/* 评论算术验证码：提交按钮左边的胶囊控件（图标 | 题目 | 答案 | 换一题）。颜色用额外CSS里的变量，黑夜模式自动适配 */

#respond .com-form-button { align-items: center; }
#respond .com-form-button-r { display: flex; align-items: center; gap: 10px; }

.ytea-captcha {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 4px 0 12px;
  border: 1px solid var(--line, #dce7f2);
  border-radius: 999px;
  background: var(--paper, #f2f7fc);
  color: var(--ink, #1c2b3a);
  transition: border-color .2s, box-shadow .2s, background .2s;
  user-select: none;
}
.ytea-captcha:focus-within {
  border-color: var(--sky, #5fa8dc);
  box-shadow: 0 0 0 3px rgba(95, 168, 220, .18);
  background: var(--card, #fff);
}

.ytea-captcha-icon { display: flex; color: var(--sky, #5fa8dc); margin-right: 8px; }

.ytea-captcha-q {
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: .5px;
  white-space: nowrap;
  cursor: text;
  transition: opacity .2s;
}

/* 主题和额外CSS对评论框里的 input / button 有 !important 样式，这里用 #respond 提高优先级覆盖 */
#respond .ytea-captcha input.ytea-captcha-a {
  width: 44px !important;
  height: 26px !important;
  margin: 0 2px 0 8px !important;
  padding: 0 4px !important;
  border: 0 !important;
  border-bottom: 2px solid var(--line, #dce7f2) !important;
  border-radius: 0 !important;
  background: transparent !important;
  color: var(--deep, #1d4e89) !important;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: center;
  box-shadow: none !important;
  outline: none;
  transition: border-color .2s;
}
#respond .ytea-captcha input.ytea-captcha-a::placeholder { color: var(--ink-muted, #6b7c8f); opacity: .5; font-weight: 400; }
#respond .ytea-captcha input.ytea-captcha-a:focus { border-bottom-color: var(--sky, #5fa8dc) !important; }

#respond .ytea-captcha button.ytea-captcha-refresh {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px !important;
  min-width: 0 !important;
  height: 28px !important;
  margin-left: 2px;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 50% !important;
  background: transparent !important;
  color: var(--ink-muted, #6b7c8f) !important;
  box-shadow: none !important;
  filter: none !important;
  cursor: pointer;
  transition: color .2s, background .2s;
}
#respond .ytea-captcha button.ytea-captcha-refresh:hover { color: var(--deep, #1d4e89) !important; background: var(--sky-soft, #e4effa) !important; }

/* 加载中：题目变淡，刷新图标转圈 */
.ytea-captcha.is-loading .ytea-captcha-q { opacity: .35; }
.ytea-captcha.is-loading .ytea-captcha-refresh svg { animation: ytea-captcha-spin .7s linear infinite; }

/* 答错：红框 + 抖动 */
.ytea-captcha.is-error {
  border-color: #e5484d;
  box-shadow: 0 0 0 3px rgba(229, 72, 77, .15);
  animation: ytea-captcha-shake .4s;
}
.ytea-captcha.is-error .ytea-captcha-icon { color: #e5484d; }

@keyframes ytea-captcha-spin { to { transform: rotate(360deg); } }
@keyframes ytea-captcha-shake {
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}
@media (prefers-reduced-motion: reduce) {
  .ytea-captcha.is-error, .ytea-captcha.is-loading .ytea-captcha-refresh svg { animation: none; }
}

@media (max-width: 480px) {
  #respond .com-form-button-r { gap: 8px; }
  .ytea-captcha { padding-left: 10px; }
  .ytea-captcha-icon { display: none; }
  .ytea-captcha-q { font-size: 14px; }
}