body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #615151, #e0e0e0);
  padding: 30px;
  display: flex;
  justify-content: center;
  align-items: start;
  min-height: 100vh;
}

.contenedor {
  max-width: 600px;
  width: 100%;
  background-color: #ddd5d5; 
  padding: 20px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

form input,
form select,
form button {
  margin: 5px 0;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
}

form,
.filtros,
#grafico-gastos {
  margin-bottom: 20px;
}

.filtros {
  margin-top: 20px;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin: 8px 0;
  background: #f0f0f0;
  padding: 10px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

button {
  padding: 10px;
  cursor: pointer;
  border: none;
  border-radius: 4px;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover {
  background-color: #dcdcdc;
  transform: scale(1.02);
}

/* Botón específico para eliminar */
li button {
  background-color: #ff4d4d;
  color: white;
}

li button:hover {
  background-color: #cc0000;
}