/* Selva Aberta — independent analytical blog
   Palette: slate + âmbar | Typography: compact-news | Cards: bordered */

:root {
  --slate-950: #0f172a;
  --slate-900: #1e293b;
  --slate-800: #334155;
  --slate-700: #475569;
  --slate-600: #64748b;
  --slate-500: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --amber-700: #b45309;
  --amber-600: #d97706;
  --amber-500: #f59e0b;
  --amber-100: #fef3c7;
  --white: #ffffff;
  --font-sans: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
  --max-read: 38rem;
  --max-site: 68rem;
  --border: 1px solid var(--slate-200);
  --radius: 2px;
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.933rem;
  line-height: 1.55;
  color: var(--slate-900);
  background: var(--slate-50);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--amber-700);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover { color: var(--amber-600); }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--slate-950);
  letter-spacing: -0.02em;
}

h1 { font-size: 1.6rem; margin: 0 0 0.75rem; }
h2 { font-size: 1.2rem; margin: 1.75rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.25rem 0 0.4rem; }

p { margin: 0 0 0.85rem; }

ul, ol { margin: 0 0 0.85rem; padding-left: 1.25rem; }
li { margin-bottom: 0.35rem; }

/* —— Minimal header —— */
.site-header {
  background: var(--white);
  border-bottom: var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--slate-950);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.logo svg { width: 26px; height: 26px; flex-shrink: 0; }

.logo-tagline {
  display: block;
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--slate-600);
  letter-spacing: 0;
}

.main-nav {
  display: flex;
  gap: 1.1rem;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--slate-700);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.main-nav a:hover,
.main-nav a.active { color: var(--amber-700); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: var(--border);
  border-radius: var(--radius);
  padding: 6px 7px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--slate-800);
}

/* —— Layout —— */
.container {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container--narrow {
  max-width: var(--max-read);
}

main { padding: 1.5rem 0 3rem; }

.page-header {
  padding: 1.25rem 0 0.5rem;
  border-bottom: var(--border);
  margin-bottom: 1.5rem;
}

.page-header h1 { font-size: 1.45rem; }

.page-meta {
  font-size: 0.78rem;
  color: var(--slate-600);
  margin: 0;
}

/* —— Article stream (homepage) —— */
.stream-intro {
  max-width: var(--max-read);
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--slate-900);
}

.stream-intro .kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--amber-700);
  margin: 0 0 0.5rem;
}

.stream-intro h1 { font-size: 1.35rem; }

.article-stream {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.stream-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: var(--border);
  align-items: start;
}

.stream-item:first-child { border-top: var(--border); }

.stream-thumb {
  border: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--slate-100);
}

.stream-thumb img { width: 100%; height: 100%; object-fit: cover; }

.stream-body h2 {
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
}

.stream-body h2 a {
  color: var(--slate-950);
  text-decoration: none;
}

.stream-body h2 a:hover { color: var(--amber-700); }

.stream-meta {
  font-size: 0.75rem;
  color: var(--slate-600);
  margin-bottom: 0.4rem;
}

.stream-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--amber-700);
  border: 1px solid var(--amber-500);
  padding: 1px 5px;
  border-radius: var(--radius);
  margin-right: 0.4rem;
}

.stream-excerpt {
  font-size: 0.88rem;
  color: var(--slate-700);
  margin: 0;
  line-height: 1.5;
}

/* —— Bordered cards —— */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  border: var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.card-thumb {
  border-bottom: var(--border);
  aspect-ratio: 16/9;
  background: var(--slate-100);
}

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

.card-body { padding: 0.85rem 1rem 1rem; }

.card-body h3 {
  font-size: 0.95rem;
  margin: 0 0 0.35rem;
}

.card-body h3 a {
  color: var(--slate-950);
  text-decoration: none;
}

.card-body h3 a:hover { color: var(--amber-700); }

.card-meta {
  font-size: 0.72rem;
  color: var(--slate-600);
  margin-bottom: 0.4rem;
}

.card-excerpt {
  font-size: 0.85rem;
  color: var(--slate-700);
  margin: 0;
}

/* —— Authors —— */
.author-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.author-card {
  border: var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--white);
}

.author-card img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: var(--border);
  margin-bottom: 0.65rem;
}

.author-card h3 {
  font-size: 0.9rem;
  margin: 0 0 0.15rem;
}

.author-role {
  font-size: 0.72rem;
  color: var(--amber-700);
  font-family: var(--font-mono);
  margin: 0 0 0.5rem;
}

.author-bio {
  font-size: 0.82rem;
  color: var(--slate-700);
  margin: 0;
  line-height: 1.45;
}

/* —— Minimalist reading (article) —— */
.article-header {
  max-width: var(--max-read);
  margin: 0 auto 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--slate-900);
}

.article-header .kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--amber-700);
  margin: 0 0 0.5rem;
}

.article-header h1 { font-size: 1.5rem; }

.article-byline {
  font-size: 0.78rem;
  color: var(--slate-600);
  margin: 0.5rem 0 0;
}

.article-byline a { font-weight: 500; }

.article-content {
  max-width: var(--max-read);
  margin: 0 auto;
  font-size: 0.95rem;
  line-height: 1.65;
}

.article-content .lead {
  font-size: 1.02rem;
  color: var(--slate-800);
  border-left: 3px solid var(--amber-500);
  padding-left: 0.85rem;
  margin-bottom: 1.25rem;
}

.article-content blockquote {
  margin: 1.25rem 0;
  padding: 0.75rem 1rem;
  border: var(--border);
  border-left: 3px solid var(--amber-600);
  background: var(--white);
  font-size: 0.9rem;
  color: var(--slate-700);
}

.article-content .data-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--slate-100);
  border: var(--border);
  padding: 0.65rem 0.85rem;
  margin: 1rem 0;
  color: var(--slate-700);
}

.article-footer {
  max-width: var(--max-read);
  margin: 2rem auto 0;
  padding-top: 1rem;
  border-top: var(--border);
  font-size: 0.78rem;
  color: var(--slate-600);
}

/* —— Sidebar note block —— */
.note-block {
  border: var(--border);
  background: var(--white);
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
  font-size: 0.85rem;
}

.note-block strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate-600);
  margin-bottom: 0.4rem;
}

/* —— Contact form —— */
.contact-form {
  max-width: 28rem;
  margin: 1.25rem 0;
}

.form-group { margin-bottom: 0.85rem; }

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--slate-800);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--slate-900);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.btn {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--slate-900);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

.btn:hover { background: var(--slate-800); }

.form-note {
  font-size: 0.78rem;
  color: var(--slate-600);
  margin-top: 0.75rem;
}

/* —— Legal / prose pages —— */
.prose {
  max-width: var(--max-read);
  font-size: 0.9rem;
  line-height: 1.6;
}

.prose h2 { font-size: 1.05rem; margin-top: 1.5rem; }

/* —— Footer —— */
.site-footer {
  border-top: var(--border);
  background: var(--white);
  padding: 1.75rem 0;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
}

.footer-brand {
  font-size: 0.82rem;
  color: var(--slate-700);
}

.footer-brand strong {
  display: block;
  color: var(--slate-950);
  margin-bottom: 0.25rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.78rem;
}

.footer-links a {
  color: var(--slate-600);
  text-decoration: none;
}

.footer-links a:hover { color: var(--amber-700); }

.footer-copy {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  color: var(--slate-500);
  padding-top: 0.75rem;
  border-top: var(--border);
}

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

.text-muted { color: var(--slate-600); font-size: 0.82rem; }

.updated-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--slate-500);
}

/* —— Responsive —— */
@media (max-width: 640px) {
  .menu-toggle { display: flex; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1.25rem;
    gap: 0.5rem;
  }

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

  .site-header { position: relative; }

  .stream-item {
    grid-template-columns: 1fr;
  }

  .stream-thumb { max-width: 200px; }

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