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

body {
    background-color: #000000;
    display: flex;
    flex-direction: column;
    height: 100dvh; /* Questa "d" (dynamic viewport height) risolve il taglio della barra */
    overflow: hidden;
}

#header-img {
    width: 100%;
    height: auto;
    display: block;
}

#pdf-container {
    flex: 1; 
    background-color: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
}

#footer-btn {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent; 
}