:root {
  --color-primary: #e8b4b8;
  --color-primary-light: #f5d5d8;
  --color-primary-dark: #c99499;
  --color-secondary: #f5e6d3;
  --color-secondary-light: #fff8f0;
  --color-secondary-dark: #dbc9b5;
  --color-accent-coral: #f4a9a8;
  --color-accent-sage: #b8d4c8;
  --color-accent-lavender: #d4c6e8;
  --color-accent-cream: #fff5eb;
  --color-accent-peach: #ffdab9;
  --color-success: #88c9a3;
  --color-warning: #ffd166;
  --color-error: #ef6461;
  --color-info: #6bb3d9;
  --color-white: #ffffff;
  --color-background: #fdf9f6;
  --color-surface: #ffffff;
  --color-border: #e8e0db;
  --color-text-primary: #3d3d3d;
  --color-text-secondary: #6b6b6b;
  --color-text-muted: #9b9b9b;
  --color-tag-sleep: #ffe4e1;
  --color-tag-eat: #ffe8cc;
  --color-tag-sibling: #e8f5e9;
  --color-tag-tantrum: #fce4ec;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.25rem;
  --spacing-2xl: 1.5rem;
  --spacing-3xl: 2rem;
  --spacing-4xl: 2.5rem;
  --spacing-5xl: 3rem;

  --font-size-xs: 0.625rem;
  --font-size-sm: 0.75rem;
  --font-size-base: 0.875rem;
  --font-size-lg: 1rem;
  --font-size-xl: 1.125rem;
  --font-size-2xl: 1.25rem;
  --font-size-3xl: 1.5rem;
  --font-size-4xl: 2rem;
  --font-size-5xl: 2.5rem;
  --font-size-6xl: 3rem;

  --border-radius-sm: 0.5rem;
  --border-radius-md: 0.75rem;
  --border-radius-lg: 1rem;
  --border-radius-xl: 1.25rem;
  --border-radius-2xl: 1.5rem;
  --border-radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 8px 16px rgba(0, 0, 0, 0.15);

  --transition-fast: 150ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto',
    'Hiragino Sans', 'Noto Sans JP', sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-accent-coral);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.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;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
  transition: color var(--transition-normal);
}

.header__logo img {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
}

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

.header__link {
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-normal);
}

.header__link:hover,
.header__link--active {
  color: var(--color-primary-dark);
}

.header__lang-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: all var(--transition-normal);
}

.header__lang-switch:hover {
  background-color: var(--color-secondary-light);
  color: var(--color-text-primary);
}

.header__lang-switch svg {
  width: 18px;
  height: 18px;
}

.header__menu-btn {
  display: none;
  padding: var(--spacing-sm);
}

.header__menu-btn svg {
  width: 24px;
  height: 24px;
  color: var(--color-text-primary);
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2xl);
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
  }

  .header__nav--open {
    display: flex;
  }

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

  .header__menu-btn {
    display: block;
  }

  .header__menu-btn--close {
    display: none;
  }

  .header__menu-btn--open {
    display: block;
  }

  .header__nav--open ~ .header__menu-btn .header__menu-btn--close {
    display: block;
  }

  .header__nav--open ~ .header__menu-btn .header__menu-btn--open {
    display: none;
  }
}

.hero {
  position: relative;
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(
    135deg,
    var(--color-primary-light) 0%,
    var(--color-secondary-light) 100%
  );
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(232, 180, 184, 0.3) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.hero__content {
  text-align: left;
}

.hero__badge {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-lg);
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.hero__description {
  font-size: var(--font-size-xl);
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-3xl);
}

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

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-2xl);
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.hero__cta--secondary {
  background-color: var(--color-white);
  color: var(--color-primary-dark);
}

.hero__cta--secondary:hover {
  background-color: var(--color-secondary-light);
}

.hero__cta--disabled {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}

.hero__cta svg {
  width: 24px;
  height: 24px;
}

.hero__image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__image img {
  max-width: 280px;
  border-radius: var(--border-radius-2xl);
  box-shadow: var(--shadow-xl);
  transform: rotate(-3deg);
}

.hero__image::after {
  content: '';
  position: absolute;
  top: 10%;
  left: 10%;
  right: -10%;
  bottom: -10%;
  background: linear-gradient(
    135deg,
    var(--color-secondary) 0%,
    var(--color-primary-light) 100%
  );
  border-radius: var(--border-radius-2xl);
  z-index: -1;
  transform: rotate(3deg);
}

@media (max-width: 960px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__content {
    text-align: center;
  }

  .hero__actions {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: var(--spacing-3xl) 0;
  }

  .hero__title {
    font-size: var(--font-size-4xl);
  }

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

  .hero__cta {
    width: 100%;
    justify-content: center;
  }
}

.section {
  padding: var(--spacing-5xl) 0;
}

.section--gray {
  background-color: var(--color-surface);
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.section__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

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

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-3xl);
}

.feature-card {
  padding: var(--spacing-3xl);
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-xl);
  padding: var(--spacing-xl);
  background: linear-gradient(
    135deg,
    var(--color-primary-light) 0%,
    var(--color-secondary-light) 100%
  );
  border-radius: var(--border-radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card__icon svg {
  width: 40px;
  height: 40px;
  color: var(--color-primary-dark);
}

.feature-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.feature-card__description {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.screenshots {
  overflow: hidden;
}

.screenshots__slider {
  display: flex;
  gap: var(--spacing-3xl);
  animation: scroll 40s linear infinite;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-100%);
  }
}

.screenshots__slider:hover {
  animation-play-state: paused;
}

.screenshots__item {
  flex-shrink: 0;
  width: 280px;
}

.screenshots__item img {
  width: 100%;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
}

.problems {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.problem-card {
  padding: var(--spacing-2xl);
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-error);
  border-radius: var(--border-radius-md);
}

.problem-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(239, 100, 97, 0.1);
  border-radius: var(--border-radius-lg);
}

.problem-card__icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-error);
}

.problem-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.problem-card__text {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.faq {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.faq__question {
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--color-surface);
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  transition: background-color var(--transition-normal);
}

.faq__question:hover {
  background-color: var(--color-secondary-light);
}

.faq__answer {
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--color-white);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.cta-section {
  text-align: center;
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-secondary) 100%
  );
  color: var(--color-white);
}

.cta-section__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
}

.cta-section__description {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-3xl);
  opacity: 0.95;
}

.cta-section__actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.footer {
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer__logo img {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
}

.footer__logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.footer__links {
  display: flex;
  gap: var(--spacing-2xl);
}

.footer__link {
  color: var(--color-text-secondary);
  transition: color var(--transition-normal);
}

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

.footer__bottom {
  text-align: center;
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

@media (max-width: 640px) {
  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__logo {
    justify-content: center;
  }

  .footer__links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

.contact {
  max-width: 600px;
  margin: 0 auto;
}

.contact-card {
  padding: var(--spacing-3xl);
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.contact-card__email {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-primary-dark);
  word-break: break-all;
  margin: var(--spacing-lg) 0;
}

.contact-card__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.features-detail {
  display: grid;
  gap: var(--spacing-3xl);
}

.features-detail__item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  padding: var(--spacing-3xl);
  background-color: var(--color-white);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
}

.features-detail__item--reverse {
  direction: rtl;
}

.features-detail__item--reverse > * {
  direction: ltr;
}

.features-detail__content {
  padding: var(--spacing-lg);
}

.features-detail__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.features-detail__description {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.features-detail__image {
  display: flex;
  justify-content: center;
}

.features-detail__image img {
  max-width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .features-detail__item,
  .features-detail__item--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .features-detail__image {
    order: -1;
  }
}

.main-content {
  padding: var(--spacing-5xl) 0;
  min-height: calc(100vh - 200px);
}

.page-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text-primary);
  text-align: center;
}

.policy-content {
  max-width: 800px;
  margin: 0 auto;
}

.effective-date {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-4xl);
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-md);
  font-weight: 500;
}

.policy-section {
  margin-bottom: var(--spacing-4xl);
  padding: var(--spacing-3xl);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-sm);
}

.policy-section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.policy-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.policy-text {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.policy-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: var(--spacing-lg);
}

.policy-list li {
  padding-left: var(--spacing-2xl);
  margin-bottom: var(--spacing-sm);
  position: relative;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.policy-list li::before {
  content: '•';
  position: absolute;
  left: var(--spacing-sm);
  color: var(--color-primary-dark);
  font-weight: bold;
}

.policy-list li a {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.policy-list li a:hover {
  color: var(--color-primary);
}

@media (max-width: 640px) {
  .main-content {
    padding: var(--spacing-3xl) 0;
  }

  .page-title {
    font-size: var(--font-size-4xl);
  }

  .policy-section {
    padding: var(--spacing-xl);
  }

  .policy-section-title {
    font-size: var(--font-size-xl);
  }

  .policy-subtitle {
    font-size: var(--font-size-lg);
  }
}