estilos3.css

*{
    background: purple;
    font-family: Georgia;
    line-height: 150%;
    font-size: 25px;
    overflow-y: hidden;
}

.logo {
    margin-top: 10px;
}

main {
    display: flex;
    margin-bottom: 15px;
    margin-left: 100px;
}
.texto {
    height: 370px;
    border: none;
    color:blueviolet;
    margin-top: 30px;
    padding: 2px;
    text-transform: lowercase;
}
.texto:focus {
    outline: none
}
::placeholder { 
    color: blueviolet; 
}

h6 {
    font-size: 15px;
    margin: 0;
}
.mensaje {
    height: 530px;
    background: palevioletred;
    background-image: url("Muñeco.png");
    background-repeat: no-repeat;
    background-position: center;
    border: none;
    border-radius: 24px;
    color: blueviolet;
    margin-left: 125px;
    margin-top: 2px;
    padding-left: 20px;
    position: fixed;
}
.mensaje:focus {
    outline: none;
}

.botones {
    display: flex;
    margin-top: 5px;
}

.boton-desencriptar {
    background: violet;
    border: none;
    border-radius: 24px;
    color: purple;
    cursor: pointer;
    height: 63px;
    margin-left: 30px;
    width: 328px;
}

.boton-encriptar {
    background-color: blueviolet;
    border: none;
    border-radius: 24px;
    color: white;
    cursor: pointer;
    height: 63px;
    width: 328px;
}

.boton-copiar {
    background: violet;
    border: none;
    border-radius: 24px;
    color: purple;
    cursor: pointer;
    height: 63px;
    margin-left: 120px;
    margin-top: 440px;
    position: absolute;
    width: 310px;
}

footer{
    text-align: center;
}
.copyright{
    color: black;
    font-size: 13px;
    margin: 1px;
}