#banner {
  clear: right;
  position: relative;
  overflow: hidden;
  width: 100%;
  margin:  0 auto; 
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;	
  height: 532px;
}
#slider {
	width: 100%;
	height: auto;
} 

#slider > a {
	position: absolute;
	width: 100%;
}

#slider img {
    width: 100%;
    height: auto;
}

a.mas, a.menos {
	position: absolute;
	top: 50%;
	left: 0px;
	z-index: 10;
	width: 30px;
	height: 36px;
	text-align: center;
	line-height: 30px;
	font-size: 30px;
	color: #7881ef;
	background: rgba(240, 238, 187, 0.5);
	text-decoration: none;
    transition: .5s margin ease;
    border-radius: 10px;
}

a.mas {
	left: 100%;
	margin-left: 30px;
	visibility: hidden;
}

#banner:hover a.mas {
	visibility: visible;
	margin-left: -30px;
}

a.menos {
	left: 0;
	visibility: hidden;
	margin-left: -30px;
}

#banner:hover a.menos {
	visibility: visible;
	margin-left: 0px;
}
@media only screen and (max-width: 359px) {
    #banner, #slider {
        width: 100%;
        height: 260px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 360px) and (max-width: 459px) {
    #banner, #slider {
        width: 100%;
        height: 360px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 460px) and (max-width: 559px) {
    #banner, #slider {
        width: 100%;
        height: 440px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 560px) and (max-width: 659px) {
    #banner, #slider {
        width: 100%;
        height: 520px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 660px) and (max-width: 759px) {
    #banner, #slider {
        width: 100%;
        height: 600px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 760px) and (max-width: 859px) {
    #banner, #slider {
        width: 100%;
        height: 640px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 860px) and (max-width: 959px) {
    #banner, #slider {
        width: 100%;
        height: 920px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }    
}
@media only screen and (min-width: 960px) and (max-width: 1050px){
    #banner {
      top: 0px;  
    }
    #banner {
        width: 100%;
        height: 800px;
    }
    #slider img {
        width: 100%;
        height: auto;
    }
}