/* paper.css — styling for the full white paper HTML version.
 * Builds on styles.css (which provides CSS variables for the Frost Cosmic palette).
 * Single-column reading layout, max-width ~720px, dark theme, comfortable line length.
 */

:root {
  --paper-text: #E5EAF2;
  --paper-text-muted: #A0AEC0;
  --paper-bg: #0A0E1A;
  --paper-bg-alt: rgba(255, 255, 255, 0.03);
  --paper-border: rgba(255, 255, 255, 0.08);
  --paper-accent: #00E5FF;
  --paper-accent-soft: #5B9CD6;
  --paper-max-width: 720px;
}

body.paper-body {
  background: var(--paper-bg);
  color: var(--paper-text);
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar (back link + download button) ---------- */
.paper-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.5rem;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--paper-border);
}

.paper-back {
  color: var(--paper-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.paper-back:hover { color: var(--paper-accent); }

.paper-download-btn {
  display: inline-block;
  background: var(--paper-accent);
  color: #0A0E1A;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.paper-download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 229, 255, 0.35);
}

/* ---------- article layout ---------- */
.paper-main {
  padding: 3rem 1.5rem 4rem;
}

.paper-article {
  max-width: var(--paper-max-width);
  margin: 0 auto;
}

/* ---------- title block ---------- */
.paper-title-block {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--paper-border);
}

.paper-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 3px;
  font-weight: 600;
  color: var(--paper-accent-soft);
  margin: 0 0 1.25rem;
}

.paper-title-block h1 {
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  font-weight: 700;
  line-height: 1.15;
  color: #FFFFFF;
  text-transform: none;
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

.paper-subtitle {
  font-size: 1.2rem;
  color: var(--paper-text-muted);
  margin: 0 0 1.5rem;
  line-height: 1.4;
}

.paper-meta {
  font-size: 0.95rem;
  color: var(--paper-text-muted);
  margin: 0;
}

/* ---------- TOC ----------
 * Defensive overrides: styles.css sets a global `nav { position: fixed; ... }`
 * that would also grab any <nav> in here, and other site rules may target
 * common element selectors. Reset everything explicitly so the TOC stays
 * inside the article column. */
.paper-toc {
  position: static;
  top: auto;
  left: auto;
  right: auto;
  bottom: auto;
  z-index: auto;
  width: auto;
  max-width: 100%;
  background: var(--paper-bg-alt);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: 1px solid var(--paper-border);
  border-left: 3px solid var(--paper-accent);
  box-shadow: none;
  padding: 1.5rem 1.75rem;
  margin: 0 0 3rem;
  border-radius: 4px;
}

.paper-toc .toctitle {
  font-size: 0.85rem;
  letter-spacing: 2px;
  font-weight: 600;
  color: var(--paper-accent-soft);
  text-transform: uppercase;
  margin: 0 0 0.85rem;
}

.paper-toc ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.paper-toc ul ul {
  padding-left: 1.25rem;
  margin: 0.35rem 0;
  font-size: 0.92em;
}

.paper-toc li {
  margin: 0.4rem 0;
  line-height: 1.45;
}

.paper-toc a {
  color: var(--paper-text);
  text-decoration: none;
  transition: color 0.15s;
}
.paper-toc a:hover { color: var(--paper-accent); }

/* ---------- body content ----------
 * styles.css applies `text-transform: uppercase` to all h1-h6 globally — we
 * have to override that explicitly for body headings to render properly. */
.paper-content h1,
.paper-content h2,
.paper-content h3,
.paper-content h4,
.paper-content h5,
.paper-content h6 {
  text-transform: none;
  letter-spacing: normal;
}

.paper-content h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: #FFFFFF;
  margin: 3.5rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--paper-border);
  letter-spacing: -0.005em;
}

.paper-content h2 {
  font-size: 1.35rem;
  font-weight: 600;
  color: #FFFFFF;
  margin: 2.5rem 0 0.85rem;
}

.paper-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--paper-accent-soft);
  margin: 2rem 0 0.65rem;
}

.paper-content p {
  margin: 0 0 1.2rem;
}

.paper-content strong { color: #FFFFFF; font-weight: 600; }
.paper-content em { color: var(--paper-text); }

.paper-content a {
  color: var(--paper-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.3);
  transition: border-color 0.15s;
}
.paper-content a:hover { border-bottom-color: var(--paper-accent); }

.paper-content ul,
.paper-content ol {
  margin: 0 0 1.4rem;
  padding-left: 1.5rem;
}
.paper-content li { margin: 0.4rem 0; }

.paper-content blockquote {
  border-left: 3px solid var(--paper-accent-soft);
  margin: 1.5rem 0;
  padding: 0.5rem 0 0.5rem 1.25rem;
  color: var(--paper-text-muted);
  font-style: italic;
}

/* ---------- tables ---------- */
.paper-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0 2rem;
  font-size: 0.92rem;
  background: var(--paper-bg-alt);
  border: 1px solid var(--paper-border);
}

.paper-content table th,
.paper-content table td {
  padding: 0.65rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--paper-border);
  vertical-align: top;
}

.paper-content table th {
  background: rgba(91, 156, 214, 0.08);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.paper-content table tr:last-child td { border-bottom: none; }
.paper-content table tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* responsive table — horizontal scroll on small screens */
.paper-content table {
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}
@media (min-width: 600px) {
  .paper-content table { display: table; white-space: normal; }
}

/* ---------- code (inline) ---------- */
.paper-content code {
  background: rgba(0, 229, 255, 0.1);
  color: var(--paper-accent);
  padding: 0.12em 0.4em;
  border-radius: 3px;
  font-family: 'SF Mono', Menlo, Monaco, Consolas, monospace;
  font-size: 0.88em;
}

/* anchor offsets so sticky header doesn't overlap on-page scroll */
.paper-content h1,
.paper-content h2,
.paper-content h3 {
  scroll-margin-top: 80px;
}

/* ---------- end CTA ---------- */
.paper-end-cta {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--paper-border);
  text-align: center;
}

.paper-download-btn-large {
  display: inline-block;
  background: var(--paper-accent);
  color: #0A0E1A;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 0.85rem 1.85rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.paper-download-btn-large:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 229, 255, 0.35);
}

.paper-end-meta,
.paper-end-citation {
  color: var(--paper-text-muted);
  font-size: 0.92rem;
  margin: 0.85rem 0;
}

.paper-end-meta a,
.paper-end-citation a {
  color: var(--paper-accent);
  text-decoration: none;
}
.paper-end-meta a:hover,
.paper-end-citation a:hover { text-decoration: underline; }

/* ---------- site footer ---------- */
.paper-site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--paper-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--paper-border);
}

.paper-site-footer a {
  color: var(--paper-text-muted);
  text-decoration: none;
  margin: 0 0.15rem;
}
.paper-site-footer a:hover { color: var(--paper-accent); }