/* InvoiceSnap Styles */
:root {
  --c-teal: #0d9488;
  --c-teal-light: #ccfbf1;
  --c-teal-dark: #0f766e;
  --c-amber: #f59e0b;
  --c-amber-dark: #d97706;
  --c-bg: #fafaf9;
  --c-surface: #ffffff;
  --c-surface-alt: #f5f5f4;
  --text-primary: #1c1917;
  --text-secondary: #57534e;
  --text-muted: #a8a29e;
  --border: #e7e5e4;
  --border-focus: #0d9488;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1280px;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--c-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--c-teal); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus-visible { color: var(--c-teal-dark); text-decoration: underline; }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

.skip-link {
  position: absolute; top: -100%;
  background: var(--c-teal); color: #fff;
  padding: 8px 16px; border-radius: 0 0 var(--radius) var(--radius);
  z-index: 100; font-weight: 600;
}
.skip-link:focus { top: 0; }

/* Header */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1.125rem; color: var(--text-primary);
}
.logo:hover, .logo:focus-visible { text-decoration: none; color: var(--text-primary); }
.logo-icon { flex-shrink: 0; }
.main-nav ul { display: flex; list-style: none; gap: 24px; }
.main-nav a { font-size: 0.9375rem; font-weight: 500; color: var(--text-secondary); }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--c-teal); text-decoration: none; }

/* Hero */
.hero-section {
  background: linear-gradient(135deg, #134e4a 0%, #0d9488 60%, #f59e0b 100%);
  color: #fff; padding: 48px 0 40px;
}
.hero-section h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; line-height: 1.2; }
.hero-sub { font-size: 1.0625rem; opacity: 0.9; max-width: 560px; margin-bottom: 24px; }
.hero-stats { display: flex; gap: 32px; }
.hero-stats .stat { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 1.25rem; font-weight: 800; }
.hero-stats span { font-size: 0.8125rem; opacity: 0.8; }

/* Builder Section */
.builder-section { padding: 32px 0 48px; }
.builder-layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 32px;
  align-items: start;
}
.form-panel, .preview-panel {
  background: var(--c-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.panel-header { margin-bottom: 20px; }
.panel-header h2 { font-size: 1.25rem; font-weight: 700; }
.panel-sub { font-size: 0.875rem; color: var(--text-secondary); margin-top: 2px; }

/* Form Elements */
.form-block {
  border: none; margin-bottom: 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.form-block legend {
  font-size: 0.9375rem; font-weight: 700;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
  margin-bottom: 4px; width: 100%;
}
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 0.8125rem; font-weight: 600; color: var(--text-secondary); }
input[type="text"], input[type="email"], input[type="number"], input[type="date"],
select, textarea {
  font-family: inherit; font-size: 0.9375rem;
  padding: 8px 12px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--c-surface);
  color: var(--text-primary); transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(13,148,136,0.15);
}
::placeholder { color: var(--text-muted); }
.form-grid { display: grid; gap: 12px; }
.form-grid-2 { grid-template-columns: 1fr 1fr; }
.checkbox-field { flex-direction: row; align-items: center; gap: 8px; }
.checkbox-field input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--c-teal); }
.checkbox-field label { font-weight: 500; }

/* Hours Grid */
.hours-grid { display: flex; flex-direction: column; gap: 4px; }
.hours-header {
  display: grid; grid-template-columns: 56px 80px 1fr;
  gap: 8px; padding: 0 4px;
  font-size: 0.75rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.hours-row {
  display: grid; grid-template-columns: 56px 80px 1fr;
  gap: 8px; align-items: center;
}
.day-label {
  font-size: 0.8125rem; font-weight: 600; color: var(--text-secondary);
}
.hours-input { text-align: center; }
.hours-total-line {
  margin-top: 8px; font-size: 0.875rem; color: var(--text-secondary);
  text-align: right;
}
.hours-total-line strong { color: var(--c-teal-dark); }

/* Line Items */
.line-items { display: flex; flex-direction: column; gap: 8px; }
.line-item-row {
  display: grid; grid-template-columns: 1fr 72px 80px 96px 32px;
  gap: 8px; align-items: center;
}
.line-item-row input { font-size: 0.875rem; }
.line-item-row .line-amount {
  font-size: 0.875rem; font-weight: 600; color: var(--text-secondary);
  text-align: right;
}
.btn-remove {
  width: 28px; height: 28px; border: none; background: transparent;
  color: var(--text-muted); font-size: 1.25rem; cursor: pointer;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.btn-remove:hover { background: #fee2e2; color: #dc2626; }
.line-subtotal {
  text-align: right; font-size: 0.8125rem; color: var(--text-secondary);
  padding-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 10px 20px; font-family: inherit; font-size: 0.9375rem;
  font-weight: 600; border-radius: var(--radius); border: 2px solid transparent;
  cursor: pointer; transition: all var(--transition);
}
.btn-primary { background: var(--c-teal); color: #fff; border-color: var(--c-teal); }
.btn-primary:hover { background: var(--c-teal-dark); border-color: var(--c-teal-dark); }
.btn-secondary { background: var(--c-surface); color: var(--c-teal); border-color: var(--c-teal); }
.btn-secondary:hover { background: var(--c-teal-light); }
.btn-ghost { background: transparent; color: var(--text-secondary); padding: 8px 14px; font-size: 0.875rem; }
.btn-ghost:hover { background: var(--c-surface-alt); color: var(--text-primary); text-decoration: none; }
.form-actions {
  display: flex; flex-wrap: wrap; gap: 10px; padding-top: 8px;
}

/* Preview Panel */
.preview-sticky { position: sticky; top: 72px; }
.invoice-preview {
  background: var(--c-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  font-size: 0.8125rem;
}
.invoice-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 16px; padding-bottom: 12px;
  border-bottom: 2px solid var(--c-teal);
}
.invoice-title { font-size: 1.5rem; font-weight: 800; color: var(--c-teal); letter-spacing: 0.04em; }
.invoice-meta { text-align: right; }
.invoice-meta span { display: block; }
.invoice-meta span:first-child { font-weight: 700; }
.invoice-meta span:last-child { color: var(--text-muted); font-size: 0.75rem; }
.invoice-parties { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.invoice-from, .invoice-to { display: flex; flex-direction: column; gap: 2px; }
.party-label { font-size: 0.6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.invoice-period { margin-bottom: 12px; }
.invoice-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.invoice-table th {
  text-align: left; font-size: 0.6875rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted);
  padding: 6px 4px; border-bottom: 1px solid var(--border);
}
.invoice-table td { padding: 6px 4px; border-bottom: 1px solid var(--border); }
.invoice-table td:nth-child(2), .invoice-table td:nth-child(3), .invoice-table td:nth-child(4) { text-align: right; }
.invoice-table .empty-row td { text-align: center; color: var(--text-muted); padding: 20px 4px; }
.invoice-totals { display: flex; flex-direction: column; gap: 4px; padding-top: 8px; border-top: 1px solid var(--border); }
.total-row { display: flex; justify-content: space-between; font-size: 0.8125rem; }
.total-final { font-size: 1rem; font-weight: 800; color: var(--c-teal-dark); padding-top: 4px; border-top: 1px solid var(--border); margin-top: 4px; }
.invoice-notes-preview { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.invoice-notes-preview p { color: var(--text-secondary); margin-top: 4px; }

/* History */
.history-section { padding: 40px 0; background: var(--c-surface); border-top: 1px solid var(--border); }
.history-section h2 { font-size: 1.375rem; font-weight: 700; margin-bottom: 4px; }
.section-sub { color: var(--text-secondary); font-size: 0.9375rem; margin-bottom: 20px; }
.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-item {
  display: grid; grid-template-columns: 1fr auto auto;
  gap: 16px; align-items: center;
  padding: 14px 18px; background: var(--c-bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  transition: box-shadow var(--transition);
}
.history-item:hover { box-shadow: var(--shadow-sm); }
.history-info { display: flex; flex-direction: column; gap: 2px; }
.history-client { font-weight: 600; font-size: 0.9375rem; }
.history-meta { font-size: 0.8125rem; color: var(--text-secondary); }
.history-total { font-weight: 700; font-size: 1.0625rem; color: var(--c-teal-dark); }
.history-actions { display: flex; gap: 6px; }
.history-actions .btn { padding: 6px 12px; font-size: 0.8125rem; }
.empty-state { color: var(--text-muted); text-align: center; padding: 32px; }

/* Guide */
.guide-section { padding: 48px 0; }
.guide-section h2 { font-size: 1.375rem; font-weight: 700; margin-bottom: 4px; }
.guide-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; margin-top: 24px;
}
.guide-card {
  background: var(--c-surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
}
.guide-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--c-teal-dark); }
.guide-card p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.65; }

/* Assumptions */
.assumptions-section { padding: 40px 0; background: var(--c-surface-alt); border-top: 1px solid var(--border); }
.assumptions-section h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 16px; }
.assumptions-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.assumptions-list li {
  font-size: 0.875rem; color: var(--text-secondary); padding-left: 20px; position: relative;
}
.assumptions-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; background: var(--c-amber); border-radius: 50%;
}

/* Footer */
.site-footer {
  background: var(--c-surface); border-top: 1px solid var(--border);
  padding: 32px 0; margin-top: auto;
}
.footer-inner { display: flex; flex-direction: column; gap: 16px; }
.footer-brand { display: flex; flex-direction: column; gap: 2px; }
.footer-brand .logo-text { font-weight: 700; font-size: 1rem; }
.footer-tag { font-size: 0.8125rem; color: var(--text-muted); }
.footer-nav ul { display: flex; flex-wrap: wrap; gap: 16px; list-style: none; }
.footer-nav a { font-size: 0.875rem; color: var(--text-secondary); }
.footer-nav a:hover { color: var(--c-teal); }
.footer-copy { font-size: 0.75rem; color: var(--text-muted); }

/* Toast */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--text-primary); color: #fff;
  padding: 12px 20px; border-radius: var(--radius);
  font-size: 0.875rem; font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  transform: translateY(80px); opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* Print */
@media print {
  .site-header, .site-footer, .hero-section, .history-section,
  .guide-section, .assumptions-section, .form-panel,
  .form-actions, .toast, .skip-link { display: none !important; }
  body { background: #fff; }
  .builder-section { padding: 0; }
  .builder-layout { display: block; }
  .preview-panel { border: none; padding: 0; }
  .preview-sticky { position: static; }
  .invoice-preview { border: none; padding: 0; }
}

/* Responsive */
@media (max-width: 1024px) {
  .builder-layout { grid-template-columns: 1fr; }
  .preview-panel { order: -1; }
  .preview-sticky { position: static; }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .header-inner { height: 48px; }
  .main-nav ul { gap: 14px; }
  .hero-section { padding: 32px 0 28px; }
  .hero-section h1 { font-size: 1.5rem; }
  .hero-stats { gap: 20px; }
  .form-panel, .preview-panel { padding: 16px; }
  .form-grid-2 { grid-template-columns: 1fr; }
  .hours-header { grid-template-columns: 48px 64px 1fr; }
  .hours-row { grid-template-columns: 48px 64px 1fr; }
  .line-item-row { grid-template-columns: 1fr 60px 72px; }
  .line-item-row .line-amount { display: none; }
  .line-item-row .btn-remove { grid-column: 1 / -1; justify-self: end; }
  .invoice-parties { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .history-item { grid-template-columns: 1fr; gap: 8px; }
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; }
}

/* Focus visible */
*:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}