:root {
            --primary-color: #2c3e50;
            --secondary-color: #34495e;
            --accent-color: #3498db;
            --text-color: #ecf0f1;
            --hover-color: #2980b9;
            --card-bg: #ffffff;
            --card-text: #2c3e50;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: var(--text-color);
        }

        /* Sidebar Styles */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            height: 100%;
            width: 250px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            padding-top: 20px;
            transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow);
            z-index: 1000;
            overflow-y: auto;
        }

        .sidebar.closed {
            width: 0;
            overflow: hidden;
            padding: 0;
        }

        .sidebar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .sidebar-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: white;
            margin: 0;
        }

        .sidebar-menu {
            margin-top: 20px;
        }

        .sidebar a {
            display: flex;
            align-items: center;
            color: var(--text-color);
            padding: 12px 20px;
            text-decoration: none;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }

        .sidebar a i {
            margin-right: 10px;
            width: 20px;
            text-align: center;
        }

        .sidebar a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-left: 4px solid var(--accent-color);
        }

        .sidebar a.active {
            background-color: rgba(255, 255, 255, 0.1);
            border-left: 4px solid var(--accent-color);
        }

        /* Toggle Button */
        .toggle-btn {
            position: fixed;
            top: 20px;
            left: 210px;
            width: 40px;
            height: 40px;
            background-color: var(--accent-color);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            z-index: 1100;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .toggle-btn:hover {
            background-color: var(--hover-color);
            transform: scale(1.1);
        }

        .toggle-btn i {
            font-size: 1.2rem;
        }

        /* Main Content */
        .content {
            margin-left: 250px;
            padding: 30px;
            transition: margin-left 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            min-height: 100vh;
        }

        .content.closed {
            margin-left: 0;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e0e0e0;
        }

        .page-title {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 0;
        }

        .search-bar {
            display: flex;
            align-items: center;
            background-color: white;
            border-radius: 30px;
            padding: 8px 15px;
            box-shadow: var(--shadow);
            width: 300px;
        }

        .search-bar input {
            border: none;
            outline: none;
            flex: 1;
            padding: 5px;
            font-size: 0.9rem;
        }

        .search-bar i {
            color: #7f8c8d;
            margin-right: 10px;
        }

        /* Link Container */
        .link-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
        }

        .link-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            border: 1px solid #e0e0e0;
            position: relative;
            overflow: hidden;
        }

        /* Gradientes suaves para os cards */
        .link-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #3498db, #9b59b6, #2ecc71, #f1c40f, #e74c3c);
            opacity: 0.7;
        }

        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
            border-color: var(--accent-color);
        }

        .link-icon {
            font-size: 2rem;
            margin-bottom: 15px;
            transition: var(--transition);
        }

        .link-card:hover .link-icon {
            transform: scale(1.1);
        }

        .link-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--card-text);
            margin: 0;
            word-break: break-word;
        }

        .link-url {
            font-size: 0.8rem;
            color: #7f8c8d;
            margin-top: 5px;
            word-break: break-all;
        }

        /* Cores variadas para os ícones */
        .link-card:nth-child(6n+1) .link-icon { color: #3498db; }
        .link-card:nth-child(6n+2) .link-icon { color: #2ecc71; }
        .link-card:nth-child(6n+3) .link-icon { color: #e74c3c; }
        .link-card:nth-child(6n+4) .link-icon { color: #f39c12; }
        .link-card:nth-child(6n+5) .link-icon { color: #9b59b6; }
        .link-card:nth-child(6n+6) .link-icon { color: #1abc9c; }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 50px;
            grid-column: 1 / -1;
        }

        .empty-icon {
            font-size: 4rem;
            color: #bdc3c7;
            margin-bottom: 20px;
        }

        .empty-text {
            color: #7f8c8d;
            font-size: 1.2rem;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .link-container {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 0;
                overflow: hidden;
            }
            
            .sidebar.closed {
                width: 250px;
            }
            
            .content {
                margin-left: 0;
            }
            
            .toggle-btn {
                left: 20px;
            }
            
            .search-bar {
                width: 100%;
                margin-top: 20px;
            }
            
            .header {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 576px) {
            .link-container {
                grid-template-columns: 1fr;
            }
            
            .content {
                padding: 20px;
            }
        }

        /* Animation */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .fade-in {
            animation: fadeIn 0.5s ease forwards;
        }