body {
  font-family: Arial, sans-serif;
  padding: 20px;
}

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

#header h1 {
  font-size: 32px;
  font-weight: bold;
}

#header p {
  font-size: 18px;
}

.columns {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.column {
  flex: 1;
  margin: 10px;
  padding: 10px;
  border: 1px solid #ddd;
  box-shadow: 2px 2px 12px rgba(0, 0, 0, 0.1);
  min-width: 240px;
  max-width: 320px;
}

.column h2 {
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
}

.domain {
  margin-bottom: 20px;
}

.region {
  font-size: 24px;
  font-weight: bold;
  color: #333;
}

.location {
  font-size: 18px;
  color: #666;
}

.response-time {
  font-size: 18px;
  color: #333;
}

.response-time-value {
  font-size: 18px;
}

.response-time.green .response-time-value {
  color: green;
}

.response-time.orange .response-time-value {
  color: orange;
}

.response-time.red .response-time-value {
  color: red;
}

.custom-box {
  margin: 20px 0;
  padding: 20px;
  border: 1px solid #ddd;
  box-shadow: 2px 2px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.custom-box input {
  padding: 10px;
  font-size: 16px;
  width: 80%;
  margin-right: 10px;
  margin-bottom: 30px;
  box-sizing: border-box;
}

.custom-box button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #007bff;
  color: #fff;
  border: none;
  cursor: pointer;
}

.custom-box button:hover {
  background-color: #0056b3;
}

@media (max-width: 900px) {
  .columns {
    flex-direction: column;
  }
  .column {
    max-width: 100%;
  }
}