* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  background: linear-gradient(45deg, white, yellow, orange);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100%;
}
h1 {
  padding-top: 10px;
  text-align: center;
}
.quiz-container {
  background-color: gold;
  border: 1px solid black;
  border-radius: 10px;
  box-shadow: 10px 10px 25px black;
  width: 500px;
  height: 470px;
  position: relative;
}
#btn {
  background-color: black;
  border: none;
  color: white;
  font-size: 1.2rem;
  display: block;
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
  border-radius: 0 0 10px 10px;
  cursor: pointer;
}
#btn:hover {
  color: black;
  background-color: gray;
  cursor: pointer;
}

.heading2 {
  font-size: 3rem;
  text-align: center;
  padding: 20px;
}
#quiz-question {
  font-size: 1.5rem;
  text-align: center;
  padding: 20px;
}
ul {
  list-style: none;
  margin-left: 30px;
}
li {
  font-size: 1.2rem;
  margin-bottom: 15px;
  padding: 10px;
  cursor: pointer;
  font-weight: 700;
}
#submit {
  background-color: black;
  border: none;
  color: white;
  font-size: 1.2rem;
  display: block;
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
  border-radius: 0 0 10px 10px;
  cursor: pointer;
}
#submit:hover {
  color: black;
  background-color: gray;
  cursor: pointer;
}

@media (max-width: 600px) {
  .quiz-container {
    width: 90%;
    height: auto;
    padding: 20px;
    box-shadow: none;
  }

  .heading2 {
    font-size: 2rem;
  }

  #quiz-question {
    font-size: 1.2rem;
  }

  li {
    font-size: 1rem;
    margin-bottom: 10px;
    padding: 8px;
  }

  #btn, #submit {
    font-size: 1rem;
    padding: 10px;
  }
}