:root {
  color-scheme: light dark;
  --bg: #f4f7f3;
  --surface: #ffffff;
  --surface-soft: #e6efe9;
  --text: #17322a;
  --muted: #50665e;
  --line: #c9d8cf;
  --accent: #176b4d;
  --accent-dark: #0d5038;
  --accent-text: #f7fbf8;
  --radius: 16px;
  --shadow: 0 24px 70px rgba(25, 80, 59, 0.13);
  --max: 1240px;
}

* { 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;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

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

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 12px 18px;
  border-radius: 8px;
  background: var(--text);
  color: var(--surface);
}

.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(calc(100% - 48px), var(--max));
  height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand { text-decoration: none; line-height: 1.15; }
.brand-kicker { display: block; font-size: 0.68rem; color: var(--muted); }
.brand-name { display: block; margin-top: 5px; font-size: 1.35rem; font-weight: 800; letter-spacing: 0.16em; }

.site-nav { display: flex; align-items: center; gap: 30px; font-size: 0.88rem; font-weight: 700; }
.site-nav a { text-decoration: none; }
.site-nav a:not(.nav-contact) { padding: 10px 0; border-bottom: 2px solid transparent; }
.site-nav a:not(.nav-contact):hover,
.site-nav a:not(.nav-contact):focus-visible { border-color: var(--accent); }

.nav-contact,
.primary-button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border: 2px solid var(--accent);
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 800;
  line-height: 1.25;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.nav-contact:hover,
.primary-button:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); }
.nav-contact:active,
.primary-button:active { transform: translateY(1px); }

.menu-button { display: none; }

.hero {
  width: min(calc(100% - 48px), var(--max));
  min-height: calc(100dvh - 76px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: 7vw;
  padding: 56px 0 72px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.6rem, 4.1vw, 3.35rem);
  line-height: 1.18;
  letter-spacing: -0.045em;
}

.hero h1 span { display: block; white-space: nowrap; }

.hero-lead {
  max-width: 31rem;
  margin: 26px 0 34px;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.hero-visual {
  position: relative;
  align-self: stretch;
  min-height: 580px;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface-soft);
  box-shadow: var(--shadow);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9, 47, 34, 0.45), transparent 44%);
  pointer-events: none;
}

.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

.hero-message {
  position: absolute;
  z-index: 1;
  right: 24px;
  bottom: 24px;
  left: 24px;
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 12px;
  background: rgba(10, 60, 41, 0.82);
  color: #f7fbf8;
  backdrop-filter: blur(12px);
}

.hero-message span { display: block; margin-bottom: 5px; font-size: 0.67rem; font-weight: 800; letter-spacing: 0.16em; }
.hero-message a { font-size: clamp(0.9rem, 1.5vw, 1.1rem); font-weight: 800; overflow-wrap: anywhere; }

.contact-band {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px 32px;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-text);
}

.contact-band p { margin: 0; font-size: 0.82rem; }
.contact-band a { display: block; margin-top: 3px; font-size: clamp(1.25rem, 3vw, 2rem); font-weight: 900; line-height: 1.35; overflow-wrap: anywhere; }
.copy-button {
  padding: 12px 16px;
  border: 1px solid rgba(255,255,255,0.62);
  border-radius: 10px;
  background: transparent;
  color: #f7fbf8;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
}
.copy-button:hover, .copy-button:focus-visible { background: rgba(255,255,255,0.12); }
.copy-button:active { transform: translateY(1px); }
.copy-status { grid-column: 1 / -1; min-height: 0; }

.section { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 112px 0; }

.intro { display: block; }
.intro-content { max-width: 780px; margin-left: min(24vw, 300px); }
.intro h2, .section-heading h2, .fields h2, .profile h2, .final-contact h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.75rem);
  line-height: 1.3;
  letter-spacing: -0.035em;
}
.intro-content p { margin: 28px 0 0; color: var(--muted); font-size: 1.05rem; }

.activities { padding-top: 40px; }
.section-heading { max-width: 720px; margin-bottom: 46px; }
.section-heading p { max-width: 40rem; margin: 20px 0 0; color: var(--muted); }

.activity-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: 300px 260px;
  gap: 18px;
}

.activity {
  position: relative;
  overflow: hidden;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.activity-main { grid-row: span 2; display: flex; flex-direction: column; justify-content: flex-end; padding: clamp(34px, 5vw, 68px); background: var(--surface-soft); }
.activity-photo { padding: 0; }
.activity-photo img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.72); }
.activity-accent { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.activity h3 { max-width: 13em; margin: 0 0 15px; font-size: clamp(1.4rem, 2.3vw, 2.45rem); line-height: 1.35; }
.activity p { max-width: 38rem; margin: 0; color: var(--muted); }
.activity-accent p { color: rgba(247, 251, 248, 0.82); }

.fields { display: grid; grid-template-columns: 0.65fr 1.35fr; gap: 6vw; align-items: start; }
.field-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field-list span { min-height: 76px; display: flex; align-items: center; padding: 18px 22px; border-left: 4px solid var(--accent); background: var(--surface); font-weight: 800; }

.profile {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  column-gap: 7vw;
  row-gap: 24px;
  border-top: 1px solid var(--line);
}
.profile-title-block { grid-row: span 3; }
.profile-title-block > p:last-child { max-width: 28rem; color: var(--muted); }
.profile-list { margin: 0; }
.profile-list div { display: grid; grid-template-columns: 160px 1fr; gap: 22px; padding: 21px 0; border-bottom: 1px solid var(--line); }
.profile-list dt { color: var(--muted); font-size: 0.82rem; font-weight: 700; }
.profile-list dd { margin: 0; font-weight: 700; }
.profile-note { grid-column: 2; margin: 0; color: var(--muted); font-size: 0.78rem; }
.text-link { grid-column: 2; width: fit-content; color: var(--accent); font-weight: 800; text-underline-offset: 5px; }

.final-contact {
  margin-bottom: 72px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 6vw;
  align-items: center;
  padding-right: clamp(28px, 5vw, 72px);
  padding-left: clamp(28px, 5vw, 72px);
  border-radius: var(--radius);
  background: var(--surface-soft);
}
.final-contact-copy p { max-width: 34rem; margin: 22px 0 0; color: var(--muted); }
.email-panel { padding: 34px; border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); }
.email-panel > span { display: block; color: var(--muted); font-size: 0.76rem; font-weight: 800; }
.email-panel > a:not(.primary-button) { display: block; margin: 10px 0 28px; color: var(--accent); font-size: clamp(1.1rem, 2.4vw, 1.8rem); font-weight: 900; overflow-wrap: anywhere; }

.site-footer {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.3fr auto;
  gap: 36px;
  align-items: end;
  padding: 52px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.76rem;
}
.footer-brand span, .footer-contact span { display: block; }
.footer-brand strong { display: block; color: var(--text); font-size: 1.25rem; letter-spacing: 0.12em; }
.footer-contact a { color: var(--accent); font-size: 1rem; font-weight: 800; overflow-wrap: anywhere; }
.site-footer p { margin: 0; white-space: nowrap; }
.mobile-contact { display: none; }

:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 70%, white); outline-offset: 4px; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101814;
    --surface: #17221d;
    --surface-soft: #1c2c24;
    --text: #e7f0ea;
    --muted: #afc1b7;
    --line: #34483e;
    --accent: #63bd91;
    --accent-dark: #48a578;
    --accent-text: #0d241a;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  }
  .hero-visual img, .activity-photo img { filter: brightness(0.82) saturate(0.72); }
  .activity-photo img { filter: brightness(0.72) saturate(0.65); }
  .hero-message { background: rgba(8, 38, 27, 0.86); color: #edf7f1; }
  .copy-button { color: #0d241a; border-color: rgba(13,36,26,0.55); }
}

@media (max-width: 900px) {
  .header-inner { width: min(calc(100% - 32px), var(--max)); height: 68px; }
  .menu-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 9px 0;
    border: 0;
    background: transparent;
    color: var(--text);
    font: inherit;
    font-size: 0.8rem;
    font-weight: 800;
  }
  .menu-lines { display: grid; gap: 5px; width: 22px; }
  .menu-lines i { display: block; height: 2px; background: currentColor; transition: transform 180ms ease; }
  .menu-button[aria-expanded="true"] .menu-lines i:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] .menu-lines i:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .site-nav {
    position: absolute;
    top: 68px;
    right: 0;
    left: 0;
    display: none;
    padding: 18px 16px 24px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
  }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 12px 8px; }
  .nav-contact { margin-top: 8px; }
  .hero { width: min(calc(100% - 32px), var(--max)); min-height: auto; grid-template-columns: 1fr; gap: 42px; padding: 54px 0; }
  .hero-visual { min-height: 520px; }
  .section, .contact-band, .site-footer { width: min(calc(100% - 32px), var(--max)); }
  .intro, .fields, .profile, .final-contact { grid-template-columns: 1fr; }
  .intro-content { margin-left: 0; }
  .activity-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .activity { min-height: 250px; }
  .activity-main { grid-row: auto; min-height: 420px; }
  .activity-photo { min-height: 320px; }
  .profile-title-block { grid-row: auto; }
  .profile-note, .text-link { grid-column: 1; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .site-footer p { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  body { padding-bottom: 66px; }
  .brand-kicker { font-size: 0.6rem; }
  .brand-name { font-size: 1.08rem; }
  .menu-button-label { display: none; }
  .hero h1 { font-size: clamp(1.75rem, 9.5vw, 3.1rem); }
  .hero-visual { min-height: 420px; }
  .hero-message { right: 14px; bottom: 14px; left: 14px; padding: 16px; }
  .contact-band { grid-template-columns: 1fr; padding: 24px; }
  .copy-button { width: 100%; }
  .section { padding: 78px 0; }
  .activity { padding: 26px; }
  .field-list { grid-template-columns: 1fr; }
  .profile-list div { grid-template-columns: 1fr; gap: 4px; }
  .final-contact { margin-bottom: 42px; padding: 54px 24px; }
  .email-panel { padding: 24px; }
  .site-footer { grid-template-columns: 1fr; gap: 24px; padding-bottom: 34px; }
  .site-footer p { grid-column: 1; }
  .mobile-contact {
    position: fixed;
    z-index: 30;
    right: 0;
    bottom: 0;
    left: 0;
    display: block;
    padding: 9px 12px calc(9px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--bg) 94%, transparent);
    backdrop-filter: blur(14px);
  }
  .mobile-contact a {
    display: flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: var(--accent);
    color: var(--accent-text);
    font-weight: 900;
    text-decoration: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}