/* Shared navigation. Contact and existing page styles remain untouched. */
.header{position:relative;z-index:10}
.nav-group{position:relative}
.nav-group summary{display:flex;align-items:center;gap:7px;cursor:pointer;list-style:none;font-size:14px;line-height:1.5;padding:14px 0}
.nav-group summary::-webkit-details-marker{display:none}
.nav-group summary:hover,.nav-group[open]>summary{color:var(--accent)}
.nav-group summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}
.nav-group[open]>summary>span{transform:rotate(180deg)}
.nav-submenu{position:absolute;top:100%;left:-18px;min-width:260px;padding:12px;background:var(--bg);border:1px solid var(--line);border-radius:8px;box-shadow:0 12px 30px #26213018}
.nav-submenu a{display:block;padding:11px 12px;font-size:16px;line-height:1.5;border-radius:4px}
.nav-submenu a:hover,.nav-submenu a:focus-visible{background:var(--green);color:var(--accent)}
@media(max-width:1100px){
 .header nav{max-height:calc(100dvh - 85px);overflow-y:auto;overscroll-behavior:contain}
 .nav-group{border-bottom:1px solid var(--line)}
 .nav-group summary{justify-content:space-between;font-size:16px;padding:13px 0}
 .nav-submenu{position:static;min-width:0;padding:0 0 12px 10px;box-shadow:none;border:0;background:transparent}
 .nav-submenu a{padding:10px 12px}
}
@media(prefers-reduced-motion:reduce){.nav-group summary>span{transition:none}}