/* ===================================
   CSS Melhorado para Página Blog
   Instituto Fab Lab Brasil
   =================================== */

/* ===================================
   CSS Custom Properties (Variáveis)
   =================================== */
:root {
  /* Cores principais */
  --primary-color: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3385ff;
  --secondary-color: #ff6b35;
  --accent-color: #00d4aa;
  
  /* Gradientes */
  --primary-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  --secondary-gradient: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
  --hero-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--secondary-color) 100%);
  
  /* Cores de texto */
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;
  
  /* Cores de fundo */
  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-tertiary: #edf2f7;
  --bg-dark: #1a202c;
  
  /* Cores de estado */
  --success-color: #48bb78;
  --warning-color: #ed8936;
  --error-color: #f56565;
  --info-color: #4299e1;
  
  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
  
  /* Tipografia */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-mono: 'Fira Code', 'Monaco', 'Cascadia Code', monospace;
  
  /* Tamanhos de fonte */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Espaçamentos */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transições */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Breakpoints (para uso em JS) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ===================================
   Reset e Base Styles
   =================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ===================================
   Utilitários de Acessibilidade
   =================================== */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  padding: var(--space-2) var(--space-4) !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
  background-color: var(--primary-color) !important;
  color: white !important;
  text-decoration: none !important;
  border-radius: var(--radius-md) !important;
  z-index: var(--z-tooltip) !important;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: var(--z-tooltip);
  padding: var(--space-3) var(--space-6);
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  transform: translateY(-100%);
  transition: transform var(--transition-fast);
}

.skip-to-content:focus {
  transform: translateY(0);
}

/* ===================================
   Foco visível para navegação por teclado
   =================================== */
.keyboard-nav *:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ===================================
   Estilos específicos da página Blog
   =================================== */
.page-blog {
  --blog-card-bg: var(--bg-primary);
  --blog-hover-transform: translateY(-8px);
}

/* ===================================
   Hero Section
   =================================== */
.page-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background: var(--hero-gradient);
  overflow: hidden;
  isolation: isolate;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  z-index: -2;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.2;
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  background: linear-gradient(45deg, #ffffff, #f7fafc, #e2e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.hero-description {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: var(--space-6);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  list-style: none;
  font-size: var(--text-sm);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: var(--space-2);
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: white;
}

.breadcrumb li[aria-current="page"] {
  color: white;
  font-weight: 600;
}

/* ===================================
   Featured Post
   =================================== */
.section-featured-post {
  padding: var(--space-20) 0;
  background: var(--bg-secondary);
}

.featured-post {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  background: var(--bg-primary);
  border-radius: var(--radius-3xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.featured-post:hover {
  transform: translateY(-4px);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.15);
}

.featured-post .post-image {
  position: relative;
  height: 400px;
  overflow: hidden;
}

.featured-post .post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured-post:hover .post-image img {
  transform: scale(1.05);
}

.featured-post .post-category {
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  z-index: 2;
}

.category-tag {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-color);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.featured-post .post-content {
  padding: var(--space-8);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.featured-post h3 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.featured-post h3 a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.featured-post h3 a:hover {
  color: var(--primary-color);
}

.featured-post p {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

/* ===================================
   Botões
   =================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--primary-gradient);
  color: white;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.read-more:hover {
  gap: var(--space-3);
  color: var(--primary-dark);
}

/* ===================================
   Categories Section
   =================================== */
.section-categories {
  padding: var(--space-20) 0;
  background: var(--bg-primary);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
}

.category-card {
  background: var(--bg-primary);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid rgba(0, 0, 0, 0.05);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.category-card:hover::before {
  opacity: 0.05;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.category-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  background: var(--primary-gradient);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: white;
  transition: transform var(--transition-normal);
}

.category-card:hover .category-icon {
  transform: scale(1.1) rotate(5deg);
}

.category-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.category-card p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.post-count {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
}

/* ===================================
   Recent Posts Section
   =================================== */
.section-recent-posts {
  padding: var(--space-20) 0;
  background: var(--bg-secondary);
}

.blog-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===================================
   Posts Grid
   =================================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.post-card {
  background: var(--blog-card-bg);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.post-card:hover {
  transform: var(--blog-hover-transform);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.post-card .post-image {
  position: relative;
  height: 240px;
  overflow: hidden;
}

.post-card .post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.post-card:hover .post-image img {
  transform: scale(1.1);
}

.post-card .post-category {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 2;
}

.post-card .post-content {
  padding: var(--space-6);
}

.post-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--space-3);
}

.post-card h3 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.post-card h3 a:hover {
  color: var(--primary-color);
}

.post-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.post-card .post-meta {
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}

/* ===================================
   Sidebar
   =================================== */
.blog-sidebar {
  position: sticky;
  top: calc(var(--space-20) + 80px);
}

.sidebar-widget {
  background: var(--bg-primary);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-8);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.widget-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  position: relative;
  padding-bottom: var(--space-3);
}

.widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: var(--radius-sm);
}

/* Search Widget */
.search-widget {
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-12) var(--space-4) var(--space-4);
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  background: var(--bg-secondary);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
  background: var(--bg-primary);
}

.search-btn {
  position: absolute;
  right: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-gradient);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.05);
  box-shadow: var(--shadow-md);
}

/* Categories List */
.categories-list {
  list-style: none;
}

.categories-list li {
  margin-bottom: var(--space-3);
}

.categories-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.categories-list a:hover {
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  transform: translateX(4px);
}

.category-count {
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  min-width: 24px;
  text-align: center;
}

/* Recent Posts Widget */
.recent-posts {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.recent-post {
  display: flex;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid #e2e8f0;
  transition: all var(--transition-fast);
}

.recent-post:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.recent-post:hover {
  transform: translateX(4px);
}

.recent-post-image {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
}

.recent-post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.recent-post-content {
  flex: 1;
}

.recent-post-title {
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-2);
}

.recent-post-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.recent-post-title a:hover {
  color: var(--primary-color);
}

.recent-post-date {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* Tags Cloud */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag-item {
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-color);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.tag-item:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Newsletter Widget */
.newsletter-widget {
  background: var(--primary-gradient);
  color: white;
}

.newsletter-widget .widget-title {
  color: white;
}

.newsletter-widget .widget-title::after {
  background: rgba(255, 255, 255, 0.3);
}

.newsletter-widget p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-6);
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.newsletter-form input {
  padding: var(--space-3) var(--space-4);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.newsletter-form input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.2);
}

.btn-newsletter {
  padding: var(--space-3) var(--space-6);
  background: white;
  color: var(--primary-color);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-newsletter:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===================================
   Pagination
   =================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-16);
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid #e2e8f0;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-weight: 600;
}

.pagination-btn:hover:not([aria-disabled="true"]),
.pagination-btn.active {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pagination-btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-ellipsis {
  padding: 0 var(--space-2);
  color: var(--text-muted);
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 56px;
  height: 56px;
  background: var(--primary-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  z-index: var(--z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* ===================================
   Loading States
   =================================== */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(4px);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 102, 255, 0.2);
  border-top: 3px solid var(--primary-color);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* No Results State */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16);
  color: var(--text-muted);
}

.no-results-content i {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-4);
  color: var(--text-light);
}

.no-results-content h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.no-results-content p {
  font-size: var(--text-lg);
  color: var(--text-muted);
}

/* ===================================
   Animações
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* Aplicar animações */
.animate-in {
  animation: fadeInUp 0.6s ease-out;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ===================================
   Responsividade
   =================================== */

/* Tablets */
@media (max-width: 1024px) {
  .blog-layout {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .blog-sidebar {
    order: -1;
    position: static;
  }
  
  .featured-post {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .featured-post .post-image {
    height: 300px;
  }
  
  .categories-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
  }
  
  .posts-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --space-20: 3rem;
    --space-16: 2.5rem;
    --space-12: 2rem;
  }
  
  .hero-title {
    font-size: clamp(var(--text-3xl), 6vw, var(--text-4xl));
  }
  
  .hero-description {
    font-size: var(--text-lg);
  }
  
  .featured-post .post-content {
    padding: var(--space-6);
  }
  
  .featured-post h3 {
    font-size: var(--text-2xl);
  }
  
  .section-header h2 {
    font-size: var(--text-3xl);
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .category-card {
    padding: var(--space-6);
  }
  
  .category-icon {
    width: 60px;
    height: 60px;
    font-size: var(--text-2xl);
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .post-card .post-content {
    padding: var(--space-5);
  }
  
  .sidebar-widget {
    padding: var(--space-6);
  }
  
  .pagination {
    gap: var(--space-1);
  }
  
  .pagination-btn {
    width: 40px;
    height: 40px;
  }
  
  .back-to-top {
    bottom: var(--space-6);
    right: var(--space-6);
    width: 48px;
    height: 48px;
  }
  
  .breadcrumb ol {
    justify-content: flex-start;
  }
}

/* Mobile pequeno */
@media (max-width: 480px) {
  .hero-content {
    padding: var(--space-6) var(--space-4);
  }
  
  .featured-post .post-content {
    padding: var(--space-4);
  }
  
  .category-card {
    padding: var(--space-4);
  }
  
  .post-card .post-content {
    padding: var(--space-4);
  }
  
  .sidebar-widget {
    padding: var(--space-4);
  }
  
  .pagination {
    flex-wrap: wrap;
  }
}

/* ===================================
   Modo escuro (preparação)
   =================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --text-light: #718096;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --blog-card-bg: #2d3748;
  }
  
  .search-input {
    background: var(--bg-tertiary);
    border-color: #4a5568;
    color: var(--text-primary);
  }
  
  .search-input:focus {
    background: var(--bg-secondary);
  }
  
  .pagination-btn {
    background: var(--bg-secondary);
    border-color: #4a5568;
    color: var(--text-secondary);
  }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
  .page-hero,
  .blog-sidebar,
  .pagination,
  .back-to-top,
  .search-popup,
  .btn-menu {
    display: none !important;
  }
  
  .blog-layout {
    grid-template-columns: 1fr;
  }
  
  .post-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  .featured-post {
    break-inside: avoid;
  }
}

/* ===================================
   Reduced Motion
   =================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .loading-spinner {
    animation: none;
    border: 3px solid var(--primary-color);
  }
}