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



h1 {
    font-size: 54px;
    text-transform: uppercase;
    color: rgb(132, 161, 214);
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

:root{
    --winning-blocks:#2d414b;
}

/*main container*/
.container {
    padding: 40px;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: rgb(117, 38, 10);
}

/* play board*/
#board {
    width: 300px;
    display: flex;
    flex-wrap: wrap;
    margin-top: 40px;
}
/*inside content */
.div {
    height: 100px;
    width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 120px;
    border-right: 2px solid;
    border-bottom: 2px solid;
}
.div:nth-child(3n) {
    border-right: none;
}
.div:nth-child(6) ~ .div {
    border-bottom: none;
} 

/*button*/
#reset {
    padding: 10px 20px;
    border-radius: 10px;
    background-color: rgb(132, 161, 214);
    color:white;
    border-color: white;
    font-size: 18px;
    transition: 200ms transform;
    font-weight: 600;
}
button:hover {
    cursor: pointer;
    transform: translateY(-2px);
}

footer{
    color: white;
    margin-top: 120px;
    font-weight: 900;
}

/* responsiveness*/

@media screen and (max-width:500px){
    h1{
        font-size:2rem;
    }

    .div{
        height: 16vh;
        
        font-size: 3.5rem;
    }

    #reset{
        margin-top: 20px;
        font-size: 0.9rem;
    }    
}