.selector-doc {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    margin: 0;
    padding: 0;
    width: 100%;
}
.select-title h2 {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    font-size: 32px;
    text-align: center;
}
.container-select {
    margin: 0;
    padding: 0;
}
.selector-doc label {
    margin: -20px 0;
    padding: 0;
    font-family: arial;
    font-size: 22px;
}
.pg-select {
    width: auto;
    height: 35px;
    margin: 0;
    padding: 0;
    font-family: arial;
    font-size: 18px;
    text-align: center;
    color: black;
    background-color: lightgreen;
    border: 2px solid green;
    border-radius: 3px;
}
.pg-iframe {
    display: flex;
    justify-content: center;  
    align-items: center;     
    flex-direction: column;
    margin:20px;
}
.pg-iframe #visor {
    margin: 0;
    padding: 0;
    border: none;
    outline: none;
}
#fallback {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#fallback-link {
    display: inline-block;
    padding: 20px 40px;
    background-color: #0078d7;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: bold;
    box-shadow: 0 6px #005a9e;       
    transition: all 0.3s ease;
}

#fallback-link:hover {
    background-color: #005a9e;
    box-shadow: 0 4px #004377;
    transform: translateY(2px);
}