/* 学习手札沿用原站纸色与编辑式阅读列表。 */
.learning-page [hidden] { display: none !important; }
.learning-kicker { color: var(--forest-ui); font-size: .8rem; letter-spacing: .1em; margin-bottom: .7rem; }
.learning-entry { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem 4rem; padding-block: 2rem; margin-bottom: 1.2rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.learning-entry h2 { color: var(--forest-dark); font-size: 2rem; line-height: 1.4; letter-spacing: -.02em; margin-bottom: .6rem; }
.learning-entry h2 a:hover { color: var(--forest); }
.learning-entry-copy > p:not(.learning-kicker) { max-width: 26rem; color: var(--muted); font-size: .95rem; line-height: 1.85; margin-bottom: 1rem; }
.learning-entry .text-link { font-size: .9rem; }
.learning-entry-topics { display: grid; grid-template-columns: 1fr 1fr; align-content: start; gap: 0 2rem; }
.learning-entry-topics > a { display: flex; align-items: center; justify-content: space-between; gap: .6rem; min-height: 50px; padding-block: .65rem; border-bottom: 1px solid var(--line); color: var(--forest-dark); font-size: .95rem; }
.learning-entry-topics > a:hover { color: var(--rust); }
.learning-hero { padding-block: clamp(2rem, 4vw, 3.5rem) 2rem; }
.learning-hero h1 { font-size: clamp(2.7rem, 5vw, 4.4rem); color: var(--forest-dark); line-height: 1.25; margin: .6rem 0 1.1rem; letter-spacing: -.035em; }
.learning-hero > p { max-width: 45rem; color: var(--muted); font-size: 1rem; line-height: 1.85; margin-bottom: .65rem; }
.learning-hero > .learning-lead { color: var(--ink); font-size: 1.2rem; }
.learning-hero > .learning-kicker { color: var(--forest-ui); font-size: .8rem; }
.learning-topic-nav { display: flex; flex-wrap: wrap; gap: .4rem .65rem; padding-block: .8rem 1.1rem; border-bottom: 1px solid var(--line); }
.learning-topic-nav > a { display: inline-flex; align-items: baseline; gap: .5rem; min-height: 44px; padding: .65rem .85rem; color: var(--forest-ui); border-radius: 3px; font-size: .95rem; }
.learning-topic-nav > a:hover { background: var(--sage-light); }
.learning-topic-nav > a[aria-current="page"] { color: var(--paper-bright); background: var(--forest-dark); }
.learning-topic-nav > a > span:last-child { font-size: .75rem; opacity: .8; }
.learning-timeline { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem 3rem; padding-block: 1.8rem; border-bottom: 1px solid var(--line); }
.learning-timeline h2 { font-size: 1.4rem; line-height: 1.5; letter-spacing: 0; margin-bottom: .45rem; }
.learning-timeline p { color: var(--muted); max-width: 44rem; font-size: .9rem; line-height: 1.85; margin: 0; }
.learning-timeline > a { flex-shrink: 0; font-size: .9rem; }
.learning-archive { padding-block: 2.4rem 1rem; }
.learning-list-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .4rem 2rem; margin-bottom: 1.1rem; }
.learning-list-heading h2 { font-size: 1.7rem; line-height: 1.4; letter-spacing: -.02em; margin: 0; }
.learning-list-heading > p { font-size: .8rem; color: var(--muted); margin: 0; }
.learning-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .8rem 1.5rem; padding-bottom: 1rem; }
.learning-tools .search-box { flex: 1; max-width: 32rem; }
.learning-tools .search-box input { width: 100%; }
.learning-formats { display: flex; flex-wrap: wrap; gap: .5rem; }
.learning-formats button, .learning-reset { min-height: 44px; background: transparent; color: var(--forest-ui); border: 1px solid var(--line); border-radius: 3px; padding: .45rem .8rem; font-size: .85rem; cursor: pointer; }
.learning-formats button[aria-pressed="true"] { color: var(--paper-bright); background: var(--forest-dark); border-color: var(--forest-dark); }
.learning-empty { color: var(--muted); padding: 2rem 0; line-height: 1.9; }
.learning-empty p { margin-bottom: .6rem; }
.learning-afterword { padding-block: 2rem 3rem; border-top: 1px solid var(--line); }
.learning-afterword p { color: var(--muted); font-size: .9rem; line-height: 1.85; }
.learning-afterword p a { color: var(--forest); text-decoration: underline; text-underline-offset: 3px; margin-inline: .2em; }
.learning-afterword > a { font-size: .9rem; }
.learning-page .article-row h3 { color: var(--forest-dark); }
@media (max-width: 760px) {
  .learning-entry { grid-template-columns: 1fr; gap: 1.1rem; padding-block: 1.5rem; }
  .learning-entry h2 { font-size: 1.8rem; }
  .learning-entry-topics { gap: 0 1.3rem; }
  .learning-entry-topics > a { font-size: .9rem; }
  .learning-hero { padding-top: 1.5rem; }
  .learning-hero h1 { font-size: 2.8rem; }
  .learning-hero > .learning-lead { font-size: 1.05rem; }
  .learning-hero > p { font-size: .95rem; }
  .learning-desktop-break { display: none; }
  .learning-topic-nav { gap: .3rem; }
  .learning-topic-nav > a { padding-inline: .7rem; font-size: .875rem; }
  .learning-timeline { display: block; padding-block: 1.5rem; }
  .learning-timeline > a { margin-top: .8rem; }
  .learning-list-heading h2 { font-size: 1.55rem; }
  .learning-archive { padding-top: 1.8rem; }
  .learning-tools .search-box { min-width: 100%; }
}