:root {
  --bg: #0f1221;
  --bg-elev: #1a1e35;
  --bg-soft: #242947;
  --border: #2f3557;
  --text: #e7e9f5;
  --text-muted: #9aa0c2;
  --accent: #f5b742;
  --accent-soft: #f5b74220;
  --success: #4caf8a;
  --danger: #e05c74;
  --guitar: #e05c74;
  --piano: #4caf8a;
  --uke: #4bb8e0;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

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

html, body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

body {
  min-height: 100vh;
  background-image: radial-gradient(circle at 10% 10%, #1d234d 0%, transparent 40%), radial-gradient(circle at 90% 90%, #2a1e4d 0%, transparent 40%);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  background: rgba(15,18,33,0.8);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
}

.logo svg { flex-shrink: 0; }

nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--text-muted); font-size: 0.95rem; }
nav a:hover { color: var(--accent); text-decoration: none; }

main { padding: 32px 0 60px; }

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  margin-bottom: 10px;
}

h2 {
  font-size: 1.4rem;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--accent);
}

h3 { font-size: 1.1rem; margin-bottom: 8px; }

p { margin-bottom: 14px; color: var(--text-muted); }

.hero {
  text-align: center;
  padding: 40px 0 20px;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 24px;
  font-size: 1.05rem;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.workspace {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
}

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

.form-group { display: flex; flex-direction: column; gap: 6px; }

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="text"], select, textarea {
  padding: 10px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

input[type="text"]:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  min-height: 90px;
  resize: vertical;
  font-family: 'Courier New', monospace;
  font-size: 1.05rem;
  line-height: 1.8;
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

button {
  padding: 10px 18px;
  background: var(--accent);
  color: #1a1e35;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  font-family: inherit;
}

button:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(245,183,66,0.3); }
button:active { transform: translateY(0); }

button.secondary {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
}

button.secondary:hover { border-color: var(--accent); box-shadow: none; }

.presets {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.presets h3 { color: var(--text-muted); font-size: 0.9rem; }

.preset-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.preset-btn {
  padding: 6px 14px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s;
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.results {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
  display: none;
}

.results.visible { display: block; }

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.results-header h2 { margin: 0; }

.transposed-text {
  font-family: 'Courier New', monospace;
  font-size: 1.4rem;
  background: var(--bg-soft);
  padding: 18px;
  border-radius: 6px;
  margin-bottom: 20px;
  border-left: 4px solid var(--accent);
  letter-spacing: 1px;
  word-spacing: 6px;
}

.instrument-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.tab-btn {
  padding: 10px 18px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  border-radius: 0;
  font-size: 0.95rem;
}

.tab-btn:hover { color: var(--text); transform: none; box-shadow: none; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-btn[data-instrument="guitar"].active { color: var(--guitar); border-bottom-color: var(--guitar); }
.tab-btn[data-instrument="piano"].active { color: var(--piano); border-bottom-color: var(--piano); }
.tab-btn[data-instrument="uke"].active { color: var(--uke); border-bottom-color: var(--uke); }

.chord-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 14px;
}

.chord-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 10px;
  text-align: center;
  transition: border-color 0.2s;
}

.chord-card:hover { border-color: var(--accent); }

.chord-card svg {
  display: block;
  margin: 0 auto 8px;
}

.chord-card .chord-name {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 4px;
}

.chord-card .chord-type {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state svg { margin-bottom: 12px; opacity: 0.5; }

.history-panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.history-panel h2 { margin-top: 0; }

.history-list { list-style: none; }

.history-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.history-list li:last-child { border-bottom: none; }

.history-item-text {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  flex: 1;
  min-width: 200px;
}

.history-item-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.history-empty {
  color: var(--text-muted);
  font-style: italic;
  padding: 20px 0;
}

.content-section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 28px;
}

.content-section h2:first-child { margin-top: 0; }

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.tip-card {
  background: var(--bg-soft);
  padding: 16px;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.tip-card h3 { font-size: 1rem; margin-bottom: 6px; }
.tip-card p { font-size: 0.9rem; margin-bottom: 0; }

.affiliate-box {
  background: linear-gradient(135deg, #1a1e35 0%, #2a2e55 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin: 28px 0;
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.affiliate-box svg { flex-shrink: 0; }
.affiliate-box .affiliate-text { flex: 1; min-width: 200px; }
.affiliate-box h3 { color: var(--accent); }
.affiliate-box p { font-size: 0.9rem; margin-bottom: 10px; }

footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

.ad-slot {
  margin: 20px 0;
  text-align: center;
  min-height: 60px;
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 24px 0 10px; }
  .workspace, .results, .history-panel, .content-section { padding: 18px; }
  .transposed-text { font-size: 1.1rem; }
  .chord-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  nav { gap: 12px; }
}

@media print {
  header, footer, .btn-row, .presets, .history-panel { display: none; }
  body { background: white; color: black; }
  .results { border: 1px solid #ccc; box-shadow: none; }
  .workspace { display: none; }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}



/* 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;
}