.briefing-index {
  padding: 42px 0 82px;
  background: var(--color-wash);
}

.briefing-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 14px;
  align-items: end;
  margin-bottom: 18px;
}

.briefing-search {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 0 16px;
  border: 1px solid var(--color-navy);
  background: #ffffff;
  color: var(--color-navy);
}

.briefing-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--color-ink);
}

.briefing-select {
  display: grid;
  gap: 6px;
}

.briefing-select span {
  color: var(--color-muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.briefing-select select {
  min-height: 54px;
  width: 100%;
  border: 1px solid var(--color-navy);
  border-radius: 0;
  background: #ffffff;
  color: var(--color-navy);
  font-weight: 800;
}

.briefing-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.briefing-filter {
  min-height: 36px;
  padding: 0 13px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: #ffffff;
  color: var(--color-navy);
  font-size: 0.8rem;
  font-weight: 800;
}

.briefing-filter:hover,
.briefing-filter:focus-visible,
.briefing-filter.active {
  border-color: var(--color-red);
  background: var(--color-red);
  color: #ffffff;
}

.briefing-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
  list-style: none;
}

.briefing-row {
  border-bottom: 1px solid var(--color-line);
  background: #ffffff;
}

.briefing-detail summary {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  min-height: 126px;
  padding: 24px;
  cursor: pointer;
  list-style: none;
}

.briefing-detail summary::-webkit-details-marker {
  display: none;
}

.briefing-number {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 2px solid var(--color-red);
  border-radius: 50%;
  color: var(--color-red);
  font-size: 1.2rem;
  font-weight: 800;
}

.briefing-summary-copy {
  display: grid;
  gap: 8px;
}

.briefing-meta {
  color: var(--color-muted);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.briefing-title {
  color: var(--color-navy);
  font-family: "Instrument Serif", Georgia, "Times New Roman", serif;
  font-size: 1.9rem;
  line-height: 1.08;
}

.briefing-detail summary:hover .briefing-title,
.briefing-detail summary:focus-visible .briefing-title {
  color: var(--color-red);
}

.briefing-open {
  justify-self: end;
  color: var(--color-red);
  font-size: 0.76rem;
  font-weight: 800;
  text-align: right;
  text-transform: uppercase;
}

.briefing-panel {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1fr);
  gap: 34px;
  padding: 0 24px 34px 24px;
}

.briefing-figure {
  margin: 0;
}

.briefing-figure img {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #ffffff;
}

.briefing-figure figcaption {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.direct-chart {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #ffffff;
}

.direct-chart-banner {
  padding: 18px 22px;
  background: var(--color-navy);
  color: #ffffff;
}

.direct-chart-banner h3 {
  margin: 0;
  color: #ffffff;
  font-family: "Libre Franklin", "Noto Sans JP", "Noto Sans KR", Arial, sans-serif;
  font-size: 1.18rem;
  font-weight: 800;
  line-height: 1.35;
}

.direct-chart-body {
  padding: 24px 24px 28px;
}

.chart-question {
  margin-bottom: 28px;
  color: var(--color-ink);
  font-size: 1.05rem;
  font-weight: 800;
}

.chart-subtitle {
  margin-bottom: 18px;
  color: var(--color-ink);
  font-size: 1rem;
}

.chart-note {
  margin-top: 24px;
  padding: 15px 18px;
  border: 1px solid #b8cbea;
  border-radius: var(--radius);
  background: #eef4fd;
  color: var(--color-navy);
  font-weight: 700;
  line-height: 1.55;
}

.chart-note-top {
  margin-top: 0;
  margin-bottom: 22px;
  border-color: #f0c27a;
  background: #fff4df;
}

.timeline-chart {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  align-items: start;
  padding: 8px 0 0;
}

.timeline-chart::before {
  position: absolute;
  top: 58px;
  right: 8%;
  left: 8%;
  height: 4px;
  background: var(--color-blue);
  content: "";
}

.timeline-point {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 12px;
  text-align: center;
}

.timeline-point strong {
  color: var(--tone-color);
  font-size: 1.4rem;
  line-height: 1;
}

.timeline-dot {
  position: relative;
  z-index: 1;
  width: 24px;
  height: 24px;
  border: 4px solid var(--tone-color);
  border-radius: 50%;
  background: var(--tone-color);
  box-shadow: 0 0 0 8px #ffffff;
}

.timeline-point p {
  color: var(--color-ink);
  font-size: 0.9rem;
  line-height: 1.45;
}

.bar-chart {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 28px;
  align-items: end;
  min-height: 310px;
  padding: 12px 8px 0;
  border-bottom: 3px solid #646464;
}

.bar-item {
  display: grid;
  grid-template-rows: auto 1fr auto;
  align-items: end;
  justify-items: center;
  min-height: 300px;
  text-align: center;
}

.bar-item strong {
  margin-bottom: 8px;
  color: var(--tone-color);
  font-size: 1.2rem;
  line-height: 1;
}

.bar-fill {
  display: block;
  width: min(72px, 72%);
  height: var(--bar-height);
  min-height: 24px;
  background: var(--tone-color);
}

.bar-item p {
  min-height: 42px;
  margin-top: 12px;
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.35;
}

.flow-chart {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 30px;
  align-items: center;
}

.flow-step {
  position: relative;
  min-height: 132px;
  padding: 18px 18px 20px;
  border: 2px solid var(--tone-color);
  border-radius: var(--radius);
  background: #ffffff;
}

.flow-step:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -24px;
  width: 18px;
  height: 18px;
  border-top: 4px solid var(--color-ink);
  border-right: 4px solid var(--color-ink);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.flow-step h4,
.insight-card h4 {
  margin: 0 0 10px;
  color: var(--tone-color);
  font-size: 1.04rem;
  line-height: 1.25;
}

.flow-step p,
.insight-card p {
  color: var(--color-ink);
  font-size: 0.92rem;
  line-height: 1.55;
}

.insight-chart {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.insight-card {
  min-height: 198px;
  padding: 20px;
  border: 2px solid var(--tone-color);
  border-radius: var(--radius);
  background: #ffffff;
}

.insight-card span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--tone-color);
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 800;
}

.tone-blue {
  --tone-color: var(--color-blue);
}

.tone-red {
  --tone-color: var(--color-red);
}

.tone-orange {
  --tone-color: #e87b00;
}

.tone-green {
  --tone-color: #2f815c;
}

.briefing-text {
  display: grid;
  gap: 26px;
}

.briefing-text h3 {
  margin-bottom: 12px;
  color: var(--color-red);
  font-family: "Libre Franklin", "Noto Sans JP", "Noto Sans KR", Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.briefing-text ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
}

.briefing-text li,
.briefing-text p {
  color: var(--color-ink);
  font-size: 0.96rem;
  line-height: 1.75;
}

.briefing-qa {
  padding: 14px 0;
  border-top: 1px solid var(--color-line);
}

.briefing-qa h4 {
  margin: 0 0 6px;
  color: var(--color-navy);
  font-size: 0.98rem;
}

.briefing-source {
  margin-top: 10px;
  color: var(--color-muted) !important;
  font-size: 0.86rem !important;
}

.briefing-empty {
  padding: 36px 0;
  color: var(--color-muted);
  font-weight: 700;
}

.briefing-references {
  background: #ffffff;
}

.briefing-references .site-container {
  padding: 54px 0;
}

.briefing-references h2 {
  margin-bottom: 14px;
  font-family: "Libre Franklin", "Noto Sans JP", "Noto Sans KR", Arial, sans-serif;
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.briefing-references ol {
  columns: 2;
  column-gap: 46px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.briefing-references li {
  break-inside: avoid;
  margin-bottom: 8px;
}

body[data-language="ja"] .briefing-title,
body[data-language="ko"] .briefing-title {
  font-family: "Noto Serif KR", "Noto Serif JP", "Instrument Serif", Georgia, serif;
}

@media (max-width: 980px) {
  .briefing-panel {
    grid-template-columns: 1fr;
  }

  .flow-chart,
  .insight-chart {
    grid-template-columns: 1fr;
  }

  .flow-step:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 760px) {
  .briefing-tools {
    grid-template-columns: 1fr;
  }

  .briefing-detail summary {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
    padding: 20px 14px;
  }

  .briefing-number {
    width: 44px;
    height: 44px;
    font-size: 0.96rem;
  }

  .briefing-title {
    font-size: 1.38rem;
  }

  .briefing-open {
    grid-column: 2;
    justify-self: start;
    text-align: left;
  }

  .briefing-panel {
    padding: 0 14px 28px;
  }

  .direct-chart-body {
    padding: 20px 16px 22px;
  }

  .timeline-chart {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .timeline-chart::before {
    top: 34px;
    bottom: 34px;
    left: 50%;
    width: 4px;
    height: auto;
    transform: translateX(-50%);
  }

  .bar-chart {
    gap: 18px;
    min-height: 250px;
    overflow-x: auto;
  }

  .bar-item {
    min-width: 96px;
    min-height: 244px;
  }

  .briefing-references ol {
    columns: 1;
  }
}