:root {
  --bg: #f3f5f9;
  --surface: #ffffff;
  --text: #182033;
  --muted: #5d6880;
  --border: #d9dee8;
  --accent: #2f5bea;
  --accent-text: #ffffff;
  --accent-soft: #e7edff;
  --danger: #c53030;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1424;
    --surface: #161e33;
    --text: #e6eaf4;
    --muted: #9aa5bf;
    --border: #2a3552;
    --accent: #6b8cff;
    --accent-text: #0e1424;
    --accent-soft: #1e2a4d;
    --danger: #ff7b7b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}

button, input, select, textarea { font: inherit; color: inherit; }

button, .button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover, .button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.ghost, .button.ghost { background: transparent; }
button.danger { color: var(--danger); }
button.icon { padding: 4px 9px; font-size: 18px; line-height: 1; background: transparent; border-color: transparent; color: var(--muted); }
button.icon:hover { color: var(--danger); border-color: var(--border); }
button[hidden] { display: none; }

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand strong { display: block; font-size: 17px; }
.tagline { color: var(--muted); font-size: 13px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.actions select { width: auto; border: 1px solid var(--border); border-radius: 8px; padding: 7px 8px; background: var(--surface); }

.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented button { border: 0; border-radius: 0; background: transparent; }
.segmented button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* ---------- layout ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 820px);
  gap: 24px;
  padding: 24px;
  max-width: 1900px;
  margin: 0 auto;
  align-items: start;
}

.editor { display: grid; gap: 16px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 18px;
}
.card.muted p { color: var(--muted); margin: 0 0 12px; }
.card h2 { font-size: 15px; margin: 0 0 12px; }
.card h2 small { font-weight: 400; color: var(--muted); margin-left: 6px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.grid .wide { grid-column: 1 / -1; }

label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 9px;
  background: var(--bg);
  font-size: 14px;
}
input[type="checkbox"] { width: auto; }
input[type="file"] { width: auto; border: 0; padding: 0; background: transparent; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input:disabled { opacity: 0.5; }
textarea { resize: vertical; }

.logo-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); }
.row { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- line items ---------- */

.items-head, .item {
  display: grid;
  grid-template-columns: minmax(160px, 3fr) 70px 80px 110px 70px 120px 34px;
  gap: 8px;
  align-items: center;
}
.items-head { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.item { margin-bottom: 8px; }
.item output { font-variant-numeric: tabular-nums; font-size: 14px; }
.right { text-align: right; }

@media (max-width: 760px) {
  .items-head { display: none; }
  .item {
    grid-template-columns: 1fr 1fr 1fr;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
  }
  .item [data-field="description"] { grid-column: 1 / -1; }
}

/* ---------- paper preview ---------- */

.preview-wrap { position: sticky; top: 84px; }

.paper {
  --ink: #1b2233;
  --ink-muted: #5f6878;
  --line: #e2e5eb;
  background: #fff;
  color: var(--ink);
  aspect-ratio: 210 / 297;
  padding: 56px 60px;
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(20, 30, 60, 0.12), 0 1px 3px rgba(20, 30, 60, 0.1);
  font-size: 13px;
  line-height: 1.5;
  overflow: hidden;
}
.paper h1 { font-size: 30px; margin: 0; letter-spacing: -0.01em; }
.paper h3 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-muted); margin: 0 0 4px; }
.paper p { margin: 0 0 10px; }
.paper .logo { max-height: 56px; max-width: 220px; display: block; margin-bottom: 14px; }
.paper .ph { color: #b3b9c4; }
.paper .small { font-size: 11px; color: var(--ink-muted); }

.paper-head { display: flex; justify-content: space-between; gap: 24px; align-items: flex-end; margin-bottom: 32px; }
.meta { display: grid; grid-template-columns: auto auto; gap: 2px 14px; margin: 0; text-align: right; }
.meta dt, .pay dt { color: var(--ink-muted); }
.meta dd, .pay dd { margin: 0; }

.parties { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 28px; }

.paper table { width: 100%; border-collapse: collapse; }
.lines th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-muted); border-bottom: 2px solid var(--ink); padding: 6px 6px; }
.lines td { border-bottom: 1px solid var(--line); padding: 8px 6px; vertical-align: top; }
.paper .num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.lines th:first-child, .lines td:first-child { padding-left: 0; }
.lines th:last-child, .lines td:last-child { padding-right: 0; }

.totals { width: auto !important; margin: 14px 0 22px auto; min-width: 280px; }
.totals th { text-align: left; font-weight: 400; color: var(--ink-muted); padding: 3px 24px 3px 0; }
.totals td { text-align: right; padding: 3px 0; font-variant-numeric: tabular-nums; }
.totals .grand th, .totals .grand td { font-size: 16px; font-weight: 700; color: var(--ink); border-top: 2px solid var(--ink); padding-top: 8px; }

.notes { white-space: normal; }
.pay { margin-top: 18px; padding: 14px 16px; background: #f5f7fb; border-radius: 6px; }
.pay dl { display: grid; grid-template-columns: max-content 1fr; gap: 2px 18px; margin: 0 0 8px; }
.pay p { margin: 0; }

/* ---------- footer + dialog ---------- */

.site-footer { padding: 8px 24px 28px; color: var(--muted); font-size: 13px; text-align: center; }
.site-footer a { color: var(--accent); }

dialog {
  width: min(900px, calc(100vw - 32px));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 18px 20px;
}
dialog::backdrop { background: rgba(10, 15, 30, 0.45); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.dialog-head h2 { margin: 0; font-size: 17px; }
#saved-list { overflow-x: auto; }
.saved { width: 100%; border-collapse: collapse; }
.saved td { padding: 9px 8px; border-top: 1px solid var(--border); vertical-align: middle; }
.saved tr.active td { background: var(--accent-soft); }
.saved small { color: var(--muted); }
.saved .num { text-align: right; white-space: nowrap; }
.row-actions div { display: flex; gap: 6px; justify-content: flex-end; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); }
.badge.quote { background: #fff1d6; color: #8a5a00; }

/* ---------- responsive ---------- */

@media (max-width: 1200px) {
  .layout { grid-template-columns: 1fr; }
  .preview-wrap { position: static; }
  .paper { aspect-ratio: auto; min-height: 0; }
}

@media (max-width: 600px) {
  .topbar { padding: 10px 16px; }
  .layout { padding: 16px; }
  .paper { padding: 28px 22px; }
  .parties { grid-template-columns: 1fr; }
  .paper-head { flex-direction: column; align-items: flex-start; }
  .meta { text-align: left; }
}

/* ---------- print: only the document ---------- */

@page { size: A4; margin: 16mm 16mm 18mm; }

@media print {
  body { background: #fff; }
  .no-print, dialog { display: none !important; }
  .layout { display: block; padding: 0; max-width: none; }
  .preview-wrap { position: static; }
  .paper { box-shadow: none; padding: 0; aspect-ratio: auto; overflow: visible; border-radius: 0; font-size: 11pt; }
  .paper .parties { grid-template-columns: 1fr 1fr; }
  .paper-head { flex-direction: row; align-items: flex-end; }
  .meta { text-align: right; }
  .lines tr { break-inside: avoid; }
  .pay { -webkit-print-color-adjust: exact; print-color-adjust: exact; break-inside: avoid; }
}