body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

header {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 20px;
    width: 100%;
    position: relative;
    z-index: 10;
}

.logo {
    width: 500px;
    height: auto;
}

/* Rainbow Background */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(to bottom, 
        #E40303 16.66%,  /* Red */
        #FF8C00 33.33%,  /* Orange */
        #FFED00 50%,     /* Yellow */
        #008026 66.66%,  /* Green */
        #004DFF 83.33%,  /* Blue */
        #750787 100%     /* Purple */
    );
}

main {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.8);
    width: 80%;
    margin: 20px auto;
    border-radius: 10px;
}

form {
    display: inline-block;
    text-align: left;
    max-width: 400px;
    width: 100%;
}

form input, form textarea {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

button {
    background-color: #333;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
}

footer {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px;
    width: 100%;
    position: fixed;
    bottom: 0;
}