:root {
            --primary: #00C853;
            --primary-dark: #009624;
            --primary-light: #5EFC82;
            --secondary: #2962FF;
            --dark: #263238;
            --gray: #607D8B;
            --light-gray: #ECEFF1;
            --white: #FFFFFF;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --radius: 12px;
            --gradient: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        }

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

        body {
            background-color: #f9fafb;
            color: var(--dark);
            line-height: 1.6;
        }

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

        /* Header Styles */
        header {
            background: var(--white);
            box-shadow: var(--shadow);
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 24px;
            color: var(--primary-dark);
        }

        .logo i {
            color: var(--primary);
        }

        /* Hero Section */
        .hero {
            text-align: center;
            padding: 80px 0 50px;
            background: var(--gradient);
            color: var(--white);
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 40px;
        }

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 16px;
            font-weight: 800;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }

        /* Mission Statement */
        .mission-statement {
            background: var(--white);
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 0 auto 40px;
            max-width: 900px;
            text-align: center;
            border-left: 5px solid var(--primary);
        }

        .mission-statement h2 {
            color: var(--primary-dark);
            margin-bottom: 20px;
            font-size: 1.8rem;
        }

        .mission-statement p {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .highlight {
            background: var(--primary-light);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* Support Tiers */
        .support-section {
            padding: 20px 0 60px;
        }

        .section-title {
            text-align: center;
            margin-bottom: 40px;
            font-size: 2.2rem;
            color: var(--dark);
            font-weight: 700;
        }

        .tiers-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .tier-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .tier-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .popular {
            border: 2px solid var(--primary);
            transform: scale(1.03);
        }

        .popular:hover {
            transform: scale(1.03) translateY(-5px);
        }

        .badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--primary);
            color: var(--white);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .tier-name {
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 700;
        }

        .tier-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 5px;
        }

        .tier-interval {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .tier-purpose {
            margin: 20px 0;
            flex-grow: 1;
            background: var(--light-gray);
            padding: 20px;
            border-radius: var(--radius);
        }

        .tier-purpose h4 {
            color: var(--primary-dark);
            margin-bottom: 10px;
            font-size: 1.1rem;
        }

        .tier-purpose p {
            color: var(--dark);
            font-size: 0.95rem;
        }

        .appreciation-note {
            background: #E8F5E9;
            border-left: 4px solid var(--primary);
            padding: 15px;
            margin: 15px 0;
            border-radius: 4px;
        }

        .appreciation-note i {
            color: var(--primary);
            margin-right: 8px;
        }

        .support-btn {
            background: var(--gradient);
            color: var(--white);
            border: none;
            padding: 16px;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: auto;
        }

        .support-btn:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }

        /* Custom Amount Section */
        .custom-amount {
            background: var(--white);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
            max-width: 600px;
            margin: 0 auto;
        }

        .custom-amount h3 {
            text-align: center;
            margin-bottom: 25px;
            font-size: 1.8rem;
            color: var(--dark);
        }

        .custom-purpose {
            text-align: center;
            margin-bottom: 20px;
            color: var(--gray);
            font-style: italic;
        }

        .input-group {
            display: flex;
            margin-bottom: 25px;
        }

        .currency {
            background: var(--light-gray);
            padding: 16px 20px;
            border-radius: var(--radius) 0 0 var(--radius);
            font-weight: 600;
            color: var(--dark);
        }

        .amount-input {
            flex: 1;
            padding: 16px;
            border: 2px solid var(--light-gray);
            border-left: none;
            border-right: none;
            font-size: 1.1rem;
            outline: none;
            transition: var(--transition);
        }

        .amount-input:focus {
            border-color: var(--primary-light);
        }

        .amount-actions {
            display: flex;
            gap: 10px;
        }

        .quick-amount {
            background: var(--light-gray);
            border: none;
            padding: 10px 15px;
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 500;
        }

        .quick-amount:hover {
            background: var(--primary-light);
        }

        .custom-btn {
            background: var(--secondary);
            color: var(--white);
            border: none;
            padding: 16px 30px;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            flex: 1;
        }

        .custom-btn:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }

        /* Modal */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .modal {
            background: var(--white);
            border-radius: var(--radius);
            padding: 40px;
            max-width: 500px;
            width: 90%;
            box-shadow: var(--shadow);
            transform: translateY(20px);
            transition: var(--transition);
            text-align: center;
        }

        .modal-overlay.active .modal {
            transform: translateY(0);
        }

        .modal-icon {
            font-size: 3.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .modal h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .modal p {
            margin-bottom: 25px;
            color: var(--gray);
        }

        .modal-btn {
            background: var(--primary);
            color: var(--white);
            border: none;
            padding: 14px 30px;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .modal-btn:hover {
            background: var(--primary-dark);
        }

        /* Email Modal */
        .email-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }

        .email-modal.active {
            display: flex;
        }

        .email-form {
            background: var(--white);
            padding: 30px;
            border-radius: var(--radius);
            width: 90%;
            max-width: 400px;
        }

        .email-form h3 {
            margin-bottom: 20px;
            text-align: center;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .form-group input {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--light-gray);
            border-radius: var(--radius);
            font-size: 1rem;
        }

        .form-group input:focus {
            border-color: var(--primary);
            outline: none;
        }

        .form-actions {
            display: flex;
            gap: 10px;
        }

        .form-btn {
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
        }

        .cancel-btn {
            background: var(--light-gray);
        }

        .submit-btn {
            background: var(--primary);
            color: white;
        }

        /* Loading Spinner */
        .spinner {
            display: none;
            width: 40px;
            height: 40px;
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            border-top: 4px solid var(--primary);
            animation: spin 1s linear infinite;
            margin: 20px auto;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Footer */
        footer {
            background: var(--dark);
            color: var(--white);
            padding: 40px 0;
            text-align: center;
        }

        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--white);
        }

        .footer-links {
            display: flex;
            gap: 25px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-links a {
            color: var(--light-gray);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary-light);
        }

        .copyright {
            margin-top: 20px;
            color: var(--gray);
            font-size: 0.9rem;
        }

        /* Responsive Styles */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .tiers-container {
                grid-template-columns: 1fr;
            }

            .popular {
                transform: scale(1);
            }

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

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

            .currency {
                border-radius: var(--radius) var(--radius) 0 0;
                text-align: center;
            }

            .amount-input {
                border: 2px solid var(--light-gray);
                border-radius: 0 0 var(--radius) var(--radius);
                border-top: none;
            }

            .amount-actions {
                flex-direction: column;
            }
        }