* {
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  margin: 0;
  padding: 0;
  color: #1d2433;
}

.app {
  max-width: 900px;
  margin: 40px auto;
  padding: 20px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.hidden {
  display: none !important;
}

#question-options {
  margin: 20px 0;
}

.option-btn,
.scale-btn,
#start-btn,
#listen-btn,
#next-btn,
#send-manual-btn {
  padding: 12px 16px;
  margin: 8px 8px 8px 0;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background: #0d6efd;
  color: #fff;
}

.option-btn,
.scale-btn {
  background: #eef2f7;
  color: #1d2433;
}

.option-btn.selected,
.scale-btn.selected {
  background: #d9e8ff;
  color: #1d2433;
}

.manual-input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

.intro-text,
.help-text {
  color: #555;
}

.voice-controls,
.nav-actions {
  margin-top: 20px;
}
.nav-controls {
  margin-top: 20px;
  display: flex;
  gap: 12px;
}

#retry-btn,
#back-btn {
  background: #eef2f7;
}