@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap');

body {
  background: var(--color-bg-primary);
  background: var(--gradient-background);
  color: var(--color-text-primary);
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  line-height: var(--line-height-normal);
  min-height: 100vh;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(11, 13, 23, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-surface-border);
  padding: var(--spacing-sm) 0;
  transition: var(--transition-normal);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.nav__logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav__link {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__lang-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-full);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.nav__lang-switch:hover {
  background: var(--color-surface-border);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 var(--spacing-3xl);
  position: relative;
  overflow: hidden;
}

.hero__background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  opacity: 0.1;
}

.hero__wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 400px;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.hero__text {
  animation: fadeInUp 0.8s ease-out;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  transition: var(--transition-normal);
  text-decoration: none;
  cursor: pointer;
}

.btn--primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(162, 155, 254, 0.5);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-surface-border);
}

.btn--secondary:hover {
  background: var(--color-surface-border);
}

.btn--lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight 0.8s ease-out 0.2s backwards;
}

.hero__app-icon {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow);
  animation: float 3s ease-in-out infinite;
}

/* Features Section */
.features {
  padding: var(--spacing-3xl) 0;
}

.features__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 60px;
  height: 60px;
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary-dark);
  font-size: 28px;
}

.feature-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.feature-card__description {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* How It Works Section */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background: var(--color-bg-secondary);
}

.how-it-works__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.how-it-works__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: white;
  margin: 0 auto var(--spacing-md);
  box-shadow: var(--shadow-glow);
}

.step__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.step__description {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.step__visual {
  margin-top: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

/* Download Section */
.download {
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.download__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.download__icon {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow);
}

.download__stores {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.store-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text-primary);
  transition: var(--transition-normal);
  text-decoration: none;
}

.store-button:hover {
  background: var(--color-surface-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.store-button__icon {
  font-size: 28px;
}

.store-button__text {
  text-align: left;
}

.store-button__label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.store-button__store {
  display: block;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.download__contact {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-surface-border);
}

.download__contact-title {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.download__contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  transition: var(--transition-fast);
}

.download__contact-email:hover {
  color: var(--color-primary-dark);
}

/* Footer */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-surface-border);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer__container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer__copyright {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-primary);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__title {
    font-size: var(--font-size-3xl);
  }

  .hero__cta {
    justify-content: center;
  }

  .how-it-works__steps {
    grid-template-columns: 1fr;
  }

  .step {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav__menu {
    gap: var(--spacing-sm);
  }

  .nav__link {
    font-size: var(--font-size-sm);
  }

  .hero {
    padding: 100px 0 var(--spacing-2xl);
  }

  .hero__title {
    font-size: var(--font-size-2xl);
  }

  .hero__description {
    font-size: var(--font-size-md);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .section__title {
    font-size: var(--font-size-2xl);
  }

  .btn--lg {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
  }

  .download__stores {
    flex-direction: column;
    align-items: center;
  }

  .footer__content {
    flex-direction: column;
    text-align: center;
  }
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}