/* Light Mode (default) */
:root {
  /* Color Palette */
  --primary-color: #2980b9;   /* Blue */
  --secondary-color: #D1D1D1; /* Light Gray */
  --text-color: #333;         /* Dark Gray for text */
  --text-muted: #AAA;         /* Light Gray for muted text */
  --hover-color: #2980b9;     /* Hover color (same as primary) */
  --link-color: black;        /* Default link color */
  --background-light: #F1F1F1;/* Light background for pre */
  --background-dark: #2c3e50; /* Dark background for pre in dark mode */
  --border-color: #D1D1D1;    /* Light Gray border color */
  --footer-background: #fff;  /* Light footer background */
  --body-background: #fff;    /* Light body background */
}

/* Dark Mode */
[data-theme="dark"] {
  --primary-color: #3498db;  /* Lighter blue for dark mode */
  --secondary-color: #555;   /* Darker gray for borders */
  --text-color: #ccc;        /* Light gray for text */
  --text-muted: #888;        /* Muted text in dark mode */
  --hover-color: #1abc9c;    /* Teal hover color */
  --link-color: #ecf0f1;     /* Light color links */
  --background-light: #34495e; /* Darker background for pre */
  --background-dark: #1c2833;  /* Dark background for pre */
  --border-color: #555;      /* Dark border color */
  --footer-background: #2c3e50; /* Dark footer background */
  --body-background: #2e3b4e;  /* Dark body background */
}

.header {
  margin-bottom: 1.5em;
  padding-bottom: 1em;
  min-height: 3.1em;
  border-bottom: 2px solid var(--primary-color);
}

.header a:hover,
.footer a:hover {
  border: none;
}

.header:after {
  content: '';
  clear: both;
  display: block;
}

.logo {
  float: left;
  margin-top: 0.3em;
}

.logo a {
  background-color: var(--primary-color);
  color: white;
  padding: 0.2em 0.2em;
  font-size: 1.4em;
}

.logo a:hover {
  color: white;
}

.menu {
  float: right;
  padding: 0;
  margin: 0;
}

.menu li {
  display: inline-block;
  padding: 0.4em 0 0.4em 2em;
}

.menu a {
  font-weight: 600;
}

.main {
  min-height: 18em;
  padding-bottom: 3em;
  border-bottom: 2px solid var(--primary-color);
}

.main a {
  border-bottom: 2px solid var(--border-color);
}

.main p,
.main ul {
  margin-top: 0;
  margin-bottom: 0.5em;
}

.page {
  font-size: 0.95em;
}

.article {
  margin-bottom: 4em;
  font-size: 0.9em;
  line-height: 1.4em;
}

.articleinfo {
  color: var(--text-muted);
  margin-bottom: 1em;
  font-size: 0.9em;
}

.articletitle {
  margin-bottom: 0;
}

.footer {
  padding: 1em 0 2em;
  font-size: .75em;
  background-color: var(--footer-background);
  color: var(--text-muted);
}

.footer .left {
  float: left;
}

.footer .right {
  float: right;
}

* {
  margin: 0;
}

html {
  height: 100%;
  font-family: sans-serif;
  font-size: 1.25em;
}

body {
  margin: 0 auto;
  padding: 3em 3em 1em 3em;
  max-width: 44em;
  line-height: 1.5em;
  color: var(--text-color);
  background-color: var(--body-background);
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color .2s, background .2s, border .2s;
}

a:hover {
  border-bottom: 2px solid var(--link-color);
  color: var(--hover-color);
}

img {
  max-width: 100%;
}

h1 {
  font-size: 2em;
  font-weight: 300;
  margin-bottom: .5em;
  line-height: 1.25em;
  color: var(--primary-color);
}

h2 {
  font-size: 1.95em;
  font-weight: 300;
  margin-bottom: .5em;
  line-height: 1.25em;
}

h3 {
  font-size: 1.4em;
  font-weight: 400;
  margin-bottom: .5em;
  line-height: 1.25em;
}

h4 {
  font-size: 1.2em;
  font-weight: 600;
  margin-bottom: .5em;
  line-height: 1.25em;
}

blockquote {
  background: none;
  border-left: 3px solid #777;
  color: #777;
  padding: 0 0 0 10px;
  margin-left: 1.2em;
}

hr {
  margin: 2em 0;
  height: 2px;
  background-color: var(--secondary-color);
  border: none;
}

pre {
  background-color: var(--background-light);
  margin-bottom: 0.7em;
  line-height: 1.5em;
}

@media (max-width: 640px) {
  body {
    padding: 1.25em;
  }

  .header {
    padding-bottom: 0;
  }

  .logo {
    float: none;
  }

  .menu {
    float: none;
    margin-top: 2em;
  }

  .menu li {
    display: block;
    padding: 0.2em 0;
    margin: 0.2em;
    border-top: 1px solid var(--border-color);
  }
}