/* Opinião — academic-stone research publication */
:root {
  --color-bg: #f5f0eb;
  --color-text: #3d3d3d;
  --color-accent: #8b7355;
  --color-muted: #d4c4b0;
  --color-border: #d4c4b0;
  --color-surface: #faf8f5;

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

  --container: 960px;
  --radius: 0;

  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;

  --line-height: 1.65;
  --transition: 0.2s ease;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-serif);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-height);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-xs);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 var(--space-sm); }

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

/* Mono accent labels */
.label-mono,
.tag,
.meta-label,
.toc-title,
.cookie-notice p {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Bracket tags */
.tag,
.category-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
}

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

/* Cookie top-strip */
.cookie-notice {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-xs) var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  transform: translateY(-100%);
  transition: transform 0.35s ease;
}

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

.cookie-notice p {
  margin: 0;
  color: var(--color-muted);
  text-align: center;
}

.cookie-notice a { color: var(--color-bg); }

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--color-muted);
  color: var(--color-bg);
  padding: 8px 16px;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.btn-ghost:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

/* Header — centered logo */
.site-header {
  padding: var(--space-md) 0 var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.site-header .logo {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-header .tagline {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: 6px;
}

.nav-toggle {
  display: none;
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: none;
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--color-text);
}

.site-header .container { position: relative; }

/* Category tags row nav */
.category-nav {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.category-nav .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.category-nav a {
  text-decoration: none;
}

.category-nav a:hover,
.category-nav a.is-active {
  color: var(--color-text);
}

/* Main nav */
.main-nav {
  padding: var(--space-xs) 0;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
}

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

/* Hero — stacked headlines no image */
.hero {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-stacked h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-xs);
}

.hero-stacked .hero-sub {
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: 400;
  margin-bottom: var(--space-sm);
}

.hero-stacked .hero-lead {
  font-size: 1.05rem;
  max-width: 640px;
  color: var(--color-text);
}

/* 8-col asymmetric grid */
.grid-8 {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--space-sm);
}

.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }

/* Numbered article list */
.article-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: article-counter;
}

.article-list li {
  counter-increment: article-counter;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.article-list li:first-child { padding-top: 0; }

.article-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.article-card::before {
  content: counter(article-counter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-xs);
}

.article-card h2 {
  font-size: 1.35rem;
  color: var(--color-text);
  transition: color var(--transition);
}

.article-card:hover h2 { color: var(--color-accent); }

.article-card .excerpt {
  font-size: 0.95rem;
  color: var(--color-text);
  margin: var(--space-xs) 0;
  opacity: 0.85;
}

.article-card .meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Stacked text below cards */
.card-stack {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.card-stack .card-body { padding-top: var(--space-xs); }

/* Section spacing */
.section {
  padding: var(--space-lg) 0;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

/* Article page — narrow reading + sticky TOC */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  align-items: start;
}

.article-main {
  max-width: 620px;
}

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

.article-header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.article-body h2 {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  font-size: 1.3rem;
}

.article-body h3 {
  margin-top: var(--space-sm);
  font-size: 1.1rem;
}

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

.article-body blockquote {
  margin: var(--space-sm) 0;
  padding-left: var(--space-sm);
  border-left: 3px solid var(--color-accent);
  font-style: italic;
  color: var(--color-text);
}

.references {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.references h2 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.references ol {
  padding-left: var(--space-sm);
  font-size: 0.9rem;
}

.references li { margin-bottom: var(--space-xs); }

/* Sticky TOC sidebar */
.article-sidebar {
  position: sticky;
  top: var(--space-sm);
}

.toc {
  border: 1px solid var(--color-border);
  padding: var(--space-sm);
  background: var(--color-surface);
}

.toc-title {
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  display: block;
}

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

.toc li { margin-bottom: 6px; }

.toc a {
  font-size: 0.8rem;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-sans);
  display: block;
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 8px;
  transition: border-color var(--transition), color var(--transition);
}

.toc a:hover,
.toc a.is-active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

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

.author-box .label-mono {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--color-accent);
}

.author-box h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.author-box p {
  font-size: 0.85rem;
  margin: 0;
  line-height: 1.5;
}

/* Page content */
.page-content {
  padding: var(--space-lg) 0;
  max-width: 680px;
}

.page-content.wide { max-width: var(--container); }

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

.prose ul, .prose ol {
  margin: 0 0 var(--space-sm);
  padding-left: var(--space-md);
}

.prose li { margin-bottom: 6px; }

/* Contact form */
.contact-form {
  max-width: 520px;
}

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

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--color-accent);
}

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

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

button[type="submit"] {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 12px 24px;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

button[type="submit"]:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* Footer — minimal single */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  margin-top: var(--space-xl);
  text-align: center;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-xs);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.site-footer nav a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
}

.site-footer nav a:hover { color: var(--color-accent); }

.site-footer .copyright {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text);
  opacity: 0.7;
}

/* Articles index */
.articles-grid .article-list li { padding: var(--space-sm) 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; }

.mt-lg { margin-top: var(--space-lg); }

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    display: none;
    padding: var(--space-sm) 0;
  }

  .main-nav.is-open { display: block; }

  .main-nav ul {
    flex-direction: column;
    gap: var(--space-xs);
  }

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

  .article-sidebar {
    position: static;
    order: -1;
  }

  .hero-stacked h1 { font-size: 1.75rem; }

  .col-5, .col-6 { grid-column: span 8; }

  h1 { font-size: 1.75rem; }
}

@media (min-width: 769px) {
  body.has-cookie .site-header { margin-top: 44px; }
}