style.css

body { padding-top: 56px; }
.left-aligned { margin-left: auto; }
.bg-dark { background-color: #343a40 !important; }
.bg-hero { background-color: #45b06cff; }

/* CALLOUT */
.bd-callout { padding:1.25rem; margin-top:1.25rem; margin-bottom:1.25rem; border:1px solid #e9ecef; border-left-width:.25rem; border-radius:.25rem }
.bd-callout h4 { margin-bottom:.25rem }
.bd-callout p:last-child { margin-bottom:0 }
.bd-callout code { border-radius:.25rem }
.bd-callout+.bd-callout { margin-top:-.25rem }
.bd-callout-info { border-left-color:#5bc0de }
.bd-callout-warning { border-left-color:#f0ad4e }
.bd-callout-danger { border-left-color:#d9534f }

/* footer */
footer a { color: white; font-weight: bold; text-decoration: none; }
footer a:hover { color: white; text-decoration: underline; }

/*navbar*/
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}



/* HEADER SECTION STYLES*/
.header{
    background: #ffffff;
    ;position: relative;
    max-width: 100vw;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    z-index: 1;
    font-family: 'Nunito', sans-serif;
    top: 0;
    width: 100%;
    box-shadow: 10px #122331;
}


/* -------------------- */
/* only makes the unordered list visible to the user horizontal and not all unordered lists */
.header .menu-items{
    display: flex;                    
    align-items: center;
}
/* -------------------- */


/* --------------------- */
/* makes all unordered list items have no styles */
.header ul{
    list-style: none;
    font-weight: normal;
    margin-right: 80px;
}
/* -------------------- */


.logo{
    padding-left: 80px;
    color:  #122331;
    font-size: 2rem;
    font-weight: bold;
}

.header a{
    text-decoration: none;
    color:  #122331;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease-in-out;
    font-weight: bold;
}
.second{
    color:#6497b1;
}

span{
    padding-right: 5px;
}

.header a:hover{
    background: #6497b1;
    color: #ffffff;
    font-weight: normal;
}
/* end of HEADER SECTION STYLES*/




/* DROPDOWN MENU STYLES */
.dropdown{
    display: relative;
}
.dropdown-menu{
    position: absolute;
    background: #ffffff;
    width: 230px;
    top: 50px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.menu-item{
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.dropdown:hover .dropdown-menu{
    top: 65px;
    opacity: 1;
    visibility: visible;
}
/* end of DROPDOWN MENU STYLES */




/* MEGA MENU STYLES */
.mega-menu{
    position: absolute;
    left: 200;
    width: 80vw;
    top: 80px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mega-menu .content{
    background: #ffffff;
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    width: 100%;
    justify-content: space-between;
}

.mega-menu .content_1{
    background: #ffffff;
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    width: 100%;
    justify-content: space-between;
}

.content .col{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    line-height: 3rem;
}

.content_1 .col{
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    line-height: 3rem;
}

.content .col #mega-links{
    border-left: 1px solid #1a3246;
}


.content_1 .col #mega-links{
    border-left: 1px solid #1a3246;
}

.col .mega-links li{
    padding-left: 0.4rem;
}

/* hover */
.menu-items li:hover .mega-menu{
    top: 65px;
    opacity: 1;
    visibility: visible;
}

/* end of MEGA MENU STYLES */




/* -----------------RESPONSIVENESS --------------------*/

/* HAMBURGER STYLES */
.menu-btn{
    position: relative;
    display: none;
    justify-content: center;
    align-items: center;
    width: 1.5rem;
    height: 1.5rem;
    cursor: pointer;
    z-index: 2;
}
.menu-btn_lines::before, .menu-btn_lines::after{
    content: " ";
    position: absolute;
}

.menu-btn_lines, .menu-btn_lines::before,.menu-btn_lines::after{
    width: 1.5rem;
    height: 0.2rem;
    background: #6497b1;
    transition: all 0.5s ease-in-out;
}

.menu-btn_lines::before{
    transform: translateY(-0.5rem);
}
.menu-btn_lines::after{
    transform: translateY(0.5rem);
}

/* animation */
.menu-btn.open .menu-btn_lines{
    /* targetting middle line */
    transform: translateX(2rem);
    background: transparent;
}

.menu-btn.open .menu-btn_lines::before{
    transform: rotate(45deg) translate(-1.5rem, 1.5rem);
    background: #6497b1;
}

.menu-btn.open .menu-btn_lines::after{
    transform: rotate(-45deg) translate(-1.5rem, -1.5rem);
    background: #6497b1;
}

/* END OF HAMBURGER STYLES */

/* MEDIA QUERIES */
@media screen and (max-width: 970px){
    .menu-btn{
        display: flex;
    }
    .header{
        justify-content: space-between;
        display: flex;
    }
    .header .menu-items{
        position: absolute;
        /* items should begin at the bottom of the header */
        height: calc(200vh - 100%);
        width: 100%;
        max-width: 350px;
        top: 100%;
        right: 0;
        background: #ffffff;
        display: block;
        padding: 1rem;
        line-height: 3rem;
        overflow-y: auto;
        opacity: 0;
        transform: translateY(-10vh);
        transition: all 0.3s ease-out;
        z-index: -1;
    }
    .menu-items.open{
        opacity: 1;
        transform: translateY(0);
    }
    .menu-items li{
        margin: 15px 10px;
    }
    .menu-items li a{
        padding: 0 1rem;
        display: block;
        font-size: 1.2rem;
    }
    .header a:hover{
        background-color: transparent;
        color:  #122331;
        font-weight: normal;
    }

    /* dropdown and mega menu */
    .menu-items .dropdown-menu, .menu-items .mega-menu{
        position: static;
        opacity: 1;
        visibility: visible;
        top: 4rem;
        padding-left: 1rem;
        width: 100%;
        max-height: 0;
        transform: scaleY(0);
        transform-origin: top;
        overflow: hidden;
        transition: all 0.3s ease;
    }
    .expand-btn.open + .expandable{
        max-height: 100%;
        transform: scaleY(1);
    }
    .expandable li{
        margin: 0;
    }
    .expandable li a{
        font-size: 1rem;
    }
    /* styling mega menu elements */
    .mega-menu .content{
        grid-template-columns: auto;
        padding: 1rem 1rem 0 1rem;
        overflow-y: auto
    }

    .mega-menu .content_1{
        grid-template-columns: auto;
        padding: 1rem 1rem 0 1rem;
        overflow-y: auto
    }

    .mega-menu .content .col{
        width: 100%;
        padding-top: 1rem;
        margin-bottom: 0.5rem;
        border-top: 1px solid #1a3246;
    }

    .mega-menu .content_1 .col{
        width: 100%;
        padding-top: 1rem;
        margin-bottom: 0.5rem;
        border-top: 1px solid #1a3246;
    }


    .mega-menu .content .col:nth-child(1){
        border-top: 0px;
    }

    .mega-menu .content_1 .col:nth-child(1){
        border-top: 0px;
    }

    .content .col #mega-links{
        border-left: 0px;
        padding-left: 1rem;
    }

    .content_1 .col #mega-links{
        border-left: 0px;
        padding-left: 1rem;
    }

    .col .mega-links{
        margin: 0;
    }

}
/* MEDIA QUERIES */

/* -----------------end of RESPONSIVENESS SECTION--------------------*/