html {
  height: 100%;
}
body {
  background-color: rgb(187, 187, 187);
  color: white;
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
.container {
  background-color: rgb(0, 0, 0);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 2px 5px rgba(0, 0, 0, 0.5);
  width: 300px;
}
.js-text {
  font-size: 34px;
  margin-bottom: 10px;
  background-color: rgb(167, 165, 165);
  color: black;
  padding: 2px 15px;
  border-radius: 5px;
  height: 50px;
}

.container button {
  background-color: rgb(48, 48, 48);
  color: white;
  font-weight: bold;
  border: none;
  width: 65px;
  height: 65px;
  border-radius: 55px;
  margin: 4px 2px;
  cursor: pointer;
  font-size: 20px;
}

.container button:hover {
  opacity: 0.5;
}

.container button:nth-child(4) {
  background-color: rgb(169, 112, 6);
}