/* ===== BLOG STYLES ===== */
:root {
  --bg: #fafafa;
  --surface: #fff;
  --text: #0a0a0a;
  --muted: #5a5a5a;
  --muted-light: #888;
  --accent: #99b300;
  --accent-soft: rgba(200, 255, 0, 0.12);
  --border: rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.95;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* HEADER */
.bl-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 32px;
}
.bl-header__inner {
  max-width: 880px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.bl-logo { font-family: 'Inter', sans-serif; font-size: 20px; font-weight: 900; }
.bl-logo span { color: var(--accent); }
.bl-nav { display: flex; gap: 24px; }
.bl-nav a { font-size: 13px; font-weight: 600; color: var(--muted); }
.bl-nav a:hover { color: var(--text); }

/* INDEX */
.bl-hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 32px 48px;
  text-align: center;
}
.bl-hero__title {
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.2;
  margin-bottom: 16px;
}
.bl-hero__title em { color: var(--accent); font-style: normal; }
.bl-hero__sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.95;
}

.bl-list { max-width: 760px; margin: 0 auto; padding: 0 32px 100px; }
.bl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  margin-bottom: 16px;
  display: block;
  transition: all 0.3s;
}
.bl-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.bl-card__category {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.bl-card h2 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.4;
  margin-bottom: 12px;
}
.bl-card__excerpt {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 16px;
}
.bl-card__meta {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: var(--muted-light);
}
.bl-card__meta time { font-weight: 600; }

/* ARTICLE */
.bl-article {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 32px 80px;
}
.bl-article__breadcrumb {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: var(--muted-light);
  margin-bottom: 24px;
}
.bl-article__breadcrumb a:hover { color: var(--accent); }
.bl-article__breadcrumb span { margin: 0 8px; }

.bl-article__category {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 5px 12px;
  border-radius: 4px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.bl-article h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -1.2px;
  line-height: 1.3;
  margin-bottom: 20px;
}
.bl-article__meta {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--muted-light);
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

/* ARTICLE BODY */
.bl-body { font-size: 16px; color: var(--text); line-height: 1.95; }
.bl-body p { margin-bottom: 24px; }
.bl-body h2 {
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.5px;
  line-height: 1.4;
  margin: 56px 0 20px;
  padding-top: 16px;
  border-top: 3px solid var(--text);
}
.bl-body h3 {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.3px;
  margin: 36px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
}
.bl-body h4 {
  font-size: 16px;
  font-weight: 800;
  margin: 28px 0 10px;
}
.bl-body ul, .bl-body ol { margin: 16px 0 24px 24px; }
.bl-body li { margin-bottom: 8px; line-height: 1.85; }
.bl-body strong { background: linear-gradient(transparent 60%, var(--accent-soft) 60%); padding: 0 2px; }
.bl-body blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 15px;
  color: var(--muted);
  border-radius: 0 8px 8px 0;
}
.bl-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 56px 0;
}

/* CTA INSIDE ARTICLE */
.bl-cta {
  background: var(--text);
  color: #fff;
  border-radius: 20px;
  padding: 40px 32px;
  margin: 48px 0;
  text-align: center;
}
.bl-cta h3 {
  border: none;
  padding: 0;
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 12px;
  color: #fff;
  letter-spacing: -0.5px;
}
.bl-cta p { color: rgba(255,255,255,0.7); margin-bottom: 24px; font-size: 14px; }
.bl-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: var(--text);
  padding: 14px 28px;
  border-radius: 50px;
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  font-size: 14px;
  transition: all 0.3s;
}
.bl-cta__btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(200,255,0,0.3); }

/* RELATED */
.bl-related {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 32px 80px;
}
.bl-related h3 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 16px;
}
.bl-related__grid { display: flex; flex-direction: column; gap: 8px; }
.bl-related__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.bl-related__item:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* FOOTER */
.bl-footer {
  padding: 40px 32px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--muted-light);
}
.bl-footer a { margin: 0 12px; }
.bl-footer a:hover { color: var(--accent); }

@media (max-width: 600px) {
  .bl-hero { padding: 56px 20px 32px; }
  .bl-list { padding: 0 20px 80px; }
  .bl-article { padding: 40px 20px 60px; }
  .bl-card { padding: 24px 22px; }
  .bl-body h2 { font-size: 22px; }
  .bl-body h3 { font-size: 17px; }
}