/* Neurologia Digital — academic-stone research publication */

:root {
  --stone-50: #f7f5f1;
  --stone-100: #ede9e1;
  --stone-200: #ddd6c8;
  --stone-300: #c4b9a6;
  --stone-400: #9a8f7c;
  --stone-500: #6b6356;
  --stone-600: #4a443c;
  --stone-700: #353029;
  --stone-800: #252119;
  --stone-900: #1a1714;

  --accent: #5c6b5a;
  --accent-light: #e8ede7;
  --border: #d4cfc4;
  --border-dark: #b8b0a0;

  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --space-xs: 12px;
  --space-sm: 24px;
  --space-md: 36px;
  --space-lg: 48px;
  --space-xl: 72px;

  --container: 1140px;
  --radius: 0;
  --header-height: 80px;
  --header-shrink: 56px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--stone-700);
  background: var(--stone-50);
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--stone-800);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  color: var(--stone-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: var(--space-xs); }

ul, ol {
  margin-bottom: var(--space-xs);
  padding-left: var(--space-sm);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-sm);
}

/* Header — centered-logo, sticky-shrink */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--stone-50);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
  transition: height var(--transition), box-shadow var(--transition);
}

.site-header.is-shrunk {
  height: var(--header-shrink);
  box-shadow: 0 2px 12px rgba(26, 23, 20, 0.06);
}

.site-header.is-shrunk .logo-text {
  font-size: 1.25rem;
}

.site-header.is-shrunk .logo-tagline {
  display: none;
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  position: relative;
}

.logo-link {
  text-decoration: none;
  text-align: center;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--stone-900);
  letter-spacing: 0.02em;
  transition: font-size var(--transition);
}

.logo-tagline {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--stone-500);
  margin-top: 2px;
}

.main-nav {
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-sm);
  padding: 0;
  margin: 0;
}

.nav-list a {
  font-size: 0.875rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--stone-600);
}

.nav-list a:hover,
.nav-list a.is-active {
  color: var(--stone-900);
  text-decoration: underline;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: 8px 12px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--stone-700);
  border-radius: var(--radius);
}

/* Bracket label tags */
.tag {
  display: inline-block;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.tag::before { content: "["; }
.tag::after { content: "]"; }

/* Text-link-only buttons */
.btn-link {
  display: inline;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--stone-800);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn-link:hover {
  color: var(--accent);
}

/* Hero — split-image-text */
.hero-split {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border);
}

.hero-split .grid-12 {
  align-items: center;
}

.hero-image {
  grid-column: span 6;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--stone-100);
}

.hero-image img,
.hero-image svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  grid-column: span 6;
  padding-left: var(--space-md);
}

.hero-content h1 {
  font-size: 2.75rem;
  margin-bottom: var(--space-xs);
}

.hero-meta {
  font-size: 0.8125rem;
  color: var(--stone-500);
  margin-bottom: var(--space-sm);
}

.hero-excerpt {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--stone-600);
  margin-bottom: var(--space-sm);
}

/* Bordered cards — vertical article list */
.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--stone-500);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
}

.article-feed {
  padding: var(--space-lg) 0;
}

.article-card {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-sm);
  padding: var(--space-sm);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border);
  background: var(--stone-50);
  transition: border-color var(--transition);
}

.article-card:hover {
  border-color: var(--border-dark);
}

.article-card .card-thumb {
  grid-column: span 4;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--stone-100);
}

.article-card .card-thumb img,
.article-card .card-thumb svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card .card-body {
  grid-column: span 8;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.article-card h3 {
  font-size: 1.375rem;
  margin-bottom: var(--space-xs);
}

.article-card h3 a {
  text-decoration: none;
  color: var(--stone-900);
}

.article-card h3 a:hover {
  color: var(--accent);
}

.card-meta {
  font-size: 0.8125rem;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.card-excerpt {
  color: var(--stone-600);
  font-size: 0.9375rem;
}

/* Teaser cards — shorter */
.article-card.is-teaser .card-thumb {
  display: none;
}

.article-card.is-teaser {
  grid-template-columns: 1fr;
}

.article-card.is-teaser .card-body {
  grid-column: span 12;
}

.article-card.is-teaser h3 {
  font-size: 1.125rem;
}

/* Page layouts */
.page-header {
  padding: var(--space-lg) 0 var(--space-md);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--space-xs);
}

.page-header .lead {
  font-size: 1.125rem;
  color: var(--stone-600);
  max-width: 640px;
  margin: 0 auto;
}

.page-content {
  padding: var(--space-lg) 0;
}

.page-content .prose {
  max-width: 720px;
  margin: 0 auto;
}

.prose h2 {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.prose h3 {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-xs);
}

/* Article layout — pull-quote-led, sticky TOC */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
}

.article-main {
  min-width: 0;
}

.article-header {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.article-header h1 {
  font-size: 2.25rem;
  margin-bottom: var(--space-xs);
}

.article-hero-img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: var(--space-md);
  background: var(--stone-100);
}

.article-hero-img img,
.article-hero-img svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Pull quote — leads article */
.pull-quote {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  line-height: 1.4;
  color: var(--stone-800);
  border-left: 3px solid var(--stone-400);
  padding: var(--space-sm) 0 var(--space-sm) var(--space-sm);
  margin: 0 0 var(--space-md);
  font-style: italic;
}

.pull-quote cite {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-style: normal;
  color: var(--stone-500);
  margin-top: var(--space-xs);
  letter-spacing: 0.05em;
}

.article-body p {
  margin-bottom: var(--space-sm);
}

.article-body h2 {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

/* Sticky TOC sidebar */
.article-sidebar {
  position: relative;
}

.toc-box {
  position: sticky;
  top: calc(var(--header-shrink) + var(--space-sm));
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--stone-50);
}

.toc-box h4 {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.toc-list {
  list-style: none;
  padding: 0;
}

.toc-list li {
  margin-bottom: 8px;
}

.toc-list a {
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--stone-600);
  line-height: 1.4;
}

.toc-list a:hover,
.toc-list a.is-active {
  color: var(--stone-900);
  text-decoration: underline;
}

/* Author sidebar bio box */
.author-bio {
  margin-top: var(--space-sm);
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--stone-100);
}

.author-bio h4 {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.author-bio-inner {
  display: flex;
  gap: var(--space-xs);
  align-items: flex-start;
}

.author-avatar {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border: 1px solid var(--border);
  background: var(--stone-50);
  overflow: hidden;
}

.author-avatar svg {
  width: 100%;
  height: 100%;
}

.author-bio .name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--stone-900);
}

.author-bio .role {
  font-size: 0.75rem;
  color: var(--stone-500);
  margin-bottom: 4px;
}

.author-bio p {
  font-size: 0.8125rem;
  line-height: 1.5;
  margin: 0;
  color: var(--stone-600);
}

/* Contact form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-sm);
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--stone-600);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--stone-50);
  color: var(--stone-700);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-info {
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--stone-100);
}

.contact-info h3 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

/* Footer — editorial masthead */
.site-footer {
  border-top: 2px solid var(--stone-800);
  background: var(--stone-100);
  padding: var(--space-lg) 0 var(--space-md);
  margin-top: var(--space-xl);
}

.footer-masthead {
  text-align: center;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
}

.footer-masthead .logo-text,
.footer-masthead .footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--stone-900);
}

.footer-masthead .tagline,
.footer-masthead .footer-tagline {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--stone-500);
  margin-top: 4px;
}

.footer-masthead .established {
  font-size: 0.8125rem;
  color: var(--stone-500);
  margin-top: var(--space-xs);
  font-style: italic;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col li {
  margin-bottom: 6px;
}

.footer-col a {
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--stone-600);
}

.footer-col a:hover {
  text-decoration: underline;
  color: var(--stone-900);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--stone-500);
}

/* Cookie bottom bar */
.cookie-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background: var(--stone-800);
  color: var(--stone-100);
  padding: var(--space-sm);
  transform: translateY(100%);
  transition: transform var(--transition);
  border-top: 1px solid var(--stone-600);
}

.cookie-bar.is-visible {
  transform: translateY(0);
}

.cookie-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.cookie-bar p {
  font-size: 0.875rem;
  margin: 0;
  flex: 1;
  min-width: 240px;
}

.cookie-bar a {
  color: var(--stone-200);
}

.cookie-bar .btn-link {
  color: var(--stone-50);
  flex-shrink: 0;
}

.cookie-bar .btn-link:hover {
  color: var(--stone-200);
}

/* Articles listing page */
.articles-grid {
  padding: var(--space-lg) 0;
}

/* Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.text-center { text-align: center; }

/* Responsive */
@media (max-width: 960px) {
  .hero-split .grid-12 {
    grid-template-columns: 1fr;
  }

  .hero-image,
  .hero-content {
    grid-column: span 12;
  }

  .hero-content {
    padding-left: 0;
    padding-top: var(--space-sm);
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    order: -1;
  }

  .toc-box {
    position: static;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .article-card .card-thumb,
  .article-card .card-body {
    grid-column: span 12;
  }
}

@media (max-width: 720px) {
  h1 { font-size: 2rem; }

  .hero-content h1 {
    font-size: 2rem;
  }

  .menu-toggle {
    display: block;
    position: absolute;
    left: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--stone-50);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    z-index: 999;
  }

  .main-nav {
    top: var(--header-height);
  }

  .site-header.is-shrunk .main-nav {
    top: var(--header-shrink);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--space-sm);
    gap: var(--space-xs);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .pull-quote {
    font-size: 1.375rem;
  }
}