/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-wood:#8B5E3C;--c-wood-dark:#6B4226;--c-wood-light:#A67B5B;
  --c-cream:#FFF8F0;--c-cream-dark:#F5E6D3;
  --c-ink:#2C1810;--c-ink-light:#5C4033;
  --c-sage:#7A9E7E;--c-sage-light:#B8D4BA;
  --c-amber:#D4845A;--c-amber-light:#F0C4A0;
  --c-sky:#7BA7CC;--c-sky-light:#B8D4E8;
  --c-plum:#9B7BB8;--c-plum-light:#CDB8E0;
  --c-jade:#5DA88A;--c-jade-light:#A0D4C0;
  --radius:12px;--radius-sm:8px;
  --shadow:0 2px 8px rgba(44,24,16,0.10);--shadow-lg:0 8px 32px rgba(44,24,16,0.14);
  --font:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);color:var(--c-ink);background:var(--c-cream);line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto}
.container{width:100%;max-width:1100px;margin:0 auto;padding:0 20px}
/* ===== Header ===== */
.site-header{background:var(--c-wood);padding:12px 0;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--c-cream);font-weight:700;font-size:1.1rem}
.logo svg{flex-shrink:0}
.main-nav{display:flex;gap:8px;flex-wrap:wrap}
.nav-link{color:var(--c-cream);text-decoration:none;padding:6px 14px;border-radius:var(--radius-sm);font-size:0.9rem;transition:background 0.2s}
.nav-link:hover,.nav-link:focus{background:rgba(255,255,255,0.15);outline:none}
/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border:none;border-radius:var(--radius-sm);font-family:var(--font);font-size:0.95rem;font-weight:600;cursor:pointer;transition:all 0.2s}
.btn-primary{background:var(--c-wood);color:#fff}
.btn-primary:hover{background:var(--c-wood-dark)}
.btn-ghost{background:transparent;color:var(--c-wood);border:2px solid var(--c-wood-light)}
.btn-ghost:hover{background:var(--c-cream-dark)}
.btn-small{padding:6px 14px;font-size:0.85rem}
/* ===== Explorer Section ===== */
.section-explorer{padding:40px 0 20px}
.explorer-layout{display:grid;grid-template-columns:320px 1fr;gap:32px;align-items:start}
.chord-controls{position:sticky;top:80px}
.chord-controls h1{font-size:1.6rem;color:var(--c-wood-dark);margin-bottom:8px}
.subtitle{color:var(--c-ink-light);font-size:0.95rem;margin-bottom:20px}
.control-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.control-group{display:flex;flex-direction:column;gap:4px}
.control-group label{font-size:0.8rem;font-weight:600;color:var(--c-ink-light);text-transform:uppercase;letter-spacing:0.5px}
.control-group select{padding:8px 12px;border:2px solid var(--c-cream-dark);border-radius:var(--radius-sm);font-family:var(--font);font-size:0.95rem;background:#fff;color:var(--c-ink);cursor:pointer;min-width:100px}
.control-group select:focus{outline:2px solid var(--c-wood-light);outline-offset:1px}
.filter-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px;align-items:center}
.filter-group{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.filter-label{font-size:0.8rem;font-weight:600;color:var(--c-ink-light);text-transform:uppercase}
.filter-btn{padding:5px 12px;border:2px solid var(--c-cream-dark);border-radius:20px;background:#fff;color:var(--c-ink);font-family:var(--font);font-size:0.85rem;cursor:pointer;transition:all 0.2s}
.filter-btn:hover{border-color:var(--c-wood-light)}
.filter-btn.active,.filter-btn[aria-pressed="true"]{background:var(--c-wood);color:#fff;border-color:var(--c-wood)}
.action-row{display:flex;gap:10px}
/* ===== Results ===== */
.chord-heading{display:flex;align-items:baseline;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.chord-heading h2{font-size:1.8rem;color:var(--c-wood-dark)}
.voicing-count{font-size:0.9rem;color:var(--c-ink-light)}
.voicing-cards{display:flex;flex-direction:column;gap:16px}
.voicing-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;cursor:pointer;transition:box-shadow 0.2s,border-color 0.2s;border:2px solid transparent}
.voicing-card:hover,.voicing-card:focus-within{box-shadow:var(--shadow-lg);border-color:var(--c-wood-light)}
.voicing-card-header{display:flex;align-items:center;gap:16px;margin-bottom:12px;flex-wrap:wrap}
.voicing-fret{font-size:0.85rem;font-weight:700;color:var(--c-wood);background:var(--c-cream-dark);padding:4px 10px;border-radius:20px}
.voicing-mood{font-size:0.85rem;font-weight:600;padding:4px 12px;border-radius:20px}
.voicing-mood.mellow{background:var(--c-amber-light);color:var(--c-wood-dark)}
.voicing-mood.bright{background:var(--c-sky-light);color:#2C5F7C}
.voicing-mood.jazzy{background:var(--c-plum-light);color:#4A2D6B}
.voicing-mood.full{background:var(--c-jade-light);color:#2C5F4A}
.voicing-difficulty{display:flex;gap:2px;margin-left:auto}
.star{font-size:1.1rem;color:var(--c-cream-dark)}
.star.filled{color:var(--c-amber)}
.voicing-body{display:grid;grid-template-columns:140px 1fr;gap:16px;align-items:start}
.voicing-diagram{flex-shrink:0}
.voicing-info p{font-size:0.9rem;color:var(--c-ink-light);margin-bottom:6px}
.voicing-info .fingering{font-weight:600;color:var(--c-ink)}
.voicing-info .description{font-style:italic;color:var(--c-ink-light)}
.voicing-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.tag{font-size:0.75rem;padding:3px 8px;border-radius:12px;background:var(--c-cream-dark);color:var(--c-ink-light)}
/* ===== Fretboard SVG ===== */
.fretboard-svg{width:130px;height:160px}
/* ===== Progression Panel ===== */
.progression-panel{margin-top:20px;background:var(--c-cream-dark);border-radius:var(--radius);padding:20px}
.progression-panel.hidden{display:none}
.progression-panel h3{font-size:1.1rem;color:var(--c-wood-dark);margin-bottom:12px}
.prog-item{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid rgba(139,94,60,0.15)}
.prog-item:last-child{border-bottom:none}
.prog-chord{font-weight:700;color:var(--c-wood);font-size:1.05rem;min-width:60px}
.prog-desc{font-size:0.9rem;color:var(--c-ink-light);flex:1}
.prog-go{padding:4px 14px;font-size:0.8rem}
/* ===== Guide Section ===== */
.section-guide{padding:50px 0;background:#fff}
.section-guide h2{font-size:1.5rem;color:var(--c-wood-dark);text-align:center;margin-bottom:30px}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.guide-card{background:var(--c-cream);border-radius:var(--radius);padding:24px;text-align:center}
.guide-step{width:36px;height:36px;border-radius:50%;background:var(--c-wood);color:#fff;font-weight:700;font-size:1rem;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.guide-card h3{font-size:1.05rem;color:var(--c-wood-dark);margin-bottom:8px}
.guide-card p{font-size:0.9rem;color:var(--c-ink-light)}
/* ===== Why Section ===== */
.section-why{padding:50px 0}
.section-why h2{font-size:1.5rem;color:var(--c-wood-dark);margin-bottom:16px}
.why-text p{font-size:0.95rem;color:var(--c-ink-light);margin-bottom:12px}
.why-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}
.assumptions-box{background:var(--c-cream-dark);border-radius:var(--radius);padding:20px;margin-top:20px}
.assumptions-box h4{font-size:0.95rem;color:var(--c-wood-dark);margin-bottom:10px}
.assumptions-box ul{padding-left:20px}
.assumptions-box li{font-size:0.88rem;color:var(--c-ink-light);margin-bottom:6px}
.common-mistakes{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.common-mistakes h3{font-size:1rem;color:var(--c-wood-dark);margin-bottom:12px}
.common-mistakes ul{padding-left:20px}
.common-mistakes li{font-size:0.88rem;color:var(--c-ink-light);margin-bottom:10px}
.common-mistakes strong{color:var(--c-ink)}
/* ===== Cheat Sheet ===== */
.section-cheatsheet{padding:50px 0;background:#fff}
.section-cheatsheet h2{font-size:1.5rem;color:var(--c-wood-dark);margin-bottom:8px}
.cheatsheet-intro{color:var(--c-ink-light);margin-bottom:20px;font-size:0.95rem}
.printable-sheet{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:24px}
.sheet-chord-item{background:var(--c-cream);border-radius:var(--radius-sm);padding:16px;text-align:center}
.sheet-chord-name{font-weight:700;font-size:1.1rem;color:var(--c-wood-dark);margin-bottom:8px}
.sheet-footer{grid-column:1/-1;text-align:center;font-size:0.8rem;color:var(--c-ink-light);padding-top:16px;border-top:1px solid var(--c-cream-dark)}
/* ===== History ===== */
.section-history{padding:40px 0}
.section-history h2{font-size:1.3rem;color:var(--c-wood-dark);margin-bottom:8px}
.history-note{color:var(--c-ink-light);font-size:0.9rem;margin-bottom:16px}
.history-list{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.history-chip{padding:8px 16px;background:#fff;border:2px solid var(--c-cream-dark);border-radius:20px;font-weight:600;color:var(--c-wood);cursor:pointer;font-family:var(--font);font-size:0.9rem;transition:all 0.2s}
.history-chip:hover{border-color:var(--c-wood-light);background:var(--c-cream-dark)}
.history-empty{color:var(--c-ink-light);font-style:italic;font-size:0.9rem}
/* ===== Footer ===== */
.site-footer{background:var(--c-wood);color:var(--c-cream);padding:30px 0 20px;margin-top:40px}
.footer-grid{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:16px;margin-bottom:16px}
.footer-brand p{font-size:0.85rem;opacity:0.8;margin-top:4px}
.footer-brand a{color:var(--c-cream)}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.footer-links a{color:var(--c-cream);text-decoration:none;font-size:0.85rem;opacity:0.8;transition:opacity 0.2s}
.footer-links a:hover{opacity:1}
.footer-note{font-size:0.8rem;opacity:0.6;text-align:center}
/* ===== Print Styles ===== */
@media print{
  .site-header,.site-footer,.section-guide,.section-why,.section-history,.filter-row,.action-row,.chord-controls,.progression-panel,.cheatsheet-intro,.btn{display:none!important}
  .section-cheatsheet{padding:0}
  .printable-sheet{grid-template-columns:repeat(3,1fr);gap:12px}
  .sheet-chord-item{break-inside:avoid;border:1px solid #ccc}
  body{background:#fff}
}
/* ===== Responsive ===== */
@media(max-width:860px){
  .explorer-layout{grid-template-columns:1fr}
  .chord-controls{position:static}
  .why-layout{grid-template-columns:1fr}
  .voicing-body{grid-template-columns:120px 1fr}
}
@media(max-width:560px){
  .control-row{flex-direction:column}
  .filter-row{flex-direction:column;align-items:flex-start}
  .voicing-body{grid-template-columns:1fr}
  .voicing-card-header{flex-direction:column;align-items:flex-start}
  .voicing-difficulty{margin-left:0}
  .chord-heading h2{font-size:1.4rem}
}



/* 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;
}