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

body {
    font-family: sans-serif;
}

.h1 {
    font-size: 40px;
    text-decoration: underline;
}

button {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    font-size: 30px;
    cursor: pointer;
    background-color: black;
    color: white;
    border: none;
}

.main {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    justify-content: space-evenly;
}

.main2 {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.row {
    display: flex;
    gap: 20px;
}

@media (max-width: 768px) {
    .main {
        gap: 10px;
    }

    button {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .row {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .main {
        gap: 5px;
    }

    button {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
}