/* Minimal, timeless typography */

:root {
    --text: #222;
    --text-secondary: #555;
    --bg: #fff;
    --link: #0066cc;
    --link-visited: #551a8b;
    --code-bg: #f5f5f5;
    --border: #ddd;
    --max-width: 42rem;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 18px;
    line-height: 1.6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    margin: 0;
    padding: 2rem 1rem;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
}

nav {
    margin-bottom: 1.5em;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9em;
}

nav a:hover {
    color: hsl(258, 88%, 66%);
}

/* Typography */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    margin: 1.5em 0 0.5em;
    font-weight: 600;
}

h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4, h5, h6 { font-size: 1rem; }

p {
    margin: 1em 0;
}

/* Links */

a {
    color: hsl(258, 88%, 66%);
    text-decoration: underline;
}

a:visited {
    color: hsl(258, 88%, 66%);
}

a:hover {
    color: hsl(258, 88%, 76%);
}

.broken-link {
    color: var(--text-secondary);
    border-bottom: 1px dashed var(--border);
}

/* Lists */

ul, ol {
    padding-left: 1.5em;
    margin: 1em 0;
}

li {
    margin: 0.25em 0;
}

/* Code */

code {
    font-family: "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9em;
    background: var(--code-bg);
    padding: 0.1em 0.3em;
    border-radius: 3px;
}

pre {
    background: var(--code-bg);
    padding: 1em;
    overflow-x: auto;
    border-radius: 4px;
    margin: 1em 0;
}

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

/* Code block with copy button */
.code-block {
    position: relative;
    margin: 1em 0;
}

.code-block pre {
    margin: 0;
}

.copy-btn {
    position: absolute;
    top: 0.5em;
    right: 0.5em;
    padding: 0.25em 0.5em;
    font-size: 0.8em;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0.7;
}

.copy-btn:hover {
    opacity: 1;
    background: var(--code-bg);
}

/* Blockquotes */

blockquote {
    margin: 1em 0;
    padding-left: 1em;
    border-left: 3px solid hsl(258, 88%, 66%);
    color: var(--text-secondary);
}

/* Images */

img {
    max-width: 100%;
    height: auto;
}

/* Large images get block display with margin */
img:not([width]), img[width="400"], img[width="300"], img[width="200"] {
    display: block;
    margin: 1em 0;
}

/* Small images (avatars) stay inline */
img[width="40"], img[width="80"], img[width="60"], img[width="50"] {
    display: inline;
    vertical-align: middle;
    margin-right: 0.5em;
    border-radius: 50%;
}

/* Horizontal rule */

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

/* Responsive */

@media (max-width: 600px) {
    html {
        font-size: 16px;
    }

    body {
        padding: 1rem;
    }
}