:root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --warning-gradient: linear-gradient(135deg, #fdbb2d 0%, #22c1c3 100%);
            --danger-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
            --dark-bg: #1a1d29;
            --card-bg: rgba(255, 255, 255, 0.95);
            --text-primary: #2d3748;
            --text-secondary: #718096;
            --border-color: rgba(255, 255, 255, 0.1);
            --shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            --shadow-hover: 0 30px 60px rgba(0, 0, 0, 0.15);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: var(--primary-gradient);
            min-height: 100vh;
            color: var(--text-primary);
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%);
            pointer-events: none;
            z-index: -1;
        }

        .navbar {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .admin-card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .admin-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .login-card {
            max-width: 400px;
            margin: 5rem auto;
            text-align: center;
        }

        .form-control, .form-select {
            border-radius: 15px;
            border: 2px solid #e2e8f0;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.9);
        }

        .form-control:focus, .form-select:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
            background: white;
        }

        .btn {
            border-radius: 15px;
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
        }

        .btn-primary { background: var(--primary-gradient); }
        .btn-success { background: var(--success-gradient); }
        .btn-warning { background: var(--warning-gradient); }
        .btn-danger { background: var(--danger-gradient); }
        .btn-secondary { background: linear-gradient(135deg, #6c757d 0%, #495057 100%); }

        .table-container {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            overflow-x: auto;
        }

        .table {
            margin-bottom: 0;
        }

        .table thead th {
            border-bottom: 2px solid #dee2e6;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            font-weight: 600;
            color: var(--text-primary);
        }

        .table tbody tr:hover {
            background: rgba(102, 126, 234, 0.1);
        }

        .alert {
            border-radius: 15px;
            border: none;
            box-shadow: var(--shadow);
            backdrop-filter: blur(20px);
        }

        .alert-success {
            background: linear-gradient(135deg, rgba(40, 167, 69, 0.1) 0%, rgba(32, 201, 151, 0.1) 100%);
            color: #155724;
        }

        .alert-danger {
            background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(238, 90, 36, 0.1) 100%);
            color: #721c24;
        }

        .modal-content {
            border-radius: 20px;
            border: none;
            box-shadow: var(--shadow-hover);
            backdrop-filter: blur(20px);
        }

        .modal-header {
            background: var(--primary-gradient);
            color: white;
            border-radius: 20px 20px 0 0;
        }

        .stats-card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 2rem;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .calendar-type-badge {
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.875rem;
            font-weight: 500;
        }

        .badge-office365 {
            background: linear-gradient(135deg, #0078d4 0%, #106ebe 100%);
            color: white;
        }

        .badge-google {
            background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
            color: white;
        }

        .badge-other {
            background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
            color: white;
        }

        .float-animation {
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .pulse-animation {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }

        @media (max-width: 768px) {
            .admin-card {
                padding: 1.5rem;
                margin-bottom: 1rem;
            }

            .table-container {
                padding: 1rem;
            }

            .stats-number {
                font-size: 2rem;
            }

            .btn {
                padding: 0.5rem 1rem;
                font-size: 0.875rem;
            }
        }

        .url-preview {
            max-width: 200px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .action-buttons {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .home-btn {
            background: var(--success-gradient);
            border: none;
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }

        .home-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
            color: white;
        }