:root {
  color-scheme: light;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary: #0ea5e9;
  --accent: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --soft: #eef2ff;
  --shadow: 0 18px 45px rgba(15, 23, 42, .08);
  --radius: 8px;
  --header-h: 72px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1120;
  --card: #111827;
  --text: #f9fafb;
  --muted: #a1a1aa;
  --border: #263244;
  --soft: #172554;
  --shadow: 0 18px 45px rgba(0, 0, 0, .32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(37, 99, 235, .38); outline-offset: 3px; }

.container { width: min(1180px, calc(100% - 32px)); margin-inline: auto; }
.section { padding: 72px 0; }
.section-sm { padding: 42px 0; }
.eyebrow {
  color: var(--primary);
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  font-size: .78rem;
}
h1, h2, h3 { line-height: 1.08; margin: 0 0 16px; letter-spacing: 0; }
h1 { font-size: clamp(2.35rem, 6vw, 5rem); max-width: 780px; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); max-width: 780px; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 16px; color: var(--muted); }
.lead { font-size: clamp(1.05rem, 2vw, 1.25rem); max-width: 720px; }
.muted { color: var(--muted); }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 1000;
  background: var(--primary);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius);
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(248, 250, 252, .82);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
[data-theme="dark"] .site-header { background: rgba(11, 17, 32, .82); }
.site-header.is-scrolled { border-color: var(--border); box-shadow: 0 8px 30px rgba(15, 23, 42, .06); }
.nav-wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; font-size: 1.25rem; }
.brand-mark {
  width: 36px; height: 36px; display: grid; place-items: center; border-radius: 8px;
  background: var(--primary); color: #fff; box-shadow: 0 10px 24px rgba(37, 99, 235, .24);
}
.main-nav { display: none; align-items: center; gap: 4px; }
.main-nav a { padding: 10px 12px; border-radius: 8px; color: var(--muted); font-weight: 700; font-size: .94rem; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--text); background: rgba(37, 99, 235, .08); }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn, .menu-btn {
  width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--card); color: var(--text); display: inline-grid; place-items: center;
}
.menu-btn span, .menu-btn::before, .menu-btn::after {
  content: ""; width: 18px; height: 2px; background: currentColor; display: block; border-radius: 2px;
}
.menu-btn { gap: 4px; }
.mobile-panel {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 18px;
}
.mobile-panel.is-open { display: block; }
.mobile-panel a { display: block; padding: 12px; border-radius: 8px; font-weight: 750; color: var(--muted); }

.btn {
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--card);
  color: var(--text);
  font-weight: 800;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(15, 23, 42, .08); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-soft { background: rgba(37, 99, 235, .08); color: var(--primary); border-color: rgba(37, 99, 235, .14); }
.btn-danger { color: var(--danger); }
.btn-block { width: 100%; }

.hero { padding: 70px 0 54px; overflow: hidden; }
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--card); color: var(--muted); font-weight: 750; font-size: .86rem;
}
.hero-visual { position: relative; min-height: 430px; }
.floating-card, .invoice-preview, .document-preview {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.invoice-preview {
  width: min(100%, 520px);
  margin-inline: auto;
  padding: 26px;
  aspect-ratio: 1 / 1.28;
}
.preview-head { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 28px; }
.preview-logo { width: 48px; height: 48px; border-radius: 8px; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 900; }
.preview-line { height: 10px; border-radius: 20px; background: var(--border); margin: 10px 0; }
.preview-line.short { width: 58%; }
.preview-table { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-top: 26px; }
.preview-row { display: grid; grid-template-columns: 1.5fr .6fr .8fr; gap: 10px; padding: 12px; border-bottom: 1px solid var(--border); }
.preview-row:last-child { border-bottom: 0; }
.floating-card { position: absolute; right: 0; bottom: 18px; padding: 14px 16px; width: 190px; }

.grid { display: grid; gap: 18px; }
.grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .04);
}
.card.interactive:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(37, 99, 235, .28); }
.card.interactive { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.icon-box {
  width: 44px; height: 44px; border-radius: 8px; display: grid; place-items: center;
  background: rgba(37, 99, 235, .09); color: var(--primary); margin-bottom: 16px;
}
.stat { text-align: center; }
.stat strong { display: block; font-size: 2.5rem; line-height: 1; }

.app-shell { display: grid; gap: 22px; align-items: start; padding: 28px 0 60px; }
.builder-panel { display: grid; gap: 18px; min-width: 0; }
.form-section { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; min-width: 0; overflow: hidden; }
.form-section h2 { font-size: clamp(1.35rem, 2.4vw, 2.35rem); max-width: 100%; overflow-wrap: anywhere; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.field { display: grid; gap: 6px; min-width: 0; }
.field label { font-size: .84rem; font-weight: 800; color: var(--text); }
.field input, .field select, .field textarea, .search-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  padding: 11px 12px;
  min-height: 42px;
}
.field textarea { min-height: 88px; resize: vertical; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
.items-table { width: 100%; min-width: 760px; border-collapse: collapse; background: var(--card); }
.items-table th, .items-table td { padding: 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.items-table th { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0; }
.items-table input { width: 100%; border: 1px solid var(--border); border-radius: 7px; padding: 8px; background: var(--card); color: var(--text); }
.document-sticky { position: static; min-width: 0; display: grid; gap: 12px; }
.preview-shell {
  background: color-mix(in srgb, var(--card) 92%, var(--primary) 8%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}
.preview-toolbar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
.preview-toolbar-title { display: grid; gap: 2px; }
.preview-toolbar-title strong { font-size: .96rem; }
.document-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-start; }
.document-actions .btn { min-height: 38px; padding: 8px 12px; }
.document-preview { padding: clamp(18px, 4vw, 38px); color: #111827; background: #fff; min-height: 680px; overflow: hidden; }
.document-preview.invoice-doc { border-top: 7px solid var(--primary); }
.document-preview.quote-doc { border-top: 7px solid var(--secondary); }
.document-preview.receipt-doc { border-top: 7px solid var(--accent); }
.doc-top, .doc-meta, .totals-row, .doc-footer { display: flex; justify-content: space-between; gap: 18px; }
.doc-title { font-size: 2rem; font-weight: 900; color: #111827; }
.doc-muted { color: #64748b; }
.doc-table { width: 100%; border-collapse: collapse; margin: 28px 0; }
.doc-table th { background: #f1f5f9; color: #334155; text-align: left; }
.doc-table th, .doc-table td { padding: 11px; border-bottom: 1px solid #e2e8f0; }
.totals { margin-left: auto; width: min(100%, 330px); }
.totals-row { padding: 8px 0; border-bottom: 1px solid #e2e8f0; }
.totals-row.grand { font-size: 1.25rem; font-weight: 900; color: #111827; }
.document-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(15, 23, 42, .72);
  display: none;
  padding: 24px;
  overflow: auto;
}
.document-modal.is-open { display: block; }
.document-modal-inner {
  width: min(940px, 100%);
  margin: 0 auto;
}
.document-modal-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  color: #fff;
}
.document-modal .document-preview { min-height: 1080px; }

.document-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.document-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--primary) 60%, transparent), transparent);
}
.quote-page .document-hero .eyebrow, .quote-page .btn-soft { color: var(--secondary); }
.receipt-page .document-hero .eyebrow, .receipt-page .btn-soft { color: var(--accent); }
.quote-page .btn-primary { background: var(--secondary); border-color: var(--secondary); }
.receipt-page .btn-primary { background: var(--accent); border-color: var(--accent); }

.template-card-preview {
  min-height: 330px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  align-content: start;
  gap: 16px;
  color: #111827;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.8);
}
.template-card-preview .template-top { display: flex; justify-content: space-between; gap: 14px; align-items: start; }
.template-mark { width: 42px; height: 42px; border-radius: 8px; display: grid; place-items: center; color: #fff; font-weight: 900; }
.template-lines span { display: block; height: 8px; border-radius: 99px; background: #e5e7eb; margin: 8px 0; }
.template-table { display: grid; gap: 8px; }
.template-table span { height: 10px; border-radius: 99px; background: #edf2f7; }
.template-modern .template-mark, .template-modern .template-accent { background: #2563eb; }
.template-minimal .template-mark, .template-minimal .template-accent { background: #111827; }
.template-corporate .template-mark, .template-corporate .template-accent { background: #0f766e; }
.template-agency .template-mark, .template-agency .template-accent { background: #7c3aed; }
.template-construction .template-mark, .template-construction .template-accent { background: #f59e0b; }
.template-healthcare .template-mark, .template-healthcare .template-accent { background: #0ea5e9; }
.template-creative .template-mark, .template-creative .template-accent { background: #ef4444; }
.template-accent { height: 5px; border-radius: 99px; }

.calc-dashboard { align-items: stretch; }
.calc-card { display: grid; gap: 12px; }
.calc-result {
  background: rgba(37, 99, 235, .08);
  border: 1px solid rgba(37, 99, 235, .14);
  border-radius: 8px;
  padding: 14px;
}
.calc-result strong { display: block; font-size: 1.55rem; line-height: 1.1; }
.calc-note { font-size: .9rem; color: var(--muted); margin: 0; }
.calc-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.ad-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 22px auto;
  max-width: 100%;
  overflow: visible;
  min-height: 92px;
}
.ad-frame {
  border: 0;
  display: block;
  max-width: 100%;
  background: transparent;
}
.ad-shell {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  padding: 8px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .04);
  display: grid;
  place-items: center;
  max-width: 100%;
  min-width: min(100%, 300px);
}
.ad-shell [data-ad-host] {
  width: 100%;
  display: grid;
  place-items: center;
}
.ad-shell iframe {
  max-width: 100%;
  border: 0;
}
.ad-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: .72rem;
  text-align: center;
}
.ad-fallback {
  min-height: 60px;
  width: 100%;
  display: grid;
  place-items: center;
  text-align: center;
  border-radius: 7px;
  padding: 12px;
  background: rgba(37, 99, 235, .08);
  color: var(--primary);
  font-weight: 850;
}
.affiliate-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(15, 23, 42, .58);
  z-index: 350;
}
.affiliate-modal.is-open { display: flex; }
.affiliate-card {
  width: min(560px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 24px;
}
.affiliate-head { display: flex; justify-content: space-between; gap: 16px; align-items: start; }
.affiliate-list { display: grid; gap: 8px; margin: 16px 0; padding: 0; list-style: none; color: var(--muted); }
.affiliate-list li::before { content: "✓"; color: var(--accent); font-weight: 900; margin-right: 8px; }

.tabs, .filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.tab, .filter-btn {
  border: 1px solid var(--border); background: var(--card); color: var(--muted);
  border-radius: 999px; padding: 9px 13px; font-weight: 800;
}
.tab[aria-selected="true"], .filter-btn.is-active { color: #fff; border-color: var(--primary); background: var(--primary); }
.accordion { display: grid; gap: 10px; }
.accordion-item { border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.accordion-trigger { width: 100%; border: 0; background: transparent; color: var(--text); padding: 16px; display: flex; justify-content: space-between; text-align: left; font-weight: 850; }
.accordion-panel { display: none; padding: 0 16px 16px; }
.accordion-item.is-open .accordion-panel { display: block; }

.site-footer { background: var(--card); border-top: 1px solid var(--border); padding: 56px 0 22px; }
.footer-grid { display: grid; gap: 24px; grid-template-columns: 1fr; }
.footer-col a { display: block; color: var(--muted); margin: 9px 0; }
.newsletter-form { display: flex; gap: 8px; flex-wrap: wrap; }
.newsletter-form input { flex: 1 1 220px; border: 1px solid var(--border); border-radius: 8px; padding: 11px 12px; background: var(--bg); color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--border); margin-top: 32px; padding-top: 20px; color: var(--muted); }
.back-to-top { position: fixed; right: 18px; bottom: 18px; opacity: 0; pointer-events: none; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; }

.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%) translateY(18px);
  background: #111827; color: #fff; padding: 12px 16px; border-radius: 8px;
  opacity: 0; pointer-events: none; transition: .2s ease; z-index: 200;
}
.toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .45s ease, transform .45s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (min-width: 768px) {
  .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(2, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-grid { grid-template-columns: 1.02fr .98fr; }
  .footer-grid { grid-template-columns: 1.4fr repeat(4, 1fr); }
  .preview-toolbar { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
  .document-actions { justify-content: flex-end; }
}

@media (min-width: 1024px) {
  .main-nav { display: flex; }
  .menu-btn { display: none; }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .app-shell { grid-template-columns: minmax(0, 640px) minmax(360px, 500px); justify-content: center; }
  .document-sticky { position: sticky; top: calc(var(--header-h) + 18px); }
}

@media (min-width: 1280px) {
  .app-shell { grid-template-columns: minmax(0, 690px) minmax(420px, 520px); }
}

@media (max-width: 560px) {
  .container { width: min(100% - 24px, 1180px); }
  .section { padding: 52px 0; }
  .hero { padding-top: 42px; }
  .nav-actions .btn-primary { display: none; }
  .doc-top, .doc-meta, .doc-footer { display: grid; }
  .document-modal { padding: 12px; }
  .invoice-preview { padding: 18px; min-height: 420px; }
  .floating-card { position: static; margin: 14px auto 0; width: 100%; }
}

@media print {
  .site-header, .site-footer, .builder-panel, .document-actions, .preview-toolbar, .back-to-top, .toast, .ad-slot, .affiliate-modal { display: none !important; }
  body { background: #fff; }
  .container, .app-shell { width: 100%; display: block; padding: 0; }
  .document-preview { border: 0; box-shadow: none; min-height: auto; }
}