/* ============================================
   TOKENS
   ============================================ */
:root {
  --navy-900: #0B1E3D;
  --navy-800: #102A52;
  --blue-600: #2E6FF2;
  --blue-100: #E8EFFE;
  --orange-500: #FF6B1A;
  --orange-600: #E8590C;
  --paper: #F0F2F5;
  --paper-card: #FFFFFF;
  --ink-900: #111827;
  --ink-600: #4B5563;
  --ink-400: #6B7280;
  --line: #E5E7EB;

  --font-display: "Libre Baskerville", Georgia, "Times New Roman", serif;
  --font-body: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  /* Títulos longos (hero, artigo): sans legível. Serif só em títulos curtos. */
  --font-hero: var(--font-body);
  --font-article-title: var(--font-body);
  --blue-accent: #60A5FA;
  --hero-title-max: 22ch;

  --radius: 16px;
  --radius-sm: 8px;
  --max-width: 1120px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/*
  TIPOGRAFIA — ver BLOG.md e .cursor/rules/site-design.mdc
  - Títulos curtos (marca, seção, h2/h3 de artigo): Libre Baskerville (--font-display)
  - Texto, hero, título de artigo e cards: Open Sans (--font-body, --font-hero, --font-article-title)
  - Datas, prazos, breadcrumb: JetBrains Mono (--font-mono)
  - Sem gradiente em texto; destaque com --blue-accent
  - Não usar max-width em ch < 22 em títulos principais
*/

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; border-radius: var(--radius-sm); }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  background: rgba(11, 30, 61, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: white;
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  transition: transform 0.2s ease;
}

.brand:hover {
  transform: translateY(-1px);
}

.brand .brand-mark {
  color: var(--orange-500);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85rem;
  border: 1px solid rgba(255,107,26,0.4);
  background: rgba(255,107,26,0.1);
  border-radius: 6px;
  padding: 4px 8px;
  transition: all 0.2s ease;
}

.brand:hover .brand-mark {
  background: rgba(255,107,26,0.2);
  border-color: rgba(255,107,26,0.6);
}

.main-nav {
  display: flex;
  gap: 32px;
  font-size: 0.95rem;
  font-weight: 500;
}

.main-nav a {
  opacity: 0.8;
  transition: all 0.2s ease;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--orange-500);
  transition: width 0.2s ease;
}

.main-nav a:hover { opacity: 1; }
.main-nav a:hover::after { width: 100%; }

.main-nav a:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 4px;
  border-radius: 3px;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  background: var(--navy-900);
  color: white;
  padding: 96px 0 112px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,111,242,0.25), transparent 70%);
  filter: blur(40px);
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -5%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,107,26,0.15), transparent 70%);
  filter: blur(40px);
}

.hero .wrap { position: relative; z-index: 2; }

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--orange-500);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
  background: rgba(255,107,26,0.1);
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255,107,26,0.2);
}

.hero h1 {
  font-family: var(--font-hero);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  max-width: var(--hero-title-max);
  margin: 0 0 24px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.hero h1 em {
  font-style: normal;
  color: var(--blue-accent);
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  max-width: 50ch;
  margin: 0 0 40px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.btn-primary {
  background: var(--orange-500);
  color: white;
  box-shadow: 0 4px 14px rgba(255,107,26,0.3);
}
.btn-primary:hover { 
  transform: translateY(-2px); 
  box-shadow: 0 6px 20px rgba(255,107,26,0.4); 
  background: var(--orange-600);
}

.btn-ghost {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { 
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4); 
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 4px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================
   SECTION LABELS
   ============================================ */
.section {
  padding: 80px 0 40px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--line);
  padding-bottom: 16px;
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2rem;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--navy-900);
}

.section-head .count {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-400);
  background: var(--paper-card);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--line);
}

/* ============================================
   POST GRID / CARDS
   ============================================ */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 32px;
}

.post-card {
  background: var(--paper-card);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-600), var(--orange-500));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.post-card:hover::before {
  opacity: 1;
}

.post-card:focus-within {
  outline: 2px solid var(--orange-500);
  outline-offset: 2px;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-400);
}

.post-meta .pill {
  background: var(--blue-100);
  color: var(--blue-600);
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.post-card h3 {
  font-family: var(--font-body);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  color: var(--navy-900);
}

.post-card p {
  color: var(--ink-600);
  font-size: 1rem;
  margin: 0;
  flex-grow: 1;
  line-height: 1.6;
}

.post-card .read-more {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--blue-600);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.post-card .read-more::after {
  content: "→";
  transition: transform 0.2s ease;
}
.post-card:hover .read-more::after { transform: translateX(4px); }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--paper-card);
  border-top: 1px solid var(--line);
  padding: 48px 0;
  margin-top: 40px;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--navy-900);
  font-size: 1.2rem;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  color: var(--ink-600);
}

.footer-links a:hover {
  color: var(--orange-500);
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--ink-400);
  width: 100%;
  text-align: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

/* ============================================
   ARTICLE PAGE
   ============================================ */
.article-header {
  background: var(--navy-900);
  color: white;
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}

.article-header::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -50px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,111,242,0.2), transparent 70%);
  filter: blur(30px);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.breadcrumb a { 
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: white;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-header h1 {
  font-family: var(--font-article-title);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 28ch;
  margin: 0 0 24px;
  position: relative;
  z-index: 1;
}

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  position: relative;
  z-index: 1;
  align-items: center;
}

.article-meta .meta-divider {
  color: rgba(255,255,255,0.3);
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 40px;
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--ink-900);
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  margin: 56px 0 24px;
  letter-spacing: -0.01em;
  color: var(--navy-900);
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 40px 0 16px;
  color: var(--navy-800);
}

.article-body p {
  margin: 0 0 24px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-body li { 
  margin-bottom: 12px; 
}

.article-body li::marker {
  color: var(--orange-500);
}

.callout {
  background: var(--blue-100);
  border-left: 4px solid var(--blue-600);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 24px;
  margin: 40px 0;
  font-size: 1.05rem;
  color: var(--navy-900);
  box-shadow: var(--shadow-sm);
}

.callout strong { 
  color: var(--navy-900);
  display: block;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hero { padding: 64px 0 80px; }
  .section { padding: 56px 0 32px; }
  .article-body { font-size: 1.05rem; padding-top: 40px; }
}

@media (max-width: 640px) {
  .site-header .wrap { flex-direction: column; gap: 16px; }
  .main-nav { gap: 24px; width: 100%; justify-content: center; }
  .hero h1 { font-size: 2.2rem; }
  .post-grid { grid-template-columns: 1fr; }
  .site-footer .wrap { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; width: 100%; flex-wrap: wrap; }
}