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:root{--bg:#fafaf8;--bg-secondary:#f0efed;--surface:#fff;--text:#1a1a18;--text-secondary:#6b6b65;--text-muted:#a0a098;--border:#e5e5e0;--border-hover:#d0d0ca;--primary:#4a7c6f;--primary-hover:#3d6a5e;--primary-subtle:#eef5f2}.dark{--bg:#111110;--bg-secondary:#1a1a18;--surface:#222220;--text:#e8e8e4;--text-secondary:#9a9a92;--text-muted:#5a5a55;--border:#2a2a28;--border-hover:#3a3a35;--primary:#6aac9a;--primary-hover:#7ec0ae;--primary-subtle:#1a2a24}.kath-bubble-user{background:var(--primary);color:#fff;word-break:break-word;border-radius:20px 20px 4px;max-width:80%;margin-left:auto;padding:12px 16px;font-size:14px;line-height:1.5}.kath-bubble-ai{background:var(--surface);border:1px solid var(--border);color:var(--text);word-break:break-word;border-radius:20px 20px 20px 4px;max-width:85%;padding:12px 16px;font-size:14px;line-height:1.6}.kath-bubble-ai code{background:var(--bg-secondary);border-radius:4px;padding:2px 5px;font-family:SF Mono,Fira Code,monospace;font-size:12px}.kath-bubble-ai pre{background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;margin:8px 0;padding:12px;font-family:SF Mono,Fira Code,monospace;font-size:12px;line-height:1.5;overflow-x:auto}@keyframes kath-typing{0%,60%,to{opacity:.3}30%{opacity:1}}.kath-typing-dot{background:var(--text-muted);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite kath-typing}.kath-typing-dot:nth-child(2){animation-delay:.2s}.kath-typing-dot:nth-child(3){animation-delay:.4s}.kath-progress{background:var(--border);border-radius:2px;height:3px;overflow:hidden}.kath-progress-fill{background:var(--primary);border-radius:2px;height:100%;transition:width .3s}.kath-scroll::-webkit-scrollbar{width:6px}.kath-scroll::-webkit-scrollbar-track{background:0 0}.kath-scroll::-webkit-scrollbar-thumb{background:var(--border-hover);border-radius:3px}.kath-scroll::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.kath-scroll{scrollbar-width:thin;scrollbar-color:var(--border-hover) transparent}.kath-bubble-ai p{margin:.4em 0}.kath-bubble-ai p:first-child{margin-top:0}.kath-bubble-ai p:last-child{margin-bottom:0}.kath-bubble-ai strong{color:var(--text);font-weight:600}.kath-bubble-ai em{font-style:italic}.kath-bubble-ai ul,.kath-bubble-ai ol{margin:.4em 0;padding-left:1.5em;list-style-position:outside}.kath-bubble-ai ul{list-style-type:disc}.kath-bubble-ai ol{list-style-type:decimal}.kath-bubble-ai li{margin:.15em 0}.kath-bubble-ai h1,.kath-bubble-ai h2,.kath-bubble-ai h3{color:var(--text);margin:.6em 0 .3em;font-weight:600}.kath-bubble-ai h1{font-size:1.1em}.kath-bubble-ai h2{font-size:1.05em}.kath-bubble-ai h3{font-size:1em}.kath-bubble-ai blockquote{border-left:3px solid var(--primary);color:var(--text-secondary);margin:.4em 0;padding-left:10px}.kath-bubble-ai a{color:var(--primary);text-underline-offset:2px;text-decoration:underline}.kath-settings-overlay{z-index:50;background:#0006;position:fixed;inset:0}.kath-settings-panel{background:var(--bg);border-left:1px solid var(--border);z-index:51;width:320px;max-width:90vw;padding:24px;position:fixed;top:0;bottom:0;right:0;overflow-y:auto}