body {
            font-family: 'Inter', sans-serif;
            background-color: #f0f2f5;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .btn-gradient {
            background-image: linear-gradient(to bottom, #3b82f6, #2563eb);
        }

        /* Dark Mode Styles */
        html[data-theme="dark"] body {
            background-color: #1a1a1a;
            color: #e0e0e0;
        }

        html[data-theme="dark"] header,
        html[data-theme="dark"] footer,
        html[data-theme="dark"] .bg-white {
            background-color: #2d2d2d !important;
            color: #e0e0e0;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15); 
        }

        html[data-theme="dark"] .text-gray-800 {
            color: #f0f0f0; 
        }

        html[data-theme="dark"] .text-gray-600 {
            color: #c0c0c0; 
        }

        html[data-theme="dark"] #welcomeMessage {
            background-image: linear-gradient(to right, #4d82ef, #d46677);
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Dark mode toggle icon rotation */
        .moon-icon.rotate-180 {
            transform: rotate(180deg);
        }
        /* Hamburger/X icon animation */
        .open #bar1 {
            transform: translateY(8px) rotate(45deg);
        }
        .open #bar2 {
            opacity: 0;
        }
        .open #bar3 {
            transform: translateY(-8px) rotate(-45deg);
        }
        /* Mobile menu slide down */
        .menu-open {
            transform: translateY(0) !important;
        }

        body.menu-active {
            overflow: hidden;
        }

        #mobileMenu {
            background-color: white; 
            color: black; 
        }

        html[data-theme="dark"] #mobileMenu {
            background-color: #2d2d2d ; 
            color: white;
        }

        #hamburgerIcon span {
            background-color: black;
        }

        html[data-theme="dark"] #hamburgerIcon span {
            background-color: white; 
        }
        .message-box-overlay {
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.6);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 100;
        }
        .message-box-content {
            background-color: white;
            padding: 2rem;
            border-radius: 0.75rem;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            width: 90%;
            max-width: 400px;
            text-align: center;
        }
        .message-box-content h4 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .message-box-content p {
            font-size: 1rem;
            margin-bottom: 1.5rem;
        }
        .message-box-content button {
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 0.5rem;
            font-weight: 600;
            cursor: pointer;
            background-color: #3b82f6; /* blue-500 */
            color: white;
            transition: background-color 0.2s;
        }
        .message-box-content button:hover {
            background-color: #2563eb; /* blue-600 */
        }
        
        .auth-loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.75);
            backdrop-filter: blur(4px);
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            opacity: 0;
            transition: opacity 0.3s ease-in-out;
        }
        .auth-loading-overlay.active {
            display: flex;
            opacity: 1;
        }
        .auth-spinner {
            border: 6px solid #f3f3f3;
            border-top: 6px solid #3b82f6;
            border-radius: 50%;
            width: 60px;
            height: 60px;
            animation: spin 1s linear infinite;
        }
        .auth-loading-text {
            margin-top: 20px;
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            text-align: center;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        /* reCAPTCHA badge styling */
        .grecaptcha-badge {
            opacity: 0.5;
            transition: opacity 0.3s;
        }
        .grecaptcha-badge:hover {
            opacity: 1;
        }