body {
    margin: 0;
    overflow: hidden;
    background-color: #00b140;
}

#container {
    width: 100vw;
    height: 100vh;
    position: relative;
}

#controls {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.speed-button {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background-color: white;
    color: #00b140;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, background-color 0.2s;
    position: relative;
}
.speed-button:hover {
    transform: scale(1.1);
}

.speed-button::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 3px;
    background-color: white;
    top: 50%;
    transform: translateY(-50%);
    z-index: -1;
}

.speed-button:last-child::after {
    display: none;
}

#controls .speed-button:not(:last-child)::after {
    width: 20px;
    height: 2px;
    background-color: white;
    right: -15px;
}