body {
  font-family: 'Arial', sans-serif;
  background: #0f0f0f;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: rgba(20, 20, 20, 0.95);
  padding: 25px 30px;
  border-radius: 15px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 249, 255, 0.7); /* efeito neon */
}

h1 {
  margin-bottom: 10px;
  color: #00f9ff; /* título neon azul */
  text-shadow: 0 0 10px #00f9ff;
}

label {
  display: block;
  margin-top: 12px;
  text-align: left;
  color: #ff00c8; /* labels em rosa neon */
  text-shadow: 0 0 5px #ff00c8;
}

input {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  background: #1c1c1c;
  border: 2px solid #00f9ff;
  color: #fff;
  border-radius: 5px;
  outline: none;
  font-size: 14px;
  box-shadow: 0 0 8px #00f9ff;
}

input:focus {
  border-color: #ff00c8;
  box-shadow: 0 0 10px #ff00c8;
}

button {
  background: #39ff14;
  color: #000;
  font-weight: bold;
  padding: 12px;
  border: none;
  margin-top: 15px;
  width: 100%;
  font-size: 16px;
  cursor: pointer;
  border-radius: 8px;
  box-shadow: 0 0 10px #39ff14;
  transition: all 0.2s ease-in-out;
}

button:hover {
  background: #2ecc10;
  box-shadow: 0 0 15px #39ff14;
}

#resultado {
  margin-top: 20px;
  font-weight: bold;
  color: #f7ff00; /* resultado em amarelo neon */
  text-shadow: 0 0 8px #f7ff00;
}
canvas#backgroundCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1; /* fica atrás de tudo */
  background: #0f0f0f;
}