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var(--border-color);border-radius:8px;cursor:pointer;font-weight:700;font-size:.85rem;color:var(--text-primary);transition:all .2s ease}.chord-diagram-tab.active{background:var(--tab-active-bg);color:var(--tab-active-text);border-color:var(--tab-active-bg)}.chord-diagram-tab:hover:not(.active){background:var(--bg-tertiary)}.chord-diagram-content{display:none}.chord-diagram-content.active{display:block;animation:fadeIn .3s ease}.guitar-chord-diagram{display:flex;flex-direction:column;align-items:center;margin:20px 0}.guitar-chord-title{font-weight:700;font-size:1.15rem;margin-bottom:12px;color:var(--text-primary)}.guitar-fretboard{width:200px;height:250px;background:var(--fretboard-bg);border:2px solid var(--fretboard-wood);border-radius:6px;position:relative;display:flex;flex-direction:column;justify-content:space-between}.guitar-string{height:2px;width:100%;background:var(--text-secondary);position:relative}.guitar-fret{height:2px;width:100%;background:var(--fretboard-wood)}.guitar-finger{width:24px;height:24px;border-radius:50%;background:var(--accent-primary);color:#FFF;display:flex;align-items:center;justify-content:center;font-weight:700;position:absolute;transform:translate(-50%,-50%)}.guitar-nut{height:8px;width:100%;background:#D1D5DB;position:absolute;top:0;transform:translateY(-50%)}.guitar-string-labels{display:flex;width:100%;justify-content:space-around;margin-top:5px}.guitar-string-label{width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:var(--text-primary)}.guitar-fret-labels{display:flex;flex-direction:column;position:absolute;left:-25px;top:0;height:100%;justify-content:space-around}.guitar-fret-label{width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:var(--text-primary)}.guitar-chord-info{margin-top:16px;font-size:.88rem;color:var(--text-secondary)}.piano-chord-diagram{display:flex;flex-direction:column;align-items:center;margin:20px 0}.piano-chord-title{font-weight:700;font-size:1.15rem;margin-bottom:12px;color:var(--text-primary)}.mini-keyboard{display:flex;height:120px;width:210px;position:relative}.mini-white-key{background:#FFF;border:1px solid #d1d5db;width:30px;height:100%;position:relative;z-index:1;padding-bottom:10px;font-size:10px;color:#374151;border-radius:0 0 4px 4px}.mini-black-key,.mini-white-key{display:flex;align-items:flex-end;justify-content:center;font-weight:700}.mini-black-key{background:#1F2937;width:20px;height:60%;position:absolute;z-index:2;top:0;padding-bottom:5px;font-size:8px;color:#FFF;border-radius:0 0 3px 3px}.mini-key-in-chord{background:var(--accent-primary)}.mini-white-key.mini-key-in-chord{background:var(--accent-primary);color:#FFF}.mini-black-key.mini-key-in-chord{background:var(--accent-secondary)}.mini-finger{position:absolute;bottom:40px;width:20px;height:20px;border-radius:50%;background:rgba(255,255,255,.7);color:#374151;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:10px}.piano-chord-info{margin-top:16px;font-size:.88rem;color:var(--text-secondary)}.fixed-controls{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:10px;z-index:100}.theme-toggle{position:relative;display:flex;align-items:center;justify-content:center;width:42px;height:42px;background:var(--bg-secondary);border-radius:50%;cursor:pointer;border:1px solid var(--border-color);transition:all .2s ease;box-shadow:0 2px 12px rgba(0,0,0,.12)}.theme-toggle:hover{background:var(--bg-tertiary);transform:scale(1.1)}.theme-icon{width:20px;height:20px;fill:var(--text-primary)}.theme-label{display:none}.mute-button{position:relative;display:flex;align-items:center;justify-content:center;width:42px;height:42px;background:var(--bg-secondary);border-radius:50%;cursor:pointer;border:1px solid var(--border-color);transition:all .2s ease;box-shadow:0 2px 12px rgba(0,0,0,.12)}.mute-button:hover{background:var(--bg-tertiary);transform:scale(1.1)}.mute-icon{width:20px;height:20px;fill:var(--text-primary)}.mute-label{display:none}.tooltip{position:relative}.tooltip:hover:after{content:attr(data-tooltip);position:absolute;right:52px;top:50%;transform:translateY(-50%);background:var(--bg-primary);color:var(--text-primary);padding:5px 10px;border-radius:6px;font-size:11px;white-space:nowrap;box-shadow:0 2px 8px rgba(0,0,0,.15);border:1px solid var(--border-color)}.scale-select{width:auto;min-width:220px}.scale-select optgroup{font-weight:700;color:var(--accent-primary);padding:4px 0}.scale-select option{font-weight:400;color:var(--text-primary);padding:5px}