body {
	margin: 0;
	width: 100%;
	height: 100vh;
	font-family: 'Baloo', cursive;
	color: #fff;
	background: linear-gradient(-45deg, #1b32fd, #4b01d4, #980aa5, #0c1991);
	background-size: 400% 400%;
	animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}

@import url('https://fonts.googleapis.com/css?family=Saira+Extra+Condensed');
@import url('https://fonts.googleapis.com/css?family=Rubik&display=swap');
@import url('https://fonts.googleapis.com/css?family=Baloo&display=swap');'

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Baloo', cursive;
    letter-spacing: 1px;
    -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: {
        image: url('https://source.unsplash.com/1920x1080/?nature');
        size: cover;
        position: center center;
    }
}

header {
    text-align: center;
    padding: 0.5rem 0 5rem;
    font-size: 1.25rem;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

li {
    display: inline-flex;
}

a {
    position: relative;
    padding: 1rem 0 0.5rem;
    margin: 0 1.5rem;
    color: white;
    text-decoration: none;
    text-transform: uppercase;
    
    &::after {
        content: '';
        position: absolute;
        left: 50%;
        bottom: 0;
        transform: translateX(-50%) scaleX(0);
        transform-origin: 50% 50%;
        width: 100%;
        height: 1px;
        background-color: rgba(255,255,255,0.8);
        transition: transform 250ms;
    }
    
    &:hover {
        
        &::after {
            transform: translateX(-50%) scaleX(1);
        }
        
    }
    
}

.yuan {
    font-family: 'Rubik', sans-serif;
    text-shadow: 0.1em 0.1em 0.2em ;
}