body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #fafafa;
}

header {
    text-align: center;
    padding: 20px 0;
    color: white;
    background: #4f2683;
    border-bottom: 1px solid #ddd;
    margin-bottom: 10px;
}

h1 {
    margin: 0;
    font-size: 32px;
}

section {
    padding: 20px;
    margin-bottom: 10px;
    background: white;
    border-bottom: 1px solid #eee;
}

#load-section h2,
#filter-section h2 {
    margin-top: 0;
    font-size: 25px;
    color: #333;
}

.filter-row {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.filter-row label {
    font-size: 14px;
}

.filter-row select {
    margin-left: 6px;
    padding: 4px;
}

#content-container {
    display: flex;
    height: 50vh;
    padding: 10px 20px;
    gap: 20px;
}

#course-list-container {
    width: 35%;
    background: white;
    border: 1px solid #ddd;
    overflow-y: scroll;
    padding: 10px;
}

#courseList {
    list-style: none;
    padding: 0;
    margin: 0;
}

#courseList li {
    padding: 10px;
    margin-bottom: 8px;
    background: #f5f5f5;
    border: 3px solid #201436;
    border-radius: 7px;
    cursor: pointer;
}

#courseList li:hover {
    background: #bababaaa;
}

#details-section {
    flex-grow: 1;
    background: white;
    border: 3px solid #201436;
    border-radius: 10px;
    padding: 20px;
    overflow-y: auto;
}

#detailsBox h3 {
    margin-top: 0;
    font-size: 22px;
}

.error {
    color: red;
    margin-top: 8px;
}