/* ========================================
 * BUREAU LIGHT — Stripped for Two Balls
 * Gray, white, square, monospace, brutal.
 * ======================================== */

:root {
  --bur-bg: #fafafa;
  --bur-surface: #f0f0f0;
  --bur-elevated: #eeeeee;
  --bur-border: #333333;
  --bur-border-dim: rgba(51, 51, 51, 0.3);
  --bur-text: #333333;
  --bur-text-secondary: #666666;
  --bur-text-dim: #999999;
  --bur-text-bright: #222222;
  --bur-mono: 'Courier New', Courier, monospace;
  --bur-serif: 'Courier New', Courier, monospace;
}

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

html { font-size: 14px; }

body {
  font-family: var(--bur-serif);
  background: var(--bur-bg);
  color: var(--bur-text);
  line-height: 1.7;
  min-height: 100vh;
}

/* --- Header --- */
.header {
  background: var(--bur-surface);
  border-bottom: 2px solid var(--bur-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1rem;
  font-weight: normal;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--bur-text-bright);
  text-decoration: none;
}

.site-title:hover { color: var(--bur-text); }

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--bur-text-secondary);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--bur-text-bright);
  border-bottom-color: var(--bur-border);
}

/* --- Content --- */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* --- Paper --- */
.paper h1 {
  font-size: 1.3rem;
  font-weight: normal;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--bur-text-bright);
  margin: 0 0 0.5rem;
  line-height: 1.4;
}

.paper h1 + p {
  font-style: italic;
  color: var(--bur-text-dim);
  margin-bottom: 2rem;
}

.paper h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--bur-text-secondary);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--bur-border-dim);
}

.paper h3 {
  font-size: 0.95rem;
  color: var(--bur-text-secondary);
  margin: 1.8rem 0 0.8rem;
}

.paper p {
  margin: 0 0 1rem;
  text-align: justify;
  hyphens: auto;
}

.paper strong { color: var(--bur-text-bright); }

.paper em { font-style: italic; }

.paper blockquote {
  border-left: 2px solid var(--bur-border);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  color: var(--bur-text-secondary);
  background: var(--bur-surface);
}

.paper pre {
  background: var(--bur-surface);
  border: 1px solid var(--bur-border-dim);
  border-left: 3px solid var(--bur-border);
  padding: 1rem;
  margin: 1rem 0;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

.paper code {
  font-family: var(--bur-mono);
  font-size: 0.9em;
}

.paper p code {
  background: var(--bur-surface);
  padding: 0.1rem 0.3rem;
  border: 1px solid var(--bur-border-dim);
}

.paper ul, .paper ol {
  margin: 0 0 1rem 1.5rem;
}

.paper li {
  margin-bottom: 0.3rem;
}

.paper hr {
  border: none;
  border-top: 1px solid var(--bur-border-dim);
  margin: 2rem 0;
}

/* References section */
.paper h2:last-of-type ~ p {
  font-size: 0.85rem;
  text-indent: -1.5rem;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
}

/* --- Diagrams page --- */
.diagrams-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

#diagrams-root {
  border: 2px solid var(--bur-border);
  background: #fff;
}

/* Override JSX dark theme to match Bureau Light on the outer wrapper only.
   The SVG internals keep their dark panel backgrounds for contrast —
   the diagrams are meant to pop against the paper. */

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--bur-text-dim);
  font-size: 0.75rem;
  letter-spacing: 1px;
  border-top: 1px solid var(--bur-border-dim);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .header-inner { flex-direction: column; gap: 0.5rem; }
  nav { gap: 1rem; }
  .container, .diagrams-container { padding: 1.5rem 1rem 3rem; }
  .paper h1 { font-size: 1.1rem; }
}