* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e7ec 100%);
            color: #333;
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Animated Header Styles */
        header {
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
            background: linear-gradient(270deg, #4facfe, #00f2fe, #00cdac, #ff6b6b);
            background-size: 400% 400%;
            animation: GradientBackground 15s ease infinite;
        }

        @keyframes GradientBackground {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.8rem;
            font-weight: 700;
        }

        .logo i {
            font-size: 2rem;
        }

        .nav-desktop {
            display: flex;
            gap: 1.5rem;
        }

        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .nav-mobile.active {
            display: flex;
        }

        .nav-mobile a {
            color: #333;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-mobile a:last-child {
            border-bottom: none;
        }

        .nav-mobile a:hover {
            background-color: #f1f1f1;
            border-radius: 4px;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Main Content */
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            flex: 1;
        }

        .hero {
            text-align: center;
            padding: 2rem;
            background: rgba(255, 255, 255, 0.8);
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #4facfe, #00f2fe, #00cdac);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            animation: GradientText 10s ease infinite;
        }

        @keyframes GradientText {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
            color: #666;
        }

        .converter-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        @media (max-width: 768px) {
            .converter-container {
                grid-template-columns: 1fr;
            }
        }

        .converter-card {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .converter-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
        }

        h2 {
            color: #2d3748;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }

        h2 i {
            color: #4facfe;
        }

        .input-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #4a5568;
        }

        select, input {
            width: 100%;
            padding: 14px 18px;
            background: #f8f9fa;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
            color: #2d3748;
        }

        select:focus, input:focus {
            outline: none;
            border-color: #4facfe;
            box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.3);
        }

        select option {
            background: white;
            color: #2d3748;
        }

        .input-with-icon {
            position: relative;
        }

        .input-with-icon i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #a0aec0;
        }

        .input-with-icon input {
            padding-left: 40px;
        }

        .convert-btn {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            border: none;
            padding: 16px 32px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            width: 100%;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(79, 172, 254, 0.3);
            margin-top: 1rem;
        }

        .convert-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(79, 172, 254, 0.4);
        }

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

        .result {
            margin-top: 2rem;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 8px;
            border-left: 4px solid #4facfe;
        }

        .result h3 {
            color: #2d3748;
            margin-bottom: 0.5rem;
        }

        .result-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #2d3748;
            background: linear-gradient(45deg, #4facfe, #00f2fe);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .wave-visualization {
            margin-top: 2rem;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 8px;
            text-align: center;
        }

        .wave-canvas {
            width: 100%;
            height: 150px;
            background: white;
            border-radius: 8px;
            margin-top: 1rem;
            border: 1px solid #e2e8f0;
        }

        /* Footer */
        footer {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            padding: 3rem 2rem;
            margin-top: auto;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .footer-section h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.5rem;
        }

        .footer-section h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: white;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.8rem;
        }

        .footer-links a {
            color: #e2e8f0;
            text-decoration: none;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }

        .footer-links a i {
            font-size: 0.8rem;
        }

        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
        }

        /* Toggle Switch */
        .toggle-container {
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 2rem 0;
            background: white;
            padding: 1rem;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .toggle-text {
            margin: 0 1rem;
            font-weight: 600;
            color: #4a5568;
        }

        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 30px;
        }

        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, #4facfe, #00f2fe);
            transition: .4s;
            border-radius: 34px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 22px;
            width: 22px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background: linear-gradient(135deg, #00f2fe, #4facfe);
        }

        input:checked + .slider:before {
            transform: translateX(30px);
        }

        /* Electromagnetic Spectrum */
        .spectrum {
            margin-top: 3rem;
            padding: 1.5rem;
            background: white;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        .spectrum-visual {
            height: 40px;
            background: linear-gradient(90deg, 
                #8b00ff, #4b0082, #0000ff, #00ff00, #ffff00, #ff7f00, #ff0000);
            border-radius: 4px;
            margin: 1rem 0;
            position: relative;
        }

        .spectrum-labels {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: #4a5568;
        }

        .marker {
            position: absolute;
            top: -10px;
            width: 2px;
            height: 60px;
            background: #2d3748;
            transform: translateX(-50%);
        }