mystyle.css

body {
    width: 98.7vw;
    margin: 0px;
    font-family:  sans-serif;
    color:white;
    background-color: #131720;
}
.col {
    width: 25%;
    float: left;
    height: 270px;
}
.container {
    position: relative;
    width: 100%;
    height:100%;
    margin-bottom: 0%;
    cursor: pointer;
}
table {
    font-family: arial, sans-serif;
    color: white;
    border-collapse: collapse;
    width: 60%;
    margin-left: auto;
    margin-right: auto;
}
td, th {
    border: 1px solid #dddddd;
    text-align: centre;
    padding: 2vh;
}
.row1 {
    padding: 0.1vh;
    width:100%;
    background-color: black;
    z-index: 2;
}
button {
    cursor: pointer;
    border-radius: 5px;
}
.dropbtn1 {
    cursor: pointer;
    border: 2px solid #555;
    border-radius: 50%;
}
.dropdown1 {
    position: relative;
    margin-right: 3%;
    z-index: 1;
    display: inline-block;
}
.dropdown-content1 {
    display: none;
    position: absolute;
    right:0;
    color: black;
    background-color: #f1f1f1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}
.dropdown-content1 a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}
.dropdown-content1 a:hover {background-color: #ddd}
.dropdown1:hover .dropdown-content1 {
    display: block;
}
.dropdown1:hover >.dropbtn1{
    border-color: #2980B9;
}