header {
    background-color:black ;
    color: #ffffff;
    padding: 20px;
    text-decoration: underline;
    text-decoration-color: rgb(0, 213, 238);
    text-align: center;
}
.collapsible {
    background-color: #000000;
    box-shadow: 0 0 30px rgba(0,0,0,0.1);
    color: rgb(0, 213, 238);
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: 1px rgba(255, 44, 85, 0.466) solid;
    text-align: left;
    outline: none;
    font-size: 15px;

}

.active, .collapsible:hover {
    background-color: #2d2b2b;
}

.content {
    padding: 0 18px;
    border-radius: 0px;
    background-color: rgb(0, 0, 0);
    max-height: 0;
    color: rgb(0, 213, 238);
    overflow: hidden;
    transition: max-height 0.2s ease-out;
    font-family: Arial, Helvetica, sans-serif
    ;
}