body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f5f5f5;
  color: #333;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 30px;
}

h2 {
  color: #2c3e50;
  margin-top: 30px;
  margin-bottom: 15px;
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

input[type="text"],
input[type="number"],
input[type="password"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

.hosts-section {
  margin-bottom: 20px;
  border: 1px solid #eee;
  padding: 15px;
  border-radius: 4px;
  background-color: #f9f9f9;
}

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

.host-item {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.subnet-label {
  width: 100px;
  margin-bottom: 0;
  margin-right: 10px;
}

.host-input {
  flex: 1;
}

.no-subnets {
  color: #7f8c8d;
  text-align: center;
  font-style: italic;
}

button {
  background-color: #3498db;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
}

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

button:disabled {
  background-color: #bdc3c7;
  cursor: not-allowed;
}

#calculate-btn,
#save-server-btn {
  display: block;
  width: 100%;
  padding: 12px;
  font-size: 18px;
  background-color: #3498db;
  margin-top: 20px;
}

#result {
  margin-top: 30px;
  padding: 15px;
  border-radius: 4px;
  background-color: #f9f9f9;
  min-height: 100px;
}

#result pre {
  white-space: pre-wrap;
  font-family: "Courier New", Courier, monospace;
  margin: 0;
}

.error {
  color: #e74c3c;
  font-weight: bold;
  padding: 10px;
  background-color: #fadbd8;
  border-radius: 4px;
  margin-top: 10px;
}

.success {
  color: #27ae60;
  font-weight: bold;
  padding: 10px;
  background-color: #d5f5e3;
  border-radius: 4px;
  margin-top: 10px;
}

.loading {
  color: #3498db;
  font-weight: bold;
  padding: 10px;
  background-color: #ebf5fb;
  border-radius: 4px;
  margin-top: 10px;
}

.loading-spinner {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

.spinner {
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top: 4px solid #3498db;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
}

.hidden {
  display: none;
}

.server-section {
  margin-top: 30px;
  padding: 20px;
  border: 1px solid #eee;
  border-radius: 4px;
  background-color: #f9f9f9;
}

#enviar-servidor {
  background-color: #27ae60;
  margin-bottom: 15px;
}

#enviar-servidor:hover {
  background-color: #219653;
}

#estado-servidor,
#server-status {
  min-height: 30px;
  margin-top: 15px;
}

/* Estilos para las pestañas */
.tabs {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid #ddd;
}

.tab-btn {
  padding: 10px 20px;
  background-color: transparent;
  color: #333;
  border: none;
  border-bottom: 3px solid transparent;
  margin-right: 10px;
  cursor: pointer;
  font-weight: bold;
}

.tab-btn:hover {
  background-color: #f5f5f5;
}

.tab-btn.active {
  border-bottom: 3px solid #3498db;
  color: #3498db;
}

.tab-content {
  display: none;
}

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

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