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

body {
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #fff;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.container {
  max-width: 400px;
  width: 100%;
  text-align: center;
}

h1 {
  margin-bottom: 10px;
  font-size: 1.8rem;
}

p {
  margin-bottom: 20px;
  color: #94a3b8;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  margin-bottom: 10px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: #22c55e;
  color: white;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background: #16a34a;
}

#result {
  margin-top: 20px;
  padding: 15px;
  background: #1e293b;
  border-radius: 8px;
  min-height: 50px;
}