@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;600&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --green-50: #E8F5F0;
  --green-100: #C3E6D8;
  --green-500: #1D9E75;
  --green-700: #0F6E56;
  --green-900: #04342C;
  --amber-50: #FEF8EC;
  --amber-500: #BA7517;
  --amber-900: #412402;
  --red-50: #FEF0F0;
  --red-500: #E24B4A;
  --gray-50: #F8F7F4;
  --gray-100: #EDEBE6;
  --gray-300: #C8C5BC;
  --gray-500: #888780;
  --gray-700: #4A4945;
  --gray-900: #1E1D1B;
  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: #FAFAF8;
  color: var(--gray-900);
  line-height: 1.7;
  min-height: 100vh;
}

/* NAV */
.site-nav {
  background: white;
  border-bottom: 1px solid var(--gray-100);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 24px;
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.logo {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  text-decoration: none;
}
.logo span { color: var(--green-500); }
.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  font-size: 13px;
  color: var(--gray-500);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--green-50);
  color: var(--green-700);
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--gray-700); margin: 4px 0; border-radius: 2px; transition: 0.2s; }

/* LAYOUT */
.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }
.page-wrap { padding: 48px 0 80px; }

/* HERO */
.hero {
  background: var(--green-900);
  color: white;
  padding: 72px 24px 64px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(29,158,117,0.15);
}
.hero-inner { max-width: 900px; margin: 0 auto; position: relative; }
.hero-badge {
  display: inline-block;
  font-size: 11px;
  background: rgba(29,158,117,0.3);
  color: var(--green-100);
  border: 1px solid rgba(29,158,117,0.4);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 16px;
}
.hero h1 em { font-style: normal; color: #5DCAA5; }
.hero p { font-size: 15px; color: rgba(255,255,255,0.75); max-width: 560px; margin-bottom: 28px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary {
  display: inline-block;
  background: var(--green-500);
  color: white;
  font-size: 14px;
  font-weight: 500;
  padding: 11px 24px;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--green-700); transform: translateY(-1px); }
.btn-ghost {
  display: inline-block;
  background: transparent;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  padding: 11px 24px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.25);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); }

/* CARDS */
.card {
  background: white;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

/* SECTIONS */
.section { margin: 40px 0; }
.section-label {
  font-size: 11px;
  color: var(--green-500);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.section h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 14px;
}
.section h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 24px 0 10px;
}
.section p { font-size: 15px; color: var(--gray-700); line-height: 1.8; margin-bottom: 12px; }

/* HIGHLIGHT / ALERT */
.highlight {
  background: var(--green-50);
  border-left: 3px solid var(--green-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 18px;
  margin: 16px 0;
}
.highlight p { color: var(--green-900); margin: 0; font-size: 14px; }
.alert-box {
  background: var(--amber-50);
  border-left: 3px solid var(--amber-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 18px;
  margin: 16px 0;
}
.alert-box p { color: var(--amber-900); margin: 0; font-size: 14px; }
.danger-box {
  background: var(--red-50);
  border-left: 3px solid var(--red-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 18px;
  margin: 16px 0;
}
.danger-box p { color: #7F1F1F; margin: 0; font-size: 14px; }

/* TABLE */
.table-wrap { overflow-x: auto; margin: 16px 0; border-radius: var(--radius-md); border: 1px solid var(--gray-100); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { background: var(--gray-50); color: var(--gray-500); font-weight: 700; font-size: 12px; padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--gray-100); }
td { padding: 10px 14px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
tr:last-child td { border-bottom: none; }
.td-green { color: var(--green-700); font-weight: 700; }
.td-red { color: var(--red-500); }

/* STEP LIST */
.step-list { list-style: none; display: flex; flex-direction: column; gap: 14px; margin: 16px 0; }
.step-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: white;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}
.step-num {
  min-width: 28px; height: 28px;
  background: var(--green-500);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  margin-top: 2px;
}
.step-body strong { display: block; font-size: 15px; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.step-body span { font-size: 13px; color: var(--gray-500); line-height: 1.6; }

/* BADGE */
.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 700;
}
.badge-green { background: var(--green-50); color: var(--green-700); }
.badge-amber { background: var(--amber-50); color: var(--amber-500); }
.badge-red { background: var(--red-50); color: var(--red-500); }
.badge-gray { background: var(--gray-100); color: var(--gray-500); }

/* CTA BOX */
.cta-box {
  background: var(--green-900);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin: 40px 0;
  color: white;
}
.cta-box h3 { font-family: var(--font-serif); font-size: 18px; color: white; margin-bottom: 8px; }
.cta-box p { font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 18px; }

/* FOOTER */
.site-footer {
  background: var(--gray-900);
  color: rgba(255,255,255,0.5);
  padding: 40px 24px;
  margin-top: 80px;
}
.footer-inner { max-width: 900px; margin: 0 auto; }
.footer-logo { font-family: var(--font-serif); font-size: 16px; color: white; margin-bottom: 8px; }
.footer-logo span { color: var(--green-500); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; margin: 16px 0; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-links a:hover { color: white; }
.footer-note { font-size: 12px; line-height: 1.7; margin-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; }

/* DIVIDER */
hr.divider { border: none; border-top: 1px solid var(--gray-100); margin: 36px 0; }

/* CHECK / CROSS LIST */
.check-list, .cross-list { list-style: none; display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.check-list li, .cross-list li { font-size: 14px; color: var(--gray-700); padding-left: 24px; position: relative; line-height: 1.6; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--green-500); font-weight: 700; }
.cross-list li::before { content: '✕'; position: absolute; left: 0; color: var(--red-500); font-weight: 700; }

/* RESPONSIVE */
@media (max-width: 640px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0; background: white; border-bottom: 1px solid var(--gray-100); padding: 12px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { padding: 48px 20px 40px; }
  .container { padding: 0 16px; }
  .card-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 20px; }
}