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

        body {
            font-family: 'Inter', sans-serif;
            background: #0f0f23;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
        }

        /* Animated Background */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
            opacity: 0.15;
            z-index: 0;
        }

        .animated-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            overflow: hidden;
        }

        .circle {
            position: absolute;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.3), rgba(118, 75, 162, 0.3));
            animation: float 20s infinite;
            backdrop-filter: blur(50px);
        }

        .circle:nth-child(1) {
            width: 300px;
            height: 300px;
            top: -150px;
            left: -150px;
            animation-delay: 0s;
        }

        .circle:nth-child(2) {
            width: 400px;
            height: 400px;
            bottom: -200px;
            right: -200px;
            animation-delay: 7s;
            background: linear-gradient(135deg, rgba(240, 147, 251, 0.3), rgba(245, 87, 108, 0.3));
        }

        .circle:nth-child(3) {
            width: 250px;
            height: 250px;
            top: 50%;
            left: 50%;
            animation-delay: 14s;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
        }

        @keyframes float {
            0%, 100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(100px, -100px) scale(1.1);
            }
            66% {
                transform: translate(-50px, 100px) scale(0.9);
            }
        }

        .container {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(249, 250, 251, 0.98) 100%);
            backdrop-filter: blur(20px);
            border-radius: 30px;
            box-shadow: 
                0 30px 80px rgba(0, 0, 0, 0.4), 
                0 0 0 1px rgba(255, 255, 255, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.9);
            padding: 50px 40px;
            max-width: 550px;
            width: 100%;
            position: relative;
            z-index: 1;
            animation: slideUp 0.8s ease;
            margin-bottom: 30px;
            border: 1px solid rgba(255, 255, 255, 0.3);
        }
        
        .container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 50%, rgba(240, 147, 251, 0.05) 100%);
            border-radius: 30px;
            z-index: -1;
        }

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

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

        .logo {
            font-size: 50px;
            margin-bottom: 15px;
            display: inline-block;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.1);
            }
        }

        h1 {
            color: #1a1a2e;
            margin-bottom: 10px;
            font-size: 32px;
            font-weight: 800;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        .subtitle {
            color: #64748b;
            font-size: 15px;
            font-weight: 500;
        }

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

        label {
            display: block;
            margin-bottom: 10px;
            color: #334155;
            font-weight: 600;
            font-size: 14px;
            letter-spacing: 0.3px;
        }

        input[type="text"],
        input[type="url"] {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid rgba(226, 232, 240, 0.6);
            border-radius: 15px;
            font-size: 16px;
            font-family: 'Inter', sans-serif;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            outline: none;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(249, 250, 251, 0.9) 100%);
            color: #1e293b;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.03);
        }

        input[type="text"]:focus,
        input[type="url"]:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), 0 4px 12px rgba(102, 126, 234, 0.15);
            transform: translateY(-2px);
        }

        input::placeholder {
            color: #94a3b8;
        }

        .button-group {
            display: flex;
            gap: 12px;
            margin-bottom: 35px;
        }

        button {
            flex: 1;
            padding: 16px 24px;
            border: none;
            border-radius: 15px;
            font-size: 16px;
            font-weight: 600;
            font-family: 'Inter', sans-serif;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            outline: none;
            position: relative;
            overflow: hidden;
        }

        button::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.3);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }

        button:active::before {
            width: 300px;
            height: 300px;
        }

        .generate-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
        }

        .generate-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
        }

        .generate-btn:active {
            transform: translateY(-1px);
        }

        .download-btn {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: white;
            display: none;
            box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
        }

        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(16, 185, 129, 0.4);
        }

        .download-btn:active {
            transform: translateY(-1px);
        }

        .qr-container {
            display: none;
            background: linear-gradient(135deg, #fafbfc 0%, #f0f4f8 100%);
            border-radius: 20px;
            padding: 35px;
            text-align: center;
            border: 2px solid rgba(226, 232, 240, 0.5);
            box-shadow: inset 0 2px 10px rgba(102, 126, 234, 0.05);
            position: relative;
            overflow: hidden;
        }
        
        .qr-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(102, 126, 234, 0.03) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }
        
        @keyframes rotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .qr-container.show {
            display: block;
            animation: fadeInScale 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        #qrcode {
            display: inline-block;
            padding: 25px;
            background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
            border-radius: 15px;
            box-shadow: 
                0 10px 30px rgba(0, 0, 0, 0.15),
                0 0 0 1px rgba(102, 126, 234, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 1);
            transition: transform 0.3s ease;
            position: relative;
            z-index: 1;
        }

        #qrcode:hover {
            transform: scale(1.05);
        }

        .qr-info {
            margin-top: 20px;
            color: #64748b;
            font-size: 14px;
            font-weight: 500;
            word-break: break-all;
            line-height: 1.6;
        }

        .error {
            color: #ef4444;
            font-size: 14px;
            margin-top: 8px;
            display: none;
            font-weight: 500;
            animation: shake 0.5s;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        .error.show {
            display: block;
        }

        /* Footer Styles */
        footer {
            position: relative;
            z-index: 1;
            color: rgba(255, 255, 255, 0.9);
            text-align: center;
            padding: 20px;
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.3px;
            animation: fadeIn 1s ease 0.5s both;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }

        footer a {
            color: #667eea;
            text-decoration: none;
            font-weight: 700;
            background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: all 0.3s ease;
            position: relative;
        }

        footer a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
            transition: width 0.3s ease;
        }

        footer a:hover::after {
            width: 100%;
        }

        footer a:hover {
            transform: translateY(-2px);
        }

        .heart {
            color: #ef4444;
            display: inline-block;
            animation: heartbeat 1.5s infinite;
        }

        @keyframes heartbeat {
            0%, 100% { transform: scale(1); }
            10%, 30% { transform: scale(1.1); }
            20%, 40% { transform: scale(1); }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 40px 30px;
                border-radius: 25px;
            }

            h1 {
                font-size: 28px;
            }

            .logo {
                font-size: 45px;
            }
        }

        @media (max-width: 480px) {
            body {
                padding: 15px;
            }

            .container {
                padding: 30px 20px;
                border-radius: 20px;
            }

            h1 {
                font-size: 24px;
            }

            .logo {
                font-size: 40px;
            }

            .subtitle {
                font-size: 14px;
            }

            .button-group {
                flex-direction: column;
            }

            button {
                padding: 14px 20px;
            }

            input[type="text"],
            input[type="url"] {
                padding: 14px 16px;
                font-size: 15px;
            }

            footer {
                font-size: 13px;
            }

            #qrcode {
                padding: 20px;
            }
        }

        @media (max-width: 360px) {
            .container {
                padding: 25px 15px;
            }

            h1 {
                font-size: 22px;
            }
        }

        /* High DPI screens */
        @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
            button {
                -webkit-font-smoothing: antialiased;
                -moz-osx-font-smoothing: grayscale;
            }
        }