:root {
    --bg: #ffffff;
    --fg: #222222;
    --fg-muted: #888888;
    --accent: #268bd2;
    --code-bg: #f6f6f6;
    --border: #cccccc;
    --max-width: 700px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.7;
    color: var(--fg);
    background: var(--bg);
    padding: 2.5rem 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: sans-serif;
    color: #222;
    font-weight: bold;
    line-height: 1.5;
    margin: 0 0 15px;
}

h1 {
    font-size: 30px;
    margin-top: 5px;
    margin-bottom: 15px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

p {
    margin-bottom: 1rem;
}

article header {
    margin-bottom: 2.5rem;
}

article header h1 {
    margin-top: 0;
    margin-bottom: 0.25rem;
    font-size: 32px;
}

article header time {
    color: var(--fg-muted);
    font-size: 0.9rem;
}

code {
    font-family: "SF Mono", "Fira Code", Menlo, Consolas, monospace;
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 0.15em 0.35em;
    border-radius: 3px;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

pre code {
    background: none;
    padding: 0;
    font-size: 0.82rem;
    line-height: 1.5;
}

pre code.hljs {
    background: none;
    padding: 0;
}

blockquote {
    border-left: 3px solid var(--border);
    padding-left: 1rem;
    margin-bottom: 1rem;
    color: var(--fg-muted);
    font-style: italic;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

img {
    max-width: 100%;
    padding: 10px 0;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.math {
    margin: 1.5rem 0;
    overflow-x: auto;
}

table {
    padding: 0;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

table tr {
    border-top: 1px solid #cccccc;
    background-color: white;
    margin: 0;
    padding: 0;
}

table tr:nth-child(2n) {
    background-color: #f8f8f8;
}

table tr th {
    font-weight: bold;
    border: 1px solid #cccccc;
    text-align: left;
    margin: 0;
    padding: 6px 13px;
}

table tr td {
    border: 1px solid #cccccc;
    text-align: left;
    margin: 0;
    padding: 6px 13px;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    margin-bottom: 0.4rem;
}

ul li time {
    color: var(--fg-muted);
    font-size: 0.85rem;
}

footer {
    margin-top: 2rem;
    color: var(--fg-muted);
    font-size: 0.9rem;
}

.manim {
    margin: 1.5rem 0;
    background: #000;
    border-radius: 4px;
    overflow: hidden;
}

.manim video {
    width: 100%;
    display: block;
}