:root {
  --color-bg: #faf8f5;
  --color-surface: #ffffff;
  --color-text: #24292e;
  --color-text-muted: #5a6169;
  --color-primary: #1f5c4f;
  --color-primary-dark: #143f36;
  --color-accent: #c98a3b;
  --color-border: #e4ddd2;
  --color-danger-bg: #fdf1ef;
  --color-danger-border: #e8b4ab;
  --max-width: 1080px;
  --radius: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.site-logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.site-logo small {
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 1rem;
  cursor: pointer;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.main-nav a {
  display: block;
  padding: 10px 12px;
  text-decoration: none;
  color: var(--color-text);
  border-radius: 8px;
  font-size: 0.92rem;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  background: var(--color-primary);
  color: #fff;
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(0,0,0,0.06);
  }
  .main-nav.is-open { display: block; }
  .main-nav ul { flex-direction: column; padding: 8px 12px 16px; }
  .main-nav a { padding: 12px; }
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 56px 0 64px;
}
.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 16px;
  line-height: 1.5;
}
.hero p.lede {
  font-size: 1.05rem;
  max-width: 640px;
  opacity: 0.95;
}
.hero-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.hero-badge {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
}

/* Persona selector */
.persona-section { padding: 56px 0; }
.section-title {
  font-size: 1.4rem;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
}
.section-lede {
  color: var(--color-text-muted);
  margin-bottom: 28px;
}
.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.persona-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--color-text);
  display: block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.persona-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(31,92,79,0.12);
  color: var(--color-text);
}
.persona-card .icon { font-size: 1.6rem; margin-bottom: 8px; display: block; }
.persona-card h3 { margin: 0 0 6px; font-size: 1.05rem; color: var(--color-primary-dark); }
.persona-card p { margin: 0; font-size: 0.88rem; color: var(--color-text-muted); }

/* Generic section / cards */
section { padding: 48px 0; }
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.card + .card { margin-top: 16px; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { background: var(--color-primary-dark); color: #fff; }
.btn.secondary {
  background: transparent;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary);
}
.btn.secondary:hover { background: var(--color-primary); color: #fff; }

/* Articles list */
.article-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.filter-chip {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
}
.filter-chip.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.article-list { display: flex; flex-direction: column; gap: 14px; }
.article-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-decoration: none;
  color: var(--color-text);
  display: block;
}
.article-item:hover { border-color: var(--color-primary); color: var(--color-text); }
.article-item .meta { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 6px; }
.article-item h3 { margin: 0 0 6px; font-size: 1.02rem; }
.article-item .tags { margin-top: 8px; }
.tag {
  display: inline-block;
  font-size: 0.72rem;
  background: #eef3f1;
  color: var(--color-primary-dark);
  border-radius: 999px;
  padding: 2px 10px;
  margin-right: 6px;
}
.article-item.is-placeholder { opacity: 0.7; }

/* Article detail */
.article-body { max-width: 720px; }
.article-body h2 { color: var(--color-primary-dark); }
.notice-box {
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-size: 0.92rem;
  margin: 20px 0;
}

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); font-size: 0.92rem; }
th { color: var(--color-text-muted); font-weight: 600; }

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 40px 0;
  margin-top: 48px;
}
.site-footer a { color: #fff; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
.footer-grid h4 { margin: 0 0 10px; font-size: 0.95rem; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 6px; font-size: 0.88rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); margin-top: 24px; padding-top: 16px; font-size: 0.8rem; opacity: 0.7; }