* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #0b0b0b;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  max-width: 420px;
  width: 100%;
  text-align: center;
}

h1 {
  color: #00ffff;
}

.subtitle {
  color: #ccc;
  margin-bottom: 20px;
}

.card {
  background: #121212;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 0 25px rgba(0,255,255,0.25);
}

label {
  display: block;
  margin-top: 15px;
  text-align: left;
}

select,
input {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 6px;
  border: none;
}

button {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  background: #00ffff;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background: #00cccc;
}

#result {
  margin-top: 20px;
  font-weight: bold;
}

.info {
  margin-top: 30px;
  color: #ccc;
  text-align: left;
}

.info h2 {
  color: #00ffff;
  margin-top: 20px;
}

.info ul {
  margin-left: 20px;
}

.info li {
  margin: 6px 0;
}