/* ========================================
   Design System
   ======================================== */

:root {
  /* Colors */
  --color-bg: #FAF7F2;
  --color-bg-warm: #F3EDE3;
  --color-surface: #F0EBE1;
  --color-text: #2C2C2C;
  --color-text-light: #5A5650;
  --color-text-muted: #8A847A;
  --color-accent: #2D5A1E;
  --color-accent-hover: #224715;
  --color-accent-light: #D4E4CF;
  --color-border: #E2DCD2;
  --color-white: #FFFDF9;

  /* Typography */
  --font-serif: 'Noto Serif JP', 'Yu Mincho', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Layout */
  --container-max: 1120px;
  --container-narrow: 720px;
  --container-pad: 1.5rem;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-soft: 0 2px 20px rgba(44, 44, 44, 0.06);
  --shadow-card: 0 4px 30px rgba(44, 44, 44, 0.08);

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration: 0.3s;
}


/* ========================================
   Reset & Base
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.9;
  letter-spacing: 0.02em;
}

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

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

ul, ol {
  list-style: none;
}

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


/* ========================================
   Header
   ======================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 220, 210, 0.5);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

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

.site-nav a {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-light);
  transition: color var(--duration) var(--ease);
}

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

.nav-cta {
  background: var(--color-accent);
  color: var(--color-white) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 400;
  transition: background var(--duration) var(--ease) !important;
}

.nav-cta:hover {
  background: var(--color-accent-hover) !important;
}


/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 400;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  letter-spacing: 0.04em;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.875rem 2.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(45, 90, 30, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 1rem 3rem;
  font-size: var(--text-lg);
}

.btn-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.btn-text:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}


/* ========================================
   Hero
   ======================================== */

.hero {
  padding-top: calc(60px + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-label {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-accent);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-accent-light);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-light);
  line-height: 2;
  margin-bottom: var(--space-xl);
}

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

/* Hero illustration placeholder */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image {
  width: 100%;
  max-width: 460px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 48px rgba(60, 40, 20, 0.12);
}


/* ========================================
   Section shared styles
   ======================================== */

section h2 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.03em;
}


/* ========================================
   Empathy
   ======================================== */

.empathy {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
}

.empathy-inner {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.empathy h2 {
  margin-bottom: var(--space-2xl);
}

.empathy-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.empathy-list li {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  position: relative;
  line-height: 1.8;
}

.empathy-list li::before {
  content: '—';
  margin-right: var(--space-sm);
  color: var(--color-text-muted);
}


/* ========================================
   Solution / How it works
   ======================================== */

.solution {
  padding: var(--space-4xl) 0;
  background: var(--color-surface);
}

.solution h2 {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.solution-body {
  text-align: center;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  font-size: var(--text-base);
  line-height: 2;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.step-label {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.step-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 160px;
}

.step-divider {
  flex: 0 0 auto;
  width: 48px;
  height: 1px;
  background: var(--color-border);
  margin-top: 24px;
}


/* ========================================
   Emotional value
   ======================================== */

.emotion {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
}

.emotion-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.emotion-visual {
  display: flex;
  justify-content: center;
}

.emotion-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 48px rgba(60, 40, 20, 0.12);
}

.emotion-text h2 {
  margin-bottom: var(--space-2xl);
}

.emotion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.emotion-list li {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text-light);
  line-height: 1.8;
  padding-left: var(--space-lg);
  position: relative;
}

.emotion-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background: var(--color-accent-light);
  border-radius: 50%;
}


/* ========================================
   Reassurance
   ======================================== */

.reassurance {
  padding: var(--space-4xl) 0;
  background: var(--color-surface);
}

.reassurance h2 {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.reasons {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.reason {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.reason:first-child {
  border-top: 1px solid var(--color-border);
}

.reason dt {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.reason dd {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.9;
}


/* ========================================
   Final CTA
   ======================================== */

.cta-final {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
}

.cta-final-inner {
  max-width: var(--container-narrow);
  text-align: center;
}

.cta-final h2 {
  margin-bottom: var(--space-lg);
}

.cta-final p {
  color: var(--color-text-light);
  font-size: var(--text-base);
  line-height: 2;
  margin-bottom: var(--space-2xl);
}


/* ========================================
   Footer
   ======================================== */

.site-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}


/* ========================================
   Reveal animation
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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


/* ========================================
   Responsive
   ======================================== */

@media (max-width: 900px) {
  .hero {
    min-height: auto;
    padding-top: calc(60px + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .hero-visual {
    order: -1;
  }

  .hero-image {
    max-width: 340px;
    aspect-ratio: 5 / 4;
  }

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

  .hero-actions {
    justify-content: center;
  }

  .emotion-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .emotion-image {
    max-width: 320px;
    margin: 0 auto;
  }

  section h2 {
    font-size: var(--text-2xl);
  }
}

@media (max-width: 600px) {
  :root {
    --container-pad: 1.25rem;
  }

  .hero h1 {
    font-size: var(--text-2xl);
  }

  .hero-sub br {
    display: none;
  }

  .steps {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-lg);
    max-width: 100%;
  }

  .step-divider {
    width: 1px;
    height: 24px;
    margin-top: 0;
    margin-left: auto;
    margin-right: auto;
  }

  .step {
    width: 100%;
  }

  .step-desc {
    max-width: none;
  }

  .solution-body br {
    display: none;
  }

  .empathy h2 br,
  .solution h2 br,
  .emotion-text h2 br,
  .reassurance h2 br,
  .cta-final h2 br {
    display: none;
  }

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

  .emotion-list li {
    font-size: var(--text-base);
  }

  .btn-lg {
    padding: 0.875rem 2rem;
    font-size: var(--text-base);
  }
}