* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: linear-gradient(135deg, #dff6ff, #a8ebc6);
  min-height: 100vh;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#saudacao {
  margin-bottom: 150px;
  color: #2c3e50;
}

button {
  width: 70vh;
  max-width: 300px;
  padding: 15px;
  margin: 10px 0;
  border: none;
  border-radius: 12px;
  background: #4da8da;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #3c91bf;
}

.ajuda {
  background: #6ec6ca;
}

.ajuda:hover {
  background: #58afb2;
}