html, body {
    font-family: 'Source Sans Pro', sans-serif;
    font-size: 16px;
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

body {
    display: grid;
    min-height: 100vh;
    grid-template-rows: auto 1fr auto;
}

header {
    font-family: 'Krona One', sans-serif;
    font-size: 2rem;
    padding: 0.75rem 2rem;
}

main {
    border-top: solid 0.15rem #ccc;
    border-bottom: solid 0.15rem #ccc;
    padding: 2rem 0;
}

footer {
    font-size: 0.75rem;
    padding: 0.75rem 2rem;
}


#chatbox {
    display: grid;
    grid-template-rows: 1fr auto;
    margin: 0 auto;
    width: 100%;
    max-width: 640px;
    height: calc(100vh - 11.5rem);
}

#chat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    overflow-y: auto;
    padding: 1rem 0.25rem;
}
#chat .bot {
    background: #eee;
    border-radius: 0 1.5rem 1.5rem 0;
    padding: 0.5rem 1.25rem 0.5rem 0.75rem;
}
#chat .human {
    border: solid 0.1rem #ddd;
    border-radius: 1.5rem 0 0 1.5rem;
    align-self: end;
    padding: 0.5rem 0.75rem 0.5rem 1.25rem;
}
#chat .bot + .bot, #chat .human + .human {
    margin-top: 0.25rem;
}
#chat .bot + .human, #chat .human + .bot {
    margin-top: 1rem;
}



#input {
    background-color: #eee;
    padding: 0.75rem;
}
#input textarea {
    width: 100%;
    margin: 0;
    resize: none;
}