body {
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
   text-align: center;
   background: url("sternenhimmel.jpg") no-repeat center center fixed; 
   background-size: cover;
   color:  rgb(0, 174, 255);
   margin-left: 5%;
   margin-right: 5%;
 
}

header {
    
    height: 10vh;
    flex: 1 1 100%;
    margin-bottom: 50px;
    background-color: transparent;
   
    margin-top: 25px;
    text-align: center;
   
 
}

nav {
    height: 5vh;
    flex: 1 1 100%;
    margin-bottom: 20px;
    width: 100%;

    
}

main {
    height: 75vh;
    flex: 1 1 100%;
    background-color: rosybrown;
}

footer {
    height: 10vh;
    flex: 1 1 100%;
    background-color: red;
}

header h1 a {
    font-size: 400px; /* Adjust the font size value as needed */
}

.center-align {
    text-align: left;
  }

  .wrapper {
    display: flex;
  }
  
  .column1,
  .column2 {
    flex: 1;
    margin-left: 2.5%;
    margin-right: 2.5%;
    
  }
  .bg-light {
    background-color: transparent!important;
    --bs-bg-opacity: 1;
   /* background-color: rgba(var(--bs-light-rgb),var(--bs-bg-opacity));*/
}
/*css pour ajuster le visuel de la barre de navigation*/
.navbar {
    --bs-navbar-padding-x: 0;
    --bs-navbar-padding-y: 0.5rem;
    --bs-navbar-color: #0dcaf0;
    --bs-navbar-hover-color: #ffc107;
    --bs-navbar-disabled-color: rgb(255, 255, 255);
    --bs-navbar-active-color: #dc3545;
    --bs-navbar-brand-padding-y: 0.3125rem;
    --bs-navbar-brand-margin-end: 1rem;
    --bs-navbar-brand-font-size: 1.25rem;
    --bs-navbar-brand-color: rgba(0, 0, 0, 0.9);
    --bs-navbar-brand-hover-color: rgba(0, 0, 0, 0.9);
    --bs-navbar-nav-link-padding-x: 0.5rem;
    --bs-navbar-toggler-padding-y: 0.25rem;
    --bs-navbar-toggler-padding-x: 0.75rem;
    --bs-navbar-toggler-font-size: 2rem;
    --bs-navbar-toggler-icon-bg: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 0, 0, 0.55%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e);
    --bs-navbar-toggler-border-color: rgba(212, 1, 1, 0.1);
    --bs-navbar-toggler-border-radius: 0.375rem;
    --bs-navbar-toggler-focus-width: 0.25rem;
    --bs-navbar-toggler-transition: box-shadow 0.15s ease-in-out;
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: var(--bs-navbar-padding-y) var(--bs-navbar-padding-x);
}
.navbar-brand {
    padding-top: var(--bs-navbar-brand-padding-y);
    padding-bottom: var(--bs-navbar-brand-padding-y);
    margin-right: var(--bs-navbar-brand-margin-end);
    font-size: var(--bs-navbar-brand-font-size);
    color: #0dcaf0;
    text-decoration: none;
    white-space: nowrap;
    

}


.navbar-brand:focus, .navbar-brand:hover {
    color: #ffc107!important;
  }