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

body {
  background: #1e1e1e;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.app {
  background: #2b2b2b;
  width: 100%;
  max-width: 400px;
  padding: 20px;
  border-radius: 10px;
}

h1 {
  text-align: center;
  margin-bottom: 5px;
}

.subtitle {
  text-align: center;
  font-size: 14px;
  color: #bdbdbd;
  margin-bottom: 20px;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 14px;
  margin-top: 10px;
}

input,
textarea {
  margin-top: 5px;
  padding: 8px;
  border-radius: 5px;
  border: none;
}

textarea {
  resize: none;
  min-height: 80px;
}

button {
  margin-top: 15px;
  padding: 10px;
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #43a047;
}

#formMessage {
  margin-top: 15px;
  text-align: center;
  font-size: 14px;
}

/* Responsive */
@media (max-width: 480px) {
  .app {
    padding: 15px;
  }
}