*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    list-style: none;
    outline: none;
}

body{
    overflow-x: hidden;
}

.header{
    height: 140px;
    background-color: #000;
    z-index: 100;
}

.header a{
    font-weight: 500;
}

.hero{
    height: 700px;
    background: linear-gradient(rgba(0,0,0,0.6),rgba(0,0,0,0.6)), url(nasa+hero.jpg);
    background-size: 100% 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero .col-7{
    margin-top: 10rem;
}

.innovation .col-12{
    width: 1100px;
    height: 490px;
    background: linear-gradient(rgba(0,0,0,0.5),rgba(0,0,0,0.5)), url(photo2.webp);
    background-size: 100% 140%;
    background-position: center;
}

.innovation .col-12 p{
    width: 60%;
}

.category .row .card{
    width: 403px;
    height: 302px;
    background-color: #0A66C2;
    margin-top: 7rem;
}

.circle{
    width: 240px;
    height: 240px;
    background-color: #FC3D21;
    border-radius: 50%;
    position: absolute;
    left: 80px;
    top: -60px;
}

.subscribe{
    height: 550px;
    background-image: linear-gradient(rgba(0,0,0,0.6),rgba(0,0,0,0.6)), url(join-mission.webp);
    background-position: center;
    background-size: 100% 100%;
}

.subscribe button{
    width: 300px;
    height: 60px;
    background-color: #FC3D21;
}

.subscribe button:hover{
    background-color: #FC3D21;
}

.footer{
    background-color: #000000;
}

.footer .col-3 img{
    width: 200px;
}

.facebook{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #1877F2;
    cursor: pointer;
}

.instagram{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-image: url(insta.jpg);
    background-size: 100% 100%;
    cursor: pointer;
}

.x{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #1d1d1d;
    cursor: pointer;
}

.youtube{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #FF0000;
    cursor: pointer;
}

.linkedin{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #0A66C2;
    cursor: pointer;
}

.pinterest{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: #E60023;
    cursor: pointer;
}

.footer-nav{
    width: 85%;
    border-bottom: 3px solid #ffffff;
}