:root {
  color-scheme: light;
  --color-bg: #ffffff;
  --color-surface: #f8faf9;
  --color-surface-strong: #eef7f4;
  --color-text: #1f2933;
  --color-muted: #5f6c72;
  --color-border: #d8dee4;
  --color-accent: #0f766e;
  --color-accent-strong: #0b5f59;
  --color-warn: #b93741;
  --color-ai: #0f766e;
  --color-ai-soft: #e8f7f4;
  --color-finance: #9a6700;
  --color-finance-soft: #fff6d9;
  --color-general: #4f5f8f;
  --color-general-soft: #eef1fb;
  --shadow-soft: 0 10px 28px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0;
}

a {
  color: var(--color-accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-warn);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.reading-shell {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.96);
}

.header-inner {
  padding: 22px 0 18px;
}

.brand-block {
  display: grid;
  gap: 5px;
}

.site-title {
  color: var(--color-text);
  font-size: 24px;
  font-weight: 750;
  line-height: 1.3;
  text-decoration: none;
}

.category-tabs,
.month-tabs,
.inline-switch,
.daily-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.category-tabs {
  margin-top: 18px;
}

.category-tab,
.month-tab,
.inline-switch a,
.daily-actions a,
.daily-actions span,
.primary-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 13px;
  background: #ffffff;
  color: var(--color-text);
  font-size: 14px;
  text-decoration: none;
}

.category-tab[aria-current="page"],
.month-tab[aria-current="page"],
.inline-switch a[aria-current="page"] {
  border-color: var(--color-accent);
  background: var(--color-surface-strong);
  color: var(--color-accent-strong);
  font-weight: 700;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--color-accent-strong);
  font-size: 13px;
  font-weight: 750;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.45;
  letter-spacing: 0;
}

h1 {
  max-width: 920px;
  font-size: 34px;
}

h2 {
  font-size: 25px;
}

h3 {
  font-size: 20px;
}

h4 {
  font-size: 16px;
}

.section-block {
  padding: 34px 0;
}

.home-categories {
  padding-top: 40px;
}

.section-heading,
.category-page-header,
.month-heading,
.daily-header {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.section-heading p,
.category-page-header p {
  max-width: 780px;
  margin: 0;
  color: var(--color-muted);
}

.category-page-header {
  grid-template-columns: 1fr auto;
  align-items: end;
}

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

.category-card,
.day-card,
.ranking-toc {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #ffffff;
}

.category-card,
.day-card,
.ranking-toc {
  padding: 20px;
}

.category-card {
  display: grid;
  gap: 16px;
}

.day-card p {
  margin: 0;
  color: var(--color-muted);
}

.category-card dl,
.source-meta {
  display: grid;
  gap: 12px;
  margin: 0;
}

.category-top-ranks {
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

.category-top-ranks h4 {
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.category-top-ranks ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 1.35em;
  font-weight: 700;
}

.category-top-ranks p {
  margin: 0;
  color: var(--color-muted);
}

.category-card dl div,
.source-meta div {
  display: grid;
  gap: 3px;
}

dt {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

dd {
  margin: 0;
}

.day-list {
  display: grid;
  gap: 14px;
}

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

.day-card {
  display: grid;
  gap: 9px;
}

.day-card-date,
.top-rank {
  font-size: 14px;
}

.day-overview-link {
  width: fit-content;
  font-size: 14px;
  font-weight: 700;
}

.top-rank {
  border-top: 1px solid var(--color-border);
  padding-top: 9px;
  color: var(--color-text);
  font-weight: 700;
}

.month-section {
  padding: 24px 0 34px;
  border-top: 1px solid var(--color-border);
}

.month-heading {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.month-tabs,
.inline-switch {
  margin: 18px 0 0;
}

.inline-switch span {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 700;
}

.breadcrumb {
  width: min(1120px, calc(100% - 40px));
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px auto 0;
  color: var(--color-muted);
  font-size: 14px;
}

.daily-article {
  padding: 32px 0 54px;
}

.daily-header h1 {
  font-size: 32px;
}

.daily-actions {
  margin-top: 10px;
}

.daily-actions span {
  color: var(--color-muted);
  background: var(--color-surface);
}

.ranking-toc {
  margin: 26px 0;
  background: var(--color-surface-strong);
}

.ranking-toc h2 {
  margin-bottom: 12px;
}

.ranking-toc ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 24px;
  font-weight: 700;
}

.markdown-body > *:first-child {
  margin-top: 0;
}

.markdown-body > *:last-child {
  margin-bottom: 0;
}

.markdown-body p {
  margin: 0 0 1em;
}

.markdown-body blockquote {
  margin: 18px 0;
  border-left: 4px solid var(--color-border);
  padding: 8px 0 8px 16px;
  color: var(--color-muted);
}

.markdown-body code {
  border-radius: 4px;
  padding: 0.1em 0.35em;
  background: var(--color-surface);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.markdown-body pre {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 16px;
  background: var(--color-surface);
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
}

.rank-section {
  scroll-margin-top: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--color-border);
}

.rank-section:first-of-type {
  border-top: 0;
  padding-top: 4px;
}

.rank-title-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 14px;
  align-items: start;
}

.rank-badge {
  min-width: 62px;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 800;
  line-height: 1;
}

.source-meta {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
  padding: 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
}

.rank-brief {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.rank-brief section {
  border-left: 3px solid var(--color-border);
  padding-left: 14px;
}

.rank-brief h4 {
  color: var(--color-accent-strong);
  font-size: 14px;
}

.rank-brief p {
  margin: 5px 0 0;
}

.rank-more {
  margin-top: 20px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
}

.rank-more summary {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 46px;
  padding: 9px 14px;
  color: var(--color-accent-strong);
  font-size: 14px;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

.rank-more summary::-webkit-details-marker {
  display: none;
}

.rank-more summary:hover {
  color: var(--color-warn);
}

.detail-toggle-icon {
  width: 24px;
  height: 24px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
}

.detail-toggle-icon::before {
  content: "+";
}

.rank-more[open] .detail-toggle-icon::before {
  content: "−";
}

.rank-more-body {
  border-top: 1px solid var(--color-border);
  padding: 18px;
  background: #ffffff;
}

.rank-more-body p {
  margin-bottom: 0.85em;
}

.rank-more-body p:last-child {
  margin-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  justify-content: space-between;
  padding: 24px 0;
  color: var(--color-muted);
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 9px 12px;
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.empty-message {
  margin: 0;
  color: var(--color-muted);
}

.date-browser-header,
.daily-overview-header,
.date-card-main,
.topic-section-heading,
.daily-overview-toc-heading {
  display: grid;
}

.date-browser-header {
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
}

.date-browser-header p,
.topic-section-heading p {
  max-width: 800px;
  margin: 8px 0 0;
  color: var(--color-muted);
}

.archive-summary,
.news-total {
  min-width: 120px;
  display: grid;
  justify-items: center;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 12px 20px;
  background: var(--color-surface);
}

.archive-summary strong,
.news-total strong {
  color: var(--color-accent-strong);
  font-size: 30px;
  line-height: 1.1;
}

.archive-summary span,
.news-total span {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.topic-filter {
  margin-top: 24px;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}

.topic-filter-label {
  display: block;
  margin-bottom: 9px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 750;
}

.topic-filter-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-filter-link {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 7px 17px;
  background: #ffffff;
  color: var(--color-text);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.topic-filter-link[aria-current="page"] {
  border-color: var(--color-text);
  background: var(--color-text);
  color: #ffffff;
}

.topic-filter-link.topic-ai[aria-current="page"] {
  border-color: var(--color-ai);
  background: var(--color-ai);
}

.topic-filter-link.topic-finance[aria-current="page"] {
  border-color: var(--color-finance);
  background: var(--color-finance);
}

.topic-filter-link.topic-general[aria-current="page"] {
  border-color: var(--color-general);
  background: var(--color-general);
}

.date-month-section {
  padding-top: 30px;
}

.date-card-list {
  display: grid;
  gap: 14px;
}

.date-card {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 6px 20px rgba(31, 41, 51, 0.04);
}

.date-card-main {
  grid-template-columns: 190px 1fr;
}

.date-card-date-block {
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 22px;
  background: var(--color-surface-strong);
}

.date-card-date-block time {
  color: var(--color-text);
  font-size: 18px;
  font-weight: 800;
}

.date-card-date-block span {
  color: var(--color-accent-strong);
  font-size: 14px;
  font-weight: 700;
}

.date-card-content {
  padding: 20px 22px;
}

.date-card-content h3 {
  margin-bottom: 12px;
}

.headline-preview {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 14px;
}

.headline-preview li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 10px;
}

.headline-preview span {
  color: var(--color-text);
  font-size: 12px;
  font-weight: 750;
}

.date-card-counts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--color-border);
  padding: 11px 16px;
  background: var(--color-surface);
}

.date-card-counts span {
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 750;
}

.date-card-counts .topic-ai {
  background: var(--color-ai-soft);
  color: var(--color-ai);
}

.date-card-counts .topic-finance {
  background: var(--color-finance-soft);
  color: var(--color-finance);
}

.date-card-counts .topic-general {
  background: var(--color-general-soft);
  color: var(--color-general);
}

.daily-overview {
  padding: 32px 0 60px;
}

.daily-overview-header {
  grid-template-columns: 1fr auto;
  gap: 20px 30px;
  align-items: start;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 28px;
}

.daily-overview-title .lead {
  max-width: 800px;
  margin: 10px 0 0;
  color: var(--color-muted);
}

.overview-actions,
.daily-overview-header .topic-filter,
.topic-count-grid {
  grid-column: 1 / -1;
}

.daily-overview-header .topic-filter {
  margin-top: 0;
}

.topic-count-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.topic-count-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  padding: 11px 14px;
  color: var(--color-text);
  text-decoration: none;
}

.topic-count-card span {
  font-size: 13px;
  font-weight: 700;
}

.topic-count-card.topic-ai {
  background: var(--color-ai-soft);
}

.topic-count-card.topic-finance {
  background: var(--color-finance-soft);
}

.topic-count-card.topic-general {
  background: var(--color-general-soft);
}

.daily-overview-toc {
  margin: 28px 0 10px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
  background: var(--color-surface);
}

.daily-overview-toc-heading {
  grid-template-columns: 1fr auto;
  align-items: center;
  margin-bottom: 12px;
}

.daily-overview-toc-heading span {
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.daily-overview-toc ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 1.5em;
}

.daily-overview-toc a span {
  margin-right: 8px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 700;
}

.topic-news-section {
  scroll-margin-top: 18px;
  margin-top: 34px;
  border-top: 5px solid var(--color-border);
  border-radius: 12px;
  padding-top: 24px;
}

.topic-section-ai {
  border-top-color: var(--color-ai);
}

.topic-section-finance {
  border-top-color: var(--color-finance);
}

.topic-section-general {
  border-top-color: var(--color-general);
}

.topic-section-heading {
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: start;
  margin-bottom: 20px;
}

.topic-section-heading > strong {
  border-radius: 999px;
  padding: 6px 13px;
  background: var(--color-surface);
  font-size: 14px;
}

.daily-category-block {
  margin-top: 20px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  background: #ffffff;
}

.overview-ranking-list {
  margin-top: 0;
}

.overview-ranking-list .rank-title-row {
  grid-template-columns: minmax(120px, auto) 1fr;
}

.overview-ranking-list .rank-badge {
  padding: 8px 12px;
  text-align: center;
}

.empty-state {
  border: 1px dashed var(--color-border);
  border-radius: 12px;
  padding: 28px;
  background: var(--color-surface);
  text-align: center;
}

.empty-state p {
  margin: 8px 0 0;
  color: var(--color-muted);
}

.compact-empty {
  padding: 22px;
}

@media (max-width: 840px) {
  h1,
  .daily-header h1 {
    font-size: 28px;
  }

  .category-grid,
  .compact-list,
  .source-meta,
  .topic-count-grid {
    grid-template-columns: 1fr;
  }

  .category-page-header,
  .month-heading,
  .date-browser-header,
  .daily-overview-header,
  .date-card-main,
  .topic-section-heading {
    grid-template-columns: 1fr;
  }

  .overview-actions,
  .daily-overview-header .topic-filter,
  .topic-count-grid {
    grid-column: auto;
  }

  .archive-summary,
  .news-total {
    width: 120px;
    justify-self: start;
  }

  .headline-preview li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .rank-title-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .shell,
  .reading-shell,
  .breadcrumb {
    width: min(100% - 28px, 1120px);
  }

  body {
    font-size: 15px;
  }

  .site-title {
    font-size: 22px;
  }

  .category-tab,
  .month-tab,
  .inline-switch a,
  .daily-actions a,
  .daily-actions span,
  .primary-link {
    width: 100%;
    justify-content: center;
  }

  .topic-filter-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-filter-link {
    justify-content: center;
    text-align: center;
  }

  .daily-category-block {
    padding: 18px;
  }

  .overview-ranking-list .rank-title-row {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    right: 12px;
    bottom: 12px;
  }
}