:root {
            --primary: #4361ee;
            --primary-hover: #3a56d2;
            --secondary: #6c757d;
            --white: #ffffff;
            --light: #f8f9fa;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
        }

        h1 {
            text-align: center;
            color: #000;
            margin-bottom: 30px;
            font-weight: 600;
            font-size: 28px;
        }

        .buttons-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin-bottom: 30px;
        }

        .btn {
            display: block;
            width: 100%;
            padding: 16px 20px;
            background-color: var(--white);
            color: var(--primary);
            text-decoration: none;
            text-align: center;
            border-radius: var(--border-radius);
            border: 2px solid var(--primary);
            font-size: 16px;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: var(--box-shadow);
        }

        .btn:hover {
            background-color: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
        }

        .btn-secondary {
            border-color: var(--secondary);
            color: var(--secondary);
        }

        .btn-secondary:hover {
            background-color: var(--secondary);
            color: var(--white);
        }

        .back-link {
            display: block;
            text-align: center;
            margin-top: 20px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            font-size: 16px;
        }

        .back-link:hover {
            text-decoration: underline;
        }

        @media (min-width: 600px) {
            .buttons-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 900px) {
            .buttons-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }