.main-cat {
    position: relative;
}
.main-cat__box {
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    text-align: center;
}
.main-cat__box__title {
    font-size: 30px;
    font-weight: bold;
}

header {
    padding: 30px 0;
    border-bottom: 1px solid #f0f0f0;
}
.main-nav {
}

.main-nav li {
    display: inline-block;
    list-style: none;
}
.main-nav li a{
    color: #000;
    text-decoration: none;
    border: none;
    padding: 10px 20px;
}
.mr0 {
    margin-bottom: 0;
}
.text-right {
    text-align: right;
}

.intro {
    padding-bottom: 0;
}

.main-cat {
    padding-top: 0;
}

.header-section {
    margin: 0;
}