/* Shared navigation; mobile is a non-modal disclosure with a no-JS fallback. */
html:root{scroll-padding-top:100px}
.site-header{position:sticky;top:0;z-index:30;background:var(--canvas)}
.site-header .topbar-inner{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;min-height:80px;padding-block:12px;gap:36px;border-bottom:1px solid var(--line)}
.site-header .brand{font-size:22px;font-weight:650;gap:9px}.site-header .brand-mark{width:34px;height:34px;border-radius:9px}
.site-header .header-panel{display:flex;align-items:center;justify-content:flex-end;gap:28px}
.site-header .main-nav{display:flex;align-items:center;justify-content:flex-end;gap:3px;width:auto;order:initial;margin:0 0 0 auto}
.site-header .main-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 12px;border-radius:10px;font-size:15px;font-weight:500;color:var(--muted);text-decoration:none;white-space:nowrap}
.site-header .main-nav a[aria-current=location]{color:var(--action);background:var(--soft)}
.site-header .main-nav a[aria-current=location]::after{display:none}
.header-toggle{display:none}
.language-switch{position:relative;flex-shrink:0}.language-switch summary{display:flex;align-items:center;gap:10px;min-height:44px;padding:9px 12px;border:1px solid var(--line);border-radius:10px;font-size:13px;list-style:none;cursor:pointer}.language-switch summary::-webkit-details-marker{display:none}.language-switch summary i{font-size:16px}.language-switch[open] summary i{transform:rotate(180deg)}.language-switch nav{position:absolute;z-index:40;top:calc(100% + 8px);left:0;min-width:160px;padding:6px;border:1px solid var(--line);border-radius:12px;background:var(--surface);box-shadow:0 12px 24px #00000012}.language-switch nav a{display:flex;align-items:center;min-height:44px;padding:9px 12px;border-radius:8px;color:var(--muted);font-size:14px;text-decoration:none}.language-switch nav a[aria-current=page]{color:var(--action);background:var(--soft)}
@media(max-width:1100px){.site-header .topbar-inner{gap:20px}.site-header .header-panel{gap:14px}.site-header .main-nav a{padding-inline:8px}}
@media(max-width:1000px){
  html{scroll-padding-top:100px}
  .site-header .topbar-inner{grid-template-columns:1fr auto;min-height:72px;gap:0 16px;padding-block:12px}
  .site-header .brand{font-size:20px}.site-header .brand-mark{width:32px;height:32px}
  .site-header[data-menu-open] .header-toggle{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font-size:15px;font-weight:500;cursor:pointer}
  .header-toggle i{font-size:17px}.header-toggle[aria-expanded=true] i{transform:rotate(180deg)}
  .site-header .header-panel{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr);justify-content:stretch;gap:16px;padding-block:16px}
  .site-header[data-menu-open] .header-panel{position:absolute;top:calc(100% + 8px);left:0;right:0;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:0 12px 28px #00000012;max-height:calc(100dvh - 100px);overflow-y:auto}
  .site-header[data-menu-open=false] .header-panel{display:none}
  .site-header .main-nav{display:grid;gap:4px;justify-content:stretch;width:100%;margin:0;order:-1}
  .language-switch{border-top:1px solid var(--line);padding-top:12px}.language-switch summary{justify-content:space-between}.language-switch nav{position:static;margin-top:8px;box-shadow:none;min-width:0}
  .site-header .main-nav a{justify-content:flex-start;min-height:44px;padding:10px 12px;font-size:16px;white-space:normal}
}
@media(max-width:370px){.site-header .brand{font-size:18px;gap:7px}.site-header .header-toggle{padding-inline:10px}}