Nessun ID centro specificato nella richiesta GET
<style>
#openModal1 {
  display: block;
  margin: 0 auto;
}
#openModal2 {
  display: block;
  margin: 0 auto;
}

.flex
{
  width:80%;
  min: width 80 !important;
  border-radius: 25px;
    margin:5% auto;
}

.container-content
{
display:flex;

}

button {
  font-size: 18px;
  color: #6d676e;
  font-family: inherit;
  font-weight: 800;
  cursor: pointer;
  position: relative;
  border: none;
  background: none;
  text-transform: uppercase;
  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
  transition-duration: 800ms;
  transition-property: color;
}

button:focus,
button:hover {
  color: #CC912E;
}

button:focus:after,
button:hover:after {
  width: 100%;
  left: 0%;
}

button:after {
  content: "";
  pointer-events: none;
  bottom: -2px;
  left: 50%;
  position: absolute;
  width: 0%;
  height: 2px;
  background-color: #CC912E;
  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
  transition-duration: 400ms;
  transition-property: width, left;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
  }
  .modal-content {
    background-color: #fefefe;
    margin: 1% auto; /* Centrare verticalmente e orizzontalmente */
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 680px; /* Dimensione massima del modulo */
    color:#6d676e;
    transition: all 2s ease; /* Definizione dell'animazione di transizione */

  }
  .close {
    color: #aaa;
    font-size: 20px;
    font-weight: bold;
  }
  .close:hover,
  .close:focus {
    color: red;
    text-decoration: none;
    cursor: pointer;
  }
  
  .bottone-centrale {
    text-align: center;


  }

  .bottone-centraleee {
    text-align: center;
    margin-top: 5%;
    justify-content: center;
  }

  .bottone-c {
    text-align: center;
    margin-top: 1%;
  }
  
  .logo img {
    width: 180px;
    height: 100%;
  }



  .footer-content {
    margin-top: 1.2%;
    display: flex;
    justify-content: space-around;
  }
  .container-svg svg {
    width: 30px;
    height: 30px;
    fill: #cc912e;
    margin: 0 10px;
    animation: zoomInOut 3s infinite alternate; /* Applica l'animazione di zoom in/out */
  }

  footer {

    position: fixed;
    bottom: 0;
    width: 100%;
  }


a
{
  font-size:0px;
}

.modal-content:hover
{
border-radius:20px;
border:1px solid #cc912e;

}

.space
{
margin-bottom:15px;
}

.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--bs-body-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bs-body-bg);
    background-clip: padding-box;
    border:1px solid #cc912e;
    border-radius: var(--bs-border-radius);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}
button, input, optgroup, select, textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}


.form-select
{
  border:1px solid #cc912e;
 
}



body {
  font-family: "Nunito", sans-serif;
  font-optical-sizing: auto;
  font-weight: <weight>;
  background-repeat: no-repeat;
  background-size: cover;
  font-style: normal;
}

#visible
{
  font-size:15px;
}

.navbar {
  border-bottom: 1px dashed #cc912e;
}
#openModal1 {
  display: block;
  margin: 0 auto;
}
#openModal2 {
  display: block;
  margin: 0 auto;
}


.flex
{
  width:80%;
  min: width 80 !important;
  border-radius: 25px;
    margin:5% auto;
}

.container-content
{
display:flex;

}

button {
  font-size: 18px;
  color: #6d676e;
  font-family: inherit;
  font-weight: 800;
  cursor: pointer;
  position: relative;
  border: none;
  background: none;
  text-transform: uppercase;
  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
  transition-duration: 800ms;
  transition-property: color;
}

button:focus,
button:hover {
  color: #CC912E;
}

button:focus:after,
button:hover:after {
  width: 100%;
  left: 0%;
}

button:after {
  content: "";
  pointer-events: none;
  bottom: -2px;
  left: 50%;
  position: absolute;
  width: 0%;
  height: 2px;
  background-color: #CC912E;
  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
  transition-duration: 400ms;
  transition-property: width, left;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
  }
  .modal-content {
    background-color: #fefefe;
    margin: 1% auto; /* Centrare verticalmente e orizzontalmente */
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 680px; /* Dimensione massima del modulo */
    color:#6d676e;
    transition: all 2s ease; /* Definizione dell'animazione di transizione */

  }
  .close {
    color: #aaa;
    font-size: 20px;
    font-weight: bold;
  }
  .close:hover,
  .close:focus {
    color: red;
    text-decoration: none;
    cursor: pointer;
  }
  
  .bottone-centrale {
    text-align: center;


  }

  .bottone-centraleee {
    text-align: center;
    margin-top: 5%;
    justify-content: center;
  }

  .bottone-c {
    text-align: center;
    margin-top: 1%;
  }
  
  .logo img {
    width: 180px;
    height: 100%;
  }



  .footer-content {
    margin-top: 1.2%;
    display: flex;
    justify-content: space-around;
  }
  .container-svg svg {
    width: 30px;
    height: 30px;
    fill: #cc912e;
    margin: 0 10px;
    animation: zoomInOut 3s infinite alternate; /* Applica l'animazione di zoom in/out */
  }

  footer {

    position: fixed;
    bottom: 0;
    width: 100%;
  }


a
{
  font-size:0px;
}

.modal-content:hover
{
border-radius:20px;
border:1px solid #cc912e;

}

.space
{
margin-bottom:15px;
}

.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--bs-body-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bs-body-bg);
    background-clip: padding-box;
    border:1px solid #cc912e;
    border-radius: var(--bs-border-radius);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

button, input, optgroup, select, textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}


.form-select
{
  border:1px solid #cc912e;
 
}


#visible
{
  font-size:15px;
}

.navbar {
  border-bottom: 1px dashed #cc912e;
}

</style>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Homepage preventivo</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,200..1000;1,200..1000&display=swap" rel="stylesheet">
</head>
<style>
body {
  font-family: "Nunito", sans-serif;
  font-optical-sizing: auto;
  font-weight: <weight>;
  background-repeat: no-repeat;
  background-size: cover;
  font-style: normal;
}


.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--bs-body-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bs-body-bg);
    background-clip: padding-box;
    border:1px solid #cc912e;
    border-radius: var(--bs-border-radius);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.form-select
{
  border:1px solid #cc912e;
 
}

.vertical-bar {
  width: 1px; /* Larghezza della barra */
  height: 10vh; /* Altezza della barra pari all'altezza della viewport */
  background-color: #cc912e; /* Colore della barra */
margin-left:5px;
margin-right:5px;
}







</style>
<body>
<nav class="navbar navbar-expand-lg bg-body-tertiary">
    <div class="container-fluid">
    <a class="navbar-brand" href="#">    
      <div class="logo">
      <img src="logo.svg" alt="Logo"  class="image-transition">
      </div>
    </a>
    <div class="col-auto ms-auto">
    <a href="ricerca-preventivo.php?id_centro=" id="visible">
    <button type="submit" class="text-left" id="">CERCA PREVENTIVO</button>
</a>
</div>
</div>
</nav>


<div id="modal1" class="modal">
  <div class="modal-content">
    <span class="close">&times;</span>
    <h2 style="text-align:center;margin-bottom:3%">Richiesta preventivo</h2>
    <form id="form1" action="/submit_form1" method="post">
<div class="row g-3">
  <div class="col-md-4 text-center">
  <label for="validationCustom01" class="form-label"><strong>Nome</strong></label><br>
    <input type="name" class="form-control" id="inputEmail4" required>
  </div>
  <div class="col-md-4 text-center">
    <label for="inputPassword4" class="form-label"><strong>Cognome</strong></label>
    <input type="surname" class="form-control" id="inputEmail4" required>
  </div>
  <div class="col-md-4 text-center">
    <label for="inputPassword4" class="form-label"><strong>Data di Nascita</strong></label>
    <input type="date" class="form-control" id="inputEmail4" required>
  </div>
</div>
<div class="space"></div>
<div class="row g-3">
  <div class="col-6 text-center">
    <label for="inputAddress" class="form-label"><strong>Email</strong></label>
    <input type="email" class="form-control" id="inputEmail4" required >
  </div>
  <div class="col-6 text-center">
    <label for="inputAddress2" class="form-label"><strong>Numero di telefono</strong></label>
    <input type="number" class="form-control" id="inputAddress2" required >
  </div>
</div>
<div class="space"></div>
<div class="row g-3">
  <div class="col-6">
  <label for="inputAddress" class="form-label"><strong>Prima zona</strong></label>
<select class="form-select" aria-label="Default select example" required>
  <option selected>Zona 1</option>
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
</select>
</div>
<div class="col-6">
  <label for="inputAddress" class="form-label"><strong>Seconda zona</strong></label>
  <select id="seconda-zona" class="form-select" aria-label="Default select example" required>
    <option selected>Zona 2</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
</div>
</div>
<div class="space"></div>
<div class="row g-3">
  <div class="col-6">
  <label for="inputAddress" class="form-label"><strong>Terza zona</strong></label>
<select class="form-select" aria-label="Default select example">
<option selected>Zona 3</option>
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
</select>
</div>
<div class="col-6">
  <label for="inputAddress" class="form-label"><strong>Quarta zona</strong></label>
  <select id="selectOptions" class="form-select" aria-label="Default select example">
    <option selected>Zona 4</option>
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
  </select>
</div>
<div class="space"></div>
<div class="bottone-c">
  <label class="form-label"><strong>Sesso</strong></label><br>
    <div class="form-check form-check-inline">
        <input class="form-check-input" type="radio" name="sesso" id="maschio" value="maschio">
        <label class="form-check-label" for="maschio"><strong>Maschio</strong></label>
    </div>
    <div class="form-check form-check-inline">
      <input class="form-check-input" type="radio" name="sesso" id="femmina" value="femmina">
      <label class="form-check-label" for="femmina"><strong>Femmina</strong></label>
      </div>
</div>
  <div class="bottone-centrale">
  <button type="submit" class="text-center">Invia dati </button>
  </div>
</div>
</form>
</div>
</div>


<div id="modal2" class="modal">
    <div class="modal-content">
        <span class="close">&times;</span>
        <h2 style="text-align:center; color:#6d676e">Richiesta preventivo per id cliente </h2>
        <div class="bottone-centraleee">
        <form id="form2" action="/submit_form2" method="post">
        <div class="spazio" style="width:50%; margin:0 auto;">
        <label for="inputAddress2" class="form-label"><strong>Inserisci l'id del cliente :</strong></label>
        <input type="number" class="form-control" id="inputAddress2"><br> 
        <button type="submit" class="text-center">Invia dati </button>
        </form>
  </div>
  </div>
</div>
</div>



<h2 style="text-align:center; margin-top:1%;">
    <span style="color:#6d676e;">Preventivi</span>
    <span style="color:#cc912e;">EPIL POINT</span>
    <br>
    </h2>
    <h4 style="text-align:center">
   <br></h4>
<br>
<div class="flex">
<div class="container-content">
<button id="openModal1" style="">E' UN NUOVO CLIENTE?</button>
<div class="vertical-bar"></div>

<button id="openModal2">GIA' CLIENTE DI FLOWWW</button>
</div>



















<script>
var modal1 = document.getElementById("modal1");
var modal2 = document.getElementById("modal2");



var btn1 = document.getElementById("openModal1");
var btn2 = document.getElementById("openModal2");




var span1 = document.getElementsByClassName("close")[0];
var span2 = document.getElementsByClassName("close")[1];


btn1.onclick = function() {
  modal1.style.display = "block";
}
btn2.onclick = function() {
  modal2.style.display = "block";
}




span1.onclick = function() {
  modal1.style.display = "none";
}
span2.onclick = function() {
  modal2.style.display = "none";
}




window.onclick = function(event) {
  if (event.target == modal1) {
    modal1.style.display = "none";
  }
  if (event.target == modal2) {
    modal2.style.display = "none";
  }

}
</script>
</div>




















<footer>
    <div class="footer-content">
        <div class="container-svg">
          <a href="https://www.facebook.com/epilpointitalia/">
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