* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #22294c;
  background: radial-gradient(circle, rgb(69, 92, 110) 0%, rgb(51, 61, 79) 40%, rgb(0, 9, 26) 100%);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.counter {
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.counter h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}
.counter #display {
  font-size: 4rem;
  font-weight: bold;
  margin-top: 50px;
  margin-bottom: 20px;
}
.counter .icon-big {
  width: 300px;
  margin-bottom: 20px;
}
.counter .buttons {
  display: flex;
  margin-top: 20px;
  gap: 20px;
}
.counter .buttons button {
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  padding: 7px 12px;
  font-size: 1.2rem;
  border: 1px solid black;
  border-radius: 10px;
  background-color: transparent;
  box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.5);
}
.counter .buttons button img {
  width: 20px;
  height: 20px;
  margin-left: 5px;
}
.counter .buttons button #gunkan {
  width: 25px;
  height: 20px;
}
.counter .buttons button #gyoza {
  width: 20px;
  height: 25px;
}
.counter .buttons button:hover {
  background-color: rgba(255, 255, 255, 0.75);
  color: black;
}

.minusImg {
  filter: saturate(20%);
}

footer {
  position: absolute;
  bottom: 10px;
  right: 10px;
  color: black;
  font-size: 0.8rem;
}
footer a {
  color: black;
  text-decoration: none;
}
footer a:hover {
  color: white;
  font-size: 0.85rem;
}

@media screen and (max-width: 810px) {
  footer {
    display: none;
  }
}
@media screen and (max-width: 470px) {
  .buttons {
    flex-wrap: wrap;
    justify-content: center;
  }
}