.yt-thumbnail-downloader {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.yt-thumbnail-downloader h2 {
    color: #ff0000;
    text-align: center;
    margin-bottom: 20px;
}

.yt-input-group {
    display: flex;
    margin-bottom: 20px;
}

.yt-input-group input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
    font-size: 16px;
}

.yt-input-group button {
    padding: 12px 20px;
    background: #ff0000;
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.yt-input-group button:hover {
    background: #cc0000;
}

.yt-thumbnail-options h3 {
    color: #333;
    margin-bottom: 15px;
    text-align: center;
}

.yt-thumbnail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.yt-thumbnail-item {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s;
}

.yt-thumbnail-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.yt-thumbnail-item img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 10px;
}

.yt-download-btn {
    display: inline-block;
    padding: 8px 15px;
    background: #ff0000;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.3s;
}

.yt-download-btn:hover {
    background: #cc0000;
}

.fas {
    margin-right: 8px;
}

@media (max-width: 600px) {
    .yt-input-group {
        flex-direction: column;
    }
    
    .yt-input-group input {
        border-radius: 4px;
        margin-bottom: 10px;
    }
    
    .yt-input-group button {
        border-radius: 4px;
    }
    
    .yt-thumbnail-grid {
        grid-template-columns: 1fr;
    }
}