body {
            font-family: 'Inter', sans-serif;
            background-color: #f0f4f8; /* Light blue-gray background */
            color: #334155; /* Dark slate text */
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        .section-card {
            background-color: #ffffff;
            border-radius: 1rem;
            padding: 2.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            transition: transform 0.2s ease-in-out;
        }
        .section-card:hover {
            transform: translateY(-5px);
        }
        h1, h2, h3 {
            color: #1e293b; /* Darker blue-gray for headings */
            font-weight: 700;
        }
        .text-primary {
            color: #0d9488; /* Teal for primary accents */
        }
        .icon {
            font-size: 2.5rem;
            color: #0d9488;
            margin-bottom: 0.75rem;
        }
        .impact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .impact-item {
            background-color: #f8fafc; /* Lighter background for impact items */
            border-radius: 0.75rem;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
        }
        .impact-item-icon {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            color: #0d9488;
        }
        .tier-card {
            border: 2px solid #0d9488;
            background-color: #f0fdfa; /* Very light teal */
            padding: 2rem;
            border-radius: 1rem;
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%; /* Ensure cards are same height in flex container */
        }
        .tier-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #0d9488;
            margin-bottom: 0.5rem;
        }
        .tier-amount {
            font-size: 2.25rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 1rem;
        }
        .tier-impact-list {
            list-style: none;
            padding: 0;
            margin-top: 1rem;
            text-align: left;
        }
        .tier-impact-list li {
            margin-bottom: 0.5rem;
            display: flex;
            align-items: flex-start;
        }
        .tier-impact-list li::before {
            content: '✅';
            margin-right: 0.75rem;
            font-size: 1.2rem;
            color: #10b981; /* Green checkmark */
        }
        .btn-primary {
            background-color: #0d9488;
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 0.75rem;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            margin-top: 1.5rem;
            transition: background-color 0.2s ease-in-out;
        }
        .btn-primary:hover {
            background-color: #0f766e;
        }