style.css

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,100..900;1,100..900&display=swap');
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css");

* {
    margin: 0;
    padding: 0;
}

:root {
    --cor-fundo: #000;
    --cor-primaria: #fff;
    /* scroll-behavior: smooth; */
}

body {
    background-color: var(--cor-fundo);
}

#texto {
    width: 80%;
    margin: 35vh auto;
    background-color: var(--cor-fundo);
}

#texto p {
    font-size: 3rem;
    font-family: 'Noto Sans', sans-serif;
    color: var(--cor-primaria);
    line-height: 1.5;
}

.texto-normal {
    transform: scale(1, 1);
    transition: all .3s;
}

.texto-invertido {
    -moz-transform: scale(-1, 1);
    -webkit-transform: scale(-1, 1);
    -o-transform: scale(-1, 1);
    -ms-transform: scale(-1, 1);
    transform: scale(-1, 1);
    transition: all .3s;
}

#controles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 5px;
    z-index: 1;
}

#controles button {
    cursor: pointer;
    background: #000;
    border: 1px solid #fff;
    padding: 5px;
}

#controles .bi {
    color: #fff;
    font-size: 1.5rem;
}