/* ランディング共通: hero・モバイルメニュー・カード等（フォントは各ページで指定） */
body {
  scroll-behavior: smooth;
}
.hero-bg {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  position: relative;
  overflow: hidden;
}
.hero-bg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle at 20% 30%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
  z-index: 0;
}
.glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.text-gradient {
  background: linear-gradient(to right, #4f46e5, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.grid-bg {
  background-size: 40px 40px;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
}
#mobile-menu {
  position: fixed !important;
  left: 0;
  right: 0;
  top: 64px;
  bottom: 0;
  width: 100vw;
  height: calc(100vh - 64px);
  display: none !important;
  flex-direction: column;
  background: #ffffff;
  border-top: 1px solid #e2e8f0;
  z-index: 9999 !important;
  overflow-y: auto;
}
#mobile-menu.is-open {
  display: flex !important;
}
@media (min-width: 1280px) {
  #mobile-menu {
    display: none !important;
  }
}
/* グローバルナビのみ固定（ページ内の <header> は対象外にする） */
body > header {
  position: fixed;
  z-index: 1000;
}
#mobile-menu {
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 24px);
}
#mobile-menu .mobile-menu-inner {
  flex: 1;
  min-height: 0;
  padding: 1.5rem 1.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
#mobile-menu .mobile-lang-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #64748b;
  margin-bottom: 0.75rem;
}
#mobile-menu .mobile-lang-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}
#mobile-menu .mobile-lang-grid a {
  padding: 0.625rem 0.875rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.15s, color 0.15s;
}
#mobile-menu .mobile-nav-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0 8%, #e2e8f0 92%, transparent);
  margin: 0.25rem 0 0;
}
#mobile-menu .mobile-nav-section {
  padding-top: 0.25rem;
}
#mobile-menu .mobile-nav-link {
  display: block;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  color: #334155;
  border-radius: 0.5rem;
  transition: background-color 0.15s, color 0.15s;
}
#mobile-menu .mobile-nav-link:hover,
#mobile-menu .mobile-nav-link:focus {
  background-color: #f1f5f9;
  color: #4f46e5;
}
#mobile-menu .mobile-cta-wrap {
  padding-top: 0.5rem;
  border-top: 1px solid #e2e8f0;
}
#mobile-menu .mobile-cta {
  display: block;
  width: 100%;
  text-align: center;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
  border-radius: 0.75rem;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
  transition: box-shadow 0.2s, transform 0.1s;
}
#mobile-menu .mobile-cta:hover,
#mobile-menu .mobile-cta:focus {
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}
#mobile-menu .mobile-cta:active {
  transform: scale(0.98);
}