body{

    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* background-color: rebeccapurple; */
    /* background-image: url(https://picsum.photos/1920/1080); */
    background-image: url(https://images.unsplash.com/photo-1430417934865-589b63ad5c00?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1476&q=80);
    height: 100vh;
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
    

}

header{

    position: sticky;
    top: 0;
    z-index: 1;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.404);
    display: flex;

}

.container{

    width: 1280px;
    margin: auto;

}

.nav_checkbox{

    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 10px 0px;

}

.logo{

    text-decoration: none;
    color: white;
    padding-left: 10px;

}

.tab-nav{

    outline: none;
    display: none;

}

.label{

    display: none;
    color: white;

}

.burger{

    width: 35px;
    height: 5px;
    background-color: white;
    margin-top: 5px;

}

.content_nav{

    grid-column: 3;
    list-style: none;
    margin: 0;
    padding: 0;

}

.content_nav li{

    display: inline-block;
    padding-right: 10px;

}

.content_nav li a{

    text-decoration: none;
    color: white;
    position: relative;

}

.content_nav li a::after{

    content: '';
    display: block;
    height: 2px;
    background-color: white;
    position: absolute;
    left: 0;
    right: 0;
    transform-origin: right;
    transform: scale(0, 1);
    transition: transform ease-in-out 0.5s;

}

.content_nav li a:hover::after{

    transform: scale(1, 1);

}

.main-content-section{

    /* height: 120vh; */
    /* background-image: url(//unsplash.it/g/800/500/?blur); */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    display: block;
    
    justify-content: center;
    
   
    /* background-color: aqua; */
    /* height: 100%; */
    /* outline: red 2px solid; */
    height: 30rem;
    align-content: center;
    text-align: center;

    

}


.main-h1{
/* display: flexbox; */
align-self: center;
font-size: calc(4vw + 2rem);
text-shadow: 2px 2px 1px .5;
background-color: rgba(238, 238, 238, 0.678);
padding: 2rem;
/* outline: red 2px solid;   */
margin-top: 20vh;

}

.main-content{
    display: block;
    /* outline: red 2px solid; */
    padding: 2rem;
    margin-top: -4rem;
    font-size: calc(1vw + .5rem);
    
}


@media screen and (max-width: 1280px){

    .container{

        width: 100%;

    }

}

@media screen and (max-width: 770px){

    .label{

        display: grid;
        cursor: pointer;
        grid-column: 3;
        padding-right: 10px;

    }

    .content_nav{

        display: grid;
        grid-template-columns: 1fr;
        grid-column: 1/4;
        text-align: center;
        max-height: 0;
        overflow: hidden;
        transition: all ease-in-out 0.6s;

    }

    .nav_checkbox input:checked ~ .content_nav{

        max-height: 500px;

    }

    .content_nav li{

        padding: 15px 0px;

    }


}