* {
            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 20px 40px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 800px;
            animation: slideUp 0.6s ease-out;
        }

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

        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 2.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .input-section {
            margin-bottom: 30px;
        }

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

        #inputText {
            width: 100%;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 12px;
            font-size: 16px;
            font-family: inherit;
            resize: vertical;
            min-height: 120px;
            transition: all 0.3s ease;
            background: rgba(255, 255, 255, 0.8);
        }

        #inputText:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
        }

        .conversions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .conversion-item {
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
            padding: 20px;
            border: 2px solid #f0f0f0;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .conversion-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-color: #667eea;
        }

        .conversion-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .conversion-item:hover::before {
            transform: scaleX(1);
        }

        .conversion-title {
            font-weight: 600;
            color: #333;
            margin-bottom: 12px;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .copy-btn {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 6px 12px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 12px;
            font-weight: 500;
            transition: all 0.3s ease;
            opacity: 0.8;
        }

        .copy-btn:hover {
            opacity: 1;
            transform: scale(1.05);
        }

        .copy-btn:active {
            transform: scale(0.95);
        }

        .output-text {
            background: rgba(240, 240, 240, 0.5);
            padding: 12px;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            line-height: 1.5;
            min-height: 60px;
            word-wrap: break-word;
            border: 1px solid #e0e0e0;
            color: #333;
        }

        .char-count {
            text-align: center;
            margin-top: 20px;
            color: #666;
            font-size: 14px;
            padding: 10px;
            background: rgba(255, 255, 255, 0.5);
            border-radius: 8px;
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            background: #4caf50;
            color: white;
            padding: 12px 20px;
            border-radius: 8px;
            font-weight: 500;
            opacity: 0;
            transform: translateX(100px);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .notification.show {
            opacity: 1;
            transform: translateX(0);
        }

        @media (max-width: 768px) {
            .container {
                padding: 20px;
                margin: 10px;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .conversions-grid {
                grid-template-columns: 1fr;
            }
        }