header{
    padding: 70px 0px;
    color: #fff;
    display: flex;
    position: relative;
    overflow: hidden;
    background: #333;
    background: url(../img/01.jpg) ;
    background-position: fixed;
    margin-bottom: 60px;
}


header h1 {
    padding-top: 20px;
    font-weight: 600;
    letter-spacing: -1px;
}
 
 

.img-demo img {
     box-shadow: 0 1px 50px #999;
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  transition: 0.5s;
}

.img-demo:hover img {
  -webkit-transform: scale(1.02);
    -moz-transform: scale(1.02);
    -ms-transform: scale(1.02);
    transform: scale(1.02);
} 

.demo-title h2 { 
  font-size: 21px;
  font-weight: 600;
  color: #222222;
  margin: 15px 0 40px 0;
}

.thm-btn{
    background: #37aecc;
    border-radius: 30px;
    display: inline-block;
    color: #fff;
    font-size: 12px;
    font-family: 'Raleway', sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    padding: 12px 35px;
    border: 2px solid transparent;
    transition: all .3s ease
}


.thm-btn:hover,
.thm-btn.inverse {
    background-color: #fff;
    border-color: #37aecc;
    color: #37aecc;
}
.thm-btn:active,
.thm-btn:focus {
    background-color: #fff;
    border-color: #37aecc;
    color: #37aecc;
}
.thm-btn.inverse:hover {
    background: #37aecc;
    border-color: #37aecc;
    color: #fff;
}