#contentBody {
    width: 990px !important;
}

#piano-container {
    background: rgba(255,255,255,0.9);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.1);
    box-sizing: border-box;
    width: 100%;
}

.keys-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

.key {
    width: 80px;
    height: 80px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
    cursor: pointer;
    user-select: none;
    transition: all 0.1s ease;
    border: 3px solid rgba(255,255,255,0.3);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}

.key::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.3);
    opacity: 0;
    transition: opacity 0.1s ease;
}

.key:hover::before {
    opacity: 1;
}

.key.active {
    transform: scale(0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.key.active::before {
    opacity: 1;
}

/* Farben für die einzelnen Tasten */
.key-a { background: linear-gradient(135deg, #FFD700, #FFA500); }
.key-s { background: linear-gradient(135deg, #32CD32, #228B22); }
.key-d { background: linear-gradient(135deg, #FF8C00, #FF4500); }
.key-f { background: linear-gradient(135deg, #4169E1, #1E90FF); }
.key-g { background: linear-gradient(135deg, #B0C4DE, #778899); color: #333; }
.key-h { background: linear-gradient(135deg, #B0C4DE, #778899); color: #333; }
.key-j { background: linear-gradient(135deg, #4169E1, #1E90FF); }
.key-k { background: linear-gradient(135deg, #FF8C00, #FF4500); }
.key-l { background: linear-gradient(135deg, #32CD32, #228B22); }
.key-ö { background: linear-gradient(135deg, #FFD700, #FFA500); }

.blink {
    animation: blink-effect 0.3s ease-out;
}

@keyframes blink-effect {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 20px rgba(255,255,255,0.8);
    }
}

.instructions {
    margin-top: 30px;
    text-align: center;
    background: rgba(255,255,255,0.9);
    padding: 20px;
    border-radius: 10px;
    max-width: 600px;
    border: 1px solid rgba(0,0,0,0.1);
}

.instructions h3 {
    margin-top: 0;
    color: #FF8C00;
}

.typewriter-link {
    margin-top: 30px;
    text-align: center;
    padding: 20px;
}

.typewriter-link a {
    color: #2C3C7B;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: 500;
    transition: color 0.3s ease;
}

.typewriter-link a:hover {
    color: #FF8C00;
    text-decoration: underline;
}

.note-display {
    margin-top: 20px;
    font-size: 1.5em;
    font-weight: bold;
    color: #FF8C00;
    min-height: 30px;
}