:root {
  --paper: #f7f6f2;
  --surface: #ffffff;
  --ink: #17181c;
  --ink-2: #4a4c55;
  --ink-3: #7c7e88;
  --line: #e2e0d9;
  --accent: #d9481f;
  --accent-ink: #ffffff;
  --ok: #1d7a46;
  --radius: 6px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 var(--font);
}
a { color: inherit; }
img { max-width: 100%; }

button, .btn {
  font: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  line-height: 1.2;
}
button:hover, .btn:hover { background: var(--paper); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #c13d17; }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: #2c2e35; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: rgba(0, 0, 0, .05); }
button:disabled { opacity: .5; cursor: default; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.lang-switch button { border: 0; border-radius: 0; padding: 6px 10px; font-size: 13px; background: transparent; }
.lang-switch button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ---------- Landing ---------- */

.site-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; gap: 12px; }
.brand { font-weight: 700; font-size: 20px; letter-spacing: -.02em; text-decoration: none; }
.brand span { color: var(--accent); }
.site-header nav { display: flex; align-items: center; gap: 8px; }

.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding: 56px 0 72px; }
.hero h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.05; letter-spacing: -.03em; margin: 0 0 20px; }
.hero p.lede { font-size: 19px; color: var(--ink-2); margin: 0 0 28px; max-width: 34em; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero .fine { color: var(--ink-3); font-size: 14px; margin-top: 14px; }

.hero-sample { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05); font-size: 13px; transform: rotate(1deg); }
.hero-sample .row { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.hero-sample .row:last-child { border: 0; }
.hero-sample .head { display: flex; justify-content: space-between; margin-bottom: 20px; }
.hero-sample .head strong { font-size: 22px; letter-spacing: -.02em; }
.hero-sample .total { font-weight: 700; font-size: 16px; padding-top: 12px; }

section { padding: 64px 0; border-top: 1px solid var(--line); }
section h2 { font-size: clamp(26px, 3.5vw, 34px); letter-spacing: -.02em; margin: 0 0 32px; line-height: 1.15; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.features h3 { margin: 0 0 6px; font-size: 17px; }
.features p { margin: 0; color: var(--ink-2); }

.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 820px; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; }
.plan.pro { border-color: var(--ink); }
.plan h3 { margin: 0; font-size: 18px; }
.plan .price { font-size: 40px; font-weight: 700; letter-spacing: -.03em; margin: 12px 0 2px; }
.plan .price small { font-size: 15px; font-weight: 400; color: var(--ink-3); letter-spacing: 0; }
.plan .alt-price { color: var(--ink-3); font-size: 14px; margin-bottom: 16px; }
.plan ul { padding: 0; margin: 0 0 24px; list-style: none; flex: 1; }
.plan li { padding: 6px 0 6px 22px; position: relative; color: var(--ink-2); }
.plan li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 10px; height: 6px; border-left: 2px solid var(--ok); border-bottom: 2px solid var(--ok); transform: rotate(-45deg); }
.plan .pay { display: grid; gap: 10px; }
.plan .note { font-size: 13px; color: var(--ink-3); margin-top: 12px; }

.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--ink-2); margin: 10px 0 0; }

.site-footer { padding: 32px 0 48px; color: var(--ink-3); font-size: 14px; border-top: 1px solid var(--line); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 12px; }
.site-footer a { color: var(--ink-2); }
.site-footer p { margin: 0; }

.top-legal { background: var(--ink); font-size: 12px; }
.top-legal .wrap { display: flex; justify-content: flex-end; padding-top: 5px; padding-bottom: 5px; }
.top-legal a { color: var(--paper); }

/* ---------- Legal pages ---------- */

.legal { max-width: 760px; padding: 24px 0 64px; }
.legal h1 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -.02em; margin: 0 0 6px; line-height: 1.15; }
.legal .updated { color: var(--ink-3); font-size: 14px; margin: 0 0 32px; }
.legal h2 { font-size: 20px; margin: 36px 0 10px; letter-spacing: -.01em; }
.legal p, .legal li { color: var(--ink-2); }
.legal ul { padding-left: 20px; }
.legal li { margin: 6px 0; }
.legal .callout { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 24px 0; }
.legal .callout p { margin: 0 0 12px; }
.legal .callout p:last-child { margin: 0; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding: 32px 0 48px; gap: 32px; }
  .hero-sample { transform: none; }
  .features { grid-template-columns: 1fr; gap: 24px; }
  .pricing { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .legal { padding-top: 8px; }
}

/* ---------- Success page ---------- */

.center-card { max-width: 520px; margin: 72px auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.center-card h1 { margin: 0 0 8px; font-size: 26px; letter-spacing: -.02em; }
.center-card p { color: var(--ink-2); }
.license-key { font: 600 20px var(--mono); letter-spacing: .04em; background: var(--paper); border: 1px dashed var(--ink-3); border-radius: var(--radius); padding: 14px; text-align: center; margin: 20px 0; word-break: break-all; }
.center-card .actions { display: flex; gap: 10px; flex-wrap: wrap; }
@media (max-width: 560px) { .center-card { margin: 24px 16px; padding: 24px; } }

/* ---------- Editor app ---------- */

.app-bar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 10px; padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line); }
.app-bar .spacer { flex: 1; }
.app-bar .badge { font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 4px; background: var(--ink); color: var(--paper); }

.app { display: grid; grid-template-columns: minmax(340px, 440px) 1fr; }
@media (min-width: 901px) {
  body.app-page { display: flex; flex-direction: column; height: 100dvh; }
  .app-page .app { flex: 1; min-height: 0; }
}
.editor { background: var(--surface); border-right: 1px solid var(--line); padding: 20px 16px 80px; overflow: auto; }
.preview-pane { padding: 32px 24px; overflow: auto; }

.editor fieldset { border: 0; padding: 0; margin: 0 0 24px; }
.editor legend { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin-bottom: 10px; padding: 0; display: flex; align-items: center; gap: 8px; width: 100%; }
.editor legend .pro-tag { font-size: 10px; padding: 1px 5px; border: 1px solid var(--ink-3); border-radius: 3px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field { display: grid; gap: 4px; margin-bottom: 10px; }
.field span { font-size: 13px; color: var(--ink-2); }
input, select, textarea {
  font: inherit; font-size: 15px; width: 100%;
  padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--ink); }
textarea { resize: vertical; min-height: 64px; }

.items { display: grid; gap: 8px; margin-bottom: 10px; }
.item-row { display: grid; grid-template-columns: 1fr 64px 96px 32px; gap: 6px; align-items: start; }
.item-row textarea { min-height: 40px; height: 40px; }
.item-row button { padding: 8px; border-color: var(--line); color: var(--ink-3); }
.item-head { display: grid; grid-template-columns: 1fr 64px 96px 32px; gap: 6px; font-size: 12px; color: var(--ink-3); }

.saved-row { display: flex; gap: 6px; margin-bottom: 10px; }
.saved-row select { flex: 1; }
.locked { position: relative; }
.locked > *:not(.lock-overlay) { opacity: .45; pointer-events: none; }
.lock-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.lock-overlay button { font-size: 13px; padding: 6px 12px; }

/* Invoice document (screen + print) */
.invoice {
  width: 210mm; min-height: 297mm; margin: 0 auto; background: #fff; color: #17181c;
  padding: 18mm 16mm; box-shadow: 0 1px 3px rgba(0,0,0,.08), 0 10px 30px rgba(0,0,0,.06);
  font-size: 10.5pt; line-height: 1.45; position: relative; display: flex; flex-direction: column;
  transform-origin: top left;
}
.invoice-fit { margin: 0 auto; }
.inv-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; margin-bottom: 14mm; }
.inv-title { font-size: 26pt; font-weight: 700; letter-spacing: -.02em; margin: 0; line-height: 1; }
.inv-meta { margin-top: 10px; display: grid; grid-template-columns: auto auto; gap: 2px 14px; font-size: 9.5pt; }
.inv-meta dt { color: #7c7e88; }
.inv-meta dd { margin: 0; font-weight: 600; }
.inv-logo { max-width: 46mm; max-height: 22mm; object-fit: contain; }
.inv-parties { display: grid; grid-template-columns: 1fr 1fr; gap: 12mm; margin-bottom: 10mm; }
.inv-label { font-size: 8pt; text-transform: uppercase; letter-spacing: .08em; color: #7c7e88; margin-bottom: 4px; font-weight: 700; }
.inv-party strong { display: block; font-size: 11.5pt; }
.inv-party div { white-space: pre-line; color: #4a4c55; }
.inv-table { width: 100%; border-collapse: collapse; margin-bottom: 6mm; }
.inv-table th { text-align: left; font-size: 8pt; text-transform: uppercase; letter-spacing: .08em; color: #7c7e88; border-bottom: 1.5px solid #17181c; padding: 6px 4px; }
.inv-table td { padding: 8px 4px; border-bottom: 1px solid #e2e0d9; vertical-align: top; white-space: pre-line; }
.inv-table .num { text-align: right; white-space: nowrap; }
.inv-totals { margin-left: auto; width: 75mm; display: grid; grid-template-columns: 1fr auto; row-gap: 4px; }
.inv-totals span:nth-child(odd) { padding-right: 12px; }
.inv-totals .grand { font-size: 13pt; font-weight: 700; border-top: 1.5px solid #17181c; padding-top: 6px; margin-top: 4px; }
.inv-totals span:nth-child(even) { text-align: right; }
.inv-bottom { margin-top: 12mm; display: grid; grid-template-columns: 1fr 1fr; gap: 12mm; }
.inv-bottom div div { white-space: pre-line; color: #4a4c55; }
.inv-watermark { margin-top: auto; padding-top: 10mm; text-align: center; font-size: 8pt; color: #9a9ca5; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .editor { border-right: 0; border-bottom: 1px solid var(--line); padding-bottom: 24px; }
  .preview-pane { padding: 16px; overflow-x: hidden; }
  .app-bar { flex-wrap: wrap; }
}

dialog { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; max-width: min(460px, calc(100vw - 32px)); width: 100%; color: var(--ink); }
dialog::backdrop { background: rgba(23, 24, 28, .45); }
dialog h2 { margin: 0 0 8px; font-size: 20px; }
dialog p { color: var(--ink-2); margin: 0 0 16px; }
dialog .pay { display: grid; gap: 10px; margin-bottom: 16px; }
dialog .row { display: flex; gap: 8px; }
dialog .msg { font-size: 14px; min-height: 1.4em; margin-top: 8px; }
.history-list { list-style: none; padding: 0; margin: 0 0 16px; max-height: 50vh; overflow: auto; }
.history-list li { display: flex; justify-content: space-between; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.history-list button { padding: 4px 10px; font-size: 13px; }

@media print {
  @page { size: A4; margin: 0; }
  body { background: #fff; }
  .app-bar, .editor, dialog { display: none !important; }
  body.app-page { display: block; height: auto; }
  .app { display: block; }
  .preview-pane { padding: 0; overflow: visible; }
  .invoice-fit { width: auto !important; height: auto !important; }
  .invoice { box-shadow: none; margin: 0; transform: none !important; }
}