main {
  margin-top: 6.3rem;
  min-height: calc(100vh - 16.5rem);
}
#wrap {
  max-width: 768px;
  margin: 0 auto;
}

/* HEADER */
header {
  padding: 2rem;
  border-bottom: 1px solid #ddd;
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 768px;
  z-index: 999;
  background: #fff;
}
header a {
  width: fit-content;
  display: block;
  font-size: 2.2rem;
  font-weight: 600;
  background: url("../img/lottery.png") no-repeat 0 50% / 2rem;
  padding-left: 3rem;
}
header a em {
  font-weight: 800;
  color: #28672b;
}
header .menu {
  position: absolute;
  top: 50%;
  right: 2rem;
  transform: translateY(-50%);
  width: 2.4rem;
  height: 2.4rem;
  background: url("../img/menu.png") no-repeat center / 2.4rem;
  text-indent: -9999px;
}
nav {
  display: none;
  position: fixed;
  top: 6.3rem;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 768px;
  z-index: 999;
  background: #467148;
}
nav ul li:not(:last-child) a {
  border-bottom: 1px solid #679369;
}
nav ul li a {
  display: block;
  font-size: 1.8rem;
  font-weight: 600;
  color: #fff;
  padding: 1.5rem;
  text-align: center;
}

/* FOOTER */
footer {
  padding: 3rem 2.5rem;
  background: #476b48;
  text-align: center;
}
footer p {
  font-size: 1.4rem;
  color: #fff;
  line-height: 1.5;
}

#top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 4.5rem;
  height: 4.5rem;
  opacity: 0.9;
  background: url("../img/top.png") no-repeat center / contain;
  text-indent: -9999px;
}