body {
    background: #111;
    margin: 0;
    font-family: arial;
    display: flex;
    flex-direction: column;
    align-content: center;
    align-items: center;
}

h1 {
    color: #fff;
    margin: 0.2em;
    font-size: 1.5em;
}

h2 {
    color: #fff;
    margin: 0em;
    font-size: 1.5em;
}

hr {
    width: 100%;
}

#concerts {
    width: 100%;
    max-width: 35em;
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1em;
    padding: 1em;
}

form label {
    font-size: 1em;
    color: #fff;
}

form input {
    background-color: #222;
    border: 0;
    padding: 1em;
    color: #fff;
}