* {
    margin: 0;
    box-sizing: border-box;
}

body {
    background-color: seagreen;
}

.container {
    background-color: rgba(47, 79, 79, 0.74);
    border-radius: 15px;
    color: whitesmoke;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 45%;
    padding: 2%;
}

.header {
    text-transform: uppercase;
    text-align: center;
    padding-bottom: 2%;
}

.queue {
    border: 1px dashed black;
    padding: 2% 0;
}

.registration {
    padding-top: 2%;
}

.registration-form input {
    padding: 3px;
}

.button {
    border: 1px dashed black;
    cursor: pointer;
}

.registration-button {
    margin-top: 1%;
    display: block;
}

.remove-button {
    margin-top: 2%;
}

.error-message {
    color: indianred;
    font-weight: 700;
}