* {
            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;
        }

        .container {
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            padding: 40px;
            max-width: 500px;
            width: 100%;
        }

        h1 {
            color: #2d3748;
            margin-bottom: 10px;
            font-size: 28px;
            text-align: center;
        }

        .subtitle {
            color: #718096;
            text-align: center;
            margin-bottom: 30px;
            font-size: 14px;
        }

        .input-group {
            margin-bottom: 25px;
        }

        label {
            display: block;
            color: #4a5568;
            font-weight: 600;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .fraction-inputs {
            display: grid;
            grid-template-columns: 1fr auto 1fr auto 1fr;
            gap: 10px;
            align-items: center;
        }

        input[type="number"] {
            width: 100%;
            padding: 12px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s;
        }

        input[type="number"]:focus {
            outline: none;
            border-color: #667eea;
        }

        .operator {
            font-size: 20px;
            color: #4a5568;
            font-weight: bold;
            text-align: center;
        }

        .fraction-bar {
            width: 100%;
            height: 2px;
            background: #cbd5e0;
        }

        button {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            margin-bottom: 20px;
        }

        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

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

        .swap-button {
            background: #48bb78;
            margin: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .swap-button:hover {
            box-shadow: 0 10px 20px rgba(72, 187, 120, 0.3);
        }

        .reverse-section {
            margin-top: 30px;
            padding-top: 30px;
            border-top: 2px solid #e2e8f0;
        }

        .section-title {
            color: #2d3748;
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 20px;
            text-align: center;
        }

        .mm-input {
            width: 100%;
            padding: 12px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 16px;
            margin-bottom: 15px;
        }

        .mm-input:focus {
            outline: none;
            border-color: #48bb78;
        }

        .result {
            background: #f7fafc;
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            min-height: 80px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            border: 2px solid #e2e8f0;
        }

        .result-value {
            font-size: 32px;
            font-weight: bold;
            color: #667eea;
            margin-bottom: 5px;
        }

        .result-label {
            color: #718096;
            font-size: 14px;
        }

        .examples {
            margin-top: 25px;
            padding: 15px;
            background: #edf2f7;
            border-radius: 8px;
        }

        .examples h3 {
            color: #2d3748;
            font-size: 14px;
            margin-bottom: 10px;
        }

        .examples ul {
            list-style: none;
            color: #4a5568;
            font-size: 13px;
            line-height: 1.8;
        }

        .examples li::before {
            content: "→ ";
            color: #667eea;
            font-weight: bold;
        }

        @media (max-width: 480px) {
            .container {
                padding: 25px;
            }

            h1 {
                font-size: 24px;
            }

            .result-value {
                font-size: 28px;
            }
        }