body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background-color: #0d1117;
    color: #c9d1d9;
    background-image: url('../images/background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.header {
    background-color: rgba(22, 27, 34, 0.95);
    padding: 20px 0;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border-bottom: 2px solid #58a6ff;
}

.header h1 {
    margin: 0;
    font-size: 2em;
    color: #58a6ff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.header nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    margin: 20px 0 0 0;
}

.header nav ul li {
    margin: 0 15px;
}

.header nav ul li a {
    color: #c9d1d9;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    transition: color 0.3s ease;
    position: relative;
    cursor: pointer;
}

.header nav ul li a:hover {
    color: #58a6ff;
}

.header nav ul li a::after {
    content: '';
    display: block;
    width: 0;
    height: 3px;
    background: #58a6ff;
    transition: width .3s;
}

.header nav ul li a:hover::after {
    width: 100%;
    transition: width .3s;
}

.content {
    flex: 1;
}

.content-section {
    background-color: rgba(22, 27, 34, 0.85);
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.content-section.hidden {
    display: none;
}

.search-input {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: none;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1em;
    background-color: #21262d;
    color: #c9d1d9;
}

.search-input::placeholder {
    color: #8b949e;
}

.item-list {
    list-style: none;
    padding: 0;
}

.item-list li {
    padding: 10px;
    margin: 5px 0;
    background-color: #21262d;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.item-list li:hover {
    background-color: #30363d;
    transform: translateY(-5px);
}

.footer {
    background-color: rgba(22, 27, 34, 0.95);
    color: #c9d1d9;
    text-align: center;
    padding: 20px 0;
    box-sizing: border-box;
    border-top: 2px solid #58a6ff;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #21262d;
    color: #c9d1d9;
    padding: 100px;
    max-width: 80%;
    border-radius: 8px;
    position: relative;
    text-align: center;
}

.modal-content .close {
    position: absolute;
    top: 10px;
    right: 10px;
    color: #c9d1d9;
    cursor: pointer;
    font-size: 1.5em;
}

.modal-content h2 {
    margin-top: 0;
}

.modal-content p {
    margin-bottom: 50%;
}

.modal-content a {
    display: block;
    background-color: #58a6ff;
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    margin-top: 10px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.modal-content a:hover {
    background-color: #3d8af7;
}

#videos {
    padding: 20px;
    text-align: center;
}

.video-playlists {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.playlist {
    width: 200px;
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow: hidden;
    transition: transform 0.3s;
    text-decoration: none;
}

.playlist a,
.playlist a:hover {
    text-decoration: none;
}

.playlist:hover {
    transform: scale(1.05);
    text-decoration: none;
}

.playlist img {
    width: 100%;
    height: auto;
}

.playlist-description {
    padding: 10px;
    background-color: #fff;
}

.playlist-description h3 {
    margin: 0;
    font-size: 18px;
    color: #333;
}

.playlist-description p {
    margin: 5px 0 0;
    font-size: 14px;
    color: #666;
}