:root{
  --blue:#2b6cb0;
  --blue-light:#DFEBF7;
  --border:#b3c0cc;
  --bg:#ffffff;
  --text:#1a202c;
  --muted:#718096;
}

*{box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}
body{margin:0;background:#f4f6f8;color:var(--text)}

#app{height:100vh;display:flex;flex-direction:column}

.topbar{
  height:48px;background:#fff;border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:12px;padding:0 12px;
}
.logo{font-weight:700;color:var(--blue)}
.roomline{flex:1;color:#2d3748}
.me{display:flex;align-items:center;gap:8px}
.btn{
  background:var(--blue);color:#fff;border:0;border-radius:6px;
  padding:6px 10px;cursor:pointer;font-weight:600
}
.btn.small{padding:4px 8px;font-size:12px}
.btn:hover{filter:brightness(0.95)}

.layout{flex:1;display:grid;grid-template-columns:280px 1fr 280px;gap:8px;padding:8px}

.left,.right,.center{display:flex;flex-direction:column;gap:8px}

.panel{
  background:#fff;border:1px solid var(--border);border-radius:8px;
  overflow:hidden;display:flex;flex-direction:column
}
.panel-title{
  padding:8px 10px;background:var(--blue-light);border-bottom:1px solid var(--border);
  font-weight:700;color:#2c5282
}

.rooms{padding:6px;display:flex;flex-direction:column;gap:6px;max-height:260px;overflow:auto}
.room-item{
  display:flex;justify-content:space-between;align-items:center;
  padding:8px;border:1px solid #e2e8f0;border-radius:6px;cursor:pointer;
  background:#fff
}
.room-item.active{border-color:var(--blue);box-shadow:0 0 0 2px #bee3f8}
.room-name{font-weight:700}
.room-meta{font-size:12px;color:var(--muted)}
.create{display:flex;gap:6px;padding:8px;border-top:1px solid #edf2f7}
.create input{
  flex:1;padding:6px;border:1px solid #e2e8f0;border-radius:6px
}

.logsbox{padding:8px;font-size:12px;line-height:1.4;max-height:360px;overflow:auto}
.logsbox .log{margin-bottom:6px;color:#2d3748}
.logsbox .log.muted{color:var(--muted)}

.videos-area{
  background:#fff;border:1px solid var(--border);border-radius:8px;
  padding:8px;min-height:280px;position:relative
}

.video-card{
  width:240px;background:#fff;border:1px solid #e2e8f0;border-radius:8px;
  overflow:hidden;position:absolute;top:8px;left:8px;box-shadow:0 4px 10px rgba(0,0,0,0.08)
}
.video-card.local{z-index:9}
.video-header{
  background:#f7fafc;border-bottom:1px solid #e2e8f0;
  padding:6px 8px;display:flex;justify-content:space-between;align-items:center;font-weight:700
}
.icons{display:flex;gap:6px}
.icon{
  background:#fff;border:1px solid #cbd5e0;border-radius:6px;padding:2px 6px;cursor:pointer;font-size:14px
}
.icon.active{background:#e6fffa;border-color:#38b2ac}
.icon.off{background:#fed7d7;border-color:#e53e3e}

.video-wrap{position:relative;width:100%;height:180px;background:#000}
video{width:100%;height:100%;object-fit:cover}
.cam-off-overlay{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
  background:rgba(0,0,0,0.75);color:#fff;font-weight:700;font-size:14px
}
.video-wrap.off .cam-off-overlay{display:flex}

.remote-grid{
  position:relative;margin-left:260px;display:flex;flex-wrap:wrap;gap:8px;
}
.remote-card{
  width:210px;position:relative;background:#000;border-radius:8px;overflow:hidden;border:1px solid #e2e8f0
}
.remote-card .rname{
  position:absolute;top:0;left:0;right:0;background:rgba(0,0,0,0.6);color:#fff;
  padding:4px 6px;font-size:12px
}

.chat-area{
  background:#fff;border:1px solid var(--border);border-radius:8px;display:flex;flex-direction:column;flex:1;min-height:220px
}
.chatbox{flex:1;padding:8px;overflow:auto;font-size:14px}
.msg{margin:4px 0}
.msg .u{font-weight:700;color:#2c5282}
.msg .t{color:#2d3748}
.msg.sys .t{color:var(--muted);font-style:italic}

.chatinput{display:flex;gap:6px;padding:8px;border-top:1px solid #edf2f7}
.chatinput input{
  flex:1;padding:8px;border:1px solid #e2e8f0;border-radius:6px;font-size:14px
}

.users{padding:6px;display:flex;flex-direction:column;gap:6px;max-height:100%;overflow:auto}
.user-item{
  display:flex;align-items:center;gap:8px;padding:6px;border:1px solid #edf2f7;border-radius:6px
}
.avatar{
  width:24px;height:24px;border-radius:50%;background:var(--blue-light);
  display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:700;font-size:12px
}
.user-name{font-weight:700;color:#2d3748}
.user-status{font-size:12px;color:var(--muted)}

@media (max-width:1100px){
  .layout{grid-template-columns:220px 1fr 220px}
  .video-card{width:200px}
  .remote-grid{margin-left:220px}
}