gilles-acezat/user/themes/gilles_acezat/scss/theme/_header.scss

// home
body {
    .blog {
        header {
            height:100vh;
            width: 100%;
            display: inline-flex;
            flex-direction: column;
            align-content: space-around;
            & > div{
              position: fixed;
              &.head{
                width: 100%;
                z-index: 999;
                padding-top: 70px;
                h2 {
                  margin-left: 8px;
                  position: absolute;
                }
                &::after {
                  display: block;
                  content: " ";
                  width: 0%;
                  height: 1px;
                  background: black;
                }

              }
              &.works-mea {
                display: -webkit-inline-box;
                display: -ms-inline-flexbox;
                display: inline-flex;
                align-self: flex-end;
                height: calc(100% - 20px);
                align-items: flex-end;
                .card{
                  &:nth-child(2){
                    margin:0 10px;
                  }
                  &:not(:nth-child(2)){
                    margin: 0;
                  }
                }
              }
              &.scroll{
                width: 100%;
                bottom: 0;
                text-align: center;
              }
            }
        }
        &.down{
          header{
            height: 5rem;
            .head{
              padding:0;
              transition: all 1s 0.9s ease;
              &::after{
                animation: showborder 2.5s 1.5s ease forwards;
              }
              h2{
                opacity: 0;
                margin-left: -100px;
                transition: all 1s ease;
                left: -50%;
              }
            }
          .card{
            &:nth-child(1){
              animation: translateY 1s ease forwards;
            }
            &:nth-child(2){
              animation: translateY 1.3s ease forwards;
            }
            &:nth-child(3){
              animation: translateY 1.6s ease forwards;
            }
          }
          .scroll{
            opacity: 0;
            transition: all 1s ease;
          }
        }
      }
    }
}


// page
body {
    #page-wrapper.item {
        header {
            border-bottom: 1px solid black;
            position: fixed;
            height: 112px;
            top: 0;
            left: 10px;
            right: 10px;
            background: white;
            z-index: 999;
            nav {
              margin-top: 25px;
            }

            h1 {
                color: black;
            }

            h2, .scroll {
                display: none;
            }
        }
    }
}