body {
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    overflow: hidden;
    position: relative;
    height: 100vh;
}

.container {
    width: 100%;
    height: 100%;
    position: relative;
}

#car {
    position: absolute;
    width: 50px;
    height: 50px;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    transition: top 0.2s, left 0.2s;
}

.controls {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    text-align: center;
}

.row {
    display: flex;
    justify-content: center;
    margin: 5px 0;
}

button {
    width: 60px;
    height: 60px;
    margin: 5px;
    font-size: 24px;
    cursor: pointer;
    border-radius: 8px;
    border: 1px solid #aaa;
    background-color: white;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.2s;
}

button:hover {
    background-color: #ddd;
}