body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}:root{--primary-color:#6a52ff;--secondary-color:#ff9d42;--text-color:#333;--light-bg:#fff;--border-radius:8px;--box-shadow:0 4px 6px #0000001a}.App{color:var(--text-color);display:flex;flex-direction:column;min-height:100vh}.app-main{box-sizing:border-box;flex:1 1;margin:0 auto;max-width:1200px;padding:20px;width:100%}.btn{background-color:var(--primary-color);border-radius:var(--border-radius);font-size:16px;transition:all .3s ease}.btn:hover{background-color:#5843d9;box-shadow:var(--box-shadow)}.btn-secondary{background-color:var(--secondary-color)}.btn-secondary:hover{background-color:#e88c31}.card{background-color:var(--light-bg);border-radius:var(--border-radius);box-shadow:var(--box-shadow);margin-bottom:20px}.chord-progression-generator{display:flex;flex-direction:column;gap:20px;margin:0 auto;max-width:1200px;padding:20px;width:100%}.card{background-color:#fff;border-radius:8px;box-shadow:0 4px 12px #0000001a;padding:20px;transition:all .3s ease}.control-panel{position:relative}.control-panel h2{color:#333;font-size:1.8rem;font-weight:600;margin-bottom:20px;margin-top:0;text-align:center}.controls{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin-bottom:20px}.control-group{display:flex;flex-direction:column;gap:8px}.control-group label{color:#555;font-size:.9rem;font-weight:500}.control-group input[type=range],.control-group 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