/* ===== ESTILOS GERAIS ===== */
body {
  font-family: 'Arial', sans-serif;  
  margin: 0;                         
  padding: 0;                        
  background-color: #f5f7fa;         
  color: #333;                       
  line-height: 1.6;                  
}

/* ===== CABEÇALHO ===== */
header {
  background-color: #2c3e50;         
  color: white;                      
  padding: 20px;                     
  display: flex;                     
  justify-content: space-between;    
  align-items: center;               
  flex-wrap: wrap;                   
}

.header-content {
  display: flex;                     
  align-items: center;               
  gap: 20px;                         
}

.profile-img {
  width: 80px;                      
  height: 80px;                     
  border-radius: 50%;                
  object-fit: cover;                 
  border: 3px solid #3498db;         
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header-text {
  text-align: left;                  
}

button {
  margin: 5px;                       
  padding: 10px 15px;                
  background-color: #3498db;         
  color: white;                      
  border: none;                      
  border-radius: 5px;                
  cursor: pointer;                   
  transition: background-color 0.3s; 
}

button:hover {
  background-color: #2980b9;        
}

section {
  max-width: 800px;                 
  margin: 20px auto;                
  background-color: white;          
  padding: 20px;                    
  border-radius: 8px;               
  box-shadow: 0 2px 5px rgba(0,0,0,0.1); 
}

h2 {
  color: #2c3e50;                   
  border-bottom: 2px solid #3498db; 
  padding-bottom: 5px;              
  margin-bottom: 15px;              
}

ul {
  padding-left: 20px;               
  list-style-type: square;          
}

footer {
  text-align: center;               
  padding: 15px;                    
  background-color: #2c3e50;        
  color: white;                     
  margin-top: 30px;                 
}

@media (max-width: 600px) {
  header {
    flex-direction: column;         
    text-align: center;            
  }
  
  .header-content {
    flex-direction: column;        
    gap: 10px;                     
    margin-bottom: 15px;           
  }
  
  section {
    margin: 10px;                  
    padding: 15px;                 
  }
}

body.dark-mode {
  background-color: #1e1e1e;       
  color: #f5f5f5;                  
}

body.dark-mode header,
body.dark-mode footer {
  background-color: #121212;       
}

body.dark-mode section {
  background-color: #2a2a2a;       
  color: #f5f5f5;                  
}

body.dark-mode h2 {
  color: #ffffff;                  
  border-color: #90caf9;           
}

body.dark-mode button {
  background-color: #90caf9;       
  color: #000;                     
}

body.dark-mode button:hover {
  background-color: #64b5f6;       
}

body.dark-mode .profile-img {
  border-color: #64b5f6;           
  box-shadow: 0 2px 4px rgba(0,0,0,0.4); 
}