* {
    margin: 0px;
    padding: 0px;
}

body{
    font-family: Arial, Helvetica, sans-serif;
    background-color: #12475f;
    color: #fff;
    line-height: 1.6;
    text-align: center; 
}

.container{
    max-width: 960px;
    margin: auto;
    padding: 0 30px;

}
#welcome{
    height: 300px;
}
#welcome h1{
    font-size: 50px;
    line-height: 1.3;
    position: relative;
    animation: heading 3s forwards;

}
@keyframes heading {
    0% {top:-50px;}
    100% {top:200px;}
}
#content{
    position: relative;
    animation: content 3s forwards;
}
@keyframes content {
    0% {left: -100%;}
    100% {left: 0;}
    
}
.button{
    display: inline-block;
    color:#fff;
    text-decoration: none;
    padding: 1rem 2rem;
    border: #fff solid 1px;
    margin-top: 40px;
    animation: btn 6s forwards;
    transition-property: transform;
    transition-duration: 1s;
}
@keyframes btn {
    0% {opacity: 0;}
    50% {opacity: 0;}
    100% {opacity: 1;}
}
.button:hover{
    transform: rotateY(180deg);
}