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

body {
  background: #f4f6f9;
  padding: 20px;
}

.container {
  max-width: 1000px;
  margin: auto;
}

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

.stats {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

.card {
  flex: 1;
  background: #2c3e50;
  color: white;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}

.form-section,
.filtro,
.lista {
  background: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 10px;
}

form {
  display: grid;
  gap: 10px;
}

input, select, textarea, button {
  padding: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background: #3498db;
  color: white;
  cursor: pointer;
  border: none;
}

ul {
  list-style: none;
}

li {
  padding: 10px;
  border-bottom: 1px solid #eee;
}