:root {
    --bg-color: #000000;
    --text-main: #ffffff;
    --text-body: #d0d0d0;
    --text-muted: #ffffff99;
    --accent-color: #60a5fa;
    --code-bg: #1a1a1a;
    --border-color: #ffffff2e;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

::selection {
    background-color: #ffffff;
    color: #000000;
}

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

html, body {
    background-color: var(--bg-color);
    min-height: 100vh;
}

body {
    color: var(--text-main);
    font-family: var(--font-stack);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

body.landing {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header {
    display: flex;
    flex-direction: column;
    align-items: center;
}

header h1 {
    text-transform: uppercase;
    margin-bottom: 1rem;
}

header nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

header nav a {
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

header nav a:hover {
    color: var(--text-main);
}

#preamble,
#content {
    width: min(44rem, 100% - 3rem);
    margin-inline: auto;
}

#preamble {
    padding-top: 2.5rem;
}

#preamble nav a {
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

#preamble nav a:hover {
    color: var(--text-main);
}

#content {
    padding-block: 2.5rem 5rem;
    color: var(--text-body);
    line-height: 1.7;
}

#content h1,
#content h2,
#content h3,
#content h4 {
    color: var(--text-main);
    line-height: 1.3;
    margin-block: 2.5rem 1rem;
}

#content h1.title {
    text-transform: uppercase;
    margin-block: 0 2rem;
}

#content p,
#content ul,
#content ol,
#content dl,
#content pre,
#content blockquote,
#content table {
    margin-bottom: 1rem;
}

#content ul,
#content ol {
    padding-left: 1.5rem;
}

#content dt {
    color: var(--text-main);
    font-weight: 600;
}

#content dd {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

#content img {
    max-width: 100%;
}

#content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin-block: 2rem;
}

#content a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

#content a:hover {
    color: var(--text-main);
}

#content pre,
#content code {
    font-family: var(--font-mono);
    background-color: var(--code-bg);
}

#content pre {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.9rem;
}

#content code {
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

#content pre code {
    padding: 0;
    background: none;
}

#content blockquote {
    border-left: 3px solid var(--accent-color);
    padding-left: 1rem;
    font-style: italic;
}

#content table {
    border-collapse: collapse;
    width: 100%;
}

#content th,
#content td {
    border: 1px solid var(--border-color);
    padding: 0.6rem 0.75rem;
    text-align: left;
}

.org-keyword,
.org-builtin,
.org-type {
    color: var(--accent-color);
}

.org-string,
.org-doc {
    color: var(--text-main);
}

.org-constant,
.org-variable-name,
.org-function-name {
    color: var(--text-main);
    font-weight: 600;
}

.org-comment,
.org-comment-delimiter {
    opacity: 0.65;
    font-style: italic;
}