/*  */
main {
  padding: 72px 36px 36px;
  min-height: 100vh;
  height: 100%;
  box-sizing: border-box;
}

#wrapper {
  min-height: 100vh;
}

/* nav */
nav {
  position: fixed;
  top: 0;
  right: 0;
  padding: 108px 0 0 0;
  width: 360px;
  height: 100%;
  background: var(--c-black);
  box-shadow: -9px 0 18px rgba(0, 0, 0, .18);
  box-sizing: border-box;
  overflow: hidden;
  z-index: 6998;
  transform: translateX(396px);
  transition:
    transform 360ms var(--timing-function);
}

nav.active {
  transform: translateX(0);
}

nav a {
  display: flex;
  align-items: center;
  padding: 18px 27px;
  font-size: 1.8rem;
  color: #fff;
  transition:
    color 180ms var(--timing-function),
    background-color 180ms var(--timing-function);
}

nav a::before {
  margin: 0 18px 0 0;
  font-size: 2.1rem;
}

#nav-filter {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, .72);
  z-index: 6997;
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 360ms var(--timing-function);
}

#nav-filter.active {
  pointer-events: all;
  opacity: 1;
}

#nav-btn {
  position: fixed;
  top: 13px;
  right: 27px;
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, .36);
  cursor: pointer;
  border-radius: 3px;
  z-index: 6999;
  pointer-events: all;
  opacity: 1;
  transition:
    opacity 270ms var(--timing-function);
}

#nav-btn.hide {
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 270ms var(--timing-function);
}

#nav-btn span {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  margin: auto;
  width: 27px;
  height: 3px;
  background: var(--c-black);
  transition:
    opacity 180ms var(--timing-function),
    transform 180ms var(--timing-function);
}

#nav-btn span:nth-child(1) {
  transform: translateY(-9px);
}

#nav-btn span:nth-child(2) {
  opacity: 1;
}

#nav-btn span:nth-child(3) {
  transform: translateY(9px);
}

#nav-btn.active span:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

#nav-btn.active span:nth-child(2) {
  opacity: 0;
}

#nav-btn.active span:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}

/* header */
header {
  position: fixed;
  padding: 27px;
  width: 100%;
  background: #fff;
  box-sizing: border-box;
  z-index: 1990;
}

header .ttl {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--c-gray);
}

header .ttl::after {
  content: attr(ttl);
  margin: 0 0 0 18px;
  color: var(--c-black);
}

header.hide {
  display: none;
}







/* hover */
@media (hover :hover) {
  nav a:hover {
    color: var(--c-blue);
    background: rgba(255, 255, 255, .09);
  }
}