* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    min-height: 100vh;
    background-color: white;
    position: relative;
  }
  
  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  header {
    background-color: #2563eb; 
    color: white;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    position: relative;
    z-index: 10;
  }
  
  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1rem;
  }
  
  .blog-title {
    font-size: 1.875rem;
    font-weight: bold;
    letter-spacing: -0.025em;
  }
  
  .profile-photo {
    width: 5rem;
    height: 5rem;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 20;
    overflow: hidden;
  }
  
  .profile-photo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
  }
  
  nav {
    background-color: white;
    border-bottom: 1px solid #e5e7eb;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: 5;
    clear: both;
  }
  
  .nav-content {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
  }
  
  .nav-link {
    color: #2563eb;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
    padding: 0.25rem 0.5rem;
  }
  
  .nav-link:hover {
    color: #dc2626;
  }
  
  main {
    padding: 3rem 1rem;
  }
  
  section {
    margin-bottom: 3rem;
  }
  
  h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: #2563eb;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
  
  .topics-container {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
  }
  
  .topic-card {
    position: relative;
    width: 10rem;
    height: 10rem;
    border: 2px solid #dc2626;
    border-radius: 0.75rem;
    overflow: hidden;
    cursor: pointer;
    background-size: cover;
    background-position: center;
    text-decoration: none;
    display: block;
  }
  
  .topic-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    transition: opacity 0.2s;
    opacity: 0;
  }
  
  .topic-card:hover .topic-overlay {
    opacity: 1;
  }
  
  .topic-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: white;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
    z-index: 2;
  }
  
  .topic-icon {
    width: 2rem;
    height: 2rem;
  }
  
  .topic-title {
    font-weight: 500;
    text-align: center;
    padding: 0 0.5rem;
  }
  
  .summary-card {
    background-color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 2px solid #dc2626;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  @media (min-width: 768px) {
    .summary-card {
      flex-direction: row;
      align-items: flex-start;
    }
    
    .summary-text-container {
      flex: 4;
    }
    
    .summary-image-container {
      flex: 1;
      max-width: 25%;
      margin-left: 1.5rem;
    }
  }
  
  .summary-text-container {
    flex: 1;
  }
  
  .summary-text {
    color: #374151;
    line-height: 1.625;
  }
  
  .summary-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.5rem;
  }
  
  .summary-image {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  }
  
  footer {
    background-color: #374151; 
    border-top: 1px solid #4b5563;
    color: #f9fafb;
  }
  
  .footer-container {
    padding: 2rem 1rem;
  }
  
  .footer-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-info {
    margin-bottom: 1rem;
    text-align: center;
  }
  
  .footer-title {
    color: #f9fafb;
    font-weight: bold;
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
  }
  
  .footer-copyright {
    color: #d1d5db;
    font-size: 0.875rem;
  }
  
  .footer-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-links-title {
    color: #f9fafb;
    font-weight: 500;
    margin-bottom: 0.5rem;
  }
  
  .footer-links-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }
  
  .footer-link {
    color: #93c5fd;
    font-size: 0.875rem;
    text-decoration: none;
    transition: color 0.2s;
  }
  
  .footer-link:hover {
    color: #fca5a5;
  }
  
  @media (min-width: 768px) {
    .footer-content {
      flex-direction: row;
    }
    
    .footer-info {
      margin-bottom: 0;
      text-align: left;
    }
  }
  
  @media (max-width: 768px) {
    .header-content {
      flex-direction: column;
      gap: 1rem;
    }
    
    .profile-photo {
      margin-bottom: 0.5rem;
    }
    
    .nav-content {
      justify-content: center;
    }
  } 
 /* Resposta errada */
.respostas input[type="radio"]:checked + label {
background-color: #f8d7da;
color: #721c24;
}

/* Resposta correta */
.respostas input[type="radio"].correta:checked + label {
background-color: #d4edda;
color: #155724;
}
/* Estilo para alternativas corretas */
input[type="radio"]:checked + label.correta {
background-color: #d4edda;
color: #155724;
font-weight: bold;
}

/* Estilo para alternativas incorretas */
input[type="radio"]:checked + label.errada {
background-color: #f8d7da;
color: #721c24;
font-weight: bold;
}