body {
    margin: 0;
    font-family: Arial, sans-serif;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    height: 100vh;
    background: linear-gradient(45deg, #ff0000, #0000ff);
    color: #3b1111;
}

header {
    text-align: center;
    z-index: 100;
    position: inherit;
    background: #0000ff1f;
    padding: 20px;
    border-radius: 10px;
}

h1 {
    margin: 0;
    font-size: 2.5em;
}

p {
    margin: 0;
    font-size: 1.2em;
}

#3d-container {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}