/* ============================================
   SEISEI INSIGHTS — article & index pages
   Extends the charcoal/ivory/oxblood system
   ============================================ */

.ins-body {
  background: var(--paper);
}

.ins-body .header {
  position: sticky;
  top: 0;
}

.ins-langs {
  display: flex;
  gap: 8px;
}

.ins-lang {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink);
  border: 1px solid var(--border);
  padding: 6px 13px;
  transition: all 0.3s ease;
}

.ins-lang:hover {
  border-color: var(--oxblood-light);
  color: var(--oxblood);
}

.ins-article {
  padding: 96px 0 130px;
}

.ins-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
}

.ins-eyebrow {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.ins-eyebrow::before {
  content: '';
  display: block;
  width: 44px;
  height: 1px;
  background: var(--oxblood-hair);
}

.ins-article h1 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin-bottom: 18px;
}

.ins-date {
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--text-light);
  margin-bottom: 56px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.ins-sub {
  font-size: 14.5px;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 64px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.ins-content p {
  font-size: 15.5px;
  line-height: 2.25;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 28px;
}

.ins-content h2 {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.8;
  color: var(--ink);
  margin: 56px 0 24px;
  padding-left: 18px;
  border-left: 2px solid var(--oxblood);
}

.ins-content ul {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.ins-content li {
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.04em;
  color: var(--text);
  padding: 6px 0 6px 24px;
  position: relative;
}

.ins-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 21px;
  width: 10px;
  height: 1px;
  background: var(--oxblood);
}

.ins-content strong {
  font-weight: 600;
  color: var(--ink);
}

.ins-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 52px 0 28px;
}

.ins-content hr + p,
.ins-content hr ~ p em {
  font-size: 12.5px;
  color: var(--text-light);
  line-height: 2;
}

.ins-table-wrap {
  overflow-x: auto;
  margin: 0 0 28px;
  border: 1px solid var(--border);
}

.ins-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.ins-content th {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: rgba(110, 31, 44, 0.05);
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.ins-content td {
  padding: 14px 18px;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.ins-content tr:last-child td {
  border-bottom: none;
}

.ins-back {
  display: inline-block;
  margin-top: 48px;
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--oxblood);
  border-bottom: 1px solid var(--oxblood-hair);
  padding-bottom: 3px;
  transition: all 0.3s ease;
}

.ins-back:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* --- index cards --- */
.ins-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.ins-card {
  display: block;
  padding: 40px 8px;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.ins-card:hover {
  background: rgba(110, 31, 44, 0.04);
}

.ins-card-series {
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 14px;
}

.ins-card h2 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.8;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin-bottom: 12px;
}

.ins-card-excerpt {
  font-size: 13.5px;
  line-height: 2;
  letter-spacing: 0.03em;
  color: var(--text-light);
  margin-bottom: 16px;
}

.ins-card-more {
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--oxblood);
}

@media (max-width: 768px) {
  .ins-article {
    padding: 64px 0 90px;
  }

  .ins-container {
    padding: 0 22px;
  }

  .ins-langs {
    display: none;
  }
}