* { box-sizing: border-box; }

body {
    font-family: "Fira Sans";
}

.page {
    position: absolute;
    top: 0;
    left: 0;
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    grid-template-rows: 50px auto 50px;
    width: 100%;
    height: 100%;
}

.header {
    border: 1px solid black;
    grid-column: 1 / 5;
    grid-row: 1;
}

.footer {
    border: 1px solid black;
    grid-column: 1 / 5;
    grid-row: 3;
}

.contents {
    border: 1px solid black;
    grid-column: 1 / 4;
    grid-row: 2;
}

.chat {
    border: 1px solid black;
    grid-column: 4 / 5;
    grid-row: 2;
    padding: 1em;
    display: flex;
    flex-flow: column;
}

.chatbox-container {
    width: 100%;
    align-self: flex-end;
}

#chatbox {
    width: 100%;
}

.messages {
    overflow: auto;
    margin-bottom: auto;
}

.author {
    font-weight: bold;
    color: #900;
}

.msg {
    padding: 0.2em;
}