.volatility-info-link{text-align:center;float:left;width:100%;line-height: 1.4em;}
.volatility-info-link a{color:#0000FF;text-decoration:underline;}
.chapter-link{width:37%;float:left;text-align:center;font-size:1.1em;}
.chapter-link a{width:100%;float:left;text-align:center;border: thin solid #CCC;}
.chapter-link a:hover{color:#f00;background:#CFF;}



.books{float:left;border:1px solid #00CCFF;width:25%; margin: 1%;}
.books img{width:100%;}

#learn-volatility{float:left;text-align:left;width:30%;padding: 1%;}

.master{width:100%;float:left;text-align:center;border:thin solid #CFF;}
.isbn{float:left;text-align:center;background-color:#69ADBE;width:40%;font-size:1.2em;color:#0A1AB6;}
.buynow{float:left;text-align:center;width:20%;}
.pages{width:40%;float:left;background-color:#69ADBE;text-align:center;}
.pages a{color:#0A1AB6;font-weight:bold;font-size:1.2em;}
.pages a:hover{color:#FFF;}




.book-title{color:#0A1AB6;font-family:arial;text-align:center;}



/* for 600px or less */
@media screen and (max-width: 600px) {
.chapter-link{
width:35%;
}

.books{
width:20%;
border: 0px;
}

#learn-volatility{
width:35%;
}

.isbn{width:100%;}
.buynow{width:100%;}
.pages{width:100%;}

}



/* for 480px or less */
@media screen and (max-width: 480px) {
.chapter-link{
width:100%;
}

.books{
width:70%;
border: 0px;
}

#learn-volatility{
width:100%;
}

.isbn{width:100%;}
.buynow{width:100%;}
.pages{width:100%;}
}