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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f0f2f5;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  padding: 40px;
  width: 100%;
  max-width: 480px;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 24px;
  color: #1a1a2e;
}

#mac-form {
  display: flex;
  gap: 8px;
}

#mac-input {
  flex: 1;
  padding: 10px 14px;
  font-size: 1rem;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  outline: none;
  font-family: monospace;
}

#mac-input:focus {
  border-color: #4f46e5;
  box-shadow: 0 0 0 2px rgba(79,70,229,0.2);
}

button {
  padding: 10px 20px;
  background: #4f46e5;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: #4338ca;
}

.result {
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 1rem;
}

.result.hidden {
  display: none;
}

.result.success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.result.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}