:root {
    --font-mono: "Courier New", monospace;
    --font-sans: system-ui, sans-serif;
    --color-black: #000;
    --color-white: #fff;
    --color-gray-200: #eee;
    --color-gray-500: #767676;
    --space-xs: .5rem;
    --space-sm: .75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;
    --space-xxxl: 4rem
}

* {
    box-sizing: border-box;
    margin: 0
}

body {
    font-family: var(--font-mono);
    line-height: 1.4;
    color: var(--color-black);
    background-color: var(--color-white)
}

main > div {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-xxl) var(--space-md)
}

img[src="/logo.svg"] {
    display: block;
    height: auto
}

h1 {
    font-size: 1.75rem;
    font-weight: 400;
    letter-spacing: .01em;
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-md)
}

p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--space-md)
}

p:last-child {
    margin-bottom: 0
}

header p {
    font-size: 1rem;
    max-width: 90%;
    margin-bottom: 0
}

header {
    margin-bottom: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs)
}

main {
    display: grid;
    grid-template-columns:1fr;
    gap: var(--space-lg)
}

footer {
    margin-top: var(--space-xxl);
    padding-top: var(--space-sm);
    color: var(--color-gray-500);
    font-size: .75rem;
    text-align: center
}

section {
    margin-bottom: var(--space-lg)
}

section:last-child {
    margin-bottom: 0
}

section > h2, section > h4 {
    margin-bottom: var(--space-xs);
    font-size: .875rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    font-weight: 400
}

nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm)
}

p a {
    color: var(--color-black);
    font-weight: 700;
    text-decoration: none
}

p a:hover {
    text-decoration: underline;
    text-underline-offset: .2em
}

nav a {
    text-decoration: none;
    color: var(--color-black);
    font-weight: 500;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    transition: transform .15s ease
}

nav a:hover {
    transform: translate(3px)
}

nav a:hover span {
    transform: translate(2px)
}

nav span {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    transition: transform .15s ease
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md)
}

li {
    border-bottom: 1px solid var(--color-gray-200);
    padding-bottom: var(--space-md)
}

li a {
    font-weight: 700;
    font-size: 1.25rem
}

article {
    font-size: 1rem;
    line-height: 1.6
}

article h1, article h2, article h3, article h4, article h5, article h6 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    font-weight: 600
}

article h2 {
    font-size: 1.5rem
}

article h3 {
    font-size: 1.25rem
}

article p {
    margin-bottom: var(--space-md)
}

article a {
    color: var(--color-black);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: .2em
}

article ul, article ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-xl);
    display: block
}

article li {
    margin-bottom: var(--space-xs);
    border-bottom: none;
    padding-bottom: 0
}

article pre, article code {
    font-family: var(--font-mono);
    background-color: var(--color-gray-200);
    padding: var(--space-xs);
    border-radius: 2px;
    font-size: .9rem
}

article pre {
    padding: var(--space-md);
    overflow-x: auto;
    margin-bottom: var(--space-md)
}

article pre code {
    background-color: transparent;
    padding: 0
}

article blockquote {
    border-left: 4px solid var(--color-black);
    padding-left: var(--space-md);
    font-style: italic;
    margin-left: var(--space-md);
    margin-right: var(--space-md);
    margin-bottom: var(--space-md)
}

article img {
    max-width: 100%;
    height: auto;
    margin: var(--space-md) 0
}

@media (max-width: 640px) {
    main > div {
        padding: var(--space-xl) var(--space-md)
    }

    h1 {
        font-size: 1.5rem
    }

    footer {
        flex-direction: column;
        gap: var(--space-xs);
        align-items: flex-start
    }
}