:root {
    --primary-color: #0056b3;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --navbar-bg: rgba(0, 0, 64, 0.9);
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --navbar-height: 12rem; /* Altezza della navbar */
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html {
    font-size: 16px;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  .container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
  }
  
  /* Navbar styles */
  #navbar {
    background-color: var(--navbar-bg);
    transition: var(--transition);
    padding: 0.5rem 0;
    /* position: fixed; */
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
  }
  
  .navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
  }
  
  .navbar-brand {
    display: flex;
    align-items: center;
  }
  
  .navbar-brand img.logo {
    width: 100px;
    height: auto;
    /* max-height: 50px !important;  */
    /* per rendere il logo rotondo eliminare max-height */
    object-fit: contain;
  }
  
  .navbar-toggler {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
  }
  
  .navbar-nav {
    display: flex;
    list-style-type: none;
  }
  
  .nav-item {
    margin-left: 1rem;
  }
  
  .nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: var(--transition);
  }
  
  .nav-link:hover {
    color: var(--primary-color);
  }
  
  .btn-responsive {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
  }
  
  .btn-responsive:hover {
    background-color: darken(var(--primary-color), 10%);
  }
  
  /* Hero section */
  .sfondo {
    background-image: url("../immagini/earth-159123_1280.png") !important;
    position: relative;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0; 
  }




  .pianeta{
        background-position: right  !important; 
        background-repeat: no-repeat  !important;
        background-image:url('../immagini/pianeta.jpg')  !important;
        background-size: cover !important;
  }
  
  .sfondo::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.7);
  }
  
  .content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    width: 90%;
    margin: 0 auto;
  }
  
  .testo {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
  }
  
  /* Card styles */
  .card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
    transition: var(--transition);
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  }
  
  .card-img-wrapper {
    height: 200px;
    overflow: hidden;
  }
  
  .card-img-top {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
  }
  
  .card:hover .card-img-top {
    transform: scale(1.05);
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
  }
  
  .card-text {
    color: #6c757d;
    font-size: 1rem;
    line-height: 1.6;
  }
  
  .card-footer {
    background-color: transparent;
    border-top: none;
    padding-top: 1rem;
  }
  
  /* Footer */
  footer {
    background-color: rgba(0, 0, 64, 0.9);
    color: white;
    padding: 2rem 0;
  }
  
  /* Utility classes */
  .section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-color);
  }
  
  .img-fluid {
    max-width: 100%;
    height: auto;
  }
  
  /* Responsive adjustments */
  @media (max-width: 991px) {
    .navbar-toggler {
      display: block;
    }
  
    .navbar-nav {
      display: none;
      width: 100%;
      flex-direction: column;
      align-items: center;
      padding-top: 1rem;
    }
  
    .navbar-nav.show {
      display: flex;
    }
  
    .nav-item {
      margin: 0.5rem 0;
    }
  
    .btn-responsive {
      margin-top: 1rem;
    }
  }
  
  @media (max-width: 768px) {
    html {
      font-size: 14px;
    }
  
    .navbar-brand img.logo {
      width: 80px;
    }
  
    .sfondo {
      min-height: 70vh;
    }
  
    .testo {
      font-size: 1rem;
    }
  
    .section-title {
      font-size: 2rem;
    }
  }
  
  @media (max-width: 480px) {
    html {
      font-size: 12px;
    }
  
    .navbar-brand img.logo {
      width: 60px;
    }
  
    .btn-responsive {
      padding: 0.25rem 0.5rem;
      font-size: 0.875rem;
    }
  
    .card-img-wrapper {
      height: 150px;
    }
  }
  
  /* For extremely small devices like iPhone 4 */
  @media (max-width: 320px) {
    html {
      font-size: 10px;
    }
  
    .navbar-brand img.logo {
      width: 50px;
    }
  
    .btn-responsive {
      padding: 0.25rem 0.4rem;
      font-size: 0.75rem;
    }
  
    .card-img-wrapper {
      height: 120px;
    }
  }
  
  /* Modern article list style */
  .article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
  }
  
  .article-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    /* box-shadow: var(--card-shadow); */
  }
  
  .article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  }
  
  .article-image {
    height: 200px;
    overflow: hidden;
  }
  
  .article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
  }
  
  .article-card:hover .article-image img {
    transform: scale(1.05);
  }
  
  .article-content {
    padding: 1.5rem;
  }
  
  .article-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
  }
  
  .article-excerpt {
    font-size: 0.9rem;
    color: #6c757d;
    margin-bottom: 1rem;
  }
  
  .article-meta {
    font-size: 0.8rem;
    color: #adb5bd;
    display: flex;
    justify-content: space-between;
  }
  
  /* Ensure proper spacing for all sections */
  section {
    padding: 4rem 0;
  }
  
  /* Form styles */
  form input, 
  form textarea {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
  }
  
  form button {
    width: 100%;
  }
  
  /* Accordion styles */
  .accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: white;
  }
  
  .accordion-button:focus {
    box-shadow: none;
    border-color: rgba(0,0,0,.125);
  }
  
  /* Additional responsive adjustments */
  @media (max-width: 576px) {
    .article-list {
      grid-template-columns: 1fr;
    }
  
    .article-image {
      height: 150px;
    }
  }


  @media (max-width: 800px) {
    .w-25 {
        width: 100% !important;
    }
    .p-5{
        padding: 5% !important;
    }
    .testo{
        font-size: 1.2rem;
    }
}


.img-fluid{
    border-radius: 8px !important;
    --transition: all 0.3s ease;
}
.img-fluid:hover{
    --transition: all 0.3s ease;
    -card-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);

}
/*  */

.article-card:hover {
    background: white;
    border-radius: 8px;
    /* overflow: hidden; */
    transition: all 0.3s ease;
    box-shadow: var(--card-shadow);
}


.navbar-toggler{
    background-color:#0d6efd;
    border-color: #0d6efd;
}

.navbar-collapse {
  max-height: calc(100vh - var(--navbar-height));
  /* overflow-y: auto; */
}


@media only screen and (max-height: 800px) {
  .sfondo{
    /* padding-top: var(--navbar-height); */
    height: auto !important;
  }
}


p,h2,h3,div{
  text-align: justify !important;
}







/* toast */
.toast-container {
  z-index: 1060;
}

#customToast {
  background-color: #28a745;
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#customToast .toast-body {
  padding: 16px 20px;
}

#customToast .btn-close {
  font-size: 18px;
  padding: 12px;
  margin-right: 10px;
}






/* overlay  */
.sito1 {
  position: relative;
  cursor: pointer;
}

.sito1 img {
  transition: opacity 0.3s ease;
}

.sito1 .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4); /* Sovrapposizione semi-trasparente più scura */
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sito1:hover img {
  opacity: 0.8; /* L'immagine rimane visibile ma leggermente più scura */
}

.sito1:hover .overlay {
  opacity: 1; /* La sovrapposizione e il testo appaiono sopra l'immagine */
}