:root {
            --primary-color: #A36ABF; 
            --secondary-color: #6A1B9A; 
            --accent-color: #ff4081;
            --dark-color: #4A148C; 
            --light-color: #f3e5f5;
            --text-color: #333;
            --light-text: #fff;
            --card-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            --success-color: #4caf50;
            --error-color: #f44336;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: var(--text-color);
            min-height: 100vh;
        }

        .account-nav {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); 
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .account-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
        }

        .logo a {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: var(--light-text);
        }

        .logo img {
            height: 100px;
            margin-right: 10px;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 700;
            font-family: 'Quicksand', sans-serif;
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li a {
            color: var(--light-text);
            text-decoration: none;
            margin: 0 15px;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links li a:hover {
            color: #ffeb3b;
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background-color: #ffeb3b;
            transition: width 0.3s ease;
        }

        .nav-links li a:hover::after {
            width: 100%;
        }

        .account-container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 20px;
        }

        .welcome-section {
            text-align: center;
            margin-bottom: 3rem;
            animation: fadeIn 1s ease;
        }

        .welcome-title {
            font-size: 2.5rem;
            color: var(--secondary-color); 
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .welcome-subtitle {
            font-size: 1.2rem;
            color: var(--dark-color);
            max-width: 700px;
            margin: 0 auto;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            margin-top: 1rem;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .back-link:hover {
            color: var(--secondary-color);
            transform: translateX(-5px);
        }

        .back-link i {
            margin-right: 8px;
            transition: transform 0.3s ease;
        }

        .back-link:hover i {
            transform: translateX(-3px);
        }

        .settings-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-bottom: 3rem;
        }

        .settings-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            animation: slideUp 0.6s ease;
        }

        .settings-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }

        .card-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); 
            color: white;
            padding: 1.5rem;
            text-align: center;
        }

        .card-header i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .card-header h3 {
            font-size: 1.5rem;
            margin: 0;
        }

        .card-body {
            padding: 1.5rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--dark-color);
        }

        .form-input {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-input:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(163, 106, 191, 0.2);
            outline: none;
        }

        .form-input:disabled {
            background-color: #f5f5f5;
            color: #9e9e9e;
            cursor: not-allowed;
        }

        .password-toggle {
            position: relative;
        }

        .password-toggle i {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #9e9e9e;
            transition: color 0.3s ease;
        }

        .password-toggle i:hover {
            color: var(--primary-color);
        }

        .btn-save {
            display: block;
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-save:hover {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .notification-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px solid #f0f0f0;
        }

        .notification-item:last-child {
            border-bottom: none;
        }

        .notification-text {
            flex: 1;
        }

        .notification-text p {
            margin: 0;
            font-weight: 500;
        }

        .notification-text small {
            color: #757575;
        }

        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: var(--primary-color);
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .account-footer {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 2rem 0;
            text-align: center;
            margin-top: 3rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: space-around;
            width: 30px;
            height: 25px;
            cursor: pointer;
            z-index: 1100;
        }

        .hamburger .bar {
            width: 100%;
            height: 3px;
            background-color: white;
            border-radius: 10px;
            transition: all 0.3s ease;
        }

        .hamburger.active .bar:nth-child(1) {
            transform: translateY(11px) rotate(45deg);
        }

        .hamburger.active .bar:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active .bar:nth-child(3) {
            transform: translateY(-11px) rotate(-45deg);
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
            20%, 40%, 60%, 80% { transform: translateX(5px); }
        }

        .shake {
            animation: shake 0.5s;
        }

        .success-message {
            background-color: rgba(76, 175, 80, 0.1);
            color: var(--success-color);
            padding: 12px;
            border-radius: 8px;
            margin-top: 1rem;
            display: none;
            animation: fadeIn 0.5s ease;
        }

        .error-message {
            background-color: rgba(244, 67, 54, 0.1);
            color: var(--error-color);
            padding: 12px;
            border-radius: 8px;
            margin-top: 1rem;
            display: none;
            animation: fadeIn 0.5s ease;
        }

        @media (max-width: 768px) {
            .account-nav-container {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
                padding: 10px 20px;
            }

            .hamburger {
                display: flex;
                order: 1;
            }

            .logo {
                order: 0;
            }

            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                display: none;
                opacity: 0;
                transform: translateY(-10px);
                transition: opacity 0.3s ease, transform 0.3s ease;
                box-shadow: 0 8px 16px rgba(0,0,0,0.2);
                z-index: 999;
            }

            .nav-links.active {
                display: flex;
                opacity: 1;
                transform: translateY(0);
            }

            .nav-links li {
                margin: 10px 0;
                width: 100%;
                text-align: center;
            }

            .nav-links li a {
                padding: 10px 0;
                display: block;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                margin: 0;
            }
            
            .nav-links li:last-child a {
                border-bottom: none;
            }

            .welcome-title {
                font-size: 2rem;
            }

            .settings-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .account-nav-container {
                padding: 10px;
            }
            
            .logo img {
                height: 80px;
            }
            
            .welcome-title {
                font-size: 1.8rem;
            }
            
            .welcome-subtitle {
                font-size: 1rem;
            }
        }