/* reset CSS */
*{margin:0; padding:0;}
a{text-decoration: none; color: black;}
a:visited{text-decoration: none; color: black;}
li{list-style: none;}
body{font-family: 'Noto Sans KR', sans-serif;}
h2{font-family: 'Montserrat', sans-serif; font-weight: 400;}
/* common */
.center{
    width:1200px;
    height:inherit;
    margin: 0 auto;
    box-sizing: border-box;
}

/* header */
header{
    height: 150px;
    background:white;
    position: relative;
    box-sizing: border-box;
}
.logo{
    position: absolute; 
    top: 40px;
}
.header_menu{
    float:right;
    margin:20px 0;
    font-size: 14px;
}
.header_menu ul li{
    float:left;
    margin-left:20px;
}
.header_menu ul li a:hover{
    color:#5091ad;
    transition: 0.3s;
}
header .line{
    width:1200px;
    height:1px; 
    background:black;
    position:absolute;
    bottom: 0;
}
/* //header */
/* gnb */
nav{
    height:75px;
    background-color: white;
    text-align: center;
}
.gnb{
    height:75px;
    display: inline-block;
}
.gnb li{
    float:left;
    font-size: 20px;
    margin:0 60px;
    line-height:75px;
}
.gnb li a:hover{
    color:#5091ad;
    transition: 0.3s;
}
/* //gnb */



/* footer */
footer{
    width: 100%;
    height: 200px;
    background: #3e3e3e;
    color: #a4a4a4;
    box-sizing: border-box;
    clear: both;
}
.footer_logo,
.footer_content,
.sns{margin-top: 40px;}

footer a{color:#a4a4a4;}
footer a:visited{
    text-decoration:none; 
    color:#a4a4a4;
}
.footer_logo{
    float: left;
    margin-right: 100px;
}
.footer_content{
    float:left; 
    box-sizing:border-box;
}
.footer_menu{margin-bottom: 20px;}
.footer_menu li{
    float: left; 
    margin-right:30px;
    font-size: 12px;
}
address{
    font-style:normal;
    font-size: 11px;
    margin-bottom: 10px;
}
.footer_info li{
    float: left;
    margin-right: 35px;
    margin-bottom: 25px;
    font-size: 11px;
}
.copyright{font-size: 10px;}
.sns{float:right;}
.sns li{
    float:left;
    margin-left: 10px;
}
/* //footer */
/* topbutton */
.topbutton{
    position: fixed;
    right:20px;
    bottom:20px;
    width: 60px;
    height: 60px;
    text-align: center;
    line-height: 60px;
    font-size: 18px;
    color:lightgray;
    border: 3px solid rgba(180, 180, 180, 0.8);
    border-radius: 60px;
    background: rgba(255,255,255, 0.8);
    z-index: 999;
    display: none;
}
.topbutton a{
    display: block;
    width: 60px;
    height: 60px;
    color: darkgray;
}
.topbutton a:visited{color: darkgray;}