:root,
input,
button {
    font-family: sans-serif;
}

body {
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;

}

#form {
    background: rgba(0, 0, 0, 0.15);
    padding: 0.25rem;
    box-sizing: border-box;
    backdrop-filter: blur(10px);
    position: sticky;
    bottom: 0;
}

.inner-form {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

#input {
    border: none;
    padding: 0 1rem;
    border-radius: 0.3rem;
    margin: 0.25rem;
    height: 2rem;
    flex-grow: 1;
}

#input:focus {
    outline: none;
}

.inner-form>button {
    background: #333;
    border: none;
    padding: 0 1rem;
    margin: 0.25rem;
    height: 2rem;
    border-radius: 3px;
    outline: none;
    flex-grow: 1;
}

button, button a {
    color: #fff;
    text-decoration: none;
}

button a {
    width: 100%;
    height: 2rem;
    text-align: center;
    line-height:2rem;
    vertical-align: middle;
    display: inline-block;
}

#messages {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

#messages>li {
    padding: 0.5rem 1rem;
    white-space: pre-wrap;
}
#messages>li>li {
    margin: 0;
    line-height: 1em;
    height: 1em;
    padding-bottom: 0.1em; 
    overflow: hidden;
}


#messages>li>li>img {
    height: 1.1em;
}

#messages>li:nth-child(odd) {
    background: #efefef;
}