html {
    font-size: 16px;
}

body {
    margin: 0;
    background-color: #fff;
    color: #333333;
    font-family:'メイリオ', 'Meiryo','ＭＳ ゴシック','Hiragino Kaku Gothic ProN','ヒラギノ角ゴ ProN W3',sans-serif;
}

body a {
    text-decoration: none;
    color: inherit;
}

#container {
    margin: 0 auto;
}

header {
    width: 60%;
    margin: 0 auto;
    padding: 25px 0 15px 0;
}

header h1 {
    margin: 0;
    font-size: 3em;
    color: #006699;
    font-family: "M PLUS Rounded 1c";
}

header p {
    margin: 0;
    padding-left: 5px;
    font-size: 1em;
    color: #006699;
}
main {
    margin: 0;
}

section {
    width: 60%;
    margin: 0 auto;
}

#main-photo {
    margin: 0 0 25px 0;
}

#main-photo img {
    width: 100%;
    vertical-align: top;
}

#main-introduction {
    margin: 50px 0;
    line-height: 1.6em;
}

.subtitle {
    margin: 50px 0 50px 0;
    font-size: 1.4em;
    color: #336699;
}

#species-container {
    width: 100%;
}

#species-container > div {
    width: 32%;
    margin-right: 2%;
    margin-bottom: 2%;
    float: left;
}

#species-container > div:nth-child(3n) {
    margin-right: 0;
}

#species-container::after {
    content: "";
    display: block;
    clear: both;
}

.species-box {
    position: relative;
}

.species-box img {
    width: 100%;
    vertical-align: top;
}

.species-caption {
    width: 100%;
    margin: 0;
    padding: 5px 0;
    position: absolute;
    bottom: 0px;
    background-color: rgba(0, 0, 0, 0.4);
    color: #fff;
    text-align: center;
}

.species-name {
    font-size: 1rem;
    font-weight: bold;
}

.scientific-name {
    font-size: 0.8rem;
}

.caption-link {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.caption-link:hover {
    background-color: rgba(0, 0, 0, 0.4);
}

#unobserved-species {
    margin: 0;
    line-height: 1.3em;
    text-align: left;
}

#affiliate {
    margin: 75px 0 50px 0;
    text-align: center;
}

.main-logo {
    margin: 75px 0 50px 0;
    text-align: center;
}

.main-logo img {
    vertical-align: top;
}

footer {
    width: 60%;
    margin: 0 auto;
    padding: 25px;
    border-top: 1px solid #999999;
}

footer p {
    text-align: center;
}

@media screen and (max-width: 896px) {
    header {
        width: 100%;
        margin: 0 auto;
        padding: 15px;
    }
    
    header h1 {
        margin: 0;
        font-size: 2em;
    }

    header p {
        padding-left: 10px;
    }

    section {
        width: 100%;
        margin: 0 auto;
        padding: 0 15px;
    }

    .subtitle {
        width: 60%;
        margin: 50px auto;
        line-height: 2em;
        text-align: center;
        border: 1px solid #336699;
        border-radius: 5px;
    }

    #species-container > div {
        width: 49%;
        margin-right: 2%;
        margin-bottom: 2%;
        float: left;
    }
    
    #species-container > div:nth-child(2n) {
        margin-right: 0;
    }

    #species-container > div:nth-child(3n) {
        margin-right: 2%;
    }

    #species-container > div:nth-child(6n) {
        margin-right: 0%;
    }

    #unobserved-species {
        padding: 0 15px;
    }

    .species-name {
        font-size: 0.8rem;
    }
    
    .scientific-name {
        font-size: 0.6rem;
    }

    footer {
        width: 100%;
        margin: 0 auto;
        padding: 15px;
        border: none;
    }

    footer p {
        margin: 0;
        padding: 15px 0;
        border-top: 0.5px solid #999999;
    }
}