style.css

body
{
    margin: auto 0;         /*to use full screen, normalizing css*/
    font-family: Arial;
}
.zone {
    /*padding:30px 50px;
    margin:40px 60px;*/
    cursor:pointer;
    /*display:inline-block;*/
    color:#FFF;
    font-size:2em;
    border-radius:4px;
    border:1px solid #bbb;
    transition: all 0.3s linear;
}

.zone:hover {
    -webkit-box-shadow:rgba(0,0,0,0.8) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
    -moz-box-shadow:rgba(0,0,0,0.8) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
    -o-box-shadow:rgba(0,0,0,0.8) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
    box-shadow:rgba(0,0,0,0.8) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
}



/*NAV*/

.sticky
{   
    position: fixed;
    top:0;
    width: 100%;

}

.main-nav
{
    display: flex;
    list-style: none;       /*to remove bullet points*/
    font-size: 0.7em;
    margin: 0;              /*to remove margin*/ 
}

@media only screen and (max-width: 600px)     /*so that every thing fixes in if our screen is small*/
                                              /*as soon as I pass 600px we restore our defaults*/
{
    .main-nav
    {
        font-size: 0.5px;
        padding: 0;
    }
}

li
{
    padding: 20px;          /*to add spaces between items*/
}

a
{
    color: #f5f5f6;         /*to add color*/
    text-decoration: none;  /*to remove underline*/
}

.push
{
    margin-left: auto;      /*element gets automatically pushed at end */
}

/*COVER*/

.container
{
    display: flex;      
    align-items: center;
    justify-content: center;
    height: 70vh;              /*view port height,for making things responsive when it comes to height*/
                                /*look at the view of the page, and make sure that there is always a percentage to container*/
                                /*cover will be 50% of the viewport*/
}

.cover
{
    width: 30rem;
}


/*GRID*/

.grid-wrapper
{
    display: grid;
    grid-gap: 20px;
    grid-template-columns: repeat(auto-fill,minmax(350px,1fr));
}

.box>img    /*all children of box that had images*/
{
    width: 100%;    /*fits in the box*/
}

.box
{
    background-color: #444;
    padding: 130px;        /* to make size of the image smaller*/
    margin: 20px;
}

.box:hover {
    -webkit-transform:rotate(-7deg);
    -moz-transform:rotate(-7deg);
    -o-transform:rotate(-7deg);
    transform:rotate(-7deg);
}



footer
{
    text-align: center;
    background-color: #444;
}



/*https://paulund.co.uk/how-to-create-shiny-css-buttons*/
/***********************************************************************
 *  Green Background
 **********************************************************************/
.green{
    background: #56B870; /* Old browsers */
    background: -moz-linear-gradient(top, #56B870 0%, #a5c956 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#56B870), color-stop(100%,#a5c956)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #56B870 0%,#a5c956 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #56B870 0%,#a5c956 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #56B870 0%,#a5c956 100%); /* IE10+ */
    background: linear-gradient(top, #56B870 0%,#a5c956 100%); /* W3C */
}

/***********************************************************************
 *  Red Background
 **********************************************************************/
.red{
    background: #C655BE; /* Old browsers */
    background: -moz-linear-gradient(top, #C655BE 0%, #cf0404 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#C655BE), color-stop(100%,#cf0404)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #C655BE 0%,#cf0404 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #C655BE 0%,#cf0404 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #C655BE 0%,#cf0404 100%); /* IE10+ */
    background: linear-gradient(top, #C655BE 0%,#cf0404 100%); /* W3C */
}

/***********************************************************************
 *  Yellow Background
 **********************************************************************/
.yellow{
    background: #F3AAAA; /* Old browsers */
    background: -moz-linear-gradient(top, #F3AAAA 0%, #febf04 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#F3AAAA), color-stop(100%,#febf04)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #F3AAAA 0%,#febf04 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #F3AAAA 0%,#febf04 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #F3AAAA 0%,#febf04 100%); /* IE10+ */
    background: linear-gradient(top, #F3AAAA 0%,#febf04 100%); /* W3C */
}

/***********************************************************************
 *  Blue Background
 **********************************************************************/
.blue{
    background: #7abcff; /* Old browsers */
    background: -moz-linear-gradient(top, #7abcff 0%, #60abf8 44%, #4096ee 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#7abcff), color-stop(44%,#60abf8), color-stop(100%,#4096ee)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* IE10+ */
    background: linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* W3C */
}