:root{--bg-color: #121212;--surface-color: #1e1e1e;--primary-color: #bb86fc;--secondary-color: #03dac6;--text-color: #e0e0e0;--text-muted: #a0a0a0;--border-color: #333;--chord-bg: rgba(187, 134, 252, .25);--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-chord: "Times New Roman", Times, serif}*{box-sizing:border-box}body{margin:0;padding:0;font-family:var(--font-sans);background-color:var(--bg-color);color:var(--text-color);height:100vh;display:flex;flex-direction:column}header{padding:1rem 2rem;background-color:var(--surface-color);border-bottom:1px solid var(--border-color);display:flex;flex-direction:column;gap:1rem}.header-top{display:flex;align-items:center;justify-content:space-between;width:100%}h1{margin:0;font-size:1.2rem;font-weight:600;color:var(--primary-color)}.controls{display:flex;gap:1.5rem;align-items:center;flex-wrap:wrap}.control-group{display:flex;align-items:center;gap:.5rem}.radio-group{display:flex;gap:.8rem;align-items:center;background:#ffffff0d;padding:.3rem .8rem;border-radius:4px}.radio-item{display:flex;align-items:center;gap:.3rem;font-size:.85rem;cursor:pointer}label{font-size:.9rem;color:var(--text-muted)}select,button{background-color:var(--bg-color);color:var(--text-color);border:1px solid var(--border-color);padding:.4rem .8rem;border-radius:4px;font-family:var(--font-sans);font-size:.9rem;cursor:pointer;transition:border-color .2s}select:hover,button:hover{border-color:var(--primary-color)}select:focus{outline:none;border-color:var(--primary-color)}.checkbox-wrapper{display:flex;align-items:center;gap:.5rem;cursor:pointer}input[type=checkbox],input[type=radio]{accent-color:var(--primary-color);cursor:pointer}.key-selector-container{width:100%;overflow-x:auto;padding-bottom:.5rem}.key-selector{display:inline-grid;grid-template-rows:auto auto;gap:4px}.key-option{display:flex;align-items:center;justify-content:center;position:relative}.key-option input[type=radio]{position:absolute;opacity:0;cursor:pointer;height:0;width:0}.key-label{display:flex;align-items:center;justify-content:center;width:3rem;height:2rem;background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:4px;font-size:.85rem;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none;color:var(--text-muted)}.key-option input[type=radio]:checked+.key-label{background-color:var(--primary-color);color:#000;border-color:var(--primary-color);font-weight:700}.key-option:hover .key-label{border-color:var(--primary-color)}main{flex:1;display:flex;padding:1rem;gap:1rem;overflow:hidden}.panel{flex:1;display:flex;flex-direction:column;background-color:var(--surface-color);border-radius:8px;border:1px solid var(--border-color);overflow:hidden}.panel-header{padding:.8rem 1rem;background-color:#ffffff08;border-bottom:1px solid var(--border-color);font-size:.9rem;font-weight:600;color:var(--text-muted);display:flex;justify-content:space-between}textarea,#outputArea{flex:1;width:100%;margin:0;padding:1rem;background-color:transparent;border:none;color:var(--text-color);font-family:var(--font-mono);font-size:14px;line-height:1.6;resize:none;outline:none;overflow:auto;white-space:pre}#outputArea{-webkit-user-select:text;user-select:text}.chord{border-radius:2px;color:#ffb366;font-weight:700;font-family:var(--font-chord)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-color)}::-webkit-scrollbar-thumb{background:#444;border-radius:5px}::-webkit-scrollbar-thumb:hover{background:#555}.back-link{display:block;margin:1rem;color:var(--primary-color);text-decoration:none;font-size:.9rem}.back-link:hover{text-decoration:underline}@media(max-width:768px){main{flex-direction:column}.header-top{flex-wrap:wrap;gap:1rem}.controls{gap:1rem}}