@charset "utf-8";
@import url(http://fonts.googleapis.com/css?family=Poiret+One);

body {
    height: 4000px;
    font-family: "Poiret One";
    background-color: #ddd;
}

#logo {
    width: fit-content;
    height: 172px;

    position: fixed;
    right: 10px;
    top: 10px;

    box-sizing: border-box;
    box-shadow: 2px 2px 2px 2px gray;
}

#sns {
    position: fixed;
    width: 200px;
    height: 100px;

    display: flex;
    justify-content: space-between;
    align-items: center;

    box-sizing: border-box;
    padding: 15px 30px;
}

#sns li {
    color: #777;
    cursor: pointer;
}

#nav {
    position: fixed;
    left: 30px;
    top: 200px;

    width: 500px;
    height: fit-content;

    display: flex;
    justify-content: space-between;
}

#nav li {
    cursor: pointer;
    color: white;
    font-weight: bold;
    transition: all 0.8s;
}

#nav li.on {
    color: black;
    font-size: 20px;
}

#txt {
    position: fixed;
    top: 35%;
    right: 10px;
    text-align: end;
}

#txt span {
    font-size: 70px;
    color: white;
}

#txt span strong {
    color: #888;
}

#txt p {
    margin-top: 15px;
}

section {
    position: fixed;
    top: 30%;
    left: 0;

    width: 4600px;
    height: 500px;

    display: flex;
    justify-content: space-between;

    overflow: hidden;
}

article {
    width: 200px;
    height: 80%;

    background-color: white;
    box-shadow: 2px 2px 2px 2px gray;
    border-radius: 5px;

    transition: all 0.8s;

    position: relative;
    box-sizing: border-box;
    overflow: hidden;

    cursor: pointer;
}

article.on {
    width: 600px;
    height: 99%;
    box-sizing: border-box;
}

article .small-img {
    width: 200px;
    height: 300px;
}

article .small-h2 {
    width: 100%;
    height: 40px;
    margin-top: 10px;
    padding: 5px 15px;

    box-sizing: border-box;
    overflow: hidden;

    display: flex;
    align-items: center;
    font-weight: 400;
    color: white;
    background-color: #777;
    z-index: 5;
    opacity: 0.8;
}

article .big-h2 {
    opacity: 0;
}

article .big-img {
    width: 0;
    height: 0;
}

article.on .small-img {
    opacity: 0;
}

article.on .small-h2 {
    opacity: 0;
}

article.on .big-img {
    position: absolute;
    left: 0;
    top: 0;

    width: 100%;
    height: 100%;
}

article.on .big-h2 {
    position: absolute;
    width: 100%;
    height: 50px;
    top: 30%;
    width: 100%;
    padding: 5px 15px;

    display: flex;
    align-items: center;
    font-weight: 400;
    color: white;
    background-color: #777;
    z-index: 5;
    opacity: 0.8;
}