:root {
  --background-body: #0d1117;
  --background: #161b22;
  --background-alt: #1c2128;
  --selection: #388bfd;
  --text-main: #c9d1d9;
  --text-bright: #f0f6fc;
  --text-muted: #8b949e;
  --links: #58a6ff;
  --focus: #388bfd;
  --border: #30363d;
  --code: #f78166;
  --animation-duration: 0.1s;
  --button-hover: #388bfd;
  --scrollbar-thumb: #30363d;
  --scrollbar-thumb-hover: #484f58;
  --form-placeholder: #8b949e;
  --form-text: #f0f6fc;
  --variable: #ffa657;
  --highlight: #388bfd;
  --select-arrow: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' height='63' width='117' fill='%23efefef'%3E%3Cpath d='M115 2c-1-2-4-2-5 0L59 53 7 2C6 0 3 0 2 2 0 4 0 6 2 8l53 53c2 2 4 2 6 0l52-53c1-2 1-4-1-5z'/%3E%3C/svg%3E");
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  background-color: var(--background-body);
  color: var(--text-main);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-bright);
  margin-top: 2em;
  margin-bottom: 0.5em;
}

h1 { font-size: 2.2em; border-bottom: 2px solid var(--border); padding-bottom: 0.3em; }
h2 { font-size: 1.8em; border-bottom: 1px solid var(--border); padding-bottom: 0.2em; }
h3 { font-size: 1.4em; }
h4 { font-size: 1.2em; }

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

a:hover {
  text-decoration: underline;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  background-color: var(--background);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background-color: var(--background-alt);
  color: var(--text-bright);
  font-weight: 600;
}

tr:hover {
  background-color: var(--background-alt);
}

code {
  background-color: var(--background);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, Inconsolata, "Fira Code", monospace;
  font-size: 0.9em;
  color: var(--code);
}

pre {
  background-color: var(--background);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
}

blockquote {
  border-left: 4px solid var(--highlight);
  margin: 1em 0;
  padding: 0.5em 1em;
  background-color: var(--background);
  border-radius: 0 8px 8px 0;
  font-style: italic;
}

#TOC {
  background-color: var(--background);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 2em;
  border: 1px solid var(--border);
}

#TOC ul {
  list-style-type: none;
  padding-left: 0;
}

#TOC ul ul {
  padding-left: 20px;
}

#TOC a {
  color: var(--text-muted);
  display: block;
  padding: 4px 0;
}

#TOC a:hover {
  color: var(--links);
}

header {
  text-align: center;
  padding: 2em 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 2em;
}

header h1 {
  margin: 0;
  border: none;
}

.highlight-box {
  background: linear-gradient(135deg, var(--background) 0%, var(--background-alt) 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 1em 0;
}

.metric-card {
  display: inline-block;
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 24px;
  margin: 8px;
  text-align: center;
}

.metric-value {
  font-size: 2em;
  font-weight: bold;
  color: var(--highlight);
}

.metric-label {
  font-size: 0.9em;
  color: var(--text-muted);
}

@media print {
  body {
    background: white;
    color: black;
  }
  
  #TOC {
    display: none;
  }
}