* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* Header */
        header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 24px;
            font-weight: bold;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 10px;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 25px;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: #ffcc00;
        }
        
        .btn {
            display: inline-block;
            padding: 10px 20px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .btn-primary {
            background-color: #ffcc00;
            color: #1a237e;
            border: none;
        }
        
        .btn-primary:hover {
            background-color: #ffd633;
            transform: translateY(-2px);
        }
        
        .btn-outline {
            background-color: transparent;
            color: white;
            border: 2px solid white;
        }
        
        .btn-outline:hover {
            background-color: white;
            color: #1a237e;
        }
        
        /* Hero Section */
        .hero {
            padding: 80px 0;
            background: linear-gradient(rgba(26, 35, 126, 0.9), rgba(40, 53, 147, 0.9)), url('https://images.unsplash.com/photo-1604594849809-dfedbc827105?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') no-repeat center center/cover;
            color: white;
            text-align: center;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 20px;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        /* Converter Section */
        .converter {
            background-color: white;
            border-radius: 15px;
            padding: 40px;
            margin: -50px auto 50px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            max-width: 800px;
            position: relative;
        }
        
        .converter-title {
            text-align: center;
            margin-bottom: 30px;
            color: #1a237e;
            font-size: 28px;
        }
        
        .converter-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .input-group {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .input-field {
            flex: 1;
        }
        
        .input-field label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #555;
        }
        
        .input-field input, .input-field select {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s;
        }
        
        .input-field input:focus, .input-field select:focus {
            border-color: #1a237e;
            outline: none;
        }
        
        .switch-btn {
            background-color: #1a237e;
            color: white;
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background-color 0.3s;
            font-size: 20px;
        }
        
        .switch-btn:hover {
            background-color: #283593;
        }
        
        .result {
            text-align: center;
            margin-top: 20px;
            padding: 20px;
            background-color: #f0f5ff;
            border-radius: 8px;
            font-size: 18px;
        }
        
        .result span {
            font-weight: bold;
            color: #1a237e;
            font-size: 24px;
        }
        
        .submit-btn {
            background-color: #1a237e;
            color: white;
            border: none;
            padding: 15px;
            border-radius: 8px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
            margin-top: 10px;
        }
        
        .submit-btn:hover {
            background-color: #283593;
        }
        
        /* Features Section */
        .features {
            padding: 80px 0;
            background-color: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            color: #1a237e;
            font-size: 36px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: #f8f9fa;
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 80px;
            height: 80px;
            background-color: #e0e7ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 30px;
            color: #1a237e;
        }
        
        .feature-card h3 {
            margin-bottom: 15px;
            color: #1a237e;
        }
        
        /* Rates Section */
        .rates {
            padding: 80px 0;
            background-color: #f0f5ff;
        }
        
        .rates-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 30px;
            background-color: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .rates-table th, .rates-table td {
            padding: 15px 20px;
            text-align: center;
        }
        
        .rates-table th {
            background-color: #1a237e;
            color: white;
            font-weight: 600;
        }
        
        .rates-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        
        .rates-table tr:hover {
            background-color: #e0e7ff;
        }
        
        /* How It Works */
        .how-it-works {
            padding: 80px 0;
        }
        
        .steps {
            display: flex;
            justify-content: space-between;
            margin-top: 50px;
            flex-wrap: wrap;
        }
        
        .step {
            flex-basis: calc(25% - 30px);
            text-align: center;
            position: relative;
            margin-bottom: 30px;
        }
        
        .step-number {
            width: 60px;
            height: 60px;
            background-color: #1a237e;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
            margin: 0 auto 20px;
        }
        
        .step:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 30px;
            right: -30%;
            width: 60%;
            height: 2px;
            background-color: #1a237e;
        }
        
        /* Testimonials */
        .testimonials {
            padding: 80px 0;
            background-color: white;
        }
        
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .testimonial-card {
            background-color: #f8f9fa;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
            position: relative;
            padding-left: 30px;
        }
        
        .testimonial-text::before {
            content: '"';
            font-size: 60px;
            position: absolute;
            left: 0;
            top: -20px;
            color: #e0e7ff;
            font-family: serif;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
        }
        
        .author-img {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            margin-right: 15px;
            object-fit: cover;
        }
        
        /* Footer */
        footer {
            background-color: #1a237e;
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-section h3 {
            margin-bottom: 20px;
            font-size: 20px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            transition: background-color 0.3s;
        }
        
        .social-links a:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #ccc;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            .nav-links {
                margin-top: 20px;
                justify-content: center;
            }
            
            .nav-links li {
                margin: 0 10px;
            }
            
            .hero h1 {
                font-size: 36px;
            }
            
            .input-group {
                flex-direction: column;
            }
            
            .switch-btn {
                transform: rotate(90deg);
                margin: 10px 0;
            }
            
            .step {
                flex-basis: calc(50% - 20px);
            }
            
            .step:not(:last-child)::after {
                display: none;
            }
        }