:root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --glass-bg: rgba(255, 255, 255, 0.95);
            --text-dark: #2d3436;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Poppins', sans-serif;
            background: var(--primary-gradient);
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--text-dark);
        }

        .container {
            background: var(--glass-bg);
            padding: 3rem;
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            text-align: center;
            width: 90%;
            max-width: 500px;
        }

        h1 {
            font-weight: 600;
            margin-bottom: 10px;
            letter-spacing: -1px;
            color: #4834d4;
        }

        .subtitle {
            font-size: 0.9rem;
            color: #636e72;
            margin-bottom: 30px;
        }

        .button-grid {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        button {
            position: relative;
            padding: 15px 20px;
            font-size: 1rem;
            font-weight: 400;
            color: white;
            background: #4834d4;
            border: none;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        button:hover {
            background: #686de0;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(104, 109, 224, 0.4);
        }

        button:active {
            transform: translateY(0);
        }

        button.loading {
            background: #95afc0 !important;
            cursor: wait;
            pointer-events: none;
        }

        .btn-icon {
            margin-right: 10px;
        }