/* =============================================
   Article Pages — Shared Layout
   ============================================= */

.article-hero {
  background: var(--color-white);
  padding: 140px max(40px, 10vw) 72px;
}

.article-hero-inner {
  max-width: var(--grid-width);
  margin: 0 auto;
}

.article-eyebrow {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.38em;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.article-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--color-text-main);
}

/* ----- Body ----- */

.article-body {
  background: var(--color-offwhite);
  padding: 80px max(40px, 10vw) 120px;
}

.article-inner {
  max-width: 640px;
  margin: 0 auto;
}

.article-text p {
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 2.3;
  color: var(--color-text-main);
  margin-bottom: 36px;
}

.article-text p:last-child {
  margin-bottom: 0;
}

.article-quote {
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.9;
  color: var(--color-navy);
  border-left: 2px solid var(--color-navy);
  padding-left: 24px;
  margin: 52px 0;
}

.article-list {
  list-style: none;
  padding: 0 0 0 20px;
  margin: 4px 0 40px;
  border-left: 1px solid rgba(26, 26, 46, 0.18);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.article-list li {
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 2.2;
  color: var(--color-text-main);
}

/* ----- Visual (image placeholder / photo) ----- */

.article-visual {
  width: 100%;
  height: 440px;
  background: linear-gradient(160deg, #0c1a30 0%, #1a2e4a 55%, #0d1f36 100%);
  overflow: hidden;
}

.article-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ----- Perspectives section ----- */

.article-perspectives {
  background: var(--color-cream);
  padding: 80px max(40px, 10vw);
}

.article-perspectives-inner {
  max-width: var(--grid-width);
  margin: 0 auto;
}

.article-section-label {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.38em;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.article-section-heading {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--color-text-main);
  margin-bottom: 52px;
}

/* ----- White body variant ----- */

.article-body.article-body-white {
  background: var(--color-white);
}

/* ----- Institute info (運営) ----- */

.institute-info-section {
  background: var(--color-offwhite);
}

.institute-info {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.institute-info-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0 32px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(26, 26, 46, 0.07);
  align-items: start;
}

.institute-info-row:first-child {
  border-top: 1px solid rgba(26, 26, 46, 0.07);
}

.institute-info dt {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  padding-top: 3px;
}

.institute-info dd {
  font-family: var(--font-serif);
  font-size: clamp(14px, 1.6vw, 17px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 2.1;
  color: var(--color-text-main);
}

/* ----- Responsive ----- */

@media (max-width: 768px) {
  .article-visual {
    height: 280px;
  }

  .article-hero {
    padding: 120px 28px 60px;
  }

  .article-body {
    padding: 60px 28px 100px;
  }

  .article-perspectives {
    padding: 60px 28px 80px;
  }

  .institute-info-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 20px 0;
  }

  .article-text p {
    font-size: clamp(14px, 3.8vw, 16px);
    letter-spacing: 0.01em;
    line-height: 2.0;
    margin-bottom: 28px;
  }

  .article-quote {
    font-size: clamp(15px, 4vw, 17px);
    letter-spacing: 0.02em;
    margin: 40px 0;
  }

  .article-list li {
    font-size: clamp(14px, 3.6vw, 16px);
    letter-spacing: 0.01em;
  }
}

/* ----- Cover (記事ヘッダーのカバー画像。見出しは画像側で確定する) ----- */

.article-hero-cover {
  padding-bottom: 24px;
}

.article-cover {
  background: var(--color-white);
  padding: 0 max(40px, 10vw) 4px;
}

.article-cover-inner {
  max-width: 860px;
  margin: 0 auto;
}

.article-cover img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  box-shadow: 0 14px 40px rgba(12, 26, 48, 0.16);
}

.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;
}

@media (max-width: 768px) {
  .article-cover {
    padding: 0 20px;
  }

  .article-cover img {
    border-radius: 10px;
  }
}