* {
    margin:0; 
    padding:0;
    box-sizing: border-box;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}
.topic-container {
    display: flex;
    flex-direction: column;
    margin: 2% 0 ;
}
.topic-container  > .drop-topic {
    padding: .5% 0 ;
    padding-left: 2%;
    border: 1px solid black;
    display: flex;
}
.resource {
    border: 1px solid black;
}
.sub-topics-container > .drop-topic{
    border: none;
    background-color: blue;
}
.topic-container > .sub-topics-container,
.topic-container ul.sub-resources-container
 {
    margin-top: 1%;
    margin-left: 5%;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    display: flex;    
    align-items: stretch;
    list-style: none;
    text-decoration: none;
    gap: 1%;
}
ul.sub-resources-container > li{
    /* margin-top: 1%; */
    display: inline;
    list-style: none;
    flex-direction: column;
}
a.resource{
    display: flex;
    display: inline-flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
}
a.resource:visited{
    color: blue;
}
.drop-topic:active,.drop-topic:focus{
    box-shadow: 2px 0 4px 3px blue;

}
.resource:active,.resource:focus{
    box-shadow: 2px 2px 8px 6px lightseagreen;
}

.animate{
    position: relative;
    box-shadow: 0 0 3px 3px orange;
    z-index: 1;
    transform: scale(1.3);
    transform: all 1000ms;
}
.hide {
    display: none !important;
}
.show {
    display: inline-block;
}

.topic-container>.drop-topic>img {
    max-height: 50px;
    margin-left: 2.5%;
}
.resource>img {    
    /* margin-top: 1%; */
    margin-left: 1.26%;
    max-height: 50px;
}
@media screen and (max-width:720px){
    .topic-container>.sub-topics-container,
    .topic-container ul.sub-resources-container {
        margin-top: 4%;
    }

}
@media screen and (max-width:672px){
    
    .topic-container>.sub-topics-container,
    .topic-container ul.sub-resources-container {
        margin: 2.5% 0;
        padding-top: 2%;
    }
    .resource>img {
        max-width: 50px;
    }
}