/* General mobile base styles */
        body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
            background-color: #e6f7ff; /* Very light sky blue/white background */
        }
        .container {
            width: 90%; /* Use a percentage for fluid width */
            margin: 0 auto; /* Center the container */
            padding: 10px;
        }

        /* --- Header Styles (Kept dark as requested) --- */
        .header-content {
            text-align: center;
            padding: 20px 0;
            background-color: #1a202c; /* Dark/Navy header background */
        }
        .header-content img {
            max-width: 100px;
            height: auto;
            margin-bottom: 10px;
        }
        .header-content font {
            display: block;
            padding: 5px 0;
        }

        /* --- Form Styles: Sky Blue Theme --- */
        .registration-form {
            background-color: #ffffff; /* White background for the form area */
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0, 153, 255, 0.15); /* Sky blue shadow */
        }

        .registration-form h2 {
            color: #0099ff; /* Sky Blue for heading */
            border-bottom: 2px solid #0099ff;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }

        .registration-form fieldset {
            border: 1px solid #99ccff; /* Light sky blue border */
            padding: 15px;
            margin-bottom: 20px;
            border-radius: 6px;
        }

        .registration-form legend {
            color: #0066cc; /* Medium Sky Blue for legend text */
            font-weight: bold;
            padding: 0 10px;
        }
        
        .registration-form label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: #333333;
        }

        .registration-form input[type="text"],
        .registration-form input[type="email"],
        .registration-form input[type="tel"],
        .registration-form input[type="date"],
        .registration-form input[type="month"],
        .registration-form select {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            box-sizing: border-box;
            border: 1px solid #b3e0ff; /* Very light sky blue border for inputs */
            border-radius: 4px;
            transition: border-color 0.3s;
        }
        /* Highlight input on focus */
        .registration-form input:focus,
        .registration-form select:focus {
            border-color: #0099ff; /* Sky Blue highlight on focus */
            outline: none;
            box-shadow: 0 0 5px rgba(0, 153, 255, 0.6);
        }


        /* Styling buttons for sky blue theme */
        .registration-form button {
            width: 100%;
            padding: 15px;
            margin-top: 10px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
        }

        .registration-form button[type="submit"] {
            background-color: #0099ff; /* Sky Blue Submit Button */
            color: white;
            transition: background-color 0.3s;
        }
        .registration-form button[type="submit"]:hover {
            background-color: #0066cc; /* Darker sky blue on hover */
        }
        
        .registration-form button[type="reset"] {
            background-color: #80c0ff; /* Muted Sky Blue Reset Button */
            color: white;
            transition: background-color 0.3s;
        }
        .registration-form button[type="reset"]:hover {
            background-color: #59a6ff;
        }

        /* Styling for the terms link */
        .terms a {
            color: #0099ff;
            text-decoration: none;
        }