:root{
  --bg: #f6f6f7;
  --panel: #ffffff;
  --panel-raised: #f1f1f3;
  --line: #e3e2e4;
  --text: #1c1b1d;
  --muted: #79767a;
  --brand: #c81e35;
  --brand-hover: #a91729;
  --brand-dim: #fbe9ea;
  --amber: #9a6b12;
  --danger: #b5541a;
}
*{box-sizing:border-box; margin:0; padding:0;}
.hidden{ display:none !important; }
html{ overflow-x:hidden; width:100%; }
body{
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  height: 100vh;
  height: 100dvh; /* iOS Safari: tru dung phan thanh dia chi/toolbar dang che, tranh cat mat khung nhap tin nhan */
  overflow: hidden;
  width: 100%;
  max-width: 100vw;
  position: relative;
}
* { max-width: 100%; } /* chan luoi: khong cho bat ky phan tu nao rong hon man hinh gay tran ngang */
img, video, canvas{ max-width:100%; height:auto; }
::selection{ background: var(--brand-dim); }
button{ font-family: inherit; }

/* ---------- Login / register gate ---------- */
#gate{
  position: fixed; inset:0; z-index: 50;
  display:flex; align-items:center; justify-content:center;
  background: linear-gradient(180deg, #fafafa 0%, var(--bg) 100%);
}
.gate-card{
  width: min(400px, 90vw);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: 10px;
  padding: 36px 32px;
  box-shadow: 0 12px 40px rgba(20,20,25,.08);
}
.gate-logo{
  display:block; width:60px; height:auto; margin:0 auto 18px; border-radius:8px;
}
.gate-eyebrow{
  font-family: 'Inter', sans-serif; font-weight:600;
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--brand); margin-bottom: 6px;
}
.gate-card h1{
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px; font-weight: 600; margin-bottom: 4px;
}
.gate-sub{ font-size:12.5px; color: var(--muted); margin-bottom: 16px; }
.field-label{ font-size: 12px; color: var(--muted); margin: 12px 0 6px; display:block; }
.field-optional{ font-size:10.5px; opacity:.75; }
.gate-card input[type=text], .gate-card input[type=password], .gate-card input[type=tel]{
  width:100%; background: var(--panel-raised); border:1px solid var(--line);
  border-radius:8px; padding:11px 12px; color:var(--text); font-size:14px;
  font-family:'Inter',sans-serif; outline:none;
}
.gate-card input:focus{ border-color: var(--brand); }
.gate-btn-row{ display:flex; gap:10px; margin-top:20px; }
.gate-btn-row button{
  flex:1; padding:12px; border:none; border-radius:8px;
  font-weight:600; font-size:13.5px; font-family:'Space Grotesk',sans-serif; cursor:pointer;
}
#login-btn{ background: var(--brand); color:#ffffff; }
#login-btn:hover{ filter: brightness(1.08); }
#register-btn.ghost{ background: var(--panel-raised); color: var(--text); border:1px solid var(--line) !important; }
#register-btn.ghost:hover{ border-color: var(--brand) !important; }
.gate-btn-row button:disabled{ background: var(--line); color: var(--muted); cursor:not-allowed; }
#gate-error{ color: var(--danger); font-size:12px; margin-top:10px; min-height:14px; }
#gate-hint{ color: var(--muted); font-size:11.5px; margin-top:14px; line-height:1.5; }

/* ---------- App shell ---------- */
#app{ display:none; height:100vh; height:100dvh; grid-template-columns: 250px 1fr 300px; grid-template-rows: auto 1fr; overflow:hidden; }
#app.live{ display:grid; }
#app.no-admin{ grid-template-columns: 250px 1fr; }

#topbar{
  grid-column: 1 / -1;
  display:flex; align-items:center; gap:18px; flex-wrap:wrap; row-gap:8px;
  padding: 10px 18px; border-bottom:1px solid var(--line);
  padding-top: max(10px, env(safe-area-inset-top));
  background: var(--panel);
  box-shadow: 0 1px 3px rgba(20,20,25,.05);
  position:relative; z-index:5;
}
.brand{
  font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:15px;
  display:flex; align-items:center; gap:8px;
}
.brand-logo{
  width:24px; height:24px; border-radius:5px; object-fit:cover; flex-shrink:0;
}
.pulse-dot{
  width:8px; height:8px; border-radius:50%; background: var(--brand);
  box-shadow: 0 0 0 0 rgba(200,30,53,.5);
  animation: pulse 1.8s infinite;
}
.pulse-dot.offline{ background: var(--danger); animation:none; }
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(200,30,53,.5); }
  70%{ box-shadow: 0 0 0 8px rgba(200,30,53,0); }
  100%{ box-shadow: 0 0 0 0 rgba(200,30,53,0); }
}
.ticker{
  font-family:'Inter',sans-serif; font-size:11.5px; color: var(--muted);
  display:flex; gap:20px; flex:1; flex-wrap: wrap;
}
.ticker b{ color: var(--text); font-weight:500; }
.role-chip{
  font-family:'Inter',sans-serif; font-size:11px; padding:4px 10px;
  border-radius: 20px; border:1px solid var(--line); color: var(--muted);
}
.role-chip.admin{ color: var(--amber); border-color: #f0d19a; background: #fdf3e0; }
#logout-btn{
  background:none; border:1px solid var(--line); color:var(--muted); border-radius:6px;
  padding:5px 10px; font-size:11.5px; cursor:pointer;
}
#logout-btn:hover{ border-color: var(--danger); color: var(--danger); }
#global-search-btn{
  background: var(--panel-raised); border:1px solid var(--line); color:var(--text); border-radius:6px;
  padding:5px 12px; font-size:11.5px; cursor:pointer; font-family:'Inter',sans-serif;
}
#global-search-btn:hover{ border-color: var(--brand); }
#notif-btn{
  background: var(--panel-raised); border:1px solid var(--line); color:var(--muted); border-radius:6px;
  padding:5px 12px; font-size:11.5px; cursor:pointer; font-family:'Inter',sans-serif;
}
#notif-btn:hover{ border-color: var(--brand); }
#notif-btn.active{ color: var(--brand); border-color: var(--brand); background: var(--brand-dim); }

.unread-badge{
  display:inline-flex; align-items:center; justify-content:center; min-width:17px; height:17px;
  padding:0 5px; border-radius:9px; background: var(--brand); color:#fff; font-size:10px; font-weight:600;
  font-family:'Inter',sans-serif; flex-shrink:0;
}

.avatar{
  width:22px; height:22px; border-radius:50%; object-fit:cover; flex-shrink:0;
  border:1px solid var(--line); background: var(--panel-raised); vertical-align:middle;
}
.avatar.sm{ width:18px; height:18px; }
.avatar.lg{ width:36px; height:36px; }
#avatar-btn{
  background:none; border:none; padding:0; cursor:pointer; border-radius:50%; line-height:0;
}
.topbar-avatar{
  width:28px; height:28px; border-radius:50%; object-fit:cover; border:2px solid var(--brand);
}
#avatar-btn:hover .topbar-avatar{ filter: brightness(.92); }
.my-account{
  display:flex; align-items:center; gap:8px; flex-shrink:0;
}
.my-account-name{
  font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:13px; color: var(--text);
  max-width:160px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
#edit-name-btn{
  background:none; border:1px solid var(--line); color:var(--muted); border-radius:5px;
  width:22px; height:22px; font-size:12px; cursor:pointer; flex-shrink:0;
}
#edit-name-btn:hover{ border-color: var(--brand); color: var(--brand); }
#change-pass-btn{
  background:none; border:1px solid var(--line); color:var(--muted); border-radius:5px;
  width:22px; height:22px; font-size:11px; cursor:pointer; flex-shrink:0;
}
#change-pass-btn:hover{ border-color: var(--brand); color: var(--brand); }

#typing-indicator{
  padding:2px 22px; font-size:11.5px; color: var(--muted); font-style:italic; min-height:16px;
}
#typing-indicator.hidden{ display:none; }

#reply-bar{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding:8px 18px; background: var(--panel-raised); border-top:1px solid var(--line);
  font-size:12.5px; color: var(--text);
}
#reply-bar.hidden{ display:none; }
#reply-bar-text{ overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
#reply-bar-text b{ color: var(--brand); }
#reply-cancel-btn{
  background:none; border:none; color:var(--muted); cursor:pointer; font-size:13px; flex-shrink:0;
}
#reply-cancel-btn:hover{ color: var(--danger); }

.reply-quote{
  font-size:11.5px; color: var(--muted); border-left:2px solid var(--brand); padding:2px 8px;
  margin-bottom:4px; cursor:pointer; background: var(--panel-raised); border-radius:0 6px 6px 0;
}
.reply-quote b{ color: var(--brand); }

.mention{ color: var(--brand); font-weight:600; background: var(--brand-dim); border-radius:4px; padding:0 3px; }

.msg-reactions{ display:flex; flex-wrap:wrap; gap:5px; margin-top:5px; }
.reaction-chip{
  display:inline-flex; align-items:center; gap:4px; background: var(--panel-raised); border:1px solid var(--line);
  border-radius:12px; padding:1px 8px; font-size:11.5px; cursor:pointer;
}
.reaction-chip:hover{ border-color: var(--brand); }
.reaction-chip.mine{ border-color: var(--brand); background: var(--brand-dim); }
.msg-hover-actions{
  display:flex; gap:4px; margin-top:4px; flex-wrap:wrap;
}
.react-btn, .reply-btn{
  background: var(--panel); border:1px solid var(--line); border-radius:6px; padding:1px 7px;
  font-size:11px; cursor:pointer; color: var(--muted);
}
.react-btn:hover, .reply-btn:hover{ border-color: var(--brand); color: var(--brand); }
.emoji-picker{
  position:absolute; display:flex; gap:3px; background: var(--panel); border:1px solid var(--brand);
  border-radius:10px; padding:5px 7px; box-shadow:0 4px 14px rgba(0,0,0,.12); z-index:20;
}
.emoji-picker button{
  background:none; border:none; font-size:16px; cursor:pointer; padding:2px 3px; border-radius:5px;
}
.emoji-picker button:hover{ background: var(--panel-raised); }

#call-overlay{
  position:fixed; inset:0; z-index:70; display:flex; align-items:center; justify-content:center;
  background: rgba(20,15,15,.55);
}
#call-overlay.hidden{ display:none; }
.call-modal{
  width:min(360px,90vw); background: var(--panel); border:1px solid var(--line); border-top:3px solid var(--brand); border-radius:14px;
  padding:28px 24px; display:flex; flex-direction:column; align-items:center; gap:6px;
  box-shadow: 0 16px 50px rgba(0,0,0,.3); position:relative; overflow:hidden;
}
.call-peer-avatar{
  width:88px; height:88px; border-radius:50%; object-fit:cover; border:3px solid var(--brand);
  margin-bottom:8px;
}
.call-peer-name{ font-family:'Space Grotesk',sans-serif; font-weight:700; font-size:17px; color: var(--text); }
.call-status-text{ font-size:12.5px; color: var(--muted); margin-bottom:10px; font-family:'Inter',sans-serif; }
#call-remote-video{
  width:100%; max-height:260px; border-radius:12px; background:#000; object-fit:cover; margin-bottom:8px;
}
#call-local-video{
  position:absolute; bottom:86px; right:16px; width:84px; height:64px; border-radius:8px;
  object-fit:cover; background:#000; border:2px solid var(--brand); z-index:2;
}
.call-controls{ display:flex; gap:12px; margin-top:6px; }
.call-controls button{
  width:48px; height:48px; border-radius:50%; border:1px solid var(--line); background: var(--panel-raised);
  font-size:19px; cursor:pointer; display:flex; align-items:center; justify-content:center;
}
.call-controls button:hover{ border-color: var(--brand); }
.call-controls button.active{ background: var(--danger); color:#fff; border-color: var(--danger); }
.call-controls .call-accept{ background: #2fae5b; color:#fff; border-color:#2fae5b; }
.call-controls .call-accept:hover{ filter: brightness(1.08); }
.call-controls .call-reject{ background: var(--danger); color:#fff; border-color: var(--danger); }
.call-controls .call-reject:hover{ filter: brightness(1.08); }

#profile-edit-overlay, #profile-view-overlay, #forward-overlay, #conv-info-overlay{
  position:fixed; inset:0; z-index:65; display:flex; align-items:flex-start; justify-content:center;
  padding-top:6vh; background: rgba(32,26,26,.3); overflow-y:auto;
}
#profile-edit-overlay.hidden, #profile-view-overlay.hidden, #forward-overlay.hidden, #conv-info-overlay.hidden{ display:none; }
.profile-modal{
  width:min(420px,92vw); background: var(--panel); border:1px solid var(--line); border-top:3px solid var(--brand); border-radius:10px;
  overflow:hidden; margin-bottom:6vh; box-shadow: 0 16px 50px rgba(0,0,0,.14);
}
.profile-modal-head{
  display:flex; align-items:center; justify-content:space-between; padding:14px 18px;
  border-bottom:1px solid var(--line); font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:15px;
}
.profile-modal-head button{
  background:none; border:1px solid var(--line); border-radius:6px; width:28px; height:28px;
  color:var(--muted); cursor:pointer;
}
.profile-modal-head button:hover{ border-color: var(--danger); color: var(--danger); }
.profile-modal-body{ padding:16px 18px; }
.profile-modal-body input, .profile-modal-body textarea{
  width:100%; background: var(--panel-raised); border:1px solid var(--line); border-radius:8px;
  padding:9px 11px; color:var(--text); font-size:13.5px; font-family:'Inter',sans-serif; outline:none; resize:vertical;
}
.profile-modal-body input:focus, .profile-modal-body textarea:focus{ border-color: var(--brand); }
.profile-hint{ font-size:11px; color: var(--muted); margin-top:12px; line-height:1.5; }
#profile-save-btn{
  width:calc(100% - 36px); margin:0 18px 18px; padding:11px; border:none; border-radius:8px;
  background: var(--brand); color:#fff; font-weight:600; font-size:13.5px; cursor:pointer;
}
#profile-save-btn:hover{ filter: brightness(1.06); }
.profile-view-row{ display:flex; gap:10px; padding:8px 0; border-bottom:1px dashed var(--line); font-size:13px; }
.profile-view-row:last-child{ border-bottom:none; }
.profile-view-row .pv-label{ color: var(--muted); min-width:90px; flex-shrink:0; }
.profile-view-row .pv-value{ color: var(--text); word-break:break-word; }
.profile-view-empty{ color: var(--muted); font-size:13px; padding:8px 0; }
.info-btn{
  background:none; border:none; color: var(--muted); font-size:12px; cursor:pointer; flex-shrink:0;
  padding:0; margin-left:4px; width:16px; align-self:flex-start;
}
.info-btn:hover{ color: var(--brand); }

#bot-fab{
  position:fixed; bottom: calc(92px + env(safe-area-inset-bottom)); right:18px; z-index:50;
  width:44px; height:44px; border-radius:50%; border:2px solid var(--brand);
  background: var(--panel); cursor:pointer; padding:0;
  box-shadow: 0 4px 14px rgba(200,30,53,.25);
  display:none; align-items:center; justify-content:center;
  transition: transform .15s ease, box-shadow .15s ease;
}
#bot-fab.show{ display:flex; }
#bot-fab:hover{ transform: scale(1.08); box-shadow: 0 6px 18px rgba(200,30,53,.35); }
#bot-fab-logo, .bot-fab-logo{
  width:100%; height:100%; border-radius:50%; object-fit:cover; display:block;
}
.bot-fab-antenna{
  position:absolute; top:-9px; left:50%; transform:translateX(-50%);
  width:2px; height:9px; background: var(--brand);
}
.bot-fab-antenna::after{
  content:''; position:absolute; top:-5px; left:50%; transform:translateX(-50%);
  width:6px; height:6px; border-radius:50%; background: var(--brand);
  box-shadow: 0 0 6px 1px rgba(200,30,53,.6);
  animation: antenna-blink 1.6s ease-in-out infinite;
}
@keyframes antenna-blink{
  0%, 100%{ opacity:1; } 50%{ opacity:.35; }
}
#bot-fab.has-unread::after{
  content:''; position:absolute; top:0; right:0; width:11px; height:11px;
  border-radius:50%; background: var(--danger); border:2px solid #fff;
}
@media (max-width: 640px){
  #bot-fab{ bottom: calc(86px + env(safe-area-inset-bottom)); right:14px; width:42px; height:42px; }
}

#search-overlay{
  position:fixed; inset:0; z-index:60; display:flex; align-items:flex-start; justify-content:center;
  padding-top:8vh; background: rgba(32,26,26,.25);
}
#search-overlay.hidden{ display:none; }
.search-modal{
  width:min(560px,92vw); max-height:76vh; background:var(--panel); border:1px solid var(--line); border-top:3px solid var(--brand);
  border-radius:10px; display:flex; flex-direction:column; overflow:hidden;
  box-shadow: 0 16px 50px rgba(0,0,0,.16);
}
.search-modal-head{ display:flex; align-items:center; gap:8px; padding:14px; border-bottom:1px solid var(--line); }
#global-search-input{
  flex:1; background: var(--panel-raised); border:1px solid var(--line); border-radius:8px;
  padding:10px 12px; color:var(--text); font-size:14px; outline:none;
}
#global-search-input:focus{ border-color: var(--brand); }
#search-close-btn{
  background:none; border:1px solid var(--line); border-radius:6px; width:32px; height:32px;
  color:var(--muted); cursor:pointer; font-size:14px;
}
#search-close-btn:hover{ border-color: var(--danger); color: var(--danger); }
#search-results{ overflow-y:auto; padding:8px 14px 14px; }
.search-result-row{
  padding:10px 12px; border:1px solid var(--line); border-radius:9px; margin-bottom:8px; cursor:pointer;
}
.search-result-row:hover{ border-color: var(--brand); background: var(--panel-raised); }
.sr-top{ display:flex; align-items:center; justify-content:space-between; margin-bottom:3px; }
.sr-source{ font-family:'Inter',sans-serif; font-size:10.5px; color: var(--brand); font-weight:500; }
.sr-time{ font-family:'Inter',sans-serif; font-size:10.5px; color: var(--muted); }
.sr-user{ font-size:12px; color: var(--muted); margin-bottom:3px; }
.sr-snippet{ font-size:13.5px; color: var(--text); line-height:1.5; }
.sr-snippet mark{ background: var(--brand-dim); color: var(--brand); border-radius:3px; padding:0 2px; }

/* Left: channels + users */
#sidebar{ border-right:1px solid var(--line); padding:16px 14px; overflow-y:auto; min-height:0; }
.panel-title{
  font-family:'Inter',sans-serif; font-size:10.5px; letter-spacing:.1em;
  text-transform:uppercase; color: var(--muted); margin-bottom:10px;
  display:flex; align-items:center; justify-content:space-between;
}
.add-chip{
  background:none; border:1px solid var(--line); color:var(--brand); border-radius:5px;
  width:18px; height:18px; font-size:13px; line-height:1; cursor:pointer;
}
.channel-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:7px 9px; border-radius:7px; font-size:13px; margin-bottom:2px; cursor:pointer;
  color: var(--muted);
}
.channel-row:hover{ background: var(--panel-raised); }
.channel-row.active{ background: var(--panel-raised); color: var(--text); }
.ch-row-left{ display:flex; align-items:center; gap:7px; min-width:0; overflow:hidden; }
.channel-row .del-ch{ display:none; color: var(--danger); font-size:11px; background:none; border:none; cursor:pointer; }
.channel-row:hover .del-ch{ display:inline; }

.user-row{
  display:flex; align-items:flex-start; gap:9px; padding:7px 8px; border-radius:7px;
  font-size:12.5px; margin-bottom:2px; cursor:pointer;
}
.user-row:hover{ background: var(--panel-raised); }
.user-row .dot{ width:7px; height:7px; border-radius:50%; background: var(--line); flex-shrink:0; margin-top:6px; }
.user-row .avatar{ margin-top:1px; }
.user-row.online .dot{ background: var(--brand); }
.user-row.banned .dot{ background: var(--danger); }
.user-row.banned{ color: var(--muted); text-decoration: line-through; }
.user-row.me{ background: var(--panel-raised); cursor:default; }
.user-name-wrap{ flex:1; min-width:0; }
.user-name{
  display:block; white-space:normal; word-break:break-word; line-height:1.35;
}
.user-phone{
  font-size:10.5px; color: var(--muted); font-family:'Inter',sans-serif;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap; margin-top:2px;
}
.badge{ font-size:9.5px; font-family:'Inter',sans-serif; color: var(--amber); flex-shrink:0; }

.dm-row{
  padding:7px 9px; border-radius:7px; margin-bottom:2px; cursor:pointer;
}
.dm-row:hover{ background: var(--panel-raised); }
.dm-row.active{ background: var(--panel-raised); }
.dm-row .dm-name{ font-size:13px; color: var(--text); display:flex; align-items:center; gap:6px; min-width:0; }
.dm-row .dm-name span:not(.dot){ min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.dm-row .dm-preview{ font-size:11px; color: var(--muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; margin-top:2px; }
.dm-empty{ font-size:11.5px; color: var(--muted); padding:4px 2px; }

/* Center: chat */
#chat-col{ display:flex; flex-direction:column; min-width:0; min-height:0; overflow:hidden; position:relative; }
#chat-toolbar{
  display:flex; align-items:center; gap:10px; padding:10px 18px; border-bottom:1px solid var(--line);
  flex-wrap:wrap; row-gap:8px;
}
#chat-toolbar .ch-name{ font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:14px; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; max-width:100%; }
#call-audio-btn, #call-video-btn{
  background: var(--panel-raised); border:1px solid var(--line); border-radius:6px;
  padding:5px 10px; font-size:14px; cursor:pointer;
}
#call-audio-btn:hover, #call-video-btn:hover{ border-color: var(--brand); }
#mute-conv-btn, #pin-conv-btn{
  background: var(--panel-raised); border:1px solid var(--line); border-radius:6px;
  padding:5px 9px; font-size:13px; cursor:pointer;
}
#mute-conv-btn:hover, #pin-conv-btn:hover{ border-color: var(--brand); }
#mute-conv-btn.active{ color: var(--danger); border-color: var(--danger); background: #fbeeea; }
#block-user-btn{
  background: var(--panel-raised); border:1px solid var(--line); border-radius:6px;
  padding:5px 9px; font-size:13px; cursor:pointer;
}
#block-user-btn:hover{ border-color: var(--danger); }
#block-user-btn.active{ color:#fff; background: var(--danger); border-color: var(--danger); }
#pin-conv-btn.active{ color: var(--brand); border-color: var(--brand); background: var(--brand-dim); }

#pinned-bar{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding:6px 18px; background: var(--brand-dim); border-bottom:1px solid var(--line);
  font-size:12px; color: var(--brand);
}
#pinned-bar.hidden{ display:none; }
#pinned-bar-toggle{
  background:none; border:1px solid var(--brand); color: var(--brand); border-radius:6px;
  padding:2px 9px; font-size:11px; cursor:pointer;
}
#pinned-bar-list{
  padding:8px 18px; background: var(--panel-raised); border-bottom:1px solid var(--line);
  max-height:180px; overflow-y:auto;
}
#pinned-bar-list.hidden{ display:none; }
.pinned-item{
  display:flex; justify-content:space-between; gap:8px; padding:6px 8px; border-radius:7px;
  background: var(--panel); border:1px solid var(--line); margin-bottom:6px; cursor:pointer; font-size:12px;
}
.pinned-item:hover{ border-color: var(--brand); }
.pinned-item .pi-text{ overflow:hidden; text-overflow:ellipsis; white-space:nowrap; flex:1; }
.pinned-item .pi-unpin{ background:none; border:none; color: var(--muted); cursor:pointer; flex-shrink:0; }
.pinned-item .pi-unpin:hover{ color: var(--danger); }

#voice-recording-bar{
  display:flex; align-items:center; gap:10px; padding:9px 18px; background:#fbeeea;
  border-top:1px solid var(--line); font-size:12.5px;
}
#voice-recording-bar.hidden{ display:none; }
.vr-dot{
  width:9px; height:9px; border-radius:50%; background: var(--danger); flex-shrink:0;
  animation: antenna-blink 1s ease-in-out infinite;
}
.vr-label{ color: var(--muted); flex:1; }
#voice-cancel-btn, #voice-stop-btn{
  border:none; border-radius:7px; padding:6px 12px; font-size:12px; cursor:pointer;
}
#voice-cancel-btn{ background: var(--panel-raised); color: var(--muted); }
#voice-stop-btn{ background: var(--brand); color:#fff; font-weight:600; }
#voice-btn{
  padding:0 14px !important; background: var(--panel-raised) !important; color: var(--text) !important;
  border:1px solid var(--line) !important; font-size:15px; flex-shrink:0;
}
#voice-btn:hover{ border-color: var(--brand) !important; }
#voice-btn:disabled{ opacity:.5; cursor:not-allowed; }
#composer-emoji-btn{
  padding:0 14px !important; background: var(--panel-raised) !important; color: var(--text) !important;
  border:1px solid var(--line) !important; font-size:15px; flex-shrink:0; position:relative;
  border-radius:8px; cursor:pointer;
}
#composer-emoji-btn:hover{ border-color: var(--brand) !important; }
.composer-emoji-picker{
  position:absolute; bottom:100%; left:0; margin-bottom:8px; display:grid;
  grid-template-columns: repeat(6, 1fr); gap:2px; background: var(--panel); border:1px solid var(--brand);
  border-radius:10px; padding:8px; box-shadow:0 8px 24px rgba(0,0,0,.15); z-index:20; width:220px;
}
.composer-emoji-picker button{
  background:none; border:none; font-size:18px; cursor:pointer; padding:4px; border-radius:6px;
}
.composer-emoji-picker button:hover{ background: var(--panel-raised); }

.voice-player{ display:flex; align-items:center; }
.voice-player audio{ height:34px; max-width:220px; }

.msg-fwd-tag{ font-size:10.5px; color: var(--muted); font-style:italic; margin-bottom:3px; }
.forward-item{
  display:flex; align-items:center; gap:8px; padding:9px 10px; border-radius:8px; cursor:pointer;
  border:1px solid var(--line); margin-bottom:6px; font-size:13px;
}
.forward-item:hover{ border-color: var(--brand); background: var(--panel-raised); }

.conv-info-modal{ max-height:84vh; display:flex; flex-direction:column; }
.conv-info-modal .profile-modal-body{ overflow-y:auto; }
.ci-section{ border-bottom:1px solid var(--line); margin:0 -18px; padding:0 18px; }
.ci-section:last-child{ border-bottom:none; }
.ci-section-head{
  width:100%; display:flex; align-items:center; justify-content:space-between;
  background:none; border:none; padding:12px 0; font-size:13.5px; font-weight:600; cursor:pointer; color: var(--text);
}
.ci-caret{ color: var(--muted); transition: transform .15s ease; }
.ci-section-head.open .ci-caret{ transform: rotate(180deg); }
.ci-section-body{ padding-bottom:14px; }
.ci-section-body.hidden{ display:none; }
.ci-empty{ font-size:12px; color: var(--muted); padding:6px 0 12px; }
.ci-image-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap:6px; }
.ci-image-grid a{ display:block; aspect-ratio:1; border-radius:8px; overflow:hidden; border:1px solid var(--line); }
.ci-image-grid img{ width:100%; height:100%; object-fit:cover; display:block; }
.ci-file-row, .ci-link-row{
  display:flex; align-items:center; gap:8px; padding:8px; border-radius:8px; border:1px solid var(--line);
  margin-bottom:6px; font-size:12.5px;
}
.ci-file-row:hover, .ci-link-row:hover{ border-color: var(--brand); background: var(--panel-raised); }
.ci-file-row a, .ci-link-row a{ color: var(--text); text-decoration:none; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; flex:1; }
.ci-file-row a:hover, .ci-link-row a:hover{ color: var(--brand); }
.ci-row-meta{ font-size:10.5px; color: var(--muted); flex-shrink:0; }
#group-manage-btn, #group-leave-btn{
  font-family:'Inter',sans-serif; font-size:11px; padding:5px 10px; border-radius:6px;
  border:1px solid var(--line); background: var(--panel-raised); color: var(--text); cursor:pointer;
}
#group-manage-btn:hover, #group-leave-btn:hover{ border-color: var(--brand); }
#group-leave-btn:hover{ border-color: var(--danger); color: var(--danger); }
#group-manage-panel{
  padding:14px 18px; border-bottom:1px solid var(--line); background: var(--panel-raised);
}
#group-manage-panel.hidden{ display:none; }
.gmp-title{ font-family:'Inter',sans-serif; font-size:10.5px; text-transform:uppercase; letter-spacing:.08em; color: var(--muted); margin-bottom:8px; }
.gmp-hint{ font-size:12px; color: var(--muted); background: var(--panel); border:1px dashed var(--line); border-radius:8px; padding:8px 10px; margin-bottom:8px; }
.gmp-row{
  display:flex; align-items:center; justify-content:space-between; padding:6px 9px;
  background: var(--panel); border:1px solid var(--line); border-radius:7px; margin-bottom:5px; font-size:12.5px;
}
.gmp-row .gmp-name{ display:flex; align-items:center; gap:6px; }
.gmp-row .gmp-actions{ display:flex; gap:5px; }
.gmp-add-row{ display:flex; gap:8px; margin-top:8px; margin-bottom:10px; }
.gmp-add-row input{
  flex:1; background: var(--panel); border:1px solid var(--line); border-radius:7px;
  padding:7px 10px; color:var(--text); font-size:12.5px; outline:none;
}
.gmp-add-row input:focus{ border-color: var(--brand); }
.gmp-add-row button{
  border:none; border-radius:7px; padding:0 14px; background: var(--brand); color:#fff;
  font-weight:600; font-size:12px; cursor:pointer;
}
#gmp-add-suggestions{
  margin-top:-4px; margin-bottom:10px; background: var(--panel); border:1px solid var(--line);
  border-radius:8px; overflow:hidden;
}
.gmp-suggestion{
  display:flex; align-items:center; gap:8px; padding:7px 10px; cursor:pointer; font-size:12.5px;
  border-bottom:1px solid var(--line);
}
.gmp-suggestion:last-child{ border-bottom:none; }
.gmp-suggestion:hover{ background: var(--panel-raised); }
.gmp-suggestion .sg-name{ font-weight:500; }
.gmp-suggestion .sg-id{ color: var(--muted); font-size:11px; }
#search-input{
  margin-left:auto; background: var(--panel-raised); border:1px solid var(--line); border-radius:7px;
  padding:6px 10px; color: var(--text); font-size:12.5px; width:180px; min-width:0; flex:1 1 140px; max-width:220px; outline:none;
}
#search-input:focus{ border-color: var(--brand); }

#messages{ flex:1; min-height:0; overflow-y:auto; padding: 16px 22px; display:flex; flex-direction:column; gap:12px; }
.msg{ max-width: 72%; position:relative; }
.msg-meta{
  font-family:'Inter',sans-serif; font-size:10.5px; color: var(--muted);
  margin-bottom:4px; display:flex; gap:8px; align-items:center;
}
.msg-status{ font-size:10px; cursor:default; font-style:italic; }
.msg-status.sent{ color: var(--muted); }
.msg-status.delivered{ color: var(--muted); }
.msg-status.read{ color: var(--brand); font-weight:600; }
.msg-body{
  background: var(--panel); border:1px solid var(--line); border-radius: 10px;
  padding: 9px 13px; font-size:14px; line-height:1.5; word-wrap:break-word;
}
.msg-body.emoji-only{
  background:none !important; border:none !important; padding:0 !important;
  font-size:46px; line-height:1.15;
}
.msg.mine .msg-body{ background: var(--brand-dim); border-color: #f0b8bd; }
.msg.bot-msg .msg-body{ background: #eef1f7; border-color: #d4dae6; color: #2b3242; }
.msg.bot-msg .msg-meta span:first-child{ color: #4a5578; font-weight:600; }
.removed-body{
  font-style:italic; color: var(--muted); background: var(--panel-raised) !important;
  border-color: var(--line) !important; font-size:13px;
}
.msg-action.recall{ color: var(--amber); }
.msg.mine{ align-self:flex-end; }
.msg-action{
  background:none; border:none; cursor:pointer;
  font-family:'Inter',sans-serif; font-size:10px; opacity:.65; color: var(--muted);
}
.msg-action:hover{ opacity:1; text-decoration:underline; color: var(--text); }
.msg-action.del{ color: var(--danger); }
.edit-row{ display:flex; gap:6px; margin-top:4px; }
.edit-row input{
  flex:1; background: var(--panel-raised); border:1px solid var(--brand); border-radius:6px;
  padding:6px 9px; color:var(--text); font-size:13px; outline:none;
}
.edit-row button{ border:none; border-radius:6px; padding:0 10px; cursor:pointer; font-size:11px; }
.empty-state{ margin:auto; text-align:center; color: var(--muted); font-size:13px; }
.date-divider{
  display:flex; align-items:center; justify-content:center; margin:6px 0 10px; align-self:center;
}
.date-divider span{
  background: var(--panel-raised); color: var(--muted); font-size:11px; font-weight:600;
  padding:4px 12px; border-radius:12px; border:1px solid var(--line);
}
#scroll-bottom-btn{
  position:absolute; bottom:78px; left:50%; transform:translateX(-50%); z-index:10;
  background: var(--panel); border:1px solid var(--brand); color: var(--brand); border-radius:16px;
  padding:6px 14px; font-size:12px; font-weight:600; cursor:pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,.12);
}
#scroll-bottom-btn.hidden{ display:none; }
#scroll-bottom-btn:hover{ background: var(--brand); color:#fff; }

.file-card{
  display:flex; align-items:center; gap:10px; background: var(--panel); border:1px solid var(--line);
  border-radius:10px; padding:9px 13px; text-decoration:none; color: var(--text); max-width:280px;
}
.file-card:hover{ border-color: var(--brand); }
.file-card .fc-icon{ font-size:20px; flex-shrink:0; }
.file-card .fc-info{ min-width:0; }
.file-card .fc-name{ font-size:13px; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:200px; }
.file-card .fc-size{ font-size:11px; color: var(--muted); }
.file-image{ max-width:280px; max-height:280px; border-radius:10px; border:1px solid var(--line); display:block; }

#composer{
  display:flex; gap:10px; padding: 14px 18px; border-top:1px solid var(--line);
  padding-bottom: max(14px, env(safe-area-inset-bottom));
  background: var(--panel);
}
#composer input{
  flex:1; background: var(--panel-raised); border:1px solid var(--line); border-radius:8px;
  padding:11px 14px; color:var(--text); font-size:14px; outline:none; font-family:'Inter',sans-serif;
}
#composer input:focus{ border-color: var(--brand); }
#composer button{
  padding:0 20px; border:none; border-radius:8px; background: var(--brand);
  color:#ffffff; font-weight:600; cursor:pointer; font-family:'Space Grotesk',sans-serif;
  flex-shrink:0;
}
#composer button:disabled{ background: var(--line); color: var(--muted); cursor:not-allowed; }
#attach-btn{
  padding:0 14px !important; background: var(--panel-raised) !important; color: var(--text) !important;
  border:1px solid var(--line) !important; font-size:16px; flex-shrink:0;
}
#attach-btn:hover{ border-color: var(--brand) !important; }
#screenshot-btn{
  padding:0 14px !important; background: var(--panel-raised) !important; color: var(--text) !important;
  border:1px solid var(--line) !important; font-size:15px; flex-shrink:0;
}
#screenshot-btn:hover{ border-color: var(--brand) !important; }
#screenshot-btn:disabled{ opacity:.5; cursor:not-allowed; }

#screenshot-editor-overlay{
  position:fixed; inset:0; z-index:80; display:flex; align-items:center; justify-content:center;
  background: rgba(15,12,12,.72); padding:16px;
}
#screenshot-editor-overlay.hidden{ display:none; }
.screenshot-editor{
  width:min(920px,96vw); max-height:94vh; background: var(--panel); border-radius:12px;
  display:flex; flex-direction:column; overflow:hidden; box-shadow:0 20px 60px rgba(0,0,0,.4);
}
.se-toolbar{
  display:flex; align-items:center; gap:8px; padding:10px 14px; border-bottom:1px solid var(--line);
  flex-wrap:wrap;
}
.se-toolbar button{
  background: var(--panel-raised); border:1px solid var(--line); border-radius:7px;
  padding:7px 12px; font-size:12.5px; cursor:pointer; color: var(--text);
}
.se-toolbar button:hover{ border-color: var(--brand); }
.se-toolbar button.active{ background: var(--brand-dim); border-color: var(--brand); color: var(--brand); font-weight:600; }
.se-spacer{ flex:1; }
.se-cancel{ color: var(--muted); }
.se-cancel:hover{ border-color: var(--danger) !important; color: var(--danger) !important; }
.se-send{ background: var(--brand) !important; color:#fff !important; border-color: var(--brand) !important; font-weight:600; }
.se-send:hover{ filter: brightness(1.08); }
.se-canvas-wrap{
  position:relative; overflow:auto; background:#20211f; display:flex; align-items:center; justify-content:center;
  padding:10px; flex:1; min-height:200px;
}
#se-canvas{ display:block; max-width:100%; max-height:78vh; cursor:crosshair; }
#se-crop-box{
  position:absolute; border:2px dashed #fff; background: rgba(255,255,255,.12);
  box-shadow: 0 0 0 2000px rgba(0,0,0,.35); pointer-events:none;
}
#se-crop-box.hidden{ display:none; }
.se-hint{ padding:8px 14px; font-size:11.5px; color: var(--muted); border-top:1px solid var(--line); }
@media (max-width: 640px){
  .se-toolbar button{ padding:6px 9px; font-size:11.5px; }
  #se-canvas{ max-height:60vh; }
}
#banned-notice{
  display:none; padding:10px 18px; background:#fbeeea; color: var(--danger);
  font-size:12.5px; border-top:1px solid var(--line);
}

/* Right: admin */
#admin-panel{ border-left:1px solid var(--line); padding:16px 14px; overflow-y:auto; min-height:0; }
#admin-panel.hidden{ display:none; }
.stat-grid{ display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:18px; }
.stat-box{ background: var(--panel); border:1px solid var(--line); border-radius:8px; padding:10px 12px; }
.stat-box .num{ font-family:'Space Grotesk',sans-serif; font-size:20px; font-weight:700; color: var(--brand); }
.stat-box .lbl{ font-size:10.5px; color: var(--muted); margin-top:2px; }
.admin-user-row{
  padding:8px; border-radius:7px; background: var(--panel); border:1px solid var(--line);
  margin-bottom:6px; font-size:12px;
}
.admin-user-row .aur-top{ display:flex; align-items:center; justify-content:space-between; margin-bottom:6px; }
.admin-user-row .aur-name{ font-weight:600; display:flex; align-items:center; gap:6px; }
.admin-btn-row{ display:flex; gap:5px; flex-wrap:wrap; }
.admin-btn{
  font-family:'Inter',sans-serif; font-size:10px; border:1px solid var(--line);
  background: var(--panel-raised); color: var(--text); border-radius:6px; padding:4px 7px; cursor:pointer;
}
.admin-btn:hover{ border-color: var(--brand); }
.admin-btn.danger{ color: var(--danger); }
.admin-btn.danger:hover{ border-color: var(--danger); }
.admin-btn.amber{ color: var(--amber); }
.admin-btn.amber:hover{ border-color: var(--amber); }
.admin-actions{ display:flex; flex-direction:column; gap:8px; margin-top: 6px; }
.wide-btn{
  width:100%; padding:9px; border-radius:8px; border:1px solid var(--line);
  background: var(--panel-raised); color: var(--text); font-size:12px; cursor:pointer;
  font-family:'Inter',sans-serif; text-align:left; margin-bottom:8px;
}
.wide-btn:hover{ border-color: var(--brand); }
.wide-btn.danger:hover{ border-color: var(--danger); color: var(--danger); }
.section-gap{ margin-top:20px; }
.audit-row{
  font-family:'Inter',sans-serif; font-size:10.5px; color: var(--muted);
  padding:6px 0; border-bottom:1px dashed var(--line);
}
.audit-row b{ color: var(--text); font-weight:500; }
.deleted-row{
  padding:8px 9px; border-radius:7px; background: var(--panel); border:1px solid var(--line);
  margin-bottom:6px; font-size:11.5px;
}
.deleted-row .dr-top{ display:flex; justify-content:space-between; color: var(--muted); margin-bottom:3px; }
.deleted-row .dr-tag{ font-weight:600; }
.deleted-row .dr-tag.deleted{ color: var(--danger); }
.deleted-row .dr-tag.recalled{ color: var(--amber); }
.deleted-row .dr-text{ color: var(--text); word-break:break-word; }
.folder-group{ margin-bottom:12px; }
.folder-group-title{
  font-size:10.5px; font-weight:600; color: var(--muted); text-transform:uppercase;
  letter-spacing:.04em; margin-bottom:5px; padding-bottom:3px; border-bottom:1px dashed var(--line);
}
.file-row{
  display:flex; justify-content:space-between; align-items:center; gap:6px;
  padding:5px 7px; border-radius:6px; font-size:11.5px; margin-bottom:3px; background: var(--panel);
  border:1px solid var(--line);
}
.file-row a{ color: var(--text); text-decoration:none; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.file-row a:hover{ color: var(--brand); }
.file-row .fr-size{ color: var(--muted); flex-shrink:0; }
.file-row.removed a{ color: var(--muted); text-decoration:line-through; pointer-events:none; }
#import-input{ display:none; }

#toast{
  position:fixed; bottom:18px; left:50%; transform:translateX(-50%);
  background: var(--panel-raised); border:1px solid var(--brand); color:var(--text);
  padding:9px 16px; border-radius:8px; font-size:12.5px; opacity:0; pointer-events:none;
  transition: opacity .25s; z-index:100;
}
#toast.show{ opacity:1; }

::-webkit-scrollbar{ width:8px; }
::-webkit-scrollbar-thumb{ background: var(--line); border-radius:4px; }

#mobile-menu-btn{
  display:none; background: var(--panel-raised); border:1px solid var(--line); color:var(--text);
  border-radius:6px; width:32px; height:32px; font-size:15px; cursor:pointer; flex-shrink:0;
}
#sidebar-backdrop{
  display:none;
}

@media (max-width: 860px){
  #app.live{ grid-template-columns: 1fr; }
  #admin-panel{ display:none; }
  #mobile-menu-btn{ display:block; }

  /* Ep topbar thanh 1 dong duy nhat, cuon ngang - tranh xuong dong nhieu lan chiem het
     chieu cao man hinh va day khung chat bi bop lai gan nhu bien mat */
  #topbar{
    flex-wrap: nowrap; overflow-x: auto; row-gap:0;
    -webkit-overflow-scrolling: touch; scrollbar-width: none;
  }
  #topbar::-webkit-scrollbar{ display:none; }
  #topbar > *{ flex-shrink:0; }
  .ticker{ flex-shrink:0; white-space:nowrap; }

  #sidebar{
    position:fixed; top:0; left:0; bottom:0; width:min(280px,80vw); z-index:55;
    background: var(--panel); box-shadow: 4px 0 20px rgba(0,0,0,.12);
    transform: translateX(-100%); transition: transform .2s ease; display:block;
  }
  #sidebar.open{ transform: translateX(0); }
  #sidebar-backdrop.open{
    display:block; position:fixed; inset:0; z-index:54; background: rgba(32,26,26,.3);
  }

  /* Tin nhan chiem nhieu chieu rong hon tren man hinh hep, de doc hon */
  .msg{ max-width: 86%; }

  /* Ngan iOS Safari tu dong zoom khi bam vao o nhap - moi input/textarea can >=16px */
  #msg-input, #search-input, #global-search-input, #gmp-add-input,
  .profile-modal-body input, .profile-modal-body textarea,
  #username-input, #password-input, #fullname-input{
    font-size:16px;
  }

  /* Vung bam lon hon cho de thao tac bang ngon tay */
  .msg-action{ padding:4px 2px; }
  .react-btn, .reply-btn{ padding:5px 9px; }
  .info-btn{ width:22px; height:22px; }
  #attach-btn, #send-btn{ min-height:40px; }

  /* Thanh cong cu chat: thu gon khoang cach, cho xuong dong tu nhien */
  #chat-toolbar{ padding:8px 12px; gap:6px; }
  #messages{ padding:12px 14px; }
  #composer{ padding:10px 12px; }
  #sidebar{ padding:14px 12px; }

  /* Bang chon emoji: co dinh giua man hinh thay vi bam theo tin nhan,
     tranh bi trang mat vien phai/trai tren man hinh hep */
  .emoji-picker{
    position:fixed; left:50%; bottom:78px; top:auto; right:auto;
    transform:translateX(-50%); box-shadow:0 8px 24px rgba(0,0,0,.2);
  }

  /* Nut noi tro ly ao khong de chan len nut gui tin nhan */
  #bot-fab{ bottom:92px; }
}

@media (max-width: 640px){
  .ticker{ display:none; } /* an bo thong ke it quan trong de nhuong cho cac nut chinh */
  .brand{ font-size:13px; }
  #search-input{ flex-basis:100%; max-width:none; margin-left:0; order:99; }

  /* Rut gon cac nut chu dai trong topbar thanh icon, do chat cho chinh */
  #notif-btn, #global-search-btn{ font-size:0; padding:6px 10px; }
  #notif-btn::before{ content:'🔔'; font-size:14px; }
  #notif-btn.active::before{ content:'🔔'; }
  #global-search-btn::before{ content:'🔍'; font-size:14px; }
  #logout-btn{ font-size:0; padding:6px 8px; }
  #logout-btn::before{ content:'⏻'; font-size:13px; }
  .my-account-name{ max-width:88px; }

  #call-audio-btn, #call-video-btn{ padding:6px 8px; }
  .call-modal{ padding:22px 16px; }
  .call-peer-avatar{ width:72px; height:72px; }
  #call-local-video{ width:64px; height:48px; bottom:74px; right:10px; }

  .profile-modal-body{ padding:14px; }
  #profile-edit-overlay, #profile-view-overlay, #forward-overlay, #conv-info-overlay{ padding-top:3vh; }
  #search-overlay{ padding-top:4vh; }

  /* Khung soan tin co qua nhieu icon (dinh kem/chup man hinh/ghi am/emoji) - thu gon
     lai va dam bao o nhap co the co lai duoc, tranh day nut Gui ra ngoai man hinh */
  #composer{ gap:5px; padding-left:10px; padding-right:10px; }
  #attach-btn, #screenshot-btn, #voice-btn, #composer-emoji-btn{
    padding:0 8px !important; font-size:14px !important; min-width:34px;
  }
  #send-btn{ padding:0 12px; font-size:12.5px; }
  #msg-input{ min-width:0; padding-left:10px; padding-right:10px; }

  /* Bang chon emoji o composer: co dinh giua man hinh thay vi bam theo nut,
     tranh tran ra ngoai mep phai tren man hinh hep */
  .composer-emoji-picker{
    position:fixed; left:50%; bottom:70px; top:auto; margin-bottom:0;
    transform:translateX(-50%); width:min(240px,88vw);
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (max-width: 380px){
  .ch-name{ font-size:13px; }
  .brand{ font-size:0; } /* giu logo, an chu "REDRIVER CHAT" tren man hinh rat hep */
  .brand-logo{ width:26px; height:26px; }
  #role-chip{ display:none; } /* it quan trong nhat, uu tien cho nut chuc nang */
  #composer-emoji-btn{ display:none; } /* nhuong cho o nhap tren man hinh rat hep, van chen emoji duoc bang ban phim */
}