:root {
      color-scheme: light;
      --bg: #f7f7f9;
      --panel: #ffffff;
      --accent: #1d4ed8;
      --accent-soft: rgba(29, 78, 216, 0.08);
      --text: #111827;
      --muted: #6b7280;
      --border: #e5e7eb;
      font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, -apple-system, sans-serif;
      line-height: 1.6;
    }

    html {
      -webkit-text-size-adjust: 100%;
      text-size-adjust: 100%;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
    }

    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    header {
      padding: 20px 16px 12px;
      text-align: center;
    }

    header h1 {
      margin: 0;
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 700;
    }


    main {
      max-width: min(1100px, 100%);
      margin: 0 auto;
      padding: 0 0 80px;
      display: grid;
    }

    .date-nav-shell {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 16px 16px 8px;
      width: min(1100px, 100%);
      margin: 0 auto;
      box-sizing: border-box;
    }

    .date-nav-shell::after {
      content: "";
      display: none;
    }

    .date-nav-shell__logo {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
    }

    .date-nav-shell__logo img {
      display: block;
      width: 250px;
      max-width: 100%;
      height: auto;
    }

    .date-nav {
      display: flex;
      justify-content: center;
      padding: 12px 16px;
      position: relative;
      z-index: 30;
    }

    .newsletter-cta {
      display: flex;
      justify-content: center;
      margin-top: 16px;
    }

    .newsletter-cta__link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      padding: 12px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff;
      text-decoration: none;
      border-radius: 9999px;
      background-image: linear-gradient(90deg, #2563eb, #7c3aed);
      box-shadow: 0 10px 20px rgba(76, 29, 149, 0.25);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .newsletter-cta__link:hover,
    .newsletter-cta__link:focus-visible {
      transform: translateY(-1px);
      box-shadow: 0 14px 24px rgba(76, 29, 149, 0.3);
    }

    .newsletter-cta__link:focus-visible {
      outline: 3px solid rgba(37, 99, 235, 0.35);
      outline-offset: 2px;
    }

    .newsletter-cta__label {
      letter-spacing: 0.01em;
    }

    .newsletter-cta__icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .newsletter-cta__icon svg {
      width: 18px;
      height: 18px;
    }

    .newsletter-cta--nav {
      display: none;
      margin-left: auto;
    }

    .newsletter-cta--mobile {
      position: fixed;
      left: 50%;
      bottom: calc(16px + env(safe-area-inset-bottom, 0px));
      transform: translateX(-50%);
      width: min(320px, calc(100% - 32px));
      margin: 0;
      z-index: 60;
    }

    @media (max-width: 919px) {
      body {
        padding-bottom: 96px;
      }
    }

.topic-card-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(288px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
}

.topic-card {
  margin: 0;
}

.topic-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: var(--panel);
  border: 1px solid #e8e1ff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.topic-card__body:hover,
.topic-card__body:focus-visible {
  border-color: #c7b8ff;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
  outline: none;
}

.topic-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
}

.topic-card__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-card__count {
  color: var(--muted);
  font-size: 0.875rem;
}

.topic-card__headlines {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-card__headline {
  display: block;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-card__headline--empty {
  font-style: italic;
  color: var(--muted);
}

@media (max-width: 919px) {
  .topic-card-list {
    gap: 0;
  }

  .topic-card__body {
    border-radius: 0;
  }
}
    
    @media (min-width: 920px) {
      .date-nav-shell {
        position: sticky;
        top: 0;
        z-index: 50;
        background: var(--bg);
        flex-direction: row;
        align-items: center;
      }

      .date-nav-shell::after {
        display: block;
        height: 80px;
      }

      .date-nav-shell__logo {
        margin-right: auto;
      }

      .date-nav {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        margin-left: auto;
        margin-right: auto;
        max-width: 100%;
      }

      .newsletter-cta {
        margin-top: 0;
      }

      .newsletter-cta--nav {
        display: flex;
        align-self: center;
      }

      .newsletter-cta--mobile {
        display: none;
      }

    }

    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    .date-switcher {
      display: inline-flex;
      align-items: center;
      gap: 2px;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 2px;
      box-shadow: 0 6px 18px rgba(15, 23, 42, 0.1);
      backdrop-filter: blur(2px);
    }

    .date-switcher__button {
      border: none;
      background: transparent;
      color: var(--muted);
      width: 32px;
      height: 32px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      cursor: pointer;
      transition: background 0.18s ease, color 0.18s ease;
      text-decoration: none;
    }

    .date-switcher__button:not(:disabled):hover,
    .date-switcher__button:not(:disabled):focus-visible {
      background: rgba(29, 78, 216, 0.1);
      color: var(--accent);
    }

    .date-switcher__button--disabled {
      color: rgba(107, 114, 128, 0.4);
      cursor: default;
      pointer-events: none;
    }

    .date-switcher__button--disabled:hover,
    .date-switcher__button--disabled:focus-visible {
      background: transparent;
      color: rgba(107, 114, 128, 0.4);
    }

    .date-switcher__display {
      border: none;
      background: rgba(29, 78, 216, 0.08);
      color: var(--text);
      font-weight: 550;
      font-size: 0.86rem;
      padding: 0 16px;
      min-width: 132px;
      height: 32px;
      border-radius: 999px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.18s ease, color 0.18s ease;
    }

    .date-switcher__display:hover,
    .date-switcher__display:focus-visible {
      background: var(--accent);
      color: #fff;
    }

    .date-switcher__display.is-open {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.2);
    }

    .headline-list {
      position: relative;
      padding: 0 16px 16px;
      display: grid;
      gap: 12px;
      align-content: start;
      border-bottom: 1px solid var(--border);
      background: transparent;
    }

    .headline-list__heading {
      margin: 0;
      font-size: 1.1rem;
      font-weight: 650;
    }

    .headline-list__body {
      position: relative;
      display: block;
    }

    .headline-list.is-ready {
      display: grid;
    }

    .date-picker {
      position: absolute;
      top: calc(100% + 10px);
      left: 50%;
      transform: translateX(-50%);
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 14px;
      width: min(300px, calc(100vw - 32px));
      box-shadow: 0 16px 32px rgba(15, 23, 42, 0.18);
      display: none;
      gap: 14px;
      z-index: 40;
    }

    .date-picker.open {
      display: grid;
    }

    .date-picker__header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .date-picker__title {
      font-size: 0.82rem;
      font-weight: 550;
      color: var(--text);
    }

    .date-picker__close {
      border: none;
      background: transparent;
      color: var(--muted);
      border-radius: 999px;
      width: 28px;
      height: 28px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      transition: background 0.18s ease, color 0.18s ease;
    }

    .date-picker__close:hover,
    .date-picker__close:focus-visible {
      background: rgba(29, 78, 216, 0.1);
      color: var(--accent);
    }

    .calendar-month {
      display: grid;
      gap: 6px;
    }

    .calendar-months {
      display: grid;
      gap: 14px;
      max-height: 280px;
      overflow-y: auto;
      padding-right: 4px;
    }

    .calendar-months::-webkit-scrollbar {
      width: 6px;
    }

    .calendar-months::-webkit-scrollbar-thumb {
      background: rgba(148, 163, 184, 0.6);
      border-radius: 999px;
    }

    .calendar-month + .calendar-month {
      padding-top: 12px;
      border-top: 1px solid rgba(229, 231, 235, 0.6);
    }

    .calendar-month__title {
      font-size: 0.78rem;
      font-weight: 550;
      color: var(--muted);
      text-align: left;
    }

    .calendar-weekdays,
    .calendar-grid {
      display: grid;
      grid-template-columns: repeat(7, minmax(0, 1fr));
      gap: 4px;
    }

    .calendar-weekdays span {
      text-align: center;
      font-size: 0.68rem;
      font-weight: 550;
      color: var(--muted);
    }

    .calendar-cell {
      text-align: center;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--muted);
      padding: 6px 0;
      border-radius: 8px;
    }

    .calendar-day {
      border: none;
      background: transparent;
      color: var(--muted);
      font-size: 0.86rem;
      font-weight: 500;
      padding: 6px 0;
      border-radius: 8px;
      cursor: default;
      transition: background 0.18s ease, color 0.18s ease;
    }

    .calendar-day:disabled {
      color: rgba(156, 163, 175, 0.5);
    }

    .calendar-day.calendar-day--available {
      color: var(--text);
      cursor: pointer;
    }

    .calendar-day.calendar-day--available:hover,
    .calendar-day.calendar-day--available:focus-visible {
      background: rgba(29, 78, 216, 0.1);
      color: var(--accent);
    }

    .calendar-day.calendar-day--selected {
      background: var(--accent);
      color: #fff;
      font-weight: 600;
    }

    .calendar-day.calendar-day--today {
      box-shadow: inset 0 0 0 2px rgba(29, 78, 216, 0.35);
    }


    .headline-list ul {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 0;
      column-gap: 12px;
      position: relative;
      grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .headline-toggle {
      justify-self: end;
      align-self: start;
    }

    .pill-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      border-radius: 999px;
      border: 1px solid rgba(29, 78, 216, 0.3);
      background: rgba(232, 238, 255, 0.75);
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 6px 14px;
      line-height: 1.15;
      cursor: pointer;
      box-sizing: border-box;
      transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
    }

    .pill-button[hidden] {
      display: none !important;
    }

    .pill-button:hover,
    .pill-button:focus-visible {
      background: rgba(29, 78, 216, 0.16);
      border-color: rgba(29, 78, 216, 0.38);
      color: var(--accent);
      transform: translateY(-1px);
    }

    .pill-button:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.2);
    }

    .pill-button:active {
      transform: translateY(0);
      background: rgba(29, 78, 216, 0.12);
      box-shadow: none;
    }

    .headline-list.is-collapsed .headline-toggle {
      position: absolute;
      right: 16px;
      bottom: 0;
      z-index: 2;
      transform: translateX(0);
    }

    .headline-list.is-collapsed ul::after {
      content: "";
      position: absolute;
      pointer-events: none;
      left: 0;
      right: 0;
      bottom: 0;
      height: 60px;
      background: linear-gradient(120deg, rgba(247, 247, 249, 0) 40%, rgba(247, 247, 249, 0.8));
      border-radius: 0;
    }

    @media (max-width: 639px) {
      .headline-list.is-collapsed .headline-toggle {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
      }
    }

    @media (min-width: 920px) {
      .article-card {
        scroll-margin-top: 120px;
      }
    }

    .headline-list.is-collapsed li[data-collapsed="true"] {
      display: none;
    }

    .headline-list__item {
      margin: 0;
      border-top: 1px solid rgba(17, 24, 39, 0.08);
    }

    .headline-list__link {
      position: relative;
      display: block;
      padding: 8px 28px 8px 0;
      text-decoration: none;
      color: var(--text);
      font-weight: 300;
      font-size: 0.95rem;
      line-height: 1.45;
    }

    .headline-list__link:visited {
      color: var(--text);
    }

    .headline-list__link:hover,
    .headline-list__link:focus-visible {
      color: var(--accent);
      outline: none;
    }

    .headline-list__link[aria-current="true"] {
      color: var(--accent);
      font-weight: 300;
    }

    .headline-list__link::after {
      content: "›";
      position: absolute;
      right: 8px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--muted);
      font-size: 1.1rem;
      font-weight: 600;
      transition: color 0.18s ease;
    }

    .headline-list__link:hover::after,
    .headline-list__link:focus-visible::after,
    .headline-list__link[aria-current="true"]::after {
      color: var(--accent);
    }

    .headline-content {
      display: inline;
    }

    .headline-content .tag-pill {
      margin-left: 6px;
    }

    .headline-list__date {
      display: block;
      margin-top: 4px;
      font-size: 0.78rem;
      color: var(--muted);
      letter-spacing: 0.01em;
    }

    .headline-preview {
      position: relative;
    }

    .headline-preview a {
      pointer-events: none;
      user-select: none;
    }

    .headline-preview::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, rgba(247, 247, 249, 0), rgba(247, 247, 249, 0.9));
      pointer-events: none;
    }

    .articles {
      display: grid;
      gap: 0;
      width: min(1100px, 100%);
      margin: 0 auto;
    }

    .article-card {
      padding: 18px 16px 16px;
      display: grid;
      gap: 12px;
      border-bottom: 1px solid var(--border);
      box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.04);
      border-radius: 0;
    }

    .article-title__link {
      color: inherit;
      text-decoration: none;
      display: inline-block;
      border-bottom: 1px solid transparent;
      padding-bottom: 2px;
      transition: color 0.18s ease, border-bottom-color 0.18s ease;
    }

    .article-title__link:hover {
      color: var(--accent);
      border-bottom-color: rgba(37, 104, 235, 0.32);
    }

    .article-title__link:focus-visible {
      color: var(--accent);
      border-bottom-color: var(--accent);
      outline: none;
      box-shadow: 0 6px 0 -3px rgba(37, 104, 235, 0.25);
    }

    .article-title__link:visited {
      color: inherit;
    }

    .article-card.highlight {
      box-shadow: inset 0 0 20px rgba(37, 104, 235, 0.3);
    }

    .article-header {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      grid-template-areas:
        "title"
        "meta"
        "share";
      row-gap: 0;
      column-gap: 12px;
      align-items: start;
    }

    .article-header__top {
      grid-area: title;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .article-header__top h1 {
      margin: 0;
      flex: 1 1 auto;
      min-width: 0;
    }

    .article-header h3 {
      margin: 0;
      font-size: 1.1rem;
      font-weight: 650;
      display: inline-flex;
      flex-wrap: wrap;
      gap: 6px;
      align-items: center;
    }

    .article-header__top h3 {
      flex: 1 1 auto;
      min-width: 0;
    }

    .article-header .meta {
      grid-area: meta;
      font-size: 0.85rem;
      color: var(--muted);
      display: inline-flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 4px 0;
      justify-self: start;
    }

    .article-header .meta .meta-date {
      color: inherit;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .article-header .meta .meta-date:hover,
    .article-header .meta .meta-date:focus {
      color: var(--accent);
      text-decoration: underline;
    }

    .keyword-inline {
      color: inherit;
      text-decoration: underline;
      text-decoration-style: dotted;
      text-decoration-thickness: 1.5px;
      text-decoration-color: currentColor;
    }

    .keyword-inline:hover,
    .keyword-inline:focus {
      color: var(--accent);
    }
    .keyword-inline.keyword-inline--active {
      background: #fff6bf;
      border-radius: 4px;
      box-shadow: inset 0 -1px 0 rgba(255, 206, 86, 0.65);
    }
    .keyword-inline.keyword-inline--active:hover,
    .keyword-inline.keyword-inline--active:focus {
      background: #ffe58f;
      color: inherit;
    }

    .share-actions {
      grid-area: share;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      flex: 0 0 auto;
      justify-self: end;
      margin-top: 0;
    }

    .share-button {
      flex: 0 0 auto;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--muted);
      text-decoration: none;
      background: transparent;
      border: none;
      padding: 0;
      line-height: 0;
      cursor: pointer;
      box-sizing: border-box;
      align-self: center;
    }

    .share-button--copy {
      width: 34px;
      height: 34px;
      border-radius: 999px;
      transition: color 0.18s ease, background 0.18s ease, transform 0.18s ease;
      position: relative;
    }

    .share-button--copy:hover,
    .share-button--copy:focus-visible {
      background: var(--accent-soft);
      color: var(--accent);
      outline: none;
    }

    .share-button--copy:active {
      transform: scale(0.96);
    }

    .share-button__icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      color: inherit;
    }

    .share-button--copy .share-button__icon {
      width: 24px;
      height: 24px;
    }

    .share-button__icon svg,
    .share-button__icon img {
      width: 100%;
      height: 100%;
      display: block;
    }

    .share-button--copy.share-button--copied {
      color: var(--accent);
    }

    .share-button__icon--success {
      display: none;
    }

    .share-button--copy.share-button--copied .share-button__icon--default {
      display: none;
    }

    .share-button--copy.share-button--copied .share-button__icon--success {
      display: inline-flex;
    }

    .share-toast {
      position: fixed;
      left: 50%;
      bottom: 24px;
      padding: 10px 16px;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.92);
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 540;
      line-height: 1.2;
      transform: translate(-50%, 24px);
      opacity: 0;
      visibility: hidden;
      z-index: 400;
      pointer-events: none;
      box-shadow: 0 16px 40px rgba(15, 23, 42, 0.18);
      transition: opacity 0.22s ease, transform 0.22s ease;
    }

    .share-toast--visible {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
    }

    .share-sns-button {
      flex: 0 0 auto;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 34px;
      height: 34px;
      background: transparent;
      border: none;
      padding: 0;
      text-decoration: none;
      cursor: pointer;
      line-height: 0;
      transition: transform 0.18s ease, filter 0.18s ease;
      box-sizing: border-box;
      align-self: center;
      vertical-align: middle;
    }

    .share-sns-button:hover,
    .share-sns-button:focus-visible {
      filter: brightness(1.05);
      transform: translateY(-1px);
      outline: none;
    }

    .share-sns-button:active {
      transform: scale(0.95);
    }

    .share-sns-button__icon {
      display: inline-flex;
      width: 34px;
      height: 34px;
    }

    .share-sns-button__icon img {
      width: 100%;
      height: 100%;
      display: block;
    }

    @media (min-width: 768px) {
      .article-header {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
          "title share"
          "meta  meta";
        align-items: center;
      }

      .share-actions {
        justify-self: end;
        margin-top: 0;
      }

      .article-header .meta {
        margin-top: 0;
      }
    }

    .detail-text__copy {
      display: grid;
      gap: 12px;
      font-size: 0.95rem;
    }

    .detail-text__copy:empty {
      display: none;
    }

    .detail-text__copy p {
      margin: 0;
    }

    .detail-text {
      display: grid;
      gap: 0;
      font-size: 14px;
      font-weight: 350;
      line-height: 1.6;
      background: rgba(15, 23, 42, 0.02);
      border: 1px solid transparent;
      border-radius: 12px;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
      padding: 0;
      margin: 0;
      box-sizing: border-box;
      transition: max-height 0.32s ease, opacity 0.22s ease, padding 0.32s ease, margin-top 0.32s ease, border-color 0.32s ease;
    }

    details[open] .detail-text {
      max-height: 9999px;
      opacity: 1;
      overflow: hidden;
      padding: 12px;
      margin: 0;
      border-color: rgba(15, 23, 42, 0.05);
    }

    .detail-text__copy .highlight {
      color: #1d4ed8;
      font-weight: 550;
    }

    .detail-body {
      display: grid;
      gap: 14px;
      margin: 0;
    }

    .infographic {
      margin: 0;
      width: 100%;
    }

    .infographic .container {
      display: grid;
      gap: 10px;
      width: 100%;
      color: #243240;
      font-weight: 500;
      font-size: 0.95rem;
    }

    .infographic .content {
      display: grid;
      gap: 12px;
    }

.infographic .section {
  display: grid;
  gap: 6px;
}

.infographic .subtitle {
  display: inline-flex;
  align-items: center;
  gap: 0px;
      font-size: 0.92rem;
      font-weight: 540;
      line-height: 1.1;
      padding: 4px 8px;
      margin: 0;
      border-radius: 10px;
      background: linear-gradient(291deg, #9292ff 25%, #9e9eff 75%);
      color: #fff;
      letter-spacing: 0.02em;
      width: fit-content;
    }

    .infographic .point {
      font-size: 15px;
      line-height: 1.4;
      position: relative;
      padding-left: 18px;
      font-weight: 500;
    }

    .infographic .point::before {
      content: "|";
      position: absolute;
      left: 0;
      color: #667eea;
      font-size: 16px;
      font-weight: 400;
      transform: translateY(-2px);
    }

    .infographic .highlight {
      color: #d63a2c;
      font-weight: 600;
    }

    details summary {
      list-style: none;
    }

    details summary::-webkit-details-marker {
      display: none;
    }

    .details-toggle {
      position: relative;
      font-weight: 600;
      width: 100%;
      justify-content: center;
      box-sizing: border-box;
      max-height: 44px;
      margin: 0;
      overflow: hidden;
      isolation: isolate;
      transition: opacity 0.22s ease, max-height 0.3s ease, height 0.3s ease, padding 0.3s ease, margin 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
    }

    .details-toggle::after {
      content: "";
      position: absolute;
      inset: -150% -50%;
      background: linear-gradient(120deg, rgba(255, 255, 255, 0) 0%, rgb(32 141 174 / 20%) 20%, rgb(55 97 180 / 20%) 45%, rgb(78 60 198 / 20%) 70%, rgba(255, 255, 255, 0) 100%);
      transform: translateX(-120%);
      animation: detail-toggle-shine 2s ease-in-out infinite;
      pointer-events: none;
      mix-blend-mode: screen;
      opacity: 0.6;
    }

    @keyframes detail-toggle-shine {
      0% {
        transform: translateX(-130%);
      }
      100% {
        transform: translateX(130%);
      }
    }

    .details-toggle__label {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: inherit;
      text-decoration: none;
      font-size: 0.9rem;
      letter-spacing: 0.01em;
      transition: color 0.2s ease, text-shadow 0.3s ease;
    }

    .details-toggle:hover .details-toggle__label,
    .details-toggle:focus-visible .details-toggle__label {
      color: var(--accent);
      text-shadow: 0 0 12px rgba(29, 78, 216, 0.25);
    }

    .details-toggle__icon {
      font-size: 0.82rem;
      line-height: 1;
      transition: transform 0.18s ease;
    }

    details[open] .details-toggle__icon {
      transform: rotate(180deg);
    }

    .relevant {
      display: grid;
      gap: 0;
      background: var(--accent-soft);
      border-radius: 12px;
      padding: 10px 12px;
    }

    .relevant strong {
      font-size: 0.85rem;
      color: var(--accent);
    }

    .relevant__item {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      color: var(--text);
      text-decoration: none;
      padding: 4px 0;
      column-gap: 10px;
    }

    .relevant__item + .relevant__item {
      border-top: 1px solid rgba(29, 78, 216, 0.12);
    }

    .relevant__item--link:hover .relevant__title,
    .relevant__item--link:focus-visible .relevant__title {
      color: var(--accent);
    }

    .relevant__item--link:hover .relevant__chevron,
    .relevant__item--link:focus-visible .relevant__chevron {
      color: var(--accent);
    }

    .relevant__content {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .relevant__title {
      font-size: 14px;
      font-weight: 450;
      line-height: 1.3;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      color: inherit;
    }

    .relevant__meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
      color: var(--muted);
      font-size: 0.78rem;
    }

    .relevant__date {
      font-size: 12px;
    }

    .relevant__chevron {
      font-size: 1rem;
      color: var(--muted);
      font-weight: 600;
    }

    .tag-pill {
      position: relative;
      display: inline-flex;
      align-items: center;
      border-radius: 999px;
      background: #e8f0ff;
      color: var(--accent);
      padding: 4px 10px;
      font-size: 0.75rem;
      font-weight: 600;
      line-height: 1.4;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
      cursor: pointer;
      text-decoration: none;
      transition: all 0.15s ease;
    }

    .tag-pill::before {
      content: "#";
      margin-right: 2px;
      font-weight: 500;
      color: inherit;
    }

    .tag-pill:hover,
    .tag-pill:focus-visible {
      background: #f0f5ff;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
      transform: translateY(-1px);
      outline: none;
    }

    .tag-pill:active {
      background: #d7e4ff;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12);
      transform: scale(0.97);
    }

    .relevant .tag-pill {
      font-size: 0.72rem;
      padding: 4px 9px;
      line-height: 1.3;
    }

    .source-links {
      display: inline-flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
      font-size: 0.78rem;
      margin-top: 0;
    }

    .source-prefix {
      font-weight: 600;
      color: var(--muted);
    }

    .source-separator {
      color: var(--muted);
      font-weight: 600;
    }

    .source-link {
      display: inline-flex;
      align-items: center;
      color: var(--accent);
      text-decoration: none;
      font-weight: 500;
    }

    .source-link--primary {
      font-weight: 600;
    }

    .source-link:hover {
      text-decoration: underline;
    }

    .xpost-embeds {
      display: block;
      padding: 0;
      margin: 0;
    }

    .xpost-embeds__list {
      display: grid;
      gap: 12px;
      padding: 0;
      margin: 0;
    }

    .xpost-embed {
      max-width: 358px;
      margin: 0 auto;
      display: flex;
      justify-content: center;
    }

    .xpost-embed a {
      display: block;
      text-decoration: none;
    }

    .xpost-embed img {
      display: block;
      width: 100%;
      height: auto;
      border-radius: 12px;
    }

    .article-header .meta .tag-pill,
    .relevant a .tag-pill {
      margin-left: 4px;
    }

    .nav-fab {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: grid;
      gap: 8px;
      z-index: 20;
    }

    .nav-fab button {
      border: 1px solid rgba(148, 163, 184, 0.35);
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.42);
      color: rgba(248, 250, 252, 0.9);
      padding: 12px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0;
      width: 48px;
      height: 48px;
      transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease, color 0.18s ease;
      backdrop-filter: blur(10px);
      box-shadow: 0 8px 20px rgba(15, 23, 42, 0.12);
    }

    .nav-fab button svg {
      width: 20px;
      height: 20px;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
    }

    .nav-fab button[data-action="prev"] svg,
    .nav-fab button[data-action="next"] svg {
      stroke: rgba(255, 255, 255, 0.9);
      stroke-width: 2.2;
    }

    .nav-fab button[data-action="top"] svg {
      stroke: rgba(255, 255, 255, 0.92);
      stroke-width: 2.1;
    }

    .nav-fab button:hover,
    .nav-fab button:focus-visible {
      background: rgba(59, 130, 246, 0.45);
      border-color: rgba(191, 219, 254, 0.6);
      color: rgba(255, 255, 255, 0.98);
      transform: translateY(-1px);
    }

    .nav-fab button:active {
      background: rgba(37, 99, 235, 0.52);
      border-color: rgba(147, 197, 253, 0.75);
      transform: translateY(-0.5px);
    }

    @media (min-width: 640px) {
      .headline-list ul {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (min-width: 1024px) {
      .headline-list ul {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    @media (min-width: 920px) {
      .article-card {
        border-radius: 24px;
      }

      .article-card.has-relevant {
        grid-template-columns: minmax(0, 4fr) minmax(0, 3fr);
        grid-template-areas:
          "header header"
          "infographic relevant"
          "details details"
          "footer footer";
        column-gap: 24px;
        row-gap: 16px;
        align-content: start;
      }

      .article-card.has-relevant.has-xposts {
        grid-template-columns: minmax(0, 3fr) minmax(0, 3fr) minmax(0, 4fr);
        grid-template-areas:
          "header header header"
          "infographic xposts relevant"
          "details details details"
          "footer footer footer";
        column-gap: 24px;
        row-gap: 16px;
      }

      .article-card.has-relevant .article-header {
        grid-area: header;
      }

      .article-card.has-relevant .infographic {
        grid-area: infographic;
      }

      .article-card.has-relevant .xpost-embeds {
        grid-area: xposts;
      }

      .article-card.has-relevant details {
        grid-area: details;
        align-self: start;
      }

      .article-card.has-relevant .relevant {
        grid-area: relevant;
        align-self: start;
      }

      .article-card.has-relevant.has-xposts .relevant {
        grid-column: 3 / span 1;
      }

      .article-card.has-relevant .source-links {
        grid-area: footer;
      }
    }

    .nav-fab button:disabled {
      background: rgba(226, 232, 240, 0.4);
      border-color: rgba(203, 213, 225, 0.6);
      color: rgba(71, 85, 105, 0.4);
      cursor: default;
      transform: none;
    }

    .nav-fab button:disabled svg {
      stroke: rgba(71, 85, 105, 0.65);
    }

    @media (max-width: 919px) {
      .nav-fab {
        bottom: calc(80px + env(safe-area-inset-bottom, 0px));
        right: 16px;
      }
    }

    @media (max-width: 640px) {
      .article-card {
        padding: 16px;
      }
    }

/* Article detail layout */
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.share-main {
  min-height: 100vh;
  padding: 24px 0 120px;
  box-sizing: border-box;
}

.share-main__branding {
  width: min(760px, 100%);
  margin: 0 auto 24px;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  box-sizing: border-box;
}

.share-main__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  width: clamp(200px, 40vw, 250px);
}

.share-main__logo img {
  display: block;
  width: 100%;
  height: auto;
}

.share-shell {
  width: min(760px, 100%);
  margin: 0 auto;
}

@media (min-width: 920px) {
  .share-main__branding {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .share-main__logo {
    justify-content: flex-start;
  }
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "›";
  color: rgba(71, 85, 105, 0.6);
}

.breadcrumb__link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-bottom-color 0.18s ease;
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible {
  color: var(--accent);
  border-bottom-color: rgba(37, 104, 235, 0.3);
  outline: none;
}

.breadcrumb__link:focus-visible {
  box-shadow: 0 3px 0 -1px rgba(37, 104, 235, 0.35);
}

.breadcrumb__current {
  color: inherit;
  font-weight: 520;
}

.article-card.article-card--standalone {
  background: var(--panel);
  border-radius: 28px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  box-shadow: 0 26px 60px rgba(15, 23, 42, 0.18);
  padding: 32px 16px 36px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

    .article-card.article-card--standalone .article-header {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      grid-template-areas:
        "title"
        "meta"
        "share";
      row-gap: 0;
      column-gap: 12px;
      align-items: start;
    }

    .article-card.article-card--standalone .article-header__top {
      grid-area: title;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .article-card.article-card--standalone .article-title {
      margin: 0;
      font-size: 1.1rem;
      font-weight: 650;
      line-height: 1.34;
    }

    .article-card.article-card--standalone .meta {
      font-size: 0.92rem;
      color: var(--muted);
      display: inline-flex;
      flex-wrap: wrap;
      align-items: center;
      column-gap: 8px;
      grid-area: meta;
      justify-self: start;
    }

    .article-card.article-card--standalone .share-actions {
      grid-area: share;
      justify-self: end;
    }

    @media (min-width: 768px) {
      .article-card.article-card--standalone .article-header {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
          "title share"
          "meta  meta";
        row-gap: 0;
      }

      .article-card.article-card--standalone .share-actions {
        justify-self: end;
      }
    }

.article-card.article-card--standalone .meta .tag-pill {
  margin-left: 0;
}

.article-media {
  display: grid;
  width: 100%;
}

.article-media > .infographic,
.article-media > .xpost-embeds {
  width: 100%;
}

.article-media .xpost-embeds {
  margin: 0;
}

.article-details {
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.02);
  padding: 0;
  overflow: hidden;
}

.article-details[open] > summary {
  display: none;
}

.article-details .detail-text {
  padding: 20px;
  display: grid;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.article-details .detail-text p {
  margin: 0;
}

.article-details .detail-text .highlight {
  color: #1d4ed8;
  font-weight: 550;
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
}

.source-links .source-prefix {
  font-weight: 600;
}

.source-links .source-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 520;
}

.source-links .source-link:hover {
  text-decoration: underline;
}

.relevant {
  display: grid;
  gap: 0;
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 14px;
}

.relevant strong {
  font-size: 0.85rem;
  color: var(--accent);
}

.relevant__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  color: var(--text);
  text-decoration: none;
  padding: 4px 0;
  column-gap: 10px;
}

.relevant__item + .relevant__item {
  border-top: 1px solid rgba(29, 78, 216, 0.12);
}

.relevant__content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.relevant__title {
  font-size: 14px;
  font-weight: 450;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: inherit;
}

.relevant__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--muted);
}

.relevant__date {
  font-size: 12px;
}

.relevant__item--link:hover .relevant__title,
.relevant__item--link:focus-visible .relevant__title {
  color: var(--accent);
}

.relevant__item--link:hover .relevant__chevron,
.relevant__item--link:focus-visible .relevant__chevron {
  color: var(--accent);
}

.relevant__chevron {
  font-size: 1.2rem;
  color: var(--muted);
  font-weight: 600;
}

.nav-back {
  text-align: center;
}

.nav-back a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.nav-back a:hover {
  text-decoration: underline;
}

@media (min-width: 920px) {
  .article-card.article-card--standalone.has-xposts .article-media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    grid-template-areas: inherit;
    align-items: start;
  }

  .article-card.article-card--standalone.has-xposts .article-media .xpost-embeds {
    justify-self: start;
  }
}

    @media (max-width: 720px) {
      .article-card.article-card--standalone {
        padding: 28px 16px 32px;
        margin: 0px;
        border-radius: 24px;
      }
      .article-card.article-card--standalone .article-title {
        font-size: 1.1rem;
      }
    }

    @media (min-width: 1500px) {
      main:not(.share-main) {
        max-width: min(1600px, 100%);
        grid-template-columns: 360px minmax(0, 1fr);
        column-gap: 32px;
        align-items: start;
      }

      .date-nav-shell {
        width: min(1600px, 100%);
      }

      .headline-list {
        border-bottom: none;
        padding: 0 12px 24px;
        max-height: calc(100vh - 150px);
        overflow-y: auto;
        position: sticky;
        top: 110px;
        background: transparent;
        width: 360px;
      }

      .headline-list ul {
        column-gap: 0;
        grid-template-columns: repeat(1, minmax(0, 1fr));
      }

      .headline-list.is-collapsed .headline-toggle {
        position: sticky;
        bottom: 12px;
        right: initial;
        left: initial;
        margin-top: 16px;
        transform: none;
      }

      .headline-list__item--active {
        background: rgba(29, 78, 216, 0.12);
        border-radius: 12px;
        border-top-color: transparent;
        box-shadow: inset 0 0 0 1px rgba(29, 78, 216, 0.15);
      }

      .headline-list__item--active .headline-list__link {
        color: var(--accent);
        font-weight: 400;
      }

      .articles {
        width: min(1100px, 100%);
        margin: 0 auto;
      }
    }