:root {
  --main: #e54;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Helvetica, Arial, sans-serif;
  color: #222;
}

body {
  background-color: #f3f4fd;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
  min-height: 800px;
  padding: 20px 0;
}

.container h1 {
  text-align: center;
  font-size: 1.4rem;
  margin-bottom: 10px;
  color: var(--main);
  max-width: 250px;
  line-height: 1.4;
}

.container main {
  padding: 20px;
  width: 250px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  justify-content: start;
  border: 4px solid #e54;
  border-radius: 4px;
}

.container main img {
  width: 80%;
  margin-bottom: 20px;
}

.container main > label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  color: var(--main);
  margin-top: 20px;
}

.container main input {
  display: block;
}

.container main input[type="number"] {
  width: 80%;
  padding: 10px;
  background-color: #f3f4fd;
  color: #222;
  border: 2px solid #e54;
  border-radius: 4px;
}

.container main input[type="number"]:focus {
  border-radius: 2px solid var(--main);
  color: 222;
  outline: none;
}

.container main #radios {
  display: flex;
  align-items: center;
}

.container main #radios label {
  display: inline-block;
}

.container main #lido-concentration-label,
.container main #lidoMlLabel {
  text-align: center;
  line-height: 1.4;
}

.container main #radios label:nth-child(2) input,
.container main #radios label:nth-child(3) input {
  margin-left: 6px;
}

.container main #radios input {
  display: inline-block;
  margin-right: 4px;
}

.container main button {
  width: 80%;
  padding: 10px;
  border: 2px solid #e54;
  text-align: center;
  text-decoration: none;
  font-size: 1em;
  margin-top: 20px;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  background-color: #e54;
  outline: none;
  transition: 0.3s;
}

.container main #calculate:hover {
  filter: brightness(0.9);
}

.container main #lidoMlLabel {
  display: none;
}

.container main #lidoMlResult {
  display: none;
  cursor: auto;
  width: 80%;
  padding: 10px;
  border: 2px solid #e54;
  text-align: center;
  text-decoration: none;
  font-size: 1em;
  border-radius: 4px;
  color: #fff;
  background-color: #e54;
  outline: none;
}