/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--rule)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:28px;height:76px}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;flex-shrink:0}
.brand__mark{width:32px;height:32px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:13px;font-weight:700;border-radius:1px;flex-shrink:0}
.brand__name{font-family:var(--serif);font-size:19px;font-weight:600;color:var(--ink);letter-spacing:-.015em;white-space:nowrap}
.brand__thin{font-weight:400}
.nav ul{display:flex;align-items:center;gap:30px}
.nav a{position:relative;font-size:14px;font-weight:500;color:var(--body);text-decoration:none;padding:6px 0;transition:color .16s var(--ease)}
.nav a::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:600}
.nav a[aria-current="page"]::after{transform:scaleX(1)}
.header__actions{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;width:42px;height:42px;background:transparent;border:1px solid var(--rule);border-radius:var(--radius);cursor:pointer;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:17px;height:1.5px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-2);border-top:1px solid var(--rule);padding:72px 0 34px}
.footer__grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr 1fr;gap:44px;padding-bottom:52px;border-bottom:1px solid var(--rule)}
.footer__brand .brand{margin-bottom:18px}
.footer__brand p{font-size:14px;color:var(--muted);line-height:1.68;max-width:34ch;margin-bottom:20px}
.footer__col h4{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--ink);margin:0 0 18px}
.footer__col li{margin-bottom:11px}
.footer__col a{font-size:14px;color:var(--muted);text-decoration:none;transition:color .16s var(--ease)}
.footer__col a:hover{color:var(--accent)}
.footer__bottom{display:flex;flex-wrap:wrap;gap:18px 32px;align-items:center;justify-content:space-between;padding-top:28px}
.footer__legal{display:flex;flex-wrap:wrap;gap:22px;font-size:12.5px;color:var(--muted-2)}
.footer__legal a{text-decoration:none;color:inherit}
.footer__legal a:hover{color:var(--accent)}
.footer__social{display:flex;gap:18px}
.footer__social a{font-size:12.5px;font-weight:500;color:var(--muted);text-decoration:none;letter-spacing:.03em}
.footer__social a:hover{color:var(--accent)}

/* ---------- interior page head ---------- */
.page-head{background:var(--paper-2);border-bottom:1px solid var(--rule);padding:64px 0 52px}
.breadcrumbs{font-size:12.5px;color:var(--muted-2);margin-bottom:22px;display:flex;flex-wrap:wrap;gap:9px;align-items:center}
.breadcrumbs a{text-decoration:none;color:var(--muted)}
.breadcrumbs a:hover{color:var(--accent)}
.page-head h1{font-size:clamp(30px,4.6vw,48px);letter-spacing:-.03em;margin-bottom:16px}
.page-head__intro{font-size:17px;color:var(--muted);line-height:1.66;max-width:64ch}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .footer__grid{grid-template-columns:1fr 1fr 1fr;gap:40px 32px}
  .footer__brand{grid-column:1/-1}
}
@media (max-width:960px){
  .nav-toggle{display:flex}
  .nav{position:fixed;top:76px;left:0;right:0;background:#fff;border-bottom:1px solid var(--rule);padding:12px var(--gutter) 28px;transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;max-height:calc(100vh - 76px);overflow-y:auto;box-shadow:0 24px 40px -28px rgba(16,20,24,.4)}
  .nav.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav ul{flex-direction:column;align-items:stretch;gap:0}
  .nav li{border-bottom:1px solid var(--rule)}
  .nav li:last-child{border-bottom:0}
  .nav a{display:block;padding:17px 0;font-size:16px}
  .nav a::after{display:none}
  .nav a[aria-current="page"]{color:var(--accent)}
  .page-head{padding:44px 0 38px}
}
@media (max-width:620px){
  .header__inner{height:66px}
  .nav{top:66px}
  .brand__name{font-size:17px}
  .brand__mark{width:29px;height:29px;font-size:12px}
  .header__actions .btn{display:none}
  .footer__grid{grid-template-columns:1fr 1fr}
}