:root {
            --primary-color: #2ecc71;
            --primary-dark: #27ae60;
            --secondary-color: #2c3e50;
            --accent-color: #3498db;
            --danger-color: #e74c3c;
            --warning-color: #f39c12;
            --success-color: #27ae60;
            --light-color: #ecf0f1;
            --dark-color: #34495e;
            --text-color: #2c3e50;
            --text-light: #7f8c8d;
            --border-color: #bdc3c7;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, var(--secondary-color), #1a252f);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.03)"/></svg>');
            background-size: cover;
            opacity: 0.1;
        }

        /* Contenedor principal */
        .login-container {
            width: 100%;
            max-width: 440px;
            position: relative;
            z-index: 1;
        }

        .login-wrapper {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.2);
            position: relative;
        }

        /* Header con gradiente animado */
        .login-header {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark), var(--accent-color));
            background-size: 300% 300%;
            animation: gradientShift 8s ease infinite;
            padding: 50px 30px 40px;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .login-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
            opacity: 0.1;
        }

        .logo-container {
            width: 120px;
            height: 120px;
            margin: 0 auto 25px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            border: 6px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .logo-container:hover {
            transform: scale(1.05) rotate(5deg);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
        }

        .logo-container img {
            width: 70%;
            height: 70%;
            object-fit: contain;
            transition: var(--transition);
        }

        .login-header h1 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }

        .login-header p {
            font-size: 15px;
            opacity: 0.95;
            font-weight: 300;
            max-width: 300px;
            margin: 0 auto;
            line-height: 1.5;
        }

        /* Body del login */
        .login-body {
            padding: 50px 40px;
        }

        .login-form, .reset-form {
            animation: slideUp 0.6s ease-out;
        }

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

        .form-group {
            margin-bottom: 30px;
        }

        .form-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: var(--text-color);
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .input-with-icon {
            position: relative;
            display: flex;
            align-items: center;
        }

        .input-icon {
            position: absolute;
            left: 18px;
            color: var(--text-light);
            font-size: 18px;
            z-index: 2;
            transition: var(--transition);
        }

        .form-control {
            width: 100%;
            padding: 18px 20px 18px 55px;
            border: 2px solid var(--border-color);
            border-radius: 12px;
            font-size: 16px;
            background: white;
            transition: var(--transition);
            outline: none;
            color: var(--text-color);
            font-family: inherit;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 4px rgba(46, 204, 113, 0.15);
        }

        .form-control:focus + .input-icon {
            color: var(--primary-color);
            transform: scale(1.1);
        }

        .password-toggle {
            position: absolute;
            right: 18px;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            font-size: 18px;
            padding: 5px;
            transition: var(--transition);
            z-index: 2;
        }

        .password-toggle:hover {
            color: var(--primary-color);
            transform: scale(1.1);
        }

        /* Mensajes */
        .message {
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 30px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
            animation: fadeIn 0.5s ease;
            border-left: 5px solid;
        }

        .message.error {
            background: linear-gradient(135deg, #ffebee, #ffcdd2);
            color: var(--danger-color);
            border-left-color: var(--danger-color);
        }

        .message.success {
            background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
            color: var(--success-color);
            border-left-color: var(--success-color);
        }

        .message i {
            font-size: 20px;
            flex-shrink: 0;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Botones */
        .button-group {
            display: flex;
            gap: 15px;
            margin-bottom: 25px;
        }

        .btn {
            padding: 18px 30px;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex: 1;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
        }

        .btn-secondary {
            background: var(--light-color);
            color: var(--text-color);
            border: 2px solid var(--border-color);
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .btn:active {
            transform: translateY(-1px);
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: 0.5s;
        }

        .btn:hover::before {
            left: 100%;
        }

        /* Links y recordar */
        .login-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            font-size: 14px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            color: var(--text-color);
            font-weight: 500;
        }

        .remember-me input[type="checkbox"] {
            width: 20px;
            height: 20px;
            accent-color: var(--primary-color);
            cursor: pointer;
            border-radius: 4px;
        }

        .forgot-password {
            color: var(--accent-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 6px;
        }

        .forgot-password:hover {
            color: var(--primary-color);
            background: rgba(46, 204, 113, 0.1);
            text-decoration: none;
        }

        /* Footer */
        .login-footer {
            text-align: center;
            margin-top: 40px;
            padding-top: 25px;
            border-top: 1px solid var(--border-color);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 20px;
        }

        .footer-links a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 6px;
        }

        .footer-links a:hover {
            color: var(--primary-color);
            background: rgba(46, 204, 113, 0.1);
        }

        .copyright {
            color: var(--text-light);
            font-size: 13px;
            opacity: 0.8;
        }

        /* Modal para recuperación */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
            padding: 20px;
            backdrop-filter: blur(5px);
        }

        .modal-overlay.active {
            display: flex;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            background: white;
            border-radius: 20px;
            width: 100%;
            max-width: 500px;
            padding: 40px;
            position: relative;
            animation: slideUp 0.4s ease;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
        }

        .close-modal {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            transition: var(--transition);
        }

        .close-modal:hover {
            color: var(--danger-color);
            transform: rotate(90deg);
        }

        /* Indicador de fortaleza de contraseña */
        .password-strength {
            margin-top: 10px;
            display: none;
        }

        .strength-bar {
            height: 6px;
            background: var(--border-color);
            border-radius: 3px;
            overflow: hidden;
            margin-bottom: 5px;
        }

        .strength-fill {
            height: 100%;
            width: 0%;
            background: var(--danger-color);
            transition: var(--transition);
        }

        .strength-text {
            font-size: 12px;
            color: var(--text-light);
        }

        /* Stats del sistema */
        .system-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
            margin-top: 30px;
            padding-top: 25px;
            border-top: 1px solid var(--border-color);
        }

        .stat-item {
            text-align: center;
            padding: 15px;
            background: rgba(46, 204, 113, 0.05);
            border-radius: 10px;
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(46, 204, 113, 0.1);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1;
        }

        .stat-label {
            font-size: 12px;
            color: var(--text-light);
            margin-top: 5px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .login-body {
                padding: 40px 25px;
            }
            
            .button-group {
                flex-direction: column;
            }
            
            .login-options {
                flex-direction: column;
                gap: 15px;
                align-items: flex-start;
            }
            
            .system-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .login-container {
                max-width: 100%;
            }
            
            .login-header {
                padding: 40px 20px 30px;
            }
            
            .login-body {
                padding: 30px 20px;
            }
            
            .logo-container {
                width: 100px;
                height: 100px;
                margin-bottom: 20px;
            }
            
            .login-header h1 {
                font-size: 28px;
            }
            
            .system-stats {
                grid-template-columns: 1fr;
            }
        }

        /* Efectos de partículas mejorados */
        .particles {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            pointer-events: none;
            z-index: 0;
        }

        .particle {
            position: absolute;
            border-radius: 50%;
            animation: float 20s infinite linear;
            filter: blur(1px);
        }

        @keyframes float {
            0% {
                transform: translateY(100vh) rotate(0deg) scale(0.5);
                opacity: 0;
            }
            10% {
                opacity: 0.3;
            }
            90% {
                opacity: 0.3;
            }
            100% {
                transform: translateY(-100px) rotate(720deg) scale(1.5);
                opacity: 0;
            }
        }