#join-input {
    text-align: center;
}

.document {
    width: 80%;
    box-sizing: border-box;
}

span.line {
    display: inline-block;
}

.btn-secondary,
.btn-secondary:hover,
.btn-secondary:focus {
    color: #333;
    text-shadow: none;
}

body {
    text-shadow: 0 .05rem .1rem rgba(0, 0, 0, .5);
    box-shadow: inset 0 0 5rem rgba(0, 0, 0, .5);
    justify-content: center;
}

.cover-container {
    max-width: 42em;
}

::-webkit-input-placeholder {
    text-align: center;
}

::-moz-placeholder {
    text-align: center;
}

:-ms-input-placeholder {
    text-align: center;
}