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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
            max-width: 800px;
            width: 100%;
            animation: slideIn 0.8s ease-out;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .header {
            text-align: center;
            margin-bottom: 40px;
        }

        .header h1 {
            font-size: 2.5rem;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 10px;
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from {
                text-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
            }
            to {
                text-shadow: 0 0 20px rgba(118, 75, 162, 0.8);
            }
        }

        .subtitle {
            color: #666;
            font-size: 1.2rem;
            font-weight: 300;
        }

        .input-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }

        .input-group {
            background: rgba(255, 255, 255, 0.8);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .input-group:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
        }

        .input-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #333;
            font-size: 1.1rem;
        }

        .input-row {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 15px;
        }

        .input-row input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.9);
            width: 100%;
            box-sizing: border-box;
        }

        .input-row input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: scale(1.02);
        }

        .unit-selector {
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.9);
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 80px;
            box-sizing: border-box;
        }

        .unit-selector:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .convert-btn {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 15px 40px;
            font-size: 1.2rem;
            font-weight: 600;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: block;
            margin: 0 auto 40px;
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        }

        .convert-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
        }

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

        .results {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.6s ease;
        }

        .results.show {
            opacity: 1;
            transform: translateY(0);
        }

        .result-card {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 25px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
            transition: all 0.3s ease;
            animation: fadeInUp 0.6s ease forwards;
        }

        .result-card:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .result-card h3 {
            font-size: 1.8rem;
            margin-bottom: 10px;
            animation: countUp 1s ease-out;
        }

        .result-card p {
            font-size: 1rem;
            opacity: 0.9;
        }

        @keyframes countUp {
            from {
                opacity: 0;
                transform: scale(0.8);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .pulse {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
                margin: 10px;
            }
            
            .header h1 {
                font-size: 2rem;
            }
            
            .input-section {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .input-row {
                flex-direction: column;
                gap: 15px;
            }
            
            .input-row input,
            .unit-selector {
                width: 100%;
            }
            
            .results {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .header h1 {
                font-size: 1.8rem;
            }
            
            .subtitle {
                font-size: 1rem;
            }
            
            .input-group {
                padding: 20px;
            }
        }