:root{
  --bg:#f3f5f8;--panel:#fff;--ink:#1e2430;--muted:#6b7280;--line:#dfe3ea;--line2:#eef0f4;
  --brand:#1f4e8c;--brand2:#2d6bc4;--brand-ink:#fff;--accent:#0f9d58;--danger:#c0392b;--warn:#b7791f;
  --side:#1b2a41;--side-ink:#c9d3e3;--side-active:#2b4266;--radius:6px;--shadow:0 1px 2px rgba(20,30,50,.08);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font:14px/1.45 var(--font);color:var(--ink);background:var(--bg)}
a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .5em;font-weight:600;line-height:1.25}
h1{font-size:20px}h2{font-size:17px}h3{font-size:15px}
p{margin:0 0 .8em}
code,pre{font-family:var(--mono);font-size:12.5px}
pre{white-space:pre-wrap;background:#f7f8fa;border:1px solid var(--line);padding:10px;border-radius:var(--radius)}
hr{border:0;border-top:1px solid var(--line);margin:14px 0}
.muted{color:var(--muted)}.small{font-size:12px}.right{text-align:right}.center{text-align:center}.nowrap{white-space:nowrap}
.mono{font-family:var(--mono)}.strong{font-weight:600}.neg{color:var(--danger)}.pos{color:var(--accent)}
.hidden{display:none!important}

/* layout */
.app{display:flex;min-height:100vh}
.sidebar{width:230px;flex:0 0 230px;background:var(--side);color:var(--side-ink);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand a{color:#fff;font-weight:600;display:flex;align-items:center;gap:8px;font-size:15px}
.brand a:hover{text-decoration:none}
.logo{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:7px;background:var(--brand2);color:#fff;font-weight:700;font-size:13px;letter-spacing:.5px}
.sidebar nav{padding:8px 0;flex:1}
.nav-group{margin:1px 0}
.nav-head{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;color:var(--side-ink);font-weight:500}
.nav-head:hover{background:rgba(255,255,255,.05);text-decoration:none;color:#fff}
.nav-head.active{color:#fff}
.chev{width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg);transition:transform .15s;opacity:.6}
.nav-group.open .chev{transform:rotate(45deg)}
.nav-items{display:none;background:rgba(0,0,0,.18);padding:4px 0}
.nav-group.open .nav-items{display:block}
.nav-items a{display:block;padding:6px 16px 6px 30px;color:var(--side-ink);font-size:13px}
.nav-items a:hover{color:#fff;text-decoration:none;background:rgba(255,255,255,.04)}
.nav-items a.active{color:#fff;background:var(--side-active);border-left:3px solid var(--brand2);padding-left:27px}
.sidebar-foot{padding:10px 16px;font-size:11px;opacity:.5}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:14px;padding:10px 22px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar h1{margin:0;flex:1;font-size:18px}
.topbar-right{display:flex;align-items:center;gap:16px}
.quick-search input{width:260px;padding:6px 10px;border:1px solid var(--line);border-radius:20px;font:inherit;background:#f7f8fa}
.user-menu{display:flex;align-items:center;gap:12px;font-size:13px}
.menu-btn{display:none;background:none;border:0;font-size:22px;cursor:pointer;color:var(--ink)}
.content{padding:20px 22px;max-width:1500px;width:100%}

/* cards, toolbar */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;margin-bottom:16px}
.card.tight{padding:0}
.card h2{margin-bottom:12px}
.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px}
.toolbar .spacer{flex:1}
.toolbar form{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px}
.stat .value{font-size:22px;font-weight:600;margin-top:4px}
.stat .sub{font-size:12px;color:var(--muted);margin-top:2px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--ink);font:inherit;font-weight:500;cursor:pointer;line-height:1.3;white-space:nowrap}
.btn:hover{background:#f4f6f9;text-decoration:none;border-color:#c9d0da}
.btn.primary{background:var(--brand2);border-color:var(--brand2);color:#fff}.btn.primary:hover{background:var(--brand)}
.btn.success{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.danger{color:var(--danger);border-color:#e6b2ad}.btn.danger:hover{background:#fdf1f0}
.btn.sm{padding:3px 8px;font-size:12px}
.btn.link{border:0;background:none;color:var(--brand2);padding:0}
.btn:disabled,.btn.disabled{opacity:.5;pointer-events:none}
.btn-group{display:inline-flex;gap:6px;flex-wrap:wrap}

/* forms */
form label{display:block;margin-bottom:10px;font-size:13px;color:#374151}
form label>span.lbl,label .lbl{display:block;margin-bottom:3px;font-weight:500}
input[type=text],input[type=number],input[type=email],input[type=password],input[type=date],input[type=search],input[type=tel],input[type=url],select,textarea{
  width:100%;padding:6px 8px;border:1px solid #c9d0da;border-radius:var(--radius);font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #bcd3f5;border-color:var(--brand2)}
input[readonly]{background:#f7f8fa}
textarea{min-height:64px;resize:vertical}
input.num,td.num input,input[type=number]{text-align:right}
.form-row{display:flex;gap:14px;flex-wrap:wrap}
.form-row>label{flex:1;min-width:140px}
.form-row>label.w-sm{flex:0 0 120px}.form-row>label.w-md{flex:0 0 200px}.form-row>label.w-lg{flex:2}
.form-actions{display:flex;gap:8px;align-items:center;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.check{display:flex;align-items:center;gap:6px;font-weight:normal}
.check input{width:auto}
fieldset{border:1px solid var(--line);border-radius:var(--radius);padding:10px 14px;margin:0 0 14px}
legend{font-weight:600;font-size:13px;padding:0 6px}
.inline-form{display:inline}
.help{font-size:12px;color:var(--muted);margin-top:2px}

/* tables */
table.data{width:100%;border-collapse:collapse;background:var(--panel)}
table.data th,table.data td{padding:7px 9px;border-bottom:1px solid var(--line2);text-align:left;vertical-align:top}
table.data th{background:#f7f8fa;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.3px;color:#4b5563;border-bottom:1px solid var(--line);white-space:nowrap}
table.data th.num,table.data td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.data tbody tr:hover{background:#fbfcfe}
table.data tr.total td{font-weight:600;border-top:2px solid var(--line);background:#fafbfc}
table.data tr.sub td{font-weight:600;background:#f7f8fa}
table.data tr.void td{color:var(--muted);text-decoration:line-through}
table.data td.actions{white-space:nowrap;text-align:right}
table.data a.row-link{color:var(--ink);font-weight:500}
.table-wrap{overflow-x:auto}
table.data.compact th,table.data.compact td{padding:4px 7px}
table.data .indent-1{padding-left:24px}table.data .indent-2{padding-left:40px}table.data .indent-3{padding-left:56px}
.empty{padding:26px;text-align:center;color:var(--muted)}

/* line item editor */
table.lines{width:100%;border-collapse:collapse}
table.lines th{font-size:12px;text-transform:uppercase;color:#4b5563;text-align:left;padding:4px 6px;border-bottom:1px solid var(--line)}
table.lines td{padding:3px 4px;border-bottom:1px solid var(--line2);vertical-align:middle}
table.lines input,table.lines select{padding:5px 6px}
table.lines td.num input{text-align:right}
table.lines .rm{color:var(--danger);cursor:pointer;font-weight:700;padding:0 6px;background:none;border:0;font-size:16px}
table.lines .handle{color:#aaa;cursor:move}
.totals{margin-left:auto;width:320px;margin-top:10px}
.totals td{padding:4px 8px}
.totals td:last-child{text-align:right;font-variant-numeric:tabular-nums}
.totals tr.grand td{font-weight:700;font-size:16px;border-top:2px solid var(--line)}

/* badges / flash */
.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;background:#e5e7eb;color:#374151}
.badge.open{background:#dbeafe;color:#1e40af}.badge.partial{background:#fef3c7;color:#92400e}.badge.paid,.badge.posted,.badge.done,.badge.closed{background:#d1fae5;color:#065f46}
.badge.void{background:#fee2e2;color:#991b1b}.badge.draft{background:#e5e7eb;color:#374151}.badge.overdue{background:#fee2e2;color:#991b1b}
.badge.in_progress{background:#fef3c7;color:#92400e}
.flash{padding:10px 14px;border-radius:var(--radius);margin-bottom:12px;border:1px solid}
.flash.success{background:#ecfdf5;border-color:#a7f3d0;color:#065f46}
.flash.error{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.flash.info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}
.flash.warning{background:#fffbeb;border-color:#fde68a;color:#92400e}

/* document view */
.doc{background:#fff;border:1px solid var(--line);padding:32px 36px;max-width:900px}
.doc-head{display:flex;justify-content:space-between;gap:20px;margin-bottom:24px}
.doc-head .co{font-size:13px;white-space:pre-line}
.doc-head .co .name{font-size:20px;font-weight:700;margin-bottom:4px}
.doc-title{text-align:right}
.doc-title h2{font-size:26px;letter-spacing:1px;color:var(--brand);margin:0 0 6px}
.doc-meta{border-collapse:collapse;margin-left:auto}
.doc-meta td{padding:2px 8px;font-size:13px}
.doc-meta td:first-child{color:var(--muted);text-align:right}
.doc-parties{display:flex;gap:30px;margin-bottom:20px}
.doc-parties .party{flex:1;font-size:13px;white-space:pre-line}
.doc-parties .party .lbl{font-size:11px;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:3px}
.doc table.data th{background:#f1f4f8}
.doc-foot{margin-top:24px;font-size:12px;color:var(--muted);white-space:pre-line}
.doc .totals{width:300px}
.pay-cta{margin-top:20px;text-align:center}

/* auth pages */
.auth-body{background:var(--bg);display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px 30px;width:100%;max-width:400px;box-shadow:0 8px 30px rgba(20,30,50,.08)}
.auth-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;margin-bottom:18px}
.auth-brand small{color:var(--muted);font-weight:normal;font-size:12px}
.auth-card input{margin-top:3px}
.check-table{width:100%;border-collapse:collapse;margin-bottom:14px;font-size:13px}
.check-table td{padding:5px 4px;border-bottom:1px solid var(--line2)}
.ok{color:var(--accent);font-weight:600}.bad{color:var(--danger);font-weight:600}.warn{color:var(--warn);font-weight:600}
.error-trace{max-height:400px;overflow:auto}

/* tabs & misc */
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:14px}
.tabs a{padding:8px 14px;color:var(--muted);border-bottom:2px solid transparent;font-weight:500}
.tabs a.active{color:var(--brand2);border-color:var(--brand2)}
.tabs a:hover{text-decoration:none;color:var(--ink)}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px;font-size:13px}
.kv dt{color:var(--muted)}.kv dd{margin:0}
.pager{display:flex;gap:6px;align-items:center;margin-top:10px;font-size:13px}
.report-head{margin-bottom:12px}
.report-head .co{font-size:16px;font-weight:600}
.report-head .rn{font-size:20px;font-weight:700}
.report-head .period{color:var(--muted)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.sticky-actions{position:sticky;bottom:0;background:#fff;padding:10px 0;border-top:1px solid var(--line)}
.check-print{font-family:var(--font)}
.dropzone{border:2px dashed var(--line);padding:20px;text-align:center;color:var(--muted);border-radius:var(--radius)}
.autocomplete{position:relative}
.ac-list{position:absolute;z-index:30;background:#fff;border:1px solid var(--line);box-shadow:0 6px 18px rgba(20,30,50,.12);max-height:240px;overflow-y:auto;width:100%;min-width:260px;border-radius:var(--radius)}
.ac-list div{padding:6px 9px;cursor:pointer;font-size:13px}
.ac-list div:hover,.ac-list div.sel{background:#eaf1fb}
.ac-list .sub{color:var(--muted);font-size:11px}

@media (max-width:900px){
  .sidebar{position:fixed;left:-240px;z-index:50;transition:left .2s;height:100vh}
  .sidebar.open{left:0;box-shadow:0 0 0 100vw rgba(0,0,0,.35)}
  .menu-btn{display:block}
  .quick-search{display:none}
  .content{padding:14px}
  .grid-2,.grid-3,.grid-4,.two-col{grid-template-columns:1fr}
  .totals{width:100%}
  .doc{padding:18px}
  .doc-head,.doc-parties{flex-direction:column}
}