body {
            font-family: 'Noto Sans KR', sans-serif;
            color: #333;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            position: relative;
            background-color: #f4f7f9;
        }

        body::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('../bg_192010801.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.9;
            z-index: -1;
        }

        /* --- 로그인 화면 스타일 --- */
        #login-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }

        #login-overlay.hidden {
            display: none;
        }

        #login-box {
            background: white;
            padding: 30px 40px;            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            text-align: center;
        }

        #login-box h2 {
            margin-top: 0;
            color: #2c3e50;
        }

        #login-box input {
            display: block;
            width: 100%;
            padding: 12px;
            font-size: 16px;
            border-radius: 8px;
            border: 1px solid #ddd;
            margin-top: 10px;
            box-sizing: border-box;
        }

        #login-box button {
            margin-top: 20px;
            width: 100%;
            padding: 12px;
            font-size: 16px;
            border-radius: 8px;
            border: none;
            background-color: #3498db;            color: white;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        #login-box button:hover {
            background-color: #2980b9;
        }

        /* --- 메인 콘텐츠 스타일 --- */
        #main-content {
            display: none;
        }

        #main-content.active {
            display: block;
        }

        .container {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 700px;
            text-align: center;
        }

        .header {            margin-bottom: 30px;
            border-bottom: 2px solid #ecf0f1;
            padding-bottom: 20px;
        }

        .header h1 {
            font-size: 28px;
            font-weight: 700;
            color: #2c3e50;
            margin: 0;
        }

        .header p {
            font-size: 16px;
            color: #7f8c8d;
            margin-top: 10px;
        }

        /* --- 탭 스타일 --- */
        .tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
            border-bottom: 2px solid #ecf0f1;
        }

        .tab-button {
            flex: 1;
            padding: 12px 20px;
            background: none;            border: none;
            color: #7f8c8d;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
        }

        .tab-button:hover {
            color: #3498db;
        }

        .tab-button.active {
            color: #3498db;
            border-bottom-color: #3498db;
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        /* --- 다운로드 섹션 --- */
        .download-links {
            margin: 20px 0;
        }
        .download-links a {
            display: block;
            background-color: #3498db;
            color: white;
            padding: 15px 20px;
            margin: 10px 0;
            border-radius: 8px;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: background-color 0.3s ease;
        }

        .download-links a:hover {
            background-color: #2980b9;
        }

        .download-links a.disabled {
            background-color: #95a5a6;
            cursor: not-allowed;
            opacity: 0.6;
        }

        .file-info {
            font-size: 12px;
            color: #7f8c8d;
            margin-top: 5px;
        }

        /* --- 검사 실행 섹션 --- */        .method-selector {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 30px 0;
        }

        .method-btn {
            padding: 20px;
            border: 2px solid #ecf0f1;
            border-radius: 12px;
            background: white;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }

        .method-btn:hover {
            border-color: #3498db;
            box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
        }

        .method-btn.active {
            border-color: #3498db;
            background: #f0f8ff;
        }

        .method-btn .icon {
            font-size: 36px;
            margin-bottom: 10px;
            display: block;        }

        .method-btn h3 {
            margin: 10px 0;
            color: #2c3e50;
            font-size: 18px;
        }

        .method-btn p {
            margin: 5px 0;
            color: #7f8c8d;
            font-size: 14px;
        }

        .method-btn small {
            color: #95a5a6;
            font-size: 12px;
        }

        .company-input {
            margin: 20px 0;
            text-align: left;
        }

        .company-input label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #2c3e50;
        }

        .company-input select {            width: 100%;
            padding: 10px;
            font-size: 16px;
            border: 1px solid #ddd;
            border-radius: 8px;
            box-sizing: border-box;
        }

        .primary-btn {
            width: 100%;
            padding: 15px;
            font-size: 18px;
            font-weight: 600;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: transform 0.2s ease;
        }

        .primary-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .primary-btn:disabled {
            background: #95a5a6;
            cursor: not-allowed;
            transform: none;        }

        /* --- 진행 상태 --- */
        #progress {
            margin-top: 30px;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 8px;
        }

        .progress-bar {
            width: 100%;
            height: 30px;
            background: #ecf0f1;
            border-radius: 15px;
            overflow: hidden;
            margin-bottom: 15px;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            width: 0%;
            transition: width 0.5s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 500;
        }
        .status-message {
            text-align: center;
            color: #2c3e50;
            font-size: 14px;
        }

        /* --- 모달 스타일 --- */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
        }

        .modal.show {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-content {
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            max-width: 600px;
            width: 90%;            max-height: 80vh;
            overflow-y: auto;
        }

        .modal-content h3 {
            margin-top: 0;
            color: #2c3e50;
            border-bottom: 2px solid #3498db;
            padding-bottom: 10px;
        }

        .guide-step {
            margin: 20px 0;
            padding: 15px;
            background: #f8f9fa;
            border-left: 4px solid #3498db;
            border-radius: 4px;
        }

        .guide-step h4 {
            margin: 0 0 10px 0;
            color: #2c3e50;
        }

        .guide-step pre {
            background: #2c3e50;
            color: #1abc9c;
            padding: 10px;
            border-radius: 4px;
            overflow-x: auto;
        }
        .close-modal {
            float: right;
            font-size: 28px;
            font-weight: bold;
            color: #aaa;
            cursor: pointer;
        }

        .close-modal:hover {
            color: #000;
        }

        /* --- Footer --- */
        .footer-links {
            margin-top: 40px;
            border-top: 1px solid #ecf0f1;
            padding-top: 20px;
        }

        .footer-links a {
            color: #3498db;
            text-decoration: none;
            margin: 0 15px;
            font-size: 14px;
        }

        .footer-links a:hover {
            text-decoration: underline;
        }

        /* --- 로딩 스피너 --- */        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid #f3f3f3;
            border-top: 3px solid #3498db;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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