:root{
  --bg:#e9ecef; --panel:#f6f6f6; --card:#fff; --line:#b9bfc6; --line2:#d5d9de;
  --ink:#1c2530; --muted:#6a7580; --blue:#1f4e8c; --blue2:#2f6db5; --green:#4f9a1e;
  --danger:#b3261e; --field:#ececec; --field-edit:#fff;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme=light]){
    --bg:#14181d; --panel:#1d2329; --card:#232a31; --line:#3a444e; --line2:#2d363e;
    --ink:#e6ebf0; --muted:#98a4b0; --blue:#6aa0e6; --blue2:#4f86cf; --field:#2a323a; --field-edit:#303a43;
  }
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font:14px/1.35 "Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
.hidden{display:none!important}
.muted{color:var(--muted)}
.error{color:var(--danger);font-size:13px}
.spacer{flex:1}

/* buttons / inputs */
.btn{font:inherit;padding:6px 14px;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:4px;cursor:pointer;white-space:nowrap}
.btn:hover:not(:disabled){background:var(--field)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--blue2);border-color:var(--blue);color:#fff;font-weight:600}
.btn.primary:hover:not(:disabled){background:var(--blue)}
.btn.danger{color:var(--danger);border-color:var(--danger)}
.btn.small{padding:3px 9px;font-size:12px}
input,select,textarea{font:inherit;color:var(--ink);border:1px solid var(--line);border-radius:3px;padding:5px 7px;background:var(--field-edit);min-width:0}
input:focus,select:focus,textarea:focus{outline:2px solid var(--blue2);outline-offset:-1px}
textarea{width:100%;resize:vertical}
.chk{display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.chk input{padding:0}

/* shell */
.topbar{display:flex;align-items:center;gap:12px;padding:8px 16px;background:var(--blue);color:#fff}
.topbar .muted{color:#cfe0f7}
.topbar .btn{background:transparent;color:#fff;border-color:#9bb8e0}
.brand{font-weight:700;font-size:16px;display:flex;align-items:center;gap:8px}
.brand.big{font-size:22px;justify-content:center}
.logo{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:6px;background:#fff;color:var(--blue);font-weight:800}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:8px 16px;background:var(--panel);border-bottom:1px solid var(--line)}
.sep{width:1px;height:22px;background:var(--line)}
.layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:0;height:calc(100vh - 100px);min-height:520px}

/* list */
.list-pane{display:flex;flex-direction:column;border-right:1px solid var(--line);background:var(--card);min-height:0}
.list-pane>input[type=search]{margin:10px 10px 6px}
.filters{display:flex;gap:8px;align-items:center;padding:0 10px 8px}
.filters select{flex:1}
.list-head{display:flex;align-items:center;justify-content:space-between;padding:6px 10px;border-top:1px solid var(--line2);border-bottom:1px solid var(--line2);background:var(--panel);font-size:12px;color:var(--muted)}
#vendorList{list-style:none;margin:0;padding:0;overflow:auto;flex:1}
#vendorList li{display:flex;gap:8px;align-items:center;padding:7px 10px;border-bottom:1px solid var(--line2);cursor:pointer}
#vendorList li:hover{background:var(--panel)}
#vendorList li.sel{background:var(--blue2);color:#fff}
#vendorList li.sel small{color:#dbe8fa}
#vendorList li.inactive .nm{text-decoration:line-through;opacity:.6}
#vendorList .nm{font-weight:600;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#vendorList small{color:var(--muted);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#vendorList .txt{min-width:0;flex:1}
.empty-list{padding:20px;text-align:center;color:var(--muted)}

/* detail (QuickBooks-like window) */
.detail-pane{padding:14px;overflow:auto;min-height:0;min-width:0}
.empty{max-width:520px;margin:60px auto;text-align:center}
.window{background:var(--bg);border:1px solid var(--line);max-width:980px}
.win-head{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--panel);border-bottom:1px solid var(--line)}
.win-head .inline{display:flex;align-items:center;gap:10px;font-size:11px;color:var(--muted);letter-spacing:.04em}
.big-name input{font-size:16px;font-weight:700;width:min(420px,60vw)}
.credit{font-size:11px;color:var(--muted);letter-spacing:.04em}
.credit b{font-size:15px;color:var(--ink);margin-left:4px}
.chip{display:inline-block;margin-left:8px;padding:1px 8px;border-radius:10px;font-size:11px;background:var(--line2);color:var(--ink)}
.chip.off{background:#f3c9c6;color:#7a1610}
.win-body{display:grid;grid-template-columns:150px minmax(0,1fr);min-height:420px}
.vtabs{display:flex;flex-direction:column;gap:3px;padding:10px 0 10px 8px}
.vtabs button{font:inherit;text-align:left;padding:9px 10px;border:1px solid var(--line);border-right:none;border-radius:6px 0 0 6px;background:var(--line2);color:var(--ink);cursor:pointer;font-weight:600}
.vtabs button small{display:block;font-weight:400;font-size:10.5px;color:var(--muted)}
.vtabs button.active{background:var(--card);position:relative;z-index:2;margin-right:-1px;box-shadow:-1px 0 0 var(--blue2) inset}
.panels{background:var(--card);border:1px solid var(--line);margin:10px 10px 10px 0;padding:16px 16px 10px;min-width:0}
.row{display:flex;align-items:center;gap:8px;margin-bottom:9px}
.row.col{flex-direction:column;align-items:stretch;gap:3px}
.lbl{font-size:10.5px;letter-spacing:.05em;color:var(--muted);text-transform:uppercase;width:108px;text-align:right;flex:none}
.row.col .lbl{text-align:left;width:auto}
.lbl.mini{width:auto}
.lbl.tag{background:var(--field);border:1px solid var(--line);border-radius:3px;padding:5px 6px;text-align:left;color:var(--ink);text-transform:none;font-size:12.5px;letter-spacing:0;width:100px}
.lbl.tag.green{background:var(--green);border-color:var(--green);color:#fff}
.grow{flex:1;min-width:0}
.w-wide{flex:1;max-width:420px}.w-md{width:160px}.w-sm{width:90px}.w-xs{width:60px}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 22px}
fieldset.addr{border:1px solid var(--line);margin:10px 0 0;padding:10px 12px 4px}
fieldset.addr legend{font-size:10.5px;letter-spacing:.06em;color:var(--muted);padding:0 6px}
.addr-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:18px}
.preview{margin:4px 0 0;background:var(--field);border:1px solid var(--line);border-radius:3px;padding:8px;min-height:92px;font:13px/1.45 inherit;white-space:pre-wrap}
.win-foot{display:flex;align-items:center;gap:10px;padding:10px 14px;border-top:1px solid var(--line)}
.notice{background:var(--panel);border:1px dashed var(--line);padding:8px 10px;margin-bottom:12px;font-size:13px;display:flex;gap:10px;align-items:center;justify-content:space-between}
.login-row{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.login-row .lbl{width:64px}
.login-row input{flex:1}
.masked input{-webkit-text-security:disc;text-security:disc}

/* read-only (view) mode look */
.window.view input,.window.view select,.window.view textarea{background:var(--field);border-color:var(--line2)}
.window.view select{pointer-events:none}
.window.view .win-foot .btn,.window.view #formMsg{visibility:hidden}

/* overlays */
.overlay{position:fixed;inset:0;background:rgba(10,18,28,.55);display:grid;place-items:center;z-index:20;padding:16px}
.card{background:var(--card);border-radius:8px;box-shadow:0 12px 40px rgba(0,0,0,.35)}
.login-card{width:340px;padding:26px;display:flex;flex-direction:column;gap:12px}
.login-card label,.modal label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}
.modal{width:min(640px,100%);max-height:90vh;overflow:auto;padding:20px;display:flex;flex-direction:column;gap:12px}
.modal h3{margin:0}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;margin-top:4px}
#impResult .sum{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:6px 0}
#impResult .sum div{background:var(--panel);border:1px solid var(--line2);border-radius:6px;padding:8px;text-align:center}
#impResult .sum b{display:block;font-size:20px}
#impResult table{width:100%;border-collapse:collapse;font-size:12px;margin-top:6px}
#impResult td,#impResult th{border-bottom:1px solid var(--line2);padding:3px 5px;text-align:left}
#impResult .warn{font-size:12px;color:#8a5a00;max-height:100px;overflow:auto;margin-top:6px}
.lklist{list-style:none;margin:0;padding:0;max-height:280px;overflow:auto;border:1px solid var(--line2)}
.lklist li{display:flex;justify-content:space-between;padding:4px 8px;border-bottom:1px solid var(--line2)}
.lklist button{border:none;background:none;color:var(--danger);cursor:pointer;font-size:16px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#16202b;color:#fff;padding:10px 18px;border-radius:6px;z-index:40;box-shadow:0 4px 16px rgba(0,0,0,.35)}
.toast.err{background:var(--danger)}

/* responsive */
@media (max-width:1250px){.grid2,.addr-grid{grid-template-columns:minmax(0,1fr)}}
@media (max-width:900px){
  .layout{grid-template-columns:1fr;height:auto}
  .list-pane{border-right:none;border-bottom:1px solid var(--line);max-height:320px}
  .win-body{grid-template-columns:1fr}
  .vtabs{flex-direction:row;flex-wrap:wrap;padding:8px}
  .vtabs button{border-right:1px solid var(--line);border-radius:6px}
  .vtabs button small{display:none}
  .panels{margin:0 8px 8px}
  .grid2,.addr-grid{grid-template-columns:1fr}
  .lbl{width:90px}
}