/* GLOBAL */
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: #0d1117;
  color: #e6e6e6;
}

/* HEADER */
header {
  background: #0b0f1a;
  border-bottom: 1px solid #1f2937;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 20px;
  font-weight: 600;
  color: #e6e6e6;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

header .logo {
  height: 36px;
}

#search {
  margin-left: auto;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: #1a2332;
  color: #e6e6e6;
  outline: none;
  width: 240px;
  transition: 0.2s;
}

#search:focus {
  background: #1f2a3d;
  box-shadow: 0 0 8px #3b82f6;
}

/* LAYOUT */
#container {
  display: flex;
  height: calc(100vh - 70px);
}

/* SIDEBAR */
#sidebar {
  width: 260px;
  background: #0f1622;
  border-right: 1px solid #1f2937;
  padding: 20px;
  overflow-y: auto;
  box-shadow: 4px 0 12px rgba(0,0,0,0.3);
}

#sidebar h2 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #3b82f6;
  text-transform: uppercase;
  letter-spacing: 1px;
}

#sidebar a {
  display: block;
  padding: 10px 12px;
  color: #cbd5e1;
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 6px;
  transition: 0.15s;
}

#sidebar a:hover {
  background: #1a2332;
  color: #3b82f6;
  transform: translateX(4px);
}

/* CONTENT */
#content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

#viewer {
  background: #111827;
  padding: 28px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
  opacity: 1;
  transition: opacity 0.15s ease-in-out;
}

/* TABLE OF CONTENTS */
#toc {
  background: #0f1622;
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 0 12px rgba(59,130,246,0.2);
}

#toc a {
  display: block;
  color: #60a5fa;
  margin-bottom: 6px;
  text-decoration: none;
}

#toc a:hover {
  text-decoration: underline;
}

/* BREADCRUMBS */
#breadcrumbs {
  margin-bottom: 12px;
  color: #94a3b8;
}