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

body,
html {
 height: 100%;
 width: 100%;
 margin: 0;
 padding: 0;
}

.container {
 display: flex;
 align-items: center;
 justify-content: center;
 width: 100%;
 height: 100%;
 visibility: hidden;
}

.tube {
 position: relative;
 width: 100%;
 height: 24vw;
}

.line {
 position: absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%, -50%);
 line-height: 1;
 margin: 0;
 letter-spacing: -0.6vw;
 font-size: 18vw;
 white-space: nowrap;
 text-align: center;
}

.line div {
 backface-visibility: hidden;
}