/**
 * nav.css — XiADEN ヘッダー・ナビゲーション
 * 元ファイル: company_top_D4_28_fresh.html <style> lines 217-413 + D-4.28 override (1604-2048)
 */

/* =============================================================
   HEADER / NAVIGATION (Base)
   ============================================================= */
.nav-header {
  position:sticky; top:0; z-index:200;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(196,220,244,.5);
  box-shadow:0 1px 8px rgba(29,58,90,.06);
  height:var(--nav-h);
}
.nav-inner {
  max-width:1200px; margin:0 auto; padding:0 40px;
  height:100%; display:flex; align-items:center; gap:28px;
}

/* Logo */
.nav-logo {
  display:flex; flex-direction:column;
  align-items:flex-start; gap:1px;
  flex-shrink:0; text-decoration:none;
  line-height:1;
}
.nav-logo-img,
.nav-logo-img-full {
  height:28px; width:auto; display:block;
  filter:brightness(0.52) contrast(1.3) saturate(0);
  margin-bottom:2px;
}
.logo-text { display:flex; flex-direction:column; gap:1px; }
.logo-name { font-size:20px; font-weight:900; color:#1d3a5a; letter-spacing:.04em; line-height:1; }
.logo-sub  { display:none; }
.nav-logo-tagline {
  font-size:10.5px; font-weight:600; color:#6680a0;
  letter-spacing:.02em; white-space:nowrap; display:block;
}

/* Nav Menu */
.nav-menu {
  display:flex; align-items:center; gap:22px; flex:1;
}
.nav-link {
  font-size:14px; font-weight:600; color:#3a5470;
  white-space:nowrap; padding:4px 0;
  border-bottom:2px solid transparent;
  display:inline-flex; align-items:center; gap:3px;
  text-decoration:none;
  transition:color .15s, border-color .15s;
}
.nav-link:hover          { color:#1d3a5a; border-bottom-color:#e8780c; }
.nav-link.is-active      { color:#1d3a5a; border-bottom-color:#e8780c; }

/* Nav Actions */
.nav-actions { display:flex; align-items:center; gap:14px; flex-shrink:0; }
.nav-tel { display:flex; flex-direction:column; align-items:flex-end; }
.nav-tel-label { font-size:10px; color:#6680a0; font-weight:600; letter-spacing:.05em; line-height:1.3; }
.nav-tel-num   { font-size:16px; font-weight:900; color:#1d3a5a; letter-spacing:.02em; line-height:1.1; }
.nav-cta {
  display:inline-flex; align-items:center; gap:7px;
  background:#e8780c; color:#fff;
  font-size:13px; font-weight:700; padding:10px 18px;
  border-radius:999px;
  box-shadow:0 3px 12px rgba(232,120,12,.30);
  text-decoration:none; white-space:nowrap;
  transition:filter .15s, transform .15s;
}
.nav-cta:hover { filter:brightness(1.08); transform:translateY(-1px); }

/* Burger (SP) */
.nav-burger {
  display:none; width:40px; height:40px;
  align-items:center; justify-content:center;
  border-radius:var(--r1); color:var(--n); flex-shrink:0;
  transition:background .15s;
}
.nav-burger:hover { background:var(--b); }

/* Mobile Drawer */
.nav-drawer {
  display:none; position:fixed; inset:0; z-index:190;
  background:rgba(15,32,53,.6); backdrop-filter:blur(4px);
}
.nav-drawer.open { display:block; }
.nav-drawer-panel {
  position:absolute; top:var(--nav-h); right:0; bottom:0;
  width:min(320px,90vw);
  background:var(--w); padding:var(--sp24);
  display:flex; flex-direction:column; gap:var(--sp8);
  box-shadow:var(--s3); overflow-y:auto;
}
.nav-drawer-link {
  display:block; padding:14px var(--sp16);
  font-size:15px; font-weight:600; color:var(--txm);
  border-radius:var(--r2); border-bottom:1px solid var(--div);
  transition:background .15s, color .15s;
}
.nav-drawer-link:hover { background:var(--b); color:var(--n); }
.nav-drawer-cta {
  display:block; margin-top:var(--sp8); padding:16px;
  background:var(--or); color:var(--w); font-size:15px; font-weight:700;
  text-align:center; border-radius:var(--rf);
  box-shadow:0 4px 16px rgba(232,120,12,.36);
}

/* =============================================================
   SP FIXED CTA BAR (768px以下のみ表示)
   ============================================================= */
.sp-cta-bar {
  display:none; position:fixed; bottom:0; left:0; right:0; z-index:300;
  padding-bottom:env(safe-area-inset-bottom);
  border-top:1px solid var(--bm); box-shadow:0 -4px 20px rgba(29,58,90,.12);
}
.sp-cta-inner { display:grid; grid-template-columns:1fr 1fr; height:62px; }
.sp-cta-tel,
.sp-cta-web {
  display:flex; align-items:center; justify-content:center; gap:8px;
  font-size:14px; font-weight:700; color:var(--w);
}
.sp-cta-tel { background:var(--or); }
.sp-cta-web { background:var(--n); }
.sp-cta-tel:focus-visible,
.sp-cta-web:focus-visible { outline:3px solid var(--or); outline-offset:2px; }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width:1024px) {
  .nav-inner { padding:0 24px; gap:20px; }
  .nav-link  { font-size:13px; }
}
@media (max-width:768px) {
  .nav-inner  { padding:0 16px; }
  .nav-menu   { display:none; }
  .nav-tel    { display:none !important; }
  .nav-burger { display:flex; }
  .sp-cta-bar { display:block; }
  body { padding-bottom:calc(62px + env(safe-area-inset-bottom)); }
  .nav-logo-img,
  .nav-logo-img-full { height:38px; }
}