.learning-tool {
  min-width: 0;
  margin: 44px 0;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid rgba(16, 21, 43, 0.28);
  border-top: 5px solid var(--yellow, #d9ff45);
  border-radius: 12px;
  background: var(--paper-2, #fffdf8);
  color: var(--ink, #10152b);
}
.learning-tool [hidden] { display: none !important; }
.article-body .learning-tool h2 { margin-top: 0; font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1.08; }
.learning-tool > .eyebrow { margin-bottom: 16px; }
.learning-tool > p { font-size: 0.94rem; }
.learning-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.learning-field { min-width: 0; }
.learning-field label { display: block; min-height: 3.1em; margin-bottom: 8px; font-size: 0.85rem; font-weight: 800; line-height: 1.5; }
.learning-field input {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid #737786;
  border-radius: 6px;
  background: #fff;
  color: var(--ink, #10152b);
  font: inherit;
  font-variant-numeric: tabular-nums;
}
.learning-field input:focus-visible,
.learning-submit:focus-visible,
.learning-method summary:focus-visible { outline: 3px solid #15244d; outline-offset: 3px; }
.learning-field input[aria-invalid="true"] { border: 2px solid #a32019; }
.learning-field small { display: block; margin-top: 7px; color: #565d70; font-size: 0.74rem; line-height: 1.5; }
.learning-tool .learning-error { margin: 8px 0 0; color: #a32019; font-size: 0.8rem; font-weight: 700; line-height: 1.5; }
.learning-form { margin: 24px 0; }
.learning-form .learning-input-note { margin: 14px 0 0; color: #565d70; font-size: 0.76rem; }
.learning-submit { max-width: 100%; margin-top: 18px; cursor: pointer; }
.learning-results { margin-top: 22px; padding: 18px; border: 1px solid var(--line, #d2d0cb); border-radius: 8px; background: #f2eee4; }
.learning-result-title { margin: 0 0 16px; font-size: 0.84rem; font-weight: 800; }
.learning-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; margin: 0; }
.learning-metrics div { min-width: 0; }
.learning-metrics dt { color: #565d70; font-size: 0.76rem; line-height: 1.5; }
.learning-metrics dd { margin: 5px 0 0; font-size: clamp(1.15rem, 2vw, 1.45rem); font-weight: 850; line-height: 1.3; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.learning-metrics--mines > div:last-child { grid-column: 1 / -1; }
.learning-meter-label { display: block; margin-top: 20px; color: #565d70; font-size: 0.76rem; }
.learning-tool meter { display: block; width: 100%; height: 22px; margin: 4px 0 12px; accent-color: #485d00; }
.learning-tool meter::-webkit-meter-bar { border: 1px solid #8d919c; background: #fff; }
.learning-tool meter::-webkit-meter-optimum-value { background: #485d00; }
.learning-tool meter::-moz-meter-bar { background: #485d00; }
.learning-result-note { margin: 8px 0 0; font-size: 0.8rem; }
.learning-status { margin: 14px 0 0; color: #454d63; font-size: 0.8rem; }
.learning-status:empty { display: none; }
.learning-tool .learning-limits { margin: 20px 0 0; font-size: 0.84rem; }
.learning-fallback { font-size: 0.82rem; }
.learning-method { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line, #d2d0cb); font-size: 0.83rem; }
.learning-method summary { padding: 4px 0; font-weight: 800; cursor: pointer; }
.learning-method p { margin: 14px 0 0; }
.learning-method a { text-underline-offset: 3px; }
@media (max-width: 620px) {
  .learning-fields { grid-template-columns: 1fr; gap: 18px; }
  .learning-field label { min-height: 0; }
  .learning-submit { width: 100%; }
  .learning-results { padding: 15px; }
}
@media (max-width: 380px) {
  .learning-metrics { grid-template-columns: 1fr; }
}