/* ----------------------------------------------------------------
   RBFJ — landing page
   Editorial / confessional. Serifs, hairlines, no marketing tropes.
---------------------------------------------------------------- */

:root{
  /* Ink */
  --ink:        #0F1B2D;
  --char:       #1F2937;
  --muted:      #5B5751;

  /* Ground */
  --paper:      #FAF7F1;
  --parch:      #F4EFE6;
  --stone:      #D7CFC0;

  /* Accent */
  --gold:       #A8854A;
  --gold-deep:  #8A6B36;

  /* Ceremonial — only inside the mark */
  --seal:       #8B2E2A;

  /* Hairlines */
  --hair:       rgba(15,27,45,.18);
  --hair-soft:  rgba(15,27,45,.10);

  /* Layout */
  --prose:      640px;
  --gutter:     clamp(20px, 4vw, 56px);
  --section:    clamp(56px, 8vw, 104px);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body{
  background: var(--paper);
  color: var(--ink);
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "liga","onum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* JP body type */
body[data-lang="jp"]{
  font-family: 'Noto Serif JP', 'EB Garamond', serif;
  font-size: 16px;
  line-height: 1.85;
}

/* Skip link */
.skip{
  position: absolute; left: -9999px;
  width: 1px; height: 1px; overflow: hidden;
}
.skip:focus{
  left: var(--gutter); top: 10px; width: auto; height: auto;
  background: var(--ink); color: var(--parch);
  padding: 8px 14px;
  font-family: 'Inter', sans-serif; font-size: 12px;
  letter-spacing: .22em; text-transform: uppercase;
  z-index: 100;
}

/* ----------------------------------------------------------------
   Language toggle — fixed top-right
---------------------------------------------------------------- */
.lang-toggle{
  position: fixed;
  top: clamp(16px, 2.5vw, 28px);
  right: clamp(16px, 2.5vw, 28px);
  display: inline-flex; align-items: center; gap: 10px;
  z-index: 20;
  background: rgba(250,247,241,.78);
  backdrop-filter: blur(6px);
  padding: 6px 10px;
  border: 1px solid var(--hair-soft);
}
.lang-btn{
  background: transparent; border: 0; padding: 2px 2px;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px; letter-spacing: .22em; font-weight: 600;
  color: var(--muted); cursor: pointer;
  transition: color 160ms ease;
}
.lang-btn:hover { color: var(--ink); }
.lang-btn.is-active { color: var(--ink); }
.lang-btn[data-lang="jp"]{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .12em;
}
.lang-divider{
  color: var(--stone);
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  user-select: none;
}

/* ----------------------------------------------------------------
   Page shell
---------------------------------------------------------------- */
.page{
  max-width: var(--prose);
  margin: 0 auto;
  padding: clamp(72px, 11vw, 120px) var(--gutter) 0;
}

/* Common bits */
.eyebrow{
  display: inline-block;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold-deep);
  font-weight: 600;
}
body[data-lang="jp"] .eyebrow{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .18em;
  font-size: 12px;
}
.gold-rule{
  display: block; height: 1px; width: 48px;
  background: var(--gold); border: 0;
  margin: 18px 0 24px;
}

/* ----------------------------------------------------------------
   Mark + wordmark
---------------------------------------------------------------- */
.mark{
  text-align: center;
  margin: 0 0 var(--section);
}
.mark-img{
  display: block;
  width: clamp(160px, 22vw, 220px);
  height: auto;
  margin: 0 auto 22px;
  user-select: none;
}
.wordmark{
  margin: 0 0 6px;
  display: flex; flex-direction: column;
  gap: 4px;
  line-height: 1;
}
.wordmark-l1{
  font-family: 'EB Garamond', serif;
  font-weight: 500;
  font-size: clamp(13px, 1.6vw, 15px);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink);
}
.wordmark-l2{
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: clamp(15px, 1.8vw, 18px);
  color: var(--seal);
}
body[data-lang="jp"] .wordmark-l1{
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  letter-spacing: .12em;
}
body[data-lang="jp"] .wordmark-l2{
  font-family: 'Noto Serif JP', serif;
  font-style: normal;
  font-weight: 500;
  letter-spacing: .04em;
}
.mark .gold-rule{
  margin-left: auto; margin-right: auto;
  margin-top: 20px;
}

/* ----------------------------------------------------------------
   Intro
---------------------------------------------------------------- */
.intro{
  text-align: center;
  margin: 0 0 var(--section);
}
.intro-title{
  font-family: 'Cormorant Garamond', serif;
  font-weight: 400;
  font-size: clamp(1.625rem, 3.6vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -.005em;
  color: var(--ink);
  margin: 0 0 24px;
  max-width: 28ch;
  margin-inline: auto;
}
body[data-lang="jp"] .intro-title{
  font-family: 'Noto Serif JP', serif;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0;
  font-size: clamp(1.375rem, 3vw, 1.875rem);
}
.intro-title-accent{
  color: var(--seal);
}
.intro-body{
  font-family: 'EB Garamond', serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--char);
  margin: 0 auto;
  max-width: 56ch;
}
body[data-lang="jp"] .intro-body{
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9375rem;
  line-height: 1.95;
}

/* ----------------------------------------------------------------
   Pillars
---------------------------------------------------------------- */
.pillars{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin: 0 0 var(--section);
  padding-top: 32px;
  border-top: 1px solid var(--hair);
}
.pillar{
  display: flex; flex-direction: column;
}
.pillar-num{
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 14px;
  color: var(--gold-deep);
  margin-bottom: 8px;
}
.pillar-h{
  font-family: 'EB Garamond', serif;
  font-weight: 500;
  font-size: 1.0625rem;
  letter-spacing: .01em;
  color: var(--ink);
  margin: 0 0 6px;
}
body[data-lang="jp"] .pillar-h{
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 1rem;
}
.pillar-p{
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--char);
  margin: 0;
}
body[data-lang="jp"] .pillar-p{
  font-family: 'Noto Serif JP', serif;
  font-size: 0.875rem;
  line-height: 1.85;
}

/* ----------------------------------------------------------------
   Involve / form
---------------------------------------------------------------- */
.involve{
  padding-top: 40px;
  border-top: 1px solid var(--hair);
  margin: 0 0 var(--section);
}
.involve-title{
  font-family: 'Cormorant Garamond', serif;
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  line-height: 1.2;
  letter-spacing: -.005em;
  color: var(--ink);
  margin: 12px 0 0;
}
body[data-lang="jp"] .involve-title{
  font-family: 'Noto Serif JP', serif;
  font-weight: 500;
  letter-spacing: 0;
}
.involve-lede{
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--char);
  max-width: 52ch;
  margin: 4px 0 36px;
}
body[data-lang="jp"] .involve-lede{
  font-family: 'Noto Serif JP', serif;
  font-style: normal;
  font-size: 0.9375rem;
  line-height: 1.9;
}

/* Tabs */
.tabs{
  display: flex; gap: 28px;
  border-bottom: 1px solid var(--hair);
  margin-bottom: 32px;
}
.tab{
  background: transparent;
  border: 0;
  padding: 0 0 12px;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  margin-bottom: -1px;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-bottom-color 160ms ease;
}
.tab:hover{ color: var(--ink); }
.tab.is-active{
  color: var(--ink);
  border-bottom-color: var(--gold);
}
body[data-lang="jp"] .tab{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .14em;
  font-size: 12px;
}

/* Form */
.form{
  display: flex; flex-direction: column;
  gap: 22px;
}
.form[hidden]{ display: none; }

.field{
  display: flex; flex-direction: column;
  gap: 8px;
}
.field label,
.field--radio legend{
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--gold-deep);
  padding: 0;
}
body[data-lang="jp"] .field label,
body[data-lang="jp"] .field--radio legend{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .12em;
  font-size: 12px;
}
.opt{
  color: var(--muted);
  font-weight: 500;
  text-transform: none;
  letter-spacing: .04em;
  margin-left: 6px;
}

.field input[type="text"],
.field input[type="email"],
.field textarea{
  background: var(--paper);
  border: 1px solid var(--hair);
  padding: 12px 14px;
  font-family: 'EB Garamond', serif;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
  border-radius: 0;
  outline: none;
  transition: border-color 160ms ease;
  -webkit-appearance: none;
}
body[data-lang="jp"] .field input[type="text"],
body[data-lang="jp"] .field input[type="email"],
body[data-lang="jp"] .field textarea{
  font-family: 'Noto Serif JP', 'EB Garamond', serif;
  font-size: 16px;
}
.field input::placeholder,
.field textarea::placeholder{
  color: var(--muted);
  opacity: .65;
  font-style: italic;
}
.field input:focus-visible,
.field textarea:focus-visible{
  border-color: var(--gold);
}
.field textarea{
  resize: vertical;
  min-height: 96px;
}
.field-hint{
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}
body[data-lang="jp"] .field-hint{
  font-family: 'Noto Serif JP', serif;
  font-style: normal;
  font-size: 13px;
}

/* Radio group */
.field--radio{
  border: 0; padding: 0; margin: 0;
}
.field--radio legend{
  margin-bottom: 10px;
}
.radio{
  display: inline-flex; align-items: center;
  gap: 8px;
  margin-right: 22px;
  font-family: 'EB Garamond', serif;
  font-size: 17px;
  color: var(--ink);
  cursor: pointer;
}
.radio input[type="radio"]{
  appearance: none;
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border: 1px solid var(--hair);
  background: var(--paper);
  border-radius: 50%;
  margin: 0;
  cursor: pointer;
  position: relative;
  transition: border-color 160ms ease;
}
.radio input[type="radio"]:checked{
  border-color: var(--ink);
}
.radio input[type="radio"]:checked::after{
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--ink);
  border-radius: 50%;
}
.radio input[type="radio"]:focus-visible{
  border-color: var(--gold);
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* Submit */
.form-foot{
  display: flex; flex-direction: column;
  gap: 14px;
  margin-top: 6px;
}
.submit{
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: 14px;
  background: var(--ink);
  color: var(--parch);
  border: 1px solid var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 14px 22px;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.submit:hover{
  background: #000;
}
.submit:focus-visible{
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.submit:disabled{
  opacity: .5; cursor: default;
}
.submit .arrow{
  font-family: 'EB Garamond', serif;
  font-size: 16px;
  letter-spacing: 0;
  line-height: 1;
}
body[data-lang="jp"] .submit{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .14em;
  font-size: 12px;
}
.status{
  margin: 0;
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 15px;
  color: var(--char);
  max-width: 56ch;
}
.status.is-error{ color: var(--seal); }
body[data-lang="jp"] .status{
  font-family: 'Noto Serif JP', serif;
  font-style: normal;
  font-size: 14px;
}

/* ----------------------------------------------------------------
   Footer
---------------------------------------------------------------- */
.site-footer{
  border-top: 1px solid var(--hair);
  background: var(--parch);
  padding: 40px var(--gutter) 32px;
  margin-top: var(--section);
}
.footer-row{
  max-width: var(--prose);
  margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px; flex-wrap: wrap;
}
.footer-email{
  font-family: 'EB Garamond', serif;
  font-size: 16px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.footer-email:hover{ border-bottom-color: var(--gold); }
.footer-kanji{
  font-family: 'Noto Serif JP', serif;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--char);
}
.footer-sdg{
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 16px;
  letter-spacing: .03em;
  color: var(--ink);
}
.footer-baseline{
  max-width: var(--prose);
  margin: 28px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  font-family: 'Inter', sans-serif;
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
}
.footer-powered{
  display: inline-flex; align-items: center; gap: 10px;
}
.akari-mark{
  font-family: 'Unbounded', system-ui, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
  text-decoration: none;
}
.akari-mark .amp{
  font-weight: 400;
  margin: 0 0.04em;
}
.akari-mark:hover{ color: var(--gold-deep); }

body[data-lang="jp"] .footer-powered{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .12em;
}
body[data-lang="jp"] .footer-baseline{
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  letter-spacing: .12em;
}

/* ----------------------------------------------------------------
   Responsive
---------------------------------------------------------------- */
@media (max-width: 720px){
  .pillars{
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-row{
    flex-direction: column; align-items: flex-start;
    gap: 10px;
  }
  .footer-baseline{
    flex-direction: column; align-items: flex-start;
    gap: 10px;
  }
  .tabs{ gap: 22px; }
}

@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; animation: none !important; }
}

@media print{
  .lang-toggle, .skip, .tabs, .form-foot{ display: none; }
  body{ background: #fff; color: #000; }
  .site-footer{ background: #fff; }
}