/* CSS Variables */
        :root {
            --bg-dark: #0b0f19;
            --bg-gradient: linear-gradient(135deg, #0b0f19 0%, #1a233a 100%);
            --card-bg: rgba(255, 255, 255, 0.03);
            --card-border: rgba(255, 255, 255, 0.08);
            --primary: #3b82f6;
            --primary-hover: #2563eb;
            --accent: #8b5cf6;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --danger: #ef4444;
            --success: #10b981;
            --input-bg: rgba(0, 0, 0, 0.2);
            --radius: 12px;
            --transition: all 0.3s ease;
        }

        /* Reset & Base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        body {
            background: var(--bg-gradient);
            color: var(--text-main);
            min-height: 100vh;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2rem 1rem;
        }

        /* Typography */
        h1, h2, h3 { color: #fff; font-weight: 600; }
        h1 { font-size: 2rem; margin-bottom: 0.5rem; text-align: center; background: linear-gradient(to right, #60a5fa, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        p { color: var(--text-muted); }

        /* Layout */
        .container {
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
        }

        header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .layout-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: start;
        }

        /* Cards */
        .card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        /* Form Styles */
        .form-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        label {
            font-size: 0.9rem;
            font-weight: 500;
            color: #cbd5e1;
        }

        label .req {
            color: var(--danger);
        }

        input[type="text"], input[type="email"], input[type="tel"], input[type="url"], select, textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            background: var(--input-bg);
            border: 1px solid var(--card-border);
            border-radius: 8px;
            color: #fff;
            font-size: 1rem;
            transition: var(--transition);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }

        textarea {
            resize: vertical;
            min-height: 100px;
        }

        /* Checkbox */
        .checkbox-group {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            margin-top: 1rem;
            background: rgba(59, 130, 246, 0.1);
            padding: 1rem;
            border-radius: 8px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .checkbox-group input {
            margin-top: 0.2rem;
            width: 18px;
            height: 18px;
            accent-color: var(--primary);
            cursor: pointer;
        }

        .checkbox-group label {
            cursor: pointer;
            font-size: 0.9rem;
            color: #e2e8f0;
        }

        /* Buttons */
        .btn-group {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
            flex-direction: column;
        }

        button {
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-primary {
            background: linear-gradient(to right, var(--primary), var(--accent));
            color: #fff;
            flex: 1;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-muted);
            border: 1px solid var(--text-muted);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
        }

        /* Pricing Info Banner */
        .pricing-info {
            position: sticky;
            top: 2rem;
        }

        .badge {
            display: inline-block;
            background: rgba(16, 185, 129, 0.1);
            color: var(--success);
            border: 1px solid rgba(16, 185, 129, 0.2);
            padding: 0.4rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .pricing-info h2 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .pricing-info p {
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .perks-list {
            list-style: none;
        }

        .perks-list li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 0.8rem;
            font-size: 0.95rem;
            color: #e2e8f0;
        }

        .perks-list li::before {
            content: '✓';
            color: var(--success);
            font-weight: bold;
            background: rgba(16, 185, 129, 0.1);
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

        /* Dynamic Sections */
        .dynamic-section {
            display: none;
            animation: fadeIn 0.4s ease;
            background: rgba(255, 255, 255, 0.02);
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px dashed var(--card-border);
            margin-top: 1rem;
        }

        .dynamic-section.active {
            display: grid;
            gap: 1.5rem;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-5px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Toast Notification */
        .toast {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #10b981;
            color: white;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transform: translateX(150%);
            transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
            z-index: 1000;
        }

        .toast.show {
            transform: translateX(0);
        }

        /* Desktop Layout */
        @media (min-width: 768px) {
            .layout-grid {
                grid-template-columns: 1.8fr 1fr;
            }
            .form-row {
                grid-template-columns: 1fr 1fr;
            }
            .btn-group {
                flex-direction: row;
            }
            .btn-secondary {
                width: 150px;
            }
        }