:root{
  --bg:#eef1f6; --panel:#ffffff; --ink:#152033; --muted:#5b6678; --line:#d5dbe5;
  --brand:#0b3d91; --brand2:#0a2a63; --accent:#0e8f8f; --accent-soft:#e2f4f4;
  --warn:#b45309; --bad:#b91c1c; --good:#15803d; --field:#fffdf2; --focus:#ffe58a;
  --mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --sans:'Noto Sans','Noto Sans Devanagari',system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:14px/1.45 var(--sans);color:var(--ink);background:var(--bg);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--brand)}
h1,h2,h3{margin:.2em 0 .5em;line-height:1.25}
h1{font-size:1.4rem} h2{font-size:1.15rem} h3{font-size:1rem}
.muted{color:var(--muted)} .r{text-align:right} .c{text-align:center} .nowrap{white-space:nowrap}
.good{color:var(--good)} .bad{color:var(--bad)} .warn{color:var(--warn)}

/* top bar + menu */
.topbar{display:flex;align-items:center;gap:12px;background:var(--brand2);color:#dfe8ff;padding:4px 12px;font-size:12.5px}
.tb-firm{display:flex;gap:14px;align-items:center;flex-wrap:wrap;flex:1;min-width:0}
.tb-firm b{color:#fff;font-size:13.5px}
.tb-plan{background:#fde68a;color:#5b3b00;border-radius:10px;padding:1px 9px;text-decoration:none;font-weight:600}
.tb-plan.warn{background:#fecaca;color:#7f1d1d}
.tb-lang{color:#fff;border:1px solid #6d86c5;border-radius:12px;padding:1px 10px;text-decoration:none}
.menu-toggle{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer}
.menubar{display:flex;flex-wrap:wrap;background:var(--brand);position:sticky;top:0;z-index:50;box-shadow:0 2px 4px rgba(0,0,0,.15)}
.mb-home{color:#fff;text-decoration:none;font-size:18px;padding:5px 12px}
.mb-item{position:relative}
.mb-btn{background:none;border:0;color:#fff;font:15px var(--sans);padding:7px 11px;cursor:pointer}
.mb-btn:hover,.mb-item.open .mb-btn,.mb-btn:focus{background:#fff;color:var(--brand);outline:none}
.mb-drop{display:none;position:absolute;left:0;top:100%;min-width:260px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(10,30,70,.22);padding:4px 0;z-index:60}
.mb-item.open .mb-drop{display:block;max-height:calc(100vh - 90px);overflow-y:auto}
.mb-item:nth-last-child(-n+4) .mb-drop{left:auto;right:0}
.mb-drop a{display:flex;justify-content:space-between;gap:18px;padding:7px 16px;color:var(--ink);text-decoration:none;font-size:14.5px}
.mb-drop a:hover,.mb-drop a:focus{background:var(--brand);color:#fff;outline:none}
.mb-drop kbd{font:12px var(--mono);color:var(--muted)} .mb-drop a:hover kbd,.mb-drop a:focus kbd{color:#cfe0ff}
.mb-drop hr{border:0;border-top:1px solid var(--line);margin:4px 0}
body.alt-hint .mb-btn u{text-decoration:underline 2px}
.mb-btn u{text-decoration:underline}

main.wrap{flex:1;width:100%;max-width:1180px;margin:0 auto;padding:14px 16px 40px}
main.wrap.wide{max-width:none}
.statusbar{display:flex;justify-content:space-between;gap:10px;background:#dfe4ec;border-top:1px solid var(--line);font-size:12px;color:var(--muted);padding:3px 12px;position:sticky;bottom:0}

.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px;margin-bottom:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:14px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px 14px;text-decoration:none;color:var(--ink);display:block}
.stat small{display:block;color:var(--muted);font-size:12.5px}
.stat b{font-size:1.35rem;font-family:var(--mono)}
.stat.alert b{color:var(--bad)}
.flash{padding:9px 14px;border-radius:6px;margin-bottom:10px;border:1px solid}
.flash.ok{background:#ecfdf3;border-color:#a7e3bd;color:#14532d}
.flash.err{background:#fef2f2;border-color:#f3b4b4;color:#7f1d1d}
.flash.info{background:#eff6ff;border-color:#bfd5f7;color:#1e3a8a}

/* forms */
label{font-size:13px;color:var(--muted)}
input,select,textarea{font:14px var(--sans);color:var(--ink);border:1px solid #b9c3d3;border-radius:4px;padding:6px 8px;background:#fff;max-width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:0;background:var(--focus)}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px 14px}
.form-grid label{display:flex;flex-direction:column;gap:3px}
.form-grid .full{grid-column:1/-1}
.btn{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;background:var(--brand);color:#fff;border:1px solid var(--brand);border-radius:5px;padding:7px 14px;font:600 14px var(--sans);cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand2)}
.btn.ghost{background:#fff;color:var(--brand)}
.btn.danger{background:var(--bad);border-color:var(--bad)}
.btn.sm{padding:3px 9px;font-size:12.5px}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.filters{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:end;margin-bottom:12px;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.filters label{display:flex;flex-direction:column;gap:2px}

/* tables */
.tbl-wrap{overflow-x:auto;background:var(--panel);border:1px solid var(--line);border-radius:8px}
table.grid{width:100%;border-collapse:collapse;font-size:13.5px}
.grid th{background:var(--accent);color:#fff;text-align:left;font-weight:600;padding:7px 9px;white-space:nowrap;position:sticky;top:0}
.grid th.r{text-align:right}
.grid td{padding:6px 9px;border-top:1px solid #e6eaf0;vertical-align:top}
.grid tbody tr:hover{background:#f5f8fd}
.grid tfoot td{font-weight:700;background:#f1f4f9;border-top:2px solid var(--line)}
.grid td.r{font-family:var(--mono);font-size:13px;white-space:nowrap}
.grid .empty{text-align:center;color:var(--muted);padding:22px}
.tag{display:inline-block;font-size:11.5px;border-radius:9px;padding:0 7px;background:#e8edf6;color:#334}
.tag.h{background:#fde2e2;color:#8a1c1c}.tag.exp{background:#fee2e2;color:#991b1b}.tag.soon{background:#fef3c7;color:#92400e}

/* entry window (sale / purchase) — laid out like the desktop chemist screens */
.win{background:#c9cdd3;border:2px solid #24408e;border-radius:4px;box-shadow:0 4px 18px rgba(0,0,0,.15);font-family:var(--mono)}
.win-title{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(#fdfdfd,#e6e9ee);border:1px solid var(--line);border-bottom:0;border-radius:6px 6px 0 0;padding:5px 12px;font-size:13px;color:#333}
.win-head{display:grid;grid-template-columns:1fr 1fr;border-bottom:2px solid #24408e}
.win-head > div{padding:8px 12px;display:grid;grid-template-columns:auto 1fr auto 1fr;gap:3px 10px;align-items:center}
.win-head > div + div{border-left:2px solid #24408e}
.win label,.win .lbl{font:15px var(--mono);color:#0b1f6b;white-space:nowrap}
.win input,.win select{font:15px var(--mono);color:#9b1b1b;background:transparent;border:0;border-bottom:1px dashed #7d8aa8;border-radius:0;padding:2px 4px;min-width:0;width:100%}
.win input:focus,.win select:focus{background:#0b1f8f;color:#fff;outline:none}
.win input[readonly]{border-bottom-color:transparent}
.win .val{color:#9b1b1b;font:15px var(--mono)}
.win-title-big{font:600 19px var(--mono);letter-spacing:.45em;color:#0b1f6b;padding:6px 12px;border-bottom:2px solid #24408e}
.lines{width:100%;border-collapse:collapse;font:14px var(--mono)}
.lines th{background:#118f8f;color:#5b0a0a;font-weight:400;text-align:left;padding:4px 6px;font-size:14.5px;white-space:nowrap}
.lines th.r{text-align:right}
.lines td{padding:0 2px;border-right:1px solid #24408e;height:28px}
.lines td:last-child{border-right:0}
.lines td input{border:0;font:14px var(--mono);color:#0b1f6b;padding:3px 4px}
.lines td.r input,.lines td.r{text-align:right}
.lines tbody tr.cur{background:#dfe6ff}
.lines .rm{background:none;border:0;color:#9b1b1b;cursor:pointer;font-size:16px}
.lines-box{height:clamp(150px,calc(100vh - 520px),52vh);overflow:auto;border-bottom:2px solid #24408e;background:#c9cdd3}
.win-foot{display:grid;grid-template-columns:1.6fr 1fr;border-top:0}
.win-foot > div{padding:6px 12px}
.win-foot > div + div{border-left:2px solid #24408e}
.info-grid{display:grid;grid-template-columns:repeat(4,auto 1fr);gap:2px 10px;font:14px var(--mono);color:#0b1f6b}
.info-grid span:nth-child(even){color:#9b1b1b}
.totals{display:grid;grid-template-columns:1fr auto;gap:2px 12px;font:15px var(--mono);color:#0b1f6b}
.totals b{color:#9b1b1b;text-align:right}
.totals .net{font-size:20px;font-weight:600}
.win-keys{text-align:center;font:14px var(--mono);color:#0b1f6b;padding:4px;border-top:2px solid #24408e}
.win-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;justify-content:flex-end;padding:8px 12px;background:#e3e6ea}

/* product finder popup */
.pop{position:fixed;z-index:200;background:#fff;border:2px solid #24408e;box-shadow:0 10px 30px rgba(0,0,0,.3);max-height:60vh;overflow:auto;min-width:640px;font:13.5px var(--mono)}
.pop table{border-collapse:collapse;width:100%}
.pop th{background:#24408e;color:#fff;padding:4px 8px;text-align:left;position:sticky;top:0;font-weight:400}
.pop td{padding:4px 8px;border-top:1px solid #e3e6ee;white-space:nowrap}
.pop tr.sel td{background:#0b1f8f;color:#fff}
.pop .x td{color:#b91c1c}
.pop tr.sel.x td{color:#ffd0d0}
.pop .hint{padding:4px 8px;background:#f1f3f8;color:var(--muted);font-size:12px}

.modal-bg{position:fixed;inset:0;background:rgba(10,20,40,.45);display:flex;align-items:center;justify-content:center;z-index:300;padding:16px}
.modal{background:#fff;border-radius:8px;max-width:560px;width:100%;padding:18px;max-height:90vh;overflow:auto}

/* login / public */
body.public{background:linear-gradient(135deg,#0a2a63,#0e8f8f)}
.auth{max-width:420px;margin:6vh auto;background:#fff;border-radius:12px;padding:26px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.auth h1{color:var(--brand)}
.auth label{display:flex;flex-direction:column;gap:4px;margin-bottom:10px}
.auth input,.auth select{padding:9px 10px;font-size:15px}
.auth .btn{width:100%;justify-content:center;padding:10px}
.hero{max-width:1000px;margin:0 auto;padding:40px 16px;color:#fff}
.hero h1{font-size:2.2rem}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:24px 0}
.features div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:10px;padding:14px}

@media (max-width:900px){
  .menu-toggle{display:block}
  .menubar{display:none;flex-direction:column}
  body.menu-open .menubar{display:flex}
  .mb-drop{position:static;box-shadow:none;border:0;min-width:0}
  .mb-btn{width:100%;text-align:left}
  .win-head,.win-foot{grid-template-columns:1fr}
  .win-head > div + div,.win-foot > div + div{border-left:0;border-top:2px solid #24408e}
  .win-head > div{grid-template-columns:auto 1fr}
  .info-grid{grid-template-columns:auto 1fr}
  .pop{min-width:0;left:8px!important;right:8px}
  .tb-firm span{display:none}
  .cards{grid-template-columns:1fr 1fr;gap:8px}
  .stat b{font-size:1.1rem}
  .statusbar span:nth-child(2){display:none}
  .win-head > div > *{grid-column:auto!important}
  .win-title-big{letter-spacing:.08em;font-size:15px}
  .lines-box{height:auto;min-height:160px;max-height:none}
  .lines{min-width:760px}
  .win-foot .totals{font-size:14px}
  .win-bar{justify-content:stretch}.win-bar .btn{flex:1 1 auto;justify-content:center}
  main.wrap{padding:10px 10px 40px}
}
@media print{
  .topbar,.menubar,.statusbar,.filters,.actions,.no-print,.flash{display:none!important}
  body{background:#fff}
  main.wrap{max-width:none;padding:0}
  .tbl-wrap,.card{border:0}
  .grid th{background:#ddd;color:#000}
}

.btn u{text-decoration:underline}