.site-header{background-color:rgba(255,255,255,0.9);box-shadow:0 2px 4px rgba(0,0,0,0.05);transition:background-color 0.3s ease}.site-header a,.site-header .menu a{color:#333}html,body{height:100%;margin:0;padding:0}#page-container{display:flex;flex-direction:column;min-height:100vh}#et-main-area{flex:1;display:flex;flex-direction:column}#main-content{flex:1}footer,#main-footer{flex-shrink:0}