header {
  display: flex;
  justify-content: space-between;
  width: 90%;
  font-family: 'sans-serif', monospace;
  margin: 0 auto;
  color: #4e2e09;
  background-color: #d9c9b7;
}
nav ul {
    margin-top: 25px;
    list-style: none;
    padding: 0;
}
header img {
    height: 100px; 
    width: auto;
    margin-right: 15px; 
}
main {
  width: 90%;
  margin: 0 auto;
  flex: 1;
}
footer {
  display: flex;
  justify-content: center;
  background-color: #bc986c;
}
body {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #b99a81
}


.caixaflex {
    display: flex; 
    justify-content: space-between; 
    gap: 20px; 
    flex-wrap: wrap; 
    margin-top: 20px;
}


.caixacss {
    flex: 1 1 18%; 
    background-color: #594534; 
    color: white; 
    border: 2px solid #b99a81; 
    padding: 15px;
    text-align: center;
    border-radius: 8px; 

}


.caixacss img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 10px auto;
}


.frase-simples {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    font-style: italic;
    font-size: 1.2em;
    border-top: 1px dashed #ccc;
}

@media (max-width: 768px) {

    header {
        flex-direction: column; 
        align-items: flex-start;
        padding: 10px;
    }
    
  
    nav ul {
        flex-direction: column;
        align-items: flex-start;
    }
    nav ul li {
        margin-left: 0;
        padding: 5px 0;
    }

    
    .caixaflex {
        gap: 15px;     
    }
    
    .caixacss {
        flex: 1 1 47%; 
    }

    main, header, footer {
        width: 95%;
        margin: 0 auto;
    }
}

article img {
    max-width: 50%;
    height: auto;
    display: block; 
    margin: 20px auto; 
}