:root {
            --primary: #3a7bd5;
            --primary-light: #6fa1ff;
            --primary-dark: #2860b1;
            --background: #f9fafb;
            --card-bg: #ffffff;
            --text: #2d3748;
            --text-light: #718096;
            --text-secondary: #64748b;
            --success: #38b2ac;
            --error: #e53e3e;
            --border: #e2e8f0;
            --table-header-bg: #f5f7fa;
            --table-hover: #f7fafc;
            --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --input-bg: #ffffff;
        }

        .dark-theme {
            --primary: #4f8ef7;
            --primary-light: #70a5ff;
            --primary-dark: #3b6fc7;
            --background: #171923;
            --card-bg: #1a202c;
            --text: #e2e8f0;
            --text-light: #a0aec0;
            --text-secondary: #a0aec0;
            --success: #38a169;
            --error: #e53e3e;
            --border: #2d3748;
            --table-header-bg: #2d3748;
            --table-hover: #2d3748;
            --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
            --input-bg: #2d3748;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            transition: background-color 0.3s, color 0.3s, border-color 0.3s;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
            background-color: var(--background);
            color: var(--text);
            line-height: 1.6;
            padding: 30px 20px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            max-width: 1100px;
            margin-bottom: 40px;
        }

        .theme-toggle {
            display: flex;
            align-items: center;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 5px 15px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
        }

        .theme-toggle svg {
            margin-right: 8px;
        }

        h1 {
            color: var(--text);
            font-weight: 800;
            font-size: 28px;
            text-align: center;
            letter-spacing: -0.5px;
        }

        .container {
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
        }

        .search-card {
            background: var(--card-bg);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            padding: 30px;
            margin-bottom: 40px;
            width: 100%;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: var(--text);
            font-size: 15px;
        }

        .input-wrapper {
            position: relative;
            margin-bottom: 25px;
        }

        .filter-input {
            width: 100%;
            padding: 12px 35px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 16px;
            color: var(--text);
            background-color: var(--input-bg);
            transition: border-color 0.2s ease;
        }
        
        .ip-input {
            width: 100%;
            padding: 12px 12px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 16px;
            color: var(--text);
            background-color: var(--input-bg);
            transition: border-color 0.2s ease;
        }

        input[type="text"]:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(58, 123, 213, 0.15);
        }

        input[type="text"]::placeholder {
            color: var(--text-light);
        }

        .search-button {
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 12px 0;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            transition: background-color 0.2s, transform 0.1s;
        }

        .search-button:hover {
            background-color: var(--primary-dark);
        }

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

        #result {
            width: 100%;
            margin-top: 20px;
        }

        .results-container {
            background: var(--card-bg);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            overflow: hidden;
            margin-bottom: 30px;
        }

        .search-result-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 25px;
            border-bottom: 1px solid var(--border);
        }

        .search-result-title {
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
        }

        .search-result-count {
            color: var(--text-light);
            font-size: 14px;
        }

        .search-wrapper {
            position: relative;
            margin: 20px 25px;
        }

        .search-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
            pointer-events: none;
        }

        table {
            width: 100%;
            border-collapse: collapse;
        }

        th {
            background-color: var(--table-header-bg);
            padding: 15px 20px;
            text-align: left;
            font-weight: 600;
            color: var(--text);
            font-size: 14px;
            cursor: pointer;
            position: relative;
            border-bottom: 1px solid var(--border);
            user-select: none;
        }

        th:hover {
            background-color: var(--table-hover);
        }

        th::after {
            content: "";
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 12px;
            height: 12px;
            opacity: 0.3;
            background-size: contain;
            background-repeat: no-repeat;
            background-position: center;
            transition: opacity 0.2s;
        }

        .light-theme th::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='16' height='16'%3E%3Cpath fill='none' d='M0 0h24v24H0z'/%3E%3Cpath d='M12 8l6 6H6z' fill='%232d3748'/%3E%3C/svg%3E");
        }

        .dark-theme th::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='16' height='16'%3E%3Cpath fill='none' d='M0 0h24v24H0z'/%3E%3Cpath d='M12 8l6 6H6z' fill='%23e2e8f0'/%3E%3C/svg%3E");
        }

        th:hover::after {
            opacity: 0.6;
        }

        th[data-sort="asc"]::after {
            transform: translateY(-50%) rotate(180deg);
            opacity: 1;
        }

        th[data-sort="desc"]::after {
            opacity: 1;
        }

        td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            font-size: 15px;
        }

        tr:last-child td {
            border-bottom: none;
        }

        tr:hover td {
            background-color: var(--table-hover);
        }

        .status {
            display: flex;
            align-items: center;
            font-weight: 500;
        }

        .status::before {
            content: "";
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .status-up {
            color: var(--success);
        }

        .status-down {
            color: var(--error);
        }
        
        .status-up::before {
            background-color: var(--success);
        }
        
        .status-down::before {
            background-color: var(--error);
        }
        
        .highlighted-column {
            background-color: rgba(58, 123, 213, 0.05);
        }

        .error-container {
            text-align: center;
            padding: 60px 30px;
            background: var(--card-bg);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
        }

        .error-icon {
            color: var(--error);
            margin-bottom: 15px;
        }

        .error-message {
            color: var(--error);
            font-weight: 600;
            margin-bottom: 10px;
        }

        .error-details {
            color: var(--text-light);
            font-size: 14px;
        }

        .loading-container {
            text-align: center;
            padding: 60px 30px;
        }

        .loader {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin: 0 auto 20px;
            border: 3px solid var(--border);
            border-top-color: var(--primary);
            animation: spin 1s linear infinite;
        }

        .loading-text {
            color: var(--text-light);
        }

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

        @media (max-width: 768px) {
            .header {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }
            
            .container {
                padding: 0;
            }
            
            .search-card {
                padding: 25px 20px;
                border-radius: 10px;
            }

            h1 {
                font-size: 24px;
                text-align: left;
            }
            
            table {
                display: block;
                overflow-x: auto;
            }
            
            th, td {
                padding: 12px 15px;
            }

            .results-container {
                border-radius: 10px;
            }
        }