* {
  margin: 0;
  padding: 0;

}

body {
  background-color: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1560px;
  min-width: 1240px;
  margin: 20px auto;
  color: #333;
  line-height: 1.6;
}

.container * {
  box-sizing: border-box;
}

header {
  text-align: center;
  padding: 30px 0;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.subtitle {
  font-size: 1rem;
  max-width: 90%;
  margin: 0 auto;
  opacity: 0.9;
}

.tool-description {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.usage-section {
  background: white;
  border-radius: 12px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.usage-section h2, .tool-description h2 {
  color: #2c3e50;
  font-size: 1.4rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f1f2f3;
}

.search-section {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  display: flex;
  gap: 20px;
  align-items: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.search-box {
  flex: 1;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 15px 20px;
  padding-left: 50px;
  font-size: 1.1rem;
  border: 2px solid #e0e0e0;
  border-radius: 50px;
  transition: all 0.3s;
}

.search-box input:focus {
  border-color: #4b6cb7;
  box-shadow: 0 0 0 3px rgba(75, 108, 183, 0.2);
  outline: none;
}

.search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
}

.btn {
  padding: 15px 30px;
  font-size: 1.1rem;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s;
  font-weight: 600;
}

.search-btn {
  background: linear-gradient(135deg, #4b6cb7, #182848);
  color: white;
}

.reset-btn {
  background: #e0e0e0;
  color: #555;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn:active {
  transform: translateY(0);
}

.legend {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
}

.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: bold;
  margin-right: 5px;
}

.tag-unix {
  background: #e74c3c;
  color: white;
}

.tag-registered {
  background: #27ae60;
  color: white;
}

.tag-unregistered {
  background: #f39c12;
  color: white;
}

.table-container {
  background: white;
  border-radius: 12px;
  padding: 20px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  margin-bottom: 40px;
}

.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.table-header h2 {
  color: #2c3e50;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
}

th {
  background: #f8f9fa;
  text-align: left;
  padding: 15px;
  font-weight: 600;
  color: #2c3e50;
  border-bottom: 2px solid #e0e0e0;
}

td {
  padding: 15px;
  border-bottom: 1px solid #eee;
  vertical-align: top;
}

tbody tr:hover {
  background-color: #f8f9ff;
}

.port-cell {
  font-weight: bold;
  color: #3498db;
}

.protocol-cell {
  color: #9b59b6;
  font-weight: 500;
}

.no-results {
  text-align: center;
  padding: 40px;
  color: #7f8c8d;
  font-size: 1.2rem;
}

footer {
  text-align: center;
  padding: 20px;
  color: #7f8c8d;
  font-size: 0.9rem;
}

.stats {
  margin-top: 15px;
  font-size: 0.95rem;
  color: #7f8c8d;
  text-align: right;
}

.highlight {
  background-color: #fffacd;
  font-weight: bold;
  padding: 2px 4px;
  border-radius: 3px;
}