body {
  font-family: "Helvetica Neue", sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
  padding: 20px;
  max-width: 700px;
  margin: auto;
}

h1 {
  font-size: 1.8em;
  border-left: 6px solid #5ac8fa;
  padding-left: 10px;
  margin-top: 0;
}

.question {
  background: #fff;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.choice {
  background: #e6f7ff;
  padding: 10px;
  border-radius: 6px;
  margin: 10px 0;
  border: none;
  font-size: 1em;
  cursor: pointer;
  width: 100%;
  text-align: left;
}

.choice:hover {
  background: #d4efff;
}

.explanation,
.examples {
  background: #fff;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  margin-bottom: 20px;
}

.examples p {
  margin: 0.4em 0;
}

.hidden {
  display: none;
}