* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  list-style: none;
  box-sizing: border-box;
}

body {
  background: linear-gradient(
    180deg,
    rgba(240, 240, 240, 1) 0%,
    rgba(238, 238, 238, 1) 50%,
    rgba(204, 204, 204, 1) 100%
  );
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

h1 {
  color: #333;
  margin-bottom: 20px;
  text-align: center;
}

p {
  color: #555;
  margin-bottom: 10px;
}

input {
  width: 80px;
  padding: 8px;
  border: 1px solid #aaa;
  border-radius: 6px;
  margin: 5px;
  font-size: 16px;
}

button {
  background-color: #007BFF;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
  margin-top: 15px;
}

button:hover {
  background-color: #0056b3;
}

#resultado {
  margin-top: 20px;
  font-weight: bold;
  color: #3f77f1;
  font-size: 18px;
  text-align: center;
}

/* Bloques estilo tarjeta */
.card-style {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 30px;
  max-width: 450px;
  width: 100%;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-style:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

/* Responsive para móviles */
@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  .card-style {
    padding: 20px;
  }

  input {
    width: 70px;
    font-size: 14px;
  }

  button {
    width: 100%;
  }
}