:root {
  --bg-top: #d9ead4;
  --bg-mid: #c5dab8;
  --bg-bottom: #b8d1b0;
  --ink-main: #112a22;
  --ink-soft: #3a5e4a;
  --card: rgba(250, 253, 247, 0.82);
  --line: rgba(17, 42, 34, 0.15);
  --accent: #27785f;
  --accent-hover: #1e624e;
  --shadow: 0 20px 46px rgba(12, 44, 34, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  position: relative;
  overflow-x: hidden;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--ink-main);
  background:
    radial-gradient(110rem 56rem at 62% -8%, rgba(210, 234, 170, 0.32), transparent 55%),
    radial-gradient(80rem 44rem at 14% 22%, rgba(148, 186, 122, 0.22), transparent 60%),
    linear-gradient(178deg, var(--bg-top) 0%, var(--bg-mid) 48%, var(--bg-bottom) 100%);
  line-height: 1.7;
}

.bg-gradient-mist,
.bg-canopy,
.bg-water-ripples,
.bg-orb {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

/* Warm dappled light patches filtering through a canopy */
.bg-gradient-mist {
  background:
    radial-gradient(22rem 16rem at 38% 28%, rgba(240, 248, 192, 0.38), transparent 70%),
    radial-gradient(18rem 12rem at 68% 14%, rgba(228, 244, 178, 0.32), transparent 68%),
    radial-gradient(28rem 18rem at 11% 44%, rgba(185, 220, 148, 0.3), transparent 72%),
    radial-gradient(14rem 10rem at 82% 52%, rgba(220, 238, 170, 0.26), transparent 68%),
    radial-gradient(38rem 18rem at 54% 88%, rgba(120, 164, 110, 0.22), transparent 72%);
  filter: blur(0);
}

/* Deep leaf-shadow clusters along the top edge */
.bg-canopy {
  background:
    radial-gradient(circle at 4%  8%,  rgba(46, 88, 54, 0.44) 0 7%,   transparent 15%),
    radial-gradient(circle at 14% 4%,  rgba(52, 96, 60, 0.38) 0 6%,   transparent 14%),
    radial-gradient(circle at 26% 11%, rgba(60, 108, 68, 0.34) 0 7.5%, transparent 16%),
    radial-gradient(circle at 40% 5%,  rgba(54, 100, 62, 0.30) 0 6.5%, transparent 15%),
    radial-gradient(circle at 56% 9%,  rgba(48, 92, 56, 0.36) 0 7%,   transparent 15%),
    radial-gradient(circle at 70% 4%,  rgba(44, 86, 52, 0.40) 0 6.5%, transparent 14%),
    radial-gradient(circle at 82% 12%, rgba(58, 104, 66, 0.32) 0 7%,   transparent 16%),
    radial-gradient(circle at 94% 6%,  rgba(50, 94, 58, 0.38) 0 6%,   transparent 14%),
    radial-gradient(circle at 9%  20%, rgba(40, 80, 48, 0.28) 0 5.5%, transparent 13%),
    radial-gradient(circle at 62% 18%, rgba(44, 84, 52, 0.26) 0 5%,   transparent 12%);
  filter: blur(3px);
  opacity: 0.80;
}

/* Barely visible water hint at the very bottom */
.bg-water-ripples {
  inset: auto 0 0 0;
  height: 18vh;
  background:
    radial-gradient(90% 70% at 50% 100%, rgba(98, 148, 174, 0.10), transparent 68%);
  opacity: 0.28;
  animation: rippleDrift 26s ease-in-out infinite;
}

.container {
  width: min(1040px, calc(100% - 2.4rem));
  margin: 0 auto;
}

.bg-orb {
  z-index: -1;
  width: 34rem;
  height: 34rem;
  inset: auto;
  border-radius: 999px;
  filter: blur(10px);
  opacity: 0.52;
  animation: orbFloat 18s ease-in-out infinite;
}

/* Warm-green light glow through the canopy */
.bg-orb-a {
  top: -8rem;
  right: -6rem;
  background: radial-gradient(circle, rgba(168, 210, 138, 0.38), transparent 68%);
}

/* Cool shadow pool at the base */
.bg-orb-b {
  bottom: -12rem;
  left: -6rem;
  background: radial-gradient(circle, rgba(80, 126, 100, 0.28), transparent 68%);
  animation-delay: 6.4s;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(7px);
  background: rgba(238, 246, 242, 0.74);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 0.9rem;
}

.brand {
  text-decoration: none;
  color: var(--ink-main);
  font-family: "Cormorant Garamond", serif;
  font-size: 1.7rem;
  letter-spacing: 0.03em;
}

.nav {
  display: flex;
  gap: 1rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.98rem;
  padding: 0.25rem 0.4rem;
  border-radius: 7px;
  transition: background-color 180ms ease, color 180ms ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink-main);
  background: rgba(255, 255, 255, 0.72);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.language-switcher-label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.language-switcher select {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink-main);
  padding: 0.35rem 0.65rem;
}

.hero {
  padding: 5.4rem 0 4rem;
}

.hero-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 2.2rem;
  background: var(--card);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  animation: rise 620ms ease-out;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid rgba(47, 124, 103, 0.25);
  border-radius: 999px;
  padding: 0.24rem 0.7rem;
}

h1,
h2 {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 4rem);
  margin-top: 0.8rem;
}

.hero p {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  max-width: 42rem;
}

.section {
  margin-top: 1.8rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(3px);
  padding: 1.5rem;
}

.policy-panel {
  padding: 1.2rem;
}

.policy-panel > h2 {
  margin-top: 0;
}

.app-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.2rem;
  align-items: center;
}

.app-icon {
  width: 128px;
  height: 128px;
  border-radius: 28px;
  box-shadow: 0 10px 28px rgba(24, 50, 43, 0.2);
}

.button-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.subsection-title {
  margin-top: 1.1rem;
  font-size: 1.5rem;
}

.feature-list {
  margin: 0.7rem 0 0;
  padding-left: 1.1rem;
}

.feature-list li {
  margin-top: 0.5rem;
}

.feature-list p {
  margin: 0.15rem 0 0;
}

.agreement-note {
  margin-top: 1rem;
  font-size: 0.95rem;
}

.agreement-note a {
  margin-left: 0.45rem;
}

.terms-list {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.terms-list li {
  margin-top: 0.8rem;
}

.terms-list h2 {
  font-size: 1.3rem;
}

.section h2 {
  margin-top: 1.5rem;
}

.contact-frame-wrap {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.84);
}

.contact-frame {
  display: block;
  width: 100%;
  min-height: 760px;
  border: 0;
}

.button {
  display: inline-block;
  text-decoration: none;
  border-radius: 10px;
  padding: 0.58rem 0.95rem;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button-primary {
  background: var(--accent);
  color: #fff;
}

.button-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.button-subtle {
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink-main);
  border-color: var(--line);
}

.button-subtle:hover {
  background: #fff;
}

.button-disabled {
  background: rgba(130, 148, 140, 0.25);
  color: rgba(17, 42, 34, 0.6);
  border-color: rgba(17, 42, 34, 0.18);
  cursor: not-allowed;
  pointer-events: none;
}

.site-footer {
  padding: 2.4rem 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.footer-inner a {
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@keyframes rippleDrift {
  0%   { transform: translateX(0)     translateY(0);    }
  50%  { transform: translateX(-1.8%) translateY(1%);   }
  100% { transform: translateX(0)     translateY(0);    }
}

@keyframes orbFloat {
  0% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-14px) scale(1.03);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .bg-canopy {
    opacity: 0.62;
    filter: blur(4px);
  }

  .bg-water-ripples {
    height: 14vh;
    opacity: 0.20;
    animation-duration: 30s;
  }

  .header-inner {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.7rem 0;
  }

  .hero {
    padding-top: 3.6rem;
  }

  .hero-card {
    padding: 1.4rem;
  }

  .app-card {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .app-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-frame {
    min-height: 700px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bg-water-ripples,
  .bg-gradient-mist,
  .bg-orb {
    animation: none;
  }
}