body {
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", sans-serif;
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 16px 80px;
  background: #f5f6f8;
  color: #222;
}

h1 { font-size: 22px; margin-bottom: 2px; }
.subtitle { color: #666; margin-top: 0; margin-bottom: 24px; }

#scene-list h3 {
  margin: 20px 0 8px;
  font-size: 15px;
  color: #555;
}

.scene-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  margin-bottom: 8px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
  font-size: 15px;
  cursor: pointer;
}

.scene-item.status-graduated { border-color: #7fbf9c; color: #4b7f62; }
.scene-item.status-due { border-color: #e0a94c; }
.scene-item.status-waiting { color: #999; }

.hidden { display: none !important; }

#practice-panel {
  position: fixed;
  inset: 0;
  background: #fff;
  padding: 24px 20px;
  overflow-y: auto;
}

.close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 22px;
  background: none;
  border: none;
  cursor: pointer;
}

#phrase-area p {
  font-size: 18px;
  margin: 12px 0;
}

.read-sample {
  font-size: 17px;
  line-height: 1.8;
  background: #f0f2f5;
  padding: 16px;
  border-radius: 8px;
}

button {
  font-size: 15px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  background: #fff;
  cursor: pointer;
  margin-right: 8px;
  margin-top: 10px;
}

#play-btn { background: #3b4c7a; color: #fff; border: none; }

.record-row { margin-top: 6px; }

#playback-audio { display: block; margin-top: 12px; width: 100%; }

.judge-row {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
}

.ok-btn { background: #4b7f62; color: #fff; border: none; }
.ng-btn { background: #eee; }

.error {
  background: #f9dede;
  color: #a33;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
}