.header-img {
    width: 100%;
    height: auto;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #1a202c;
    background-image: url('#######');
    background-size: cover;
    background-attachment: fixed;
    color: #e5e7eb;
}
.error {
    color: red;
}
.custom-shadow {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.main-container {
    background-color: rgba(31, 41, 55, 0.85);
    border: 1px solid #4b5563;
    padding: 1.5rem;
    border-radius: 0.5rem;
}