/* Camada — backendbr.digital | Academic Stone */

:root {
  --stone-50: #f7f5f2;
  --stone-100: #ede9e3;
  --stone-200: #ddd6cc;
  --stone-300: #c4b9ab;
  --stone-400: #9a8f82;
  --stone-500: #6e6459;
  --stone-600: #4a433c;
  --stone-700: #2e2a26;
  --stone-800: #1f1c19;
  --accent: #5c5348;
  --border: #c4b9ab;
  --max-width: 1140px;
  --space-xs: 12px;
  --space-sm: 24px;
  --space-md: 36px;
  --space-lg: 48px;
  --space-xl: 72px;
  --radius: 1px;
  --font-serif: "Libre Baskerville", "Georgia", "Times New Roman", serif;
  --font-sans: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.65;
  color: var(--stone-700);
  background: var(--stone-50);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--stone-700);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  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 */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0 var(--space-sm);
  background: var(--stone-50);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.logo {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--stone-800);
  text-transform: uppercase;
}

.logo-tagline {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone-400);
  text-align: center;
}

/* Nav — horizontal-underline */
.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm) var(--space-md);
  list-style: none;
}

.main-nav a {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--stone-600);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  border-bottom-color: var(--stone-700);
  color: var(--stone-800);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  padding: var(--space-xs);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone-600);
  border-radius: var(--radius);
}

/* Hero — text-only-lead */
.hero {
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.hero-lead {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 400;
  font-style: italic;
  color: var(--stone-500);
  max-width: 640px;
  margin: 0 auto var(--space-sm);
  line-height: 1.7;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--stone-800);
  max-width: 780px;
  margin: 0 auto;
}

.hero-meta {
  margin-top: var(--space-sm);
  font-size: 0.8rem;
  color: var(--stone-400);
  letter-spacing: 0.04em;
}

/* Featured story — homepage */
.featured-story {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.featured-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone-400);
  margin-bottom: var(--space-xs);
}

.featured-story h2 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.featured-story h2 a {
  text-decoration: none;
  color: var(--stone-800);
}

.featured-story h2 a:hover {
  color: var(--accent);
}

.featured-excerpt {
  font-size: 1.05rem;
  color: var(--stone-600);
  max-width: 720px;
  margin-bottom: var(--space-sm);
}

.featured-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
  font-size: 0.8rem;
  color: var(--stone-400);
}

/* Article list — numbered-list */
.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  color: var(--stone-800);
}

.article-list {
  list-style: none;
  counter-reset: article-counter;
}

.article-list li {
  counter-increment: article-counter;
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-sm);
  align-items: start;
}

.article-list li::before {
  content: counter(article-counter, decimal-leading-zero);
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--stone-300);
  line-height: 1;
}

.article-list h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
}

.article-list h3 a {
  text-decoration: none;
  color: var(--stone-800);
}

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

.article-list .list-excerpt {
  font-size: 0.95rem;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.article-list .list-meta {
  font-size: 0.75rem;
  color: var(--stone-400);
  letter-spacing: 0.03em;
}

/* Cards — bordered */
.card {
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--stone-50);
  border-radius: var(--radius);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

/* Tag — bracket-label */
.tag {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone-500);
}

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

/* Button — text-link-only */
.btn-link {
  display: inline;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stone-700);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  padding: 0;
}

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

/* Page sections */
.page-section {
  padding: var(--space-lg) 0;
}

.page-section.narrow {
  max-width: 720px;
}

.prose h1 {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  color: var(--stone-800);
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: var(--space-md) 0 var(--space-xs);
  color: var(--stone-800);
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin: var(--space-sm) 0 var(--space-xs);
  color: var(--stone-700);
}

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

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

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

.prose blockquote {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--stone-600);
  border-left: 2px solid var(--stone-300);
  padding: var(--space-xs) 0 var(--space-xs) var(--space-sm);
  margin: var(--space-md) 0;
}

/* 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 var(--space-xl);
}

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

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

.article-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.2;
  color: var(--stone-800);
  margin-bottom: var(--space-sm);
}

.article-header .article-meta {
  font-size: 0.8rem;
  color: var(--stone-400);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
}

.pull-quote {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 400;
  font-style: italic;
  line-height: 1.45;
  color: var(--stone-600);
  padding: var(--space-md) 0;
  margin: 0 0 var(--space-md);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pull-quote cite {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-style: normal;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stone-400);
  margin-top: var(--space-xs);
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin: var(--space-md) 0 var(--space-xs);
  color: var(--stone-800);
}

.article-body h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin: var(--space-sm) 0 var(--space-xs);
}

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

.article-body ul, .article-body ol {
  margin: 0 0 var(--space-sm) var(--space-sm);
}

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

/* Author — minimal-name-only */
.author-line {
  font-size: 0.85rem;
  color: var(--stone-500);
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
}

.author-line strong {
  font-weight: 600;
  color: var(--stone-700);
}

/* Sidebar — sticky-toc */
.article-sidebar {
  position: relative;
}

.toc {
  position: sticky;
  top: var(--space-sm);
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--stone-50);
  border-radius: var(--radius);
}

.toc-title {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone-400);
  margin-bottom: var(--space-xs);
}

.toc ol {
  list-style: none;
  counter-reset: toc-counter;
}

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

.toc li::before {
  content: counter(toc-counter) ". ";
  font-size: 0.75rem;
  color: var(--stone-300);
}

.toc a {
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--stone-600);
  line-height: 1.4;
}

.toc a:hover {
  color: var(--stone-800);
  text-decoration: underline;
}

/* Footer — editorial-masthead */
.site-footer {
  border-top: 2px solid var(--stone-700);
  padding: var(--space-lg) 0 var(--space-md);
  margin-top: var(--space-xl);
  background: var(--stone-100);
}

.footer-masthead {
  text-align: center;
  margin-bottom: var(--space-md);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stone-800);
  text-decoration: none;
}

.footer-tagline {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stone-400);
  margin-top: var(--space-xs);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  text-align: center;
}

.footer-col h4 {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

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

.footer-col li {
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--stone-600);
}

.footer-col a:hover {
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  font-size: 0.75rem;
  color: var(--stone-400);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
}

/* Cookie — inline-footer-note */
.cookie-note {
  display: none;
  padding: var(--space-xs) var(--space-sm);
  background: var(--stone-200);
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--stone-600);
  text-align: center;
}

.cookie-note.is-visible {
  display: block;
}

.cookie-note p {
  margin: 0;
}

/* Contact form */
.contact-form {
  max-width: 560px;
}

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--stone-500);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-xs);
  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;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: 1px solid var(--stone-500);
}

/* Articles archive */
.archive-item {
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.archive-item h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: var(--space-xs);
}

.archive-item h2 a {
  text-decoration: none;
  color: var(--stone-800);
}

.archive-item h2 a:hover {
  color: var(--accent);
}

.archive-item .archive-excerpt {
  color: var(--stone-500);
  margin-bottom: var(--space-xs);
}

.archive-item .archive-meta {
  font-size: 0.75rem;
  color: var(--stone-400);
}

/* 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; }
.mb-lg { margin-bottom: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }

/* Responsive */
@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    order: -1;
  }

  .toc {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    margin: 0 auto;
  }

  .main-nav {
    display: none;
    width: 100%;
  }

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

  .main-nav ul {
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
  }

  .article-list li {
    grid-template-columns: 36px 1fr;
  }
}