:root {
            --primary-color: #FF6F61; /* Coral */
            --secondary-color: #6B5B95; /* Purple */
            --accent-color: #88B04B; /* Green */
            --background-color: #f0f8ff; /* Alice Blue */
            --card-bg: rgba(255, 255, 255, 0.9);
            --card-hover-shadow: rgba(0, 0, 0, 0.2);
            --transition-speed: 0.3s;
            --font-family-title: 'Poppins', sans-serif;
            --font-family-text: 'Roboto', sans-serif;
        }

        body {
            font-family: var(--font-family-text);
            background-color: var(--background-color);
            padding-top: 80px; /* Espacio para la navbar fija */
            transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
            color: #333333;
        }

        /* Navbar Styles */
        .navbar {
            background-color: #ffffff;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            height: 70px;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            transition: background-color var(--transition-speed) ease;
        }

        .navbar-brand {
            font-family: var(--font-family-title);
            font-weight: 700;
            color: var(--primary-color) !important;
            font-size: 1.5rem;
        }

        /* Dark Mode Styles */
        body.dark-mode {
            background-color: #1e1e1e;
            color: #e0e0e0;
        }

        body.dark-mode .navbar {
            background-color: #2c2c2c;
        }

        body.dark-mode .card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #e0e0e0;
        }

        body.dark-mode .footer {
            background-color: #2c2c2c;
            color: #888888;
        }

        /* Toggle Switch */
        .form-check.form-switch .form-check-input {
            background-color: var(--primary-color);
        }

        /* Logout Button */
        .logout-btn {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 10px 20px;
            border-radius: 25px;
            font-size: 0.9rem;
            border: none;
            transition: background var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            cursor: pointer;
        }

        .logout-btn:hover {
            box-shadow: 0 4px 12px var(--card-hover-shadow);
        }

        /* Card Styles */
        .card {
            border: none;
            border-radius: 15px;
            transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            background: var(--card-bg);
            box-shadow: 0 6px 10px rgba(0, 0, 0, 0.1);
        }

        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 30px var(--card-hover-shadow);
        }

        .card-header {
            background: var(--primary-color);
            padding: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-top-left-radius: 15px;
            border-top-right-radius: 15px;
        }

        .card-icon {
            font-size: 2.5rem;
            color: #ffffff;
        }

        .card-body {
            padding: 30px;
            text-align: center;
        }

        .card-title {
            font-family: var(--font-family-title);
            font-weight: 600;
            margin-bottom: 15px;
            color: #333333;
        }

        .card-text {
            color: #555555;
            margin-bottom: 25px;
        }

        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            transition: background var(--transition-speed) ease, transform 0.3s ease;
            padding: 12px 24px;
            border-radius: 25px;
            font-weight: 500;
        }

        .btn-primary:hover {
            background-color: var(--primary-color);
            transform: scale(1.05);
        }

        /* Footer Styles */
        .footer {
            background-color: #ffffff;
            color: #888888;
            padding: 25px 0;
            text-align: center;
            border-top: 1px solid #eaeaea;
            margin-top: 50px;
            font-family: var(--font-family-text);
        }

        /* Keyframes for Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsiveness */
        @media (max-width: 576px) {
            .card-header {
                padding: 15px;
            }

            .card-icon {
                font-size: 2rem;
            }

            .navbar-brand {
                font-size: 1.3rem;
            }

            .logout-btn {
                padding: 8px 16px;
                font-size: 0.8rem;
            }

            .card-body {
                padding: 20px;
            }

            .card-title {
                font-size: 1.2rem;
            }

            .card-text {
                font-size: 0.9rem;
            }
        }