section.header
    height 940px
    position relative
    color: #ffffff
    font-size 17px

    .background
        position absolute
        top -10vh
        left 0
        width 100%
        height calc(100% + 10vh)
        background linear-gradient(135deg, #330867 0%,#31a7bb 100%)
        transform skewY(-5deg)
        box-shadow 0px 0px 50px rgba(60, 117, 162, 0.4)

    .navigation
        position absolute
        top 24px
        right 65px
        font-weight 300

        .item
            display inline-block
            position relative
            vertical-align middle
            padding 10px
            margin 0 7px

            &.github
                background-image url(../../static/svg/github.svg)
                background-repeat no-repeat
                background-position center center
                width 40px
                height 40px

            &.underline
                &::after
                    right 10px
                    bottom 2px
                    left 10px

    .title
        position absolute
        top 210px
        left 50%

        .keppler
            position absolute
            left -60px
            top -40px
            width 259px
            height 77px
            background-image url(../../static/svg/logo-keppler.svg)

        .sky
            position absolute
            left -270px
            top -85px
            width 264px
            height 153px
            background-image url(../../static/svg/logo-sky.svg)

        .avatar
            position absolute
            left -165px
            top -40px
            width 50px
            height 61px
            background-image url(../../static/svg/logo-avatar.svg)
            animation logo-avatar 6s ease-in-out infinite alternate
            will-change transform

            @keyframes logo-avatar
                0%
                    transform translateX(-10px) translateY(-5px) translateZ(0)
                100%
                    transform translateX(10px) translateY(5px) translateZ(0)

    .sub-title
        position absolute
        top 270px
        left 0
        right 0
        text-align center
        line-height 35px
        font-size 25px
        font-weight 300

    .demo
        position absolute
        top 520px
        left 50%
        width 1px
        height 1px
        background #ffffff

        .speaker
            position absolute
            top -150px
            left -245px

            .icon
                position absolute
                left calc(50% - 20px)
                top calc(100% + 10px)
                width 40px
                height 40px
                background-image url(../../static/svg/demo-speaker.svg)
                background-repeat no-repeat
                background-position center center

        .audience
            position absolute
            top -150px
            left -245px

            .icon
                position absolute
                left calc(50% - 20px)
                top calc(100% + 10px)
                width 40px
                height 40px
                background-image url(../../static/svg/demo-audience.svg)
                background-repeat no-repeat
                background-position center center

    .get-started-button
        position absolute
        bottom 130px
        left calc(50% - 117px)
        width 234px
        height 43px
        overflow hidden
        border-radius 22px

        .out
            position absolute
            top 0
            left 0
            width 100%
            height 100%
            border 2px solid #fff
            border-radius 22px
            line-height 39px
            text-align center

        .hover
            position absolute
            top 0
            left 0
            width 100%
            height 100%
            border-radius 22px
            border-radius 22px
            line-height 43px
            text-align center
            overflow hidden
            background #ffffff
            transform translateX(-100%)
            transition transform 0.5s cubic-bezier(0.75, 0, 0.25, 1)
            will-change transform

            .inner
                position absolute
                top 0
                left 0
                width 100%
                height 100%
                color #3473a0
                border-radius 22px
                transform translateX(100%)
                transition transform 0.5s cubic-bezier(0.75, 0, 0.25, 1)
                will-change transform

        &:hover
            .hover
                transform translateX(0%)

                .inner
                    transform translateX(0%)

    .scroll-button
        display block
        position absolute
        bottom 50px
        left calc(50% - 20px)
        width 40px
        height 40px

        .mouse
            display block
            position absolute
            top 7px
            left calc(50% - 9px)
            width 17px
            height 26px
            border-radius 9px
            border 1px solid #fff

            .wheel
                display block
                position absolute
                top 2px
                left calc(50% - 1px)
                width 1px
                height 4px
                background #ffffff
                animation scroll-mouse-wheel 1.5s linear infinite
                will-change transform

                @keyframes scroll-mouse-wheel
                    0%
                        transform translateY(0px) scaleY(0)
                    30%
                        transform translateY(5px) scaleY(1)
                    60%
                        transform translateY(10px) scaleY(0)
                    100%
                        transform translateY(10px) scaleY(0)