/* Estilos para la sección de acordes */
    .chords-container {
        padding: 1rem;
        background-color: #f8f9fa;
        border-radius: 10px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .accordion-button {
        font-weight: 600;
        color: #166088;
        background-color: rgba(22, 96, 136, 0.1);
    }

    .accordion-button:not(.collapsed) {
        color: white;
        background-color: #166088;
    }

    .accordion-button:not(.collapsed)::after {
        filter: brightness(0) invert(1);
    }

    .chords-filters {
        background-color: white;
        padding: 1.5rem;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .chords-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1.5rem;
        margin-top: 2rem;
    }

    .chord-card {
        background-color: white;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .chord-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
    }

    .chord-diagram {
        padding: 1rem;
        text-align: center;
        border-bottom: 1px solid #eee;
        position: relative;
    }

    .chord-name {
        font-size: 1.5rem;
        font-weight: bold;
        margin-bottom: 1rem;
        color: #166088;
    }

    .chord-info {
        padding: 1rem;
    }

    .chord-type {
        font-size: 0.9rem;
        color: #6c757d;
        margin-bottom: 0.5rem;
    }

    .chord-notes {
        font-size: 0.85rem;
        color: #495057;
        margin-bottom: 1rem;
    }

    .play-chord {
        width: 100%;
    }

    /* Estilos para el diagrama de guitarra */
    .guitar-neck {
        width: 160px;
        height: 180px;
        margin: 0 auto;
        position: relative;
    }

    .nut {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        background-color: #333;
        z-index: 2;
    }

    .frets {
        position: absolute;
        top: 5px;
        left: 0;
        width: 100%;
        height: calc(100% - 5px);
    }

    .fret {
        position: relative;
        height: 25%;
        border-bottom: 2px solid #ccc;
        display: flex;
    }

    .first-fret {
        height: 30%;
    }

    .fret-position {
        position: absolute;
        left: -20px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 10px;
        color: #666;
    }

    .strings {
        display: flex;
        width: 100%;
        height: 100%;
    }

    .string {
        flex: 1;
        position: relative;
    }

    .string::after {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        width: 2px;
        height: 100%;
        background-color: #666;
        transform: translateX(-50%);
    }

    .open-strings {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        display: flex;
    }

    .open-string {
        flex: 1;
        position: relative;
    }

    .finger-positions {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
    }

    .finger-dot {
        position: absolute;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background-color: #4a6fa5;
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 10px;
        font-weight: bold;
        transform: translate(-50%, -50%);
        z-index: 3;
    }

    .muted-string {
        position: absolute;
        top: -8px;
        left: 50%;
        transform: translateX(-50%);
        color: #ff4d4d;
        font-size: 16px;
        z-index: 3;
    }

    .barre {
        position: absolute;
        height: 20px;
        background-color: rgba(74, 111, 165, 0.7);
        border-radius: 10px;
        z-index: 2;
    }

    @media (max-width: 768px) {
        .chords-grid {
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        }
        
        .guitar-neck {
            width: 140px;
            height: 160px;
        }
    }

/* Estilos para el diagrama de piano */
.piano-keys {
    position: relative;
    width: 100%;
    max-width: 700px;
    margin: 2rem auto;
    aspect-ratio: 3/1;
    display: flex;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(0,0,0,0.15);
    background: linear-gradient(180deg, #fdfdfd, #eaeaea);
    transition: background 0.3s;
}
.piano-key {
    position: relative;
    flex: 1;
    border: 1px solid #ccc;
    box-sizing: border-box;
    transition: all 0.3s ease;
}
.white-key {
    background: #fff;
    z-index: 1;
    border-right: 1px solid #bbb;
}
.black-key {
    position: absolute;
    width: 60%;
    height: 60%;
    background: #222;
    z-index: 2;
    border-radius: 0 0 5px 5px;
    box-shadow: inset -2px -2px 5px rgba(0,0,0,0.4);
    transform-origin: bottom;
    transition: transform 0.3s, background 0.3s;
}
.piano-key.active {
    background-color: #4fc3f7;
    box-shadow: 0 0 15px #4fc3f7;
}
.piano-key.active.black-key {
    background-color: #166088;
    box-shadow: 0 0 10px #166088;
    transform: scaleY(0.95);
}
.finger {
    position: absolute;
    bottom: 5px;
    width: 100%;
    text-align: center;
    font-weight: bold;
    font-size: 0.85rem;
    color: #f8f9fa;
}