/* =========================================================
   GAW — Shared site chrome (header / footer / buttons / blocks)
   ========================================================= */

/* ---------- Header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,4vw,52px);
  transition:background .35s ease,box-shadow .35s ease,padding .35s ease;}
.site-header.solid{background:rgba(251,252,254,.92);backdrop-filter:blur(10px);
  box-shadow:0 1px 0 var(--line);padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-disp);
  font-weight:700;letter-spacing:.14em;font-size:19px;color:#fff;transition:color .35s;white-space:nowrap}
.brand .sq{width:13px;height:13px;background:var(--accent);transform:rotate(45deg);flex:none}
.brand em{font-style:normal;color:var(--accent)}
.site-header.solid .brand{color:var(--ink)}
.brand--logo{padding:0}
.site-header .brand--logo img{height:46px;width:auto;display:block}
.nav{display:flex;align-items:center;gap:clamp(14px,2vw,30px)}
.nav a{font-size:13.5px;font-weight:700;color:rgba(255,255,255,.86);letter-spacing:.04em;
  position:relative;padding:4px 6px;transition:color .25s;white-space:nowrap}
.nav a .en{display:block;font-family:var(--font-disp);font-weight:500;font-size:9px;
  letter-spacing:.22em;color:var(--accent);text-transform:uppercase;margin-bottom:1px}
.site-header.solid .nav a{color:var(--ink)}
.nav a:not(.btn):hover{color:var(--accent)}
.site-header.solid .nav a:not(.btn):hover{color:var(--blue)}

/* 外部リンク（SAIZ など別サイトへ遷移する項目）
   アイコンは currentColor 追従なので、透明ヘッダー（白文字）／solid（濃色）
   ／スマホパネル（白文字）のすべてで自動的に色が合います */
.nav a.nav__external .ext-icon{display:inline-block;width:.72em;height:.72em;
  margin-left:.4em;vertical-align:baseline;background:currentColor;opacity:.5;
  transition:opacity .25s;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E") center/contain no-repeat}
.nav a.nav__external:hover .ext-icon{opacity:1}

.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-jp);font-weight:700;
  font-size:13.5px;letter-spacing:.03em;padding:11px 22px;border-radius:var(--r);
  background:var(--accent);color:#fff !important;transition:transform .2s,background .2s,box-shadow .2s;
  box-shadow:0 8px 20px -8px rgba(242,106,27,.6)}
.btn .en{color:rgba(255,255,255,.85) !important}
.btn:hover{background:var(--accent-deep);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:#fff !important;border:1px solid rgba(255,255,255,.35);box-shadow:none}
.btn--ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn--blue{background:var(--blue);box-shadow:0 8px 22px -8px rgba(17,159,230,.7)}
.btn--blue:hover{background:#0d7fc0}
.btn--lg{padding:16px 34px;font-size:15px}
/* ghost ボタンは白文字前提。明るい block--ink / block--tint 上では濃色にして視認性を確保 */
.block--ink .btn--ghost,.block--tint .btn--ghost{color:var(--ink)!important;border-color:rgba(14,41,75,.3)}
.block--ink .btn--ghost .en,.block--tint .btn--ghost .en{color:var(--blue)!important}
.block--ink .btn--ghost:hover,.block--tint .btn--ghost:hover{background:rgba(14,41,75,.06);border-color:var(--ink)}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:26px;height:2px;background:#fff;transition:.3s}
.site-header.solid .nav-toggle span{background:var(--ink)}

/* Sub-pages (light .page-hero): force readable white header chrome */
body:has(.page-hero) .site-header{background:rgba(251,252,254,.92)!important;backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line);padding-top:12px;padding-bottom:12px}
body:has(.page-hero) .site-header .brand{color:var(--ink)!important}
body:has(.page-hero) .site-header .nav-toggle span{background:var(--ink)!important}
@media(min-width:861px){
  body:has(.page-hero) .site-header .nav a{color:var(--ink)!important}
  body:has(.page-hero) .site-header .nav a:not(.btn):hover{color:var(--blue)!important}
  body:has(.page-hero) .site-header .nav a.btn{color:#fff!important}
}

/* scrim sits behind the mobile panel; fully hidden on desktop */
.nav-scrim{display:none}

@media(max-width:860px){
  .nav{position:fixed;top:0;right:0;bottom:0;height:100dvh;width:min(84vw,330px);
    background:var(--navy);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:calc(env(safe-area-inset-top) + 88px) 30px calc(env(safe-area-inset-bottom) + 40px);
    overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;
    transform:translateX(100%);transition:transform .4s cubic-bezier(.7,0,.2,1);
    z-index:60;box-shadow:-22px 0 60px -24px rgba(5,12,24,.55)}
  .nav.open{transform:translateX(0)}
  .nav a,.site-header.solid .nav a{color:#fff;font-size:17px;white-space:normal;
    padding:15px 2px;border-bottom:1px solid rgba(255,255,255,.09)}
  .nav a .en{font-size:9.5px;margin-bottom:3px}
  .nav a:not(.btn):hover,.site-header.solid .nav a:not(.btn):hover{color:var(--accent)}
  .nav .btn{margin-top:22px;width:100%;justify-content:center;
    font-size:16px;padding:15px 22px;border-bottom:0}
  .nav-toggle{display:flex;z-index:70}
  .nav-toggle.open span{background:#fff}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  body.nav-open{overflow:hidden}
  .nav-scrim{display:block;position:fixed;inset:0;z-index:45;background:rgba(6,14,28,.5);
    opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease}
  body.nav-open .nav-scrim{opacity:1;visibility:visible}
}

/* ---------- Generic section scaffolding ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
.block{padding:clamp(64px,9vw,120px) 0}
.block--tint{background:var(--paper-2)}
.block--sky{background:linear-gradient(180deg,var(--sky-soft),var(--paper))}
.block--ink{background:linear-gradient(180deg,#E8F6FD,#CFEAF8);color:var(--ink)}
.sec-kicker{display:inline-flex;align-items:center;gap:12px;font-family:var(--font-disp);
  font-weight:600;letter-spacing:.26em;text-transform:uppercase;font-size:12px;color:var(--blue)}
.sec-kicker::before{content:"";width:30px;height:2px;background:var(--accent)}
.block--ink .sec-kicker{color:var(--blue)}
.sec-title{font-family:var(--font-jp);font-weight:900;letter-spacing:.02em;
  font-size:clamp(25px,3.6vw,38px);line-height:1.28;margin:18px 0 0}
.sec-title .accent{color:var(--blue)}
.block--ink .sec-title .accent{color:var(--blue)}
.sec-sub{color:var(--muted);max-width:62ch;margin:18px 0 0;font-size:15.5px;line-height:1.9}
.block--ink .sec-sub{color:var(--muted)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#fff;padding:72px 0 36px}
.foot-cta{background:
    radial-gradient(120% 160% at 85% 0,#1a3f74 0,transparent 55%),var(--navy);
  border-radius:6px;padding:clamp(34px,5vw,58px);display:flex;flex-wrap:wrap;gap:26px;
  align-items:center;justify-content:space-between;position:relative;overflow:hidden}
.foot-cta::after{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,#ffffff08 0 1px,transparent 1px 60px)}
.foot-cta>*{position:relative;z-index:1}
.foot-cta h3{font-family:var(--font-jp);font-weight:900;font-size:clamp(22px,3vw,32px);margin:0;line-height:1.3}
.foot-cta p{color:#B9CBE0;margin:10px 0 0;font-size:14.5px}
.foot-main{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-top:64px}
.foot-brand .brand{color:#fff;font-size:24px}
.foot-brand .brand--logo{display:inline-block;padding:0}
.foot-brand .brand--logo img{display:block;width:clamp(220px,17vw,272px);height:auto;filter:brightness(0) invert(1)}
.foot-brand .brand--saiz img{width:clamp(170px,14vw,212px)}
.foot-brand p{color:#8FA3BC;font-size:13px;line-height:1.9;margin:18px 0 0;max-width:34ch}
.foot-col h5{font-family:var(--font-disp);letter-spacing:.2em;font-size:11px;color:var(--accent);
  text-transform:uppercase;margin:0 0 16px}
.foot-col a{display:block;color:#C3D2E4;font-size:14px;padding:7px 0;transition:color .2s}
.foot-col a:hover{color:#fff}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  margin-top:54px;padding-top:24px;border-top:1px solid #ffffff1a;
  font-family:var(--font-mono);font-size:11.5px;color:#6F84A0;letter-spacing:.04em}
@media(max-width:760px){.foot-main{grid-template-columns:1fr 1fr;gap:30px}.foot-brand{grid-column:1/-1}}

/* ---------- Buttons row util ---------- */
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

/* ---------- Sub-page hero banner ---------- */
.page-hero{position:relative;background:
    radial-gradient(120% 150% at 88% 0,rgba(17,159,230,.16) 0,transparent 52%),
    linear-gradient(180deg,#E8F6FD,#CFEAF8);
  color:var(--ink);padding:148px 0 60px;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(14,41,75,.05) 0 1px,transparent 1px 64px)}
.page-hero .wrap{position:relative;z-index:1}
.crumb{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--steel);display:flex;gap:9px;align-items:center}
.crumb a{color:var(--steel);transition:color .2s}.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.5}
.page-hero h1{font-family:var(--font-jp);font-weight:900;font-size:clamp(30px,5vw,56px);
  line-height:1.16;margin:20px 0 0;letter-spacing:.02em}
.page-hero .en{font-family:var(--font-disp);font-weight:600;letter-spacing:.28em;font-size:13px;
  color:var(--accent);text-transform:uppercase;display:block;margin-top:14px}
.page-hero p{color:var(--muted);max-width:60ch;margin:20px 0 0;font-size:15.5px;line-height:1.9}
.page-hero .big-ghost{position:absolute;right:clamp(10px,3vw,40px);bottom:-18px;z-index:0;
  font-family:var(--font-disp);font-weight:700;font-size:clamp(90px,18vw,230px);line-height:.8;
  color:#0e294b0d;letter-spacing:.02em;pointer-events:none;text-transform:uppercase}

/* ---------- Utilities ---------- */
/* Screen reader only（外部リンクの「（外部サイト）」補足などに使用） */
.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}