:root {
  --bg: #f7f4ec;
  --bg-strong: #ece2cd;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #1f2a22;
  --muted: #617066;
  --line: rgba(31, 42, 34, 0.12);
  --brand: #2d6a4f;
  --brand-strong: #1b4332;
  --accent: #d97706;
  --danger: #b42318;
  --shadow: 0 18px 45px rgba(27, 67, 50, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(217, 119, 6, 0.2), transparent 28%),
    radial-gradient(circle at top right, rgba(45, 106, 79, 0.18), transparent 22%),
    linear-gradient(180deg, #f8f5ef 0%, #f5efe2 52%, #fcfbf8 100%);
  min-height: 100vh;
}

a {
  color: var(--brand-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(248, 245, 239, 0.8);
  border-bottom: 1px solid rgba(31, 42, 34, 0.08);
}

.topbar-inner,
.hero,
.section,
.footer-inner,
.page-header,
.page-section {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  color: #fff;
  border-radius: 14px;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(27, 67, 50, 0.2);
}

.brand-copy strong,
.brand-copy span {
  display: block;
}

.brand-copy strong {
  font-size: 0.95rem;
}

.brand-copy span {
  font-size: 0.8rem;
  color: var(--muted);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--text);
}

.language-selector {
  display: inline-flex;
  gap: 8px;
}

.language-btn {
  border: 1px solid rgba(27, 67, 50, 0.2);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.language-btn.active,
.language-btn:hover {
  border-color: var(--brand-strong);
  background: var(--brand-strong);
  color: #fff;
}

.hero {
  padding: 72px 0 48px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 32px;
  align-items: center;
}

.hero-copy,
.hero-panel,
.panel,
.article-card,
.entry-card,
.auth-card,
.app-detail-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow);
  border-radius: var(--radius-xl);
}

.hero-copy {
  padding: 44px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(45, 106, 79, 0.1);
  color: var(--brand-strong);
  font-size: 0.86rem;
  font-weight: 700;
}

.hero h1,
.page-header h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 1.02;
}

.hero p,
.page-header p,
.panel p,
.entry-card p,
.article-card p,
.auth-card p,
.app-detail-card p,
.body-copy {
  color: var(--muted);
  line-height: 1.75;
}

.cta-row,
.inline-links,
.form-actions,
.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  color: #fff;
  box-shadow: 0 14px 30px rgba(27, 67, 50, 0.22);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--brand-strong);
  border-color: rgba(27, 67, 50, 0.16);
}

.button:hover,
.button-secondary:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-panel {
  padding: 28px;
}

.hero-panel-grid,
.panel-grid,
.app-grid,
.article-grid,
.entry-grid,
.feature-grid,
.form-grid {
  display: grid;
  gap: 18px;
}

.hero-panel-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-card,
.app-card,
.feature-card {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(248, 245, 239, 0.96) 100%);
  border: 1px solid rgba(31, 42, 34, 0.08);
}

.stat-card strong,
.app-card strong,
.feature-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.section,
.page-section {
  padding: 28px 0 52px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 24px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.panel {
  padding: 28px;
}

.panel-grid,
.app-grid,
.article-grid,
.entry-grid,
.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.app-card,
.article-card,
.entry-card,
.auth-card,
.app-detail-card {
  padding: 24px;
}

.tag {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.84rem;
  background: rgba(217, 119, 6, 0.12);
  color: #9a5b08;
  font-weight: 700;
}

.tag.success {
  background: rgba(45, 106, 79, 0.12);
  color: var(--brand-strong);
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.75;
}

.list strong {
  color: var(--text);
}

.page-header {
  padding: 56px 0 20px;
}

.subnav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.app-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(31, 42, 34, 0.08);
}

.timeline-item time {
  color: var(--brand-strong);
  font-weight: 700;
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 24px;
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 8px;
}

.field.full {
  grid-column: 1 / -1;
}

label {
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid rgba(31, 42, 34, 0.14);
  background: #fff;
  font: inherit;
}

.notice,
.callout {
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(217, 119, 6, 0.1);
  color: #8a5208;
  line-height: 1.65;
}

.callout.success {
  background: rgba(45, 106, 79, 0.1);
  color: var(--brand-strong);
}

.footer {
  padding: 40px 0 56px;
}

.footer-inner {
  padding: 28px;
  background: rgba(27, 67, 50, 0.92);
  color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-xl);
}

.footer-inner a {
  color: #fff;
}

.lang-ja,
.lang-en {
  display: none;
}

html[lang="ja"] .lang-ja {
  display: block;
}

html[lang="en"] .lang-en {
  display: block;
}

span.lang-ja,
span.lang-en,
a.lang-ja,
a.lang-en,
strong.lang-ja,
strong.lang-en {
  display: none;
}

html[lang="ja"] span.lang-ja,
html[lang="ja"] a.lang-ja,
html[lang="ja"] strong.lang-ja {
  display: inline;
}

html[lang="en"] span.lang-en,
html[lang="en"] a.lang-en,
html[lang="en"] strong.lang-en {
  display: inline;
}

@media (max-width: 960px) {
  .hero,
  .app-hero,
  .auth-layout,
  .topbar-inner {
    grid-template-columns: 1fr;
    display: grid;
  }

  .main-nav {
    gap: 12px;
  }

  .hero-panel-grid,
  .panel-grid,
  .app-grid,
  .article-grid,
  .entry-grid,
  .feature-grid,
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .hero-copy,
  .hero-panel,
  .panel,
  .app-card,
  .article-card,
  .entry-card,
  .auth-card,
  .app-detail-card,
  .footer-inner {
    padding: 22px;
    border-radius: 22px;
  }

  .hero,
  .section,
  .page-section,
  .page-header {
    width: min(var(--max-width), calc(100% - 20px));
  }

  .hero-panel-grid,
  .panel-grid,
  .app-grid,
  .article-grid,
  .entry-grid,
  .feature-grid,
  .form-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    gap: 12px;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .topbar-inner {
    gap: 14px;
  }
}