@charset "UTF-8";

* {
  margin: 0;
  padding: 0 ;
  list-style: none;
  text-decoration: none;
}

#wrap {
  width: 84%;
  max-width: 1280px;
  margin: 0 auto;
}

header {
  background: #333;
  color: #FFF;
  padding: 20px;
  position: sticky;
  top: 0;
}

.main-menu {
  background: #333;
  position: absolute;
  top: 20px;
  right: 20px;
}

.main-menu ul {
  display: flex;
  justify-content: center;
}

.main-menu ul li a {
  color: #FFF;
  display: block;
  padding: 10px 20px;
}

.main-menu ul li a:hover {
  background: #222;
}

main {
  display: flex;
  flex-direction: row-reverse;
  height: 1200px;
}

section {
  background: #EEE;
  flex: 3;
  padding: 20px;
}

article {
  background: #FFF;
  padding: 20px;
  margin-bottom: 20px;  
}

aside {
  background: #DDD;
  flex: 1;
}

.sub-menu {
  background: #999; 
}

.sub-menu ul li a {
  color: #FFF;
  display: block;
  padding: 10px 20px;
}

.sub-menu ul li a:hover {
  background: #666;
}

footer {
  background: #333;
  color: #FFF;
  padding: 20px;
  text-align: center;
}

a.pagetop {
  display: block;
  width: 50px;
  height: 50px;
  text-align: center;
  box-sizing: border-box;
  padding-top: 12px;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  background-color: #333;
  color: #FFF;
  position: fixed;
  bottom: 0;
  right: 20px;
}

html {
  scroll-behavior: smooth;
}