.conteudo{
 width: 100%;
 float: left;
 height: auto;
 margin-top: 10px;  
}

.conteudo h3{
 width: 80%;
 height: 38px;
 color: #00FFFF;
 text-align: center;
 font-size: 18px;
 padding-top: 14px;
 border-radius: 10px;
 margin: 20px 10% 0 10%;
 background-color: #002040;
}

.conteudo input{
  width: 79%;
  height: 40px;
  text-align: center;
  font-size: 16px;
  color: #2F4F4F;
  font-weight: bold;
  padding-top: 4px; 
  border-radius: 10px;
  margin: 20px 10% 10px 10%; 
}

.conteudo button{
 width: 80%;
 height: 50px;
 color: #00FFFF;
 text-align: center;
 font-size: 18px;
 padding-top: 2px;
 border-radius: 10px;
 cursor: pointer;
 text-decoration: none;
 margin: 20px 10% 0 10%;
 background-color: #002040;
}

.conteudo button:hover{
  text-decoration: underline;
}

.footer img{
  width: 80%;
  height: auto;
  margin: 20px 10% 0 10%;
}

.bandeiras p{
 width: 80%;
 height: 80px;
 color: #2F4F4F;
 text-align: center;
 font-size: 19px;
 padding: 1px; 
 border-radius: 10px;
 background-color: #FFF; 
 margin: 10px 10% 10px 10%;
}