body {
  background-color: #333;
}
.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: right;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: red;
  color: white;
}

.topnav .icon {
  display: none;
}
.topbar-phone {
  display: none;
}

@media screen and (max-width: 600px) {
  .topbar-pc {
    display: none;
  }
}

@media screen and (max-width: 600px) {
  .topbar-phone {
    display: block;
  }

}

.box-phone {
  display: none;
  width: 100%;
  background-color: #333;
  padding: 18px;
  text-align: center;
}

.box-phone a {
  padding: 14px 16px;
  color: white;
  font-size: 16px;
}

.open-cart {
  background-color: #555;
  color: white;
  padding: 16px 20px;
  border: none;
  cursor: pointer;
  opacity: 0.8;
  position: fixed;
  bottom: 23px;
  right: 28px;
  width: 280px;
}