:root {
            --color-saffron: #FF9933;
            --color-navy: #001F3F;
            --color-green: #138808;
            --color-orange: #FB8C00;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
            min-height: 100vh;
        }

        .tab-button {
            transition: all 0.3s ease;
        }

        .tab-button.active {
            background: linear-gradient(135deg, var(--color-green) 0%, var(--color-saffron) 100%);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .tab-button:not(.active):hover {
            background: rgba(255,153,51,0.1);
            transform: translateY(-1px);
        }

        .login-content {
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.4s ease;
            display: none;
        }

        .login-content.active {
            opacity: 1;
            transform: translateY(0);
            display: block;
        }

        .btn-glow {
            transition: all 0.3s ease;
        }

        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }

        .demo-card {
            background: linear-gradient(135deg, rgba(255,153,51,0.1) 0%, rgba(19,136,8,0.1) 100%);
            border: 2px solid rgba(255,153,51,0.3);
            cursor: pointer;
        }

        .demo-card:hover {
            background: linear-gradient(135deg, rgba(255,153,51,0.15) 0%, rgba(19,136,8,0.15) 100%);
            transform: translateY(-2px);
        }

        input:focus {
            outline: none;
            border-color: var(--color-green);
            box-shadow: 0 0 0 3px rgba(19,136,8,0.1);
        }

        .loading-spinner {
            display: none;
            width: 20px;
            height: 20px;
            border: 2px solid #ffffff;
            border-top: 2px solid transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }