/* Estilos iniciales */ 
        :root {
            --primary-green: #00ff30;
            --dark-green: #073000;
            --black: #000000;
            --white: #ffffff;
            --transition-speed: 0.3s;
            --border-radius: 8px;
            --shadow-light: 0 2px 10px rgba(0, 255, 48, 0.1);
            --shadow-heavy: 0 8px 32px rgba(0, 255, 48, 0.2);
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, var(--dark-green) 0%, var(--black) 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            background: var(--white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-light);
            width: 100%;
            max-width: 400px;
            transform: translateY(20px);
            opacity: 0;
            animation: slideIn var(--transition-speed) ease-out forwards;
        }

        @keyframes slideIn {
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .login-title {
            color: var(--dark-green);
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .login-subtitle {
            color: #666;
            font-size: 14px;
            font-weight: 400;
        }

        .form-group {
            margin-bottom: 20px;
            position: relative;
        }

        .form-label {
            display: block;
            color: var(--dark-green);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 8px;
            transform: translateX(0);
            transition: all var(--transition-speed) ease;
        }

        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e1e1e1;
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: all var(--transition-speed) ease;
            background: var(--white);
            color: var(--dark-green);
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary-green);
            box-shadow: 0 0 0 3px rgba(0, 255, 48, 0.1);
            transform: translateY(-2px);
        }

        .form-input:focus + .form-label,
        .form-input:not(:placeholder-shown) + .form-label {
            transform: translateX(4px);
            color: var(--primary-green);
        }

        .password-container {
            position: relative;
        }

        .password-toggle {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #666;
            cursor: pointer;
            padding: 4px;
            transition: color var(--transition-speed) ease;
        }

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

        .forgot-password {
            text-align: right;
            margin-bottom: 25px;
        }

        .forgot-password a {
            color: var(--primary-green);
            text-decoration: none;
            font-size: 14px;
            transition: all var(--transition-speed) ease;
        }

        .forgot-password a:hover {
            color: var(--dark-green);
            text-decoration: underline;
        }

        .login-button {
            width: 100%;
            background: linear-gradient(45deg, var(--primary-green), #00cc28);
            color: var(--white);
            border: none;
            padding: 14px;
            border-radius: var(--border-radius);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            position: relative;
            overflow: hidden;
        }

        .login-button:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-heavy);
        }

        .login-button:active {
            transform: translateY(0);
        }

        .login-button.loading {
            color: transparent;
        }

        .login-button .spinner {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: var(--white);
            animation: spin 1s linear infinite;
            opacity: 0;
            transition: opacity var(--transition-speed) ease;
        }

        .login-button.loading .spinner {
            opacity: 1;
        }

        @keyframes spin {
            to {
                transform: translate(-50%, -50%) rotate(360deg);
            }
        }

        .divider {
            text-align: center;
            margin: 30px 0;
            position: relative;
            color: #666;
            font-size: 14px;
        }

        .divider::before,
        .divider::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 45%;
            height: 1px;
            background: #e1e1e1;
        }

        .divider::before {
            left: 0;
        }

        .divider::after {
            right: 0;
        }

        .social-login {
            display: flex;
            gap: 10px;
            margin-bottom: 25px;
        }

        .social-button {
            flex: 1;
            padding: 12px;
            border: 2px solid #e1e1e1;
            border-radius: var(--border-radius);
            background: var(--white);
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            text-align: center;
            font-weight: 500;
        }

        .social-button:hover {
            border-color: var(--primary-green);
            transform: translateY(-1px);
        }

        .register-link {
            text-align: center;
            color: #666;
            font-size: 14px;
        }

        .register-link a {
            color: var(--primary-green);
            text-decoration: none;
            font-weight: 500;
            transition: color var(--transition-speed) ease;
        }

        .register-link a:hover {
            color: var(--dark-green);
        }

        .error-message {
            background: #ffe6e6;
            color: #d63031;
            padding: 12px;
            border-radius: var(--border-radius);
            font-size: 14px;
            margin-bottom: 20px;
            border-left: 4px solid #d63031;
            transform: translateX(-20px);
            opacity: 0;
            animation: slideInError 0.4s ease-out forwards;
        }

        @keyframes slideInError {
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @media (max-width: 480px) {
            .login-container {
                padding: 30px 20px;
                margin: 10px;
            }
            
            .login-title {
                font-size: 24px;
            }
        }