.header {
    position: relative;
    height: 100vh;
    min-height: 600px;
    @include flex;
    align-items: center;  
    justify-content: center;  
    background-image: url(../imgs/header.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;

    .overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: linear-gradient(to top, $white 0%, rgba($primary, .35) 99%, rgba($primary, .5) 100%);
    }

    .header-content {
        margin-top: 20px;
        flex-grow: 1;
        max-width: 550px;
        
        .header-title {
            
            .up {
                font-size: calc(30px + (60 - 30) * ((100vw - 300px) / (1300 - 300)));
                font-weight: 500;
                color: #444;
                margin-bottom: 5px;
                position: relative;
                display: block;
            }

            .down {
                font-size: calc(30px + (75 - 30) * ((100vw - 300px) / (1300 - 300)));
                margin-bottom: 0;
                position: relative;
                display: block;
            }
        }

        .header-subtitle {
            font-size: calc(10px + (22 - 10) * ((100vw - 300px) / (1300 - 300)));           
            letter-spacing: calc(1px + (7 - 1) * ((100vw - 300px) / (1300 - 300)));
            opacity: .8;
            margin-top: -10px;
            margin-bottom: 20px;            
        }

        .btn {
            position: relative;
            margin-top: 20px;
            border-radius: 20px;
            padding: 8px 15px;
        }
    }

     // header title
    &-title {
        font-size: 2.4rem;
        font-weight: bold;
        opacity: .8;
        color: $body-color;
    }

    // header mini
    &-mini {
        min-height: 24rem;
        height: 24rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 1rem;
        background: lighten($primary, 20%);
    }
}

@include media-breakpoint-down(md) {
    .header {
        background-size: cover;
    }

    .header-content {
        padding-left: calc(100% / 5) !important;
    }
}