* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
  color: #000000;
}

.contenedor-principal {
  width: 760px;
  margin: 0 auto;
  padding: 15px 20px 30px;
}

.carrito {
  width: 660px;
  margin: 0 auto;
}

.carrito h1 {
  margin: 0 0 22px;
  text-align: center;
  color: #d84315;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  text-decoration: underline;
  text-shadow: 1px 1px 1px #bfbfbf;
}

.formulario-compra {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
}

.formulario-compra label {
  font-size: 14px;
}

#productoSelect {
  width: 230px;
  height: 28px;
  border: 2px solid #000000;
  background-color: #ffffff;
  font-size: 13px;
}

#cantidadInput {
  width: 60px;
  height: 32px;
  border: 3px solid #f0b000;
  font-size: 16px;
  text-align: center;
}

#comprarBtn,
#imprimirBtn {
  border: 1px solid #5a8ebf;
  border-radius: 2px;
  background: linear-gradient(#4b9dea, #1d63a7);
  color: #ffffff;
  font-weight: bold;
  box-shadow: 2px 2px 4px #808080;
  cursor: pointer;
}

#comprarBtn {
  width: 90px;
  height: 34px;
}

#imprimirBtn {
  width: 92px;
  height: 45px;
  font-size: 11px;
}

#comprarBtn:hover,
#imprimirBtn:hover {
  background: linear-gradient(#63b0f2, #1c5c99);
}

.opcion-factura {
  display: flex;
  align-items: center;
  width: 170px;
  margin: 6px 0 8px 64px;
  font-size: 14px;
}

.opcion-factura input {
  width: 18px;
  height: 18px;
  margin-right: 4px;
  outline: 3px solid #f0b000;
}

.tabla-carrito {
  width: 100%;
  height: 250px;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 12px;
}

.tabla-carrito th,
.tabla-carrito td {
  border: 1px solid #000000;
  padding: 6px;
  text-align: center;
  vertical-align: top;
}

.tabla-carrito th {
  height: 32px;
  background-color: #ffffff;
  font-weight: normal;
}

.tabla-carrito td {
  height: 35px;
}

.tabla-vacia {
  height: 215px !important;
  color: #666666;
  vertical-align: middle !important;
}

.zona-inferior {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-top: 25px;
}

.totales {
  width: 190px;
}

.fila-total {
  display: grid;
  grid-template-columns: 85px 100px;
  align-items: center;
  margin-bottom: 0;
}

.fila-total span {
  padding-right: 8px;
  text-align: right;
  font-size: 13px;
}

.fila-total input {
  height: 32px;
  border: 1px solid #000000;
  background-color: #ffffff;
  text-align: right;
  font-size: 13px;
  font-weight: bold;
}

@media (max-width: 800px) {
  .contenedor-principal {
    width: 100%;
    padding: 20px 10px;
  }

  .carrito {
    width: 100%;
  }

  .carrito h1 {
    font-size: 19px;
  }

  .formulario-compra {
    flex-wrap: wrap;
  }

  #productoSelect {
    width: 230px;
  }

  .tabla-carrito {
    font-size: 11px;
  }

  .zona-inferior {
    gap: 15px;
  }
}