:root{--accent: #d9ebff;--my-bubble: #d9ebff;--other-bubble: #eef1f4;--text-main: #333333;--text-sub: #94a3b8;--border-color: #e2e8f0;--card-bg: #ffffff}html,body{height:100%;margin:0;padding:0;overflow:hidden;background:#fff;font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;min-width:0}body{display:flex;flex-direction:column}.header{background:#fff;padding:8px 10px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;z-index:20;min-width:0}.header-left{display:flex;align-items:center;gap:5px;min-width:0;flex:1}.home-btn{text-decoration:none;color:var(--text-sub);font-size:.7rem;padding:3px 6px;border:1px solid var(--border-color);border-radius:4px;flex-shrink:0}.header-title{font-weight:600;font-size:.8rem;color:#555;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}#tool-container{display:none;width:100%;height:45vh;border-bottom:2px solid var(--border-color);background:#fff;z-index:10}#tool-frame{width:100%;height:100%;border:none}#chat-window{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:12px;min-width:0}.tool-menu-container{display:none;position:absolute;bottom:45px;background:#fff;border:1px solid var(--border-color);border-radius:8px;padding:6px;box-shadow:0 4px 12px #0000001a;z-index:110;flex-direction:row;gap:8px;width:max-content}.tool-menu-container .tool-item{display:flex;align-items:center;justify-content:center;padding:8px;cursor:pointer;font-size:1.4rem;border-radius:6px;transition:background .2s}.tool-menu-container .tool-item:hover{background:#f1f5f9}.msg{max-width:85%;display:flex;flex-direction:column;min-width:0}.bubble{padding:8px 12px;border-radius:8px;font-size:.8rem;line-height:1.5;word-break:break-word;box-shadow:0 1px 2px #0000000d}.user-name{font-size:.65rem;color:var(--text-sub);margin-bottom:4px;margin-left:4px}.msg.me{align-self:flex-end}.msg.me .bubble{background:var(--my-bubble);color:#2c3e50;border:1px solid #c9def5}.msg.other{align-self:flex-start}.msg.other .bubble{background:var(--other-bubble);border:1px solid #e2e5e8}.system-msg{align-self:center;color:var(--text-sub);font-size:.62rem;padding:8px 0;text-align:center}.date-divider{align-self:center;display:flex;align-items:center;width:100%;margin:16px 0 12px}.date-divider:before,.date-divider:after{content:"";flex:1;border-bottom:1px solid var(--border-color)}.date-divider span{padding:0 12px;color:var(--text-sub);font-size:.7rem;font-weight:600;white-space:nowrap}.msg-time{font-size:.65rem;color:var(--text-sub);margin:0 5px;align-self:flex-end;white-space:nowrap}.file-card{margin-top:8px;border:1px solid rgba(0,0,0,.08);border-radius:8px;overflow:hidden;background:var(--card-bg);display:flex;align-items:center;padding:10px;min-width:220px;max-width:280px;transition:all .2s}.me .file-card{border-color:#0000000d}.file-card.doc-type:hover{background:#fcfcfc;border-color:var(--accent)}.file-card.image-type{display:block;padding:0;border:none;background:transparent}.chat-img{max-width:100%;border-radius:8px;cursor:zoom-in;border:1px solid rgba(0,0,0,.1);display:block}.file-info-bar{font-size:.65rem;color:var(--text-sub);padding:4px 2px}.file-icon{font-size:1.4rem;margin-right:12px}.file-details{flex:1;overflow:hidden;margin-right:8px}.file-name{font-size:.75rem;font-weight:600;color:var(--text-main);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-meta{font-size:.65rem;color:var(--text-sub);margin-top:2px}.file-download-btn{color:var(--text-sub);display:flex;align-items:center;padding:6px;border-radius:6px;transition:all .2s;text-decoration:none}.file-download-btn:hover{background:#f1f5f9;color:var(--accent)}#input-area{background:#fff;padding:8px;border-top:1px solid var(--border-color);padding-bottom:env(safe-area-inset-bottom,8px);min-width:0;margin-bottom:8px}.input-wrapper{position:relative;display:flex;gap:4px;align-items:center;min-width:0}#message{flex:1;min-width:0;width:1%;padding:8px 10px;border:1px solid var(--border-color);border-radius:6px;font-size:14px;outline:none;resize:none;height:38px;min-height:38px;max-height:120px;line-height:1.4;overflow-y:hidden;box-sizing:border-box}#message:focus{border-color:var(--accent)}#message.drag-over{border:2px dashed var(--accent)!important;background-color:#eff6ff!important}#send-btn{padding:6px 12px;background:#f1f5f9;color:#64748b;border:1px solid var(--border-color);border-radius:6px;font-size:.75rem;font-weight:600;flex-shrink:0;white-space:nowrap;cursor:pointer;transition:all .2s}#send-btn:hover{background:var(--accent);color:#fff}.tool-btn{background:none;border:none;font-size:1.1rem;cursor:pointer;filter:grayscale(100%);opacity:.4;flex-shrink:0;transition:all .2s ease;padding:4px;border-radius:4px}.tool-btn:hover{filter:grayscale(0%);opacity:1;background-color:#f1f5f9;transform:scale(1.1)}.tool-btn.active{filter:grayscale(0%);opacity:1;background-color:#e2e8f0}#tool-select-menu{display:none;position:absolute;bottom:45px;left:35px;background:#fff;border:1px solid var(--border-color);border-radius:8px;padding:6px;box-shadow:0 4px 12px #0000001a;z-index:110;flex-direction:row;gap:8px;width:auto}.tool-item{position:relative;cursor:pointer;font-size:1.4rem;padding:6px;border-radius:6px;transition:all .2s;display:flex;align-items:center;justify-content:center}.tool-item:hover{background:#f1f5f9}.emoji-picker{position:absolute;bottom:45px;left:0;background:#fff;border:1px solid var(--border-color);border-radius:8px;padding:8px;display:none;grid-template-columns:repeat(5,1fr);gap:6px;box-shadow:0 4px 12px #0000001a;z-index:100}.emoji-item{cursor:pointer;font-size:1.5rem;padding:4px;border-radius:4px;transition:all .2s}.emoji-item:hover{background:#f1f5f9;transform:scale(1.2)}#nickname-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#f1f5f9;display:flex;align-items:center;justify-content:center;z-index:1000}.popup{background:#fff;padding:25px;border-radius:8px;text-align:center;width:280px;box-shadow:0 4px 6px -1px #0000001a;border:1px solid #e2e8f0}.popup h2{margin:0 0 16px;color:var(--text-main);font-size:1.2rem}.popup input{width:100%;padding:10px;margin:12px 0;border:1px solid var(--border-color);border-radius:4px;box-sizing:border-box;font-size:14px}.popup input:focus{outline:none;border-color:var(--accent)}.popup button{width:100%;padding:10px;background:var(--accent);color:#fff;border:none;border-radius:4px;font-weight:700;cursor:pointer;transition:all .2s}.popup button:hover{background:#1d4ed8}.unread-count{cursor:help;position:relative;-webkit-user-select:none;user-select:none}.unread-count:hover:after{content:attr(data-readers);position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:#000c;color:#fff;padding:4px 8px;border-radius:4px;font-size:10px;white-space:nowrap;z-index:100;margin-bottom:4px}.error-toast{position:fixed;top:20px;left:50%;transform:translate(-50%);background:#ef4444;color:#fff;padding:12px 20px;border-radius:8px;box-shadow:0 4px 12px #0003;z-index:2000;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}body.not-joined .header,body.not-joined #chat-window,body.not-joined #input-area{display:none!important}body.not-joined #nickname-overlay{display:flex!important}