* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-purple: #bc8cff;
  --accent-blue: #58a6ff;
  --accent-pink: #ff7b72;
  --border-color: #30363d;
  --gradient: linear-gradient(135deg, #bc8cff 0%, #58a6ff 50%, #ff7b72 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

header {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem 1rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
}

header h1 {
  font-size: 2rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

main {
  padding: 2rem 0;
}

main h2 {
  color: var(--accent-blue);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.75rem;
}

main h2:first-child {
  margin-top: 0;
}

main h3 {
  color: var(--accent-purple);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

main p, main ul {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

main ul {
  padding-left: 2rem;
}

main li {
  margin-bottom: 0.5rem;
}

main a {
  color: var(--accent-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

main a:hover {
  border-bottom-color: var(--accent-blue);
}

main code {
  background: var(--bg-secondary);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--accent-pink);
  font-family: 'Monaco', 'Courier New', monospace;
}

main pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  position: relative;
}

main pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.875rem;
}

footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
}

/* Code clipboard button styling */
.code-copy {
  background: var(--bg-tertiary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: 4px !important;
  padding: 0.4rem 0.5rem !important;
  transition: all 0.2s !important;
}

.code-copy:hover {
  background: var(--accent-blue) !important;
  border-color: var(--accent-blue) !important;
  opacity: 1 !important;
}

.code-copy span {
  filter: invert(0.7);
}

.code-copy:hover span {
  filter: invert(1);
}

/* Tooltip styling for copy feedback */
.tooltipped::before,
.tooltipped::after {
  background: var(--accent-purple) !important;
  color: var(--bg-primary) !important;
  border-color: var(--accent-purple) !important;
}