style.css

body{ 
    background-color:#f7f5f3;
    margin: 30px;
    padding: 50px;
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode'

}

#texto-principal{
    color:#9b153b;
    text-align: center;
    font-size: 55px;
}
h2{
    color: #3b1922; 
    text-align: center;
    font-size: 50px;
}

p{
    color:black;
    text-align: justify;
    font-size: 20px;
}


.imgmenor{
    width: 40% ; /*largura*/
    display: block;
    margin: auto;
}

#gatoirritado{
    width: 30% ; /*largura*/
    display: block;
    margin: auto;
}

.cabecalho{
    background-image: linear-gradient(#020007, #231152);
    padding:20px;
    background-color: #41393b;
    border-bottom: 4px double rgb(239, 248, 225);
    text-align: center;
    font-size: 32px;
    justify-content: space-around;
    display: flex;
}

#banner{
    width: 15% ; /*largura */
    padding: 5px;
    margin: 10px;
    border-radius: 10px;
}

.principal{
    background-color: rgb(238, 238, 240);
}