.tool-container {
  background-color: #ffffff;
  padding: 40px;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  max-width: 600px;
  margin: 40px auto; /* Centering and spacing */
}

.tool-container h2 {
  color: #007bff;
  margin-bottom: 25px;
  font-size: 2em;
}

.input-group {
  margin-bottom: 25px;
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 10px;
  font-weight: bold;
  color: #555;
  font-size: 1.1em;
}

.input-group input[type="date"] {
  width: calc(100% - 22px); /* Adjust for padding and border */
  padding: 12px;
  border: 1px solid #ced4da;
  border-radius: 5px;
  font-size: 1em;
  box-sizing: border-box; /* Include padding in width calculation */
}

.tool-button {
  background-color: #28a745; /* Green color for calculate */
  color: white;
  padding: 12px 25px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1.1em;
  transition: background-color 0.3s ease;
}

.tool-button:hover {
  background-color: #218838; /* Darker green on hover */
}

.tool-result {
  margin-top: 30px;
  font-size: 1.3em;
  color: #333;
  font-weight: bold;
  min-height: 30px; /* To prevent layout shift */
}

.tool-error {
  color: #dc3545; /* Red for errors */
  font-weight: bold;
}

@media (max-width: 768px) {
  .tool-container {
    padding: 25px;
    margin: 20px auto;
  }
  .tool-container h2 {
    font-size: 1.8em;
  }
  .input-group label {
    font-size: 1em;
  }
  .input-group input[type="date"] {
    font-size: 0.9em;
  }
  .tool-button {
    font-size: 1em;
    padding: 10px 20px;
  }
  .tool-result {
    font-size: 1.1em;
  }
}