/* ==========================================================================
   Júpiter Tech — Blog
   Folha de estilo compartilhada (índice + artigos).
   Tokens reaproveitados de index.html. Tema escuro premium, mobile-first.
   Sem dependências de runtime (não usa Tailwind CDN), para ser leve e rápido.
   ========================================================================== */

:root {
  --jupiter-black: #0A0A0B;
  --graphite: #1F2124;
  --surface: #141517;
  --surface-2: #17181B;
  --steel: #8A8D93;
  --mist: #F5F5F7;
  --signal: #2F6FED;
  --signal-soft: rgba(47, 111, 237, 0.12);
  --signal-strong: #1F56CC; /* fundo de botão: 5.9:1 com --mist (AA) */
  --signal-text: #6E9BF5;   /* texto/links azuis: >=6.3:1 nas superfícies escuras (AA) */
  --amber: #C8612C;
  --amber-soft: rgba(200, 97, 44, 0.12);
  --line-dark: #2A2C30;
  --line-faint: rgba(245, 245, 247, 0.08);

  --maxw: 1120px;
  --prose: 70ch;
  --radius: 14px;
  --radius-sm: 10px;

  --font-sans: 'Geist', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

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

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

body {
  margin: 0;
  background: var(--jupiter-black);
  color: var(--mist);
  font-family: var(--font-sans);
  font-feature-settings: 'cv11', 'ss01';
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--signal-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::selection { background: var(--signal); color: var(--mist); }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 20px; }

/* Acessibilidade: pular para conteúdo via teclado */
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

/* --------------------------------------------------------------------------
   Cabeçalho do site
   ------------------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 11, 0.82);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line-faint);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--mist); font-weight: 600; letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--amber); font-size: 20px; line-height: 1; }
.brand-name { font-size: 16px; }
.brand-dim { color: var(--steel); }

.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--steel); font-size: 14.5px; font-weight: 500; }
.site-nav a:hover { color: var(--mist); text-decoration: none; }
.nav-cta {
  color: var(--mist) !important;
  border: 1px solid var(--line-dark);
  padding: 7px 14px;
  border-radius: 999px;
  transition: border-color 0.2s, background 0.2s;
}
/* Hover invertido: botão-contorno (branco) -> fundo azul + texto branco. */
.nav-cta:hover { background: var(--signal-strong); border-color: var(--signal-strong); color: var(--mist) !important; }

@media (max-width: 640px) {
  .site-nav { gap: 14px; }
  .site-nav a:not(.nav-cta) { display: none; }
}

/* --------------------------------------------------------------------------
   Hero do índice
   ------------------------------------------------------------------------ */

.blog-hero {
  border-bottom: 1px solid var(--line-faint);
  padding: 72px 0 56px;
  background:
    radial-gradient(900px 380px at 78% -8%, var(--signal-soft), transparent 60%),
    radial-gradient(700px 320px at 8% 0%, var(--amber-soft), transparent 55%);
}
.hero-kicker {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 18px;
}
.hero-title {
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 20px;
  max-width: 16ch;
}
.hero-sub {
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--steel);
  max-width: 60ch;
  margin: 0 0 28px;
  line-height: 1.55;
}

.cat-bar { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--mist);
  background: var(--surface);
  border: 1px solid var(--line-dark);
  padding: 6px 12px;
  border-radius: 999px;
}
.chip-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel);
  background: rgba(245, 245, 247, 0.06);
  border-radius: 999px;
  padding: 1px 7px;
}

/* --------------------------------------------------------------------------
   Seções do índice
   ------------------------------------------------------------------------ */

.section { padding: 52px 20px; border-bottom: 1px solid var(--line-faint); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 26px; }
.section-title { font-size: 1.4rem; letter-spacing: -0.02em; font-weight: 600; margin: 0; }
.section-note { color: var(--steel); font-size: 14.5px; margin: 0; }

/* Cards em destaque */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.feat-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--mist);
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.feat-card:hover { border-color: var(--signal); transform: translateY(-2px); text-decoration: none; background: var(--surface-2); }
.feat-card--lead { grid-column: 1 / -1; }
.feat-card--lead .feat-title { font-size: clamp(1.5rem, 3.4vw, 2.1rem); }
.feat-cat {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--signal-text);
}
.feat-title { font-size: 1.35rem; line-height: 1.18; letter-spacing: -0.02em; font-weight: 600; margin: 0; }
.feat-desc { color: var(--steel); margin: 0; font-size: 15px; line-height: 1.5; }
.feat-meta { font-family: var(--font-mono); font-size: 12px; color: var(--steel); }
.feat-go { color: var(--signal-text); font-weight: 500; font-size: 14px; margin-top: auto; }

@media (max-width: 720px) {
  .feat-grid { grid-template-columns: 1fr; }
}

/* Lista de posts recentes */
.post-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.post-row {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 20px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--line-faint);
  color: var(--mist);
}
.post-list li:last-child .post-row { border-bottom: 1px solid var(--line-faint); }
.post-row:hover { text-decoration: none; }
.post-row:hover .post-row-title { color: var(--signal-text); }
.post-row-cat { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--steel); padding-top: 3px; }
.post-row-main { display: flex; flex-direction: column; gap: 6px; }
.post-row-title { font-size: 1.18rem; font-weight: 600; letter-spacing: -0.015em; line-height: 1.25; transition: color 0.2s; }
.post-row-desc { color: var(--steel); font-size: 14.5px; line-height: 1.5; }
.post-row-meta { font-family: var(--font-mono); font-size: 12px; color: var(--steel); white-space: nowrap; padding-top: 3px; }

@media (max-width: 720px) {
  .post-row { grid-template-columns: 1fr; gap: 8px; }
  .post-row-meta { padding-top: 0; }
}

/* Bloco de tese editorial */
.thesis {
  background: var(--surface);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: 32px;
}
.thesis-kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--amber); margin: 0 0 14px; }
.thesis-text { font-size: 1.05rem; line-height: 1.6; margin: 0 0 14px; max-width: 64ch; }
.thesis-text:last-child { margin-bottom: 0; }
.thesis-text strong { color: var(--mist); }

/* --------------------------------------------------------------------------
   CTA
   ------------------------------------------------------------------------ */

.cta { margin: 44px 0 8px; }
.cta--wide { margin: 0; }
.cta-inner {
  background: linear-gradient(135deg, var(--signal-soft), transparent 70%), var(--surface);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 30px;
}
.cta-kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--signal-text); margin: 0 0 10px; }
.cta-text { font-size: 1.2rem; line-height: 1.4; letter-spacing: -0.01em; margin: 0 0 20px; max-width: 50ch; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--signal-strong);
  color: var(--mist);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1.5px solid var(--signal-strong);
  transition: transform 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
}
/* Hover invertido: botão azul -> fundo branco + texto azul. */
.cta-btn:hover { text-decoration: none; transform: translateY(-1px); background: var(--mist); color: var(--signal-strong); border-color: var(--signal-strong); }

/* --------------------------------------------------------------------------
   Página de artigo
   ------------------------------------------------------------------------ */

.article { max-width: var(--prose); margin-inline: auto; padding: 40px 20px 8px; }

.breadcrumb { font-family: var(--font-mono); font-size: 12.5px; color: var(--steel); margin-bottom: 28px; }
.breadcrumb a { color: var(--steel); }
.breadcrumb a:hover { color: var(--mist); }
.breadcrumb span[aria-current] { color: var(--steel); }

.article-head { margin-bottom: 36px; padding-bottom: 28px; border-bottom: 1px solid var(--line-faint); }
.article-cat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--signal-text);
  margin-bottom: 18px;
}
.article-cat:hover { text-decoration: none; color: var(--mist); }
.article-title {
  font-size: clamp(1.9rem, 5.2vw, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 600;
  margin: 0 0 18px;
}
.article-lead { font-size: clamp(1.1rem, 2.6vw, 1.3rem); line-height: 1.5; color: var(--steel); margin: 0 0 24px; }
.article-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 14px; color: var(--steel); }
.meta-author { color: var(--mist); font-weight: 500; }
.meta-sep { color: var(--line-dark); }
.meta-read { font-family: var(--font-mono); font-size: 13px; }

/* Tipografia do corpo (prose) */
.prose { font-size: 1.075rem; line-height: 1.75; color: #E7E7EA; }
.prose > * { max-width: var(--prose); }
.prose h2 {
  font-size: clamp(1.4rem, 3.6vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 600;
  color: var(--mist);
  margin: 48px 0 16px;
  scroll-margin-top: 80px;
}
.prose h3 {
  font-size: clamp(1.15rem, 2.8vw, 1.35rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 600;
  color: var(--mist);
  margin: 34px 0 12px;
  scroll-margin-top: 80px;
}
.prose h4 { font-size: 1.08rem; font-weight: 600; color: var(--mist); margin: 26px 0 10px; }
.prose p { margin: 0 0 22px; }
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(47, 111, 237, 0.4); }
.prose a:hover { text-decoration-color: var(--signal); }
.prose strong { color: var(--mist); font-weight: 600; }
.prose em { color: var(--mist); }
.prose ul, .prose ol { margin: 0 0 22px; padding-left: 1.3em; }
.prose li { margin-bottom: 9px; }
.prose li::marker { color: var(--steel); }
.prose ul li::marker { color: var(--signal-text); }

.prose blockquote {
  margin: 30px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--amber);
}
.prose blockquote p {
  font-size: clamp(1.2rem, 3vw, 1.45rem);
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--mist);
  font-weight: 500;
  margin: 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--surface-2);
  border: 1px solid var(--line-dark);
  border-radius: 6px;
  padding: 2px 6px;
}
.prose pre {
  background: var(--surface-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 24px;
}
.prose pre code { background: none; border: none; padding: 0; font-size: 0.9rem; line-height: 1.55; }

.prose hr { border: none; border-top: 1px solid var(--line-faint); margin: 40px 0; }

/* Tags */
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 40px 0 0; }
.tags li { font-family: var(--font-mono); font-size: 12.5px; color: var(--steel); background: var(--surface); border: 1px solid var(--line-dark); border-radius: 999px; padding: 5px 11px; }

/* Relacionados */
.related { max-width: var(--maxw); margin: 56px auto 0; padding: 40px 20px 0; border-top: 1px solid var(--line-faint); }
.related-heading { font-size: 1.3rem; letter-spacing: -0.02em; font-weight: 600; margin: 0 0 22px; }
.related-list { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 0; margin: 0; }
.related-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--mist);
  height: 100%;
  transition: border-color 0.2s, transform 0.2s;
}
.related-card:hover { border-color: var(--signal); transform: translateY(-2px); text-decoration: none; }
.related-cat { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--signal-text); }
.related-title { font-size: 1.05rem; font-weight: 600; line-height: 1.25; letter-spacing: -0.015em; }
.related-desc { color: var(--steel); font-size: 13.5px; line-height: 1.45; }

@media (max-width: 720px) {
  .related-list { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Rodapé
   ------------------------------------------------------------------------ */

.site-footer { border-top: 1px solid var(--line-faint); margin-top: 64px; padding: 48px 0; }
.footer-inner { max-width: var(--maxw); margin-inline: auto; padding-inline: 20px; }
.footer-brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 600; margin-bottom: 14px; }
.footer-brand .brand-mark { color: var(--amber); }
.footer-tag { color: var(--steel); max-width: 56ch; margin: 0 0 20px; font-size: 15px; line-height: 1.55; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 18px; }
.footer-nav a { color: var(--steel); font-size: 14px; }
.footer-nav a:hover { color: var(--mist); }
.footer-legal { color: var(--steel); font-size: 13px; margin: 0; }

/* Conforto de leitura em telas largas já coberto por max-width da prose. */
@media (min-width: 1024px) {
  body { font-size: 17px; }
}

/* --------------------------------------------------------------------------
   Acessibilidade — skip link e resets de heading
   ------------------------------------------------------------------------ */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--signal-strong);
  color: var(--mist);
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  font-size: 14px;
  font-weight: 600;
}
.skip-link:focus { left: 0; text-decoration: none; }

/* Títulos de itens de lista promovidos a <h3>: zera margens herdadas do browser. */
.post-row-title,
.related-title { margin: 0; }