/* Neutro Brasil — minimal editorial stylesheet */

:root {
  --primary: #2D3142;
  --accent: #BFC0C0;
  --bg: #FFFFFF;
  --text: #1F2430;
  --muted: #8D99AE;
  --border: #E8EAED;
  --space-xs: 12px;
  --space-sm: 24px;
  --space-md: 36px;
  --space-lg: 48px;
  --space-xl: 72px;
  --radius: 0;
  --container: 720px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --line-height: 1.65;
  --line-height-tight: 1.25;
  --transition: 0.2s ease;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: var(--line-height);
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
}

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

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--muted);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  color: var(--primary);
  line-height: var(--line-height-tight);
  font-weight: 600;
  margin-top: 0;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.25rem); }
h2 { font-size: clamp(1.375rem, 3vw, 1.625rem); margin-bottom: var(--space-xs); }
h3 { font-size: 1.125rem; margin-bottom: var(--space-xs); }

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

ul, ol {
  margin: 0 0 var(--space-sm);
  padding-left: 1.25rem;
}

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

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

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--primary);
  color: var(--bg);
  padding: var(--space-xs) var(--space-sm);
  z-index: 200;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-xs);
  color: var(--bg);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-logo:hover {
  color: var(--primary);
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: var(--radius);
}

.menu-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: var(--space-sm);
}

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

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

.nav-list a {
  display: block;
  padding: var(--space-xs) 0;
  text-decoration: none;
  color: var(--text);
  border-bottom: 2px solid transparent;
  font-size: 0.9375rem;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Main content */
main {
  padding: var(--space-lg) 0 var(--space-xl);
  min-height: 50vh;
}

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

.page-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}

.page-lead {
  font-size: 1.1875rem;
  color: var(--muted);
  max-width: 38em;
}

/* Hero */
.hero {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

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

.hero-text {
  font-size: 1.1875rem;
  color: var(--muted);
  max-width: 36em;
}

/* Article feed — numbered list */
.feed-section {
  margin-bottom: var(--space-xl);
}

.section-heading {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
}

.article-feed {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: feed-counter;
}

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

.article-feed-item:first-child {
  padding-top: 0;
}

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

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

.article-feed-title {
  font-size: 1.25rem;
  color: var(--primary);
  margin: 0 0 var(--space-xs);
  font-weight: 600;
}

.article-feed-link:hover .article-feed-title {
  color: var(--muted);
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
}

.article-excerpt {
  margin: var(--space-xs) 0 0;
  color: var(--text);
  font-size: 0.9375rem;
}

/* Featured / related */
.featured-block,
.related-block {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

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

.related-list li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--border);
  margin: 0;
}

.related-list a {
  text-decoration: none;
  color: var(--primary);
  font-weight: 500;
}

/* Article reading */
.article-header {
  margin-bottom: var(--space-lg);
}

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

.article-body h2 {
  margin-top: var(--space-lg);
}

.article-body h3 {
  margin-top: var(--space-md);
}

.article-updated {
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.article-author {
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
  font-size: 0.9375rem;
}

.author-name {
  font-weight: 600;
  color: var(--primary);
}

/* Cards flat */
.info-card {
  padding: var(--space-sm);
  border: 1px solid var(--border);
  margin-bottom: var(--space-sm);
  border-radius: var(--radius);
}

.info-card h3 {
  margin-top: 0;
}

/* Contact */
.contact-email {
  font-family: var(--font-mono);
  font-size: 1rem;
  word-break: break-all;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

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

.footer-nav a {
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--muted);
}

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

.footer-copy {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0;
}

.cookie-notice {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0;
  padding-top: var(--space-xs);
  border-top: 1px solid var(--border);
  line-height: 1.5;
}

.cookie-notice[hidden] {
  display: none;
}

/* Prose utilities */
.prose-narrow {
  max-width: 38em;
}

.text-muted {
  color: var(--muted);
}

/* Abstract editorial decoration */
.editorial-figure {
  margin: var(--space-lg) 0;
  color: var(--accent);
}

/* Articles index */
.articles-index .article-feed-item {
  padding: var(--space-sm) 0;
}

/* Media queries */
@media (min-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }

  .main-nav {
    display: block;
    position: static;
    border: none;
    padding: 0;
    background: transparent;
  }

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

  .nav-list a {
    padding: var(--space-xs) 0;
  }

  .site-header {
    position: static;
  }

  .header-inner {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 1.125rem;
  }

  main {
    padding: var(--space-xl) 0;
  }
}