:root{
  --brand:#0f766e; --brand-dark:#115e59; --brand-soft:#e6f4f2;
  --ink:#0f172a; --ink-2:#334155; --ink-3:#64748b; --line:#e2e8f0; --line-2:#cbd5e1;
  --bg:#f6f7f9; --card:#fff;
  --ok:#15803d; --ok-bg:#dcfce7; --warn:#b45309; --warn-bg:#fef3c7; --bad:#b91c1c; --bad-bg:#fee2e2;
  --info:#1d4ed8; --info-bg:#dbeafe; --mute-bg:#f1f5f9;
  --r:12px; --shadow:0 1px 2px rgba(15,23,42,.06),0 4px 16px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.45;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
h1{font-size:26px;margin:0 0 4px;letter-spacing:-.01em}
h2{font-size:18px;margin:0 0 12px}
h3{font-size:16px;margin:0 0 8px}
p{margin:0 0 8px}
.muted{color:var(--ink-3)}
.small{font-size:14px}
.container{max-width:1080px;margin:0 auto;padding:20px 16px 80px}

/* top bar */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:20px;padding:10px 20px;background:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink);text-decoration:none}
.logo-mark{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--brand);color:#fff;font-weight:800}
.nav{display:flex;gap:4px}
.nav a{padding:8px 14px;border-radius:999px;text-decoration:none;color:var(--ink-2);font-weight:500}
.nav a.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.nav a:hover{background:var(--mute-bg)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 18px;border-radius:10px;border:1px solid var(--line-2);background:#fff;color:var(--ink);font:inherit;font-weight:600;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--mute-bg)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark)}
.btn.success{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.danger{color:var(--bad);border-color:#fecaca}
.btn.danger:hover{background:var(--bad-bg)}
.btn.ghost{border-color:transparent;background:transparent}
.btn.sm{min-height:36px;padding:0 12px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{border:none;background:transparent;cursor:pointer;color:var(--ink-3);font-size:20px;width:40px;height:40px;border-radius:8px}
.icon-btn:hover{background:var(--bad-bg);color:var(--bad)}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.spacer{flex:1}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
.page-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px;margin-bottom:16px}
.page-head .spacer{min-width:10px}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.stat .label{font-size:13px;color:var(--ink-3);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.stat .value{font-size:24px;font-weight:700;margin-top:2px}
.stat.bad .value{color:var(--bad)}
.stat.ok .value{color:var(--ok)}

/* checklist */
.checklist{display:grid;gap:10px;margin:12px 0}
.check{display:flex;align-items:center;gap:14px;padding:14px;border:1px solid var(--line);border-radius:10px;background:#fff}
.check .num{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--mute-bg);font-weight:700;color:var(--ink-2)}
.check.done .num{background:var(--ok);color:#fff}
.check.done .title{text-decoration:line-through;color:var(--ink-3)}
.check .title{font-weight:600}
.check .body{flex:1}
.welcome{background:linear-gradient(135deg,#ecfdf5,#f0f9ff);border:1px solid #d1fae5}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}
.tabs{display:inline-flex;background:var(--mute-bg);border-radius:10px;padding:3px}
.tabs button{border:none;background:transparent;padding:8px 14px;border-radius:8px;font:inherit;font-weight:600;color:var(--ink-3);cursor:pointer}
.tabs button.active{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
input,select,textarea{font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line-2);border-radius:10px;padding:10px 12px;min-height:44px;width:100%}
textarea{min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid #99f6e4;border-color:var(--brand)}
.filters input{flex:1 1 220px;width:auto}
.filters select{width:auto}

/* table */
.table{width:100%;border-collapse:collapse;background:#fff}
.table th{text-align:left;font-size:13px;color:var(--ink-3);font-weight:600;padding:10px 12px;border-bottom:1px solid var(--line);text-transform:uppercase;letter-spacing:.03em}
.table td{padding:14px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.table tr.click{cursor:pointer}
.table tr.click:hover td{background:#f8fafc}
.table .num{text-align:right;white-space:nowrap}
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.docno{font-weight:600}
.sub{font-size:13px;color:var(--ink-3)}

.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap}
.pill.Draft{background:var(--mute-bg);color:var(--ink-2)}
.pill.Sent{background:var(--info-bg);color:var(--info)}
.pill.Paid,.pill.Accepted{background:var(--ok-bg);color:var(--ok)}
.pill.Overdue{background:var(--bad-bg);color:var(--bad)}
.pill.Expired{background:var(--warn-bg);color:var(--warn)}
.pill.Cancelled{background:var(--mute-bg);color:var(--ink-3);text-decoration:line-through}

.empty{text-align:center;padding:40px 20px;color:var(--ink-3)}
.empty .big{font-size:40px;margin-bottom:6px}

/* forms */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-weight:600;font-size:14px;color:var(--ink-2)}
.field .hint{font-size:13px;color:var(--ink-3)}
.full{grid-column:1/-1}
.switch{display:flex;align-items:center;gap:12px;cursor:pointer;user-select:none}
.switch input{appearance:none;-webkit-appearance:none;width:52px;height:30px;min-height:0;padding:0;border-radius:999px;background:var(--line-2);border:none;position:relative;cursor:pointer;flex:none;transition:background .15s}
.switch input::after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:left .15s}
.switch input:checked{background:var(--brand)}
.switch input:checked::after{left:25px}
.logo-preview{max-height:64px;max-width:200px;border:1px solid var(--line);border-radius:8px;padding:4px;background:#fff}

.notice{padding:12px 14px;border-radius:10px;margin-bottom:12px;font-size:14px}
.notice.warn{background:var(--warn-bg);color:#78350f}
.notice.info{background:var(--info-bg);color:#1e3a8a}
.notice.ok{background:var(--ok-bg);color:#14532d}

/* editor */
.items{width:100%;border-collapse:collapse}
.items th{font-size:13px;color:var(--ink-3);text-align:left;padding:6px 6px;font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.items td{padding:6px;vertical-align:top}
.items .c-qty{width:90px}.items .c-price{width:140px}.items .c-amt{width:130px;text-align:right}.items .c-del{width:44px}
.items td.c-amt{padding-top:16px;font-weight:600;white-space:nowrap}
.items input{text-align:left}
.items .c-qty input,.items .c-price input{text-align:right}
.totals{margin-left:auto;max-width:340px;margin-top:12px}
.totals .t{display:flex;justify-content:space-between;padding:6px 0;gap:16px}
.totals .t.grand{border-top:2px solid var(--ink);margin-top:6px;padding-top:10px;font-size:20px;font-weight:700}
.sticky-actions{position:sticky;bottom:0;background:rgba(246,247,249,.95);backdrop-filter:blur(6px);padding:12px 0;border-top:1px solid var(--line);margin-top:8px;z-index:5}

/* paper (document) */
.paper-wrap{display:flex;justify-content:center;overflow-x:auto;padding-bottom:20px}
.paper{width:210mm;min-height:297mm;background:#fff;color:#111827;box-shadow:0 2px 24px rgba(15,23,42,.12);padding:18mm 16mm;font-size:13px;line-height:1.45;position:relative}
.paper .p-head{display:flex;justify-content:space-between;gap:24px;margin-bottom:22px}
.paper .p-logo{max-height:60px;max-width:180px;margin-bottom:8px;display:block}
.paper .p-biz{font-size:17px;font-weight:700;margin-bottom:4px}
.paper .p-line{color:#4b5563;margin:0;white-space:pre-line}
.paper .p-title{font-size:26px;font-weight:800;letter-spacing:.06em;text-align:right;margin-bottom:8px;color:#0f172a}
.paper .p-meta{text-align:right}
.paper .p-meta div{margin:1px 0}
.paper .p-meta b{color:#111827}
.paper .p-meta span{color:#4b5563}
.paper .p-to{border-top:1px solid #e5e7eb;padding-top:14px;margin-bottom:18px}
.paper .p-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#6b7280;font-weight:700;margin-bottom:4px}
.paper table{width:100%;border-collapse:collapse;margin-bottom:12px}
.paper th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:#374151;border-bottom:1.5px solid #111827;padding:8px 6px}
.paper td{padding:9px 6px;border-bottom:1px solid #e5e7eb;vertical-align:top}
.paper .r{text-align:right;white-space:nowrap}
.paper .p-tot{margin-left:auto;width:300px}
.paper .p-tot .t{display:flex;justify-content:space-between;padding:5px 0;gap:12px}
.paper .p-tot .t.grand{border-top:1.5px solid #111827;margin-top:4px;padding-top:8px;font-weight:800;font-size:15px}
.paper .p-foot{border-top:1px solid #e5e7eb;margin-top:24px;padding-top:12px;color:#374151}
.paper .p-foot p{margin:0 0 6px;white-space:pre-line}
.paper .stamp{position:absolute;top:120mm;right:20mm;transform:rotate(-14deg);border:4px solid #15803d;color:#15803d;font-size:32px;font-weight:800;padding:4px 18px;border-radius:8px;opacity:.35;letter-spacing:.1em}
.paper .stamp.cancel{border-color:#b91c1c;color:#b91c1c}

.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
details.more{position:relative}
details.more summary{list-style:none}
details.more summary::-webkit-details-marker{display:none}
details.more .menu{position:absolute;right:0;top:48px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px;min-width:200px;z-index:10;display:flex;flex-direction:column}
details.more .menu button{border:none;background:none;text-align:left;padding:10px 12px;border-radius:8px;font:inherit;cursor:pointer}
details.more .menu button:hover{background:var(--mute-bg)}
details.more .menu button.danger{color:var(--bad)}

/* modal + toast */
.modal-back{position:fixed;inset:0;background:rgba(15,23,42,.45);display:grid;place-items:center;z-index:50;padding:16px}
.modal{background:#fff;border-radius:16px;max-width:560px;width:100%;max-height:92vh;overflow:auto;padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#0f172a;color:#fff;padding:12px 18px;border-radius:10px;font-weight:500;opacity:0;pointer-events:none;transition:all .2s;z-index:60;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.foot-note{margin-top:28px;text-align:center;font-size:13px;color:var(--ink-3)}

/* mobile */
@media (max-width:720px){
  .topbar{flex-wrap:wrap;gap:8px;padding:8px 12px}
  .nav{width:100%;justify-content:space-between}
  .nav a{flex:1;text-align:center;padding:8px 6px}
  h1{font-size:22px}
  .stats{grid-template-columns:1fr 1fr}
  .stats .stat:first-child{grid-column:1/-1}
  .grid2,.grid3{grid-template-columns:1fr}
  .table thead{display:none}
  .table tr{display:grid;grid-template-columns:1fr auto;padding:12px 14px;border-bottom:1px solid var(--line)}
  .table td{border:none;padding:2px 0}
  .table td.hide-m{display:none}
  .items thead{display:none}
  .items tr{display:grid;grid-template-columns:1fr 1fr 44px;gap:6px;padding:10px 0;border-bottom:1px solid var(--line)}
  .items td{padding:0}
  .items td.c-desc{grid-column:1/-1}
  .items td.c-amt{grid-column:1/3;padding-top:2px;text-align:left}
  .items td.c-amt::before{content:"Amount: ";color:var(--ink-3);font-weight:500}
  .items .c-qty,.items .c-price{width:auto}
  .card{padding:16px}
  .paper{transform-origin:top left}
  .page-head .btn{flex:1}
}

/* print: only the document */
@page{size:A4;margin:0}
@media print{
  body{background:#fff}
  .no-print,.topbar,.toolbar,.notice,#toast,#modal-root,.foot-note{display:none !important}
  .container{max-width:none;padding:0;margin:0}
  .paper-wrap{display:block;padding:0;overflow:visible}
  .paper{box-shadow:none;width:210mm;min-height:auto;margin:0;transform:none !important}
  .paper tr{page-break-inside:avoid}
}