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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .converter {
            background: white;
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            text-align: center;
            max-width: 400px;
            width: 100%;
            height: fit-content;
        }
        .content {
            background: white;
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            text-align: center;
            max-width: 800px;
            width: 100%;
        }
        .container { 
            display: flex; 
            flex-direction: row; 
            gap: 1rem; 
        }

        h1 {
            color: #333;
            margin-bottom: 30px;
            font-size: 28px;
            font-weight: 600;
        }

        .input-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #666;
            font-weight: 500;
            font-size: 14px;
        }

        input[type="number"] {
            width: 100%;
            padding: 15px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 16px;
            transition: border-color 0.3s ease;
            outline: none;
        }

        input[type="number"]:focus {
            border-color: #667eea;
        }

        .result {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 10px;
            margin-top: 20px;
            border: 1px solid #e9ecef;
        }

        .result-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 5px;
        }

        .result-label {
            color: #666;
            font-size: 14px;
        }

        .format-toggle {
            display: flex;
            background: #e9ecef;
            border-radius: 6px;
            padding: 2px;
        }

        .format-btn {
            background: none;
            border: none;
            padding: 4px 8px;
            font-size: 11px;
            color: #666;
            cursor: pointer;
            border-radius: 4px;
            transition: all 0.2s ease;
        }

        .format-btn.active {
            background: white;
            color: #333;
            font-weight: 500;
        }

        .format-btn:hover:not(.active) {
            color: #333;
        }

        .result-value {
            font-size: 24px;
            font-weight: 600;
            color: #333;
        }

        .swap-btn {
            background: #f1f1f1;
            color: #444;
            border: none;
            padding: 16px 32px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin: 25px auto;
            width: fit-content;
            transition: all 0.3s ease;
        }

        .swap-btn:hover {
            background: #ccc;
            transform: translateY(-1px);
        }

        .swap-btn:active {
            transform: translateY(0);
        }

        .conversion-info {
            margin-top: 25px;
            padding: 15px;
            background: #e8f2ff;
            border-radius: 8px;
            font-size: 14px;
            color: #0066cc;
        }

        /* SEO Content Styles */
        .seo-content {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
            color: #333;
        }

        .content-container h2 {
            color: #333;
            font-size: 24px;
            margin-bottom: 15px;
            font-weight: 600;
        }

        .content-container h3 {
            color: #333;
            font-size: 20px;
            margin: 30px 0 15px 0;
            font-weight: 600;
        }

        .content-container h4 {
            color: #333;
            font-size: 16px;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .content-container p {
            line-height: 1.6;
            margin-bottom: 15px;
            color: #555;
        }

        .conversion-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 15px;
            margin-bottom: 30px;
        }

        .conversion-item {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid #667eea;
            font-size: 14px;
            line-height: 1.4;
        }

        .faq-section {
            margin-top: 20px;
        }

        .faq-item {
            background: white;
            border: 1px solid #e9ecef;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 15px;
        }

        .faq-item h4 {
            color: #667eea;
            margin-bottom: 10px;
        }

        @media (max-width: 768px) {
            .conversion-grid {
                grid-template-columns: 1fr;
            }
            
            .seo-content {
                margin-top: 40px;
            }
            
            .content-container h2 {
                font-size: 20px;
            }
            
            .content-container h3 {
                font-size: 18px;
            }
            .container { 
            flex-direction: column; 
        }
        }