* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f6f7fb;
  color: #222;
}

.container {
  max-width: 720px;
  margin: 48px auto;
  padding: 24px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.form {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
}

button {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: #1e3a8a;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.result {
  margin-top: 16px;
  font-weight: 600;
}