body {
    margin: 0;
    background-color: #f0f8ff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
#app {
    text-align: center;
}
#letter-display {
    font-size: 200px;
    margin-bottom: 50px;
    color: #333;
}
#buttons-container {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.button {
    font-size: 80px;
    padding: 20px;
    background-color: #add8e6;
    border-radius: 10px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.3s;
}
.button:hover {
    background-color: #87ceeb;
}
.animate {
    animation: bounce 1s;
}
@keyframes bounce {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}