* {
    font-family: 'Yeon Sung', cursive;
}

body {
    background-color: ivory;
    background-image: url('https://new-year.spartacodingclub.kr/images/pattern.png');
    background-position: 600px 100px;
    background-repeat: no-repeat;
}

.title {
    color: darkred;
    text-align: center;
    margin: 100px 0 0 50px;
}

.title>h1 {
    font-size: 56px;
    margin-bottom: 0;
}

.rtans {
    display: flex;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    width: 1200px;
    margin: 0 auto;
}

.rtans>a {
    display: block;
    width: 150px;
    height: 150px;
    margin: 10px;
    border-radius: 150px;
    border: 3px solid darkred;
    background-color: white;
    box-shadow: 0px 0px 10px 0px darkred;
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    text-decoration: none;
    font-size: 23px;
}

.rtans>a:hover {
    background-color: darkred;
}

.rtan1 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS1.png');
}

.rtan2 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS2.png');
}

.rtan3 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS3.png');
}

.rtan4 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS4.png');
}

.rtan5 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS5.png');
}

.rtan6 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS6.png');
}

.rtan7 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS7.png');
}

.rtan8 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS8.png');
}

.rtan9 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS9.png');
}

.rtan10 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS10.png');
}

.rtan11 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS11.png');
}

.rtan12 {
    background-image: url('https://new-year.spartacodingclub.kr/images/yearS12.png');
}

/* 모바일 환경 설정 */
@media screen and (max-width: 780px) {
    body {
        background-position: 70px -70px;
        background-size: 500px;
    }

    .rtans {
        width: 100%;
    }

    .title {
        margin-top: 20px;
        margin-bottom: 20px;
    }

    .rtans>a {
        color: darkred;
    }
}