main {
    display: grid;
    grid-template-rows: 1fr auto;
}

.upper {
    display: flex;
    justify-content: center;
    align-items: center;
}

.upper h1 {
    text-align: center;
}

button {
    text-decoration: none;
    font-size: 2.5rem;
    padding: 0.5rem 2rem;
    border-radius: 5rem;
    background-color: var(--color-green);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    transition: color 0.1s;
}

button:hover {
    color: var(--color-yellow);
}