/* =============================================
   VARIÁVEIS GLOBAIS
   ============================================= */
:root {
  /* Cores */
  --primary-color: #1a3e72;
  --secondary-color: #2a5696;
  --accent-color: #ff6b35;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --gray-color: #6c757d;
  --light-gray: #e9ecef;

  /* Espaçamentos */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Bordas */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-circle: 50%;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

  /* Transições */
  --transition-fast: 0.2s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;
}

/* =============================================
   RESET E CONFIGURAÇÕES BASE
   ============================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: var(--light-color);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Ubuntu', sans-serif;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* =============================================
   CLASSES DE ACESSIBILIDADE
   ============================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-color);
  color: white;
  padding: var(--spacing-xs);
  z-index: 1000;
  transition: top var(--transition-normal);
}

.skip-link:focus {
  top: 0;
}

/* =============================================
   CABEÇALHO
   ============================================= */
.site-header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--spacing-sm) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.site-logo {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.site-logo:hover {
  color: white;
}

.logo-icon {
  margin-right: var(--spacing-xs);
  color: var(--accent-color);
  font-size: 1.2em;
}

/* Navegação */
.main-navigation {
  width: 100%;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease;
}

.main-navigation.active {
  max-height: 500px;
}

.nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-item {
  width: 100%;
  text-align: center;
}

.nav-link {
  display: block;
  padding: var(--spacing-xs) 0;
  font-weight: 500;
  position: relative;
  color: rgba(255, 255, 255, 0.9);
}

.nav-link:hover,
.nav-link:focus {
  color: white;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--accent-color);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link:focus::after {
  width: 100%;
}

/* Menu Mobile */
.mobile-menu-button {
  background: none;
  color: white;
  font-size: 1.5rem;
  padding: var(--spacing-xs);
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-md);
}

.mobile-menu-button[aria-expanded="true"] .fa-bars::before {
  content: "\f00d";
}

/* Barra de Pesquisa */
.search-box {
  width: 100%;
  margin-top: var(--spacing-sm);
}

.search-form {
  display: flex;
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: none;
  border-radius: var(--border-radius-lg);
  font-family: inherit;
}

.search-button {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  padding: 0 var(--spacing-sm);
  color: var(--gray-color);
}

/* =============================================
   CONTEÚDO PRINCIPAL
   ============================================= */
.main-content {
  max-width: 1200px;
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.primary-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Seção Hero */
.hero-section {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../assets/img/tech-bg.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  padding: var(--spacing-xl) var(--spacing-md);
  border-radius: var(--border-radius-md);
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
}

.hero-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-lg);
  border-radius: 50px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.hero-button:hover,
.hero-button:focus {
  background-color: #e05a2b;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Posts em Destaque */
.featured-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.section-title {
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.section-icon {
  color: var(--accent-color);
}

.featured-posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

/* Cartão de Post */
.post-card {
  background: white;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.post-image-container {
  height: 200px;
  overflow: hidden;
}

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

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

.post-content {
  padding: var(--spacing-md);
}

.post-category {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  margin-bottom: var(--spacing-xs);
}

.post-title {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-xs);
}

.post-excerpt {
  color: var(--gray-color);
  margin-bottom: var(--spacing-sm);
}

.post-meta {
  display: flex;
  font-size: 0.9rem;
  color: var(--gray-color);
}

.post-date,
.post-reading-time {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.post-reading-time {
  margin-left: var(--spacing-sm);
}

/* =============================================
   BARRA LATERAL
   ============================================= */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.sidebar-widget {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

.widget-title {
  position: relative;
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.widget-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 3px;
  background-color: var(--accent-color);
}

/* Widget de Busca */
.sidebar-search-form {
  display: flex;
  position: relative;
}

.sidebar-search-input {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
}

.sidebar-search-button {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  padding: 0 var(--spacing-sm);
  color: var(--gray-color);
}

/* Widget de Posts Populares */
.popular-posts-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.popular-post-item {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.popular-post-image {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
}

.popular-post-title {
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.popular-post-item:hover .popular-post-title {
  color: var(--accent-color);
}

/* Widget de Newsletter */
.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.newsletter-input {
  padding: var(--spacing-xs);
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
}

.newsletter-button {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  font-weight: 700;
  transition: background-color var(--transition-fast);
}

.newsletter-button:hover {
  background-color: var(--secondary-color);
}

/* Widget de Categorias */
.categories-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.category-item {
  padding: 0.3rem 0;
  border-bottom: 1px dashed var(--light-gray);
}

.category-link {
  display: flex;
  justify-content: space-between;
  transition: color var(--transition-fast);
}

.category-link:hover {
  color: var(--accent-color);
}

.category-count {
  color: var(--gray-color);
  font-size: 0.9rem;
}

/* =============================================
   RODAPÉ
   ============================================= */
.site-footer {
  background: var(--dark-color);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.footer-about {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-circle);
  transition: background-color var(--transition-fast);
}

.social-link:hover {
  background-color: var(--accent-color);
}

.footer-links-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links-title {
  position: relative;
  padding-bottom: var(--spacing-xs);
}

.footer-links-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--accent-color);
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-color);
  padding-left: 5px;
}

.footer-copyright {
  text-align: center;
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  grid-column: 1 / -1;
}

.copyright-text {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* =============================================
   MEDIA QUERIES
   ============================================= */
@media (min-width: 768px) {
  .header-container {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
  }

  .site-logo {
    margin-bottom: 0;
  }

  .main-navigation {
    width: auto;
    max-height: none;
    order: 1;
    flex-basis: 100%;
    margin-top: var(--spacing-sm);
  }

  .nav-list {
    flex-direction: row;
    justify-content: center;
  }

  .nav-item {
    width: auto;
  }

  .search-box {
    width: auto;
    margin-top: 0;
    order: 2;
  }

  .search-input {
    width: 200px;
  }

  .mobile-menu-button {
    display: none;
  }

  .main-content {
    grid-template-columns: 2fr 1fr;
  }

  .featured-posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-container {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .main-navigation {
    order: 0;
    flex-basis: auto;
    margin-top: 0;
  }

  .nav-list {
    justify-content: flex-end;
  }

  .search-box {
    order: 1;
  }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #f8f9fa;
  }

  .post-card,
  .sidebar-widget {
    background-color: #1e1e1e;
    color: #e0e0e0;
  }

  .post-excerpt,
  .post-date,
  .post-reading-time {
    color: #b0b0b0;
  }
}