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

html,body{
    height: 100%;
    width: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

main{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    background: #191919;
}

#box{
    width: 200px;
    height: 200px;
    background-color: lightgray;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    border: 2px solid gray;
    border-radius: 10px;
    cursor: pointer;
}

button{
    padding: 10px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: teal;
    color: white;
    cursor: pointer;
}

button:hover{
    background-color: darkcyan;
}

button:active{
    transform: scale(0.95);
}