error.css

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

body{
    font-family: 'Montserrat', sans-serif;
}

.navbar{
    display: flex;
    align-items: center;
    padding: 20px;
}

nav{
    flex: 1;
    text-align: right;
    padding-right: 40px;
}

nav ul{
    display: inline-block;
    list-style-type: none;
}

nav ul li{
    display: inline-block;
    margin-left: 20px;
}

a{
    text-decoration: none;
    color: rgb(255, 255, 255);
}

a:hover{
    text-decoration: none;
    color: rgb(255, 255, 255);
    opacity: 0.3;
}

#bold{
    border: 2px solid white;
    cursor: default;
}

#bold:hover{
    border: 2px solid white;
    text-decoration: none;
    color: rgb(255, 255, 255);
    opacity: 1;
    cursor: default;
}

.headicon{
    width: 30px; 
    align-items: right; 
    margin: 15px;
}

.headicon:hover{
    opacity: 0.3;
}

p{
    color: rgb(0, 0, 0);
}

.container{
    max-width: 1300px;
    margin: auto;
    padding-left: 35px;
    padding-right: 25px;
}

.row{
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-around;
}

.col-2{
    flex-basis: 50%;
    min-width: 300px;
}

.col-2 img{
    max-width: 100%;
    padding: 50px 0;
}

.col-2 h1{
    font-size: 50px;
    line-height: 60px;
    margin: 35px 0;
}

.header{
    background: rgb(15, 28, 34);
}

.header .row{
    margin-top: 70px;
}

/* product cards */

h1{
    text-align: center;
    margin: 100px;
}

.socials .socialbutton {
    display: block;
    height: 50px;
    width: 50px;
    margin: 0 5px;
    cursor: pointer;
    box-shadow: 0px 10px 10px rgba(0, 0, 0, 0.1);
    padding-left: 20px;
    padding-top: 15px;
}

.socialbutton{
    background-color: white;
}

.icontext{
    padding-left: 40px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.socialbutton:nth-child(1):hover {
    background: #1655df;
}

.socialbutton:nth-child(2):hover {
    background: #00acee;
}
.socialbutton:nth-child(3):hover {
    background: #8a3ab9;
}
.socialbutton:nth-child(4):hover {
    background: #ff0000;
}

#follow{
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
}

#useful{
    margin-top: 38px;
    margin-bottom: 30px;
    text-align: center; 
}

#last{
    margin-bottom: 50px;
    padding-bottom: 30px;
}

.item{
    text-decoration: none;
    list-style-type: none;
    list-style: none;
}

.row{
    columns: 400px 3;
}

.column{
    display: inline-block;
    width: 100%;
    background-color: rgb(253, 220, 158);
}

.footer-col1{
    margin-left: 70px;
}

.footer-col2{
    margin-left: 150px;
    margin-right: 100px;
    width: 500px;
}

#ecoe{
    padding: 20px;
    text-align: center;
}

#ecoetext{
    line-height: 25px;
    text-align: justify;
    margin-bottom: 50px;
}

.footer-col3{
    width: 300px;
    text-align: center;
    padding-left: 50px;
}

#copyright{
    background: black;
    color: white;
    font-size: 15px;
    height: 25px;
    padding: 5px;
    text-align: center;
}

.menu{
    width: 28px;
    margin-left: 20px;
    display: none;
}

/* media query for less than 800 screen size */

@media only screen and (max-width: 800px){
    nav ul{
        position: absolute;
        top: 70px;
        left:0;
        background: black;
        width: 100%;
        overflow: hidden;
        transition: max-height 0.5s;

    }

    .navbar nav{
        margin-top: 10px;
        padding-top: 10px;
    } 

    nav ul li{
        display: block;
        margin-right: 50px;
        margin-top: 10px;
        margin-bottom: 10px;
    }

    nav ul li a{
        color: white;
    }

    .menu{
        display: block;
        cursor: pointer;
    }

    #readimg{
        width: 80%;
    }

    .row .col-2{
        padding-left: 385px;
    }

    #note{
        width: 320px;
    }

    .row .col-2 h1{
        text-align: center;
    }

    .logo img{
        width: 80px;
        margin-left: -30px;
    }

    .row .col-2{
        margin-top: -25px;
    }

    .card{
        padding-bottom: 40px;
    }

}

/* media query for less than 600 screen size */

@media only screen and (max-width: 600px){
    .row{
        text-align: center;
    }

    .col-2, .col-5{
        flex-basis: 100%;
    }
}