:root {
    --color-black: black;
    --color-white: white;
    --color-yellow: yellow;
    --color-grey: #000000;
    --time: 2.5s;
    --time-s: 0.3s;
    --vw: 70vw;
}
* {
    box-sizing: border-box;
}

a {
    text-decoration: none;
    color: white;
}

html {
    font-size: 1.5vw;
}

body {
    font-family: "Happiness-Sans-Title", sans-serif;
    min-height: 100vh;
    background-color: var(--color-grey);
    color: #fff;
    font-size: 3rem;
    line-height: 1;
    font-weight: 300;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
}

.container {
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.box {
    cursor: pointer;
    position: relative;
    display: inline-block;
    box-sizing: border-box;
    width: 40vw;
    padding-bottom: 30vw;
    margin: 1vw;
    text-transform: uppercase;
    overflow: hidden;
}

.box__content {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 2vw;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    align-content: center;
}

.box--4 {
    width: 77vw;
    height: 90vh;
}
.box--4 {
    background-color: var(--color-black);
    text-shadow: -1px 0 0 var(--color-white), 0 -1px 0 var(--color-white), 1px 0 0 var(--color-white), 0 1px 0 var(--color-white);
    color: #000;
}
.box--4 span {
    letter-spacing: 0.3vw;
    line-height: 1.3;
    animation: text var(--time) linear infinite running;
}

.link {
    text-decoration: none;
    color: black;
    -webkit-text-stroke: 1px white;
}
.link:hover{
    color: white;
    -webkit-text-stroke: 1px white;
    transition: none;
}