:root{--bg:#efeae2;--header:#075e54;--header-text:#fff;--bubble-in:#fff;--bubble-out:#d9fdd3;--text:#111b21;--muted:#667781;--accent:#00a884;--input-bg:#f0f2f5;--field:#fff;--notice:#fff3c4}@media (prefers-color-scheme:dark){:root{--bg:#0b141a;--header:#202c33;--header-text:#e9edef;--bubble-in:#202c33;--bubble-out:#005c4b;--text:#e9edef;--muted:#8696a0;--accent:#00a884;--input-bg:#202c33;--field:#2a3942;--notice:#3b3418}}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,Tahoma,Noto Sans Arabic,sans-serif}.app{background:var(--bg);flex-direction:column;max-width:720px;height:100dvh;margin:0 auto;display:flex}.header{background:var(--header);color:var(--header-text);align-items:center;gap:12px;padding:10px 16px;display:flex}.avatar{background:var(--accent);border-radius:50%;flex-shrink:0;place-items:center;width:40px;height:40px;font-size:20px;display:grid}.header-text{flex:1;min-width:0}.header-title{white-space:nowrap;text-overflow:ellipsis;font-size:16px;font-weight:600;overflow:hidden}.header-sub{opacity:.8;font-size:12px}.reset{color:inherit;font:inherit;cursor:pointer;background:0 0;border:1px solid;border-radius:16px;padding:6px 12px;font-size:13px}.notice{background:var(--notice);color:var(--text);text-align:center;padding:6px 16px;font-size:12px}.messages{flex-direction:column;flex:1;gap:6px;padding:12px 16px;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:10px;max-width:82%;padding:8px 12px;font-size:15px;line-height:1.6;box-shadow:0 1px .5px #00000021}.bubble.user{background:var(--bubble-out);align-self:flex-end}.bubble.bot{background:var(--bubble-in);align-self:flex-start}.bubble a{color:var(--accent)}.typing{color:var(--muted);align-self:flex-start;padding:4px 8px;font-size:13px}.handoff{background:var(--notice);border-radius:8px;align-self:center;padding:4px 10px;font-size:12px}.chips{flex-wrap:wrap;gap:8px;padding:0 16px 8px;display:flex}.chip{background:var(--field);color:var(--accent);border:1px solid var(--accent);font:inherit;cursor:pointer;border-radius:16px;padding:6px 12px;font-size:13px}.composer{padding:8px 16px calc(8px + env(safe-area-inset-bottom));background:var(--input-bg);gap:8px;display:flex}.composer textarea{resize:none;font:inherit;background:var(--field);color:var(--text);border:none;border-radius:20px;outline:none;flex:1;max-height:120px;padding:10px 14px;font-size:15px}.send{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;width:44px;height:44px;font-size:18px}.send:disabled{opacity:.5;cursor:default}.send span{display:inline-block;transform:scaleX(-1)}