.side-panel {
            width: 300px;
            height: 100vh;
            background: #2c3e50;
            position: fixed;
            top: 0;
            right: -300px;
            transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 1000;
        }
        
        .side-panel.open {
            right: 0;
        }
        
        .panel-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 25px;
            color: white;
            border-bottom: 1px solid #34495e;
        }
        
        .close-btn {
            font-size: 22px;
            cursor: pointer;
            color: #bdc3c7;
            transition: all 0.2s;
        }
        
        .close-btn:hover {
            color: #ecf0f1;
            transform: rotate(90deg);
        }
        
        .panel-menu {
            padding: 20px 0;
        }
        
        .panel-menu a {
            display: block;
            padding: 15px 25px;
            color: #ecf0f1;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .panel-menu a:hover {
            background: #34495e;
            padding-left: 30px;
        }
        
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.7);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        
        .overlay.active {
            opacity: 1;
            visibility: visible;
        }