body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    color: #333;
    font-size: 16px;
}

h1 {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    margin: 0;
    height: 60px;
    background: #f1f1f1;
}

h1 a {
    font-size: 12px;
    text-decoration: none;
    color: #666;
}

iframe {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: calc(100% - 60px);
    border: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    z-index: 999999;
    background-color: #f0f0f0;
}