/* ============================================================
   AI観測ラボ ブログ — blog-home.css
   天体観測テーマ完全版
   2026.02
   ============================================================ */

/* ===== CSS Variables ===== */
:root {
  --bg:             #F4F6FB;
  --bg2:            #ECEEF7;
  --bg3:            #E4E8F4;
  --ink:            #1E2235;
  --ink-mid:        #4A5068;
  --ink-soft:       #8B92AA;
  --star-blue:      #6B8FBF;
  --star-blue-pale: #D4E2F2;
  --gold:           #B8954A;
  --gold-pale:      #F0E4C0;
  --line:           rgba(107,143,191,0.15);
  --line-strong:    rgba(107,143,191,0.28);
  --white:          #ffffff;
  --font-serif:     'Cormorant Garamond', 'Hiragino Mincho ProN', serif;
  --font-sans:      'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --font-mono:      'DM Mono', 'IBM Plex Mono', monospace;
  --radius:         0px;
  --transition:     .22s ease;
}

/* ===== Reset & Base ===== */
.blog-home-wrap *,
.blog-home-wrap *::before,
.blog-home-wrap *::after {
  box-sizing: border-box;
}

/* ページ背景 */
body.page-template-template-blog-home {
  background: var(--bg) !important;
  color: var(--ink) !important;
}

body.page-template-template-blog-home::before {
  background-image: none !important;
}

/* ===== ヘッダー上書き ===== */
body.page-template-template-blog-home .site-header {
  background: rgba(244,246,251,0.88) !important;
  border-bottom: 1px solid var(--line-strong) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  box-shadow: none !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 100 !important;
}

/* ロゴ */
/* ロゴ 2トーンスタイル
   元テキスト「AI観測ラボ ブログ」の「AI」をcolor:transparentで隠し
   ::beforeでAIをモノ青、残りをセリフ体で表示 */
body.page-template-template-blog-home .main-title a {
  font-family: var(--font-serif) !important;
  font-size: 17px !important;
  font-weight: 300 !important;
  letter-spacing: .04em !important;
  color: var(--ink) !important;
  background: none !important;
  -webkit-text-fill-color: var(--ink) !important;
  -webkit-background-clip: initial !important;
  background-clip: initial !important;
  text-shadow: none !important;
  position: relative !important;
}

body.page-template-template-blog-home .main-title a::after {
  content: none !important;
}

/* AIだけモノスペース・青で前置き */
body.page-template-template-blog-home .main-title a::before {
  content: 'AI' !important;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
  font-weight: 400 !important;
  letter-spacing: .14em !important;
  color: var(--star-blue) !important;
  -webkit-text-fill-color: var(--star-blue) !important;
  margin-right: 3px !important;
  vertical-align: middle !important;
}

/* ナビ */
body.page-template-template-blog-home .main-navigation a {
  font-family: var(--font-mono) !important;
  font-size: 11px !important;
  letter-spacing: .12em !important;
  text-transform: uppercase !important;
  color: var(--ink-soft) !important;
  font-weight: 400 !important;
  text-shadow: none !important;
}

body.page-template-template-blog-home .main-navigation a:hover {
  color: var(--star-blue) !important;
  text-shadow: none !important;
}

@media (max-width: 680px) {
  .main-navigation {
    display: flex !important;
    justify-content: flex-end !important;
    align-items: center !important;
  }
}

/* ===== ラッパー ===== */
.blog-home-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px 64px;
}

/* ===== 共通: セクション見出し ===== */
.obs-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 36px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
  position: relative;
}
.obs-section-head::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 44px; height: 2px;
  background: var(--star-blue);
}
.obs-section-en {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 30px;
  color: var(--ink);
  letter-spacing: .02em;
}
.obs-section-ja {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.obs-section-log {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .15em;
  color: var(--star-blue);
  opacity: .55;
}

/* ===== HERO ===== */
.obs-hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  margin: 0 -40px 56px;
  padding: 0 40px;
}

/* 星図 SVG 背景 */
.obs-hero-starmap {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* グラデーション光 */
.obs-hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}
.obs-hero-orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #C9D9F0 0%, transparent 70%);
  top: -100px; right: -60px;
  opacity: .45;
}
.obs-hero-orb-2 {
  width: 340px; height: 340px;
  background: radial-gradient(circle, #E8D8A8 0%, transparent 70%);
  bottom: 40px; left: -40px;
  opacity: .28;
}

/* テキストコンテンツ */
.obs-hero-inner {
  position: relative;
  z-index: 10;
  max-width: 640px;
  padding: 72px 0 80px;
}

.obs-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--star-blue);
  margin-bottom: 24px;
  animation: obsIn .6s .1s both;
}
.obs-hero-eyebrow::before {
  content: '';
  display: block;
  width: 26px; height: 1px;
  background: var(--star-blue);
}

.obs-hero-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--ink);
  margin-bottom: 10px;
  animation: obsIn .7s .25s both;
  white-space: nowrap;
}
.obs-hero-title em {
  font-style: italic;
  color: var(--star-blue);
}

.obs-hero-subtitle {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(16px, 2.2vw, 22px);
  color: var(--ink-mid);
  letter-spacing: .03em;
  margin-bottom: 18px;
  animation: obsIn .7s .35s both;
}

.obs-hero-desc {
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 460px;
  margin-bottom: 40px;
  animation: obsIn .7s .45s both;
}

.obs-hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  animation: obsIn .7s .58s both;
}

.obs-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--ink);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.obs-btn-primary:hover {
  background: var(--star-blue);
  border-color: var(--star-blue);
  transform: translateY(-2px);
  color: #fff;
}

.obs-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid var(--line-strong);
  color: var(--star-blue);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition);
}
.obs-btn-ghost:hover {
  border-color: var(--star-blue);
  background: rgba(107,143,191,.06);
  color: var(--star-blue);
}

/* スコープビジュアル（右） */
.obs-hero-scope {
  position: absolute;
  right: clamp(20px, 8vw, 100px);
  top: 50%;
  transform: translateY(-50%);
  width: clamp(180px, 26vw, 320px);
  height: clamp(180px, 26vw, 320px);
  pointer-events: none;
  opacity: 0;
  animation: obsFade 1s .7s forwards;
}

/* Hero ボトムメタ */
.obs-hero-meta {
  position: absolute;
  bottom: 20px; left: 40px; right: 40px;
  display: flex;
  align-items: center;
  gap: 32px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .16em;
  color: var(--ink-soft);
  opacity: 0;
  animation: obsFade 1s .9s forwards;
  pointer-events: none;
}
.obs-hero-meta-stat { display: flex; flex-direction: column; gap: 2px; }
.obs-hero-meta-stat strong {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 300;
  color: var(--ink-mid);
  letter-spacing: 0;
}
.obs-hero-meta-divider {
  width: 1px; height: 36px;
  background: var(--line-strong);
}
.obs-hero-meta-coord {
  margin-left: auto;
  font-size: 9px;
  color: var(--ink-soft);
  opacity: .6;
}

/* ===== FEATURED ===== */
.obs-featured { margin-bottom: 64px; }

.obs-featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.obs-card {
  display: block;
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.obs-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 36px rgba(107,143,191,.13);
  border-color: var(--star-blue);
}

.obs-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg2);
  position: relative;
}
.obs-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.obs-card:hover .obs-card-img img { transform: scale(1.04); }

.obs-badge {
  position: absolute;
  top: 10px; left: 10px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: .15em;
  color: var(--star-blue);
  background: rgba(244,246,251,.9);
  border: 1px solid var(--line-strong);
  padding: 3px 8px;
  backdrop-filter: blur(4px);
}

.obs-card-body { padding: 18px 20px 22px; }

.obs-card-meta {
  display: flex;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--ink-soft);
  margin-bottom: 9px;
}

.obs-card-title {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.obs-card:hover .obs-card-title { color: var(--star-blue); }

.obs-card-excerpt {
  font-size: 11px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.obs-view-all {
  margin-top: 24px;
  text-align: right;
}
.obs-view-all a {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--star-blue);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap var(--transition);
}
.obs-view-all a:hover { gap: 14px; }
.obs-view-all a::after { content: '→'; }

/* ===== POPULAR ===== */
.obs-popular { margin-bottom: 64px; }

.obs-popular-list {
  display: flex;
  flex-direction: column;
}

.obs-popular-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: stretch;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
  height: 120px;
}
.obs-popular-card:first-child { border-top: 1px solid var(--line); }
.obs-popular-card:hover { background: rgba(107,143,191,.04); }

.obs-popular-card::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 2px; height: 0;
  background: var(--star-blue);
  transition: height .22s ease;
}
.obs-popular-card:hover::before { height: 100%; }

.obs-rank-col {
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--line);
}
.obs-rank-num {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 300;
  color: var(--star-blue);
  line-height: 1;
  opacity: .45;
}
.obs-rank-label {
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: .2em;
  color: var(--ink-soft);
  margin-top: 2px;
  text-transform: uppercase;
}
.obs-popular-card:first-child .obs-rank-num {
  color: var(--gold);
  opacity: .85;
}

.obs-popular-img {
  display: none;
}
.obs-popular-img img {
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  transition: transform .35s;
}
.obs-popular-card:hover .obs-popular-img img { transform: scale(1.06); }

.obs-popular-body { padding: 18px 24px; }
.obs-popular-meta {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--ink-soft);
  margin-bottom: 7px;
}
.obs-popular-title {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink);
  transition: color var(--transition);
}
.obs-popular-card:hover .obs-popular-title { color: var(--star-blue); }
.obs-popular-excerpt {
  font-size: 11px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-top: 5px;
}

/* ===== LAB INTRO ===== */
.obs-lab { margin-bottom: 64px; }

.obs-lab-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--line-strong);
  background: var(--white);
  overflow: hidden;
}

.obs-lab-text {
  padding: 52px 48px;
  border-right: 1px solid var(--line-strong);
}

.obs-lab-eyebrow {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--star-blue);
  margin-bottom: 20px;
}

.obs-lab-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 36px;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 20px;
}

.obs-lab-desc {
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-mid);
  margin-bottom: 32px;
}

.obs-lab-link {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--star-blue);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap var(--transition);
}
.obs-lab-link:hover { gap: 14px; }
.obs-lab-link::after { content: '→'; }

.obs-lab-stats {
  padding: 52px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
  background: var(--bg2);
}

.obs-lab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line-strong);
}
.obs-lab-stat:last-child { border-bottom: none; padding-bottom: 0; }

.obs-lab-stat-num {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 300;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -.01em;
}
.obs-lab-stat-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .18em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.obs-lab-stat-desc {
  font-size: 11px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-top: 2px;
}

/* ===== CTA ===== */
.obs-cta { margin-bottom: 64px; }

.obs-cta-inner {
  background: var(--ink);
  padding: 64px 56px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* CTA 背景スコープ */
.obs-cta-bg-scope {
  position: absolute;
  right: -60px; top: 50%;
  transform: translateY(-50%);
  width: 300px; height: 300px;
  pointer-events: none;
  opacity: .06;
}

.obs-cta-eyebrow {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--star-blue);
  margin-bottom: 16px;
}

.obs-cta-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(26px, 3.5vw, 40px);
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}
.obs-cta-title em {
  font-style: italic;
  color: var(--star-blue);
  -webkit-text-fill-color: var(--star-blue);
}

.obs-cta-desc {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,.55);
  max-width: 440px;
}

.obs-cta-action { flex-shrink: 0; }

.obs-btn-cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 36px;
  background: var(--star-blue);
  color: #fff;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  border: 1px solid var(--star-blue);
  transition: background var(--transition), transform var(--transition);
}
.obs-btn-cta:hover {
  background: #5a7eae;
  transform: translateY(-2px);
  color: #fff;
}
.obs-btn-cta-sub {
  font-size: 9px;
  letter-spacing: .1em;
  opacity: .7;
  text-transform: none;
  font-family: var(--font-mono);
}

/* ===== KNOWLEDGE ===== */
.obs-knowledge { margin-bottom: 0; }

.obs-knowledge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 16px;
}

/* NODE08: ワイドカード（2列分） */
.obs-know-card.wide {
  grid-column: span 2;
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg2);
}

.obs-know-card {
  background: var(--white);
  border: 1px solid var(--line-strong);
  padding: 22px 18px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.obs-know-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}
.obs-know-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(107,143,191,.12);
  border-color: var(--star-blue);
}
.obs-know-card:hover::before { background: var(--star-blue); }

.obs-know-card.highlight {
  background: linear-gradient(135deg, #5B82B8 0%, #7BA3CC 100%);
  border-color: #5B82B8;
}
.obs-know-card.highlight::before { background: var(--gold) !important; }
.obs-know-card.highlight:hover {
  border-color: #4a70a5;
  box-shadow: 0 10px 28px rgba(107,143,191,.25);
}

.obs-know-card.wide {
  grid-column: span 2;
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg2);
}

.obs-know-dot {
  position: absolute;
  top: 12px; right: 12px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--star-blue);
  opacity: .25;
  transition: opacity var(--transition);
}
.obs-know-card:hover .obs-know-dot { opacity: .65; }
.obs-know-card.highlight .obs-know-dot { background: var(--gold); opacity: .5; }

.obs-know-num {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: .2em;
  color: var(--ink-soft);
  margin-bottom: 14px;
  opacity: .5;
}
.obs-know-card.highlight .obs-know-num { color: rgba(255,255,255,.35); }

.obs-know-icon {
  width: 34px; height: 34px;
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  font-size: 15px;
}
.obs-know-card.highlight .obs-know-icon { border-color: rgba(255,255,255,.12); }

.obs-know-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.4;
}
.obs-know-card.highlight .obs-know-title { color: #fff; }

.obs-know-desc {
  font-size: 10px;
  color: var(--ink-soft);
  line-height: 1.65;
}
.obs-know-card.highlight .obs-know-desc { color: rgba(255,255,255,.45); }

/* リンクカード（aタグ）のhover対応 */
a.obs-know-card {
  display: block;
  color: var(--ink);
}
a.obs-know-card:hover {
  color: var(--ink);
}
a.obs-know-card.highlight:hover {
  color: #fff;
}
.obs-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30,34,53,.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.obs-modal.active { display: flex; }

.obs-modal-content {
  background: var(--white);
  max-width: 580px;
  width: 100%;
  max-height: 82vh;
  overflow-y: auto;
  padding: 48px;
  position: relative;
  border-top: 3px solid var(--star-blue);
  animation: obsIn .2s ease;
}

.obs-modal-close {
  position: absolute;
  top: 18px; right: 22px;
  background: none; border: none; cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-soft);
  padding: 4px 8px;
  transition: color var(--transition);
}
.obs-modal-close:hover { color: var(--ink); }

.obs-modal-num {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .2em;
  color: var(--star-blue);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.obs-modal-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 26px;
  color: var(--ink);
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
}
.obs-modal-body {
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-mid);
}
.obs-modal-body h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin: 20px 0 8px;
}
.obs-modal-body p { margin-bottom: 12px; }
.obs-modal-body ul {
  padding-left: 18px;
  margin-bottom: 14px;
}
.obs-modal-body li {
  font-size: 12px;
  line-height: 1.75;
  margin-bottom: 4px;
}
.obs-modal-code {
  background: var(--bg2);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  padding: 16px 18px;
  margin: 12px 0;
  overflow-x: auto;
  white-space: pre;
  color: var(--ink-mid);
}
.obs-modal-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--star-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: border-color var(--transition);
}
.obs-modal-link:hover { border-color: var(--star-blue); }

/* ===== ANIMATIONS ===== */
@keyframes obsIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes obsFade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes obsRotate {
  from { transform: translateY(-50%) rotate(0deg); }
  to   { transform: translateY(-50%) rotate(360deg); }
}
@keyframes obsRotateCCW {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}
@keyframes obsPulse {
  0%, 100% { opacity: .45; r: 3.5; }
  50% { opacity: .85; r: 5; }
}

.obs-ring-outer { transform-origin: center; animation: obsRotate 65s linear infinite; }
.obs-ring-inner { transform-origin: center; animation: obsRotateCCW 42s linear infinite; }
.obs-star-pulse  { animation: obsPulse 3s ease-in-out infinite; }
.obs-star-pulse2 { animation: obsPulse 4.5s ease-in-out .9s infinite; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .obs-featured-grid { grid-template-columns: repeat(2, 1fr); }
  .obs-knowledge-grid { grid-template-columns: repeat(2, 1fr); }
  .obs-know-card.wide { grid-column: span 2; }
  .obs-lab-inner { grid-template-columns: 1fr; }
  .obs-lab-text { border-right: none; border-bottom: 1px solid var(--line-strong); }
  .obs-lab-stats { flex-direction: row; flex-wrap: wrap; gap: 24px; }
  .obs-lab-stat { border-bottom: none; padding-bottom: 0; flex: 1; min-width: 100px; }
  .obs-cta-inner { grid-template-columns: 1fr; }
  .obs-cta-action { text-align: left; }
}

@media (max-width: 680px) {
  .blog-home-wrap { padding: 0 20px 48px; }
  .obs-hero { margin: 0 -20px 40px; padding: 0 20px; }
  .obs-hero-scope { display: none; }
  .obs-hero-meta { display: none; }
  .obs-featured-grid { grid-template-columns: 1fr; }
  .obs-popular-card { grid-template-columns: 56px 1fr; }
  .obs-knowledge-grid { grid-template-columns: repeat(2, 1fr); }
  .obs-cta-inner { padding: 40px 28px; }
  .obs-lab-text, .obs-lab-stats { padding: 36px 28px; }
  body.page-template-template-blog-home .site-header { position: relative !important; }

  /* SPメニュー — 天体テーマ */
  body.page-template-template-blog-home .main-navigation .menu-toggle {
    background: transparent !important;
    border: 1px solid var(--line-strong) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    color: var(--ink-mid) !important;
    padding: 8px 12px !important;
    font-family: var(--font-mono) !important;
    font-size: 16px !important;
    letter-spacing: .05em !important;
  }

  body.page-template-template-blog-home .main-navigation.toggled .main-nav {
    margin-top: 8px !important;
    background: rgba(244,246,251,0.97) !important;
    border: 1px solid var(--line-strong) !important;
    border-radius: 0 !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    box-shadow: 0 8px 24px rgba(107,143,191,.1) !important;
  }

  body.page-template-template-blog-home .main-navigation .main-nav ul li a {
    color: var(--ink-mid) !important;
    font-family: var(--font-mono) !important;
    font-size: 11px !important;
    letter-spacing: .16em !important;
    text-transform: uppercase !important;
    padding: 16px 20px !important;
    border-bottom: 1px solid var(--line) !important;
    background: transparent !important;
  }

  body.page-template-template-blog-home .main-navigation .main-nav ul li a:hover {
    color: var(--star-blue) !important;
    background: rgba(107,143,191,.04) !important;
  }

  /* Hero タイトル改行調整 */
  .obs-hero-title {
    font-size: clamp(36px, 10vw, 48px) !important;
    line-height: 1.12 !important;
    white-space: normal !important;
  }
  .obs-section-head { flex-wrap: wrap; gap: 8px; }
  .obs-section-log { margin-left: 0; width: 100%; }

  /* SP Featured: カードタイトル改行調整 */
  .obs-card-title { font-size: 13px !important; }

  /* SP Popular: body padding調整 */
  .obs-popular-body { padding: 14px 16px !important; }
  .obs-popular-card { grid-template-columns: 48px 1fr !important; }
  .obs-rank-col { padding: 16px 10px !important; }
  .obs-rank-num { font-size: 24px !important; }
  .obs-popular-img {
    display: none !important;
  }
  .obs-popular-img img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
  }

  /* SP Lab stats */
  .obs-lab-stats { flex-direction: column !important; gap: 16px !important; }
  .obs-lab-stat-num { font-size: 32px !important; }
}