.theme-mkf6-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: #333;
    line-height: 1.6;
}

.theme-mkf6-package-title {
    font-size: 28px;
    font-weight: bold;
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 3px solid #f39c12;
    padding-bottom: 10px;
}

.theme-mkf6-thumbnail-image,
.theme-mkf6-package-image {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 30px auto;
    border: 5px solid #ecf0f1;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.theme-mkf6-video-button {
    display: inline-block;
    padding: 18px 40px;
    font-size: 20px;
    font-weight: bold;
    color: #ffffff;
    background-color: #2980b9;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    text-align: center;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: block;
    margin: 30px auto;
}

.theme-mkf6-video-button:hover {
    background-color: #3498db;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
    transform: translateY(-3px);
}

.theme-mkf6-video-button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.theme-mkf6-video-button::before {
    content: '▶︎';
    display: inline-block;
    margin-right: 10px;
    font-size: 1.2em;
    vertical-align: middle;
}