body::before {
    content: "■■■■■ Security Warning ■■■■■\A This system is the property of 𝐅𝐁𝐈. Any unauthorized use or misuse constitutes a federal crime.";
    white-space: pre-wrap;
    display: block;
    background-color: #d32f2f;
    color: white;
    text-align: center;
    padding: 14px;
    font-weight: bold;
    font-size: 16px;
    width: 100%;
    box-sizing: border-box;
    letter-spacing: 1px;
    line-height: 1.5;
}