:root{
  --bg:#ffffff; --bg2:#f5f7fb; --card:#ffffff; --border:#e4e7ee;
  --accent:#2a98e2; --me:#d1ecff; --text:#111827; --muted:#6b7280;
}
*{box-sizing:border-box}
html,body{height:100%}
body.tg{margin:0;background:var(--bg2);color:var(--text);font-family:Inter,Vazirmatn,IRANSans,Segoe UI,Arial}
.tg-container{display:grid;grid-template-columns:320px 1fr;height:100vh}
.tg-sidebar{border-left:1px solid var(--border);background:var(--card);display:flex;flex-direction:column}
.tg-sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:12px;border-bottom:1px solid var(--border)}
.brand{font-weight:700}.actions{position:relative}.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:6px 10px;cursor:pointer}
.menu{position:absolute;right:0;top:36px;background:var(--card);border:1px solid var(--border);border-radius:10px;display:flex;flex-direction:column;min-width:160px;z-index:10}
.menu button{background:transparent;border:0;color:var(--text);padding:10px 12px;text-align:right;cursor:pointer}.menu button:hover{background:#eef2f7}.hidden{display:none}
.me{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border)}.mini{padding:6px 10px;border:1px solid var(--border);background:transparent;color:var(--text);border-radius:8px;cursor:pointer}
.search-wrap{padding:10px 12px;border-bottom:1px solid var(--border)}.search-wrap input{width:100%;padding:10px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--text)}
.chat-list{overflow:auto;background:#fff}.chat-item{display:flex;gap:10px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--border);cursor:pointer}.chat-item:hover{background:#f7f9fc}.chat-item.active{background:#eef6ff}
.chat-item .title{font-weight:600}.chat-item .subtitle{color:var(--muted);font-size:12px}
.tg-main{display:flex;flex-direction:column;height:100vh;border-right:1px solid var(--border);background:#eaeff5}
.tg-header{display:flex;align-items:center;gap:12px;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--border);background:var(--card);flex-shrink:0}
.tg-header .title{font-weight:600}.typing{font-size:12px;color:var(--muted)}.profile-btn{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:10px;padding:6px 10px;cursor:pointer}
.tg-messages{flex:1;overflow-y:auto;padding:16px;background:#eaeff5}
.msg{max-width:70%;padding:10px 12px;border-radius:14px;border:1px solid var(--border);background:#fff;margin:8px 0;white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;position:relative}
.msg.me{margin-left:auto;background:var(--me);border-color:#b4dbff}.msg .meta{font-size:11px;color:var(--muted);margin-top:6px}.msg .file{display:block;margin-top:6px;color:var(--accent)}.msg .ticks{position:absolute;bottom:6px;left:10px;font-size:12px;color:var(--muted)}
.tg-send{display:flex;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--card);flex-shrink:0}
.tg-send input#msg{flex:1;padding:10px;border-radius:20px;border:1px solid var(--border);background:#fff;color:var(--text)}
.send-btn{background:var(--accent);border:0;color:#fff;border-radius:20px;padding:8px 16px;cursor:pointer}.attach{border-radius:20px}
.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);align-items:center;justify-content:center;z-index:1000}.modal.show{display:flex}
.modal-box{background:#fff;border:1px solid var(--border);border-radius:12px;min-width:320px;max-width:90vw;padding:14px}.modal-actions{display:flex;justify-content:flex-end;margin-top:12px}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
@media (max-width: 900px){.tg-container{grid-template-columns:1fr}.tg-sidebar{display:none}}