/* Container for the game */
.ptt-step-wrapper {
    max-width: 100%;
    margin: 20px auto;
    padding: 15px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
    box-sizing: border-box;
}

/* The Piano Bed */
.ptt-piano-container {
    display: flex;
    justify-content: center;
    background: #222;
    padding: 10px 5px 20px 5px;
    border-radius: 8px;
    gap: 2px;
    margin: 20px 0;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* White Keys */
.ptt-key.white {
    flex: 1;
    min-width: 35px;
    max-width: 50px;
    height: 140px;
    background: white;
    border-radius: 0 0 5px 5px;
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 15px;
    font-weight: bold;
    color: #888;
    border: 1px solid #ddd;
    transition: transform 0.1s, background 0.1s;
}

/* Active State for all keys */
.ptt-key:active, .ptt-key.ptt-active {
    background: #2ecc71 !important;
    transform: translateY(4px);
    color: white;
}

/* Mobile Adjustments */
@media (max-width: 480px) {
    .ptt-key.white {
        height: 100px;
        min-width: 30px;
        font-size: 12px;
    }
    .ptt-step-wrapper h2 { font-size: 1.2rem; }
}