PasteToBin (Sun Oct 01 2017)

              html, body {
    margin: 0;
    padding: 0;
}

main {
    display: flex;
    background-image: url(iran.png);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 100%;
    width: 100%;
    max-height: 100%;
    max-width: 100%;
    opacity: 0.5;
    align-items: center;
    margin: 5px solid #000;
}

nav::before {
    content: '';
    display: block;
    width: 100%;
    background-image: url(iran_640.png);
    background-position: top;
    background-size: 300px 150px;
    height: 150px;
    background-repeat: repeat-x;
}

nav {
    display: flex;
    margin-top: 0px;
    flex-wrap: wrap;
    justify-content: space-around;
    width: 100%;
    font-family: 'Nosifer', cursive;
    font-size: 25px;
}


.sticky {
    position: fixed;
    height: 150px;
    display: flex;
    text-decoration: none;
    list-style: none;
    font-family: 'Nosifer', cursive;
    font-size: 25px;
    justify-content: space-around;
    border: 1px solid #000;
    flex-wrap: wrap;
    z-index: 99;
    margin-top: -150px;
}

nav > a {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    box-sizing: border-box;
    height: 120px;
    width: 300px;
    background-image: radial-gradient(white 5%, rgb(62, 199, 20));
    box-shadow: 5px 5px 5px 5px rgba(209, 50, 50, 0.76);
    border-bottom-left-radius: 20px;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    border-bottom-right-radius: 20px;
    margin: 20px;
    text-decoration: none;
    color: #000;
    transition: 0.35s cubic-bezier(1, 0, 1, .94);
    text-align: center;
}

nav > a:hover {
    transform: scale(1.2) rotate(5deg) translateY(-5px);
}