body {
    font-family: Tahoma, Arial;
    background: #245EDB;
    color: #000;
    margin: 0;
}
.title-bar {
    background: linear-gradient(#316ac5, #003399);
    color: #fff;
    padding: 10px;
    font-size: 18px;
}
.main {
    display: flex;
}
.sidebar {
    width: 220px;
    background: #E3EBFF;
    border-right: 2px solid #7393E5;
    padding: 10px;
}
.side-title {
    font-weight: bold;
    margin-bottom: 10px;
}
.sidebar a {
    color: #0033cc;
    text-decoration: none;
    display: block;
    margin-bottom: 5px;
}
.content {
    flex: 1;
    background: #FFFFFF;
    padding: 12px;
}
.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
    margin-top: 12px;
}
.icon {
    width: 150px;
    text-align: center;
    font-size: 15px;
}
.icon img {
    width: 100px;
    height: 100px;
    margin-bottom: 5px;
}
.viewer {
    background: #fff;
    padding: 15px;
    border: 2px solid #7393E5;
    margin: 20px;
}
.viewer-img, .viewer-video {
    width: 100%;
    max-width: 700px;
    border-radius: 6px;
}