:root{--ink:#0f172a;--blue:#2563eb;--muted:#475569;--line:rgba(15,23,42,.12);--canvas:#f1f5f9;--blue-pale:#e7edfd;--coral:#e2624a;--teal:#14b8a6;--display:"Cabinet Grotesk",sans-serif;--ease:cubic-bezier(.16,1,.3,1) }.mobile-menu{display:none}@media (max-width:850px){.mobile-menu{display:block;margin-left:auto;position:relative;flex:none;pointer-events:auto}.mobile-menu summary{list-style:none;width:54px;height:54px;border:1.5px solid rgba(15,23,42,.28);border-radius:50%;background:var(--blue-pale);box-shadow:0 6px 16px #0f172a1a;display:grid;place-content:center;gap:6px;cursor:pointer}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary i{width:22px;height:2.5px;border-radius:2px;background:var(--ink)}.about-header>nav,.center-header>nav,.knowledge-header>nav{display:none}}.mobile-menu-backdrop{display:none}.mobile-menu[open] .mobile-menu-backdrop{display:block;position:fixed;inset:0;background:#0f172a73;backdrop-filter:blur(2px);z-index:39;animation:mm-fade .25s var(--ease)}@keyframes mm-fade{0%{opacity:0}to{opacity:1}}.mobile-menu nav{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);height:100vh;padding:22px 18px;background:#fff;border:none;border-left:1px solid var(--line);border-radius:0;box-shadow:-20px 0 60px #0f172a2e;display:flex;flex-direction:column;gap:4px;font-size:15px;z-index:40;transform:translate(100%);transition:transform .35s var(--ease)}.mobile-menu[open] nav{transform:translate(0)}.mobile-menu-head{display:flex;align-items:center;justify-content:space-between;padding:4px 6px 14px;border-bottom:1px solid var(--line);margin-bottom:8px}.mobile-menu-title{font-family:var(--display);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.mobile-menu nav a{display:flex;align-items:center;gap:12px;padding:15px 12px;font-size:16px;border-radius:12px;color:var(--ink);font-weight:600;text-decoration:none;transition:background .2s var(--ease)}.mobile-menu nav a i{width:36px;height:36px;border-radius:11px;display:grid;place-content:center;flex:none;font-style:normal;font-size:16px;color:#fff;background:var(--muted)}.mobile-menu nav a.nav-anatomy i{background:linear-gradient(135deg,var(--blue),#1d4ed8)}.mobile-menu nav a.nav-injury i{background:var(--coral)}.mobile-menu nav a.nav-encyclopedia i{background:var(--ink)}.mobile-menu nav a.nav-recovery i{background:linear-gradient(135deg,var(--teal),#0d9488)}.mobile-menu nav a.nav-about i{background:var(--muted)}.mobile-menu nav a:active,.mobile-menu nav a:hover{background:var(--canvas)}.mobile-menu-soon{margin-top:auto;padding:12px;text-align:center;font-size:11px;color:var(--muted);border-top:1px solid var(--line);font-weight:500}.mobile-menu-close{width:32px;height:32px;border-radius:50%;border:none;background:var(--canvas);color:var(--ink);font-size:13px;cursor:pointer}