@import url('https://fonts.googleapis.com/css?family=Roboto');

html {
	/*overflow-Y: scroll;
	overflow: -moz-scrollbars-vertical;*/
	/*overflow-x: scroll;
  overflow: -moz-scrollbars-vertical;*/
	width: 1600px;
	overflow-y: auto;
	overflow-x: auto;
}
/*body 초기화*/
body {
  margin: 0;
  padding: 0;
  font-family: "Roboto", serif;
  display: flex;
  flex-flow: column nowrap;
  justify-content: center;
  align-items: center;
  /*overflow-x: hidden;*/
}

h1 {
  margin: 2em 0 1.5em 0;
}

nav {
  width: 100%;
  display: flex;
  justify-content: center;
  position: relative;
  /*background: linear-gradient(90deg, #051937, #004d7a, #008793, #00bf72, #a8eb12);*/
  background: #051937;
}

ul, li {
  margin: 0;
  padding: 0;
  list-style: none;
}

#main-menu > li {
  float: left;
  position: relative;

  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  text-align: center;
  text-decoration: none;
  letter-spacing: 0.05em;
  display: block;
  /*padding: 14px 36px;*/
  /*padding-top: 10px;
  padding-bottom: 11px;*/
  border-right: 1px solid rgba(0,0,0,0.15);
  text-shadow: 1px 1px 1px rgba(0,0,0,0.2);
}

#main-menu > li > a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  text-align: center;
  text-decoration: none;
  letter-spacing: 0.05em;
  display: block;
  /*padding: 14px 36px;*/
  padding: 10px 30px;
  /*padding: 2px 30px;*/
  border-right: 1px solid rgba(0,0,0,0.15);
  text-shadow: 1px 1px 1px rgba(0,0,0,0.2);
}

#main-menu > li:nth-child(1) > a {x
  border-left: 1px solid rgba(0,0,0,0.15);
}

#sub-menu {
  width: 100%;
  position: absolute;
  background: #182952;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease-in;
}

#sub-menu > li {
  /*padding: 16px 28px;*/
  padding: 5px 5px;
  border-bottom: 1px solid rgba(0,0,0,0.15);
}

#sub-menu > li >  a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  /*text-align: center;*/
  font-size: 13px;
  padding-left: 5px;
}

#main-menu > li:hover #sub-menu {
  opacity: 1;
  visibility: visible;
}

#sub-menu > li >  a:hover {
 text-decoration: underline;
}

section {
  column-width: 15em;
  background: #dadadf;
  padding: 2em 12em;
}