.body{background-color:#f9f9f9}.btn{background-color:#172432;border:1px solid #172432;box-shadow:0px 2px 2px 1px rgba(0,0,0,0.3)}header{background-color:#ecf1f4;border-bottom:3px solid #172432;padding:4rem 0}header .titulo{margin:0 auto}#contenido{padding:2rem 0}.item-imag{margin-top:2rem;text-align:center}.item-imag h3{font-size:1.1rem;text-align:center;letter-spacing:1px;margin:1rem}.item-imag .content{background-size:cover;background-repeat:no-repeat;background-position:center;box-shadow:2px 2px 2px 1px rgba(0,0,0,0.2);height:25rem;padding:1rem}.item-imag .descargar{color:#30a9de}aside{background:#f9f9f9;padding:2rem}aside h4{color:#4d4d4d;font-size:1.2rem;font-weight:normal;text-align:center}.alert-danger{margin:0 auto;text-align:center}form{background:#f9f9f9;max-width:650px;margin:0 auto;padding:1.5rem 1rem;margin-top:2rem;text-align:left}form input{height:40px;padding:10px}