:root{--bg: #0f1119;--surface: #181b27;--border: #2a2f40;--text: #e2e8f0;--muted: #94a3b8;--accent: #22c55e;--orb: #f59e0b}*{box-sizing:border-box}body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;padding:16px}.wrap{width:100%;max-width:min(960px,calc(100vw - 32px));margin:0 auto}h1{font-size:1.2rem;margin:0 0 8px}p.lead{margin:0 0 16px;color:var(--muted);font-size:.92rem}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:14px}.panel__h{font-size:1rem;margin:0 0 8px;color:var(--muted);font-weight:600}.panel__hint{margin:0 0 12px;font-size:.88rem;color:var(--muted)}.chord-type-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 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