/* Large */
ul {
    font-family: Arial;
    line-height: 1.4rem;
    font-size: 1.1rem;
}
.content{
    max-width: 890px;
    margin: 0px auto;
}
ul.ueberschrift {
    display: flex;
    flex-flow: row wrap;
    justify-content: flex-start;
    list-style: none;
    font-size: 1rem;
    font-family: Verdana;
    font-weight: 300;
    max-width: 123px;
}

div.navigation {
    display: flex;
    flex-flow: row wrap;
    justify-content: flex-start;
    list-style: none;
    font-size: 1rem;
    font-family: Verdana;
    font-weight: 300;
    max-width: 900px;
    margin: 0px auto;
}

ul.navigation2 {
    width: 89%;
    margin-top: 2rem;
    border: 2px solid gray;
    padding: 1rem;
    text-align: center;
}

#demo, #demo2, #demo3, #demo4 {
    margin-top: 0.5rem;
    padding: 1rem 0rem;
    padding: 12px;
    border: 1px solid #ebebeb;
    background-color: #e7f5ff;
}

.container {
    width: auto;
    margin-right: 0.5rem;
    margin-top: 1rem;
}

button {
    line-height: 2rem;
    min-height: 3rem;
    padding-left: 10px;
    padding-right: 10px;
    font-family: Arial;
    font-size: 1.1rem;
}

li {
    line-height: 2rem;
    min-height: 3rem;
    padding-left: 10px;
    padding-right: 10px;
}

span {
    background-color: ; /* Hier war ein Fehler: Du hattest nur '#' */
    padding: 3px 0px;
    margin-top: 1rem;
    color: green;
    text-align: center;
}

label {
    padding-right: 3px;
    padding-left: 8px;
    font-family: Verdana;
    font-weight: 300;
    font-size: 0.9rem;
}

input {
    max-width: 5rem;
}

/* Medium screens */
@media all and (max-width: 800px) {
    ul.navigation {
        justify-content: space-around;
        list-style: none;
    }
}

/* Small screens */
@media all and (max-width: 500px) {
    ul.navigation {
        flex-direction: column;
        list-style: none;
    }
}

.kaesten {
    display: flex;
    flex-flow: row wrap;
}

.btn-outline-primary {
    color: #647499;
    padding: 4px 18px;
}

.btn-outline-primary:hover {
    color: #a1a1a1;
    background-color: #ebebeb;
    border-color: #647499;
}

.btn-check:focus+.btn-outline-primary,
.btn-outline-primary:focus {
    box-shadow: 0 0 0 .15rem rgba(13,110,253,.5);
}

.btn-check:active+.btn-outline-primary,
.btn-check:checked+.btn-outline-primary,
.btn-outline-primary.active,
.btn-outline-primary.dropdown-toggle.show,
.btn-outline-primary:active {
    color: #bebebe;
    background-color: #bebebe;
    border-color: #0d6efd;
}

.btn-check:active+.btn-outline-primary:focus,
.btn-check:checked+.btn-outline-primary:focus,
.btn-outline-primary.active:focus,
.btn-outline-primary.dropdown-toggle.show:focus,
.btn-outline-primary:active:focus {
    box-shadow: 0 0 0 .25rem rgba(13,110,253,.5);
}

.btn-outline-primary.disabled,
.btn-outline-primary:disabled {
    color: #bebebe;
    background-color: transparent;
}