body {
    background-color: #000;
    color: #fff;
}

#container {
    width: 360px;
    margin-right: auto;
    margin-left: auto;
    border: #f00 0px solid;
}

.display-none {
    display: none;
}

.footer-content a {
    color: #00bfff;
}

    .footer-content a:hover {
        color: #f00;
    }

#header-navi {
    margin-left:20px;
}
#main {
    margin-left: 0px;
    margin-top: 40px;
    position: relative;
}
#start-buttons {
    position: absolute;
    width: 100%;
    left: 0px;
    top: 200px;
    text-align: center;
}
#start {
    margin-bottom:15px;
}
#go-ranking {
    margin-top:45px;
}
#start, #go-ranking {
    font-weight: bold;
    text-align: center;
	font-size: 18px;
	width: 280px;
    border: none;
    font-size: 16px;
    background-color: #1DA1F2;
    padding: 10px 32px;
    border-radius: 100vh;
    color: white;
    cursor: pointer;
}
#tf-1 {
    position: absolute;
    transform: translate(0px, 0px);
    top: 0px;
    left: 0px;
    color: white;
    font-size: 24px;
}
#ctrl-buttons {
    position: absolute;
    width: 100%;
    left: 0px;
    top: 250px;
    text-align: center;
}
#up, #left, #right {
    width: 130px;
    height: 60px;
    margin: 10px 15px 10px 15px;
    background-color: transparent;
    border: 2px white solid;
    color: white;
    font-weight: bold;
}