/* selecteur universel */ /* ce truc sert à éviter les decallages de padding ou margin par defaut existant sur certaines balises */
* { box-sizing: border-box; }

/*body { 
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; 
    line-height: 1.5; 
    margin: 0; 
    padding: 0; 
    background: #f7f7fb; 
    color: #222; 
}
*/

body 
{   font-family : Trirong, Poppins, sans-serif; 
    font-size : 20px; 
    background-color: rgb(248, 243, 243);
}

.grand_cadre_du_chat { width: 60%; margin: auto; margin-top:20px; margin-bottom:270px; height: auto; border-radius: 20px; }
.container { width: 100%; height: auto; background: #fff; padding: 7px; border-radius: 20px; box-shadow: 0 10px 25px rgba(0,0,0,0.08); }
.chat-form .row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
input[type="text"], textarea { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 10px; }
textarea { min-height: 90px; resize: vertical; }
button { padding: 10px 14px; border: none; border-radius: 10px; cursor: pointer; background: #2f6fed; color: #fff; font-size: 15px;}
button:hover { opacity: 0.95; }
.poster_un_chat { width: 90%; margin-left: 5%; }
.le_chat { display: flex; flex-direction: column; gap: 10px; width: 90%; margin-left :5%; border-radius: 10px; }
.chat-line { padding: 10px 12px; background-color: yellow /*#8aa1f5*/; border: 1px solid #e1e6ff; border-radius: 10px; margin-bottom: 20px; }
.empty { color: #777; font-style: italic; }
.status { margin-left: 10px; font-size: .95rem; color:#444; }


.header_avec_image
{
    display : inline-block;
    width : 60%;
    height: 270px;
    margin-left: 20%;
    background-image: url("image_principale.jpg");
    background-position: right; /* Center the image */
    background-repeat: no-repeat;
    background-size: cover;
    border-radius : 20px;
    padding : 10px;
}

.header_sans_image
{
    display : inline-block;
    width : 60%;
    margin-left: 20%;
    height : 500px;
    padding : 10px;
}

h2 
{   font-family : Audiowide; 
    text-align:center; 
    color : blue;
    width : 60%; 
    margin : auto;
    margin-bottom: 20px; 
    border-bottom : 1px black solid; 
    text-shadow:4px 4px 4px white;
}

video 
{ 
    width: 320px; 
    height : 240px;
}

footer 
{   position:fixed; 
    left:10px; 
    right:10px; 
    bottom:10px; 
    background:black; 
    text-align:center; 
    min-height:40px; 
    color:rgba(255, 255, 255, 0.5);
}

iframe, video
{
    width: 100%;
    height : 100%;
    border: 1px solid black;
    border-radius: 10px;
}

/* <= 768px : empile tout en 1 colonne, boutons full width */
@media (max-width: 768px) {

  .header_avec_image, .header_sans_image, h2, .poster_un_chat, .le_chat { 
    width: 90%; 
    margin-left: 5%;
  }
  
   video { 
    width: 100%; 
    height : auto;
   }

   .grand_cadre_du_chat { width: 90%; }

  footer { position: static; }  /* évite de recouvrir le contenu */
}

/* <= 480px : densifie encore */
@media (max-width: 480px) {
    
  .header_avec_image, .header_sans_image, h2, .poster_un_chat, .le_chat { 
    width: 90%; 
    margin-left: 5%;
  }
 
   video { 
    width: 100%; 
    height : auto;
   }

   .grand_cadre_du_chat { width: 90%; }

   footer { position: static; }  /* évite de recouvrir le contenu */
}