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

        body {
          font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
          background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
          min-height: 100vh;
          padding: 20px;
        }

        .btn-clear-history {
          background: linear-gradient(135deg, #dc3545, #c82333);
          color: white;
          border: none;
          border-radius: 8px;
          padding: 8px 16px;
          font-size: 0.9rem;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          margin-top: 10px;
        }

        .btn-clear-history:hover {
          transform: translateY(-2px);
          box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
        }

        .history-header {
          text-align: center;
          margin-bottom: 25px;
        }

        /* Estilos do Histórico */
        .history-section {
          margin-top: 40px;
          padding: 30px;
          background: #f8f9fa;
          border-top: 2px solid #dee2e6;
        }

        .history-header {
          text-align: center;
          margin-bottom: 25px;
        }

        .history-header h3 {
          color: #2c3e50;
          font-size: 1.5rem;
          margin-bottom: 8px;
        }

        .history-header p {
          color: #666;
          font-size: 0.95rem;
          margin-bottom: 15px;
        }

        .btn-clear-history {
          background: linear-gradient(135deg, #dc3545, #c82333);
          color: white;
          border: none;
          border-radius: 8px;
          padding: 8px 16px;
          font-size: 0.9rem;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          margin-top: 10px;
        }

        .btn-clear-history:hover {
          transform: translateY(-2px);
          box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
        }

        .history-empty {
          text-align: center;
          padding: 40px 20px;
          color: #666;
          background: white;
          border-radius: 12px;
          border: 2px dashed #dee2e6;
        }

        .history-empty p {
          margin: 8px 0;
        }

        .history-table-container {
          overflow-x: auto;
          background: white;
          border-radius: 12px;
          box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .history-table {
          width: 100%;
          border-collapse: collapse;
          font-size: 0.9rem;
          min-width: 600px;
        }

        .history-table th {
          background: #2c3e50;
          color: white;
          padding: 12px 8px;
          text-align: left;
          font-weight: 600;
          border-bottom: 2px solid #34495e;
        }

        .history-table th.test-column {
          text-align: center;
          min-width: 100px;
          background: #3498db;
        }

        .history-table th small {
          display: block;
          font-size: 0.75rem;
          margin-top: 4px;
          opacity: 0.9;
        }

        .history-table td {
          padding: 10px 8px;
          border-bottom: 1px solid #dee2e6;
          vertical-align: middle;
        }

        .history-table tr:hover {
          background: #f8f9fa;
        }

        .provider-name {
          font-weight: 600;
          color: #2c3e50;
          min-width: 120px;
        }

        .provider-ip {
          font-family: 'Courier New', monospace;
          color: #666;
          font-size: 0.85rem;
          min-width: 140px;
        }

        .provider-protocol {
          min-width: 80px;
        }

        .latency-cell {
          text-align: center;
          font-family: 'Courier New', monospace;
          font-weight: 600;
          color: #27ae60;
          min-width: 100px;
        }

        .latency-cell.empty {
          color: #999;
          font-style: italic;
        }

        @media (max-width: 768px) {
          .history-section {
            padding: 20px 15px;
          }

          .history-table {
            font-size: 0.8rem;
            min-width: 500px;
          }

          .history-table th,
          .history-table td {
            padding: 8px 6px;
          }

          .history-header h3 {
            font-size: 1.2rem;
          }
        }

        /* Substitua os estilos anteriores da coluna de média por estes */
        .history-table th.average-column {
          text-align: center;
          min-width: 80px;
          background: #28a745;
          color: white;
        }

        .history-table .average-cell {
          text-align: center;
          font-family: 'Courier New', monospace;
          font-weight: 700;
          color: #155724;
          background: #d4edda;
          min-width: 80px;
          border-left: 2px solid #28a745;
        }

        .history-table .average-cell.empty {
          color: #999;
          font-style: italic;
          background: #f8f9fa;
          border-left: 2px solid #dee2e6;
        }

        .history-header h3 {
          color: #2c3e50;
          font-size: 1.5rem;
          margin-bottom: 8px;
        }

        .history-header p {
          color: #666;
          font-size: 0.95rem;
          margin-bottom: 15px;
        }

        .alert {
          background: #fffbe5;
          border-left: 5px solid #ffd700;
          padding: 14px 18px;
          border-radius: 5px;
          margin-bottom: 22px;
          font-size: 1em;
          color: #333;
        }

        .alert b {
          font-weight: 600;
        }

        .alert ul {
          margin: 7px 0 0 25px;
          padding: 0;
          font-size: 0.98em;
        }

        .container {
          max-width: 1200px;
          margin: 0 auto;
          background: rgba(255, 255, 255, 0.95);
          border-radius: 20px;
          box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
          overflow: hidden;
        }

        .header {
          background: linear-gradient(135deg, #2c3e50, #3498db);
          color: white;
          padding: 30px;
          text-align: center;
        }

        .header h1 {
          font-size: 2.5rem;
          margin-bottom: 10px;
          text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

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

        .custom-dns {
          padding: 25px 30px;
          background: #e8f4fd;
          border-bottom: 1px solid #d1ecf1;
        }

        .custom-dns h3 {
          color: #2c3e50;
          margin-bottom: 15px;
          display: flex;
          align-items: center;
          gap: 10px;
        }

        .dns-input-group {
          display: flex;
          gap: 15px;
          align-items: center;
          flex-wrap: wrap;
        }

        .dns-input {
          flex: 1;
          min-width: 200px;
          padding: 12px 15px;
          border: 2px solid #d1ecf1;
          border-radius: 8px;
          font-size: 1rem;
          transition: all 0.3s ease;
          font-family: 'Courier New', monospace;
        }

        .dns-input:focus {
          outline: none;
          border-color: #3498db;
          box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
        }

        .dns-input.ipv4 {
          border-left: 4px solid #3498db;
        }

        .dns-input.ipv6 {
          border-left: 4px solid #e74c3c;
        }

        .dns-input.invalid {
          border-left: 4px solid #f39c12;
        }

        .dns-input::placeholder {
          color: #6c757d;
        }

        .provider-input {
          flex: 0 0 150px;
          padding: 12px 15px;
          border: 2px solid #d1ecf1;
          border-radius: 8px;
          font-size: 1rem;
          transition: all 0.3s ease;
        }

        .provider-input:focus {
          outline: none;
          border-color: #3498db;
          box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
        }

        .btn-add {
          padding: 12px 20px;
          background: linear-gradient(135deg, #28a745, #20c997);
          color: white;
          border: none;
          border-radius: 8px;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          white-space: nowrap;
        }

        .btn-add:hover {
          transform: translateY(-2px);
          box-shadow: 0 6px 12px rgba(40, 167, 69, 0.3);
        }

        .ip-type-indicator {
          padding: 4px 8px;
          border-radius: 12px;
          font-size: 0.8rem;
          font-weight: 600;
          text-transform: uppercase;
          margin-left: 10px;
        }

        .ip-type-indicator.ipv4 {
          background: #d4edda;
          color: #155724;
        }

        .ip-type-indicator.ipv6 {
          background: #f8d7da;
          color: #721c24;
        }

        .custom-dns-list {
          margin-top: 15px;
          display: flex;
          flex-wrap: wrap;
          gap: 10px;
        }

        .custom-dns-tag {
          background: white;
          padding: 8px 12px;
          border-radius: 20px;
          font-size: 0.9rem;
          border: 2px solid #3498db;
          color: #2c3e50;
          display: flex;
          align-items: center;
          gap: 8px;
        }

        .custom-dns-tag.ipv6 {
          border-color: #27ae60;
        }

        .protocol-badge {
          background: #3498db;
          color: white;
          padding: 2px 6px;
          border-radius: 10px;
          font-size: 0.7rem;
          font-weight: 600;
        }

        .protocol-badge.ipv6 {
          background: #2c3e50;
        }

        .remove-dns {
          background: #e74c3c;
          color: white;
          border: none;
          border-radius: 50%;
          width: 20px;
          height: 20px;
          font-size: 12px;
          cursor: pointer;
          display: flex;
          align-items: center;
          justify-content: center;
        }

        .remove-dns:hover {
          background: #c0392b;
        }

        .controls {
          padding: 30px;
          background: #f8f9fa;
          border-bottom: 1px solid #e9ecef;
        }

        .tabs-container {
          margin-bottom: 25px;
        }

        .tabs {
          display: flex;
          justify-content: center;
          gap: 5px;
          background: #e9ecef;
          border-radius: 12px;
          padding: 5px;
          margin-bottom: 20px;
        }

        .tab {
          flex: 1;
          max-width: 200px;
          padding: 12px 20px;
          background: transparent;
          border: none;
          border-radius: 8px;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          color: #6c757d;
          display: flex;
          align-items: center;
          justify-content: center;
          gap: 8px;
        }

        .tab.active {
          background: white;
          color: #2c3e50;
          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .tab:hover:not(.active) {
          background: rgba(255, 255, 255, 0.7);
          color: #495057;
        }

        .tab.disabled {
          background: #e9ecef !important;
          color: #6c757d !important;
          cursor: not-allowed !important;
          opacity: 0.6 !important;
        }

        .tab.disabled:hover {
          background: #e9ecef !important;
          color: #6c757d !important;
          transform: none !important;
          cursor: not-allowed !important;
        }

        .tab-content {
          display: none;
        }

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

        .button-group {
          display: flex;
          gap: 15px;
          justify-content: center;
          flex-wrap: wrap;
        }

        .btn {
          padding: 15px 30px;
          border: none;
          border-radius: 12px;
          font-size: 1rem;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          text-transform: uppercase;
          letter-spacing: 1px;
        }

        .btn-primary {
          background: linear-gradient(135deg, #4CAF50, #45a049);
          color: white;
        }

        .btn-primary:hover {
          transform: translateY(-2px);
          box-shadow: 0 8px 16px rgba(76, 175, 80, 0.3);
        }

        .btn-secondary {
          background: linear-gradient(135deg, #ff6b6b, #ee5253);
          color: white;
        }

        .btn-secondary:hover {
          transform: translateY(-2px);
          box-shadow: 0 8px 16px rgba(255, 107, 107, 0.3);
        }

        .btn-info {
          background: linear-gradient(135deg, #74b9ff, #0984e3);
          color: white;
        }

        .btn-custom {
          background: linear-gradient(135deg, #9c27b0, #8e24aa);
          color: white;
        }

        .btn-custom:hover {
          transform: translateY(-2px);
          box-shadow: 0 8px 16px rgba(156, 39, 176, 0.3);
        }

        .btn:disabled {
          opacity: 0.6;
          cursor: not-allowed;
          transform: none;
        }

        .progress-container {
          padding: 20px 30px;
          background: #f8f9fa;
          display: none;
        }

        .progress-bar {
          width: 100%;
          height: 25px;
          background: #e9ecef;
          border-radius: 12px;
          overflow: hidden;
          box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .progress-fill {
          height: 100%;
          background: linear-gradient(90deg, #4CAF50, #8BC34A);
          width: 0%;
          transition: width 0.3s ease;
          border-radius: 12px;
        }

        .progress-text {
          text-align: center;
          margin-top: 10px;
          font-weight: 600;
          color: #2c3e50;
        }

        .results {
          padding: 30px;
        }

        .dns-grid {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
          gap: 20px;
        }

        .dns-card {
          background: white;
          border-radius: 15px;
          padding: 20px;
          box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
          border-left: 5px solid #ddd;
          transition: all 0.3s ease;
        }

        .dns-card:hover {
          transform: translateY(-5px);
          box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
        }

        .dns-card.pending {
          border-left-color: #ff9800 !important;
        }

        .dns-card.success {
          border-left-color: #4CAF50;
        }

        .dns-card.success.ipv6 {
          border-left-color: #1e7e34;
        }

        .dns-card.error {
          border-left-color: #f44336 !important;
        }

        .dns-card.custom {
          border-left-color: #9c27b0;
        }

        .dns-card.ipv6 {
          border-left-color: #1e7e34;
        }

        .dns-header {
          display: flex;
          justify-content: space-between;
          align-items: center;
          margin-bottom: 15px;
        }

        .dns-provider {
          font-size: 1.2rem;
          font-weight: 700;
          color: #2c3e50;
          display: flex;
          align-items: center;
          gap: 8px;
        }

        .custom-badge {
          background: #9c27b0;
          color: white;
          padding: 2px 8px;
          border-radius: 12px;
          font-size: 0.7rem;
        }

        .dns-status {
          padding: 5px 12px;
          border-radius: 20px;
          font-size: 0.85rem;
          font-weight: 600;
          text-transform: uppercase;
        }

        .status-success {
          background: #d4edda;
          color: #155724;
        }

        .status-error {
          background: #f8d7da;
          color: #721c24;
        }

        .status-pending {
          background: #fff3cd;
          color: #856404;
        }

        .dns-ip {
          font-family: 'Courier New', monospace;
          font-size: 1.1rem;
          color: #666;
          margin-bottom: 10px;
          word-break: break-all;
        }

        .dns-ping {
          font-size: 1rem;
          color: #333;
        }

        .attempt-badge {
          display: inline-block;
          background: #17a2b8;
          color: white;
          padding: 2px 8px;
          border-radius: 10px;
          font-size: 0.75rem;
          font-weight: 600;
          margin-left: 8px;
        }

        .attempt-badge.first-try {
          background: #28a745;
        }

        .attempt-badge.second-try {
          background: #ffc107;
          color: #212529;
        }

        .attempt-badge.third-try {
          background: #fd7e14;
        }

        .stats {
          margin-top: 30px;
          padding: 25px;
          background: linear-gradient(135deg, #f8f9fa, #e9ecef);
          border-radius: 15px;
          display: none;
        }

        .stats-grid {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
          gap: 20px;
          text-align: center;
        }

        .stat-item {
          background: white;
          padding: 20px;
          border-radius: 12px;
          box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .stat-number {
          font-size: 2rem;
          font-weight: 700;
          margin-bottom: 5px;
        }

        .stat-label {
          color: #666;
          font-size: 0.9rem;
          text-transform: uppercase;
          letter-spacing: 1px;
        }

        .spinner {
          border: 3px solid #f3f3f3;
          border-top: 3px solid #3498db;
          border-radius: 50%;
          width: 20px;
          height: 20px;
          animation: spin 1s linear infinite;
          display: inline-block;
          margin-right: 10px;
        }

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

        .loading {
          opacity: 0.7;
        }

        .top3-details-card {
          margin-top: 20px;
          background: white;
          border-radius: 15px;
          padding: 25px;
          box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
          border-left: 5px solid #ffd700;
        }

        .top3-title {
          color: #2c3e50;
          margin-bottom: 25px;
          text-align: center;
          font-size: 1.3rem;
        }

        .rankings-container {
          display: grid;
          gap: 25px;
        }

        .rankings-container.dual-column {
          grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        }

        .rankings-container.single-column {
          grid-template-columns: 1fr;
          max-width: 600px;
          margin: 0 auto;
        }

        .ranking-section {
          background: #f8f9fa;
          border-radius: 12px;
          padding: 20px;
          border-left: 4px solid;
        }

        .ranking-section.ipv4 {
          border-left-color: #4CAF50;
        }

        .ranking-section.ipv6 {
          border-left-color: #1e7e34;
        }

        .ranking-title {
          margin-bottom: 15px;
          font-size: 1.1rem;
          font-weight: 700;
          text-align: center;
          padding: 8px 16px;
          border-radius: 20px;
          color: white;
        }

        .ranking-title.ipv4 {
          background: linear-gradient(135deg, #4CAF50, #45a049);
        }

        .ranking-title.ipv6 {
          background: linear-gradient(135deg, #1e7e34, #155724);
        }

        .ranking-list {
          display: flex;
          flex-direction: column;
          gap: 12px;
        }

        .ranking-item {
          background: white;
          border-radius: 10px;
          padding: 15px;
          border-left: 3px solid;
          box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .ranking-item.ipv4 {
          border-left-color: #3498db;
        }

        .ranking-item.ipv6 {
          border-left-color: #27ae60;
        }

        .ranking-item:nth-child(1) {
          border-left-width: 4px;
          transform: scale(1.02);
        }

        .ranking-header {
          display: flex;
          align-items: center;
          gap: 15px;
          margin-bottom: 10px;
        }

        .medal {
          font-size: 1.3rem;
        }

        .dns-name {
          flex: 1;
          display: flex;
          align-items: center;
          gap: 8px;
          font-size: 1rem;
        }

        .ping-time {
          font-size: 1.1rem;
          font-weight: 700;
          color: #27ae60;
          background: #d4edda;
          padding: 4px 10px;
          border-radius: 15px;
        }

        .ranking-details {
          display: grid;
          grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
          gap: 6px;
        }

        .detail-item {
          display: flex;
          align-items: center;
          gap: 8px;
          padding: 3px 0;
        }

        .detail-label {
          font-weight: 600;
          color: #666;
          min-width: 75px;
          font-size: 0.85rem;
        }

        .detail-value {
          font-family: 'Courier New', monospace;
          background: #f8f9fa;
          padding: 2px 6px;
          border-radius: 4px;
          border: 1px solid #dee2e6;
          font-size: 0.8rem;
          word-break: break-all;
          flex: 1;
        }

        .no-results {
          text-align: center;
          padding: 20px;
          color: #666;
          font-style: italic;
        }

        .cache-info {
          background: linear-gradient(135deg, #e3f2fd, #bbdefb);
          border: 2px solid #2196f3;
          border-radius: 12px;
          padding: 15px;
          margin-bottom: 20px;
          box-shadow: 0 4px 8px rgba(33, 150, 243, 0.2);
        }

        .cache-content {
          display: flex;
          align-items: center;
          gap: 12px;
          flex-wrap: wrap;
        }

        .cache-icon {
          font-size: 1.2rem;
        }

        .cache-text {
          flex: 1;
          color: #1565c0;
          font-weight: 500;
          min-width: 200px;
        }

        .cache-refresh {
          background: linear-gradient(135deg, #4caf50, #45a049);
          color: white;
          border: none;
          border-radius: 8px;
          padding: 8px 16px;
          font-size: 0.9rem;
          font-weight: 600;
          cursor: pointer;
          transition: all 0.3s ease;
          white-space: nowrap;
        }

        .cache-refresh:hover {
          transform: translateY(-2px);
          box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
        }

        /* Novo estilo para a informação do IP */
        .ip-info {
          background: linear-gradient(135deg, #ffeaa7, #fdcb6e);
          border: 2px solid #e17055;
          border-radius: 10px;
          padding: 12px 20px;
          margin: 15px 30px;
          display: flex;
          align-items: center;
          justify-content: center;
          gap: 10px;
          font-weight: 600;
          color: #2d3436;
          box-shadow: 0 4px 8px rgba(225, 112, 85, 0.2);
        }

        .ip-info .icon {
          font-size: 1.2rem;
        }

        .ip-info .ip-address {
          font-family: 'Courier New', monospace;
          background: rgba(255, 255, 255, 0.7);
          padding: 4px 8px;
          border-radius: 6px;
          border: 1px solid rgba(0, 0, 0, 0.1);
        }

        .ip-info.loading {
          background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
          color: #666;
        }

        .ip-info.error {
          background: linear-gradient(135deg, #ffcccb, #ffb3b3);
          border-color: #d63031;
          color: #2d3436;
        }

        @media (max-width: 768px) {
          .ip-info {
            margin: 15px 15px;
            padding: 10px 15px;
            flex-direction: column;
            gap: 8px;
            text-align: center;
          }
        }

        @media (max-width: 768px) {
          .header h1 {
            font-size: 2rem;
          }

          .button-group {
            flex-direction: column;
            align-items: center;
          }

          .btn {
            width: 100%;
            max-width: 300px;
          }

          .dns-input-group {
            flex-direction: column;
          }

          .dns-input, .provider-input {
            width: 100%;
          }

          .rankings-container.dual-column {
            grid-template-columns: 1fr;
            gap: 20px;
          }

          .ranking-header {
            flex-direction: column;
            align-items: start;
            gap: 8px;
          }

          .ranking-details {
            grid-template-columns: 1fr;
          }

          .custom-banner {
            background: #fffbe6;
            color: #664d03;
            border: 1px solid #ffe58f;
            border-radius: 6px;
            padding: 12px;
            margin-bottom: 16px;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 8px;
          }
        }