body{
    /*
    background-image: url("../img/cover1.jpg");
    background-image: url("../img/cover2.jpeg");
    background-image: url("../img/cover3.jpg");
    */
    background-color: rgba(0,0,0,0.4);
    background-image: url("../img/campus1.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    background-blend-mode: overlay;
    /*height: calc(100vh + 100vh + 60px);*/
    position: relative;
    display: flex;
    flex-direction: column;
    color: black;
    overflow: hidden;
}
main{
    display: flex;
    flex-direction: column;
    flex: 1;
}
#campus_title{
    display: flex;
    flex: 1;
    color: white;
    text-align: center;
    justify-content: center;
    align-items: center;
}
#campus_title h1{
    text-align: center;
    justify-content: center;
    align-items: center;
    font-family: "Times New Roman", Times, serif;
    font-size: 78px;
}
#campus_content{
    display: flex;
    flex-direction: column;
    transition: 0.5s;
}
.campus_section{
    background-color: rgba(0, 0, 0, 0.4);
    display: none;
    flex-direction: column;
}
.campus_section h1{
    color: white;
    text-align: center;
    font-family: "Times New Roman", Times, serif;
    font-size: 40px;
}
#campus_1{
    display: flex;
}
.filter_buttons{
    text-align: center;
    border-top: solid 1px white;
    padding: 20px;
    transition: 0.5s esae;
}
.filter_buttons button{
    background-color: transparent;
    color: white;
    border: none;
    font-size: 20px;
}
.filter_buttons button:hover{
    color: rgba(255, 185, 122, 0.99);
    text-decoration: underline rgba(255, 185, 122, 0.99);
}
.course_list{
    display: flex;
    flex-wrap: wrap;
    column-gap: 2em;
    row-gap: 2em;
    justify-content: center;
    list-style-type: none;
    color: white;
    padding:0;
}
.course_list li{
    font-weight: bold;
    padding: 15px;
    width: 200px;
    height: 80px;
    border-radius: 10px;
    border: 1px solid white;
    background-color: rgba(255, 255, 255, 0.1);
    position: relative;
}
.course_list li h4{
    display: inline-block;
    margin: 4px 1px 0;
    padding: 5px;
    font-weight: normal;
    position: absolute;
    left: 10px;
    bottom: 12px;
    border-radius: 5px;
}
.course_doing{
    border: 1px solid rgba(234, 174, 38, 1);
    background-color: rgba(234, 174, 38, 0.1);
    color: rgb(255, 190, 55);
}
.course_done{
    border: 1px solid rgb(110, 234, 38);
    background-color: rgba(110, 234, 38, 0.1);
    color: rgb(128, 255, 55);
}
.course_unsatisfactory{
    border: 1px solid rgb(228, 7, 7);
    background-color: rgba(228, 7, 7, 0.1);
    color: rgb(253, 60, 60);
}
.course_drop{
    border: 1px solid rgb(170, 169, 169);
    background-color: rgba(170, 169, 169, 0.1);
    color: rgb(220, 219, 219);
}
.hidden{
    display: none;
}