style.css

@import url('https://fonts.googleapis.com/css?family=Poppins:200i,400&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #EFF1FA;
  font-family: Poppins, sans-serif;
}

.main {
  width: 80vw;
  margin: auto;
  display: flex;
  justify-content: center;
}

#a-logo{
  margin: auto;
  padding-top: 2vw;
  margin-left: 20vh;
}


.titulo {
  padding-bottom: 3rem;
  width: 20vw;
  
  justify-content: center;
  margin: auto;
  color:#757FB2;

}

.form-box{
  width: 30vw;
  
}

.btn-div{
  justify-content: center;
  text-align: center;
}

.btn:hover {
 cursor: pointer;
}

.msg-box {
  padding: 10px;
  margin: 0 10px 0 10px;
  box-shadow: 2px 2px 2px 1px rgba(0, 0, 0, 0.2);
  background-color: rgb(192, 206, 236);
  border-radius: 0.8em;
  width: 20vw;
  height: auto;
  outline: none;
  justify-content: center;
  text-align: center;
}

.btnEncrypt , .btnCopy {
  border: 0;
  color: white;
  font-weight: bold;
  background-color: #3f5c80;
  padding: 10px;
  margin-top: 10px;
  border-radius: 2rem;
  width:15rem;
  line-height: 1.5rem;
}

.btnCopy{
  
  background-color: #9fa7d1;
  
}
.btnEncrypt:hover
 {
  border: 0;
  color: white;
  font-weight: bold;
  background-color: #283057;
  padding: 10px;
  border-radius: 2rem;
  width:15rem;
  line-height: 1.5rem;
}
.btnCopy:hover{

  border: 0;
  color: white;
  font-weight: bold;
  background-color: #606aa3;
  padding: 10px;
  border-radius: 2rem;
  width:15rem;
  line-height: 1.5rem;
}
.btnDecrypt {
  border: 0;
  color: #052051;
  font-weight: bold;
  background-color: white;
  padding: 10px;
  margin-top: 10px;
  border-radius: 2rem;
  width:15rem;
  line-height: 1.5rem;
}
.btnDecrypt:hover {
  border: 0;
  font-weight: bold;
  background-color: #dee9f5;
  padding: 10px;
  margin-top: 10px;
  border-radius: 2rem;
  width:15rem;
  line-height: 1.5rem;
}
.text-input {
  border-radius: 0.5em;
  border: none;
  background-color: #EFF1FA;
  overflow: hidden;
  font-family: Poppins, sans-serif;
  font-size: 1.5rem;
  color:#363d61d5;
  display: block;
  padding: 0.5em;
  width: 100%;
  height: 60vh;
  outline: none;
}

.text-msg {
  border-radius: 0.5em;
  border: none;
  /* background-color: #EFF1FA;*/
  background-color: #ffffff; 
  overflow: hidden;
  font-family: Poppins, sans-serif;
  font-size: 1.5rem;
  color:#363d61d5;
  display: block;
  padding: 0.5em;
  width: 100%;
  height: 60vh;
  outline: none;
}

label{
  font-size: 0.85rem;
  color: #787e96;
}

::placeholder { /* Chrome, Firefox, Opera, Safari 10.1+ */
  color: #606dac;
  font-family: Poppins, sans-serif;
  opacity: 0.5; /* Firefox */
}

:-ms-input-placeholder { /* Internet Explorer 10-11 */
  color: #757FB2;
  font-family: Poppins, sans-serif;
}

::-ms-input-placeholder { /* Microsoft Edge */
  color: #757FB2;
  font-family: Poppins, sans-serif;
}



.container {
  background-color:#abb4f54b;
  height: 30px;
  position: fixed;
  top: 0px;
  left: 0px;
  transition: top 0.3s;
  width: 100%;
  margin: 0;  
}
#navbar {
  position: fixed;
  top: 0px;
  left: 0px;
  transition: top 0.3s;
  width: 100%;
  height: 50px;
  margin: 0;   
}
#navbar ul {
  display: flex;
  justify-content: flex-end;
  
  
}

#navbar li {
  list-style: none;
  padding-right: 3rem;
 
}
#navbar a {
  text-decoration: none;
  color: rgb(108, 121, 158);
  cursor: pointer;
  justify-content:center;
  align-items:center;
}
#navbar a:hover,
#navbar a:focus {
  color: #0628a3;
}



@media (max-width: 675px) {

  .main {
    
    margin: auto;
    display: flex;
    
    display: block; 
    flex-direction: column;
    
    justify-content: center;
    
  }
  .msg-box, .form-box {
    width: 70vw;
    margin-bottom: 3rem;
  }
  #a-logo{
    margin: auto;
    padding-top: 2.5vw;
    margin-left: 10vh;
  }

  .titulo {
    padding: 20px;
    width: 40vw;
    
    justify-content: center;
    margin: auto;
    color:#757FB2;
  
  }
  

}