body {
  background: #111;
  color: #eee;
  font-family: sans-serif;
  padding: 20px;
  padding-bottom: 120px;
  
}

.container {
  max-width: 450px;
  margin: 0 auto;
}

h2 {
  margin-top: 30px;
  border-left: 5px solid #4fc3f7;
  padding-left: 10px;
}

.card {
  background: #222;
  padding: 15px;
  border-radius: 10px;
  margin-top: 15px;
}

label {
  display: block;
  margin-top: 10px;
  font-size: 0.9rem;
}

input {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  background: #333;
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 1rem;
}

button {
  width: 100%;
  padding: 12px;
  margin-top: 15px;
  background: #4fc3f7;
  color: #000;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: bold;
}

.result {
  background: #1b1b1b;
  padding: 10px;
  margin-top: 15px;
  border-left: 4px solid #4fc3f7;
  border-radius: 6px;
}

.hidden {
  display: none;
}