/* style.css */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0; padding: 0;
  background: #0d1117; color: #e6edf3;
  line-height: 1.6;
}

.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: #161b22;
  border-right: 1px solid #30363d;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid #30363d;
}

.brand {
  font-size: 1.8rem;
  font-weight: 700;
  color: #f0f6fc;
  text-decoration: none;
  display: block;
  margin-bottom: 4px;
}

.version {
  font-size: 0.85rem;
  color: #8b949e;
  margin: 0;
}

.sidebar-nav {
  padding: 20px 0;
  flex: 1;
}

.sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav .nav-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8b949e;
  padding: 0 24px;
  margin-bottom: 8px;
  font-weight: 600;
}

.sidebar-nav a {
  display: block;
  padding: 8px 24px;
  color: #c9d1d9;
  text-decoration: none;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}

.sidebar-nav a:hover {
  background: #21262d;
  color: #58a6ff;
}

.sidebar-nav a.active {
  background: #23863622;
  color: #3fb950;
  border-left: 3px solid #3fb950;
  padding-left: 21px;
}

.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid #30363d;
  display: flex;
  gap: 16px;
}

.sidebar-footer a {
  color: #8b949e;
  text-decoration: none;
  font-size: 0.85rem;
}

.sidebar-footer a:hover {
  color: #58a6ff;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 48px 48px 40px;
  min-width: 0;
  max-width: 1440px;
}

.content-wrapper {
  max-width: 1200px;
}

.content-wrapper h1 {
  font-size: 2.8rem;
  color: #f0f6fc;
  margin-top: 0;
  margin-bottom: 16px;
  border-bottom: 1px solid #21262d;
  padding-bottom: 16px;
}

.content-wrapper h1 + p {
  font-size: 1.15rem;
  color: #8b949e;
  margin-top: 0;
  margin-bottom: 8px;
}

.content-wrapper h1 + p + hr {
  margin-top: 20px;
  margin-bottom: 32px;
  border: none;
  border-top: 1px solid #21262d;
}

.content-wrapper h2 {
  font-size: 1.8rem;
  color: #f0f6fc;
  margin-top: 40px;
  margin-bottom: 16px;
  border-bottom: 1px solid #21262d;
  padding-bottom: 8px;
}

.content-wrapper h3 {
  font-size: 1.4rem;
  color: #f0f6fc;
  margin-top: 32px;
  margin-bottom: 16px;
}

.content-wrapper p, .content-wrapper li {
  font-size: 1rem;
  color: #c9d1d9;
}

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

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

/* Code blocks */
.code-wrapper {
  position: relative;
  margin: 16px 0;
}

.content-wrapper pre {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0;
}

/* Copy button */
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #21262d;
  color: #8b949e;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
}

.code-wrapper:hover .copy-btn,
.code-wrapper:focus-within .copy-btn,
.copy-btn:focus {
  opacity: 1;
}

.copy-btn:hover {
  background: #30363d;
  color: #c9d1d9;
}

.copy-btn.copied {
  background: #238636;
  color: #fff;
  border-color: #2ea043;
  opacity: 1;
}

.content-wrapper code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  background: #161b22;
  padding: 0.2em 0.4em;
  border-radius: 6px;
  font-size: 0.9em;
}

.content-wrapper pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: #e6edf3;
}

/* Syntax highlighting */
.highlight .c, .highlight .c1, .highlight .cm { color: #8b949e; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kv { color: #ff7b72; }
.highlight .s, .highlight .sb, .highlight .sc, .highlight .dl, .highlight .sd, .highlight .s2, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .s1, .highlight .ss { color: #a5d6ff; }
.highlight .m, .highlight .mb, .highlight .mf, .highlight .mh, .highlight .mi, .highlight .il, .highlight .mo { color: #79c0ff; }
.highlight .nx, .highlight .nb, .highlight .bp, .highlight .nc { color: #d2a8ff; }

/* Tables */
.content-wrapper table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

.content-wrapper th, .content-wrapper td {
  border: 1px solid #30363d;
  padding: 10px 16px;
  text-align: left;
}

.content-wrapper th {
  background: #161b22;
  font-weight: 600;
  color: #f0f6fc;
}

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

/* Blockquotes */
.content-wrapper blockquote {
  border-left: 4px solid #30363d;
  margin: 0;
  padding: 0 16px;
  color: #8b949e;
}

/* Images */
.content-wrapper img {
  max-width: 100%;
  border-radius: 6px;
}

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    position: static;
    border-right: none;
    border-bottom: 1px solid #30363d;
    height: auto;
    overflow-y: visible;
  }
  .main-content {
    margin-left: 0;
    padding: 24px;
  }
}