/* Theme Variables and Styles */

:root {
  /* Light theme (default) */
  --bg-color: #ffffff;
  --text-color: #24292e;
  --heading-color: #24292e;
  --link-color: #0366d6;
  --link-hover-color: #044289;
  --nav-bg: #f8f9fa;
  --border-color: #e1e4e8;
  --code-bg: #f6f8fa;
  --blockquote-border: #dfe2e5;
  --button-bg: #f4f4f4;
  --button-text: #24292e;
  --card-bg: #ffffff;
  --card-shadow: rgba(0, 0, 0, 0.1);
}

/* Dark theme */
[data-theme="dark"] {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --heading-color: #e6edf3;
  --link-color: #58a6ff;
  --link-hover-color: #79c0ff;
  --nav-bg: #161b22;
  --border-color: #30363d;
  --code-bg: #1f2937;
  --blockquote-border: #3b434b;
  --button-bg: #21262d;
  --button-text: #c9d1d9;
  --card-bg: #161b22;
  --card-shadow: rgba(0, 0, 0, 0.3);
}

/* Apply theme colors to elements */
body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading-color);
  margin-top: 24px;
  margin-bottom: 16px;
  font-weight: 600;
  line-height: 1.25;
}

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

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

code, pre {
  background-color: var(--code-bg);
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 85%;
  border-radius: 3px;
}

pre {
  padding: 16px;
  overflow: auto;
  line-height: 1.45;
}

blockquote {
  padding: 0 1em;
  color: var(--text-color);
  border-left: 0.25em solid var(--blockquote-border);
  margin: 0 0 16px 0;
}

hr {
  height: 0.25em;
  padding: 0;
  margin: 24px 0;
  background-color: var(--border-color);
  border: 0;
}

/* Theme toggle button */
#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 1000;
  transition: background-color 0.3s ease, color 0.3s ease;
  box-shadow: 0 2px 5px var(--card-shadow);
  opacity: 0.9;
}

#theme-toggle:hover {
  transform: scale(1.05);
  opacity: 1;
}

/* Only apply transitions to the theme-related properties */
body, a, h1, h2, h3, h4, h5, h6, code, pre, blockquote, hr, #theme-toggle {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}