body {
  font-family: Arial, sans-serif;
  padding: 30px;
  background: #f4f4f4;
}

button {
  background: rgb(0, 0, 0);
  color: rgb(255, 255, 255);
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

#cuadroRojoModal {
  display: none;
  background: #eafaf1;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  margin-top: 20px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  min-width: 900px;
}

th {
  background-color: red;
  color: white;
  padding: 8px;
  text-align: center;
  white-space: nowrap;
}

td {
  background-color: #eafaf1;
  padding: 5px;
  text-align: center;
  white-space: nowrap;
}

input, select {
  width: 100%;
  padding: 5px;
  box-sizing: border-box;
}

/* Vista previa del mensaje con scroll interno */
#vistaPrevia {
  margin: 20px auto;
  width: 100%;
  max-width: 100%;
  border: 1px solid #ccc;
  padding: 20px;
  background: #fff;
  text-align: left;
  word-wrap: break-word;
  box-sizing: border-box;
  overflow-x: auto;
}

#vistaPrevia > div {
  min-width: 900px;
}

/* RESPONSIVE TABLET */
@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  button {
    width: 100%;
    margin-top: 10px;
  }

  #cuadroRojoModal {
    padding: 10px;
  }

  table {
    min-width: 700px;
  }

  th, td {
    font-size: 12px;
    padding: 5px;
  }

  #vistaPrevia {
    padding: 15px;
    font-size: 14px;
  }
}

/* RESPONSIVE CELULAR */
@media (max-width: 480px) {
  body {
    padding: 10px;
  }

  table {
    min-width: 600px;
  }

  th, td {
    font-size: 11px;
    padding: 4px;
  }

  button {
    font-size: 14px;
    padding: 8px 16px;
  }

  #vistaPrevia {
    padding: 10px;
    font-size: 13px;
  }
}