body.mode-stealth{background:var(--bg);color:var(--text)}body.mode-stealth.stealth-theme-dark{--bg: #0f0f0f;--surface: #1a1a1a;--surface-hover: #2a2a2a;--border: #2f2f2f;--text: #f5f5f5;--muted: #a0a0a0;--primary: #3b82f6;--primary-hover: #2563eb;--user-bubble: #1f6feb;--user-bubble-text: #ffffff;--assistant-bubble: #2a2a2a;--assistant-bubble-text: #f5f5f5;--shadow: 0 4px 24px rgba(0, 0, 0, .4)}body.mode-stealth.stealth-theme-light{--bg: #ffffff;--surface: #f7f7f8;--surface-hover: #ececf1;--border: #e5e5e5;--text: #1a1a1a;--muted: #6e6e80;--primary: #3b82f6;--primary-hover: #2563eb;--user-bubble: #3b82f6;--user-bubble-text: #ffffff;--assistant-bubble: #f7f7f8;--assistant-bubble-text: #1a1a1a;--shadow: 0 4px 24px rgba(0, 0, 0, .08)}.stealth-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0}.stealth-logo{font-size:1.125rem;font-weight:600;color:var(--text)}.stealth-model-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:.875rem;cursor:pointer}.stealth-model-btn:hover{background:var(--surface-hover)}.stealth-model-arrow{font-size:.625rem;color:var(--muted)}.stealth-main{flex:1;min-height:0;overflow-y:auto;padding:24px 16px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}body.mode-stealth.stealth-theme-light .stealth-main{scrollbar-color:rgba(0,0,0,.25) transparent}.stealth-main::-webkit-scrollbar{width:6px}.stealth-main::-webkit-scrollbar-track{background:transparent}.stealth-main::-webkit-scrollbar-thumb{background:#fff3;border-radius:3px}.stealth-main::-webkit-scrollbar-thumb:hover{background:#ffffff59}body.mode-stealth.stealth-theme-light 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