@import url('https://fonts.googleapis.com/css2?family=Fira+Mono:wght@400;500;700&family=Source+Serif+4:ital,opsz,wght@0,8..60,200..900;1,8..60,200..900&display=swap');

* { box-sizing: border-box; }

body {
  font-family: "Source Serif 4", Georgia, serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #000;
  color: #c9d1d9;
}

code, pre {
  font-family: "Fira Mono", monospace;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: #0d1117;
  color: #c9d1d9;
  padding: 20px;
  overflow-y: auto;
  position: fixed;
  height: 100vh;
  border-right: 1px solid #21262d;
  transition: transform 0.3s ease;
}

.logo {
  font-size: 1.5em;
  font-weight: bold;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #58a6ff;
  text-align: center;
  color: #f0f6fc;
}

.nav-section {
  margin-bottom: 20px;
}

.nav-section h3 {
  color: #58a6ff;
  margin: 0 0 10px 0;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-link {
  display: block;
  color: #8b949e;
  text-decoration: none;
  padding: 6px 12px;
  margin: 2px 0;
  border-radius: 4px;
  font-size: 0.9em;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
  background: #161b22;
  color: #f0f6fc;
}

.nav-link.active {
  background: #1f6feb;
  color: #fff;
}

/* Main content */
.main-content {
  margin-left: 280px;
  padding: 40px;
  min-height: 100vh;
}

.content {
  max-width: 860px;
  margin: 0 auto;
}

.content h1 {
  color: #f0f6fc;
  border-bottom: 2px solid #21262d;
  padding-bottom: 8px;
  font-size: 2em;
}

.content h2 { color: #c9d1d9; margin-top: 2em; }
.content h3 { color: #8b949e; }

.content a {
  color: #58a6ff;
  text-decoration: none;
}

.content a:hover {
  text-decoration: underline;
}

.content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

/* Code */
.content code {
  background: #161b22;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
  color: #e6edf3;
}

.content pre {
  background: #0d1117;
  border: 1px solid #21262d;
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  line-height: 1.5;
}

.content pre code {
  background: none;
  padding: 0;
  font-size: 0.85em;
}

/* Tables */
.content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
}

.content th, .content td {
  border: 1px solid #21262d;
  padding: 8px 12px;
  text-align: left;
}

.content th {
  background: #161b22;
  color: #f0f6fc;
}

.content tr:nth-child(even) {
  background: #0d1117;
}

/* Blockquotes */
.content blockquote {
  border-left: 3px solid #58a6ff;
  margin: 1em 0;
  padding: 0.5em 1em;
  color: #8b949e;
  background: #0d1117;
  border-radius: 0 4px 4px 0;
}

/* Lists */
.content ul, .content ol {
  padding-left: 1.5em;
}

.content li {
  margin-bottom: 0.3em;
}

/* Bonus nav link */
.bonus-nav {
  margin-bottom: 2em;
}

.bonus-nav a {
  color: #58a6ff;
  text-decoration: none;
  font-weight: 500;
}

.bonus-nav a:hover {
  text-decoration: underline;
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1001;
  background: #1f6feb;
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 18px;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 1000;
  }
  .main-content {
    margin-left: 0;
  }
  .nav-toggle {
    display: block;
  }
  .sidebar.open {
    transform: translateX(0);
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 20px 16px;
  }
}