-width:0}                     /* grid children may shrink, so wide tables scroll inside their card */
table.t{width:100%;border-collapse:collapse}
table.t th{text-align:left;font-weight:500;color:var(--muted);font-size:12.5px;padding:10px 14px;border-bottom:1px solid var(--border);white-space:nowrap;background:#fafbfd}
table.t td{padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
table.t tr:last-child td{border-bottom:0}
table.t tr.click{cursor:pointer}
table.t tr.click:hover td{background:#fafbfd}
table.t th:first-child{border-top-left-radius:14px}
table.t th:last-child{border-top-right-radius:14px}
table.t th.right,table.t td.right{text-align:right}
table.t .acts{white-space:nowrap;text-align:right}
.empty{padding:40px 20px;text-align:center;color:var(--muted)}
.empty b{display:block;color:var(--text);font-size:15px;margin-bottom:4px}
.pill{display:inline-block;border-radius:99px;padding:2px 9px;font-size:12px;font-weight:600}
.pill.red{background:var(--red-bg);color:var(--red)}
.pill.green{background:var(--green-bg);color:var(--green)}
.pill.amber{background:var(--amber-bg);color:var(--amber)}
.pill.gray{background:#eef0f5;color:var(--muted)}
.owes{color:var(--red);font-weight:600}
.credit{color:var(--green);font-weight:600}
.list-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--border)}
.list-row:last-child{border-bottom:0}
.list-row a{text-decoration:none}
.list-row a:hover{color:var(--primary-d)}

/* invoice editor */
.editor{display:grid;grid-template-columns:1fr 330px;gap:16px;align-items:start}
.items th,.items td{padding:8px 8px}
.items td .input{height:36px}
.items .c-qty{width:90px}.items .c-price{width:120px}.items .c-total{width:120px}.items .c-x{width:40px}
.items td.c-total{text-align:right;font-weight:600}
.stockhint{font-size:11.5px;color:var(--faint);margin-top:3px}
.stockhint.bad{color:var(--red)}
.totals .row{display:flex;justify-content:space-between;align-items:center;padding:7px 0;gap:10px}
.totals .row .input{width:130px;text-align:right}
.totals .grand{font-size:20px;font-weight:700;border-top:1px solid var(--border);margin-top:6px;padding-top:12px}
.sticky{position:sticky;top:84px}
.ac{position:relative}
.ac-list{position:absolute;left:0;right:0;top:calc(100% + 4px);background:#fff;border:1px solid var(--border2);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.1);z-index:20;max-height:280px;overflow:auto}
.ac-list div{padding:8px 12px;cursor:pointer;display:flex;justify-content:space-between;gap:10px}
.ac-list div small{color:var(--muted);white-space:nowrap}
.ac-list div.on,.ac-list div:hover{background:var(--primary-bg)}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(10,10,12,.45);z-index:50;display:grid;place-items:center;padding:16px}
.modal{background:#fff;border-radius:16px;width:min(520px,100%);max-height:calc(100vh - 32px);overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal .mh{padding:18px 20px 0;display:flex;align-items:center;justify-content:space-between}
.modal .mh h2{margin:0;font-size:17px}
.modal .mb{padding:16px 20px;display:flex;flex-direction:column;gap:14px}
.modal .mf{padding:0 20px 18px;display:flex;justify-content:flex-end;gap:8px}
.err{color:var(--red);font-size:13px;min-height:0}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:10px;z-index:80;font-weight:500;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.toast.bad{background:var(--red)}

/* guide drawer */
.guide-bg{position:fixed;inset:0;background:rgba(10,10,12,.35);z-index:60}
.guide{position:fixed;top:0;right:0;bottom:0;width:min(460px,100%);background:#fff;z-index:61;display:flex;flex-direction:column;box-shadow:-10px 0 40px rgba(0,0,0,.15)}
.guide .gh{padding:18px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}
.guide .gh h2{margin:0;font-size:18px;flex:1}
.guide .gtabs{display:flex;gap:6px;padding:12px 20px;border-bottom:1px solid var(--border);overflow-x:auto;flex:none}
.guide .gtabs button{border:1px solid var(--border2);background:#fff;border-radius:99px;padding:5px 12px;white-space:nowrap;font-size:13px;color:#374151}
.guide .gtabs button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.guide .gbody{padding:18px 20px 30px;overflow:auto;line-height:1.55}
.guide .gbody h3{font-size:16px;margin:4px 0 10px}
.guide .gbody h4{font-size:14px;margin:18px 0 6px}
.guide .gbody ol,.guide .gbody ul{padding-left:20px;margin:6px 0}
.guide .gbody li{margin:5px 0}
.guide .tip{background:var(--primary-bg);border-radius:10px;padding:10px 12px;margin:14px 0;font-size:13.5px}
.guide kbd{background:#f1f2f6;border:1px solid var(--border2);border-bottom-width:2px;border-radius:5px;padding:0 5px;font-size:12px;font-family:inherit}
.guide .gb{display:inline-block;background:#f1f2f6;border-radius:6px;padding:0 6px;font-weight:600;font-size:13px}

/* printable paper (invoice / statement) */
.paper-wrap{display:flex;justify-content:center}
.paper{background:#fff;width:210mm;min-height:297mm;padding:14mm 14mm 12mm;box-shadow:0 2px 20px rgba(0,0,0,.08);border-radius:4px;color:#111;font-size:12.5px;display:flex;flex-direction:column}
.paper .ph{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;padding-bottom:14px;border-bottom:2px solid #111}
.paper .store{display:flex;gap:14px;align-items:flex-start}
.paper .store img{max-height:64px;max-width:150px;object-fit:contain}
.paper .store .nm{font-size:20px;font-weight:700}
.paper .store .tg{color:#555;margin-top:1px}
.paper .store .ct{color:#444;margin-top:6px;line-height:1.5;white-space:pre-line}
.paper .doc{text-align:right}
.paper .doc .ttl{font-size:24px;font-weight:800;letter-spacing:.06em}
.paper .doc table{margin-left:auto;margin-top:6px;border-collapse:collapse}
.paper .doc td{padding:2px 0 2px 14px}
.paper .doc td:first-child{color:#666}
.paper .billto{margin:16px 0 14px;display:flex;justify-content:space-between;gap:20px}
.paper .billto .lbl{font-size:11px;color:#666;text-transform:uppercase;letter-spacing:.08em;margin-bottom:3px}
.paper .billto .who{font-size:14px;font-weight:600}
.paper table.lines{width:100%;border-collapse:collapse}
.paper table.lines th{background:#111;color:#fff;font-weight:600;text-align:left;padding:7px 8px;font-size:12px}
.paper table.lines td{padding:7px 8px;border-bottom:1px solid #e5e5e5}
.paper table.lines .r{text-align:right}
.paper .sum{display:flex;justify-content:space-between;gap:20px;margin-top:14px}
.paper .sum .notes{flex:1;color:#444;white-space:pre-line}
.paper .sum table{border-collapse:collapse;min-width:250px}
.paper .sum td{padding:5px 8px}
.paper .sum td:last-child{text-align:right}
.paper .sum .tot td{font-size:15px;font-weight:700;border-top:2px solid #111}
.paper .sum .due td{font-weight:700;color:#b91c1c}
.paper .foot{margin-top:auto;padding-top:20px;text-align:center;color:#666;border-top:1px solid #e5e5e5}
.paper .void{color:#b91c1c;border:3px solid #b91c1c;font-weight:800;font-size:22px;padding:4px 14px;display:inline-block;transform:rotate(-6deg);margin-top:8px}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:16px;background:var(--ink)}
.login .box{background:#fff;border-radius:18px;padding:30px;width:min(380px,100%);display:flex;flex-direction:column;gap:14px}
.login .box img.logo{max-height:56px;max-width:180px;object-fit:contain;align-self:center}
.login h1{margin:0;font-size:20px;text-align:center}
.login .by{text-align:center;color:var(--muted);font-size:12.5px}

@media (max-width:1000px){
  .stats{grid-template-columns:1fr 1fr}
  .cols,.editor{grid-template-columns:1fr}
  .sticky{position:static}
}
@media (max-width:720px){
  .bar{height:auto;flex-wrap:wrap;padding:10px 16px;gap:10px}
  nav.tabs{order:5;width:100%}
  .brand .prod{display:none}
  .hbtn .lbl{display:none}
  main{padding:16px}
  .grid2,.grid3{grid-template-columns:1fr}
  .search{min-width:0;flex:1}
  .paper{width:100%;min-height:0;padding:16px}
  .paper .ph,.paper .billto,.paper .sum{flex-direction:column}
  .paper .doc{text-align:left}.paper .doc table{margin-left:0}
  .items .c-price,.items .c-total{width:90px}
}

@page{size:A4;margin:0}
@media print{
  body{background:#fff}
  header,.noprint,.toast{display:none!important}
  main{padding:0;max-width:none}
  .paper{box-shadow:none;border-radius:0;width:210mm;min-height:297mm}
}