.dropdown-btn {
    background-color: #ff4d4d;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.dropdown-btn:hover {
    background-color: #ff3333;
}

.dropdown-btn:after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #ffffff;
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.dropdown-btn:hover:after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.course-dropdown {
    display: block;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    margin-top: 20px;
    background-color: #110101;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.course-dropdown.active {
    opacity: 1;
    visibility: visible;
    max-height: 1000px;
    transform: translateY(0);
}

.dropdown-content {
    padding: 24px;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) 0.1s;
}

.course-dropdown.active .dropdown-content {
    opacity: 1;
    transform: translateY(0);
}

.course-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.course-details h3 {
    color: #ff4d4d;
    margin-bottom: 15px;
    grid-column: 1 / -1;
}

.course-details h4 {
    color: #ff4d4d;
    margin: 0 0 15px;
    font-size: 1.1em;
}

.course-section {
    background: rgba(255, 77, 77, 0.1);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 77, 77, 0.2);
    opacity: 0;
    transform: translateY(10px);
    animation: fadeIn 0.4s ease-out forwards;
}

.course-section:nth-child(1) { animation-delay: 0.1s; }
.course-section:nth-child(2) { animation-delay: 0.2s; }
.course-section:nth-child(3) { animation-delay: 0.3s; }

.course-details ul {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
    columns: 2;
    column-gap: 20px;
    transition: all 0.3s ease-in-out;
}

.course-details ul li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    color: #ffffff;
    break-inside: avoid;
}

.course-details ul li:before {
    content: "•";
    color: #ff4d4d;
    position: absolute;
    left: 0;
}

/* Custom scrollbar for dropdown content */
.dropdown-content::-webkit-scrollbar {
    width: 8px;
}

.dropdown-content::-webkit-scrollbar-track {
    background: rgba(255, 77, 77, 0.1);
    border-radius: 4px;
}

.dropdown-content::-webkit-scrollbar-thumb {
    background: #ff4d4d;
    border-radius: 4px;
}

/* Animation */
.course-dropdown.active {
    display: block;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .course-details {
        grid-template-columns: 1fr;
    }
    
    .course-details ul {
        columns: 1;
    }
}