.site-header{
  position: sticky;
  top: 0;
  background: rgba(250,250,250,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px var(--space-4);
}
.brand{ display:flex; flex-direction:column; gap:2px; }
.brand__en{ font-weight:600; font-size:.98rem; letter-spacing:.02em; }
.brand__jp{ font-size:.78rem; color:var(--muted); }

.nav{ display:flex; gap:14px; align-items:center; }
.nav a{ font-size:.82rem; color:var(--muted); }
.nav a:hover{ color:var(--fg); text-decoration:none; }
.nav__cta{
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg) !important;
}

.hero{
  padding-top: var(--space-7);
  padding-bottom: var(--space-6);
}
.hero__lead{
  font-size: 1.06rem;
  margin: 0;
}
.hero__lead strong{ font-weight:600; }

.hero__sub{
  margin-top: var(--space-5);
  color: var(--fg);
  font-size: 1.02rem;
}

.grid{
  display:grid;
  gap: var(--space-4);
}
.card{
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background:#fff;
  box-shadow: var(--shadow);
  padding: var(--space-5);
}
.card__kicker{
  font-size:.78rem;
  color: var(--muted);
  letter-spacing:.08em;
}
.card__title{
  margin: 10px 0 6px;
  font-weight:600;
}
.card__text{
  margin: 0;
  color: var(--muted);
}
.btnrow{ display:flex; gap:10px; flex-wrap:wrap; margin-top: var(--space-4); }
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background:#fff;
}
.btn--primary{
  background:#111;
  color:#fff;
  border-color:#111;
}
.btn:hover{ text-decoration:none; opacity:.92; }

.media{
  border-radius: var(--r-2);
  overflow:hidden;
  border: 1px solid var(--line);
  background:#fff;
}
.media img{
  display:block;
  width:100%;
  height:auto;
}

.site-footer{
  margin-top: var(--space-7);
  border-top: 1px solid var(--line);
  padding: var(--space-6) 0;
  color: var(--muted);
}
.footer__grid{
  display:grid;
  gap: var(--space-5);
}
.footer__title{ color: var(--fg); font-weight:600; }
.footer__sub{ font-size:.9rem; margin-top: 2px; }
.footer__meta{ margin-top: 10px; font-size:.9rem; }
.footer__label{ color: var(--fg); font-weight:600; margin-bottom: 8px; }
.footer__link{ display:inline-block; color: var(--fg); }
.footer__hint{ font-size:.85rem; margin-top: 8px; }
.footer__fineprint{ margin-top: var(--space-5); font-size:.85rem; }

@media (max-width: 820px){
  .nav{ display:none; }
}

@media (min-width: 820px){
  .grid{ grid-template-columns: 1fr 1fr; }
  .footer__grid{ grid-template-columns: 1.2fr 1fr 1fr; }
}


/* --- Theme upgrade (dark gradient) --- */
.site-header{
  background: rgba(7,8,10,.55);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card__kicker{ color: var(--muted2); }
.card__title{ color: var(--text); }
.card__text{ color: var(--muted); }

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

.btn{
  background: rgba(243,241,236,.06);
  border: 1px solid var(--line);
  color: var(--text);
}
.btn--primary{
  background: rgba(240,161,74,.18);
  border-color: rgba(240,161,74,.35);
}

/* ===== Header fix: make text readable (light glass) ===== */
.site-header{
  background: rgba(246,244,239,.92) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(10,10,10,.10);
}

.brand__en{ color:#121212 !important; }
.brand__jp{ color: rgba(18,18,18,.60) !important; }

.nav a{ color: rgba(18,18,18,.62) !important; }
.nav a:hover{ color:#121212 !important; }

/* CTA button in nav */
.nav__cta{
  background: rgba(18,18,18,.04) !important;
  border: 1px solid rgba(18,18,18,.14) !important;
  color:#121212 !important;
}

/* Cards: keep clean but a bit warmer */
.card{
  background: rgba(255,255,255,.72) !important;
  border: 1px solid rgba(18,18,18,.10) !important;
  box-shadow: 0 18px 48px rgba(0,0,0,.08) !important;
}

/* ===== Mobile nav (hamburger) ===== */
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius: 999px;
  border: 1px solid rgba(18,18,18,.14);
  background: rgba(18,18,18,.04);
  align-items:center;
  justify-content:center;
  gap:5px;
}

.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  background: rgba(18,18,18,.78);
  border-radius: 2px;
}

/* mobile breakpoint */
@media (max-width: 820px){
  .nav-toggle{ display:inline-flex; }

  /* hide nav links by default, open on toggle */
  #site-nav{
    display:none;
    position:absolute;
    top: calc(100% + 10px);
    right: 16px;
    left: 16px;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(18,18,18,.12);
    border-radius: 16px;
    box-shadow: 0 18px 48px rgba(0,0,0,.12);
    padding: 10px;
  }
  #site-nav.is-open{ display:block; }

  #site-nav a{
    display:block;
    padding: 12px 12px;
    border-radius: 12px;
  }
  #site-nav a:hover{
    background: rgba(18,18,18,.05);
  }

  /* make header positioning safe for absolute nav */
  .site-header .container{ position:relative; }
}

/* ===== Fix hamburger layout: vertical 3 lines ===== */
.nav-toggle{
  display:none;
  flex-direction: column;   /* ★これで縦積み */
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span{
  width: 18px;
  height: 2px;
}

/* ===== Mobile nav FINAL override (wins last) ===== */
@media (max-width: 820px){
  .site-header .container{ position:relative; }

  /* hamburger: always visible on mobile */
  .nav-toggle{
    display:inline-flex !important;
    flex-direction: column !important;
    align-items:center !important;
    justify-content:center !important;
    width:44px !important;
    height:44px !important;
    gap:5px !important;
    border-radius:999px !important;
    border:1px solid rgba(18,18,18,.14) !important;
    background: rgba(18,18,18,.04) !important;
  }
  .nav-toggle span{
    display:block !important;
    width:18px !important;
    height:2px !important;
    background: rgba(18,18,18,.78) !important;
    border-radius:2px !important;
  }

  /* nav dropdown */
  #site-nav{
    display:none !important;
    position:absolute !important;
    top: calc(100% + 10px) !important;
    right: 16px !important;
    left: 16px !important;
    background: rgba(255,255,255,.94) !important;
    border: 1px solid rgba(18,18,18,.12) !important;
    border-radius: 16px !important;
    box-shadow: 0 18px 48px rgba(0,0,0,.12) !important;
    padding: 10px !important;
    z-index: 9999 !important;
  }
  #site-nav.is-open{ display:block !important; }

  #site-nav a{
    display:block !important;
    padding: 12px 12px !important;
    border-radius: 12px !important;
  }
  #site-nav a:hover{ background: rgba(18,18,18,.05) !important; }
}

/* ===== Cyber Glass UI ===== */

/* header (light glass on dark bg) */
.site-header{
  background: rgba(14,17,22,.78) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(120,180,255,.18);
}
.brand__en{ color:#f4f7fb !important; }
.brand__jp{ color: rgba(230,232,235,.60) !important; }
.nav a{ color: rgba(230,232,235,.70) !important; }
.nav a:hover{ color:#ffffff !important; }

/* cards */
.card{
  background: rgba(18,22,28,.82) !important;
  border: 1px solid rgba(120,180,255,.18) !important;
  box-shadow: 0 20px 60px rgba(0,0,0,.45) !important;
}
.card__kicker{ color: rgba(140,200,255,.85) !important; }

/* buttons */
.btn{
  background: rgba(255,255,255,.04) !important;
  border: 1px solid rgba(140,200,255,.28) !important;
  color:#f4f7fb !important;
}
.btn:hover{
  background: rgba(140,200,255,.12) !important;
}

/* primary CTA = body temperature */
.btn--primary{
  background: linear-gradient(135deg, #f2c6b6, #e7b7a5) !important;
  color:#1a1a1a !important;
  border:none !important;
}

/* ===== Media / SVG glow tuning ===== */
.media img{
  filter:
    drop-shadow(0 10px 30px rgba(120,200,255,.20))
    drop-shadow(0 2px 10px rgba(255,255,255,.08));
  opacity: .98;
}

/* Card inner border a bit more "silver" */
.card{
  border-color: rgba(200,210,225,.14) !important;
}

/* ===== Mobile hamburger color unify (cyber blue / silver) ===== */
.nav-toggle span{
  background: linear-gradient(
    180deg,
    #d6e6f5 0%,
    #9fc8eb 100%
  );
  box-shadow:
    0 0 6px rgba(120,200,255,.45),
    0 0 12px rgba(120,200,255,.25);
}

/* hover / active feedback */
.nav-toggle:hover span,
.nav-toggle[aria-expanded="true"] span{
  background: #b9ddff;
  box-shadow:
    0 0 10px rgba(140,220,255,.75),
    0 0 18px rgba(140,220,255,.45);
}

/* ===== Force hamburger line color (override everything) ===== */
button.nav-toggle > span{
  display:block !important;
  background: #b9ddff !important;
  box-shadow: 0 0 10px rgba(140,220,255,.55) !important;
}

/* if lines are made by borders (just in case) */
button.nav-toggle > span{
  border-color: #b9ddff !important;
}

/* make the button itself match the theme */
button.nav-toggle{
  color: #b9ddff !important;
  border-color: rgba(140,220,255,.35) !important;
}

/* ===== Hamburger FINAL: cyber-blue (visible, not-white) ===== */
button.nav-toggle{
  background: rgba(14,17,22,.55) !important;
  border: 1px solid rgba(127,200,255,.55) !important;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.06) inset,
    0 10px 30px rgba(0,0,0,.35) !important;
}

/* the 3 lines */
button.nav-toggle > span{
  background: #7fc8ff !important;  /* ← ここが決定打（白じゃない） */
  box-shadow:
    0 0 8px rgba(127,200,255,.55),
    0 0 16px rgba(127,200,255,.25) !important;
}

/* hover / open */
button.nav-toggle:hover,
button.nav-toggle[aria-expanded="true"]{
  border-color: rgba(160,220,255,.75) !important;
}
button.nav-toggle:hover > span,
button.nav-toggle[aria-expanded="true"] > span{
  background: #a7ddff !important;
  box-shadow:
    0 0 10px rgba(160,220,255,.75),
    0 0 20px rgba(160,220,255,.40) !important;
}

/* ===== Hamburger HARD OVERRIDE (kill white shadow/filter) ===== */
button.nav-toggle{
  filter: none !important;
  mix-blend-mode: normal !important;
}

button.nav-toggle > span{
  background: #7fc8ff !important;
  background-image: none !important;
  box-shadow: none !important;          /* ← 白い線の元がここなことが多い */
  border: none !important;
  opacity: 1 !important;
}

/* in case hamburger uses pseudo elements */
button.nav-toggle::before,
button.nav-toggle::after{
  content: "" !important;
  display: none !important;             /* ← 疑似要素で線描いてる場合は殺す */
  background: #7fc8ff !important;
  box-shadow: none !important;
  filter: none !important;
}

/* ===== Hamburger BORDER MODE (absolute reliable) ===== */
button.nav-toggle > span{
  height: 0 !important;
  background: transparent !important;
  border-top: 2px solid #7fc8ff !important;
  box-shadow: 0 0 8px rgba(127,200,255,.55) !important;
}

/* ===== MOBILE hamburger: force saturated cyan (must look blue) ===== */
@media (max-width: 820px){
  header.site-header button.nav-toggle > span{
    height: 3px !important;
    background: #00B7FF !important;          /* ← 白にならない濃いサイバー青 */
    background-image: none !important;
    box-shadow: 0 0 10px rgba(0,183,255,.65) !important;
  }
}

  header.site-header button.nav-toggle > span{
    outline: 3px solid #00ff66 !important;  /* ← spanが見えてるなら緑枠が出る */
    background: #00B7FF !important;
  }
  header.site-header button.nav-toggle::before,
  header.site-header button.nav-toggle::after{
    outline: 3px solid #ffee00 !important;  /* ← 疑似要素なら黄枠が出る */
  }
}

/* ===== Mobile dropdown (site-nav) : cyber dark glass ===== */
@media (max-width: 820px){
  #site-nav{
    background: rgba(14,17,22,.96) !important;
    border: 1px solid rgba(120,180,255,.22) !important;
    box-shadow: 0 24px 70px rgba(0,0,0,.55) !important;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
  #site-nav a{
    color: rgba(240,246,255,.82) !important;
  }
  #site-nav a:hover{
    background: rgba(120,180,255,.12) !important;
    color: #ffffff !important;
  }
  #site-nav .nav__cta{
    background: rgba(255,255,255,.06) !important;
    border: 1px solid rgba(140,200,255,.32) !important;
    color: #f4f7fb !important;
  }
}

/* ===== Mobile menu panel: force dark glass (nav + #site-nav both) ===== */
@media (max-width: 820px){
  header.site-header nav.nav,
  header.site-header nav#site-nav,
  header.site-header #site-nav{
    background: rgba(14,17,22,.96) !important;
    border: 1px solid rgba(120,180,255,.22) !important;
    box-shadow: 0 24px 70px rgba(0,0,0,.55) !important;
    backdrop-filter: blur(14px) !important;
    -webkit-backdrop-filter: blur(14px) !important;
  }

  header.site-header nav.nav a,
  header.site-header #site-nav a{
    color: rgba(240,246,255,.86) !important;
  }
  header.site-header nav.nav a:hover,
  header.site-header #site-nav a:hover{
    background: rgba(120,180,255,.12) !important;
    color: #fff !important;
  }

  header.site-header nav.nav .nav__cta,
  header.site-header #site-nav .nav__cta{
    background: rgba(255,255,255,.06) !important;
    border: 1px solid rgba(140,200,255,.32) !important;
    color: #f4f7fb !important;
  }
}

/* ===== FINAL: Hamburger lines to white/silver (not green) ===== */
@media (max-width: 820px){
  button.nav-toggle > span{
    background: linear-gradient(
      180deg,
      #ffffff 0%,
      #dfe6ee 100%
    ) !important;
    box-shadow:
      0 0 6px rgba(255,255,255,.55),
      0 0 12px rgba(180,200,220,.35) !important;
  }

  /* hover / open state */
  button.nav-toggle:hover > span,
  button.nav-toggle[aria-expanded="true"] > span{
    background: #ffffff !important;
    box-shadow:
      0 0 10px rgba(255,255,255,.75),
      0 0 18px rgba(200,220,240,.45) !important;
  }
}

/* ===== FINAL: Hamburger lines to white/silver (not green) ===== */
@media (max-width: 820px){
  button.nav-toggle > span{
    background: linear-gradient(
      180deg,
      #ffffff 0%,
      #dfe6ee 100%
    ) !important;
    box-shadow:
      0 0 6px rgba(255,255,255,.55),
      0 0 12px rgba(180,200,220,.35) !important;
  }

  /* hover / open state */
  button.nav-toggle:hover > span,
  button.nav-toggle[aria-expanded="true"] > span{
    background: #ffffff !important;
    box-shadow:
      0 0 10px rgba(255,255,255,.75),
      0 0 18px rgba(200,220,240,.45) !important;
  }
}

/* ===== KILL GREEN GLOW: absolute final override ===== */
@media (max-width: 820px){

  /* ボタン本体 */
  button.nav-toggle{
    background: rgba(14,17,22,.65) !important;
    border: 1px solid rgba(200,210,225,.45) !important;
    box-shadow: none !important;
    filter: none !important;
    mix-blend-mode: normal !important;
  }

  /* span（3本線） */
  button.nav-toggle > span{
    background: #ffffff !important;
    background-image: none !important;
    box-shadow: none !important;
    filter: none !important;
  }

  /* 疑似要素がいたら即消す */
  button.nav-toggle::before,
  button.nav-toggle::after,
  button.nav-toggle span::before,
  button.nav-toggle span::after{
    content: none !important;
    display: none !important;
    box-shadow: none !important;
    filter: none !important;
  }
}

/* ===== ABSOLUTE LAST OVERRIDE: hamburger lines must be WHITE ===== */
html body header.site-header button.nav-toggle > span{
  background: #ffffff !important;
  background-image: none !important;
  box-shadow: none !important;
  filter: none !important;
}
html body header.site-header button.nav-toggle:hover > span,
html body header.site-header button.nav-toggle[aria-expanded="true"] > span{
  background: #ffffff !important;
  box-shadow: none !important;
}

/* ===== ABSOLUTE LAST OVERRIDE: hamburger lines must be WHITE ===== */
html body header.site-header button.nav-toggle > span{
  background: #ffffff !important;
  background-image: none !important;
  box-shadow: none !important;
  filter: none !important;
}
html body header.site-header button.nav-toggle:hover > span,
html body header.site-header button.nav-toggle[aria-expanded="true"] > span{
  background: #ffffff !important;
  box-shadow: none !important;
}

/* ===== KILL ALL green: nav-toggle ring / outline / glow ===== */
header.site-header .nav-toggle{
  outline: none !important;
  box-shadow: none !important;
  border-color: rgba(127,200,255,.45) !important; /* 控えめ */
}

header.site-header .nav-toggle:focus,
header.site-header .nav-toggle:focus-visible,
header.site-header .nav-toggle:active{
  outline: none !important;
  box-shadow: none !important;
}

/* iOS/Chrome tap highlight kill */
header.site-header .nav-toggle{
  -webkit-tap-highlight-color: transparent !important;
}