*,
*::before,
*::after {
  box-sizing: border-box;
  font-family: "Lucida Sans", "Lucida Sans Regular", "Lucida Grande",
    "Lucida Sans Unicode", Geneva, Verdana, sans-serif;
}

:root {
  --light-neutral: #2080da;
  --neutral: #1864ab;
  --correct: #2f9e44;
  --wrong: #e03131;
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background-color: var(--neutral);
}

body.correct {
  background-color: var(--correct);
}

body.wrong {
  background-color: var(--wrong);
}

main {
  width: 800px;
  max-width: 80%;
  padding: 10px;
  background-color: white;
  border-radius: 5px;
  box-shadow: 0 0 10px 2px;
}
#answer-buttons {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 10px;
  margin: 20px 0;
}
.btn {
  padding: 5px 10px;
  border: 2px solid var(--neutral);
  border-radius: 5px;
  background-color: var(--light-neutral);
  color: white;
}
.btn:active {
  position: relative;
  top: 1px;
}
.btn:hover {
  border-color: black;
}
.btn.correct {
  background-color: var(--correct);
}
.btn.wrong {
  background-color: var(--wrong);
}
.start-btn,
.next-btn {
  font-size: 20px;
  font-weight: bold;
  padding: 10px;
}
#controls {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hide {
  display: none;
}