:root {
  --color-matcha: #2d4a3e;
  --color-matcha-mid: #3d6b52;
  --color-matcha-light: #5a8f6e;
  --color-cream: #f7f4ef;
  --color-paper: #fdfcfa;
  --color-ink: #1a1f1c;
  --color-ink-muted: #4a534d;
  --color-stone: #e8e4dc;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic UI", sans-serif;
  --font-serif: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --space-section: clamp(4rem, 10vw, 7rem);
  --radius: 12px;
  --shadow-soft: 0 24px 48px rgba(45, 74, 62, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-paper);
}

a {
  color: var(--color-matcha-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-matcha);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 252, 250, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-stone);
}

.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  position: relative;
}

.logo {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(0.875rem, 3.2vw, 1.05rem);
  letter-spacing: 0.06em;
  color: var(--color-matcha);
  text-decoration: none;
  min-width: 0;
  flex: 1 1 auto;
  line-height: 1.25;
}

@media (min-width: 768px) {
  .logo {
    flex: 0 1 auto;
    font-size: 1.05rem;
  }
}

.logo:hover {
  color: var(--color-matcha-mid);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: 8px;
  color: var(--color-matcha);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-matcha-light);
  outline-offset: 2px;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header--nav-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header--nav-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-header--nav-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle__bar {
    transition: none;
  }
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
}

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .logo {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 0.25rem;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 0;
    padding: 0.5rem 1.25rem 1.25rem;
    margin: 0;
    background: rgba(253, 252, 250, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-stone);
    box-shadow: 0 12px 24px rgba(45, 74, 62, 0.06);
  }

  .site-header--nav-open .nav {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-stone);
    font-size: 0.9375rem;
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .nav .nav__cta {
    margin-top: 0.5rem;
    padding: 0.65rem 1rem;
    text-align: center;
    border-radius: 999px;
    border-bottom: 0;
  }
}

body.nav-open {
  overflow: hidden;
}

.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--color-matcha);
}

.nav__cta {
  padding: 0.5rem 1rem;
  background: var(--color-matcha);
  color: var(--color-paper) !important;
  border-radius: 999px;
  text-decoration: none !important;
}

.nav__cta:hover {
  background: var(--color-matcha-mid);
  color: var(--color-paper) !important;
}

.hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: flex;
  align-items: center;
  padding: var(--space-section) 1.5rem;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
      145deg,
      var(--color-cream) 0%,
      #e8efe8 45%,
      var(--color-paper) 100%
    );
  pointer-events: none;
}

.hero__bg::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: min(55vw, 480px);
  height: min(55vw, 480px);
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(90, 143, 110, 0.18) 0%,
    transparent 70%
  );
}

.hero__bg::after {
  content: "";
  position: absolute;
  bottom: 10%;
  left: 5%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(45, 74, 62, 0.12) 0%,
    transparent 70%
  );
}

.hero__content {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.hero__label {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-matcha-light);
}

.hero__title {
  margin: 0 0 1.5rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.85rem, 5vw, 2.75rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--color-matcha);
}

.hero__title-line {
  display: block;
}

.hero__lead {
  margin: 0 0 2rem;
  font-size: 1.05rem;
  color: var(--color-ink-muted);
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 999px;
  text-decoration: none !important;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--color-matcha);
  color: var(--color-paper);
}

.btn--primary:hover {
  background: var(--color-matcha-mid);
  color: var(--color-paper);
}

.btn--ghost {
  background: transparent;
  color: var(--color-matcha);
  border-color: var(--color-stone);
}

.btn--ghost:hover {
  border-color: var(--color-matcha-light);
  color: var(--color-matcha);
}

.btn--large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--space-section) 0;
}

.section__heading {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 600;
  color: var(--color-matcha);
  text-align: center;
}

.section__sub {
  margin: 0 0 2.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-matcha-light);
  text-align: center;
}

.about {
  background: var(--color-paper);
}

.about__grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .about__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.about__card {
  padding: 1.75rem;
  background: var(--color-cream);
  border-radius: var(--radius);
  border: 1px solid var(--color-stone);
  box-shadow: var(--shadow-soft);
}

.about__card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-matcha);
}

.about__card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
}

.group {
  background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-paper) 100%);
}

.group__panel {
  padding: clamp(2rem, 5vw, 3rem);
  background: var(--color-paper);
  border: 1px solid var(--color-stone);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow-soft);
}

.group__tagline {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-matcha);
}

.group__name {
  margin: 0 0 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink);
}

.group__body p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
}

.group__body p:last-child {
  margin-bottom: 0;
}

.group__link {
  display: inline-block;
  margin-top: 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.contact {
  text-align: center;
}

.contact__inner {
  max-width: 520px;
}

.contact__lead {
  margin: 0 0 1.75rem;
  color: var(--color-ink-muted);
  font-size: 0.9375rem;
}

.contact__note {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

.site-footer {
  padding: 2.5rem 1.5rem;
  background: var(--color-matcha);
  color: rgba(255, 255, 255, 0.88);
}

.site-footer a {
  color: #c5e0cc;
  text-decoration: underline;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.site-footer__brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.site-footer__legal {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  opacity: 0.95;
}

.site-footer__copy {
  margin: 0;
  font-size: 0.75rem;
  opacity: 0.65;
}