/* ============================================================
 * QNFO CANONICAL PUBLICATION STYLESHEET — v1.0
 * ============================================================
 * SINGLE SOURCE OF TRUTH for ALL QNFO/QWAV publication pages.
 * Used by: Cloudflare Pages, Zenodo web views, local preview.
 * Complementary print rules included via @media print.
 *
 * Canonical path: G:\My Drive\prompts\releases\2026\papers.css
 * R2 backup:      qnfo/releases/2026/papers.css
 *
 * NEVER edit a deployed copy — update HERE and redeploy.
 * ============================================================ */

/* === CSS Custom Properties (Design Tokens) === */
:root {
  /* Typography */
  --font-body: Georgia, "Times New Roman", serif;
  --font-heading: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "Cascadia Code", "Fira Code", "JetBrains Mono", Consolas, monospace;
  --font-size-body: 1.1rem;
  --font-size-h1: 2.2rem;
  --font-size-h2: 1.6rem;
  --font-size-h3: 1.3rem;
  --font-size-small: 0.9rem;
  --line-height-body: 1.725;
  --line-height-heading: 1.3;

  /* Colors */
  --color-bg: #fefefe;
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-border: #e0e0e0;
  --color-accent: #2c3e50;
  --color-link: #1a5276;
  --color-link-hover: #2980b9;
  --color-badge-bg: #f0f4f8;
  --color-badge-text: #2c3e50;
  --color-blockquote: #f8f9fa;
  --color-blockquote-border: #cbd5e0;
  --color-code-bg: #f5f5f5;
  --color-table-border: #ddd;
  --color-table-header: #f0f4f8;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Layout */
  --max-width: 42rem;      /* ~670px — optimal reading width */
  --margin-horizontal: auto;
  --padding-body: 1.5rem;
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background: var(--color-bg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--padding-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  color: var(--color-accent);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-h1);
  margin-top: 0;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

h2 {
  font-size: var(--font-size-h2);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-xs);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

blockquote {
  background: var(--color-blockquote);
  border-left: 4px solid var(--color-blockquote-border);
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  font-style: italic;
  color: var(--color-text-secondary);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* === LISTS === */
ul, ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
}

li > ul, li > ol {
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

/* === CODE === */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-code-bg);
  padding: 0.15em 0.35em;
  border-radius: 3px;
  border: 1px solid var(--color-border);
}

pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  border: none;
  font-size: inherit;
}

/* === TABLES === */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: 0.95rem;
}

thead th {
  background: var(--color-table-header);
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid var(--color-table-border);
}

tbody td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-table-border);
}

tbody tr:hover {
  background: var(--color-blockquote);
}

/* === MATH (MathJax) === */
mjx-container {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
}

/* Inline math spacing */
mjx-container[jax="CHTML"][display="false"] {
  display: inline !important;
}

/* Display math — center with spacing */
mjx-container[jax="CHTML"][display="true"] {
  display: block !important;
  margin: var(--spacing-md) auto;
}

/* No-mathjax spans — inherit body style */
.no-mathjax {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
}

/* === IMAGES & FIGURES === */
img, svg {
  max-width: 100%;
  height: auto;
}

figure {
  margin: var(--spacing-lg) 0;
}

figure img {
  display: block;
  margin: 0 auto;
}

figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--spacing-sm);
}

/* === PUBLICATION HEADER === */
.publication-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
}

.publication-badge {
  display: inline-block;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3em 0.8em;
  border-radius: 3px;
  margin-bottom: var(--spacing-md);
}

.publication-header h1 {
  border-bottom: none;
  margin-bottom: var(--spacing-sm);
}

.publication-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-heading);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-md);
}

.publication-meta span {
  white-space: nowrap;
}

.doi-badge a {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--color-link);
  background: var(--color-badge-bg);
  padding: 0.15em 0.5em;
  border-radius: 3px;
  border-bottom: none;
}

.doi-badge a:hover {
  background: var(--color-link);
  color: #fff;
}

/* === ABSTRACT === */
.abstract {
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 3px solid var(--color-accent);
  background: var(--color-blockquote);
  font-style: italic;
}

.abstract p {
  margin-bottom: 0;
}

/* === ARTICLE BODY === */
.article-body {
  margin-top: var(--spacing-lg);
}

/* Section spacing */
.article-body section,
.article-body h2 + * {
  margin-top: var(--spacing-md);
}

/* Footnotes */
.footnote {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

.footnotes {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* === PUBLICATION FOOTER === */
.publication-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  text-align: center;
}

.publication-footer p {
  margin-bottom: var(--spacing-xs);
}

.publication-footer a {
  color: var(--color-text-secondary);
  border-bottom-color: var(--color-border);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  :root {
    --font-size-body: 1.0rem;
    --font-size-h1: 1.8rem;
    --font-size-h2: 1.35rem;
    --font-size-h3: 1.15rem;
    --padding-body: 1rem;
  }

  .publication-meta {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  pre {
    font-size: 0.8rem;
    padding: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-body: 0.95rem;
    --font-size-h1: 1.5rem;
    --font-size-h2: 1.2rem;
    --padding-body: 0.75rem;
  }
}

/* ============================================================
 * PRINT STYLESHEET (Complementary — embedded in same file)
 * ============================================================
 * Activates when: printing to paper, Save as PDF, reader mode.
 * Optimized for: A4/US Letter, black ink, readability.
 * ============================================================ */

@media print {
  /* Reset to print-friendly values */
  :root {
    --font-size-body: 11pt;
    --font-size-h1: 18pt;
    --font-size-h2: 14pt;
    --font-size-h3: 12pt;
    --font-size-small: 9pt;
    --line-height-body: 1.5;
    --color-bg: #fff;
    --color-text: #000;
    --color-accent: #000;
    --color-link: #000;
    --max-width: none;
    --padding-body: 0;
  }

  body {
    max-width: none;
    padding: 0;
    color: #000;
    background: #fff;
  }

  /* Hide non-content */
  .publication-badge,
  .doi-badge,
  noscript,
  script {
    display: none !important;
  }

  /* Page setup */
  @page {
    margin: 2cm 2.5cm;
    size: A4;
  }

  /* Links show URL */
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 8pt;
    color: #666;
  }

  /* Internal links and citations — no URL */
  a[href^="#"]::after {
    content: "";
  }

  /* Code blocks */
  pre, code {
    background: none;
    border: 1px solid #ccc;
    font-size: 9pt;
    white-space: pre-wrap;
    word-break: break-word;
  }

  /* Tables */
  table {
    font-size: 9pt;
  }

  thead th {
    background: none;
    border-bottom: 2px solid #000;
  }

  /* Avoid page breaks inside */
  h2, h3, h4, figure, table, .abstract, blockquote {
    break-inside: avoid;
  }

  /* Page breaks before major sections */
  h2 {
    break-before: auto;
    break-after: avoid;
  }

  /* Publication header compact */
  .publication-header {
    border-bottom: 1px solid #000;
    margin-bottom: 1cm;
    padding-bottom: 0.5cm;
  }

  .publication-meta {
    flex-direction: row;
    gap: 0.5cm;
  }

  /* Footer compact */
  .publication-footer {
    border-top: 1px solid #000;
    margin-top: 1cm;
    padding-top: 0.5cm;
  }

  /* Math — ensure visibility */
  mjx-container {
    color: #000 !important;
  }
}

/* ============================================================
 * DARK MODE (optional — respects system preference)
 * ============================================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a2e;
    --color-text: #e0e0e0;
    --color-text-secondary: #aaa;
    --color-border: #333;
    --color-accent: #8ab4f8;
    --color-link: #8ab4f8;
    --color-link-hover: #aecbfa;
    --color-badge-bg: #252540;
    --color-badge-text: #aecbfa;
    --color-blockquote: #222238;
    --color-blockquote-border: #444;
    --color-code-bg: #252540;
    --color-table-border: #333;
    --color-table-header: #252540;
  }

  .doi-badge a:hover {
    color: var(--color-bg);
  }
}

/* ============================================================
 * REDUCED MOTION
 * ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
 * END QNFO CANONICAL PUBLICATION STYLESHEET v1.0
 * Complementary web + print stylesheets in one file.
 * ============================================================ */