styles.css

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap');

body {
  font-family: 'Montserrat', sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  background-color: #131313;
}

h1 {
  text-align: center;
  color: #fff;
  font-size: 36px;
  font-weight: 400;
}

/* .container {
  background-color: #fff;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
} */

label {
  display: block;
  margin-bottom: 5px;
  font-size: 18px;
  color: #fff;
}

input,
select {
  width: 100%;
  padding: 10px 16px;
  margin-bottom: 15px;
  background-color: #202226;
  border: 1px solid #353A42;
  border-radius: 8px;
  box-sizing: border-box;
  color: #fff;
  font-size: 16px;
  font-family: 'Montserrat', sans-serif;
}

button {
  display: block;
  padding: 18px 32px;
  background-color: #fff;
  color: #131313;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-size: 18px;
  transition: background-color 0.3s ease;
  margin: 64px auto;
}

button:hover {
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.7);
}

#result {
  font-size: 16px;
  margin-top: 20px;
  text-align: center;
  overflow-wrap: break-word;
  width: 100%;
  padding: 10px 16px;
  background-color: #52575F;
  border: 1px solid #353A42;
  border-radius: 8px;
  box-sizing: border-box;
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  display: none;
}

#result.active {
  display: block;
}

.param-container {
  display: none;
}

.param-container.active {
  display: block;
}

@media screen and (max-width: 600px) {
  button {
    width: 100%;
  }
}