/* ============================================
   FLOW SERIES — Premium Design System
   Inter + Noto Sans JP | 1100px | Modern D2C
   ============================================ */

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

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  /* Base Colors */
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --section-alt: #F7F8FA;
  --light-gray: #E8E9ED;
  --medium-gray: #999DA8;
  --dark-gray: #4A4E59;
  --text-primary: #111111;
  --text-secondary: #555963;

  /* Accent — overridden by data-theme */
  --accent: #6B9E78;
  --accent-light: #A3C9AC;
  --accent-pale: #DEF0E2;
  --accent-dark: #4A7A56;
  --gradient-cta: linear-gradient(135deg, #6B9E78 0%, #8AB896 50%, #5A8A66 100%);
  --gradient-badge: linear-gradient(135deg, #6B9E78 0%, #A3C9AC 100%);

  /* Backgrounds */
  --body-bg: #FFFFFF;
  --hero-bg: #FFFFFF;
  --section-bg: #FFFFFF;
  --section-alt-bg: #F7F8FA;
  --offer-bg: #F7F8FA;
  --final-cta-bg: linear-gradient(180deg, #F7F8FA 0%, #FFFFFF 50%, #F7F8FA 100%);
  --hero-glow: rgba(107, 158, 120, 0.08);
  --cta-shadow: rgba(107, 158, 120, 0.25);
  --cta-shadow-hover: rgba(107, 158, 120, 0.35);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.10);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-btn: 40px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   THEME: Pure Radiance (Soft Pink)
   ============================================ */
[data-theme="pure-radiance"] {
  --accent: #F2A7C0;
  --accent-light: #F8C8D8;
  --accent-pale: rgba(242, 167, 192, 0.12);
  --accent-dark: #D88AA5;
  --gradient-cta: linear-gradient(135deg, #F2A7C0 0%, #F5BCD0 50%, #E899B2 100%);
  --gradient-badge: linear-gradient(135deg, #E899B2 0%, #F2A7C0 100%);
  --hero-glow: rgba(242, 167, 192, 0.10);
  --cta-shadow: rgba(242, 167, 192, 0.30);
  --cta-shadow-hover: rgba(242, 167, 192, 0.40);
}

/* ============================================
   THEME: Mind Flow (Soft Blue)
   ============================================ */
[data-theme="mind-flow"] {
  --accent: #6FA8FF;
  --accent-light: #9DC3FF;
  --accent-pale: rgba(111, 168, 255, 0.10);
  --accent-dark: #5590E6;
  --gradient-cta: linear-gradient(135deg, #5590E6 0%, #6FA8FF 50%, #4A80D6 100%);
  --gradient-badge: linear-gradient(135deg, #4A80D6 0%, #6FA8FF 100%);
  --hero-glow: rgba(111, 168, 255, 0.08);
  --cta-shadow: rgba(111, 168, 255, 0.25);
  --cta-shadow-hover: rgba(111, 168, 255, 0.35);
}

/* ============================================
   THEME: Core Flow (Dark Navy)
   ============================================ */
[data-theme="core-flow"] {
  --white: #2A3650;
  --off-white: #253045;
  --section-alt: #2E3A55;
  --light-gray: #3A4868;
  --medium-gray: #8E96AE;
  --dark-gray: #C4CAD8;
  --text-primary: #E8EAF2;
  --text-secondary: #A4ACBE;
  --accent: #8498C6;
  --accent-light: #A0B0D4;
  --accent-pale: rgba(132, 152, 198, 0.15);
  --accent-dark: #6478A6;
  --gradient-cta: linear-gradient(135deg, #4E6290 0%, #6478A6 50%, #425680 100%);
  --gradient-badge: linear-gradient(135deg, #425680 0%, #6478A6 100%);
  --body-bg: #1E2840;
  --hero-bg: #1E2840;
  --section-bg: rgba(36, 46, 70, 0.95);
  --section-alt-bg: rgba(42, 54, 80, 0.95);
  --offer-bg: rgba(38, 50, 74, 0.95);
  --final-cta-bg: linear-gradient(180deg, #243050 0%, #1E2840 50%, #2A3858 100%);
  --hero-glow: rgba(100, 120, 166, 0.10);
  --cta-shadow: rgba(0, 0, 0, 0.30);
  --cta-shadow-hover: rgba(0, 0, 0, 0.40);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.22);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.26);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.30);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.18);
}

[data-theme="core-flow"] .problem__item,
[data-theme="core-flow"] .faq-item,
[data-theme="core-flow"] .safety-card {
  border-color: rgba(255, 255, 255, 0.06);
}

[data-theme="core-flow"] .sticky-bar {
  background: rgba(30, 40, 64, 0.95);
  border-top-color: rgba(255, 255, 255, 0.08);
}

[data-theme="core-flow"] .footer {
  background: #141C30;
}

[data-theme="core-flow"] .img-placeholder {
  background: linear-gradient(135deg, #2E3A52 0%, #364460 100%);
  color: #8E96AE;
}

[data-theme="core-flow"] .img-placeholder::before {
  border-color: rgba(255, 255, 255, 0.06);
}

[data-theme="core-flow"] .highlight {
  background: linear-gradient(transparent 60%, rgba(132, 152, 198, 0.20) 60%);
}

[data-theme="core-flow"] .hero__image--product img,
[data-theme="core-flow"] .solution__product-image--real img {
  filter: drop-shadow(0 16px 50px rgba(0, 0, 0, 0.4));
}

[data-theme="core-flow"] .offer__card {
  border-color: rgba(132, 152, 198, 0.20);
}

[data-theme="core-flow"] .review-card::before {
  color: rgba(132, 152, 198, 0.20);
}

/* ============================================
   THEME: Pure Flow (Warm Gold)
   ============================================ */
[data-theme="pure-flow"] {
  --accent: #B89E5A;
  --accent-light: #D4C08E;
  --accent-pale: rgba(184, 158, 90, 0.12);
  --accent-dark: #9A8548;
  --gradient-cta: linear-gradient(135deg, #9A8548 0%, #B89E5A 50%, #8A7740 100%);
  --gradient-badge: linear-gradient(135deg, #8A7740 0%, #B89E5A 100%);
  --hero-glow: rgba(184, 158, 90, 0.08);
  --cta-shadow: rgba(184, 158, 90, 0.25);
  --cta-shadow-hover: rgba(184, 158, 90, 0.35);
}

/* ============================================
   THEME: Flow D-fense (Sage Green)
   ============================================ */
[data-theme="flow-defense"] {
  --accent: #7EA88A;
  --accent-light: #A3C5AD;
  --accent-pale: rgba(126, 168, 138, 0.12);
  --accent-dark: #658E70;
  --gradient-cta: linear-gradient(135deg, #658E70 0%, #7EA88A 50%, #577A62 100%);
  --gradient-badge: linear-gradient(135deg, #577A62 0%, #7EA88A 100%);
  --hero-glow: rgba(126, 168, 138, 0.08);
  --cta-shadow: rgba(126, 168, 138, 0.25);
  --cta-shadow-hover: rgba(126, 168, 138, 0.35);
}

/* ============================================
   BASE
   ============================================ */
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background-color: var(--body-bg);
  line-height: 1.8;
  font-weight: 400;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 120px 0;
  background: var(--section-bg);
}

.section--alt {
  background: var(--section-alt-bg);
}

/* Legacy class compatibility */
.section--cream {
  background: var(--section-alt-bg);
}

.text-center {
  text-align: center;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.section-label {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.9;
  max-width: 640px;
  margin: 0 auto 56px;
}

.highlight {
  background: linear-gradient(transparent 60%, var(--accent-pale) 60%);
  padding: 0 2px;
}

.divider {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 0 auto 40px;
  border-radius: 1px;
}

/* ============================================
   BADGE
   ============================================ */
.badge {
  display: inline-block;
  background: var(--gradient-badge);
  color: #FFFFFF;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 6px 18px;
  border-radius: var(--radius-btn);
}

/* ============================================
   SVG ICONS
   ============================================ */
.icon-svg {
  display: block;
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.icon-svg--md {
  width: 26px;
  height: 26px;
}

.icon-svg--lg {
  width: 28px;
  height: 28px;
}

/* ============================================
   IMAGE PLACEHOLDERS
   ============================================ */
.img-placeholder {
  background: linear-gradient(135deg, var(--section-alt) 0%, var(--light-gray) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--medium-gray);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: inherit;
  pointer-events: none;
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.hero__image--product {
  background: transparent;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

.hero__image--product .product-img,
.hero__image--product img {
  border-radius: 0;
  box-shadow: none;
  filter: drop-shadow(0 20px 48px rgba(0, 0, 0, 0.12));
}

.solution__product-image--real {
  background: transparent;
  padding: 0;
  border-radius: 0;
  overflow: visible;
  box-shadow: none;
}

.solution__product-image--real .product-img,
.solution__product-image--real img {
  border-radius: 0;
  box-shadow: none;
  filter: drop-shadow(0 20px 48px rgba(0, 0, 0, 0.12));
}

/* ============================================
   CTA BUTTON
   ============================================ */
.cta-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--gradient-cta);
  color: #FFFFFF;
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 16px 40px;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  box-shadow: 0 4px 20px var(--cta-shadow);
  position: relative;
  overflow: hidden;
  text-align: center;
  max-width: 100%;
  box-sizing: border-box;
  gap: 6px;
  line-height: 1.4;
}

.cta-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, transparent 100%);
  pointer-events: none;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--cta-shadow-hover);
}

.cta-btn:active {
  transform: translateY(0);
  transition-duration: 0.1s;
}

.cta-btn__main {
  display: block;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.cta-btn--large {
  padding: 20px 48px;
  width: 100%;
  max-width: 440px;
}

.cta-btn--large .cta-btn__main {
  font-size: 1.125rem;
}

.cta-btn__sub {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.85;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.cta-note {
  font-size: 0.8125rem;
  color: var(--medium-gray);
  margin-top: 14px;
}

/* ============================================
   STICKY BAR
   ============================================ */
.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 12px 24px;
  transform: translateY(100%);
  transition: transform 0.4s var(--ease);
}

.sticky-bar.visible {
  transform: translateY(0);
}

.sticky-bar__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.sticky-bar__info {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.sticky-bar__price {
  font-family: 'Inter', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
}

.sticky-bar__price-note {
  font-size: 0.6875rem;
  color: var(--medium-gray);
}

.sticky-bar__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-cta);
  color: #FFFFFF;
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 12px 32px;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  box-shadow: 0 2px 12px var(--cta-shadow);
}

.sticky-bar__btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--cta-shadow-hover);
}

/* ============================================
   1. HERO SECTION
   ============================================ */
.hero {
  background: var(--hero-bg);
  padding: 120px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 70%;
  height: 140%;
  background: radial-gradient(ellipse, var(--hero-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero__badge {
  margin-bottom: 24px;
}

.hero__brand {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--medium-gray);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.hero__title {
  font-family: 'Inter', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.hero__tagline {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--accent-dark);
  letter-spacing: 0.04em;
  margin-bottom: 36px;
  line-height: 1.9;
}

.hero__image {
  width: 100%;
  max-width: 440px;
  aspect-ratio: 4 / 5;
  margin-bottom: 40px;
}

.hero__copy {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 36px;
  max-width: 560px;
}

.hero__price {
  margin-bottom: 12px;
}

.hero__price-regular {
  font-size: 0.875rem;
  color: var(--medium-gray);
  text-decoration: line-through;
  margin-right: 8px;
}

.hero__price-current {
  font-family: 'Inter', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
}

.hero__price-tax {
  font-size: 0.75rem;
  color: var(--medium-gray);
}

.hero__points {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__point {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.hero__point-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.5625rem;
  color: var(--accent);
  flex-shrink: 0;
}

/* ============================================
   2. PROBLEM SECTION
   ============================================ */
.problem__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 640px;
  margin: 0 auto 56px;
}

.problem__item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.problem__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.problem__text {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.problem__item-text {
  flex: 1;
}

.problem__item-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.problem__item-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.problem__note {
  text-align: center;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 36px;
}

.problem__note strong {
  color: var(--accent);
  font-weight: 600;
}

/* ============================================
   3. CAUSE SECTION
   ============================================ */
.cause__content {
  max-width: 720px;
  margin: 0 auto;
}

.cause__lead {
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 28px;
  line-height: 1.8;
}

.cause__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 28px;
}

.cause__highlight-box {
  background: var(--white);
  border-left: 3px solid var(--accent);
  padding: 28px 32px;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: 36px 0;
  box-shadow: var(--shadow-card);
}

.cause__highlight-box p {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.9;
}

.cause__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 48px 0;
}

.cause__step {
  text-align: center;
  padding: 28px 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.cause__step-num {
  font-family: 'Inter', sans-serif;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.cause__step-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-pale);
  border-radius: 50%;
  flex-shrink: 0;
}

.cause__step-text {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   4. SOLUTION SECTION
   ============================================ */
.solution {
  background: var(--section-bg);
  position: relative;
  overflow: hidden;
}

.solution__product-image {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 3 / 4;
  margin: 0 auto 56px;
}

.solution__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.solution__feature {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.solution__feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-pale);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.solution__feature-title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

.solution__feature-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   5. INGREDIENTS SECTION
   ============================================ */
.ingredients__list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.ingredient-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
  overflow: hidden;
}

.ingredient-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.ingredient-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  flex-shrink: 0;
}

.ingredient-card__content {
  flex: 1;
  padding: 28px 32px 32px;
}

.ingredient-card__badge {
  margin-bottom: 10px;
}

.ingredient-card__name {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.ingredient-card__name-en {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  color: var(--medium-gray);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.ingredient-card__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ============================================
   6. RESEARCH SECTION
   ============================================ */
.research__card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.research__image {
  width: 100%;
  aspect-ratio: 16 / 7;
}

.research__body {
  padding: 44px 40px;
}

.research__institute {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.research__title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.6;
}

.research__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 28px;
}

.research__points {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.research__point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.research__point-check {
  width: 22px;
  height: 22px;
  min-width: 22px;
  border-radius: 50%;
  background: var(--accent-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ============================================
   7. BENEFITS SECTION
   ============================================ */
.benefits__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.benefit-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

.benefit-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-pale);
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.benefit-card__title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.benefit-card__desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ============================================
   8. REVIEWS SECTION
   ============================================ */
.reviews__slider {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.review-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.review-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.review-card::before {
  content: '\201C';
  position: absolute;
  top: 16px;
  left: 28px;
  font-family: 'Inter', serif;
  font-size: 3rem;
  color: var(--accent-light);
  line-height: 1;
  opacity: 0.5;
}

.review-card__header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.review-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

.review-card__info {
  flex: 1;
}

.review-card__name {
  font-size: 0.875rem;
  font-weight: 600;
}

.review-card__meta {
  font-size: 0.75rem;
  color: var(--medium-gray);
}

.review-card__stars {
  color: #F59E0B;
  font-size: 0.875rem;
  letter-spacing: 2px;
}

.review-card__body {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.9;
  padding-left: 4px;
}

.review-card__body strong {
  color: var(--text-primary);
  font-weight: 500;
}

.reviews__note {
  text-align: center;
  font-size: 0.75rem;
  color: var(--medium-gray);
  margin-top: 24px;
}

/* ============================================
   9. SAFETY SECTION
   ============================================ */
.safety__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.safety-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(0, 0, 0, 0.03);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.safety-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.safety-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-pale);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.safety-card__title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.safety-card__desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   10. OFFER SECTION
   ============================================ */
.offer {
  background: var(--offer-bg);
  position: relative;
  overflow: hidden;
}

.offer__card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  box-shadow: var(--shadow-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.offer__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-cta);
}

.offer__badge {
  margin-bottom: 24px;
}

.offer__title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.offer__subtitle {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.offer__pricing {
  margin-bottom: 36px;
}

.offer__price-regular {
  font-size: 0.9375rem;
  color: var(--medium-gray);
  text-decoration: line-through;
  margin-bottom: 4px;
}

.offer__price-main {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 4px;
}

.offer__price-yen {
  font-family: 'Inter', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
}

.offer__price-amount {
  font-family: 'Inter', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.offer__price-tax {
  font-size: 0.75rem;
  color: var(--medium-gray);
}

.offer__price-save {
  display: inline-block;
  background: var(--accent-pale);
  color: var(--accent-dark);
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 20px;
  border-radius: var(--radius-btn);
  margin-top: 10px;
}

.offer__benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
  text-align: left;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.offer__benefit {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.offer__benefit-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: var(--accent);
  flex-shrink: 0;
}

.offer__guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--light-gray);
}

/* ============================================
   11. FAQ SECTION
   ============================================ */
.faq__list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.faq-item__question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
}

.faq-item__question:hover {
  background: var(--off-white);
}

.faq-item__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--section-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 0.875rem;
  color: var(--medium-gray);
}

.faq-item.active .faq-item__icon {
  background: var(--accent-pale);
  color: var(--accent);
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}

.faq-item.active .faq-item__answer {
  max-height: 400px;
}

.faq-item__answer-inner {
  padding: 0 28px 24px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ============================================
   12. FINAL CTA
   ============================================ */
.final-cta {
  background: var(--final-cta-bg);
  text-align: center;
  padding: 120px 0 160px;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--hero-glow) 0%, transparent 60%);
  pointer-events: none;
}

.final-cta__title {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  position: relative;
  line-height: 1.5;
}

.final-cta__sub {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 44px;
  line-height: 1.9;
  position: relative;
}

/* ============================================
   13. FOOTER
   ============================================ */
.footer {
  background: #111111;
  color: rgba(255, 255, 255, 0.5);
  padding: 48px 0;
  text-align: center;
}

.footer__brand {
  font-family: 'Inter', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
}

.footer__product {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: 20px;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer__link {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  transition: var(--transition);
}

.footer__link:hover {
  color: rgba(255, 255, 255, 0.7);
}

.footer__copy {
  font-family: 'Inter', sans-serif;
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.25);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }

/* ============================================
   RESPONSIVE — Tablet (max-width: 768px)
   ============================================ */
@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .container {
    padding: 0 20px;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 1rem;
    margin-bottom: 40px;
  }

  .hero {
    padding: 100px 0 80px;
  }

  .hero__title {
    font-size: 2.25rem;
  }

  .hero__tagline {
    font-size: 1.0625rem;
  }

  .hero__image {
    max-width: 320px;
  }

  .hero__points {
    gap: 14px;
  }

  .cause__steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .cause__step {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    padding: 18px 24px;
  }

  .cause__step-icon {
    margin: 0;
  }

  .solution__features {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .solution__feature {
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: left;
    padding: 24px;
  }

  .solution__feature-icon {
    margin: 0;
    flex-shrink: 0;
  }

  .ingredient-card {
    flex-direction: column;
  }

  .ingredient-card__content {
    padding: 22px 24px 26px;
  }

  .benefits__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .safety__grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .safety-card {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    padding: 22px 24px;
  }

  .safety-card__icon {
    margin: 0;
    flex-shrink: 0;
  }

  .offer__card {
    padding: 40px 24px;
  }

  .offer__price-amount {
    font-size: 2.5rem;
  }

  .sticky-bar {
    padding: 10px 16px;
  }

  .sticky-bar__btn {
    font-size: 0.8125rem;
    padding: 10px 24px;
  }

  .footer__links {
    gap: 16px;
  }

  .final-cta {
    padding: 80px 0 140px;
  }

  .final-cta__title {
    font-size: 1.625rem;
  }
}

/* ============================================
   RESPONSIVE — Mobile (max-width: 480px)
   ============================================ */
@media (max-width: 480px) {
  .hero__brand {
    letter-spacing: 0.15em;
    font-size: 0.6875rem;
  }

  .hero__title {
    font-size: 2rem;
  }

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

  .section-title {
    font-size: 1.5rem;
  }

  .cta-btn {
    padding: 16px 32px;
  }

  .cta-btn__main {
    font-size: 1rem;
  }

  .cta-btn--large {
    padding: 18px 32px;
  }

  .cta-btn--large .cta-btn__main {
    font-size: 1.0625rem;
  }

  .research__body {
    padding: 28px 24px;
  }

  .final-cta__title {
    font-size: 1.375rem;
  }

  .offer__price-amount {
    font-size: 2.25rem;
  }
}