:root{--yellow: #ffd90f;--yellow-dark: #e6b800;--bg: #0e0e0e;--surface: #1a1a1a;--bubble-user: #ffd90f;--bubble-user-text: #1a1a1a;--bubble-karl: #222222;--text: #f2f2f2;--muted: #9a9a9a;--border: #2a2a2a;--danger: #e5484d}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.login{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.login h1{margin:4px 0 0;font-size:28px}.logo{display:flex;align-items:center;justify-content:center;background:var(--yellow);color:var(--bubble-user-text);font-weight:900;border-radius:16px}.logo.lg{width:72px;height:72px;font-size:44px}.logo.sm{width:32px;height:32px;font-size:20px;border-radius:9px}.muted{color:var(--muted)}.error{color:var(--danger)}.app{height:100%;max-width:820px;margin:0 auto;display:flex;flex-direction:column}.header{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--surface);border-bottom:1px solid var(--border)}.header strong{font-size:18px}.spacer{flex:1}.link{background:none;border:none;color:var(--text);font-size:14px;font-weight:600;cursor:pointer;padding:6px 8px}.link:hover{color:var(--yellow)}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.empty{color:var(--muted);text-align:center;margin-top:40px}.msg{display:flex;flex-direction:column;max-width:85%}.msg.user{align-self:flex-end;align-items:flex-end}.msg.karl{align-self:flex-start}.bubble{padding:10px 14px;border-radius:16px;line-height:1.45;word-wrap:break-word;overflow-wrap:anywhere}.msg.user .bubble{background:var(--bubble-user);color:var(--bubble-user-text)}.msg.karl .bubble{background:var(--bubble-karl);color:var(--text)}.bubble .pre{white-space:pre-wrap}.bubble p{margin:0 0 8px}.bubble p:last-child{margin-bottom:0}.bubble pre{background:#000;padding:10px;border-radius:8px;overflow-x:auto}.bubble code{font-family:ui-monospace,Menlo,monospace;font-size:.92em}.bubble a{color:var(--yellow-dark)}.tools{color:var(--muted);font-size:12px;margin-top:4px}.thinking{color:var(--muted);font-style:italic}.divider{display:flex;align-items:center;text-align:center;color:var(--muted);font-size:12px}.divider:before,.divider:after{content:"";flex:1;border-bottom:1px solid var(--border)}.divider span{padding:0 10px}.pending{margin:0 14px 10px;padding:14px;border-radius:14px;background:var(--surface);border:1px solid var(--yellow-dark)}.pending code{display:block;font-family:ui-monospace,Menlo,monospace;margin:8px 0;white-space:pre-wrap}.row{display:flex;gap:10px;justify-content:flex-end}.btn{padding:8px 20px;border-radius:10px;border:none;font-weight:700;cursor:pointer}.btn.ghost{background:var(--bubble-karl);color:var(--text)}.btn.yellow{background:var(--yellow);color:var(--bubble-user-text)}.inputbar{display:flex;align-items:flex-end;gap:8px;padding:10px 14px;background:var(--surface);border-top:1px solid var(--border)}.inputbar textarea{flex:1;resize:none;max-height:160px;background:var(--bubble-karl);color:var(--text);border:none;border-radius:18px;padding:10px 14px;font-size:16px;font-family:inherit;line-height:1.4}.inputbar textarea:focus{outline:1px solid var(--yellow-dark)}.icon{width:42px;height:42px;border-radius:50%;border:none;font-size:18px;cursor:pointer;flex-shrink:0}.icon.ghost{background:var(--bubble-karl);color:var(--text)}.icon.yellow{background:var(--yellow);color:var(--bubble-user-text)}.icon.danger{background:var(--danger);color:#fff}.icon:disabled{opacity:.45;cursor:default}