:root {
  --bg-color: #0a0a0a;
  --text-color: #f0f0f0;
  --accent-color: #00ff00;
  --muted-color: #666;
  --border-color: #333;
  --link-color: #4af626;
}

@font-face {
  font-family: 'Fira Code';
  src: url('./fonts/FiraCode-Regular.woff2') format('woff2');
  font-display: swap;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0 auto;
  padding: 1rem;
  font: 400 0.95rem/1.6 'Fira Code', monospace;
  color: var(--text-color);
  background: var(--bg-color);
  max-width: 900px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 1.5rem 0;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

header h1, header h1 a {
  margin: 0;
  font: normal 1.5rem 'Fira Code';
  color: var(--accent-color);
  text-decoration: none;
}

.nav-container {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.nav-container a {
  color: var(--text-color);
  padding: 0.25rem 0.5rem;
  border: 1px solid transparent;
}

.nav-container a:hover, .nav-container a.active {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

main { margin: 1rem 0; flex: 1; }

h2, h3 {
  color: var(--accent-color);
  margin: 1.5rem 0 1rem;
  font-weight: normal;
}

h2 { font-size: 1.3rem; }
h3 { font-size: 1.1rem; }

a {
  color: var(--link-color);
  text-decoration: none;
  border-bottom: 1px dashed var(--link-color);
}

a:hover {
  border-bottom-style: solid;
}

ul, ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

li {
  margin: 0.5rem 0;
}

pre, .card {
  margin: 1.25rem 0;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.2);
  border-left: 3px solid var(--accent-color);
  overflow-x: auto;
}

code {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.2rem 0.25rem;
  font-size: 0.9em;
}

footer {
  margin-top: 2rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.9rem;
}

.pgp-key {
  color: #666;
  font-size: 0.85rem;
  margin: 3rem 0;
}

@media (max-width: 768px) {
  body { padding: 0.75rem; }
  .nav-container { flex-direction: column; }
}

.toggle-header { cursor: pointer; }

.toggle-arrow {
  display: inline-block;
  transition: transform 0.3s;
  font-size: 0.8em;
}

.collapsed .toggle-arrow { 
  transform: rotate(-90deg); 
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.toggle-header:not(.collapsed) + .collapsible-content {
  max-height: 5000px;
}