:root{
  --brand:#5eb451;
  --brand-ink:#2c6a2b;
  --ink:#222;
  --muted:#6b7280;
  --bg:#f7f7f8;
  --card:#fff;
  --border:#e5e7eb;
  --radius:14px;
  --shadow:0 6px 18px rgba(0,0,0,.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

.container{width:min(1100px,92%);margin-inline:auto}

.skiplink{
  position:absolute;left:-9999px;top:auto
}
.skiplink:focus{
  left:8px;top:8px;background:#000;color:#fff;padding:8px 12px;border-radius:8px;z-index:999
}

/* Header */
.site-header{
  background:linear-gradient(180deg,var(--brand),#67c45b);
  color:#fff;
  position:sticky;top:0;z-index:50;
  box-shadow:0 2px 10px rgba(0,0,0,.05);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;gap:12px;align-items:center}
.logo{width:44px;height:44px;border-radius:12px;background:#fff;object-fit:cover}
.site-title{font-size:1.25rem;line-height:1.2;margin:0}
.site-subtitle{margin:2px 0 0 0;opacity:.9;font-size:.95rem}

.top-nav{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.top-nav a{
  color:#fff;text-decoration:none;font-weight:600;opacity:.95
}
.top-nav a:hover{text-decoration:underline}
.top-nav .cta{
  background:#fff;color:var(--brand-ink);padding:8px 12px;border-radius:999px;box-shadow:var(--shadow)
}

/* Banner */
.banner{background:#eef8ee;border-bottom:1px solid var(--border)}
.banner-inner{padding:16px 0}
.banner p{margin:0}

/* Main */
.main{display:grid;gap:20px;margin:20px auto}

/* Card */
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:22px;
}

/* CTA cards */
.cta-grid{display:grid;gap:12px;margin:14px 0}
@media (min-width:720px){.cta-grid{grid-template-columns:1fr 1fr}}
.cta-card{
  display:block;background:#f7fff7;border:1px solid var(--border);border-radius:12px;
  padding:14px 16px;text-decoration:none;box-shadow:var(--shadow)
}
.cta-card:hover{background:#f1fff1}
.cta-eyebrow{display:block;color:var(--muted);font-size:.9rem;margin-bottom:4px}
.cta-title{display:block;color:var(--brand-ink);margin-bottom:2px}
.cta-desc{display:block;color:#374151;font-size:.95rem}
.small{font-size:.92rem;color:var(--muted);margin-top:10px}

/* TOC */
.toc-group{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.toc-group > li{padding:12px;border:1px solid var(--border);border-radius:10px;background:#fafafa}
.toc-heading{display:block;font-weight:700;color:var(--brand-ink);margin-bottom:6px}
.toc-group ol{margin:6px 0 0 1rem;padding:0;display:grid;gap:6px}
.toc-group a{color:var(--ink);text-decoration:none}
.toc-group a:hover{text-decoration:underline;color:var(--brand-ink)}

/* back to TOC */
.backtotop{margin-top:12px}
.backtotop a{font-size:.95rem;color:var(--brand-ink);text-decoration:none}
.backtotop a:hover{text-decoration:underline}

/* Flow */
.flow-header h2{margin-top:0}
.flow-lead{color:var(--muted);margin:.25rem 0 0}

.steps{list-style:none;margin:0;padding:0;display:grid;gap:22px}
.step{
  border-left:4px solid var(--brand);
  background:linear-gradient(90deg,#f8fff8,transparent 60%);
  padding:14px 14px 14px 16px;
  border-radius:10px;
}
.step h3{margin:.25rem 0 .25rem}
.step img{
  display:block;width:100%;height:auto;border-radius:12px;
  border:1px solid var(--border);margin-top:10px
}

.tip,.note{
  background:#f1f8ff;border-left:4px solid #3b82f6;color:#0f172a;
  padding:10px 12px;border-radius:10px;margin:10px 0
}
.note{background:#fff8e6;border-left-color:#f59e0b;color:#3b2f00}

/* Lists */
.checklist{margin:10px 0 0 0;padding-left:20px}
.checklist li{margin:6px 0}

/* Support */
.list-inline{display:flex;gap:12px;flex-wrap:wrap;margin:10px 0 0;padding:0;list-style:none}
.list-inline a{color:var(--brand-ink);text-decoration:none}
.list-inline a:hover{text-decoration:underline}

/* Footer */
.site-footer{margin:24px 0 40px}
.footer-inner{
  display:flex;gap:14px;align-items:center;flex-wrap:wrap;
  color:var(--muted)
}
.site-footer a{color:var(--muted);text-decoration:none}
.site-footer a:hover{text-decoration:underline}

/* Responsive */
@media (max-width:720px){
  .header-inner{gap:10px}
  .top-nav{gap:10px}
  .top-nav a{font-size:.95rem}
}