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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        /* Login Page */
        .login-container {
            max-width: 400px;
            margin: 100px auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            padding: 40px;
            display: none;
        }

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

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

        .login-header h1 {
            color: #1e3c72;
            font-size: 2em;
            margin-bottom: 10px;
        }

        .login-header p {
            color: #6c757d;
        }

        .login-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            margin-bottom: 8px;
            color: #495057;
            font-weight: 500;
        }

        .form-group input {
            padding: 12px 15px;
            font-size: 1em;
            border: 2px solid #dee2e6;
            border-radius: 8px;
            transition: all 0.3s;
        }

        .form-group input:focus {
            outline: none;
            border-color: #1e3c72;
            box-shadow: 0 0 0 3px rgba(30, 60, 114, 0.1);
        }

        .login-button {
            padding: 15px;
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1.1em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .login-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(30, 60, 114, 0.3);
        }

        .login-button:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .login-error {
            display: none;
            padding: 12px;
            background: #f8d7da;
            color: #721c24;
            border-radius: 8px;
            border: 1px solid #f5c6cb;
        }

        .login-error.active {
            display: block;
        }

        /* Main App */
        .app-container {
            max-width: 1400px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            overflow: hidden;
            display: none;
        }

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

        /* Header */
        .header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header-left h1 {
            font-size: 2.5em;
            margin-bottom: 5px;
            font-weight: 700;
        }

        .header-left p {
            opacity: 0.9;
            font-size: 1.1em;
        }

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

        .user-info {
            text-align: right;
            margin-right: 15px;
        }

        .user-name {
            font-weight: 600;
            font-size: 1.1em;
        }

        .user-email {
            opacity: 0.8;
            font-size: 0.9em;
        }

        .logout-button {
            padding: 10px 20px;
            background: rgba(255,255,255,0.2);
            color: white;
            border: 2px solid white;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .logout-button:hover {
            background: white;
            color: #1e3c72;
        }

        /* Stats Bar */
        .stats-bar {
            display: flex;
            justify-content: space-around;
            padding: 20px;
            background: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
            flex-wrap: wrap;
            gap: 10px;
        }

        .stat-item {
            text-align: center;
            min-width: 120px;
        }

        .stat-value {
            font-size: 2em;
            font-weight: bold;
            color: #1e3c72;
        }

        .stat-label {
            color: #6c757d;
            font-size: 0.9em;
            margin-top: 5px;
        }

        /* Search Section */
        .search-section {
            padding: 30px;
            background: white;
        }

        .search-box {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }

        .search-input {
            flex: 1;
            padding: 15px 20px;
            font-size: 1.1em;
            border: 2px solid #dee2e6;
            border-radius: 10px;
            transition: all 0.3s;
            text-transform: uppercase;
        }

        .search-input:focus {
            outline: none;
            border-color: #1e3c72;
            box-shadow: 0 0 0 3px rgba(30, 60, 114, 0.1);
        }

        .search-button, .filter-toggle {
            padding: 15px 30px;
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 1em;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .search-button:hover, .filter-toggle:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(30, 60, 114, 0.3);
        }

        /* Filters */
        .filters {
            display: none;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 10px;
            margin-bottom: 20px;
        }

        .filters.active {
            display: grid;
        }

        .filter-group label {
            display: block;
            margin-bottom: 5px;
            color: #495057;
            font-weight: 500;
        }

        .filter-group input, .filter-group select {
            width: 100%;
            padding: 10px;
            border: 2px solid #dee2e6;
            border-radius: 5px;
        }

        /* Results */
        .results-section {
            padding: 0 30px 30px;
        }

        .results-header {
            font-size: 1.2em;
            color: #495057;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .loading {
            text-align: center;
            padding: 40px;
            color: #6c757d;
            font-size: 1.2em;
        }

        .error {
            padding: 20px;
            background: #f8d7da;
            color: #721c24;
            border-radius: 10px;
            border: 1px solid #f5c6cb;
        }

        /* Aircraft Cards */
        .aircraft-card {
            background: #fff;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 20px;
            transition: all 0.3s;
        }

        .aircraft-card:hover {
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transform: translateY(-2px);
        }

        .aircraft-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 2px solid #e9ecef;
        }

        .aircraft-title {
            font-size: 1.5em;
            font-weight: bold;
            color: #1e3c72;
        }

        .aircraft-type {
            color: #6c757d;
            font-size: 1.1em;
        }

        .drill-down-button {
            padding: 8px 16px;
            background: #28a745;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }

        .drill-down-button:hover {
            background: #218838;
            transform: scale(1.05);
        }

        .aircraft-info {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 10px;
            margin-bottom: 15px;
        }

        .info-item {
            padding: 8px;
            background: #f8f9fa;
            border-radius: 5px;
        }

        .info-label {
            color: #6c757d;
            font-size: 0.85em;
            margin-bottom: 3px;
        }

        .info-value {
            font-weight: 600;
            color: #495057;
        }

        /* Media Grid */
        .media-section {
            margin-top: 20px;
        }

        .media-header {
            font-weight: 600;
            margin-bottom: 10px;
            color: #495057;
        }

        .media-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 10px;
        }

        .media-item {
            position: relative;
            aspect-ratio: 4/3;
            background: #dee2e6;
            border-radius: 10px;
            overflow: hidden;
            cursor: pointer;
            transition: all 0.3s;
        }

        .aircraft-inline-info {
            font-size: 0.6em;
            font-weight: 400;
            color: #6c757d;
            margin-left: 10px;
            vertical-align: middle;
        }        

        .media-item:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }

        .media-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .media-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(0,0,0,0.7);
            color: white;
            padding: 5px 10px;
            border-radius: 5px;
            font-size: 0.8em;
            font-weight: 600;
        }

        .media-info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            color: white;
            padding: 10px;
            font-size: 0.85em;
        }

        .media-loading {
            display: flex;
            align-items: center;
            justify-content: center;
            color: #6c757d;
        }

        /* Lightbox */
        .lightbox {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.95);
            z-index: 9999;
            justify-content: center;
            align-items: center;
        }

        .lightbox.active {
            display: flex;
        }

        .lightbox-content {
            max-width: 90%;
            max-height: 90%;
            position: relative;
        }

        .lightbox-image {
            max-width: 100%;
            max-height: 90vh;
            object-fit: contain;
        }

        .lightbox-close {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 3em;
            color: white;
            cursor: pointer;
            background: rgba(0,0,0,0.5);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }

        .lightbox-close:hover {
            background: rgba(0,0,0,0.8);
            transform: scale(1.1);
        }

        .lightbox-info {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: transparent;
            color: white;
            padding: 12px 20px;
            border-radius: 10px;
            text-align: left;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .lightbox-tag {
            display: inline-block;
            background: rgba(0,0,0,0.8);
            color: white;
            padding: 8px 15px;
            border-radius: 8px;
            margin-right: 8px;
            font-size: 1em;
        }

        /* Aircraft Detail Tags */
        .aircraft-tag {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.75em;
            font-weight: 500;
            margin-left: 6px;
            vertical-align: middle;
            font-family: Monaco, Consolas, 'Courier New', monospace;
        }

        .tag-typecode {
            background: #e3e8f0;
            color: #3d5a80;
        }

        .tag-type {
            background: #dff0e3;
            color: #2d6a4f;
        }

        .tag-airline {
            background: #fde8d8;
            color: #9c4221;
        }

        .tag-cn {
            background: #e8e0f0;
            color: #5b4a8a;
        }

        @media (max-width: 768px) {
            .header {
                flex-direction: column;
                text-align: center;
            }

            .header-right {
                margin-top: 20px;
                flex-direction: column;
            }

            .search-box {
                flex-direction: column;
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }
        }