* {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
}

:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --secondary-bg: #f9f9f9;
  --border-color: #ddd;
  --hover-bg: #eee;
  --code-border: #ddd;
  --shadow-color: #eee;
  --link-color: #0066cc;
  --link-hover-color: #0052a3;
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #ffffff;
  --secondary-bg: #2d2d2d;
  --border-color: #404040;
  --hover-bg: #333333;
  --code-border: #404040;
  --shadow-color: #0a0a0a;
  --link-color: #6cb6ff;
  --link-hover-color: #99ccff;
}

/* header and footer areas */
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
}

.menu {
  padding: 0;
  margin: 0;
}
.menu li { display: inline-block; margin: 2px}
.article-meta, .menu a {
  text-decoration: none;
  padding: 10px;
  border-radius: 5px;
}

.article-meta, .menu a:hover {
  background: var(--hover-bg);
}

.nav-buttons button {
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  background: none;
}

.nav-buttons svg {
  color: var(--text-color);
  width: 1.2em;
}

.nav-buttons svg:hover {
  transform: scale(1.2);
}

/* Links */
a {
  color: var(--link-color);
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover-color);
}

.article-meta, footer { text-align: center; }
.title { font-size: 1.1em; }

footer { font-size: 0.8em; } 

hr {
  border-style: dashed;
  color: var(--border-color);
}

/* code */
pre {
  border: 1px solid var(--code-border);
  box-shadow: 5px 5px 5px var(--shadow-color);
  padding: 1em;
  overflow-x: auto;
  background: var(--secondary-bg);
}
code { background: var(--secondary-bg); }
pre code { background: none; }

/* misc elements */
img, iframe, video { max-width: 100%; }
main { hyphens: auto; }
blockquote {
  background: var(--secondary-bg);
  border-left: 5px solid var(--border-color);
  padding: 3px 1em 3px;
}

table {
  margin: auto;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
table thead th { border-bottom: 1px solid var(--border-color); }
th, td { padding: 5px; }
thead, tfoot, tr:nth-child(even) { background: var(--hover-bg); }

body {
  max-width: 800px;
  margin: auto;
  padding: 1em;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

main {
  hyphens: auto;
  flex: 1;
}