:root {
  --navy-900: #131c34;
  --navy-800: #1b2a4d;
  --navy-700: #223a68;
  --accent: #34c77b;
  --accent-dark: #279a5f;
  --text: #1a1f2b;
  --muted: #5b6472;
  --bg: #f7f8fb;
  --card-bg: #ffffff;
  --border: #e4e7ee;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

img { max-width: 100%; }

a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  background: var(--navy-900);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 24px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: #fff;
  font-size: 1.05rem;
  margin-right: auto;
}
.brand:hover { text-decoration: none; opacity: 0.9; }
.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: block;
}
.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.site-nav a {
  color: rgba(255,255,255,0.82);
  font-size: 0.92rem;
  font-weight: 500;
}
.site-nav a:hover { color: #fff; text-decoration: none; }
.header-cta { flex-shrink: 0; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #0c2818;
  box-shadow: 0 6px 18px rgba(52,199,123,0.35);
}
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.55);
}
.btn-outline:hover { border-color: #fff; }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-700) 100%);
  color: #fff;
  padding: 72px 0 64px;
}
.hero .wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 700;
}
.hero h1 {
  font-size: 2.4rem;
  line-height: 1.4;
  margin: 0;
  max-width: 720px;
}
.hero p.lead {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.82);
  max-width: 640px;
  margin: 0;
}
.hero .cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 8px;
}

/* Sections */
.section {
  padding: 64px 0;
}
.section-tight { padding: 40px 0; }
.section-alt { background: #eef1f8; }
.section h2 {
  font-size: 1.7rem;
  margin: 0 0 12px;
}
.section h2.center { text-align: center; }
.section .section-lead {
  color: var(--muted);
  max-width: 680px;
  margin: 0 0 36px;
}
.section .section-lead.center { margin-left: auto; margin-right: auto; text-align: center; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
}
.feature-card .icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
  display: block;
}
.feature-card h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
}
.feature-card p {
  color: var(--muted);
  font-size: 0.94rem;
  margin: 0;
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, var(--navy-800), var(--navy-700));
  color: #fff;
  border-radius: 24px;
  padding: 48px 40px;
  text-align: center;
  margin: 0 24px;
}
.cta-banner h2 { margin: 0 0 10px; }
.cta-banner p { color: rgba(255,255,255,0.8); margin: 0 0 24px; }

/* Article / blog content */
.article-hero {
  background: linear-gradient(160deg, var(--navy-900), var(--navy-700));
  color: #fff;
  padding: 56px 0 40px;
}
.article-hero .category {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.article-hero h1 {
  font-size: 2rem;
  margin: 10px 0 6px;
  line-height: 1.5;
}
.article-hero .meta {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}
.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 20px;
}
.article-body h2 {
  font-size: 1.4rem;
  margin: 40px 0 14px;
}
.article-body h3 {
  font-size: 1.15rem;
  margin: 28px 0 10px;
}
.article-body p { margin: 0 0 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 1.4em; }
.article-body li { margin-bottom: 6px; }
.article-cta {
  max-width: 760px;
  margin: 20px auto 60px;
  padding: 0 24px;
}

/* Blog list */
.blog-list {
  display: grid;
  gap: 16px;
}
.blog-card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 28px;
}
.blog-card:hover { text-decoration: none; border-color: var(--accent); }
.blog-card .category {
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
}
.blog-card h2 {
  font-size: 1.2rem;
  margin: 8px 0 8px;
  color: var(--text);
}
.blog-card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  background: var(--navy-900);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 28px;
  margin-top: 40px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  max-width: 260px;
}
.footer-brand strong { color: #fff; }
.footer-brand p { margin: 2px 0 0; font-size: 0.85rem; color: rgba(255,255,255,0.55); }
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
}
.footer-nav a { color: rgba(255,255,255,0.75); font-size: 0.9rem; }
.footer-nav a:hover { color: #fff; }
.copyright {
  width: 100%;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

@media (max-width: 720px) {
  .hero h1 { font-size: 1.85rem; }
  .site-nav { display: none; }
  .cta-banner { margin: 0 16px; padding: 36px 24px; }
}