@view-transition {
  navigation: auto;
}

body {
  box-sizing: border-box;
}

/* =========================
   TOKENS E BASE VISUAL
========================== */
:root {
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --text-primary: #0a0a0a;
  --text-secondary: #525252;
  --accent-primary: #0f172a;
  --accent-hover: #1e293b;
  --accent-secondary: #6366f1;
  --border-color: #e5e5e5;
  --card-bg: #ffffff;
  --premium-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #171717;
  --bg-glass: rgba(23, 23, 23, 0.85);
  --text-primary: #fafafa;
  --text-secondary: #a3a3a3;
  --accent-primary: #ffffff;
  --accent-hover: #f5f5f5;
  --accent-secondary: #818cf8;
  --border-color: #333333;
  --card-bg: #1a1a1a;
  --premium-bg: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 40px rgba(129, 140, 248, 0.3);
}

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

html, body {
  height: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  padding-left: 104px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

main {
  min-height: 100%;
}

section {
  padding: 80px 0;
}

/* =========================
   ACESSIBILIDADE
========================== */
.skip-links {
  position: absolute;
  top: -100px;
  left: 0;
  z-index: 9999;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 8px;
  background: var(--accent-primary);
  color: var(--bg-primary);
  padding: 12px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
  z-index: 10000;
}

.skip-link:focus {
  top: 8px;
  outline: 3px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* =========================
   SIDEBAR APRIMORADA
========================== */
/* Sidebar */
.sidebar {
  position: fixed;
  left: 16px;
  top: 16px;
  bottom: 16px;
  width: 72px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 16px 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.sidebar:hover {
  width: 240px;
  box-shadow: var(--shadow-glow);
}

.sidebar-logo {
  width: 44px;
  height: 44px;
  margin: 0 auto 16px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: var(--premium-bg);
  transition: transform 0.3s ease;
  border: none !important;
  box-shadow: 0 0 0 rgba(0,0,0,0) !important;
  outline: none !important;
}

.sidebar-logo:focus-visible {
  outline: 2px solid var(--accent-secondary);
}

.sidebar-logo-svg {
  width: 28px;
  height: 28px;
  display: block;
}

.sidebar-logo:hover {
  transform: scale(1.05);
}

.sidebar-logo span {
  font-weight: 700;
  font-size: 20px;
  color: #ffffff;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 14px;
  overflow-y: auto;
  scrollbar-width: none;
}

.sidebar-nav::-webkit-scrollbar {
  display: none;
}

.sidebar-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0 10px;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all 0.2s ease;
}

.sidebar:hover .sidebar-item {
  width: 208px;
}

.sidebar-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.sidebar-item:focus {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

.sidebar-item[aria-current="page"] {
  background: var(--bg-secondary);
  color: var(--accent-secondary);
}

.sidebar-item[aria-current="page"]::after {
  content: '';
  position: absolute;
  right: -14px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: var(--premium-bg);
  border-radius: 2px 0 0 2px;
}

.sidebar-item svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.sidebar-item:hover svg {
  transform: scale(1.1);
}

.sidebar-item-text {
  font-size: 15px;
  font-weight: 600;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  letter-spacing: -0.2px;
}

.sidebar:hover .sidebar-item-text {
  opacity: 1;
  visibility: visible;
}

.sidebar-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background: var(--premium-bg);
  color: white;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 8px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  box-shadow: 0 2px 6px rgba(102, 126, 234, 0.4);
  transition: all 0.2s ease;
}

.sidebar:hover .sidebar-badge {
  position: static;
  margin-left: auto;
}

.sidebar-badge.free {
  background: #10b981;
}

.sidebar-footer {
  padding: 0 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 8px;
}

.back-to-top,
.theme-toggle {
  width: 44px;
  height: 44px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  color: var(--text-primary);
}

.back-to-top:hover,
.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
}

.back-to-top:hover {
  transform: translateY(-2px);
}

.back-to-top:focus, .theme-toggle:focus {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* Botão mobile para abrir sidebar */
.mobile-sidebar-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  width: 44px;
  height: 44px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  font-size: 20px;
  z-index: 1100;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.mobile-sidebar-toggle:hover {
  border-color: var(--accent-secondary);
}

.mobile-sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-sidebar-overlay.active {
  opacity: 1;
  pointer-events: all;
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
  }

  .sidebar {
    transform: translateX(-120%);
    left: 16px;
    width: 260px;
  }

  .sidebar:hover {
    width: 260px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.open .sidebar-item {
    width: 228px;
  }

  .sidebar.open .sidebar-item-text {
    opacity: 1;
    visibility: visible;
  }

  .mobile-sidebar-toggle {
    display: flex;
  }
}

/* =========================
   BOTÕES E ELEMENTOS BASE
========================== */
.btn {
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: -0.2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-category {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-secondary);
}

.badge-soon {
  background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  color: #fff;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* =========================
   BLOG HERO
========================== */
.blog-hero {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  z-index: 1;
}

.blog-hero-inner {
  max-width: 260px;
}

.blog-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-secondary);
  margin-bottom: 12px;
}

.blog-hero h1 {
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 18px;
}

.blog-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.blog-hero-small {
  font-size: 14px;
  color: var(--text-secondary);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================
   BUSCA + CATEGORIAS
========================== */
.blog-filters {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 0 !important;
}

.search-section {
  padding: 0 !important;
  margin: 0 auto !important;
}

.search-bar {
  position: relative;
  margin-bottom: 12px !important;
}

.search-bar input {
  width: 100%;
  padding: 12px 16px 12px 42px !important;
  border-radius: 16px;
  border-radius: 12px !important;
  font-size: 14px !important;
  background: var(--card-bg);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent-secondary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  transform: translateY(-1px);
}

.search-bar input::placeholder {
  color: var(--text-secondary);
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  pointer-events: none;
  transition: all 0.3s ease;
}

.search-bar input:focus ~ .search-icon svg {
  stroke: var(--accent-secondary);
}

.search-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-secondary);
  fill: none;
  stroke-width: 2;
}

.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 6px !important;
  margin-bottom: 4px !important;
}

.category-chip {
  padding: 6px 12px !important;
  border-radius: 999px !important;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  font-size: 12px !important;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-chip::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--premium-bg);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-chip:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.category-chip.active {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.category-chip span {
  position: relative;
  z-index: 1;
}

/* =========================
   GRID DE ARTIGOS
========================== */
.blog-list {
  background: var(--bg-primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

@media (max-width: 900px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

.blog-card {
  background: var(--card-bg);
  border-radius: 24px;
  border: 1px solid var(--border-color);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--premium-bg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.3);
}

.blog-card:hover::before {
  transform: scaleX(1);
}

.blog-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-card h3 {
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.03em;
  transition: color 0.3s ease;
}

.blog-card:hover h3 {
  color: var(--accent-secondary);
}

.blog-description {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.blog-meta {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-card-footer {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.blog-card-footer .btn {
  flex-shrink: 0;
}

.btn-disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-disabled:hover {
  transform: none;
}

/* =========================
   CTA FINAL
========================== */
.blog-cta-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  position: relative;
}

.blog-cta-section::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 300px;
  background: radial-gradient(circle at bottom, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.blog-cta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  position: relative;
  z-index: 1;
}

@media (max-width: 900px) {
  .blog-cta-grid {
    grid-template-columns: 1fr;
  }
}

.blog-cta-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.blog-cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.blog-cta-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-secondary);
}

.blog-cta-card:hover::before {
  opacity: 1;
}

.blog-cta-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.blog-cta-card p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.blog-cta-card .btn {
  position: relative;
  z-index: 1;
}

/* =========================
   FOOTER
========================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 32px 0;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.site-footer a {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* =========================
   ANIMAÇÕES E MICROINTERAÇÕES
========================== */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.loading-shimmer {
  background: linear-gradient(
    90deg,
    var(--card-bg) 0%,
    var(--border-color) 50%,
    var(--card-bg) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Scroll suave */
html {
  scroll-behavior: smooth;
}

/* Estados de foco melhorados */
*:focus-visible {
  outline: 3px solid var(--accent-secondary);
  outline-offset: 2px;
  border-radius: 8px;
}

/* Responsividade adicional */
@media (max-width: 640px) {
  .blog-hero {
    padding: 32px 0 24px;
  }

  .blog-hero h1 {
    font-size: 24px;
  }

  .blog-hero p, .blog-hero-small {
    font-size: 14px;
  }

  .blog-eyebrow {
    font-size: 11px;
  }

  section {
    padding: 40px 0;
  }

  .blog-card {
    padding: 20px;
  }

  .blog-card h3 {
    font-size: 18px;
  }

  .blog-description {
    font-size: 14px;
  }

  .blog-meta {
    font-size: 12px;
  }

  .blog-card-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .blog-card-footer .btn {
    width: 100%;
  }

  .blog-cta-card {
    padding: 24px;
  }

  .blog-cta-card h3 {
    font-size: 18px;
  }

  .blog-cta-card p {
    font-size: 14px;
  }

  .blog-cta-card .btn {
    width: 100%;
  }

  .categories {
    gap: 8px;
  }

  .category-chip {
    font-size: 12px;
    padding: 8px 14px;
  }

  .search-bar input {
    font-size: 14px;
    padding: 14px 16px 14px 46px;
  }

  .site-footer {
    padding: 24px 0;
    font-size: 12px;
  }

  .site-footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 641px) and (max-width: 900px) {
  .blog-hero h1 {
    font-size: 32px;
  }

  .blog-card h3 {
    font-size: 20px;
  }

  section {
    padding: 60px 0;
  }
}

@media (min-width: 901px) and (max-width: 1200px) {
  .blog-grid {
    gap: 24px;
  }
}

/* Ajuste para telas muito pequenas */
@media (max-width: 360px) {
  .blog-hero h1 {
    font-size: 22px;
  }

  .blog-card {
    padding: 16px;
  }

  .blog-cta-card {
    padding: 20px;
  }

  .badge {
    font-size: 10px;
    padding: 5px 10px;
  }
}

/* Ajuste para telas muito grandes */
@media (min-width: 1600px) {
  .blog-hero h1 {
    font-size: 42px;
  }

  .blog-card h3 {
    font-size: 24px;
  }
}