.live-chat{overflow:hidden;min-width:0;margin-top:20px}.chat-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}.chat-head h2{font-size:18px;margin:0 0 5px}.chat-head small,.chat-demo,.chat-identity,.chat-send small{color:var(--muted);font-size:13px}.chat-demo{padding:0 20px}.chat-mode{display:flex;align-items:center;gap:12px;padding:0 20px 14px;font-size:14px}.chat-mode select{flex:1;min-width:0}.chat-messages{height:320px;overflow:auto;padding:16px;overscroll-behavior:auto}.chat-message{padding:12px;margin-bottom:12px;border-radius:14px;background:var(--bg);border:1px solid var(--line)}.chat-message.own{border-color:#777ce5}.chat-message header{display:flex;justify-content:space-between;gap:12px;font-size:14px}.chat-message header span{font-size:12px;color:var(--muted)}.chat-message time{font-size:12px;color:var(--muted)}.chat-message p,.chat-pin p{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.5;font-size:15px;margin:10px 0}.chat-actions{display:flex;gap:5px;flex-wrap:wrap}.chat-actions button,.chat-emoji{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:8px;padding:6px 9px;cursor:pointer}.chat-compose{padding:16px;border-top:1px solid var(--line)}.chat-compose textarea{width:100%;resize:vertical;margin:9px 0;min-height:80px;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit}.chat-emojis{display:flex;gap:5px;flex-wrap:wrap}.chat-emoji{font-size:20px}.chat-send{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px}.chat-send small{max-width:210px}.chat-status{padding:0 20px;font-size:14px;color:var(--muted)}.chat-pin{padding:12px 20px;background:var(--bg);border-bottom:1px solid var(--line)}.chat-empty{text-align:center;padding:50px 10px;color:var(--muted)}.chat-window{max-width:760px;margin:auto;padding:18px}.chat-window h1{font-size:22px}.chat-window .chat-messages{height:calc(100dvh - 430px);min-height:180px}.chat-window .live-chat{margin-top:12px}.live-chat [hidden]{display:none!important}@media(min-width:1100px){.lesson-layout:has(.live-chat){grid-template-columns:minmax(0,1.6fr) minmax(330px,1fr)}.lesson-layout:has(.live-chat) .lesson-aside{align-self:start}.lesson-layout:has(.live-chat) .live-chat{margin-top:0}}@media(max-width:600px){.chat-send small{display:none}.chat-send{justify-content:flex-end}.chat-message p{font-size:16px}}
.chat-mode select{font:inherit;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:9px;padding:9px}.chat-window{padding-top:24px}.chat-window h1{line-height:1.3;overflow-wrap:anywhere}.chat-window .live-chat{box-shadow:none}