/* common.css */
body {
  font-family: 'Hiragino Kaku Gothic Pro', sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  color: #333;
}

header {
  background-color: #007bff;
  color: white;
  padding: 1em;
  text-align: center;
}

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

nav ul li {
  display: inline;
  margin: 0 1em;
}

nav ul li a {
  color: white;
  text-decoration: none;
}

main {
  max-width: 800px;
  margin: 2em auto;
  padding: 1em;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.passage {
  font-size: 1.1em;
  margin-bottom: 1em;
}

.underline-hint {
  text-decoration: underline;
  cursor: help;
  position: relative;
}

.underline-hint:hover::after {
  content: attr(data-hint);
  position: absolute;
  bottom: 100%;
  left: 0;
  background: #fff;
  border: 1px solid #ccc;
  padding: 0.5em;
  width: 200px;
  z-index: 10;
}

.interactive-options li {
  cursor: pointer;
  margin-bottom: 0.5em;
}

.interactive-options li:hover {
  background-color: #e9ecef;
}

.meta {
  font-size: 0.9em;
  color: #666;
  text-align: right;
}

footer {
  text-align: center;
  padding: 1em;
  background-color: #f1f1f1;
}

.speak {
  cursor: pointer;
}