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

body {
  height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: Arial, Helvetica, sans-serif;
}

h1 {
  margin-bottom: 40px;
}

.box {
  width: 400px;
  height: 400px;
  background-color: blueviolet;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  box-shadow: 5px 5px 1px rgba(0, 0, 0, 0.5);
}

.question {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.x,
.operator,
.y {
  display: block;
  width: 100px;
  height: 100px;
  font-size: 36px;
  background-color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
}

.answer {
  margin-top: 40px;
}

.answer input {
  font-size: 24px;
  padding: 6px;
  border-radius: 4px;
  outline: none;
  border: none;
}

.buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 16px;
  gap: 10px;
}

.buttons button {
  font-size: 16px;
  padding: 6px;
  font-weight: bold;
  border: none;
  cursor: pointer;
  box-shadow: 1px 1px 1px black;
  transition: all 0.3s;
  border-radius: 2px;
}

button.check-answer {
  background-color: goldenrod;
  color: white;
}

button.skip-question {
  color: goldenrod;
  border: 1px solid goldenrod;
}

.check-answer:active,
.skip-question:active {
  opacity: 0.7;
  box-shadow: none;
}

.result {
  color: rgb(255, 199, 199);
  font-size: 18px;
  margin-top: 50px;
}