:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --surface-alt: #f0efeb;
  --border: #e2e0db;
  --text: #1e1e24;
  --text-muted: #5c5a55;
  --accent: #1a56db;
  --accent-hover: #1344b0;
  --accent-light: #e8effc;
  --success: #157a4c;
  --success-light: #e6f4ed;
  --warning: #b45309;
  --warning-light: #fef3e2;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  --font-serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}

.brand-icon {
  color: var(--accent);
  display: flex;
  align-items: center;
}

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

.site-nav a:hover { color: var(--accent); }

/* Hero */
.hero {
  padding: 64px 0 40px;
  max-width: 720px;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.2;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.hero-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}

/* Builder */
.builder-section {
  padding: 32px 0 64px;
}

.builder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.builder-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.builder-form h2 {
  margin: 0 0 24px;
  font-size: 1.3rem;
}

.form-group {
  border: none;
  padding: 0;
  margin: 0 0 28px;
}

.form-group legend {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text);
  padding: 0;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 4px;
  margin-top: 12px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea { resize: vertical; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 80px 100px;
  gap: 12px;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover { background: var(--surface-alt); }

/* Preview */
.builder-preview {
  position: sticky;
  top: 80px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 100px);
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.preview-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.preview-actions {
  display: flex;
  gap: 8px;
}

.preview-actions .btn {
  padding: 6px 14px;
  font-size: 0.82rem;
}

.letter-output {
  padding: 32px;
  overflow-y: auto;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.75;
  color: #2a2a2a;
  white-space: pre-wrap;
}

.letter-output .letter-date { margin-bottom: 24px; }
.letter-output .letter-recipient { margin-bottom: 24px; }
.letter-output .letter-subject { font-weight: 700; margin-bottom: 24px; text-decoration: underline; }
.letter-output .letter-body { margin-bottom: 24px; }
.letter-output .letter-close { margin-bottom: 8px; }
.letter-output .letter-signature { margin-bottom: 4px; }

.copy-notice {
  padding: 8px 24px;
  background: var(--success-light);
  color: var(--success);
  font-size: 0.85rem;
  font-weight: 500;
  border-top: 1px solid var(--border);
}

/* Guide */
.guide-section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.guide-section h2 {
  font-size: 1.5rem;
  margin: 0 0 24px;
}

.guide-sub {
  font-size: 1.2rem;
  margin: 48px 0 20px;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.guide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.guide-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--accent);
}

.guide-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.mistake-list,
.escalation-list {
  padding-left: 20px;
}

.mistake-list li,
.escalation-list li {
  margin-bottom: 12px;
  font-size: 0.92rem;
  color: var(--text);
}

.guide-note {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.state-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 16px 0;
}

.state-table th,
.state-table td {
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border);
}

.state-table th {
  background: var(--surface-alt);
  font-weight: 600;
}

.state-table tbody tr:nth-child(even) {
  background: var(--surface);
}

/* FAQ */
.faq-section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.faq-section h2 {
  font-size: 1.5rem;
  margin: 0 0 24px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--surface);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 400;
}

.faq-item[open] summary::after { content: "\2212"; }

.faq-item p {
  padding: 0 20px 16px;
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 64px;
}

.site-footer p {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
}

.footer-links a:hover { text-decoration: underline; }

.footer-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .builder-grid {
    grid-template-columns: 1fr;
  }
  .builder-preview {
    position: static;
    max-height: none;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .hero h1 { font-size: 1.8rem; }
  .preview-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  .preview-actions { flex-wrap: wrap; }
}

@media (max-width: 600px) {
  .site-header .container { flex-direction: column; height: auto; padding: 12px 24px; gap: 8px; }
  .hero { padding: 40px 0 24px; }
  .builder-form { padding: 20px; }
  .letter-output { padding: 20px; }
}

@media print {
  .site-header, .site-footer, .builder-form, .preview-actions, .preview-header h2, .form-actions { display: none !important; }
  .builder-grid { display: block; }
  .builder-preview { box-shadow: none; border: none; position: static; max-height: none; }
  .letter-output { padding: 0; font-size: 11pt; }
}


/* 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;
}