:root {
            --primary-blue: #007bff; /* A standard vibrant blue */
            --light-blue: #e6f2ff; /* Very light blue for subtle backgrounds */
            --dark-blue: #0056b3; /* Darker blue for accents/hover states */
            --white: #ffffff;
            --off-white: #f8f9fa; /* Slightly off-white for contrast */
            --gray-text: #495057; /* Dark gray for main text */
            --light-gray-text: #6c757d; /* Lighter gray for secondary text */
            --border-color: #dee2e6; /* Light gray for borders */
            --gradient-blue: linear-gradient(90deg, #007bff, #00c6ff); /* Blue gradient for highlights */
        }

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

        body {
            font-family: 'Arial', sans-serif;
            background-color: var(--off-white);
            color: var(--gray-text);
            line-height: 1.6;
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        header {
            background-color: var(--white);
            padding: 20px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }

        header h1 {
            font-size: 2.8em;
            margin-bottom: 10px;
            color: var(--primary-blue);
            display: inline-block;
        }

        header p {
            font-size: 1.2em;
            color: var(--light-gray-text);
        }

        .top-description-bar {
            background-color: var(--dark-blue);
            color: var(--white);
            padding: 15px 20px;
            text-align: center;
            font-size: 1.1em;
            font-weight: bold;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        .top-description-bar p {
            margin: 0;
            color: inherit;
        }

        .how-it-works-section {
            padding: 60px 20px;
            background-color: var(--light-blue);
            text-align: center;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .how-it-works-section h2 {
            font-size: 2.5em;
            margin-bottom: 40px;
            color: var(--primary-blue);
            display: inline-block;
        }

        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 30px;
            max-width: 800px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            align-items: center;
            background-color: var(--white);
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--border-color);
            text-align: left;
        }

        .step-item .step-number {
            font-size: 2em;
            font-weight: bold;
            color: var(--primary-blue);
            margin-right: 20px;
            flex-shrink: 0;
            width: 40px;
            text-align: center;
        }

        .step-item h3 {
            font-size: 1.6em;
            color: var(--gray-text);
            margin-bottom: 5px;
        }

        .step-item p {
            color: var(--light-gray-text);
            font-size: 1.1em;
        }

        .hero-section {
            text-align: center;
            padding: 80px 20px;
            background-color: var(--light-blue); /* Can be slightly different from how-it-works to break up sections */
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, var(--primary-blue) 0%, transparent 70%);
            opacity: 0.1;
            filter: blur(50px);
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, var(--primary-blue) 0%, transparent 70%);
            opacity: 0.1;
            filter: blur(50px);
        }

        .hero-section h2 {
            font-size: 3em;
            margin-bottom: 20px;
            color: var(--primary-blue);
            display: inline-block;
        }

        .hero-section p {
            font-size: 1.3em;
            margin-bottom: 40px;
            color: var(--gray-text);
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .download-form {
            background-color: var(--white);
            padding: 30px;
            border-radius: 10px;
            max-width: 600px;
            margin: 0 auto;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border: 1px solid var(--border-color);
        }

        .download-form input[type="text"] {
            width: calc(100% - 140px);
            padding: 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            background-color: var(--off-white);
            color: var(--gray-text);
            font-size: 1.1em;
            margin-right: 10px;
        }

        .download-form input[type="text"]::placeholder {
            color: var(--light-gray-text);
        }

        .download-form button {
            width: 120px;
            padding: 15px;
            background: var(--gradient-blue);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1.1em;
            font-weight: bold;
            transition: background 0.3s ease;
        }

        .download-form button:hover {
            background: var(--dark-blue);
        }

        .features-section {
            padding: 60px 20px;
            background-color: var(--off-white);
            text-align: center;
        }

        .features-section h2 {
            font-size: 2.5em;
            margin-bottom: 40px;
            color: var(--primary-blue);
            display: inline-block;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .feature-item {
            background-color: var(--white);
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--border-color);
            transition: transform 0.3s ease;
        }

        .feature-item:hover {
            transform: translateY(-5px);
        }

        .feature-item h3 {
            font-size: 1.8em;
            color: var(--primary-blue);
            margin-bottom: 15px;
        }

        .feature-item p {
            color: var(--gray-text);
            font-size: 1.1em;
        }

        .ads-section {
            padding: 40px 20px;
            background-color: var(--off-white);
            text-align: center;
            border-top: 1px solid var(--border-color);
        }

        .ads-section h2 {
            font-size: 2em;
            margin-bottom: 20px;
            color: var(--gray-text);
        }

        .ad-slot {
            background-color: var(--white);
            border: 1px dashed var(--primary-blue);
            min-height: 90px;
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--light-gray-text);
            font-size: 1.2em;
            margin-bottom: 20px;
            border-radius: 5px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            width: 100%;
            overflow: hidden;
            padding: 10px;
            text-align: center;
        }

        .ad-slot > * {
            max-width: 100%;
            height: auto;
            display: block;
            margin: auto;
        }
        .ad-slot img, .ad-slot iframe {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .cta-section {
            background: var(--gradient-blue);
            padding: 60px 20px;
            text-align: center;
            color: white;
        }

        .cta-section h2 {
            font-size: 2.8em;
            margin-bottom: 20px;
            text-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }

        .cta-section p {
            font-size: 1.3em;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .cta-button {
            display: inline-block;
            padding: 18px 40px;
            background-color: var(--white);
            color: var(--primary-blue);
            text-decoration: none;
            border-radius: 50px;
            font-size: 1.4em;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }

        .cta-section .cta-button:hover {
            background-color: var(--off-white);
            transform: translateY(-3px);
        }

        footer {
            background-color: var(--white);
            padding: 30px 0;
            text-align: center;
            color: var(--light-gray-text);
            font-size: 0.9em;
            border-top: 1px solid var(--border-color);
            box-shadow: 0 -2px 4px rgba(0,0,0,0.03);
        }

        footer nav a {
            color: var(--light-gray-text);
            text-decoration: none;
            margin: 0 15px;
            transition: color 0.3s ease;
        }

        footer nav a:hover {
            color: var(--primary-blue);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            header h1 {
                font-size: 2em;
            }
            .hero-section h2 {
                font-size: 2.2em;
            }
            .hero-section p {
                font-size: 1.1em;
            }
            .download-form input[type="text"] {
                width: 100%;
                margin-right: 0;
                margin-bottom: 15px;
            }
            .download-form button {
                width: 100%;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                flex-direction: column;
                text-align: center;
            }
            .step-item .step-number {
                margin-right: 0;
                margin-bottom: 10px;
            }
            .cta-section h2 {
                font-size: 2em;
            }
            .cta-section p {
                font-size: 1.1em;
            }
            .cta-section .cta-button {
                font-size: 1.2em;
                padding: 15px 30px;
            }
            .top-description-bar {
                font-size: 0.9em;
                padding: 10px 15px;
            }
            .ad-slot {
                min-height: 50px;
                font-size: 0.9em;
                padding: 5px;
            }
        }