html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: Arial, sans-serif;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

header {
    position: relative;
    margin: 20px auto 40px auto;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 20px;
    font-size: 1.5rem;
    border-radius: 5px;
    text-align: center;
    white-space: nowrap;
    width: fit-content;
}

#formContainer {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 40vw;
    gap: 2rem;
}

form {
    background: rgba(255, 255, 255, 0.9);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

form label,
form input,
form button,
.file-upload-button {
    display: block;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
    margin: 0.5rem 0;
}

button, 
.file-upload-button {
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.5rem;
}

button:hover, 
.file-upload-button:hover {
    background: #0056b3;
}

input[type="file"] {
    display: none;
    visibility: hidden;
}

input[type="text"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

@media (max-width: 1200px) {
    #formContainer {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center; 
        width: 100%;
        min-height: 100vh; 
    }

    form {
        width: 80%; 
        max-width: 400px; 
    }
}