:root {
    --max-width: 750px;
    --background-1: #ffffff;
    --background-2: #e9e9e9;
    --background-3: #555555;
    --text-color-1: #000000;
    --text-color-2: #555555;
    --nav-button-size: 70px;
    --nav-button-radius: 10px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

* {
    margin: 0;
    padding: 0;
}

main {
    margin: 1em auto;
    max-width: var(--max-width);
}

.message .metadata .name {
    font-size: 120%;
}

.message .metadata .date {
    color: var(--text-color-2);
}

.message .text {
    margin-top: 1em;
}

nav #top-left {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-button-size);
    height: var(--nav-button-size);
    background-color: var(--background-2);
    color: black;
    font-size: calc(var(--nav-button-size) - 10px);
    border-bottom-right-radius: var(--nav-button-radius);
}

nav #bottom-left {
    position: fixed;
    top: calc(100vh - var(--nav-button-size));
    left: 0;
    width: var(--nav-button-size);
    height: var(--nav-button-size);
    background-color: var(--background-2);
    color: black;
    font-size: calc(var(--nav-button-size) - 10px);
    border-top-right-radius: var(--nav-button-radius);
}

nav a {
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

nav a i {
    display: block;
}