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

body {
  min-height: 100vh;
  background: url("img/fundo.jpg") no-repeat center center fixed;
  background-size: cover;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 40px auto;
  padding: 30px;
  background: rgba(0,0,0,0.85);
  color: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

h1 {
  text-align: center;
  margin-bottom: 10px;
}

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

label {
  display: block;
  margin-top: 15px;
  margin-bottom: 5px;
}

select, button {
  width: 100%;
  padding: 12px;
  border-radius: 6px;
  border: none;
  margin-bottom: 10px;
  font-size: 16px;
}

button {
  background: #00bfff;
  color: #000;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background: #1ad1ff;
}

.resultado {
  margin-top: 20px;
  background: #111;
  padding: 15px;
  border-radius: 8px;
}

.hidden {
  display: none;
}

footer {
  margin-top: 20px;
  text-align: center;
  color: #aaa;
}