:root {
  --bg: #f5f6fb;
  --card: #fff;
  --text: #222;
  --muted: #666;
  --primary: #2f6bff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 680px;
  margin: 0 auto;
  padding: 16px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

button {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 12px;
  margin-top: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
}

button.secondary {
  background: #8c95a8;
}

input,
textarea {
  width: 100%;
  border: 1px solid #e5e8f0;
  border-radius: 8px;
  padding: 10px;
  margin-top: 6px;
  margin-bottom: 10px;
  font-size: 15px;
}

textarea {
  min-height: 80px;
}

.actions.inline {
  display: flex;
  gap: 8px;
}

.actions.inline button {
  margin-top: 0;
}

.muted {
  color: var(--muted);
}

.preview {
  margin-top: 10px;
  width: 100%;
  border-radius: 8px;
}

.hidden {
  display: none !important;
}

.choice {
  background: #fff;
  color: #222;
  border: 1px solid #d7def0;
}

.choice.active {
  border-color: var(--primary);
  color: var(--primary);
}