/* shared.css — 宠研肠道专家 公共样式 */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f7fb;
  color: #222;
}

/* 顶栏 */
.topbar {
  background: #ffffff;
  border-bottom: 1px solid #e9edf5;
  padding: 12px 14px 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.topbar .title {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.topbar .sub {
  margin-top: 4px;
  font-size: 12px;
  color: #666;
  line-height: 1.5;
}

/* 返回按钮 */
.back-link {
  display: inline-block;
  font-size: 13px;
  color: #2563eb;
  text-decoration: none;
  padding: 0;
  margin-bottom: 2px;
  line-height: 1.4;
}

.back-link::before {
  content: "< ";
}

/* 通用按钮 */
.btn-primary {
  border: none;
  background: #2563eb;
  color: #fff;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  border: none;
  background: #e8eefc;
  color: #1f3f8f;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}