/* 小さなお店のための業種別AIお困り解決帳 - スタイルシート v3 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --black: #000000;
  --blue: #35a0d9;
  --blue-dark: #2a8bc2;
  --blue-light: #e8f4fc;
  --gold: #a39463;
  --gold-light: #f5f0e4;
  --text: #2d2d2d;
  --text-light: #666;
  --text-muted: #999;
  --bg: #f5f6f8;
  --white: #fff;
  --border: #e2e5ea;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 8px rgba(0,0,0,0.06), 0 12px 28px rgba(0,0,0,0.08);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.85;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); transition: color var(--transition); }
a:hover { color: var(--blue-dark); }

/* ========== ヘッダー ========== */
header {
  background: var(--black);
  color: var(--white);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
}
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.logo {
  color: var(--white);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.35;
  min-width: 0;
  flex: 1;
  overflow-wrap: anywhere;
}
.logo-accent { color: var(--blue); }
.header-nav { display: flex; gap: 0.25rem; flex-shrink: 0; }
.header-nav a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: background var(--transition);
}
.header-nav a:hover { background: rgba(255,255,255,0.1); color: var(--white); }
.header-nav a.nav-cta {
  background: var(--blue);
  font-weight: 700;
}
.header-nav a.nav-cta:hover { background: var(--blue-dark); }
.tagline {
  color: var(--text-muted);
  font-size: 0.7rem;
  margin-top: 0.15rem;
  letter-spacing: 0.02em;
}

/* ========== メイン ========== */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}

/* ========== パンくずリスト ========== */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-light); text-decoration: none; }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 0.3rem; color: #ccc; }

/* ========== フッター ========== */
footer {
  background: var(--black);
  color: #888;
  padding: 2.5rem 1.5rem;
  margin-top: 2rem;
}
.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  color: #aaa;
  text-decoration: none;
  font-size: 0.78rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--blue); }
.footer-copy { font-size: 0.72rem; color: #666; }
.footer-copy a { color: var(--gold); text-decoration: none; }

/* ===================================
   トップページ
   =================================== */

/* ヒーロー */
.hero {
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -50%; right: -20%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(53,160,217,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -30%; left: -10%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(163,148,99,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero h1 {
  font-size: 1.75rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  line-height: 1.35;
  position: relative;
}
.hero .hero-sub {
  color: var(--gold);
  font-size: 0.92rem;
  margin-bottom: 1rem;
  position: relative;
}
.hero-stats {
  display: flex;
  gap: 1.5rem;
  position: relative;
}
.hero-stat {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}
.hero-stat-num {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--blue);
}
.hero-stat-label {
  font-size: 0.78rem;
  color: #999;
}

/* カテゴリフィルター */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.category-btn {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.85rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  color: var(--text-light);
  font-weight: 500;
}
.category-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-light);
}
.category-btn.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

/* 記事一覧 */
.article-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.article-list li {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.article-list li:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--blue);
  transform: translateY(-1px);
}
.article-list .article-title {
  text-decoration: none;
  color: var(--black);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.5;
  display: block;
}
.article-list .article-title:hover { color: var(--blue); }
.article-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.article-excerpt {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}
.tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-dark);
  font-size: 0.68rem;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.read-time {
  font-size: 0.72rem;
  color: var(--text-muted);
}
.article-meta-dot {
  width: 3px; height: 3px;
  background: #ccc;
  border-radius: 50%;
}

/* ===================================
   記事ページ
   =================================== */
article {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem 2.25rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

article h1 {
  font-size: 1.65rem;
  font-weight: 900;
  margin-bottom: 0.6rem;
  line-height: 1.4;
  color: var(--black);
  letter-spacing: -0.01em;
}
article .article-header-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}
article h2 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 2.5rem 0 1rem;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--blue);
  background: var(--blue-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--black);
}
article h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 1.75rem 0 0.5rem;
  color: #1a1a1a;
  padding-left: 0.75rem;
  border-left: 2px solid var(--gold);
}
article p {
  margin-bottom: 1.1rem;
  font-size: 0.94rem;
  line-height: 1.9;
}
article ul, article ol {
  margin: 0.75rem 0 1.25rem 1.5rem;
}
article li {
  margin-bottom: 0.4rem;
  font-size: 0.94rem;
}
article code {
  background: #f0f2f5;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
  color: #c7254e;
}
article strong {
  color: var(--black);
  font-weight: 700;
}
article .table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
}
article table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.9rem;
}
article th,
article td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
}
article th {
  background: var(--blue-light);
  color: var(--black);
  font-weight: 800;
}
article tr:last-child td {
  border-bottom: none;
}
article tbody tr:nth-child(even) {
  background: #fafafa;
}

/* 目次 */
.toc {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}
.toc-title {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.toc ol {
  margin: 0;
  padding-left: 1.25rem;
  counter-reset: toc-counter;
}
.toc li {
  margin-bottom: 0.25rem;
  font-size: 0.84rem;
  line-height: 1.6;
}
.toc a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}
.toc a:hover { color: var(--blue); }

/* ========== アフィリエイトカード v3 ========== */
.aff-section {
  margin: 2.5rem 0;
}
.aff-section-intro {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  padding-left: 0.25rem;
}
.aff-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
  transition: all var(--transition);
}
.aff-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--blue);
}
.aff-card-inner {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0;
}
/* 書籍画像エリア */
.aff-book-img {
  flex-shrink: 0;
  width: 140px;
  background: #f8f9fb;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  border-right: 1px solid var(--border);
}
.aff-book-img img {
  width: 100%;
  max-width: 96px;
  height: auto;
  border-radius: 4px;
  box-shadow: 2px 4px 12px rgba(0,0,0,0.12);
  transition: transform 0.3s;
}
.aff-card:hover .aff-book-img img {
  transform: scale(1.03);
}
/* コンテンツエリア */
.aff-content {
  flex: 1;
  min-width: 0;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.aff-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--gold-light);
  color: var(--gold);
  font-size: 0.62rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  width: fit-content;
  text-transform: uppercase;
}
.aff-book-title {
  color: var(--black);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  line-height: 1.45;
}
.aff-book-meta {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}
.aff-review {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  margin-bottom: 0.6rem;
}
.aff-review-stars { color: #f5a623; letter-spacing: 0.05em; }
.aff-review-count { color: var(--text-muted); }
.aff-label {
  color: var(--black);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}
.aff-sub {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 0.6rem;
}
.aff-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #bf0000;
  color: var(--white);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.8rem;
  transition: all var(--transition);
  width: fit-content;
}
.aff-btn:hover {
  background: #d40000;
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(191, 0, 0, 0.2);
}
.aff-arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}
.aff-btn:hover .aff-arrow {
  transform: translateX(2px);
}
/* 旅館用 */
.aff-travel { padding: 1.5rem; }
.aff-travel-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  background: var(--blue-light);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue);
  margin-right: 1rem;
}
.aff-travel-icon svg { width: 22px; height: 22px; }
@media (max-width: 600px) {
  .aff-card-inner { flex-direction: column; }
  .aff-book-img { width: 100%; padding: 1rem; border-right: none; border-bottom: 1px solid var(--border); }
  .aff-book-img img { max-width: 72px; }
  .aff-content { padding: 1rem 1.25rem 1.25rem; }
  .aff-travel { flex-direction: row; }
}

/* ========== CTAボックス v3 ========== */
.cta-box {
  background: var(--white);
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2.5rem 0 1rem;
  text-align: center;
  position: relative;
}
.cta-box::before {
  content: "\2728";
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  padding: 0 0.5rem;
  font-size: 1.2rem;
}
.cta-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--black);
  margin-bottom: 0.6rem;
}
.cta-box p {
  margin-bottom: 1rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-light);
}
.cta-btn {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  padding: 0.75rem 2.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  transition: all var(--transition);
}
.cta-btn:hover {
  background: var(--blue-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(53, 160, 217, 0.3);
}

/* ========== 関連記事 ========== */
.related-articles {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.related-articles h2 {
  border-left: none;
  background: none;
  padding: 0;
  font-size: 1.05rem;
  margin: 0 0 0.75rem;
  font-weight: 800;
}
.related-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}
.related-list li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  margin: 0;
  transition: all var(--transition);
}
.related-list li:hover {
  border-color: var(--blue);
  background: var(--blue-light);
}
.related-list a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 500;
  line-height: 1.5;
}
.related-list a:hover { color: var(--blue); }
.related-list .tag { font-size: 0.62rem; margin-bottom: 0.25rem; }

/* ========== SaaSツールカード ========== */
.saas-card {
  margin: 1.5rem 0;
}
.saas-card-inner {
  background: linear-gradient(135deg, #f0f9ff 0%, #e8f4fd 100%);
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}
.saas-content {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.saas-badge {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 3px;
  width: fit-content;
}
.saas-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  margin: 0;
}
.saas-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 0;
  line-height: 1.5;
}
.saas-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
  background: var(--blue);
  color: var(--white);
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  width: fit-content;
  transition: all var(--transition);
}
.saas-btn:hover {
  background: var(--blue-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(53, 160, 217, 0.3);
}

/* ========== 内部リンク ========== */
.inline-related {
  background: var(--bg);
  border-left: 3px solid var(--blue);
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  font-size: 0.88rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.inline-link {
  color: var(--blue);
  font-weight: 600;
  text-decoration: underline;
}
.inline-link:hover {
  color: var(--blue-dark);
}

/* ========== サービス言及（インライン） ========== */
.service-mention {
  background: #faf8f4;
  border-left: 3px solid var(--gold);
  padding: 0.75rem 1rem;
  margin: 1.25rem 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.service-mention a {
  color: var(--gold);
  font-weight: 600;
  text-decoration: underline;
}
.service-mention a:hover {
  opacity: 0.8;
}

/* ========== 注意書き ========== */
.disclaimer {
  margin: 2rem 0 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.disclaimer p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== 更新日バッジ ========== */
.last-updated {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* ========== レスポンシブ ========== */
@media (max-width: 600px) {
  main { padding: 1rem 1rem 3rem; }
  article { padding: 1.5rem 1.25rem; border-radius: var(--radius-sm); }
  article h1 { font-size: 1.3rem; }
  article h2 { font-size: 1.1rem; padding: 0.6rem 0.75rem; }
  .hero { padding: 2rem 1.25rem; border-radius: var(--radius-sm); }
  .hero h1 { font-size: 1.35rem; }
  .hero-stats { gap: 1rem; }
  .hero-stat-num { font-size: 1.3rem; }
  .header-inner { padding: 0.75rem 1rem; }
  .header-nav a { font-size: 0.75rem; padding: 0.3rem 0.6rem; }
  .related-list { grid-template-columns: 1fr; }
  .category-filter { gap: 0.3rem; }
  .category-btn { font-size: 0.72rem; padding: 0.25rem 0.65rem; }
  .footer-inner { flex-direction: column; gap: 0.75rem; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}