.blog-index {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 2.2rem 2rem 4rem;
}

.blog-index-header {
  max-width: var(--content-max);
  margin-bottom: 2rem;
}

.blog-index-eyebrow,
.blog-post-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

.blog-index-title,
.blog-post-title {
  font-family: "IBM Plex Sans JP", sans-serif;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
  text-wrap: balance;
}

.blog-index-title {
  font-size: 2rem;
}

.blog-filters {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1rem 0;
  margin-bottom: 1.4rem;
}

.blog-filters fieldset {
  border: 0;
}

.blog-filters fieldset + fieldset {
  margin-top: 0.95rem;
}

.blog-filters legend {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 0.7rem;
}

.blog-search-fieldset {
  max-width: var(--content-max);
}

.blog-search {
  display: block;
  width: min(100%, 36rem);
}

.blog-search-input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--ink);
  font: inherit;
  line-height: 1.4;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.blog-search-input::placeholder {
  color: var(--muted);
}

.blog-search-input:hover {
  border-color: rgba(240, 81, 56, 0.32);
}

.blog-search-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-color: rgba(240, 81, 56, 0.45);
  background: rgba(255, 255, 255, 0.62);
}

.blog-search-hint {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.blog-filter-controls-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 0.9rem;
  margin-top: 0.95rem;
}

.blog-filter-controls-disclosure {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2rem;
  max-width: 100%;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.24);
  color: var(--ink-soft);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.blog-filter-controls-disclosure::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translate(-0.05rem, -0.05rem);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.blog-filter-controls-disclosure:hover,
.blog-filter-controls-disclosure:focus-visible {
  border-color: rgba(240, 81, 56, 0.45);
  background: var(--accent-soft);
  color: var(--ink);
}

.blog-filter-controls-disclosure:hover::before,
.blog-filter-controls-disclosure:focus-visible::before {
  border-color: var(--accent);
}

.blog-filter-controls-disclosure[aria-expanded="false"]::before {
  transform: rotate(-45deg);
}

.blog-filter-controls-disclosure:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.blog-filter-controls-title {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.blog-filter-controls-summary {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.blog-filter-controls {
  display: grid;
  grid-template-rows: 1fr;
  margin-top: 0.95rem;
  opacity: 1;
  transition: grid-template-rows 0.2s ease, margin-top 0.2s ease, opacity 0.15s ease;
}

.blog-filter-controls.is-collapsed {
  grid-template-rows: 0fr;
  margin-top: 0;
  opacity: 0;
}

.blog-filter-controls-inner {
  min-height: 0;
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .blog-filter-controls {
    transition: none;
  }
}

.blog-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
}

.blog-filter-item {
  min-width: 0;
}

.blog-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  max-width: 100%;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.24);
  cursor: pointer;
  font-size: 0.82rem;
  line-height: 1.4;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.blog-filter:hover,
.blog-filter:has(input:focus-visible) {
  border-color: rgba(240, 81, 56, 0.45);
  color: var(--ink);
}

.blog-filter:has(input:checked) {
  border-color: rgba(240, 81, 56, 0.45);
  background: var(--accent-soft);
  color: var(--ink);
}

.blog-filter input {
  accent-color: var(--accent);
}

.blog-filter-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.7rem;
}

.blog-filter-action {
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  background: rgba(255, 255, 255, 0.24);
  color: var(--ink-soft);
  font-family: "IBM Plex Sans JP", sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: normal;
  text-transform: none;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.blog-filter-action:hover,
.blog-filter-action:focus-visible {
  border-color: rgba(240, 81, 56, 0.45);
  background: var(--accent-soft);
  color: var(--ink);
}

.blog-filter-action:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.filter-status {
  font-weight: 500;
  overflow-wrap: anywhere;
}

.filter-count {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  color: var(--muted);
}

.blog-date-range {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.blog-date-field {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.4;
}

.blog-date-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.blog-date-input {
  min-height: 2.2rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--ink);
  font: inherit;
  font-size: 0.82rem;
  line-height: 1.4;
}

.blog-date-input:hover {
  border-color: rgba(240, 81, 56, 0.32);
}

.blog-date-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-color: rgba(240, 81, 56, 0.45);
  background: rgba(255, 255, 255, 0.62);
}

.blog-configs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.4rem;
  align-items: center;
}

.blog-configs legend {
  width: 100%;
}

.blog-toggle-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.4;
}

.blog-toggle-filter-label {
  font-weight: 500;
}

.blog-toggle-filter-symbol {
  color: var(--muted);
}

.blog-toggle-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.blog-toggle-switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.blog-toggle-switch-track {
  display: inline-flex;
  align-items: center;
  width: 2.6rem;
  padding: 0.15rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.3);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.blog-toggle-switch-thumb {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 2px rgba(28, 29, 33, 0.16);
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.blog-toggle-switch:hover .blog-toggle-switch-track,
.blog-toggle-switch:has(input:focus-visible) .blog-toggle-switch-track {
  border-color: rgba(240, 81, 56, 0.45);
}

.blog-toggle-switch input:checked + .blog-toggle-switch-track {
  background: var(--accent-soft);
  border-color: rgba(240, 81, 56, 0.45);
}

.blog-toggle-switch input:checked + .blog-toggle-switch-track .blog-toggle-switch-thumb {
  transform: translateX(1.15rem);
  background: var(--accent);
}

.blog-toggle-switch input:focus-visible + .blog-toggle-switch-track {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.blog-list-summary {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-left: 0;
}

.blog-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.85rem;
}

.blog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-height: 100%;
  padding: 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.24);
  color: inherit;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.blog-card:hover,
.blog-card:focus-within {
  background: var(--accent-soft);
  border-color: rgba(240, 81, 56, 0.35);
}

.blog-card:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.blog-card[hidden] {
  display: none;
}

.blog-card-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 0.8rem;
}

.blog-card-header-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.blog-card-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.blog-card-id {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.blog-card-type,
.blog-card-date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  line-height: 1.4;
}

.blog-card-date {
  flex-shrink: 0;
  text-align: right;
}

.blog-read-button,
.blog-favorite-button {
  position: relative;
  z-index: 2;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.52);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
}

.blog-read-button:hover,
.blog-read-button:focus-visible,
.blog-favorite-button:hover,
.blog-favorite-button:focus-visible {
  border-color: rgba(240, 81, 56, 0.45);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.76);
}

.blog-read-button:focus-visible,
.blog-favorite-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.blog-read-button[aria-pressed="true"],
.blog-favorite-button[aria-pressed="true"] {
  border-color: rgba(240, 81, 56, 0.45);
  color: var(--accent);
  background: var(--accent-soft);
}

.blog-read-icon,
.blog-favorite-icon {
  width: 1rem;
  height: 1rem;
  fill: transparent;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linejoin: round;
}

.blog-read-icon {
  stroke-linecap: round;
}

.blog-favorite-button[aria-pressed="true"] .blog-favorite-icon {
  fill: currentColor;
}

.blog-card-title {
  font-family: "IBM Plex Sans JP", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  text-wrap: balance;
}

.blog-card-title-link {
  color: inherit;
  text-decoration: none;
}

.blog-card-title-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.blog-card-title-original,
.blog-card-meta {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.blog-card-meta {
  margin-top: auto;
}

.blog-empty {
  border: 1px dashed var(--rule);
  border-radius: 6px;
  padding: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.blog-empty[hidden] {
  display: none;
}

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

.blog-post {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2.2rem 2rem 4rem;
}

.blog-post-header {
  margin-bottom: 0;
}

.blog-post-title {
  font-size: clamp(1.55rem, 3.4vw, 2.1rem);
  letter-spacing: -0.02em;
  margin-bottom: 1.3rem;
}

.blog-post-title-original {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: clamp(0.94rem, 1.8vw, 1.06rem);
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--muted);
  margin: 0;
  max-width: 46rem;
}

.blog-post-title-original-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.9rem;
  margin-top: -0.7rem;
  margin-bottom: 1.35rem;
}

.blog-post-title-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.blog-post-title code,
.blog-post-title-original code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86em;
  font-weight: 600;
  background: var(--paper-deep);
  color: var(--ink);
  padding: 0.06em 0.32em;
  border-radius: 4px;
  vertical-align: 0.04em;
}

.blog-post-meta {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.blog-post-meta .meta-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 1.2rem;
  align-items: baseline;
}

.blog-post-meta .meta-row dt {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 500;
}

.blog-post-meta .meta-row dd {
  font-size: 0.86rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.blog-post-summary-note {
  margin: 1rem 0 0;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--muted);
}

.blog-post-summary-note a.external,
.blog-post-meta a.external {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.blog-post-summary-note a.external:hover,
.blog-post-meta a.external:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.blog-post-summary-note .arrow,
.blog-post-meta .arrow {
  display: inline-block;
  margin-left: 0.25em;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85em;
  color: var(--muted);
  transition: transform 0.15s ease, color 0.15s ease;
}

.blog-post-summary-note a.external:hover .arrow,
.blog-post-meta a.external:hover .arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.blog-post-body {
  margin-top: 2.2rem;
}

.blog-post-body h2 {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  margin: 2.2rem 0 1.1rem;
  flex-wrap: wrap;
  font-family: "IBM Plex Sans JP", sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  line-height: 1.45;
  letter-spacing: -0.012em;
  color: var(--ink);
}

.blog-post-body > h2:first-child {
  margin-top: 0;
}

@media (max-width: 720px) {
  .blog-index,
  .blog-post {
    padding: 1.6rem 1.2rem 3rem;
  }

  .blog-filters {
    transition: border-top-color 0.15s ease;
  }

  body.is-blog-search-compact .blog-filters {
    border-top-color: transparent;
  }

  .blog-index-header,
  .blog-search-fieldset legend,
  .blog-search-hint {
    overflow: hidden;
    transition: max-height 0.2s ease, margin 0.2s ease, opacity 0.15s ease;
  }

  .blog-index-header {
    max-height: 8rem;
  }

  .blog-search-hint {
    max-height: 4rem;
  }

  .blog-search-fieldset legend {
    max-height: 3rem;
  }

  .blog-index.is-search-compact .blog-index-header,
  .blog-index.is-search-compact .blog-search-fieldset legend,
  .blog-index.is-search-compact .blog-search-hint {
    max-height: 0;
    margin-top: 0;
    margin-bottom: 0;
    opacity: 0;
    pointer-events: none;
  }

  .blog-index-title {
    font-size: 1.7rem;
  }

  .blog-post-title {
    font-size: clamp(1.35rem, 6vw, 1.7rem);
    margin-bottom: 1rem;
  }

  .blog-post-title-original {
    font-size: 0.92rem;
  }

  .blog-post-title-original-row {
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
  }

  .blog-card-header {
    flex-wrap: wrap;
  }

  .blog-card-date {
    text-align: left;
  }

  .blog-post-meta .meta-row {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }

  .blog-post-meta .meta-row + .meta-row {
    margin-top: 0.35rem;
  }
}

@media (max-width: 720px) and (prefers-reduced-motion: reduce) {
  .blog-filters,
  .blog-index-header,
  .blog-search-fieldset legend,
  .blog-search-hint {
    transition: none;
  }
}