/* ============================================================
   サクベビ Web — 共通スタイルシート
   Design: 「親しみ × 信頼感」ライトテーマ
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Primary — Soft Coral */
  --color-primary: #FF6B6B;
  --color-primary-light: #FF8A80;
  --color-primary-lighter: #FFEAEA;
  --color-primary-dark: #E85555;

  /* Secondary — Lavender */
  --color-secondary: #9C7DD8;
  --color-secondary-light: #B39DDB;
  --color-secondary-lighter: #F0EAFB;

  /* Tertiary — Mint */
  --color-tertiary: #5BB5AD;
  --color-tertiary-light: #80CBC4;
  --color-tertiary-lighter: #E5F5F3;

  /* Neutral */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: #E8E4E0;
  --color-border-light: #F0EDEA;

  /* Text */
  --color-text: #2D2D2D;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-text-inverse: #FFFFFF;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-body: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Noto Sans JP', sans-serif;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --header-height: 72px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

/* --- Layout Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-text);
}

.site-logo__icon {
  font-size: 1.5rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--color-primary);
}

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  padding: var(--space-sm);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    font-size: 1rem;
    padding: var(--space-sm) 0;
  }
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, #FFF5F5 0%, var(--color-bg) 100%);
  overflow: hidden;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.hero__content {
  flex: 1;
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: var(--space-lg);
}

.hero__title .accent {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

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

.hero__visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-mockup {
  position: relative;
  width: 280px;
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 8px solid #1a1a1a;
  background: #000;
}

.phone-mockup img {
  width: 100%;
  display: block;
}

.phone-mockup::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: #1a1a1a;
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

/* Floating decorative orbs */
.hero__visual::before,
.hero__visual::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.3;
  z-index: -1;
}

.hero__visual::before {
  width: 200px;
  height: 200px;
  background: var(--color-primary-light);
  top: -20px;
  right: -40px;
}

.hero__visual::after {
  width: 160px;
  height: 160px;
  background: var(--color-secondary-light);
  bottom: -20px;
  left: -30px;
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-2xl) 0 var(--space-3xl);
  }

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

  .hero__content {
    max-width: 100%;
  }

  .hero__cta {
    justify-content: center;
  }

  .phone-mockup {
    width: 220px;
  }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(255, 107, 107, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.45);
  color: var(--color-text-inverse);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-lighter);
}

/* Store badges */
.store-badge {
  display: inline-block;
  height: 48px;
  transition: transform 0.2s ease;
}

.store-badge:hover {
  transform: scale(1.05);
}

.store-badge img {
  height: 100%;
  width: auto;
}

/* ============================================================
   Features Section
   ============================================================ */
.features {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Feature Block */
.feature-block {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
  padding: var(--space-3xl) 0;
}

.feature-block:nth-child(even) {
  flex-direction: row-reverse;
}

.feature-block__content {
  flex: 1;
}

.feature-block__visual {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
}

.feature-block__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.feature-block__tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-block__tag--coral {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

.feature-block__tag--lavender {
  background: var(--color-secondary-lighter);
  color: var(--color-secondary);
}

.feature-block__tag--mint {
  background: var(--color-tertiary-lighter);
  color: var(--color-tertiary);
}

.feature-block__title {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.feature-block__desc {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.feature-block__highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-block__highlights li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.feature-block__highlights li::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-size: 0.6875rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Phone in feature block */
.feature-phone {
  width: 240px;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 6px solid #1a1a1a;
  background: #000;
}

.feature-phone img {
  width: 100%;
  display: block;
}

/* Icon card for features without screenshot */
.feature-icon-card {
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, var(--color-primary-lighter) 0%, var(--color-secondary-lighter) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  box-shadow: var(--shadow-md);
}

.feature-icon-card__emoji {
  font-size: 4rem;
}

.feature-icon-card__label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Divider between feature blocks */
.feature-divider {
  border: none;
  height: 1px;
  background: var(--color-border-light);
  margin: 0;
}

@media (max-width: 768px) {
  .feature-block,
  .feature-block:nth-child(even) {
    flex-direction: column;
    text-align: center;
    gap: var(--space-xl);
  }

  .feature-block__highlights {
    align-items: center;
  }

  .feature-phone {
    width: 200px;
  }

  .feature-icon-card {
    width: 220px;
    height: 220px;
  }
}

/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, #FFF5F5 0%, #F0EAFB 50%, #E5F5F3 100%);
  text-align: center;
}

.cta-section__title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  margin-bottom: var(--space-md);
}

.cta-section__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

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

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: #2D2D2D;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer__tagline {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

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

.footer__link-group h4 {
  color: #FFFFFF;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer__link-group ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link-group a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer__link-group a:hover {
  color: #FFFFFF;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
}

.footer__contact a {
  color: rgba(255, 255, 255, 0.6);
}

.footer__contact a:hover {
  color: #FFFFFF;
}

@media (max-width: 768px) {
  .footer__top {
    flex-direction: column;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

/* ============================================================
   Legal / Content Pages (Privacy, Terms, Support)
   ============================================================ */
.legal-page {
  padding: var(--space-3xl) 0 var(--space-4xl);
}

.legal-page__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.legal-page__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--space-sm);
}

.legal-page__date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.legal-content {
  line-height: 2;
}

.legal-content h2 {
  font-size: 1.375rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary-lighter);
}

.legal-content h3 {
  font-size: 1.125rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.legal-content p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
}

.legal-content li {
  margin-bottom: var(--space-sm);
}

.legal-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(255, 107, 107, 0.3);
  text-underline-offset: 3px;
}

.legal-content a:hover {
  text-decoration-color: var(--color-primary);
}

/* Info card in legal pages */
.info-card {
  background: var(--color-primary-lighter);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  border-left: 4px solid var(--color-primary);
}

.info-card p {
  color: var(--color-text);
  margin-bottom: 0;
}

/* ============================================================
   Support Page
   ============================================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.faq-item summary {
  padding: var(--space-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  transition: background-color 0.2s ease;
}

.faq-item summary:hover {
  background: var(--color-bg);
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item__answer {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.contact-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-2xl);
  text-align: center;
}

.contact-card__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.contact-card__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.contact-card__desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

/* ============================================================
   Animations
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

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

  .hero__visual {
    animation: float 6s ease-in-out infinite;
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
}

/* ============================================================
   Scroll-driven reveal (IntersectionObserver fallback via JS)
   ============================================================ */

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
  .site-header,
  .site-footer,
  .cta-section,
  .hero__cta,
  .mobile-menu-btn {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .legal-content a::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #666;
  }
}