*{
    margin:0;
    padding:0;
}
header{
    position: fixed;
	z-index: 2;
	left: 0;
	right: 0;
	top: 0;
	height: 70px;
	padding: 0 1.5em 0 0.5em;
	background-color: #faf14f;
	font-family: 'Montserrat', sans-serif;
    display:block;
}
nav {
	position: fixed;
	z-index: 2;
	left: 0;
	right: 0;
	top: 0;
	height: 70px;
	padding: 0 1.5em 0 0.5em;
	background-color: #faf14f;
	font-family: 'Montserrat', sans-serif;
}
nav .logo img{
	height:60px;
    width:60px;
    padding:5px 0;
}
nav .nav-menu {
	position: absolute;
	right: 1.5em;
	top: 0;
	padding: 0;
	margin: 0;
	list-style: none;
}
nav .nav-item {
	display: inline-block;
}
nav .nav-item > a {
	display: inline-block;
	padding: 0 1.5em;
	line-height: 70px;
	color: black;
	text-decoration: none;
}
nav .dropdown {
	position: relative;
}
nav .dropdown a::after {
	content: '';
	display: inline-block;
	margin-left: .5em;
	vertical-align: middle;
	border-top: .3em solid black;
	border-right: .3em solid transparent;
	border-left: .3em solid transparent;
}
nav .dropdown.show a::after {
	transform: rotate(180deg);
}
nav .dropdown-menu {
	display: none;
	position: absolute;
	left: 0;
	right: 0;
	top: 100%;
	padding: .5em 0;
	margin-top: -.5em;
	border: 1px solid rgba(0,0,0,.3);
	border-radius: .5em;
	background-color: black;
}
nav .dropdown.show .dropdown-menu {
	display: block;
}
nav .dropdown-item {
	display: block;
	padding: 0 1.5em;
	font-size: .875em;
	color: white;
	line-height: 3;
	text-decoration: none;
}
nav .btn-hamburger {
	display: none;
	position: absolute;
	right: 1.5em;
	top: 50%;
	background-color: transparent;
	border: 0;
	cursor: pointer;
	outline: none;
	transform: translateY(-50%);
}
nav .btn-hamburger span {
	display: block;
	width: 30px;
	height: 4px;
	background-color: black;
	margin: 6px;
	border-radius: 2px;
	transition: .3s ease-in-out;
}
nav .btn-hamburger span:nth-child(4),
nav .btn-hamburger span:nth-child(5) {
	position: absolute;
	top: 10px;
	opacity: .5;
}
nav .btn-hamburger span:nth-child(4) {
	transform: rotate(45deg) scale(0);
}
nav .btn-hamburger span:nth-child(5) {
	transform: rotate(-45deg) scale(0);
}
nav.opened .btn-hamburger span:nth-child(4) {
	opacity: 1;
	transform: rotate(45deg) scale(1);
}
nav.opened .btn-hamburger span:nth-child(5) {
	opacity: 1;
	transform: rotate(-45deg) scale(1);
}
nav.opened .btn-hamburger span:nth-child(1),
nav.opened .btn-hamburger span:nth-child(2),
nav.opened .btn-hamburger span:nth-child(3) {
	opacity: 0;
}
@media screen and (max-width: 980px) {
	nav .nav-menu {
		position: fixed;
		left: 0;
		right: 0;
		top: 70px;
		bottom: 100%;
		display: flex;
		flex-direction: column;
		justify-content: start;
		background-color: white;
		transition: bottom .5s ease-in-out;
		overflow: hidden;
	}
	nav.opened .nav-menu {
		bottom: 0;
	}
	nav .nav-item > a {
		display: block;
	}
	nav .dropdown-menu {
		position: relative;
		top: 0;
		margin: 0 1.5em;
	}
	nav .btn-hamburger {
		display: block;
	}
}
footer{
    height: auto;
    width: 100%;
    padding:0;
    background-color: #faf14f;
	font-family: 'Montserrat', sans-serif;
    text-align: center;
    display: block;
}

footer address{
    font-style: normal;
}

footer address a{
    text-decoration: none;
    color:blue;
}

.icons{
    display:flex;
    width:100%;
    height:auto;
    justify-content: center;
    column-gap: 1rem;
    transform-style: preserve-3d;
}

.icons #vk, .icons #tg, .icons #gh{
    width:3rem;
    height:2.25rem;
    font-size: 1.5rem;
    text-align: center;
    border-radius: 50%;
    color:white;
    padding-top: 0.75rem;
    cursor:pointer;
    margin-top:1rem;
    box-shadow: 0px 0px 9px 2.5px rgba(20, 20, 21, 0.45);
    position:relative;
    background:black;
    overflow: hidden;
    transform-style: preserve-3d;
    z-index: 2;
}

.icons a{
    color:white;
}

.icons #vk:after{
    content:'';
    position:absolute;
    background:radial-gradient(rgb(17, 82, 223), rgb(69, 111, 248));
    width:100%;
    height:100%;
    top:-3rem;
    left:0;
    transition:1s ease-in;
    z-index: -1;
}

.icons #tg:after{
    content:'';
    position:absolute;
    background:radial-gradient(rgb(1, 42, 131), rgb(27, 61, 175));
    width:100%;
    height:100%;
    top:-3rem;
    left:0;
    transition:1s ease-in;
    z-index: -1;
}

.icons #gh:after{
    content:'';
    position:absolute;
    background:linear-gradient(to bottom right, rgb(94, 94, 94), rgb(153, 153, 153));
    width:100%;
    height:100%;
    top:-3rem;
    left:0;
    transition:1s ease-in;
    z-index: -1;
}

.icons #vk:hover:after, .icons #tg:hover:after, .icons #gh:hover:after{
    transform:translateY(3rem);
    z-index: -1;
}

main{
    background-image: url(../images/sky.jpg);
    background-size: 100%;
    position:relative;
    margin-top: 70px;
    display:block;
    width:100%;
    height:100vh;
}

.sun{
    height:120px;
    width:120px;
    background-image: url(../images/sun.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:50%;
    top:50%;
    transform: translate(-50%, -50%);
}

main p{
    color:white;
    font-family: system-ui;
    position:relative;
    left:-62px;
    top:-11px;
}

.mercury-outline, .venus-outline, .earth-outline, .mars-outline, .jupiter-outline,
.saturn-outline, .uranus-outline, .neptune-outline{
    border-radius: 50%;
    border:1px dotted #ddd9;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%, -50%);
}

.mercury{
    height:20px;
    width:20px;
    background-image:url(../images/mercury.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:42%;
    top:43%;
    transform: translate(-50%, -50%);
    animation:orbit2 2s linear infinite;
}

@keyframes orbit2{
    from{
        transform:rotate(0deg)translate(70px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(70px) rotate(-360deg);
    }
}

.mercury-outline{
    height:130px;
    width:130px;
}

.venus{
    height:40px;
    width:40px;
    background-image:url(../images/venus.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:42%;
    top:43%;
    transform: translate(-50%, -50%);
    animation:orbit3 10s linear infinite;
}

@keyframes orbit3{
    from{
        transform:rotate(0deg)translate(100px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(100px) rotate(-360deg);
    }
}

.venus-outline{
    height:195px;
    width:195px;
}

.earth{
    height:50px;
    width:50px;
    background-image:url(../images/earth.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:42%;
    top:43%;
    transform: translate(-50%, -50%);
    animation:orbit4 20s linear infinite;
}

@keyframes orbit4{
    from{
        transform:rotate(0deg)translate(150px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(150px) rotate(-360deg);
    }
}

.earth-outline{
    height:300px;
    width:300px;
}

.earth-circle{
    height:65px;
    width:65px;
    border:1px dotted #fff;
    position:relative;
    left:-8px;
    top:-8px;
    border-radius: 40px;
}

.earth-inner{
    height:10px;
    width:10px;
    background-image: url(../images/moon.png);
    border-radius: 50%;
    background-size: cover;
    position:relative;
    transform:translate(-50%, -50%);
    left:45%;
    top:45%;
    animation:orbit5 3s linear infinite;
}

@keyframes orbit5{
    from{
        transform:rotate(0deg)translate(33px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(33px) rotate(-360deg);
    }
}

.mars{
    height:30px;
    width:30px;
    background-image:url(../images/mars.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:46.5%;
    top:46.5%;
    transform: translate(-50%, -50%);
    animation:orbit6 30s linear infinite;
}

@keyframes orbit6{
    from{
        transform:rotate(0deg)translate(185px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(185px) rotate(-360deg);
    }
}

.mars-outline{
    height:370px;
    width:370px;
}

.jupiter{
    height:40px;
    width:40px;
    background-image:url(../images/jupiter.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:45%;
    top:45%;
    transform: translate(-50%, -50%);
    animation:orbit7 60s linear infinite;
}

@keyframes orbit7{
    from{
        transform:rotate(0deg)translate(217px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(217px) rotate(-360deg);
    }
}

.jupiter-outline{
    height:430px;
    width:430px;
}

.saturn{
    height:50px;
    width:50px;
    background-image:url(../images/saturn.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:45%;
    top:45%;
    transform: translate(-50%, -50%);
    animation:orbit8 90s linear infinite;
}

@keyframes orbit8{
    from{
        transform:rotate(0deg)translate(250px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(250px) rotate(-360deg);
    }
}

.saturn-outline{
    height:500px;
    width:500px;
}

.uranus{
    height:30px;
    width:30px;
    background-image:url(../images/uranus.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:48%;
    top:48%;
    transform: translate(-50%, -50%);
    animation:orbit9 200s linear infinite;
}

@keyframes orbit9{
    from{
        transform:rotate(0deg)translate(280px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(280px) rotate(-360deg);
    }
}

.uranus-outline{
    height:560px;
    width:560px;
}

.neptune{
    height:30px;
    width:30px;
    background-image:url(../images/neptune.png);
    border-radius: 50%;
    background-size: cover;
    position:absolute;
    left:48%;
    top:48%;
    transform: translate(-50%, -50%);
    animation:orbit10 400s linear infinite;
}

@keyframes orbit10{
    from{
        transform:rotate(0deg)translate(310px) rotate(0deg);
    }
    to{
        transform:rotate(360deg)translate(310px) rotate(-360deg);
    }
}

.neptune-outline{
    height:620px;
    width:620px;
}

@media screen and (max-width: 768px){
    .sun{
        height:90px;
        width:90px;
    }
    
    .mercury{
        height:15px;
        width:15px;
    }
    
    @keyframes orbit2{
        from{
            transform:rotate(0deg)translate(45px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(45px) rotate(-360deg);
        }
    }
    
    .mercury-outline{
        height:90px;
        width:90px;
    }
    
    .venus{
        height:20px;
        width:20px;
    }
    
    @keyframes orbit3{
        from{
            transform:rotate(0deg)translate(60px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(60px) rotate(-360deg);
        }
    }
    
    .venus-outline{
        height:120px;
        width:120px;
    }
    
    .earth{
        height:30px;
        width:30px;
    }
    
    @keyframes orbit4{
        from{
            transform:rotate(0deg)translate(80px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(80px) rotate(-360deg);
        }
    }
    
    .earth-outline{
        height:160px;
        width:160px;
    }
    
    .earth-circle{
        height:40px;
        width:40px;
        left:-6px;
        top:-6px;
    }
    
    @keyframes orbit5{
        from{
            transform:rotate(0deg)translate(22px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(22px) rotate(-360deg);
        }
    }
    
    @keyframes orbit6{
        from{
            transform:rotate(0deg)translate(110px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(110px) rotate(-360deg);
        }
    }
    
    .mars-outline{
        height:220px;
        width:220px;
    }
    
    .jupiter{
        height:35px;
        width:35px;
    }
    
    @keyframes orbit7{
        from{
            transform:rotate(0deg)translate(130px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(130px) rotate(-360deg);
        }
    }
    
    .jupiter-outline{
        height:260px;
        width:260px;
    }
    
    .saturn{
        height:40px;
        width:40px;
    }

    @keyframes orbit8{
        from{
            transform:rotate(0deg)translate(160px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(160px) rotate(-360deg);
        }
    }
    
    .saturn-outline{
        height:320px;
        width:320px;
    }
    
    .uranus{
        height:20px;
        width:20px;
    }

    @keyframes orbit9{
        from{
            transform:rotate(0deg)translate(190px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(190px) rotate(-360deg);
        }
    }
    
    .uranus-outline{
        height:380px;
        width:380px;
    }
    
    .neptune{
        height:20px;
        width:20px;
    }

    @keyframes orbit10{
        from{
            transform:rotate(0deg)translate(210px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(210px) rotate(-360deg);
        }
    }
    
    .neptune-outline{
        height:420px;
        width:420px;
    }
}

@media screen and (max-width: 420px){
    main p{
        font-size: 8pt;
        left:-35px;
        top:-12px;
    }

    .sun{
        height:50px;
        width:50px;
    }
    
    .mercury{
        height:10px;
        width:10px;
    }
    
    @keyframes orbit2{
        from{
            transform:rotate(0deg)translate(30px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(30px) rotate(-360deg);
        }
    }
    
    .mercury-outline{
        height:60px;
        width:60px;
    }
    
    .venus{
        height:15px;
        width:15px;
    }
    
    @keyframes orbit3{
        from{
            transform:rotate(0deg)translate(40px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(40px) rotate(-360deg);
        }
    }
    
    .venus-outline{
        height:80px;
        width:80px;
    }
    
    .earth{
        height:20px;
        width:20px;
    }
    
    
    @keyframes orbit4{
        from{
            transform:rotate(0deg)translate(55px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(55px) rotate(-360deg);
        }
    }
    
    .earth-outline{
        height:110px;
        width:110px;
    }
    
    .earth-circle{
        height:30px;
        width:30px;
        left:-6px;
        top:-6px;
    }

    .earth-inner{
        height:7px;
        width:7px;
        left:35%;
        top:35%;
    }
    
    @keyframes orbit5{
        from{
            transform:rotate(0deg)translate(15px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(15px) rotate(-360deg);
        }
    }
    
    .mars{
        height:15px;
        width:15px;
    }

    @keyframes orbit6{
        from{
            transform:rotate(0deg)translate(75px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(75px) rotate(-360deg);
        }
    }
    
    .mars-outline{
        height:150px;
        width:150px;
    }
    
    .jupiter{
        height:17px;
        width:17px;
    }
    
    @keyframes orbit7{
        from{
            transform:rotate(0deg)translate(85px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(85px) rotate(-360deg);
        }
    }
    
    .jupiter-outline{
        height:170px;
        width:170px;
    }
    
    .saturn{
        height:25px;
        width:25px;
    }

    @keyframes orbit8{
        from{
            transform:rotate(0deg)translate(95px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(95px) rotate(-360deg);
        }
    }
    
    .saturn-outline{
        height:190px;
        width:190px;
    }
    
    .uranus{
        height:10px;
        width:10px;
    }

    @keyframes orbit9{
        from{
            transform:rotate(0deg)translate(105px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(105px) rotate(-360deg);
        }
    }
    
    .uranus-outline{
        height:210px;
        width:210px;
    }
    
    .neptune{
        height:10px;
        width:10px;
    }

    @keyframes orbit10{
        from{
            transform:rotate(0deg)translate(120px) rotate(0deg);
        }
        to{
            transform:rotate(360deg)translate(120px) rotate(-360deg);
        }
    }
    
    .neptune-outline{
        height:240px;
        width:240px;
    }

    main{
        height: 500px;
    }
}