/* DIY Furniture Joint Strength Guide - Styles */
:root {
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f0ebe4;
  --color-wood-dark: #5c3d2e;
  --color-wood: #8B5E3C;
  --color-wood-light: #D4A574;
  --color-wood-pale: #e8d5c0;
  --color-text: #2c2420;
  --color-text-muted: #6b5d54;
  --color-accent: #c47a3a;
  --color-accent-hover: #a8652e;
  --color-success: #4a7c59;
  --color-warning: #b8860b;
  --color-border: #d9cfc5;
  --color-focus: #4a90d9;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(92, 61, 46, 0.1);
  --shadow-lg: 0 4px 20px rgba(92, 61, 46, 0.15);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-wood-pale);
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-wood-dark);
  font-weight: 700;
  font-size: 1.1rem;
}

.nav { display: flex; gap: 24px; }
.nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav a:hover { color: var(--color-wood); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-wood-dark) 0%, var(--color-wood) 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}
.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
  background: var(--color-surface-alt);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-sm:hover { background: var(--color-wood-pale); }
.btn-full { width: 100%; margin-top: 20px; padding: 14px; font-size: 1rem; }

/* Sections */
section { padding: 60px 0; }
.section-intro {
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: 32px;
}

/* Selector Section */
.selector-section { background: var(--color-surface); }
.selector-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
}

.selector-main h2,
.comparison-section h2,
.scenarios-section h2,
.mistakes-section h2 {
  font-size: 1.6rem;
  margin-bottom: 8px;
  color: var(--color-wood-dark);
}

/* Form */
.selector-form fieldset {
  border: none;
  margin-bottom: 28px;
}

.selector-form legend {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 12px;
  color: var(--color-wood-dark);
}

.field-hint {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.radio-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  background: var(--color-bg);
}

.radio-card:hover { border-color: var(--color-wood-light); }
.radio-card input { margin-top: 3px; accent-color: var(--color-wood); }
.radio-card:has(input:checked) {
  border-color: var(--color-wood);
  background: var(--color-surface-alt);
}

.radio-label { display: flex; flex-direction: column; }
.radio-label strong { font-size: 0.95rem; }
.radio-label small { font-size: 0.8rem; color: var(--color-text-muted); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.field select {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
}
.field select:focus {
  outline: none;
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

/* Presets */
.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.presets-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.preset-btn {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-bg);
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.2s;
}
.preset-btn:hover {
  background: var(--color-wood-pale);
  border-color: var(--color-wood-light);
}

/* Results */
.results { margin-top: 32px; }
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.results-header h3 { font-size: 1.15rem; color: var(--color-wood-dark); }
.results-actions { display: flex; gap: 8px; }

.results-list { display: flex; flex-direction: column; gap: 16px; }

.result-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  background: var(--color-bg);
  transition: border-color 0.2s;
}
.result-card.top-pick {
  border-color: var(--color-wood);
  background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-bg) 100%);
}
.result-card.top-pick::before {
  content: "Top Pick";
  display: inline-block;
  background: var(--color-wood);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.result-name { font-weight: 700; font-size: 1.1rem; color: var(--color-wood-dark); }
.result-rating { display: flex; gap: 4px; align-items: center; }
.stars { color: var(--color-accent); font-size: 1rem; letter-spacing: 2px; }
.stars-empty { color: var(--color-border); }
.result-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}
.result-meta span { display: flex; align-items: center; gap: 4px; }
.result-why { font-size: 0.95rem; margin-bottom: 8px; }
.result-warning {
  font-size: 0.85rem;
  color: var(--color-warning);
  background: rgba(184, 134, 11, 0.08);
  padding: 8px 12px;
  border-radius: var(--radius);
  border-left: 3px solid var(--color-warning);
}

.results-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}
.empty-state svg { margin-bottom: 16px; opacity: 0.5; }

/* Side panel */
.selector-side {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.side-card {
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--color-border);
}
.side-card h3 {
  font-size: 1rem;
  color: var(--color-wood-dark);
  margin-bottom: 10px;
}
.side-card p, .side-card li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.side-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.side-card li::before {
  content: "✓ ";
  color: var(--color-success);
  font-weight: 700;
}

.saved-project {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s;
}
.saved-project:hover { border-color: var(--color-wood-light); }
.saved-project .sp-name { font-weight: 600; color: var(--color-wood-dark); }
.saved-project .sp-details { color: var(--color-text-muted); font-size: 0.8rem; }

.muted { color: var(--color-text-muted); font-size: 0.9rem; }

/* Comparison Table */
.comparison-section { background: var(--color-surface); }
.table-wrap { overflow-x: auto; }
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.comparison-table th {
  background: var(--color-wood-dark);
  color: #fff;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}
.comparison-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}
.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--color-wood-dark);
}
.comparison-table tbody tr:hover { background: var(--color-surface-alt); }
.table-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}
.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
}
.scenario-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}
.scenario-tag.beginner { background: #e8f5e9; color: #2e7d32; }
.scenario-tag.intermediate { background: #fff3e0; color: #e65100; }
.scenario-tag.advanced { background: #fce4ec; color: #c62828; }
.scenario-card h3 {
  font-size: 1.1rem;
  color: var(--color-wood-dark);
  margin-bottom: 12px;
  padding-right: 80px;
}
.scenario-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}
.scenario-card strong { color: var(--color-text); }

/* Mistakes */
.mistakes-section { background: var(--color-surface); }
.mistakes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.mistake-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  border-left: 4px solid var(--color-warning);
}
.mistake-card h3 {
  font-size: 1.05rem;
  color: var(--color-wood-dark);
  margin-bottom: 10px;
}
.mistake-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.mistake-card strong { color: var(--color-text); }

.why-this-exists {
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--color-border);
}
.why-this-exists h3 {
  font-size: 1.1rem;
  color: var(--color-wood-dark);
  margin-bottom: 12px;
}
.why-this-exists p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

/* Footer */
.site-footer {
  background: var(--color-wood-dark);
  color: rgba(255,255,255,0.8);
  padding: 40px 0;
  font-size: 0.9rem;
}
.footer-links {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
}
.footer-links a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
}
.footer-links a:hover { text-decoration: underline; }
.footer-note { font-size: 0.85rem; opacity: 0.7; }
.footer-note a { color: var(--color-wood-light); }

/* Focus styles for accessibility */
*:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .site-header, .site-footer, .selector-side, .presets, .results-actions, .btn { display: none !important; }
  .results { display: block !important; }
  body { background: #fff; }
  section { padding: 20px 0; }
  .result-card { break-inside: avoid; }
}

/* Responsive */
@media (max-width: 900px) {
  .selector-layout { grid-template-columns: 1fr; }
  .selector-side { position: static; }
}

@media (max-width: 640px) {
  .hero { padding: 48px 0; }
  .hero h1 { font-size: 1.6rem; }
  .form-row { grid-template-columns: 1fr; }
  .radio-group { grid-template-columns: 1fr; }
  .results-header { flex-direction: column; align-items: flex-start; }
  .scenario-grid, .mistakes-grid { grid-template-columns: 1fr; }
  .nav { gap: 14px; }
  .nav a { font-size: 0.8rem; }
  .comparison-table { font-size: 0.8rem; }
  .comparison-table th, .comparison-table td { padding: 8px 10px; }
}


/* 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;
}