:root {
  /* Premium B&W Palette */
  --background: #ffffff;
  --foreground: #1a1a1a;
  /* Softer black */
  --accents-1: #111111;
  --accents-2: #f4f4f4;
  /* Light gray for backgrounds */
  --accents-3: #444444;
  --accents-4: #666666;
  --accents-5: #888888;
  --accents-6: #999999;
  --accents-7: #aeaeae;
  --accents-8: #d7d7d7;
  --border-color: #e5e5e5;

  /* Fonts - Japanese Editorial Stack */
  --font-serif: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "HGSMinchoE", "Times New Roman", serif;
  --font-sans: "Helvetica Neue", "Arial", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", sans-serif;

  --page-width: 1000px;
  /* Narrower for better readability */
  --header-height: 80px;
}

html,
body {
  max-width: 100vw;
  overflow-x: hidden;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-serif);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.8;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.4;
  color: var(--foreground);
}

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s ease, color 0.2s ease;
}

a:hover {
  opacity: 0.7;
}

/* Utilities */
.container {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Premium Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 2000;
  padding: 1.25rem 0;
  border-bottom: 1px solid transparent;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 500;
  color: var(--foreground);
  letter-spacing: 0.05em;
  z-index: 2002;
  position: relative;
}

/* Menu Toggle Button */
.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 2002;
  position: relative;
  font-family: var(--font-sans);
}

.menu-label {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground);
}

.hamburger {
  width: 24px;
  height: 12px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--foreground);
  transition: all 0.3s ease;
}

/* Fullscreen Menu Overlay */
.fullscreen-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  z-index: 2001;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.fullscreen-menu.is-active {
  opacity: 1;
  pointer-events: auto;
}

.menu-content {
  text-align: center;
}

.premium-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.premium-nav-list li {
  margin: 1.5rem 0;
  overflow: hidden;
}

.premium-nav-list a {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--foreground);
  text-decoration: none;
  position: relative;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.5s ease, opacity 0.5s ease;
}

.fullscreen-menu.is-active .premium-nav-list a {
  transform: translateY(0);
  opacity: 1;
}

.nav-num {
  font-size: 0.9rem;
  color: var(--accents-5);
  margin-right: 0.8rem;
  font-family: var(--font-sans);
  font-weight: 300;
}

.nav-jp {
  font-size: 0.9rem;
  font-family: var(--font-serif);
  margin-left: 0.8rem;
  color: var(--accents-4);
  opacity: 0.7;
}

/* Active State for Toggle */
.menu-toggle.is-active .hamburger span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.menu-toggle.is-active .hamburger span:nth-child(2) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ───── Hero Section (Restored) ───── */
.hero {
  border-top: none;
  position: relative;
  height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: visible;
  border-bottom: 1px solid var(--accents-2);
}

.hero .title {
  font-size: 6rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  margin-right: -0.05em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.3s;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--accents-5);
  max-width: 600px;
  line-height: 1.6;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.6s;
  font-family: var(--font-serif);
  font-style: italic;
}

.scrollIndicator {
  position: absolute;
  bottom: -3.5rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeIn 1s ease forwards 1.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 10;
}

.scroll-text {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-right: -0.2em;
  background-color: var(--background);
  padding: 0 0.5rem;
}

.scrollLine {
  display: block;
  width: 1px;
  height: 6rem;
  background-color: var(--foreground);
  margin-top: 0.5rem;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .hero .title {
    font-size: 3rem;
  }
}

/* Search Bar */
.search-container {
  margin: 4rem auto;
  max-width: 600px;
  text-align: center;
}

.search-input-wrapper {
  position: relative;
  width: 100%;
  border-bottom: 1px solid var(--accents-2);
}

.search-input {
  width: 100%;
  padding: 1rem 0;
  border: none;
  background: transparent;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--foreground);
  text-align: center;
  outline: none;
}

.search-input::placeholder {
  color: var(--accents-3);
  opacity: 0.5;
}

.search-input:focus {
  border-bottom: 1px solid var(--foreground);
}

.search-icon {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--foreground);
}

/* ───── Article Detail Styles (New Editorial) ───── */
.article-container {
  max-width: 800px;
  /* Optimal reading width */
  margin: 0 auto;
  padding: 6rem 24px 4rem;
}

.article-header {
  text-align: center;
  margin-bottom: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.article-meta {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accents-5);
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.article-title {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  line-height: 1.4;
  font-weight: 500;
}

.article-author {
  font-style: italic;
  font-size: 0.9rem;
  color: var(--accents-5);
}

.article-image {
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: cover;
  margin-bottom: 4rem;
}

/* Typography & Content Layout */
.article-content {
  font-size: 1.05rem;
  line-height: 2;
  color: #333;
}

.article-content p {
  margin-bottom: 2rem;
  text-align: justify;
}

/* Headings */
.article-content h2 {
  font-size: 1.6rem;
  margin: 4rem 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--foreground);
  font-weight: 500;
  text-align: center;
  letter-spacing: 0.05em;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 3rem 0 1.5rem;
  font-weight: 600;
  padding-left: 1rem;
  border-left: 3px solid var(--foreground);
  line-height: 1.3;
}

.article-content h4 {
  font-size: 1.1rem;
  margin: 2rem 0 1rem;
  font-weight: 700;
}

/* Lists */
.article-content ul,
.article-content ol {
  margin: 0 0 2rem 1.5rem;
  padding-left: 1rem;
}

.article-content li {
  margin-bottom: 0.8rem;
}

/* Tables - Modern & Clean */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 3rem 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.article-content th,
.article-content td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.article-content th {
  font-weight: 600;
  color: var(--accents-4);
  background-color: #fafafa;
  white-space: nowrap;
  width: 30%;
}

/* Box / Conclusion Style */
.article-content .conclusion-box,
.article-lead {
  background-color: #fcfcfc;
  border: 1px solid var(--border-color);
  padding: 2rem;
  margin: 3rem 0;
  font-style: italic;
}

.article-lead {
  font-size: 1.1rem;
  border: none;
  background-color: transparent;
  padding: 0;
  border-left: 2px solid var(--accents-8);
  padding-left: 1.5rem;
}

/* ───── FAQ Section ───── */
.faq-section,
.article-faq-section {
  margin-top: 0;
  border-top: 1px solid var(--border-color);
  padding-top: 3rem;
  padding-bottom: 4rem;
  /* スクロールアニメーション初期状態 */
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

/* スクロールで表示されたとき */
.faq-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* FAQ質問リスト */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

/* 各FAQ項目 */
.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

/* Summary（質問行） */
.faq-item summary {
  padding: 1.25rem 2.5rem 1.25rem 0;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  position: relative;
  color: var(--foreground);
  transition: color 0.3s ease;
}

.faq-item summary:hover {
  color: var(--accents-5);
}

/* デフォルトの▶マーカーを非表示 */
.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::marker {
  display: none;
  content: '';
}

/* Q. ラベル */
.faq-q {
  color: var(--accents-4);
  margin-right: 0.75rem;
  font-weight: 400;
}

/* ＋アイコン（2本の線で構成） */
.faq-item summary::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background-color: var(--foreground);
  transform: translateY(-50%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease;
}

.faq-item summary::before {
  content: '';
  position: absolute;
  right: 6.5px;
  top: 50%;
  width: 1px;
  height: 14px;
  background-color: var(--foreground);
  transform: translateY(-50%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease;
}

/* 開いた状態：＋ → − （縦線を消す） */
.faq-item[open] summary::before {
  transform: translateY(-50%) scaleY(0);
  opacity: 0;
}

/* 回答エリア */
.faq-answer {
  overflow: hidden;
}

/* 回答の中身 */
.faq-answer-inner {
  padding: 0 0 1.5rem 1.75rem;
  color: #444;
  line-height: 1.8;
  font-size: 0.95rem;
}

/* ───── FAQ レスポンシブ ───── */
@media (max-width: 768px) {
  .faq-section {
    padding-top: 2.5rem;
    padding-bottom: 3rem;
  }

  .faq-item summary {
    font-size: 0.95rem;
    padding: 1rem 2rem 1rem 0;
  }

  .faq-answer-inner {
    padding-left: 0;
    font-size: 0.9rem;
  }
}

/* ───── Article Grid (New) ───── */
.article-grid-container {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 24px 4rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--foreground);
}

.article-card:hover .card-image {
  transform: scale(1.05);
}

.card-image-wrapper {
  display: block;
  width: 100%;
  position: relative;
  padding-bottom: 66.67%;
  /* 3:2 aspect ratio via padding */
  overflow: hidden;
  margin-bottom: 1rem;
  background-color: var(--accents-2);
}

.card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.card-meta {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accents-5);
  margin-bottom: 0.5rem;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
  color: var(--foreground);
}

.card-excerpt {
  font-size: 0.9rem;
  color: var(--accents-4);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ───── Components (Restored) ───── */
.section-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
  font-weight: 400;
}

.jp-title {
  display: block;
  font-family: "Yu Mincho", serif;
  font-size: 0.9rem;
  color: var(--accents-5);
  margin-top: 0.5rem;
  letter-spacing: 0.1em;
}

.load-more-container {
  text-align: center;
  margin-top: 4rem;
}

.read-more-btn {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1px solid var(--foreground);
  background: transparent;
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
}

.read-more-btn:hover {
  background-color: var(--foreground);
  color: var(--background);
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem;
  color: var(--accents-5);
  font-family: var(--font-serif);
  font-style: italic;
  display: none;
}

.no-results.visible {
  display: block;
}

/* ───── Sticky CTA Bar ───── */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--foreground);
  color: #fff;
  padding: 0;
  z-index: 999;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
}

.sticky-cta.visible {
  transform: translateY(0);
}

.sticky-cta-content {
  max-width: var(--page-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 1.5rem;
}

.sticky-cta-thumb {
  width: 36px;
  height: 36px;
  border-radius: 2px;
  object-fit: cover;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.15);
}

.sticky-cta-text {
  flex: 1;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.02em;
}

.sticky-cta-btn {
  flex-shrink: 0;
  background: #fff;
  color: var(--foreground);
  padding: 0.55rem 1.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-radius: 2px;
  transition: opacity 0.2s ease;
  white-space: nowrap;
}

.sticky-cta-btn:hover {
  opacity: 0.85;
}

/* ───── Footer (Restored) ───── */
.site-footer {
  background-color: var(--accents-1);
  color: var(--background);
  padding: 6rem 0 2rem;
  border-top: 1px solid var(--accents-2);
  margin-top: auto;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-brand {
  margin-bottom: 4rem;
  text-align: center;
}

.footer-layout {
  display: flex;
  width: 100%;
  max-width: var(--page-width);
  justify-content: space-between;
  border-top: 1px solid var(--accents-3);
  border-bottom: 1px solid var(--accents-3);
  padding: 4rem 0;
  margin-bottom: 2rem;
}

.footer-nav {
  display: flex;
  gap: 6rem;
}

.footer-column h4 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  color: var(--accents-6);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--background);
  opacity: 0.8;
}

.footer-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ───── Footer Newsletter ───── */
.footer-newsletter {
  max-width: 360px;
  width: 100%;
}

.footer-newsletter p {
  font-size: 0.85rem;
  color: var(--accents-5);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.newsletter-form {
  display: flex;
  position: relative;
  border-bottom: 1px solid var(--accents-4);
  transition: border-color 0.3s ease;
}

.newsletter-form:focus-within {
  border-color: var(--background);
}

.newsletter-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.75rem 0;
  color: var(--background);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
}

.newsletter-form input::placeholder {
  color: var(--accents-5);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.newsletter-form button {
  background: transparent;
  border: none;
  color: var(--background);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0 0.5rem;
  transition: opacity 0.3s ease, transform 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.newsletter-form button:hover {
  opacity: 0.7;
  transform: translateX(3px);
}

.newsletter-form button svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

.footer-bottom {
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--accents-5);
  letter-spacing: 0.05em;
  width: 100%;
}

/* ───── Breadcrumb ───── */
.breadcrumb {
  max-width: var(--page-width);
  margin: 6rem auto 0;
  padding: 0 24px;
}

.breadcrumb-list {
  display: flex;
  list-style: none;
  padding: 0;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--accents-5);
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb-list li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--accents-7);
}

.breadcrumb-current {
  font-weight: 700;
  color: var(--foreground);
}

/* ───── Article Layout (Sidebar) ───── */
@media (min-width: 1025px) {
  .article-container {
    max-width: var(--page-width);
    padding: 4rem 40px;
  }

  .article-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 4rem;
    align-items: start;
    position: relative;
  }

  .article-sidebar {
    position: -webkit-sticky;
    position: sticky;
    top: 100px;
    height: fit-content;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    will-change: transform;
  }

  .has-sale-banner .article-sidebar {
    top: 140px;
    max-height: calc(100vh - 160px);
  }
}

@media (max-width: 1024px) {
  .article-layout {
    display: block;
  }

  .article-sidebar {
    display: none;
  }
}

/* ───── TOC ───── */
.toc-container {
  padding-left: 2rem;
  border-left: 1px solid var(--accents-2);
}

.toc-title {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accents-4);
  margin-bottom: 1rem;
  font-weight: 700;
}

.toc-list {
  list-style: none;
  padding: 0;
}

.toc-list li {
  margin-bottom: 0.8rem;
}

.toc-link {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--accents-5);
}

.toc-link:hover {
  color: var(--foreground);
}

/* ───── Affiliate CTA Block ───── */
.affiliate-cta-block {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--accents-2);
  border-radius: 2px;
  position: relative;
}

.affiliate-cta-label {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accents-5);
  text-transform: uppercase;
  margin: 0;
}

.affiliate-cta-inner {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.affiliate-cta-image {
  flex-shrink: 0;
  width: 140px;
  height: 140px;
  background: #fff;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.affiliate-cta-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.affiliate-cta-body {
  flex: 1;
  min-width: 0;
}

.affiliate-cta-name {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--foreground);
}

.affiliate-cta-desc {
  margin: 0 0 1.25rem;
  font-size: 0.8rem;
  color: var(--accents-5);
  line-height: 1.6;
}

/* ───── Multi-EC Buttons ───── */
.ec-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.ec-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 2px;
  transition: opacity 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
  color: #fff;
  flex: 1;
  min-width: 120px;
}

.ec-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.ec-btn-rakuten {
  background: #bf0000;
}

.ec-btn-amazon {
  background: #232f3e;
}

.ec-btn-yahoo {
  background: #ff0033;
}

/* ───── Rate-Up Badge ───── */
.rate-up-badge {
  display: inline-block;
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.1rem 0.35rem;
  border: 1px solid #bf0000;
  color: #bf0000;
  border-radius: 2px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

@media (max-width: 600px) {
  .affiliate-cta-inner {
    flex-direction: column;
    text-align: center;
  }

  .affiliate-cta-image {
    width: 120px;
    height: 120px;
    margin: 0 auto;
  }

  .ec-buttons {
    flex-direction: column;
  }

  .ec-btn {
    min-width: 0;
  }
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
}

.spec-table th,
.spec-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.spec-table th {
  width: 30%;
  background: #fafafa;
  font-weight: 700;
  color: var(--accents-3);
}

/* ───── Concerns Hub ───── */
.concerns-hub-hero {
  height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  border-bottom: 1px solid var(--accents-2);
}

.concerns-hub-label {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.concerns-hub-title {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.concern-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.concern-card {
  display: flex;
  flex-direction: column;
}

.concern-card-image-wrapper {
  display: block;
  width: 100%;
  position: relative;
  padding-bottom: 100%;
  /* 1:1 aspect ratio */
  margin-bottom: 1rem;
  overflow: hidden;
  background: var(--accents-2);
}

.concern-card-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.concern-card-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

/* ───── Comparison Table ───── */
.comparison-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 2rem 0;
  border-radius: 2px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  line-height: 1.6;
}

.comparison-table thead {
  background: var(--foreground);
  color: #fff;
}

.comparison-table th,
.comparison-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--accents-2);
  text-align: left;
  vertical-align: top;
}

.comparison-table thead th {
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border-color: rgba(255, 255, 255, 0.15);
}

.comparison-table tbody th {
  background: var(--accents-1);
  font-weight: 600;
  white-space: nowrap;
  min-width: 100px;
}

.comparison-table tbody tr:hover {
  background: var(--accents-2);
}

.comparison-table tbody td {
  min-width: 120px;
}

/* ───── Inline CTA Button (inside comparison tables) ───── */
.inline-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  background: #bf0000;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
  margin-top: 0.5rem;
}

.inline-cta-btn:hover {
  background: #a00;
  transform: translateY(-1px);
}

.inline-cta-btn svg {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
}

/* ───── Sale Banner ───── */
.sale-banner {
  background: #222;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.45rem 1.5rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.site-wrapper.has-sale-banner .site-header {
  top: 2.5rem;
}

.site-wrapper.has-sale-banner {
  padding-top: 2.5rem;
}

.sale-banner a {
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  margin-left: 0.5rem;
  transition: border-color 0.2s ease;
}

.sale-banner a:hover {
  border-color: #fff;
}

.sale-banner-label {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: 0.08rem 0.4rem;
  font-size: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-right: 0.5rem;
  vertical-align: middle;
  color: #fff;
}

.sale-badge {
  display: none;
}

/* ───── Author Box ───── */
.author-box {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--accents-1);
  border-radius: 2px;
  border-top: 2px solid var(--foreground);
}

.author-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accents-3);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--foreground);
}

.author-info {
  flex: 1;
  min-width: 0;
}

.author-name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--foreground);
}

.author-title {
  font-size: 0.75rem;
  color: var(--accents-5);
  letter-spacing: 0.05em;
  margin: 0 0 0.5rem;
}

.author-bio {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--accents-6);
  margin: 0;
}

/* ───── Mobile Responsive ───── */
@media (max-width: 768px) {
  .article-title {
    font-size: 1.8rem;
  }

  .article-content {
    font-size: 1rem;
  }

  .article-grid,
  .concern-grid {
    grid-template-columns: 1fr;
  }

  .sticky-cta-thumb {
    display: none;
  }

  .sticky-cta-text {
    font-size: 0.7rem;
  }

  .sticky-cta-content {
    padding: 0.6rem 1rem;
  }

  .sticky-cta-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.7rem;
  }

  .footer-layout {
    flex-direction: column;
    gap: 3rem;
    align-items: center;
  }

  .footer-nav {
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    text-align: center;
  }

  .affiliate-cta-inner {
    flex-direction: column;
    text-align: center;
  }

  .affiliate-cta-image {
    width: 120px;
    height: 120px;
    margin: 0 auto;
  }

  .affiliate-cta-btn {
    width: 100%;
    justify-content: center;
  }

  .author-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .comparison-table {
    font-size: 0.75rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 0.5rem 0.65rem;
  }
}

/* ========== SNS Share Buttons ========== */
.sns-share-buttons {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--accents-8);
}

.sns-share-label {
  font-size: 0.8rem;
  font-family: var(--font-sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accents-5);
}

.sns-share-links {
  display: flex;
  gap: 0.5rem;
}

.sns-share-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--accents-8);
  border-radius: 50%;
  color: var(--accents-4);
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.sns-share-link:hover {
  color: var(--background);
  background-color: var(--foreground);
  border-color: var(--foreground);
}

/* ========== Footer SNS Links ========== */
.footer-sns {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.footer-sns a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--accents-5);
  border: 1px solid var(--accents-8);
  border-radius: 50%;
  transition: color 0.2s, border-color 0.2s;
}

.footer-sns a:hover {
  color: var(--foreground);
  border-color: var(--foreground);
}

@media (max-width: 768px) {
  .sns-share-buttons {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .footer-sns {
    justify-content: center;
  }
}