h1,h2,h3,p{
    margin: 0;
}
ul{
    padding: 0;
    margin: 0;
    list-style: none;
}
a{
    text-decoration: none;
}
button{
    border: none;
    cursor: pointer;
}
img{
    width: 100%;
    max-width: 100%;
    display: block;
    height: auto;
}