#courses .nav-tabs {
    border-bottom: 4px solid var(--secondary-color);
}

.nav-tabs .nav-link {
    border: 1px solid transparent;
    color: var(--text-secondary-color);
    font-weight: bold;
    padding: 10px 15px;
    border-radius: 1rem 1rem 0 0;
    transition: background-color 0.3s, color 0.3s;
}

.nav-tabs .nav-link.active {
    color: var(--text-primary-color);
    background-color: var( --background-color);
    border-color: var(--primary-color) var(--primary-color) var(--background-color);
}

.nav-tabs .nav-link:hover {
    background-color: var(--secondary-background-color);
    color: var(--primary-color);
}

/* Tab Content */
.tab-content {
    border-radius: 1rem;
}

/* List Styling */
.list-group {
    margin: 0;
    padding: 0;
    list-style: none;
}

.list-group-section {
    color: #5f6060;
    margin-top: 15px;
    margin-bottom: 10px;
    text-transform: capitalize;
}

.list-group-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    color: var(--primary-color);
    border: 2px solid var(--secondary-color) !important;
    border-radius: 1.5rem !important;
    margin-bottom: 6px;
    background-color: var(--primary-background-color);
}

.list-group-item:hover {
    background-color: var(--secondary-background-color);
    box-shadow: 0 2px 5px var(--secondary-color);
}

.list-group-item .course-info {
    display: flex;
    align-items: center;
}

.list-group-item .course-info .title {
    color: var(--text-primary-color);
    text-decoration: none;
}

.list-group-item .course-info .title {
    cursor: pointer;
    text-decoration: none;
}

.list-group-item .course-info .title::after {
    content: "";
    display: block;
    width: 0px;
    height: 2px;
    bottom: 0.37em;
    background-color: var(--primary-color);
    transition: all 0.25s cubic-bezier(0.645,0.045,0.355,1);
    opacity: 0.5;
}

.list-group-item .course-info .title:hover::after {
    width: 100%;
}

.list-group-item .course-info .github {
    text-decoration: none;
    color: var(--primary-color);
    font-size: large;
    margin-left: 15px;
}

.list-group-item .course-info .github:hover::after {
    content: attr(title);
    position: absolute;
    background-color: var(--background-color);
    color: var(--text-primary-color);
    white-space: nowrap;
    padding: 5px;
    border-radius: 7px;
    font-size: 12px;
    margin-left: 6px;
    z-index: 9999;
}

.list-group-item .grade {
    color: white;
    padding: 3px 12px;
}


/* Responsive Design */
@media (max-width: 768px) {
    .list-group-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .badge {
        margin-top: 5px;
    }
}