:root {
  color-scheme: light dark;
  --bg: #f4f7f1;
  --bg-soft: #e8efe4;
  --surface: #fbfcf9;
  --surface-strong: #dce8d6;
  --text: #17231d;
  --muted: #53625a;
  --line: #c8d3c7;
  --accent: #246648;
  --accent-hover: #194b35;
  --accent-ink: #f7fbf8;
  --shadow: 0 24px 60px rgba(39, 75, 55, 0.13);
  --radius: 16px;
  --max: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121a16;
    --bg-soft: #19251f;
    --surface: #1c2822;
    --surface-strong: #25372d;
    --text: #edf4ef;
    --muted: #b7c6bd;
    --line: #34473c;
    --accent: #73b58c;
    --accent-hover: #91c8a4;
    --accent-ink: #102118;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 8px;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(16px);
}
.header-inner {
  width: min(calc(100% - 40px), var(--max));
  height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-mark {
  width: 39px;
  height: 47px;
  position: relative;
  flex: 0 0 auto;
  border: 2px solid var(--accent);
  border-radius: 52% 48% 48% 52% / 58% 58% 42% 42%;
  transform: rotate(8deg);
}
.brand-mark span {
  position: absolute;
  width: 12px;
  height: 9px;
  left: 12px;
  top: 17px;
  background: var(--accent);
  border-radius: 50% 50% 45% 45%;
  transform: rotate(-8deg);
}
.brand-copy { display: grid; line-height: 1.25; }
.brand-copy strong, .footer-brand strong { font-size: 19px; letter-spacing: .08em; }
.brand-copy small, .footer-brand small { color: var(--muted); font-size: 11px; }

.primary-nav { display: flex; align-items: center; gap: 26px; }
.primary-nav a {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.primary-nav a:not(.nav-contact):hover { color: var(--accent); }
.nav-contact, .button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .2s ease, background-color .2s ease, color .2s ease;
}
.nav-contact, .button-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.nav-contact:hover, .button-primary:hover { background: var(--accent-hover); }
.nav-contact:active, .button:active, .copy-button:active { transform: translateY(1px); }
.menu-button { display: none; }

.hero {
  min-height: calc(100dvh - 72px);
  display: grid;
  align-items: center;
  overflow: hidden;
}
.hero-inner {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: 54px 0 64px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  align-items: center;
  gap: clamp(44px, 8vw, 112px);
}
.eyebrow {
  margin: 0 0 22px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 {
  margin: 0;
  font-size: clamp(42px, 5.3vw, 72px);
  line-height: 1.2;
  letter-spacing: -.045em;
  font-weight: 760;
}
.hero-lead {
  max-width: 30em;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.9;
}
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.text-link {
  color: var(--accent);
  font-weight: 800;
  text-underline-offset: 5px;
  text-decoration-thickness: 1px;
}
.text-link:hover { text-decoration-thickness: 2px; }

.hero-visual { position: relative; min-width: 0; }
.photo-frame {
  aspect-ratio: 4 / 5;
  max-height: 650px;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--surface-strong);
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }
.egg-line {
  position: absolute;
  width: 36%;
  aspect-ratio: .82;
  right: -7%;
  bottom: -6%;
  border: 2px solid var(--accent);
  border-radius: 52% 48% 48% 52% / 58% 58% 42% 42%;
  transform: rotate(18deg);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
}
.egg-line span {
  position: absolute;
  width: 24%;
  aspect-ratio: 1.1;
  top: 39%;
  left: 38%;
  border-radius: 50%;
  background: var(--accent);
}

.contact-strip { background: var(--accent); color: var(--accent-ink); padding: 20px; }
.contact-strip-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.contact-strip-inner > div { display: flex; align-items: baseline; gap: clamp(18px, 4vw, 58px); }
.contact-label { font-size: 13px; font-weight: 800; }
.contact-email { font-size: clamp(22px, 3vw, 38px); font-weight: 800; line-height: 1.25; text-underline-offset: 5px; }
.copy-button {
  border: 1px solid color-mix(in srgb, var(--accent-ink) 50%, transparent);
  background: transparent;
  color: inherit;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}
.copy-button:hover { background: color-mix(in srgb, var(--accent-ink) 12%, transparent); }
.copy-status { width: min(100%, var(--max)); margin: 4px auto 0; min-height: 1.5em; font-size: 12px; }

.section { padding: clamp(78px, 10vw, 132px) 0; }
.section-inner { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.mission-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(50px, 10vw, 150px); }
h2 { margin: 0; font-size: clamp(34px, 4.4vw, 58px); line-height: 1.35; letter-spacing: -.035em; }
.mission-body .lead { margin-top: 0; color: var(--text); font-size: clamp(21px, 2.2vw, 29px); line-height: 1.65; font-weight: 700; }
.mission-body > p:not(.lead) { color: var(--muted); max-width: 42em; }
.facts-inline {
  margin: 46px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.facts-inline div { border-top: 1px solid var(--line); padding-top: 14px; }
.facts-inline dt { color: var(--muted); font-size: 12px; }
.facts-inline dd { margin: 2px 0 0; font-weight: 800; }

.activities { background: var(--bg-soft); }
.section-heading { max-width: 720px; margin-bottom: 50px; }
.section-heading p, .organization-heading p, .contact-card > div > p { color: var(--muted); max-width: 42em; }
.activity-grid {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  grid-template-areas:
    "feature learn"
    "feature talk"
    "listen train";
  gap: 18px;
}
.activity-grid article { border-radius: var(--radius); overflow: hidden; }
.activity-feature { grid-area: feature; background: var(--surface); box-shadow: var(--shadow); }
.activity-photo { aspect-ratio: 16 / 10; overflow: hidden; }
.activity-photo img { width: 100%; height: 100%; object-fit: cover; }
.activity-feature-copy, .activity-item { padding: clamp(25px, 4vw, 44px); }
.activity-feature-copy h3, .activity-item h3 { margin: 8px 0 10px; font-size: clamp(22px, 2.1vw, 31px); line-height: 1.5; }
.activity-feature-copy p, .activity-item p { color: var(--muted); margin: 0; }
.activity-index { color: var(--accent); font-size: 13px; font-weight: 800; }
.activity-item { background: var(--surface); min-height: 220px; }
.activity-item.tinted { grid-area: learn; background: var(--surface-strong); }
.activity-item:nth-of-type(3) { grid-area: talk; }
.activity-item.image-backed { grid-area: listen; position: relative; color: #f3f7f4; min-height: 300px; }
.activity-item.image-backed img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.activity-item.image-backed::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(10, 24, 17, .88), rgba(10, 24, 17, .12)); }
.activity-item.image-backed div { position: relative; z-index: 1; display: flex; height: 100%; flex-direction: column; justify-content: flex-end; }
.activity-item.image-backed p { color: #dce9e0; }
.activity-item.image-backed .activity-index { color: #b9dec6; }
.activity-item.outlined { grid-area: train; border: 1px solid var(--line); background: transparent; }

.message { padding-top: 70px; padding-bottom: 70px; }
.message-inner { border-left: 4px solid var(--accent); padding: clamp(20px, 4vw, 50px); }
.message-kicker { margin: 0 0 18px; color: var(--accent); font-weight: 800; }
blockquote { margin: 0; }
blockquote p { margin: 0; max-width: 28em; font-size: clamp(25px, 3vw, 42px); line-height: 1.55; font-weight: 700; letter-spacing: -.02em; }
blockquote footer { margin-top: 20px; color: var(--muted); font-weight: 700; }

.organization { background: var(--surface); }
.organization-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(45px, 9vw, 120px); align-items: start; }
.organization-heading { position: sticky; top: 110px; }
.organization-heading .text-link { display: inline-block; margin-top: 18px; }
.organization-list { margin: 0; }
.organization-list div { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.organization-list div:first-child { border-top: 1px solid var(--line); }
.organization-list dt { color: var(--muted); font-size: 14px; }
.organization-list dd { margin: 0; font-weight: 700; }

.contact-section { padding-bottom: clamp(100px, 12vw, 160px); }
.contact-card {
  padding: clamp(36px, 6vw, 76px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(35px, 8vw, 100px);
  background: var(--surface-strong);
  border-radius: var(--radius);
}
.contact-main { align-self: center; }
.large-email { display: block; margin-bottom: 25px; color: var(--accent); font-size: clamp(23px, 3vw, 39px); line-height: 1.35; font-weight: 850; text-underline-offset: 7px; }
.contact-note { margin: 23px 0 0; color: var(--muted); font-size: 13px; }

.site-footer { padding: 58px 0 110px; border-top: 1px solid var(--line); }
.footer-inner {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: .8fr 1.2fr .8fr;
  gap: 50px;
}
.footer-brand > div { display: grid; line-height: 1.3; }
.footer-contact a { color: var(--accent); font-size: 21px; font-weight: 800; }
.footer-contact p, .footer-meta p { color: var(--muted); font-size: 13px; line-height: 1.7; }
.footer-meta { text-align: right; }
.footer-meta a { font-size: 13px; }

.floating-email {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 15;
  display: none;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 999px;
  box-shadow: var(--shadow);
  text-decoration: none;
  line-height: 1.25;
}
.floating-email span { font-size: 11px; }
.floating-email strong { display: block; font-size: 13px; }

.reveal { opacity: 1; transform: none; }

@media (max-width: 920px) {
  .menu-button {
    display: inline-flex;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
  }
  .primary-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    padding: 22px 20px 26px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a:not(.nav-contact) { padding: 6px 0; }
  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; padding-top: 52px; }
  .hero-copy { max-width: 720px; }
  .hero-visual { max-width: 600px; }
  .photo-frame { aspect-ratio: 16 / 10; }
  .mission-grid, .organization-grid, .contact-card { grid-template-columns: 1fr; }
  .organization-heading { position: static; }
  .activity-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "feature feature"
      "learn talk"
      "listen train";
  }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-meta { text-align: left; }
  .floating-email { display: block; }
}

@media (max-width: 640px) {
  .header-inner, .hero-inner, .section-inner, .footer-inner { width: min(calc(100% - 32px), var(--max)); }
  .brand-copy strong { font-size: 17px; }
  .brand-mark { width: 34px; height: 41px; }
  h1 { font-size: clamp(37px, 11vw, 52px); }
  .hero-inner { padding: 42px 0 56px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .contact-strip { padding: 22px 16px; }
  .contact-strip-inner, .contact-strip-inner > div { align-items: flex-start; flex-direction: column; gap: 10px; }
  .contact-email { font-size: clamp(21px, 7vw, 29px); }
  .copy-button { width: 100%; }
  .facts-inline { grid-template-columns: 1fr; }
  .activity-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "feature" "learn" "talk" "listen" "train";
  }
  .activity-item { min-height: auto; }
  .activity-item.image-backed { min-height: 330px; }
  .organization-list div { grid-template-columns: 1fr; gap: 4px; }
  .organization-list dt { font-size: 12px; }
  .contact-card { padding: 32px 22px; }
  .large-email { font-size: clamp(20px, 6.4vw, 28px); }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .site-footer { padding-bottom: 126px; }
  .floating-email { left: 16px; right: 16px; bottom: 14px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

@media print {
  .site-header, .floating-email, .copy-button { display: none !important; }
  body { background: #fff; color: #111; }
  .section { padding: 40px 0; }
}