body {
    background-image: url("background.png");
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    min-height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.overlay {
    background: rgba(0, 0, 0, 0.8);
    padding: 2rem;
    border-radius: 1rem;
}

input {
    width: 100%;
    padding: 0.5rem;
    border-radius: 0.5rem;
    border: none;
}

.container {
    max-width: 600px;
    margin: auto;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1rem;

}

html,
body {
    height: 100%;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto;
}

footer {
    background: rgba(63, 63, 63, 0.8);
    flex-shrink: 0;
}
footer a, footer a:visited, footer a:active, footer a:focus {
                text-decoration: none !important;
            }