*{box-sizing:border-box}:root{--bg: #f0f2f5;--panel: #ffffff;--text: #17212b;--muted: #707d8d;--accent: #3390ec;--chat-bg: #e7ebf0;--bubble-theirs: #ffffff;--bubble-mine: #eeffde;--border: #e3e8ee}@media(prefers-color-scheme:dark){:root{--bg: #0e1621;--panel: #17212b;--text: #f2f6fa;--muted: #8fa3b3;--chat-bg: #0e1621;--bubble-theirs: #182533;--bubble-mine: #2b5278;--border: #22303d}}html,body,#root{height:100%}body{margin:0;font:16px/1.4 system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:560px;margin:0 auto;height:100%;display:flex;flex-direction:column;background:var(--panel);position:relative}.center{margin:auto;color:var(--muted)}.banner{background:#ffdf6e;color:#4a3b00;padding:8px 14px;font-size:13px}@media(prefers-color-scheme:dark){.banner{background:#55481a;color:#ffdf9e}}.screen{display:flex;flex-direction:column;flex:1;min-height:0}.topbar{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--border)}.topbar-title{display:flex;flex-direction:column;line-height:1.25;min-width:0}.topbar-title span{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.back{background:none;border:0;font-size:22px;color:var(--accent);padding:0 2px;cursor:pointer}.avatar{border-radius:50%;object-fit:cover;flex:none;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;user-select:none}.userlist{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1}.userrow{display:flex;align-items:center;gap:12px;width:100%;padding:10px 14px;background:none;border:0;border-bottom:1px solid var(--border);color:inherit;font:inherit;text-align:left;cursor:pointer}.userrow:hover{background:var(--chat-bg)}.userrow-main{display:flex;flex-direction:column;min-width:0}.userrow-name{font-weight:600}.userrow-sub{font-size:13px;color:var(--muted)}.empty{padding:28px 20px;color:var(--muted);text-align:center;font-size:14px}.chat .messages{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:6px;background:var(--chat-bg)}.bubble{max-width:78%;padding:8px 12px 5px;border-radius:14px}.bubble p{margin:0;white-space:pre-wrap;word-break:break-word}.bubble time{display:block;font-size:11px;color:var(--muted);text-align:right;margin-top:2px}.bubble.mine{align-self:flex-end;background:var(--bubble-mine);border-bottom-right-radius:4px}.bubble.theirs{align-self:flex-start;background:var(--bubble-theirs);border-bottom-left-radius:4px;box-shadow:0 1px 1px #00000014}.msg-media{display:block;max-width:100%;max-height:320px;border-radius:10px;margin-bottom:4px;object-fit:contain;background:#0000000f}.bubble.mine .msg-media{background:#ffffff26}.file-link{display:flex;align-items:center;gap:6px;padding:6px 2px;color:var(--accent);text-decoration:none;font-weight:500;word-break:break-all}.file-link:hover{text-decoration:underline}.file-link-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-link-size{color:var(--muted);font-size:12px;font-weight:400;flex:none}.pending-file{display:flex;align-items:center;gap:10px;margin:8px 12px 0;padding:8px 10px;border:1px solid var(--border);border-radius:12px;background:var(--chat-bg);font-size:14px}.pending-thumb{width:40px;height:40px;border-radius:8px;object-fit:cover;flex:none}.pending-icon{font-size:20px}.pending-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}.pending-size{color:var(--muted);font-size:12px;flex:none}.pending-remove{background:none;border:0;color:var(--muted);font-size:16px;cursor:pointer;padding:4px 6px;flex:none}.pending-remove:hover{color:#c0392b}.composer{display:flex;align-items:center;gap:8px;padding:10px 12px;border-top:1px solid var(--border)}.attach{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:19px;cursor:pointer;flex:none;color:var(--muted);background:var(--chat-bg);user-select:none}.attach:hover{color:var(--accent)}.composer input[type=text],.composer input:not([type]){flex:1;min-width:0;padding:12px 14px;border:1px solid var(--border);border-radius:20px;background:var(--chat-bg);color:var(--text);font:inherit}.composer button{width:42px;height:42px;border-radius:50%;border:0;background:var(--accent);color:#fff;font-size:17px;cursor:pointer;flex:none}.composer button:disabled{opacity:.5}.toast{position:absolute;left:50%;transform:translate(-50%);bottom:84px;background:#c0392b;color:#fff;padding:8px 16px;border-radius:10px;font-size:14px;max-width:90%;z-index:2}button:focus-visible,input:focus-visible,label:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:1px}