@charset "UTF-8";
:root {
  --green: #315b43;
  --deep: #203e30;
  --leaf: #78996b;
  --pale: #edf2e9;
  --cream: #f8f8f3;
  --text: #344239;
  --muted: #68766d;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(1100px, calc(100% - 56px)); margin-inline: auto; }
.header { background: #fff; border-bottom: 1px solid #edf0eb; }
.header-inner {
  width: min(1180px, calc(100% - 48px)); min-height: 82px; margin: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
}
.logo { display: inline-flex; align-items: center; gap: 11px; }
.logo-symbol {
  display: grid; place-items: center; width: 42px; height: 42px;
  border-radius: 50%; background: var(--green); color: white;
  font-size: 21px; font-weight: 700;
}
.logo-text { color: var(--deep); font-size: 14px; font-weight: 700; line-height: 1.35; }
.logo-text small {
  display: block; margin-top: 5px; color: #8a988d;
  font: 9px Arial, sans-serif; letter-spacing: 1.25px;
}
.nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 32px); }
.nav a { color: #526157; font-size: 12px; font-weight: 600; }
.nav a:hover, .text-link:hover { color: var(--leaf); }
.hero { position: relative; min-height: 570px; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-image {
  position: absolute; inset: 0;
  background: url("https://images.unsplash.com/photo-1448375240586-882707db888b?auto=format&fit=crop&w=2000&q=85") center 50%/cover no-repeat;
  transform: scale(1.01);
}
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(18,48,34,.82), rgba(25,58,40,.54) 53%, rgba(20,48,34,.10)); }
.hero-content { position: relative; z-index: 1; padding-block: 85px; }
.eyebrow { margin: 0 0 20px; font: 700 10px Arial, sans-serif; letter-spacing: 2.8px; }
.hero .eyebrow { color: #d5e3ce; }
.hero h1 { margin: 0 0 20px; font-size: clamp(42px, 6vw, 72px); line-height: 1.35; letter-spacing: .06em; }
.hero h1 span { color: #dce8bd; }
.hero-copy { margin: 0 0 30px; font-size: 14px; line-height: 2.1; letter-spacing: .08em; }
.button {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 35px;
  min-width: 205px; padding: 12px 20px; font-size: 12px; font-weight: 700;
  transition: transform .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button b { font-size: 18px; }
.button-white { color: var(--green); background: white; }
.button-green { color: white; background: var(--green); }
.hero-caption { position: absolute; right: 28px; bottom: 22px; font: 10px Arial; letter-spacing: 3px; color: #e5ece2; }
.section { padding-block: 94px; }
.about { display: grid; grid-template-columns: .9fr 1.1fr; gap: 9%; align-items: start; }
.green { color: var(--leaf); }
h2 { color: var(--deep); font-size: clamp(28px, 3.6vw, 42px); line-height: 1.55; letter-spacing: .04em; margin: 0; }
.about .section-title h2 { margin-top: 12px; }
.about-text { padding-top: 20px; color: #59675e; font-size: 13px; }
.about-text p { margin: 0 0 18px; }
.naturegame { background: var(--cream); padding-block: 75px; }
.naturegame-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 7%; align-items: center; }
.naturegame-photo {
  min-height: 360px;
  background: url("https://images.unsplash.com/photo-1473448912268-2022ce9509d8?auto=format&fit=crop&w=1100&q=85") center/cover no-repeat;
}
.naturegame-copy h2 { margin: 0 0 18px; }
.naturegame-copy > p:not(.eyebrow) { color: var(--muted); font-size: 13px; }
.text-link { display: inline-flex; gap: 18px; margin-top: 10px; padding-bottom: 5px; border-bottom: 1px solid #b8c8b2; color: var(--green); font-size: 12px; font-weight: 700; }
.center-heading { text-align: center; }
.center-heading h2 { margin-bottom: 10px; }
.center-heading > p:last-child { color: var(--muted); font-size: 13px; }
.activity-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 42px; }
.activity { padding: 30px 27px; border-top: 3px solid var(--leaf); background: #fff; box-shadow: 0 8px 26px rgba(31,65,43,.06); }
.activity:nth-child(2) { border-color: #c5a96a; }
.activity:nth-child(3) { border-color: #86a5a1; }
.activity-icon { display: block; color: var(--leaf); font-size: 34px; line-height: 1.3; margin-bottom: 14px; }
.activity:nth-child(2) .activity-icon { color: #c5a96a; }
.activity:nth-child(3) .activity-icon { color: #86a5a1; }
.activity h3 { color: var(--deep); margin: 0 0 8px; font-size: 17px; }
.activity p { color: var(--muted); font-size: 12px; margin: 0; }
.message { padding: 62px 0; text-align: center; color: white; background: linear-gradient(110deg, #254a38, #52704f); }
.message-inner p { margin: 0; font-size: clamp(19px, 2.7vw, 29px); letter-spacing: .06em; }
.message-inner span { display: block; margin-top: 16px; color: #d1dfce; font: 10px Arial; letter-spacing: 3px; }
.contact { text-align: center; padding-block: 88px 96px; }
.contact h2 { margin-bottom: 15px; }
.contact > p:not(.eyebrow) { color: var(--muted); font-size: 13px; margin: 0 auto 25px; }
.footer { color: white; background: #1d3b2d; padding-top: 30px; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 25px; }
.footer-logo .logo-symbol { background: #dce8c8; color: var(--green); }
.footer-logo .logo-text { color: white; }
.footer-logo .logo-text small { color: #b2c2b4; }
.footer-top > p { color: #c8d5c7; font-size: 12px; letter-spacing: .08em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 14px; border-top: 1px solid rgba(255,255,255,.16); color: #b5c4b8; font: 10px Arial; }
.footer-bottom a { color: #e1e9d8; }
@media (max-width: 760px) {
  .wrap { width: calc(100% - 40px); }
  .header-inner { width: calc(100% - 36px); padding-block: 13px; align-items: flex-start; flex-direction: column; gap: 12px; }
  .logo-text { font-size: 12px; }
  .nav { width: 100%; justify-content: space-between; gap: 12px; overflow-x: auto; padding-bottom: 2px; }
  .nav a { white-space: nowrap; font-size: 10px; }
  .hero { min-height: 510px; }
  .hero-content { padding-block: 75px; }
  .hero h1 { font-size: clamp(39px, 10vw, 58px); }
  .hero-copy { font-size: 12px; }
  .section { padding-block: 66px; }
  .about, .naturegame-inner { grid-template-columns: 1fr; gap: 22px; }
  .about-text { padding-top: 0; }
  .naturegame { padding-block: 50px; }
  .naturegame-photo { min-height: 235px; }
  .activity-list { grid-template-columns: 1fr; gap: 13px; margin-top: 30px; }
  .activity { padding: 24px; }
  .contact { padding-block: 68px; }
  .footer-top { align-items: flex-start; flex-direction: column; }
  .footer-top > p { margin: 0; }
  .footer-bottom { font-size: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

/* 協会ロゴ */
.logo-image { display:block; width:112px; height:48px; object-fit:contain; object-position:left center; flex:0 0 auto; }
.footer-logo .logo-image { width:112px; }
@media (max-width:760px) { .logo-image { width:96px; height:42px; } }