* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: black;
  background-color: rgb(255, 255, 255);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

main {
  padding: 1rem;
}

#interface {
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  border-radius: 0 0 15px 15px;
  min-width: 500px;
}

h1 {
  font-weight: bold;
  font-size: 1.5rem;
  text-align: center;
  width: 100%;
  margin: 0;
  padding: 10px;
  background-color: #37495c;
  color: #fff;
  border-radius: 0 0 15px 15px;
}

input[type='number'] {
  width: 70px;
  padding: 10px;
  border: 2px solid #ccc;
  border-radius: 15px;
  outline: none;
}

button {
  margin: 0;
  padding: 10px;
  background-color: #37495c;
  color: #fff;
  border-radius: 15px;
}

button:hover {
  background-color: #2980b9;
  cursor: pointer;
}

#resultado {
  margin-top: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  border-radius: 0 0 15px 15px;
  min-width: 350px;
}

h2 {
  font-weight: bold;
  font-size: 1.25rem;
  text-align: center;
  width: 100%;
  margin: 0;
  padding: 10px;
  background-color: #37495c;
  color: #fff;
  border-radius: 0 0 15px 15px;
}

ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

li {
  padding: 5px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.erro {
  color: #e74c3c;
  text-align: center;
  font-weight: bold;
}