/* Skill Swap Matchmaker — styles.css */
:root {
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-200: #fde68a;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --amber-700: #b45309;
  --amber-800: #92400e;
  --amber-900: #78350f;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --red-500: #ef4444;
  --red-600: #dc2626;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
  --max-width: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--slate-800);
  background: var(--slate-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--amber-700); text-decoration: none; }
a:hover, a:focus-visible { color: var(--amber-800); text-decoration: underline; }

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

/* Header */
.site-header {
  background: white;
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--slate-900);
  font-weight: 700;
  font-size: 1.1rem;
}
.logo:hover, .logo:focus-visible { text-decoration: none; color: var(--slate-900); }
.logo-text { letter-spacing: -.01em; }

.main-nav { display: flex; gap: 24px; }
.main-nav a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--slate-600);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.main-nav a:hover, .main-nav a:focus-visible {
  color: var(--amber-700);
  border-bottom-color: var(--amber-400);
  text-decoration: none;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--amber-50) 0%, var(--amber-100) 50%, #fef9ee 100%);
  padding: 80px 0 70px;
  text-align: center;
  border-bottom: 1px solid var(--amber-200);
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--slate-900);
  line-height: 1.2;
  max-width: 700px;
  margin: 0 auto 16px;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--slate-600);
  max-width: 560px;
  margin: 0 auto 32px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, box-shadow .15s;
  text-decoration: none;
  line-height: 1.4;
}
.btn:hover, .btn:focus-visible { text-decoration: none; }
.btn-primary {
  background: var(--amber-500);
  color: white;
  border-color: var(--amber-500);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--amber-600);
  border-color: var(--amber-600);
  color: white;
  box-shadow: var(--shadow-md);
}
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-sm { padding: 7px 14px; font-size: .85rem; }
.btn-outline {
  background: transparent;
  color: var(--amber-700);
  border-color: var(--amber-400);
}
.btn-outline:hover, .btn-outline:focus-visible {
  background: var(--amber-50);
  border-color: var(--amber-600);
  color: var(--amber-800);
}

/* Sections */
section { padding: 64px 0; }
section:nth-child(even) { background: white; }

.section-intro {
  color: var(--slate-500);
  max-width: 640px;
  margin-bottom: 32px;
  font-size: 1.05rem;
}

h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 8px;
}
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--slate-800);
  margin-bottom: 12px;
}

/* Generator Layout */
.gen-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}
.gen-intro { color: var(--slate-500); margin-bottom: 24px; }

.skill-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.skill-panel {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.panel-icon { margin-right: 6px; }
.panel-hint {
  font-size: .85rem;
  color: var(--slate-400);
  margin-bottom: 16px;
}

.skill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.skill-btn {
  padding: 8px 14px;
  border-radius: 20px;
  border: 2px solid var(--slate-200);
  background: white;
  font-size: .85rem;
  font-weight: 500;
  color: var(--slate-700);
  cursor: pointer;
  transition: all .15s;
}
.skill-btn:hover, .skill-btn:focus-visible {
  border-color: var(--amber-400);
  background: var(--amber-50);
  color: var(--amber-800);
}
.skill-btn.selected {
  background: var(--amber-500);
  border-color: var(--amber-500);
  color: white;
}
.skill-btn.selected-want {
  background: var(--slate-700);
  border-color: var(--slate-700);
  color: white;
}

.custom-skill-row {
  display: flex;
  gap: 8px;
}
.custom-skill-row input {
  flex: 1;
  padding: 8px 12px;
  border: 2px solid var(--slate-200);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  outline: none;
  transition: border-color .15s;
}
.custom-skill-row input:focus {
  border-color: var(--amber-400);
}

/* Match Sidebar */
.match-sidebar {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.match-sidebar h2 { font-size: 1.2rem; margin-bottom: 16px; }
.match-empty {
  color: var(--slate-400);
  font-size: .9rem;
  text-align: center;
  padding: 32px 0;
}
.match-results { display: flex; flex-direction: column; gap: 12px; }

.match-card {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  padding: 16px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}
.match-card:hover, .match-card:focus-visible {
  border-color: var(--amber-400);
  box-shadow: var(--shadow-md);
}
.match-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.match-pair {
  font-weight: 600;
  font-size: .95rem;
  color: var(--slate-800);
}
.match-score {
  font-weight: 700;
  font-size: 1.1rem;
  padding: 2px 10px;
  border-radius: 20px;
}
.score-excellent { background: #dcfce7; color: #166534; }
.score-good { background: var(--amber-100); color: var(--amber-800); }
.score-fair { background: #fef9c3; color: #854d0e; }
.score-low { background: #fee2e2; color: #991b1b; }

.match-detail {
  font-size: .85rem;
  color: var(--slate-500);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--slate-100);
}
.match-detail p { margin-bottom: 4px; }
.match-tips { font-style: italic; color: var(--slate-400); }

.match-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--slate-200);
}
.copy-confirm {
  font-size: .8rem;
  color: var(--green-600);
  margin-top: 8px;
}

/* Heatmap */
.heatmap-wrapper {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  overflow: hidden;
  background: white;
}
.heatmap-header, .heatmap-row {
  display: grid;
  grid-template-columns: 1.2fr .9fr 1fr 1fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  align-items: center;
  font-size: .85rem;
}
.heatmap-header {
  background: var(--slate-800);
  color: white;
  font-weight: 600;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.heatmap-row { border-top: 1px solid var(--slate-100); }
.heatmap-row:hover { background: var(--amber-50); }

.bar {
  background: var(--slate-100);
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
  width: 100%;
}
.bar-fill {
  height: 100%;
  background: var(--amber-400);
  border-radius: 4px;
  transition: width .3s;
}
.bar-high { background: var(--amber-600); }

.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: .75rem;
  font-weight: 600;
}
.tag-hot { background: #fee2e2; color: #991b1b; }
.tag-warm { background: var(--amber-100); color: var(--amber-800); }
.tag-supply { background: #dbeafe; color: #1e40af; }
.tag-rare { background: #dcfce7; color: #166534; }

.heatmap-note {
  font-size: .8rem;
  color: var(--slate-400);
  margin-top: 12px;
}

/* Agreements */
.agreement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.agreement-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.agreement-card h3 { margin-bottom: 16px; }

.template-box {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-size: .85rem;
  line-height: 1.7;
  margin-bottom: 12px;
  max-height: 300px;
  overflow-y: auto;
}
.template-box p { margin-bottom: 6px; }

.mistake-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mistake-list li {
  font-size: .9rem;
  color: var(--slate-600);
  padding-left: 20px;
  position: relative;
}
.mistake-list li::before {
  content: "!";
  position: absolute;
  left: 0;
  top: 0;
  background: var(--amber-100);
  color: var(--amber-700);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 700;
}

.pairing-list details {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}
.pairing-list summary {
  padding: 12px 16px;
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  background: var(--slate-50);
  transition: background .15s;
}
.pairing-list summary:hover { background: var(--amber-50); }
.pairing-list details p {
  padding: 12px 16px;
  font-size: .85rem;
  color: var(--slate-600);
  line-height: 1.6;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.about-block {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.about-block h3 { margin-bottom: 8px; }
.about-block p { color: var(--slate-600); font-size: .95rem; }

/* Footer */
.site-footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 40px 0 24px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-brand p { font-size: .85rem; margin-top: 4px; }
.logo-text-sm { font-weight: 700; color: white; font-size: 1rem; }
.footer-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-nav a { color: var(--slate-400); font-size: .85rem; }
.footer-nav a:hover, .footer-nav a:focus-visible { color: var(--amber-400); }
.footer-bottom {
  border-top: 1px solid var(--slate-700);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .8rem;
}
.footer-bottom a { color: var(--amber-400); }

/* Responsive */
@media (max-width: 1024px) {
  .gen-layout { grid-template-columns: 1fr; }
  .match-sidebar { position: static; max-height: none; }
  .agreement-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .skill-columns { grid-template-columns: 1fr; }
  .agreement-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .main-nav { gap: 14px; }
  .main-nav a { font-size: .8rem; }
  .heatmap-header, .heatmap-row { grid-template-columns: 1fr .8fr .8fr .8fr .9fr; font-size: .75rem; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .site-header .container { flex-direction: column; height: auto; padding: 12px 20px; gap: 8px; }
  .main-nav { gap: 12px; }
  .hero h1 { font-size: 1.5rem; }
  .heatmap-header, .heatmap-row { grid-template-columns: 1fr 1fr; }
  .heatmap-header > *:nth-child(n+3), .heatmap-row > *:nth-child(n+3) { display: none; }
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 2px;
}

/* Print */
@media print {
  .site-header, .site-footer, .match-actions, .hero { display: none; }
  .match-sidebar { position: static; box-shadow: none; border: none; }
  body { background: white; }
  .skill-panel { break-inside: avoid; }
}



/* 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;
}