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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
            background: #f5f5f5;
            min-height: 100vh;
            padding: 20px;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 5px 40px;
            background: white;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-icon {
            width: 150px;
            height: auto;
            display: block;
        }

        .logo h1 {
            font-size: 24px;
            font-weight: 700;
            color: #000;
        }

        .header-actions {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .language-select {
            padding: 8px 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            background: white;
            font-size: 14px;
            cursor: pointer;
        }

        .header-btn {
            padding: 10px 24px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            border: none;
        }

        .btn-login {
            background: #179953;
            color: white;
        }

        .btn-signup {
            background: white;
            color: #179953;
            border: 1px solid #179953;
        }

        .container {
            background: white;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            padding: 50px 40px;
            max-width: 480px;
            width: 100%;
            margin: 120px auto 40px;
        }

        .page-title {
            text-align: center;
            font-size: 24px;
            font-weight: 600;
            color: #000;
            margin-bottom: 40px;
        }

        .form-container {
            display: none;
        }

        .form-container.active {
            display: block;
        }

        .social-buttons {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 30px;
        }

        .btn-social {
            width: 100%;
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: 8px;
            background: white;
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            transition: all 0.2s;
            color: #333;
        }

        .btn-social:hover {
            background: #f9f9f9;
            border-color: #aaa;
        }

        .btn-facebook {
            color: #1877f2;
        }

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

        label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 400;
            font-size: 14px;
        }

        input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 15px;
            transition: all 0.2s;
        }

        input:focus {
            outline: none;
            border-color: #179953;
        }

        input.error {
            border-color: #e74c3c;
        }

        .error-message {
            color: #e74c3c;
            font-size: 12px;
            margin-top: 5px;
        }

        .password-toggle {
            position: absolute;
            right: 15px;
            top: 38px;
            cursor: pointer;
            color: #999;
            font-size: 13px;
            user-select: none;
        }

        .forgot-password {
            text-align: right;
            margin-top: -10px;
            margin-bottom: 15px;
        }

        .forgot-password a {
            color: #666;
            font-size: 13px;
            text-decoration: underline;
            cursor: pointer;
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
        }

        .checkbox-group input[type="checkbox"] {
            width: auto;
            cursor: pointer;
        }

        .checkbox-group label {
            margin: 0;
            font-size: 14px;
            font-weight: 400;
            cursor: pointer;
        }

        .btn {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }

        .btn-primary {
            background: #179953;
            color: white;
        }

        .btn-primary:hover {
            background: green;
        }

        .btn-primary:disabled {
            background: #ddd;
            cursor: not-allowed;
        }

        .btn-secondary {
            background: white;
            color: #179953;
            border: 1px solid #179953;
        }

        .btn-secondary:hover {
            background: #f9f9f9;
        }

        .btn-outline {
            background: white;
            color: #333;
            border: 1px solid #ddd;
        }

        .btn-outline:hover {
            background: #f9f9f9;
        }

        .divider {
            display: flex;
            align-items: center;
            margin: 30px 0;
            color: #999;
            font-size: 14px;
            font-weight: 400;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: #e0e0e0;
        }

        .divider span {
            padding: 0 20px;
        }

        .toggle-form {
            text-align: center;
            margin-top: 30px;
            padding-top: 30px;
            border-top: 1px solid #e0e0e0;
            color: #666;
            font-size: 15px;
        }

        .toggle-form a {
            color: #000;
            text-decoration: none;
            font-weight: 500;
            cursor: pointer;
            display: block;
            margin-top: 15px;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 8px;
            transition: all 0.2s;
        }

        .toggle-form a:hover {
            background: #f9f9f9;
        }

        .user-info {
            text-align: center;
        }

        .user-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin: 0 auto 20px;
            background: #179953;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 32px;
            font-weight: bold;
        }

        .user-avatar img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            object-fit: cover;
        }

        .user-name {
            font-size: 24px;
            color: #333;
            margin-bottom: 5px;
        }

        .user-email {
            color: #666;
            margin-bottom: 30px;
        }

        .alert {
            padding: 12px 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .alert-error {
            background: #fee;
            color: #c33;
            border: 1px solid #fcc;
        }

        .alert-success {
            background: #efe;
            color: #3c3;
            border: 1px solid #cfc;
        }

        .loading {
            display: none;
            text-align: center;
            padding: 20px;
        }

        .loading.active {
            display: block;
        }

        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #179953;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @media (max-width: 768px) {
            .header {
                padding: 15px 20px;
            }
            
            .container {
                padding: 40px 30px;
                margin-top: 100px;
            }
            
            .logo h1 {
                font-size: 20px;
            }
        }