.slider {
    margin-top: 0px;
    top: 0px;
}
.slider_page {
    /* text-align: center; */
    height: 280px; 
    color: white;
}

.slider_page1 {
    background-color: black;
    background-image: url(images/head_sensores.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: right;    
}
.slider_page2 {
    background-color: black;
    background-image: url(images/head_handy.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: right;    
}
.slider_page3 {
    background-color: black;
    background-image: url(images/head_torre.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: right;    
}

.slider_page h2 {
    margin-top: 30px;
    margin-left: 25px;
    padding-bottom: 0px;
    /* text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue; */
    color: white;
    text-shadow: 1px 1px 2px black;
}

.slider_page p {
    font-size: 20px;
    margin-top: 10px;
    margin-left: 25px;    
    text-shadow: 1px 1px 2px black;
}

.slider_page a {
    text-decoration: none;
    display: inline-block;
    background-color: #00BFF0;
    color: white;
    padding: 10px 20px;
    border-radius: 3px;
    margin-left: 25px;
    margin-top: 50px;
}