.site-header{position:sticky;top:0;z-index:20;background:#fafbf7f5;border-bottom:1px solid #d9e3db;backdrop-filter:blur(12px);color:#183a3c;font:14px/1.5 system-ui,'Yu Gothic',sans-serif}.site-header .site-nav{max-width:1120px;margin:auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.site-header .site-brand{font-weight:800;white-space:nowrap;text-decoration:none;color:#183a3c}.site-header .site-links{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:12px 20px}.site-header a{color:#096b61}.site-header a:focus-visible{outline:3px solid #df7b19;outline-offset:4px}.guide-mode-controls{display:flex;justify-content:flex-end;margin-top:20px}@media(max-width:760px){.site-header .site-nav{align-items:flex-start;flex-direction:column;gap:12px;padding:14px 20px}.site-header .site-links{justify-content:flex-start;gap:10px 16px}}