* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: black;
}

.no-select {
  user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}

.header-container,
.info-container, 
.hint-container,
.footer-container {
  width: 100%;
  max-width: 600px;
  min-width: 300px;
  margin: 0 auto;
  padding: 0 1rem;
}

.footer-dev {
  width: 100%;
  min-width: 300px;
  margin: 0 auto;
  padding: 0 1rem;
}

.title {
  margin-top: 5rem;
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  color: white;
  text-shadow: 0 0 20px lime;
}

.text {
  margin-top: 1rem;
  font-size: 1.2rem;
  text-align: center;
  color: white;
}

.input-container,
.output-container {
  width: 100%;
  max-width: 350px;
  min-width: 300px;
  margin: 2rem auto;
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  border-radius: 5px;
  border: 1px solid black;
  box-shadow: 0 0 10px lime;
  background-color: rgb(255, 255, 255, 0.3);
}

.number {
  width: 100%;
  max-width: 50px;
  margin: 0;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
  outline: none;
  color: white;
  border: 1px solid black;
  border-radius: 5px;
  text-shadow: 0 0 5px black;
  box-shadow: 0 0 5px black;
  background: rgb(255, 255, 255, 0.3)
}

.convert-btn {
  margin: 0;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  color: black;
  border-radius: 5px;
  border: 1px solid black;
  box-shadow: 0 0 5px black;
  background-color: #00ff00;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.convert-btn:hover {
  transform: scale(0.97);
  background-color: rgb(0, 179, 0);
}

.output {
  width: 100%;
  max-width: 350px;
  min-width: 300px;
  margin: 0 auto;
  padding: 1rem 0;
  text-align: center;
  color: white;
  font-size: 1rem;
  text-shadow: 0 0 10px black;
}

.info {
  font-size: 0.9rem;
  margin-top: 2rem;
  text-align: center;
  color: white;
}

.info-icon {
  margin-right: 0.3rem;
  font-size: 0.9rem;
  transform: scale(0.9);
  vertical-align: bottom;
  color: white;
  text-shadow: 0 0 10px lime;
}

.footer-dev {
  font-size: 1rem;
  margin-top: 1rem;
  padding: 1rem;
  text-align: center;
  font-size: 0.9rem;
  color: white;
}