.reader-article {
  width: 100%;
  max-width: 880px;
  min-width: 0;
  margin: 0 auto;
  color: var(--foreground, #1a1f36);
  font-size: var(--reader-font-size, 17px);
  line-height: 1.9;
  overflow-wrap: anywhere;
}
.reader-article *, .reader-article *::before, .reader-article *::after { box-sizing: border-box; }
.reader-toc, .reader-overview {
  margin: 0 0 14px;
  overflow: hidden;
  background: #fff;
  border: 2px solid var(--card-border, #e8e0d4);
  border-radius: 18px;
}
.reader-toc > summary, .reader-overview > summary {
  padding: 14px 18px;
  min-height: 52px;
  cursor: pointer;
  font-weight: 700;
  color: var(--navy, #1a1f36);
}
.reader-toc > summary span { margin-left: 8px; color: #657287; font-size: 13px; font-weight: 400; }
.reader-toc[open] > summary, .reader-overview[open] > summary { border-bottom: 1px solid var(--card-border, #e8e0d4); }
.reader-toc-links { display: grid; padding: 8px; max-height: min(55vh, 460px); overflow-y: auto; overscroll-behavior: contain; }
.reader-toc-link {
  appearance: none;
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--navy, #1a1f36);
  font: inherit;
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  overflow-wrap: anywhere;
}
.reader-toc-link:hover, .reader-toc-link:focus-visible { background: var(--primary-lighter, #d1fae5); }
.reader-toc-sub { padding-left: 24px; color: #59677b; }
.reader-outline { margin: 0; padding: 12px 20px 18px 38px; font-size: 14px; max-height: 50vh; overflow-y: auto; }
.reader-outline li { margin: 8px 0; }
.reader-prose { padding: 18px 24px 28px; background: #fff; border: 2px solid var(--card-border, #e8e0d4); border-radius: 22px; box-shadow: var(--clay-shadow, 0 4px 12px #1a1f360d); }
.reader-prose > :first-child { margin-top: 0; }
.reader-prose > :last-child { margin-bottom: 0; }
.reader-heading { scroll-margin-top: 90px; line-height: 1.5; overflow-wrap: anywhere; }
.reader-prose h2 { margin: 34px 0 18px; padding-bottom: 12px; border-bottom: 2px solid #e2efe8; font-size: 22px; color: var(--navy, #1a1f36); }
.reader-prose h3 { margin: 28px 0 14px; padding-left: 12px; border-left: 4px solid var(--primary, #059669); font-size: 19px; }
.reader-prose h4 { margin: 24px 0 12px; font-size: 17px; }
.reader-paragraph { margin: 0 0 18px; }
.reader-explanation { padding: 13px 16px; border-radius: 12px; background: #f5f8f5; color: #465367; font-size: calc(var(--reader-font-size, 17px) - 1px); }
.reader-prose strong { color: #0d6c53; font-weight: 700; }
.reader-prose code { font: inherit; background: #f5f0e8; border-radius: 4px; padding: 1px 4px; }
.reader-list { margin: 12px 0 20px; padding-left: 26px; }
.reader-list li { margin: 9px 0; padding-left: 3px; }
.reader-image { display: block; width: auto; max-width: 100%; height: auto; margin: 18px auto; border-radius: 10px; }
.reader-table-scroll { width: 100%; max-width: 100%; margin: 20px 0; overflow-x: auto; border: 1px solid var(--card-border, #e8e0d4); border-radius: 12px; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; }
.reader-table { width: 100%; min-width: 460px; margin: 0; border-collapse: collapse; table-layout: auto; font-size: calc(var(--reader-font-size, 17px) - 2px); line-height: 1.8; }
.reader-table th, .reader-table td { min-width: 110px; padding: 12px 14px; text-align: left; vertical-align: top; border: 1px solid #e8e8df; overflow-wrap: anywhere; }
.reader-table th { background: #e9f6ef; color: #245d49; font-weight: 700; }
.reader-table td { background: #fff; }
.reader-table tr:nth-child(even) td { background: #fafbf9; }
.reader-word-tools { padding: 18px 20px 12px; margin-bottom: 18px; background: #fff; border: 2px solid var(--card-border, #e8e0d4); border-radius: 20px; scroll-margin-top: 90px; }
.reader-word-tools label { display: block; margin-bottom: 9px; font-weight: 700; }
.reader-word-search { display: block; width: 100%; min-width: 0; min-height: 48px; padding: 12px 14px; border: 2px solid var(--card-border, #e8e0d4); border-radius: 14px; background: #fff; color: var(--foreground, #1a1f36); font: inherit; font-size: 16px; line-height: 1.4; }
.reader-word-search:focus { outline: 2px solid #a7e3c6; outline-offset: 2px; border-color: var(--primary, #059669); }
.reader-word-count { margin: 9px 0 0; color: #607080; font-size: 13px; }
.reader-word-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.reader-word-card { min-width: 0; margin: 0; padding: 18px; border: 2px solid var(--card-border, #e8e0d4); border-bottom-width: 4px; border-radius: 19px; background: #fff; }
.reader-word-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.reader-word-heading h3 { margin: 0; min-width: 0; font-size: calc(var(--reader-font-size, 17px) + 3px); line-height: 1.5; letter-spacing: .01em; color: #174d3e; }
.reader-word-number { flex: none; color: #89919a; font-size: 12px; padding-top: 4px; }
.reader-pronunciation { margin: 8px 0; color: #6a7384; font-size: calc(var(--reader-font-size, 17px) - 2px); line-height: 1.6; }
.reader-word-meaning { margin: 0; line-height: 1.8; font-size: var(--reader-font-size, 17px); }
.reader-word-empty { grid-column: 1 / -1; padding: 40px 20px; background: #fff; border-radius: 18px; text-align: center; color: #59677b; }
.reader-pagination { display: flex; align-items: center; justify-content: center; gap: 16px; margin: 24px 0 8px; }
.reader-pagination > span { min-width: 58px; text-align: center; color: #657287; font-size: 14px; font-variant-numeric: tabular-nums; }
.reader-page-button { appearance: none; min-height: 46px; padding: 10px 18px; border: 2px solid var(--card-border, #e8e0d4); border-bottom-width: 4px; border-radius: 14px; background: #fff; color: var(--foreground, #1a1f36); font: inherit; font-size: 14px; font-weight: 700; cursor: pointer; box-shadow: var(--clay-shadow, 0 2px 6px #1a1f3609); }
.reader-page-button:hover:not(:disabled) { background: var(--primary-lighter, #d1fae5); border-color: #9fd9bd; }
.reader-page-button:disabled { opacity: .45; cursor: default; }
.reader-page-button:focus-visible, .reader-table-scroll:focus-visible, .reader-toc-link:focus-visible, .reader-toc > summary:focus-visible, .reader-overview > summary:focus-visible { outline: 3px solid #76c8a4; outline-offset: 2px; }
@media (max-width: 600px) {
  .reader-article { font-size: var(--reader-font-size, 17px); line-height: 1.9; }
  .reader-prose { padding: 18px 16px 24px; border-radius: 18px; }
  .reader-prose h2 { font-size: 20px; margin-top: 28px; }
  .reader-prose h3 { font-size: 18px; }
  .reader-prose h4 { font-size: 16px; }
  .reader-explanation { padding: 12px; }
  .reader-word-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .reader-word-tools { padding: 16px; }
  .reader-word-card { padding: 16px; }
  .reader-pagination { gap: 10px; }
  .reader-page-button { padding: 10px 15px; }
}