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(max-width:768px){.menu-toggle{display:flex}nav.main-nav{position:absolute;top:70px;left:0;right:0;background-color:var(--bg-main);border-bottom:1px solid var(--border-color);padding:1.5rem;display:none;box-shadow:0 10px 20px rgba(0,0,0,.3)}nav.main-nav.active{display:block}nav.main-nav ul{flex-direction:column;align-items:stretch;gap:1.25rem}.nav-buttons{display:none}.api-grid{grid-template-columns:1fr}.api-sidebar{position:static;margin-bottom:2rem}.footer-top{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:1.5rem;text-align:center}}