body {
    background-color: #313131;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-family: 'Poppins', sans-serif;
    color: #f4f4f4;
    --cor-destaque: #87d0a6;
}

.header {
    width: 100%;  /*largura do espaço disponível*/
    max-width: 900px;  /*para uma tela grande a larg. max. é 900*/
    padding: 8px; /*distancia dos elementos na borda*/
    box-sizing: border-box; /*para ter controle do elemento*/
    margin: 0 auto; /*o header fica centralizado*/
    display: flex; /*para alinhar os elementos*/
    justify-content: flex-end; /*os elementos ficam no canto direito*/
}

.header__link {
    text-decoration: none;
    box-sizing: border-box; /*para controlar o tamanho do elemento*/
    padding: 4px; /*distancia entre cada link*/
}

.header__link:hover {
    opacity: .6;
}

.header__link:focus {
    outline: none;
    background-color: #4d4d4d;
    border-radius: 5px;
}

.icone {
    width: 24px;
    border-radius: 50px;
}

.icone--texto {
    margin: 0 8px;
    animation: pulsar 1s infinite alternate;
}

.main {
    width: 100%;
    max-width: 700px;
    padding: 8px;
    box-sizing: border-box;
    margin: 0 auto;
}

.perfil {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.perfil__foto {
    width: 100%;
    max-width: 200px;
    border-radius: 50%;
    border: 6px solid #868686;
}

.perfil__nome {
    font-family: 'Vollkorn', cursive;
    font-size: 52px;
    font-weight: 400;
    color: var(--cor-destaque);
    margin: 16px 0;
}

.perfil__descricao {
    font-size: 14px;
    font-weight: 400;
    margin: 0;
    width: 100%;
    max-width: 350px;
    text-align: center;
}

.section {
    padding: 8px;
    width: 100%;
    max-width: 350px;
    margin: 24px auto;
    box-sizing: border-box;
}

.section__titulo {
    font-size: 22px;
    font-weight: 400;
    color: var(--cor-destaque);
    margin: 16px 0;
}

.curso {
    background-color: #3b3b3b;
    padding: 8px;
    margin: 16px 0;
    box-sizing: border-box;
    border-radius: 3px;
}

.curso__titulo {
    font-size: 18px;
    font-weight: 400;
    color: var(--cor-destaque);
    margin: 8px 0;
}

.curso__descricao {
    font-size: 12px;
    font-weight: 400;
    margin: 8px 0;
}

.footer {
    width: 100%;
    height: 42px;
    background-color: var(--cor-destaque);
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    flex-shrink: 0;  
}

.footer__texto {
    font-size: 12px;
    font-weight: 400;
    color: #3b3b3b;
    display: flex;
    align-items: center;  
}

@keyframes pulsar {
    0% {
        transform: scale(.8);
    }
    100% {
        transform: scale(1.2);
    }
}