/* Rendimento Editorial — academic-stone research publication */
:root {
  --stone-50: #f7f5f2;
  --stone-100: #ebe7e0;
  --stone-200: #d4cdc2;
  --stone-300: #b5ab9a;
  --stone-400: #8f8270;
  --stone-500: #6b5f50;
  --stone-600: #524839;
  --stone-700: #3d3529;
  --stone-800: #2a241c;
  --stone-900: #1a1612;
  --accent: #5c4a3a;
  --accent-light: #7a6552;
  --text: var(--stone-800);
  --text-muted: var(--stone-500);
  --bg: var(--stone-50);
  --bg-card: #fff;
  --border: var(--stone-200);
  --serif: "Georgia", "Times New Roman", serif;
  --sans: "Helvetica Neue", Arial, sans-serif;
  --space-xs: 12px;
  --space-sm: 24px;
  --space-md: 36px;
  --space-lg: 48px;
  --space-xl: 72px;
  --container: 1140px;
  --header-height: 88px;
  --header-shrink: 60px;
  --radius: 0;
  --transition: 0.25s ease;
}

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

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

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover { color: var(--stone-700); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.25;
  color: var(--stone-900);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; margin-bottom: var(--space-sm); }
h3 { font-size: 1.25rem; margin-bottom: var(--space-xs); }

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

.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: 100;
  background: var(--bg);
  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, 22, 18, 0.06);
}

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

.site-logo {
  font-family: var(--serif);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--stone-900);
  text-decoration: none;
  transition: font-size var(--transition);
}

.site-header.is-shrunk .site-logo { font-size: 1.2rem; }

.site-tagline {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 4px;
  transition: opacity var(--transition), max-height var(--transition);
}

.site-header.is-shrunk .site-tagline {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  margin: 0;
}

.nav-toggle {
  display: none;
  position: absolute;
  right: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 1px solid var(--border);
  padding: 8px 12px;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
}

.site-nav {
  margin-top: var(--space-xs);
  transition: margin var(--transition);
}

.site-header.is-shrunk .site-nav { margin-top: 0; }

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.site-nav a {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-muted);
}

.site-nav a:hover,
.site-nav a.is-active { color: var(--stone-900); }

/* Bracket labels */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.tag::before { content: "["; margin-right: 2px; }
.tag::after { content: "]"; margin-left: 2px; }

/* Text-link buttons */
.btn-link {
  display: inline;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
  padding: 0;
}

.btn-link:hover { color: var(--stone-700); }

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

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

.hero-split__image {
  grid-column: 1 / 7;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--stone-100);
}

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

.hero-split__content {
  grid-column: 7 / 13;
  padding-left: var(--space-md);
}

.hero-split__content h1 { margin-bottom: var(--space-sm); }
.hero-split__meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.hero-split__excerpt {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--stone-600);
  margin-bottom: var(--space-md);
}

/* Cards — bordered vertical list */
.card-list { padding: var(--space-xl) 0; }

.card-list__header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.card-list__header h2 { margin-bottom: var(--space-xs); }

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

.card:hover { border-color: var(--stone-300); }

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

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

.card__body {
  grid-column: 4 / 13;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.card__meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

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

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

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

.card__excerpt {
  font-size: 0.95rem;
  color: var(--stone-600);
  margin-bottom: var(--space-xs);
}

/* 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 p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

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

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

.prose h2 { margin-top: var(--space-md); }
.prose h2:first-child { margin-top: 0; }
.prose ul, .prose ol { margin: var(--space-sm) 0 var(--space-sm) var(--space-md); }
.prose li { margin-bottom: var(--space-xs); }

/* Article layout — pull quote led, sticky TOC */
.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  gap: var(--space-lg);
  padding: var(--space-lg) 0 var(--space-xl);
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--space-sm);
  padding-right: var(--space-sm);
}

.article-toc {
  position: sticky;
  top: calc(var(--header-height) + var(--space-sm));
  align-self: start;
  font-size: 0.8rem;
}

.site-header.is-shrunk ~ main .article-toc,
.site-header.is-shrunk + main .article-toc {
  top: calc(var(--header-shrink) + var(--space-sm));
}

.article-toc h2 {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
  font-family: var(--sans);
}

.article-toc ul { list-style: none; }

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

.article-toc a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.4;
  display: block;
  padding-left: var(--space-xs);
  border-left: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}

.article-toc a:hover,
.article-toc a.is-active {
  color: var(--stone-900);
  border-left-color: var(--accent);
}

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

.article-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.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 — led article style */
.pull-quote {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.45;
  color: var(--stone-700);
  border-left: 3px solid var(--accent);
  padding: var(--space-sm) 0 var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  font-style: italic;
}

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

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

.article-body h2 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  scroll-margin-top: calc(var(--header-height) + var(--space-sm));
}

/* Author sidebar bio box */
.author-box {
  position: sticky;
  top: calc(var(--header-height) + var(--space-sm));
  align-self: start;
  border: 1px solid var(--border);
  padding: var(--space-sm);
  background: var(--bg-card);
}

.author-box__avatar {
  width: 80px;
  height: 80px;
  border: 1px solid var(--border);
  margin-bottom: var(--space-xs);
  background: var(--stone-100);
  overflow: hidden;
}

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

.author-box h3 {
  font-size: 0.95rem;
  font-family: var(--serif);
  margin-bottom: 4px;
}

.author-box__role {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.author-box p {
  font-size: 0.85rem;
  color: var(--stone-600);
  line-height: 1.55;
}

/* Footer — editorial masthead */
.site-footer {
  margin-top: auto;
  border-top: 2px solid var(--stone-900);
  background: var(--stone-100);
  padding: var(--space-lg) 0 var(--space-md);
}

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

.footer-masthead__logo {
  font-family: var(--serif);
  font-size: 1.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stone-900);
  margin-bottom: var(--space-xs);
}

.footer-masthead__tagline {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

.footer-col h4 {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

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

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

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Contact form */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
}

.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(--text-muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-xs);
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text);
  border-radius: var(--radius);
}

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

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Cookie bar */
.cookie-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--stone-800);
  color: var(--stone-100);
  padding: var(--space-sm);
  z-index: 200;
  transform: translateY(100%);
  transition: transform var(--transition);
}

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

.cookie-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.cookie-bar p {
  font-size: 0.85rem;
  margin: 0;
  flex: 1;
  min-width: 200px;
}

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

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

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

/* Responsive */
@media (max-width: 960px) {
  .hero-split__image { grid-column: 1 / 13; margin-bottom: var(--space-sm); }
  .hero-split__content { grid-column: 1 / 13; padding-left: 0; }
  .card__thumb { grid-column: 1 / 5; }
  .card__body { grid-column: 5 / 13; }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-toc {
    position: static;
    order: -1;
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-sm);
  }
  .author-box {
    position: static;
    margin-top: var(--space-lg);
  }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
}

@media (max-width: 640px) {
  h1 { font-size: 1.85rem; }
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: var(--space-sm);
    margin-top: 0;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: var(--space-xs); align-items: center; }
  .card { grid-template-columns: 1fr; }
  .card__thumb,
  .card__body { grid-column: 1 / -1; }
  .pull-quote { font-size: 1.25rem; padding-left: var(--space-sm); }
  .hero-split { padding: var(--space-lg) 0; }
  .cookie-bar .container { flex-direction: column; text-align: center; }
}