.container {
    width: 1150px;
    margin: 0 auto;
    border: solid 1px black;
}
.center {
    text-align: center;
}
.w500px {
    width: 500px;
}
.c-block-center {
    display: block;
    margin: 0 auto;
}
.margin-15{
    margin: 15px;
}
.padding-15{
    padding: 15px;
}
.margin-top-15{
    margin-top: 15px;
}
.margin-bottom-15{
    margin-bottom: 15px;
}