* {
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background: #1c1f23;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}

.quiz-container {
  width: 100%;
  max-width: 500px;
}

.question-card,
.intro-card {
  opacity: 1;
  transition: opacity 0.4s ease;
}

h1,
h2,
h3 {
  text-align: center;
  margin-bottom: 1rem;
}

p {
  text-align: center;
}

ul {
  padding: 0;
  list-style-type: none;
}

ul li {
  display: flex;
  align-items: center;
  border: 2px solid #333;
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
  background-color: #1e1e1e;
  gap: 0.5rem;
  font-size: 1.1rem;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

ul li:hover {
  background-color: #444;
}

ul li.selected {
  border-color: #fff;
}

ul li label {
  flex: 1;
  word-break: break-word;
}

ul li input,
ul li label {
  cursor: pointer;
}

button {
  background-color: #a4e93d;
  color: #1b1f21;
  border: none;
  display: block;
  width: 100%;
  max-width: 500px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  padding: 1rem;
  touch-action: manipulation;
  transition: background-color 0.3s ease;
}

button:focus {
  background-color: #333;
}

#feedback {
  display: none;
  margin-top: 10px;
  font-weight: bold;
  color: #dc143c;
  transition: opacity 0.3s ease;
}

#feedback.show {
  display: block;
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  .quiz-container {
    max-width: 345px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.1rem;
  }

  p,
  label {
    font-size: 0.95rem;
  }

  button {
    font-size: 0.95rem;
    padding: 0.85rem;
    margin-bottom: 2.5rem;
  }

  ul li {
    padding: 0.85rem;
    font-size: 1rem;
  }

  #feedback {
    font-size: 0.9rem;
    padding: 0.5rem;
  }
}