in this codes index.php (<?php
session_start();

// Check if a user is already logged in
if (isset($_SESSION['admin_id'])) {
    header("Location: admin_dashboard.php");
    exit();
} elseif (isset($_SESSION['patient_id'])) {
    header("Location: patient_dashboard.php");
    exit();
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Patient Health Record System</title>
    <!-- Link to the external CSS file (optional) -->
    <link rel="stylesheet" href="css/styles.css">
    <style>
        /* Import Google Fonts for modern typography */
        @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

        /* Custom CSS for modern design with gradients and animations */
        body {
            background-image: url('images/background-image-admin.jpg');
            background-size: cover; /* Cover the entire background */
            background-position: center; /* Center the background image */
            background-repeat: no-repeat;
            font-family: 'Roboto', Arial, sans-serif;
            margin: 0;
            padding: 0;
            height: 100vh; /* Full viewport height */
            display: flex;
            justify-content: center; /* Center horizontally */
            align-items: center;     /* Center vertically */
            position: relative;
            overflow: hidden;
        }

        /* Gradient Overlay for enhanced visual appeal */
        .overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            /* Linear gradient overlay */
            background: linear-gradient(135deg, rgba(79, 63, 2, 0.8), rgba(209, 194, 135, 0.8));
            z-index: 1;
            opacity: 0;
            animation: overlayFadeIn 2s forwards;
        }

        /* Fade-in animation for the overlay */
        @keyframes overlayFadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* Container Styling */
        .container {
            position: relative;
            background: rgba(255, 255, 255, 0.85); /* Semi-transparent white background */
            padding: 50px 40px;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            text-align: center;
            max-width: 450px;
            width: 90%;
            z-index: 2; /* Above the overlay */
            transform: translateY(-50px);
            animation: slideUp 1s ease-out forwards;
        }

        /* Slide-up animation for the container */
        @keyframes slideUp {
            to {
                transform: translateY(0);
                opacity: 1;
            }
            from {
                transform: translateY(-50px);
                opacity: 0;
            }
        }

        /* Dashboard Header */
        .dashboard-header {
            background: linear-gradient(135deg, #4F3F02, #D1C287);
            color: #ffffff;
            padding: 20px 30px;
            border-radius: 10px;
            margin-bottom: 30px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
        }

        .dashboard-header h1 {
            font-size: 28px;
            margin: 0;
            font-weight: 700;
            letter-spacing: 1px;
            color:white;
        }

        /* Introductory Text */
        p {
            font-size: 18px;
            margin-bottom: 40px;
            color: #333333;
            line-height: 1.6;
        }

        /* Login Options */
        .login-options {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .login-options a {
            flex: 1 1 45%;
            padding: 15px 0;
            border: none;
            border-radius: 8px;
            text-decoration: none;
            font-size: 18px;
            font-weight: 700;
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        /* Primary Button (Admin Login) */
        .btn-primary {
            background: linear-gradient(135deg, #D1C287, #4F3F02);
            color: #ffffff;
        }

        .btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
        }

        /* Secondary Button (Patient Login) */
        .btn-secondary {
            background: linear-gradient(135deg, #4F3F02, #D1C287);
            color: #ffffff;
        }

        .btn-secondary:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 40px 30px;
            }

            .dashboard-header h1 {
                font-size: 24px;
            }

            p {
                font-size: 16px;
                margin-bottom: 30px;
            }

            .login-options {
                gap: 15px;
            }

            .login-options a {
                flex: 1 1 100%;
                font-size: 16px;
                padding: 12px 0;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 30px 20px;
            }

            .dashboard-header h1 {
                font-size: 22px;
            }

            p {
                font-size: 14px;
                margin-bottom: 25px;
            }

            .login-options a {
                font-size: 14px;
                padding: 10px 0;
            }
        }
    </style>
</head>
<body>
    <div class="overlay"></div> <!-- Gradient Overlay -->
    <div class="container">
        <div class="dashboard-header">
            <h1>Patient Health Record System</h1>
        </div>
        <p>Please select your login type to continue:</p>
        <div class="login-options">
            <a href="admin_login.php" class="btn-primary">Admin Login</a>
            <a href="patients/patient_login.php" class="btn-secondary">Patient Login</a>
        </div>
    </div>

    <!-- Optional: Additional Animations or JavaScript can be added here -->

</body>
</html>) i want you to add this logo (images/white-logo.png) and shouldknow this white logo and type full codes