/* ===== Tokens ===== */
:root{
  --bg:#f5f7f8; --surface:#fff; --text:#14201f; --muted:#52615f; --border:#d5dddc;
  --primary:#0f766e; --primary-ink:#fff; --danger:#b42318; --focus:#2563eb;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.06),0 6px 20px rgba(16,24,40,.06); --accent:#0f766e;
  --ok-bg:#dcfce7; --ok-ink:#14532d; --warn-bg:#fef3c7; --warn-ink:#78350f; --bad-bg:#fee2e2; --bad-ink:#991b1b; --info-bg:#e0e7ff; --info-ink:#312e81;
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0e1514; --surface:#17211f; --text:#e7eeed; --muted:#a3b3b0; --border:#2c3a38;
    --primary:#2dd4bf; --primary-ink:#04201d; --danger:#f97066; --focus:#93c5fd;
    --shadow:0 1px 3px rgba(0,0,0,.5);
    --ok-bg:#14532d; --ok-ink:#dcfce7; --warn-bg:#713f12; --warn-ink:#fef3c7; --bad-bg:#7f1d1d; --bad-ink:#fee2e2; --info-bg:#312e81; --info-ink:#e0e7ff; }
}
/* ===== Base ===== */
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text)}
h2{font-size:1.2rem;margin:0 0 .75rem} h3{font-size:1rem;margin:1.25rem 0 .5rem}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:var(--primary);color:var(--primary-ink);padding:.5rem 1rem;z-index:10}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.hint{color:var(--muted);font-size:.875rem;margin:.25rem 0 .75rem}
/* ===== Layout ===== */
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;backdrop-filter:saturate(1.4) blur(6px);
  padding:.6rem max(1rem,env(safe-area-inset-left));background:var(--surface);border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.1rem;margin:0}
.brand img{border-radius:8px}
.tabs{display:flex;gap:.25rem;margin-left:auto}
.tabs button{min-height:44px;padding:0 1rem;border:0;border-radius:999px;background:none;color:var(--muted);font:inherit;font-weight:600;cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--primary);color:var(--primary-ink)}
main{max-width:1100px;margin:0 auto;padding:1rem}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1rem;margin-bottom:1rem}
.layout-2{display:grid;grid-template-columns:minmax(260px,1fr) 2fr;gap:1rem;align-items:start}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 1rem}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:0 1rem}
.row{display:flex;gap:.5rem;align-items:center}
.row.wrap{flex-wrap:wrap} .row.end{justify-content:flex-end} .grow{flex:1}
/* ===== Forms ===== */
label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.75rem}
input,textarea{display:block;width:100%;margin-top:.25rem;padding:.6rem .7rem;min-height:44px;font:inherit;font-weight:400;
  color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px}
textarea{resize:vertical}
fieldset{border:1px solid var(--border);border-radius:var(--radius);padding:.75rem 1rem 0;margin:0 0 1rem}
legend{font-weight:700;padding:0 .25rem}
/* ===== Buttons ===== */
.btn{min-height:44px;padding:0 1rem;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:inherit;font-weight:600;cursor:pointer}
.btn{transition:border-color .15s,background .15s,transform .05s}
.btn:hover{border-color:var(--primary)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.tpl-item:hover{background:color-mix(in srgb,var(--primary) 8%,transparent)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.btn-danger{color:var(--danger);border-color:currentColor}
.btn-ghost{border-color:transparent;background:none}
.btn-sm{min-height:36px;padding:0 .75rem}
.icon-btn{min-width:44px;padding:0}
/* ===== Lists & chips ===== */
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin:.75rem 0}
.chips button{min-height:36px;padding:0 .8rem;border:1px solid var(--border);border-radius:999px;background:none;color:var(--text);font:inherit;font-size:.875rem;cursor:pointer}
.chips button[aria-pressed="true"]{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.list{list-style:none;margin:0;padding:0}
.list li{border-top:1px solid var(--border)}
.list li:first-child{border-top:0}
.tpl-item{display:block;width:100%;text-align:left;padding:.7rem .5rem;border:0;background:none;color:var(--text);font:inherit;cursor:pointer;border-radius:8px}
.tpl-item[aria-current="true"]{background:color-mix(in srgb,var(--primary) 15%,transparent)}
.tpl-item small{display:block;color:var(--muted)}
.hist-item{display:flex;align-items:center;gap:.5rem;padding:.6rem 0;flex-wrap:wrap}
.hist-item .meta{flex:1;min-width:180px} .hist-item small{display:block;color:var(--muted)}
/* ===== Line items ===== */
.items-head,.item{display:grid;grid-template-columns:3fr .8fr 1fr 1.5fr 1fr 44px;gap:.5rem;align-items:center}
.items-head{font-size:.8rem;font-weight:700;color:var(--muted);text-transform:uppercase}
.item{margin:.4rem 0} .item label{margin:0} .item .amount{text-align:right;font-variant-numeric:tabular-nums}
.item label>span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.totals{margin:1rem 0 1rem auto;max-width:280px}
.totals div{display:flex;justify-content:space-between;padding:.2rem 0;font-variant-numeric:tabular-nums}
.totals .grand{font-weight:800;font-size:1.15rem;border-top:2px solid var(--border);margin-top:.25rem;padding-top:.4rem}
/* ===== Combos, badges, misc ===== */
select{min-height:44px;padding:0 .5rem;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px}
.combo{display:flex;gap:.25rem;margin-top:.25rem}
.combo input{margin-top:0;min-width:0;flex:1}
.field{margin-bottom:.75rem} .field>label{margin-bottom:0}
.item .disc .lbl{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.item .disc .combo{margin-top:0}
.span-all{grid-column:1/-1}
.form-head h2{margin:0}
.badge{display:inline-block;padding:.1rem .6rem;border-radius:999px;font-size:.75rem;font-weight:700;background:color-mix(in srgb,var(--primary) 15%,transparent);color:var(--text);vertical-align:middle}
.badge-paid{background:#dcfce7;color:#14532d} .badge-unpaid{background:#fef3c7;color:#78350f}
.hist-item .badge{margin-left:.35rem}
.hist-tools{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:.5rem} .hist-tools label{margin:0}
.link-btn{background:none;border:0;padding:0;color:var(--primary);font:inherit;font-weight:600;text-decoration:underline;cursor:pointer}
.empty{text-align:center;color:var(--muted);padding:1.5rem .5rem}
.empty-icon{font-size:2.5rem;margin:0}
.welcome{border-left:4px solid var(--primary);background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 10%,var(--surface)),var(--surface))}
/* ===== Invoice preview ===== */
.invoice{background:#fff;color:#111;border:1px solid #ddd;border-radius:8px;padding:2rem;margin-top:1rem}
.invoice header{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;border-bottom:3px solid #0f766e;padding-bottom:1rem}
.invoice h1{margin:0;color:#0f766e;font-size:1.6rem}
.invoice .parties{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1rem 0}
.invoice .pre{white-space:pre-line}
.invoice table{width:100%;border-collapse:collapse;margin:1rem 0}
.invoice th,.invoice td{padding:.5rem;border-bottom:1px solid #e5e5e5;text-align:left}
.invoice .num{text-align:right;font-variant-numeric:tabular-nums}
.invoice .from{text-align:right}
.invoice .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.invoice .badge{margin-top:.4rem}
.invoice .sums{width:auto;min-width:260px;margin-left:auto}
.invoice .sums td{border:0;padding:.3rem .5rem}
.invoice .sums .grand td{font-weight:800;font-size:1.1rem;border-top:2px solid #111}
.invoice .notes{margin-top:1rem;padding-top:.75rem;border-top:1px solid #e5e5e5}
/* ===== Banner, toast, dialogs ===== */
.banner{display:flex;gap:.75rem;align-items:center;justify-content:center;flex-wrap:wrap;padding:.5rem 1rem;background:var(--primary);color:var(--primary-ink)}
.banner .btn{background:var(--surface);color:var(--text)} .banner .btn-ghost{background:none;color:inherit}
.toast{position:fixed;left:50%;bottom:calc(1.5rem + env(safe-area-inset-bottom));transform:translate(-50%,200%);background:var(--text);color:var(--bg);
  padding:.75rem 1.25rem;border-radius:999px;font-weight:600;transition:transform .25s,opacity .25s,visibility .25s;z-index:20;pointer-events:none;opacity:0;visibility:hidden}
.toast.show{transform:translate(-50%,0);opacity:1;visibility:visible}
dialog{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);width:min(560px,94vw);padding:1.25rem}
dialog::backdrop{background:rgba(0,0,0,.5)}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}
/* ===== Responsive ===== */
@media (max-width:760px){
  .layout-2,.grid-2,.grid-3,.invoice .parties{grid-template-columns:1fr}
  .tabs{margin-left:0;width:100%} .tabs button{flex:1}
  .items-head{display:none}
  .item{grid-template-columns:1fr 1fr;gap:.5rem;padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg)}
  .item .desc{grid-column:1/-1}
  .item label>span{position:static;width:auto;height:auto;clip:auto;font-size:.8rem}
  .item .amount{text-align:left;font-weight:700;align-self:center}
  .item .amount::before{content:"Amount: ";font-weight:600;color:var(--muted)}
  .item .disc{grid-column:1/-1}
  .item .disc .lbl{position:static;width:auto;height:auto;clip:auto;font-size:.8rem;font-weight:600}
  .item .remove{width:100%}
  .item .remove::after{content:" Remove"}
  .invoice{padding:1rem}
  #item-add{width:100%}
  .hist-item .meta{flex-basis:100%}
  .hist-item .btn{flex:1;min-height:44px}
  .hist-tools label.grow{flex-basis:100%}
  .hist-tools label:not(.grow){flex:1} .hist-tools select{width:100%}
  .invoice .from{text-align:left} .invoice .sums{width:100%}
}
/* ===== Print ===== */
@media print{
  body{background:#fff} .no-print,.toast,.skip,#view-replies,#view-history{display:none!important}
  main{padding:0;max-width:none} .panel{border:0;box-shadow:none;padding:0;background:#fff}
  #view-invoice,#preview-wrap{display:block!important}
  .invoice{border:0;margin:0;padding:0}
  .badge-paid,.badge-unpaid{print-color-adjust:exact;-webkit-print-color-adjust:exact}
}

/* ===== v1.3: branding, quotes, stats, sample data ===== */
.settings-btn{display:inline-flex;align-items:center;gap:.35rem}
.settings-btn [aria-hidden]{font-size:1.15rem}
.sample-banner{display:flex;gap:.75rem;align-items:center;justify-content:center;flex-wrap:wrap;padding:.55rem 1rem;background:var(--info-bg);color:var(--info-ink);border-bottom:1px solid var(--border);text-align:center}
.row.center{justify-content:center}
.segmented{display:inline-flex;border:1px solid var(--border);border-radius:999px;padding:3px;margin:0 0 1rem;gap:2px;background:var(--bg)}
.segmented label{margin:0;position:relative}
.segmented input{position:absolute;opacity:0;inset:0;margin:0;min-height:0;cursor:pointer}
.segmented span{display:inline-flex;align-items:center;min-height:40px;padding:0 1rem;border-radius:999px;font-weight:600;color:var(--muted)}
.segmented input:checked+span{background:var(--primary);color:var(--primary-ink)}
.segmented input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}
.segmented input:disabled+span{cursor:not-allowed}
.segmented input:disabled:not(:checked)+span{opacity:.45}
.btn-accent{background:color-mix(in srgb,var(--primary) 14%,var(--surface));border-color:var(--primary);color:var(--text)}
.badge-overdue{background:var(--bad-bg);color:var(--bad-ink)}
.badge-quote{background:var(--info-bg);color:var(--info-ink)}
.badge-converted{background:var(--border);color:var(--text)}
.badge-sample{background:transparent;border:1px dashed var(--muted);color:var(--muted)}
.badge-paid{background:var(--ok-bg);color:var(--ok-ink)} .badge-unpaid{background:var(--warn-bg);color:var(--warn-ink)}
.hist-item.is-overdue{box-shadow:inset 3px 0 0 var(--danger);padding-left:.6rem}
/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1.25rem}
.stat{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:.75rem 1rem;display:flex;flex-direction:column;gap:.15rem}
.stat-label{font-size:.8rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.stat strong{font-size:1.35rem;font-variant-numeric:tabular-nums}
.stat small{color:var(--muted);font-size:.8rem}
.stats.has-overdue .stat-overdue{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 8%,var(--surface))}
/* settings dialog */
dialog.wide{width:min(720px,96vw);max-height:92vh;overflow:auto}
.brand-box .brand-row{display:flex;gap:1rem;align-items:flex-start;flex-wrap:wrap;margin-bottom:.75rem}
.logo-slot{width:120px;height:80px;border:1px dashed var(--border);border-radius:10px;display:grid;place-items:center;background:var(--bg);overflow:hidden}
.logo-slot img{max-width:100%;max-height:100%;object-fit:contain}
.logo-slot .hint{margin:0}
.file-btn{display:inline-flex;align-items:center;margin:0}
.file-btn:focus-within{outline:3px solid var(--focus);outline-offset:2px}
.field-label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.35rem}
.swatches{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:.5rem}
.swatch{width:36px;height:36px;border-radius:50%;border:3px solid var(--surface);box-shadow:0 0 0 1px var(--border);cursor:pointer;padding:0}
.swatch[aria-checked="true"]{box-shadow:0 0 0 3px var(--text)}
.swatch-0f766e{background:#0f766e}.swatch-1d4ed8{background:#1d4ed8}.swatch-7c3aed{background:#7c3aed}.swatch-be123c{background:#be123c}
.swatch-c2410c{background:#c2410c}.swatch-15803d{background:#15803d}.swatch-334155{background:#334155}
label.inline{display:inline-flex;align-items:center;gap:.5rem}
label.inline input[type=color]{width:56px;padding:2px;margin:0}
/* invoice branding */
.invoice header{border-bottom-color:var(--accent)}
.invoice h1{color:var(--accent);letter-spacing:.06em}
.invoice .doc-num{font-weight:700;font-size:1.05rem}
.invoice .inv-logo{display:block;max-height:64px;max-width:180px;margin:0 0 .5rem auto;object-fit:contain}
.invoice .eyebrow{display:block;font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#555;margin-bottom:.2rem}
.invoice thead th{background:color-mix(in srgb,var(--accent) 10%,#fff);font-size:.85rem}
.invoice .sums .grand td{border-top-color:var(--accent)}
.invoice .pay{margin-top:1rem;padding:.75rem 1rem;border:1px solid #e5e5e5;border-left:4px solid var(--accent);border-radius:6px;background:#fafafa}
.invoice .pay-link{display:inline-block;margin-top:.4rem;padding:.35rem .9rem;border-radius:6px;background:var(--accent);color:#fff;font-weight:700;text-decoration:none}
.invoice .pay-url{font-size:.8rem;color:#555;overflow-wrap:anywhere}
.invoice .badge-paid{background:#dcfce7;color:#14532d}.invoice .badge-unpaid{background:#fef3c7;color:#78350f}
.invoice .badge-overdue{background:#fee2e2;color:#991b1b}.invoice .badge-quote{background:#e0e7ff;color:#312e81}.invoice .badge-converted{background:#e5e7eb;color:#111}
@media (max-width:760px){
  .stats{grid-template-columns:1fr 1fr} .stat-overdue{grid-column:1/-1}
  .settings-label{display:none}
  .topbar .settings-btn{position:absolute;right:.75rem;top:.6rem}
  .invoice .inv-logo{margin-left:0}
  .invoice table{font-size:.85rem} .invoice th,.invoice td{padding:.4rem .3rem}
  .invoice .num{white-space:nowrap}
  .segmented{display:flex} .segmented label{flex:1} .segmented span{justify-content:center;width:100%}
}
@media print{
  .invoice .pay-link{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  .invoice thead th{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  .sample-banner{display:none!important}
  .invoice .table-scroll{overflow:visible}
}

/* ===== v1.4: footer, backup / restore ===== */
.app-footer{display:flex;gap:1rem;justify-content:center;align-items:center;flex-wrap:wrap;padding:1rem;font-size:.85rem;color:var(--muted)}
.app-footer a{color:var(--text);text-underline-offset:3px;min-height:44px;display:inline-flex;align-items:center}
.app-footer .diag-link{margin:0}
.app-footer .diag-link button{opacity:1;color:var(--text);font-size:inherit}
#settings-legal{color:var(--text)}
.restore-counts{list-style:none;padding:0;margin:.5rem 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.5rem}
.restore-counts li{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:.5rem .75rem}
.restore-counts strong{display:block;font-size:1.2rem}
.restore-notes{font-size:.875rem;color:var(--warn-ink);background:var(--warn-bg);border-radius:8px;padding:.5rem 1rem .5rem 1.75rem}
.restore-warning{padding:.75rem 1rem;border-radius:8px;background:var(--bad-bg);color:var(--bad-ink)}