*{box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}
html,body{margin:0;height:100%;background:#111;color:#fff;overflow:hidden}
[hidden]{display:none!important}

#topInstallBar{position:fixed;top:0;left:0;right:0;height:48px;display:flex;align-items:center;gap:10px;padding:0 14px;background:#181b22;z-index:5;border-bottom:1px solid #242833}
#topInstallBar .logo{width:26px;height:26px;border-radius:7px}
#topInstallBar .brand{font-weight:700;font-size:14px}
#topInstallBar .spacer{flex:1}
.icon-btn{background:transparent;border:0;color:#fff;font-size:22px;cursor:pointer;padding:4px 8px;border-radius:8px}
.icon-btn:hover{background:#242833}

#landing{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#0f1116;padding-top:48px}
#landing .box{width:92%;max-width:380px;background:#181b22;padding:28px;border-radius:14px;box-shadow:0 0 30px rgba(0,0,0,.5)}
#landing h1{margin:0 0 6px;font-size:26px;text-align:center}
#landing .muted{color:#9aa4b2;font-size:13px;text-align:center;margin:0 0 20px;line-height:1.4}
#landing input{width:100%;padding:13px;margin:6px 0;border:0;border-radius:8px;background:#242833;color:#fff;font-size:15px}
#landing .row{display:flex;gap:8px}
#landing .row input{flex:1}
#landing .or{text-align:center;color:#6b7480;font-size:12px;margin:10px 0}

#camBlocked{display:flex;align-items:center;justify-content:center;min-height:100vh;background:#0f1116;padding-top:48px}
#camBlocked .box{width:92%;max-width:420px;background:#181b22;padding:28px;border-radius:14px;box-shadow:0 0 30px rgba(0,0,0,.5)}
#camBlocked h1{margin:0 0 6px;font-size:24px;text-align:center}
#camBlocked .muted{color:#9aa4b2;font-size:13px;text-align:center;margin:0 0 18px;line-height:1.4}
#camBlocked .howto{background:#242833;border-radius:8px;padding:14px 18px;margin-bottom:18px;font-size:13px;line-height:1.6}
#camBlocked .howto ol{margin:8px 0 0;padding-left:20px}
#camBlocked .btn{width:100%;margin-bottom:8px}
.btn{padding:13px;border:0;border-radius:8px;background:#2f5bff;color:#fff;font-size:15px;cursor:pointer;font-weight:600}
.btn:hover{opacity:.88}
.btn.small{padding:8px 12px;font-size:16px;background:#242833}
.btn.toggle-off{background:#c0392b;position:relative}
.btn.toggle-off::after{content:"";position:absolute;left:15%;right:15%;top:50%;height:2px;background:#fff;transform:rotate(-45deg)}
.btn.danger{background:#c0392b}
.btn.primary{width:100%}
.err{color:#ff7676;font-size:13px;margin-top:8px;min-height:16px}

#room{display:flex;flex-direction:column;height:100vh}
#topbar{height:48px;background:#181b22;display:flex;align-items:center;gap:8px;padding:0 12px;flex:0 0 auto}
#topbar .spacer{flex:1}
#roomLabel{font-size:13px;color:#9aa4b2}

#videoGrid{flex:1;display:grid;gap:6px;padding:6px;min-height:0}
.tile{position:relative;background:#000;border-radius:8px;overflow:hidden;min-height:0}
.tile video{width:100%;height:100%;object-fit:cover;display:block}
.tile .label{position:absolute;left:0;bottom:0;right:0;padding:5px 8px;background:linear-gradient(transparent,rgba(0,0,0,.7));font-size:13px}
.tile.muted-audio .label::after{content:" 🔇"}
.camOffOverlay{position:absolute;inset:0;background:#1c1f29;display:flex;align-items:center;justify-content:center;font-size:48px;z-index:2}
.camOffOverlay span{opacity:.5}

/* Grilles adaptatives par nombre de participants */
#videoGrid[data-count="1"]{grid-template-columns:1fr;grid-template-rows:1fr}
#videoGrid[data-count="2"]{grid-template-columns:1fr 1fr;grid-template-rows:1fr}
#videoGrid[data-count="3"]{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}
#videoGrid[data-count="3"] .tile:first-child{grid-column:1/3}
#videoGrid[data-count="4"]{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}
#videoGrid[data-count="5"],#videoGrid[data-count="6"]{grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr}
#videoGrid[data-count="7"],#videoGrid[data-count="8"],#videoGrid[data-count="9"]{grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr 1fr}

@media (max-width:700px){
  #videoGrid[data-count="2"]{grid-template-columns:1fr;grid-template-rows:1fr 1fr}
  #videoGrid[data-count="3"]{grid-template-columns:1fr;grid-template-rows:1fr 1fr 1fr}
  #videoGrid[data-count="3"] .tile:first-child{grid-column:1}
  #videoGrid[data-count="4"]{grid-template-columns:1fr;grid-template-rows:repeat(4,1fr)}
}