@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;700&display=swap');
        /* --- Basic Reset & Body Styling --- */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background-color: #f4f7f6;
            color: #333;
            line-height: 1.6;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
        }

        /* --- Main Container --- */
        .container {
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            max-width: 700px;
            width: 100%;
            padding: 40px;
            text-align: center;
            border-top: 5px solid #e74c3c; /* Accent color */
        }

        /* --- Header & Typography --- */
        h1 {
            color: #2c3e50;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0;
        }

        .subtitle {
            font-size: 1.2rem;
            color: #e74c3c; /* Red accent */
            font-weight: 700;
            margin-top: 5px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        h2 {
            color: #34495e;
            font-weight: 500;
            font-size: 1.5rem;
            margin-top: 25px;
            margin-bottom: 25px;
        }

        h3 {
            color: #2c3e50;
            border-bottom: 2px solid #f0f0f0;
            padding-bottom: 8px;
            display: inline-block;
            margin-top: 30px;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }

        p {
            color: #555;
            font-size: 1rem;
            margin-bottom: 15px;
        }
        
        hr {
            border: 0;
            height: 1px;
            background-color: #eee;
            margin: 30px 0;
        }

        /* --- Features List --- */
        .features-list {
            list-style-type: none;
            padding: 0;
            text-align: left;
            max-width: 450px;
            margin: 20px auto 0 auto;
        }

        .features-list li {
            position: relative;
            padding-left: 35px;
            margin-bottom: 15px;
            font-size: 1rem;
        }

        .features-list li::before {
            content: '✔️'; /* You can use emoji */
            position: absolute;
            left: 0;
            top: 0;
            color: #27ae60; /* Green check */
            font-size: 1.2rem;
        }
        
        .features-list li strong {
            color: #34495e;
        }

        /* --- Signup Form --- */
        .signup-form {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 20px;
        }

        .signup-form input[type="email"] {
            padding: 14px;
            font-size: 1rem;
            font-family: 'Poppins', sans-serif;
            border: 1px solid #ccc;
            border-radius: 8px;
            flex-grow: 1;
        }

        .signup-form input[type="email"]:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 5px rgba(52,152,219,0.5);
        }

        /* --- Button Styles --- */
        .btn {
            padding: 14px 20px;
            font-size: 1rem;
            font-weight: 700;
            font-family: 'Poppins', sans-serif;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary {
            background-color: #e74c3c;
            color: white;
        }

        .btn-primary:hover {
            background-color: #c0392b;
        }
        
        .btn-secondary {
            background-color: #3498db;
            color: white;
        }
        
        .btn-secondary:hover {
            background-color: #2980b9;
        }

        /* --- Social & Footer --- */
        .social-links {
            margin-top: 20px;
        }

        .social-links a {
            margin: 0 12px;
            text-decoration: none;
            color: #3498db;
            font-weight: 700;
            font-size: 1rem;
        }

        .social-links a:hover {
            text-decoration: underline;
        }

        footer {
            margin-top: 30px;
            font-size: 0.9rem;
            color: #888;
        }

        footer p {
            margin: 5px 0;
            font-size: 0.85rem;
        }
        
        footer a {
            color: #777;
            text-decoration: none;
        }
        footer a:hover {
            text-decoration: underline;
        }

        /* --- Responsive (Mobile-First) --- */
        @media (min-width: 576px) {
            .signup-form {
                flex-direction: row; /* Side-by-side on larger screens */
            }

            h1 {
                font-size: 2.8rem;
            }
        }