*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

main {
    display: flex;
    height: 100vh;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5vh;
}
.button {
    width: 80px;
}

.buttonred {
    background-color: red;
}

.buttonyellow {
    background-color: yellow;
    color: black;
}

.buttongreen {
    background-color: green;
    color: white;
}

.buttonaut{
    background: linear-gradient(to right, red, yellow, greenyellow); /* Define um gradiente linear com as três cores */
}