* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f8f8f8;
}
.container {
  width: 80%;
  max-width: 800px;
  border: 2px solid black;
  padding: 20px;
  background-color: white;
}
.header,
.content,
.footer {
  border: 2px solid red;
  padding: 20px;
  text-align: center;
}
.header {
  border-color: black;
  margin-bottom: 20px;
}
.header h1 {
  font-size: 24px;
  margin-bottom: 10px;
}
.header h2 {
  font-size: 18px;
  color: red;
}
.content {
  margin-bottom: 20px;
}
.form-row,
.form-row-cabecera {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  align-items: flex-end;
}
.form-column {
  flex: 1;
  margin-right: 10px;
}
.form-column-cabecera {
  flex: 1;
  margin-right: 10px;
}
.form-column:last-child {
  margin-right: 0;
}
.form-column-.form-column-cabecera {
  margin-right: 0;
}
.form-column label {
  display: block;
  margin-bottom: 5px;
}
.form-column-cabecera label {
  display: block;
  margin-bottom: 5px;
}
.form-column input {
  width: 100%;
  padding: 5px;
}
.form-column-cabecera input {
  width: 100%;
  padding: 5px;
}
button {
  margin-top: 10px;
  padding: 10px 20px;
  background-color: red;
  color: white;
  border: none;
  cursor: pointer;
}
#mascampos {
  margin-top: 10px;
  padding: 10px 20px;
  background-color: blue;
  color: white;
  border: none;
  cursor: pointer;
}
#excel {
  margin-top: 10px;
  padding: 10px 20px;
  background-color: green;
  color: white;
  border: none;
  cursor: pointer;
}
button:hover {
  background-color: darkred;
}
.remove-button {
  padding: 5px 10px;
  background-color: darkred;
  color: white;
  border: none;
  cursor: pointer;
  font-size: 18px;
}
.remove-button:hover {
  background-color: red;
}
.footer p {
  font-size: 14px;
  color: red;
}
.form-column input[type="text"] {
  width: 300px;
}
.form-column input[name="importe[]"] {
  width: 100px;
}
.form-column input[name="consumo[]"] {
  width: 200px;
}
.form-column .remove-button {
  width: 50px;
  padding: 5px;
}

@media (max-width: 800px) {
  .container {
    width: 95%;
    padding: 10px;
  }

  .header,
  .content,
  .footer {
    padding: 10px;
  }

  .form-row,
  .form-row-cabecera {
    flex-direction: column;
    align-items: stretch;
  }

  .form-column,
  .form-column-cabecera {
    margin-right: 0;
    margin-bottom: 10px;
  }

  .form-column input,
  .form-column-cabecera input {
    width: 100%;
  }

  button,
  #mascampos,
  #excel {
    width: 100%;
    padding: 10px;
  }

  .remove-button {
    width: 100%;
  }

  .form-column input[name="formula[]"],
  .form-column input[name="importe[]"],
  .form-column input[name="consumo[]"] {
      width: 100%;
  }
}