/* Article library */

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(250px, 0.58fr);
  gap: 54px;
  align-items: start;
}

.hero-copy,
.hero-aside,
.article,
.article-section {
  min-width: 0;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  max-width: 660px;
  background: var(--card);
  border: 1px solid var(--ink);
  padding: 0 14px;
}

.search-icon {
  color: var(--accent);
  font-size: 20px;
  line-height: 1;
}

.search-box input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  padding: 13px 0;
}

.search-box input::placeholder {
  color: #94a7b1;
}

.search-hint {
  color: var(--muted);
  font-size: 10px;
  border-left: 1px solid var(--line);
  padding-left: 10px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
  padding: 5px 11px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 700;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.chip-active,
.chip-active:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.home-stats {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.home-stats div {
  min-width: 0;
  padding: 18px 20px 18px 0;
  border-right: 1px solid var(--line);
}

.home-stats div:not(:first-child) {
  padding-left: 20px;
}

.home-stats div:last-child {
  border-right: 0;
}

.home-stats strong,
.home-stats span {
  display: block;
}

.home-stats strong {
  color: var(--ink);
  font-family: ui-serif, Georgia, "Songti SC", serif;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.15;
}

.home-stats span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.library-section {
  padding: 72px 0 88px;
}

.section-heading {
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 0.45fr);
  gap: 40px;
  align-items: end;
}

.section-heading .eyebrow {
  margin-bottom: 9px;
}

.section-heading h2,
.home-note h2 {
  margin: 0;
  font-family: ui-serif, Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  min-width: 0;
  min-height: 290px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 7px 7px 0 var(--accent-soft);
}

.card-topline,
.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.card-number {
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.card-tag {
  padding: 3px 9px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 11px;
  font-weight: 800;
}

.article-card h3 {
  margin: 28px 0 14px;
  font-family: ui-serif, Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: clamp(1.28rem, 2vw, 1.72rem);
  line-height: 1.42;
  overflow-wrap: anywhere;
}

.article-card h3 a:hover {
  color: var(--accent-deep);
}

.article-card > p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.card-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.text-link {
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.text-link:hover {
  color: var(--accent-deep);
}

.home-note {
  padding: 60px 0;
  background: var(--ink);
  color: #e7f0f3;
}

.home-note-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: 64px;
  align-items: end;
}

.home-note .eyebrow {
  color: #7fc2d6;
}

.home-note h2 {
  color: #fff;
}

.home-note-inner > p {
  margin: 0;
  color: #b9cbd3;
  font-size: 14px;
  line-height: 1.9;
}

.archive-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.archive-hero h1 {
  max-width: 980px;
}

.breadcrumb {
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.breadcrumb a:hover {
  color: var(--accent-deep);
}

.breadcrumb span[aria-hidden="true"] {
  color: #9aadb7;
}

.article-hero {
  padding-bottom: 64px;
}

.article-hero .lead {
  color: #405360;
  font-size: clamp(1rem, 1.2vw, 1.08rem);
}

.meta {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--muted);
  font-size: 12px;
}

.meta span::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--accent);
  border-radius: 50%;
  vertical-align: 2px;
}

.hero-aside {
  border-top: 4px solid var(--ink);
  padding-top: 18px;
}

.aside-label {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-aside ol {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  counter-reset: item;
}

.hero-aside li {
  counter-increment: item;
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: #3e505b;
  font-size: 13px;
}

.hero-aside li::before {
  content: "0" counter(item);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
}

.hero-aside a:hover {
  color: var(--accent-deep);
}

.aside-note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 62px;
  padding: 64px 0 84px;
}

.article {
  max-width: 820px;
}

.article-section {
  padding: 0 0 54px;
  margin: 0 0 54px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 100px;
}

.article-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.article h2 {
  margin: 0 0 19px;
  font-family: ui-serif, Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  line-height: 1.28;
}

.article p {
  margin: 0 0 16px;
  color: #354954;
  font-size: 16px;
  line-height: 1.9;
}

.article p:last-child {
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  margin-top: 0;
  background: var(--card);
  border: 1px solid var(--line);
}

.faq-list summary {
  align-items: flex-start;
}

.faq-index {
  flex: none;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.closing-box {
  padding: 26px;
  background: var(--accent-soft);
  border-top: 4px solid var(--accent);
}

.closing-box p {
  font-family: ui-serif, Georgia, "Songti SC", "Noto Serif SC", serif;
  font-size: 1.07rem;
  line-height: 1.95;
}

.article-disclaimer {
  margin-top: 52px;
  padding: 22px 24px;
  border: 1px solid #d9c18d;
  border-left: 4px solid var(--warn);
  background: var(--warn-soft);
}

.article-disclaimer strong {
  color: var(--warn);
  font-size: 13px;
}

.article-disclaimer p {
  margin: 8px 0 0;
  color: #63451d;
  font-size: 13px;
  line-height: 1.8;
}

.toc {
  position: sticky;
  top: 102px;
  align-self: start;
  display: grid;
  gap: 10px;
  padding: 18px 0 0;
  border-top: 2px solid var(--ink);
}

.toc-label {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.toc a {
  color: #465a65;
  font-size: 13px;
  padding: 5px 0;
  border-bottom: 1px solid transparent;
}

.toc a:hover {
  color: var(--accent-deep);
  border-color: var(--accent);
}

.toc-note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.article-pagination {
  padding: 0 0 88px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pagination-card {
  min-width: 0;
  padding: 22px 24px;
  display: grid;
  gap: 7px;
  background: var(--card);
  border: 1px solid var(--line);
}

.pagination-card:hover {
  border-color: var(--accent);
}

.pagination-card span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.pagination-card strong {
  font-family: ui-serif, Georgia, "Songti SC", serif;
  font-size: 1.04rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.pagination-next {
  grid-column: 2;
  text-align: right;
}

.empty-state {
  margin: 18px 0 0;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1000px) {
  .hero-grid,
  .article-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .toc {
    display: none;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .archive-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-note-inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

@media (max-width: 640px) {
  .home-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-stats div:nth-child(2) {
    border-right: 0;
  }

  .home-stats div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .home-stats div:nth-child(3) {
    padding-left: 0;
  }

  .library-section {
    padding: 52px 0 64px;
  }

  .article-grid,
  .archive-grid {
    grid-template-columns: 1fr;
  }

  .article-card {
    min-height: 0;
    padding: 22px;
  }

  .card-footer {
    align-items: flex-end;
  }

  .article-pagination {
    grid-template-columns: 1fr;
    padding-bottom: 64px;
  }

  .pagination-next {
    grid-column: 1;
    text-align: left;
  }

  .home-note {
    padding: 48px 0;
  }

  .article-hero {
    padding-bottom: 46px;
  }

  .meta {
    display: grid;
    gap: 7px;
  }

  .lead,
  .article p {
    overflow-wrap: anywhere;
    word-break: break-word;
  }
}