body {
    height: 100%;
    max-width: 620px;
    margin: 20px auto;
    font-family: 'Heebo', sans-serif;
    line-height: 27px;
    font-size: 25px;
    box-sizing: border-box;
    background-color: #f5f5f5;
}

main {
    background-color: white;
    padding-bottom: 50px;
    box-shadow: 0 0 20px -5px #999;
}

input {
    font-size: inherit;
    font-family: inherit;
    box-sizing: inherit;
}

.container {
    display: flex;
    flex-direction: column;
    text-align: center;
}

.inner {
    padding: 30px;
}

.logo {
    max-width: 70%;
    margin: 30px 0 50px;
}

.welcome-title {
    margin: 0;
    line-height: 45px;
    direction: ltr;
}

.instructions {
    margin: 25px 0 20px;
    padding-bottom: 50px;
    border-bottom: solid 2px #b8ece0;
}

.id-verification-form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.id-verification-form.error .id-input {
    border: solid 3px;
    border-color: tomato;
}

.id-verification-form.error .error-msg {
    visibility: visible;
}

.id-input {
    max-width: 300px;
    border: solid 1px;
    padding: 10px;
    margin-bottom: 30px;
    font-size: 40px;
    font-weight: bold;
    letter-spacing: 5px;
    border-radius: 10px;
    border: solid 3px black;
    text-align: center;
}

input[type="submit"] {
    width: 100%;
    max-width: 80%;
    color: white;
    background-color: #000;
    border-radius: 20px;
    border: none;
    margin-top: 20px;
    padding: 20px 0;
    cursor: pointer;
    font-weight: bold;
}

.error-msg {
    visibility: hidden;
    color: tomato;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 5px;
}

@media (max-width: 620px) {
    body {
        margin: 0;
    }

    main {
        height: 100%;
    }
}