:root{--bg: #0b0d12;--surface: #12151c;--surface-raised: #191d26;--surface-elevated: #1f2430;--border: #262b36;--text: #eef0f4;--text-muted: #9aa1b1;--accent: #8c7bff;--accent-strong: #7a5cff;--accent-soft: rgba(140, 123, 255, .14);--accent-contrast: #0b0d12;--teal: #38d7ff;--teal-soft: rgba(56, 215, 255, .14);--danger: #ff6b6b;--focus-ring: var(--accent);--radius-lg: 18px;--radius-md: 12px;--radius-sm: 8px;--shadow-md: 0 8px 24px rgba(0, 0, 0, .35);--glow-violet: 0 0 32px rgba(122, 92, 255, .25);--glow-teal: 0 0 24px rgba(56, 215, 255, .16);--transition-fast: .14s ease;--transition-base: .2s ease;--safe-bottom: env(safe-area-inset-bottom, 0px)}@media (prefers-reduced-motion: reduce){:root{--transition-fast: 0ms;--transition-base: 0ms}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased}button,textarea,input{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.conversation-list,.message-list{scrollbar-width:thin;scrollbar-color:var(--border) transparent}.conversation-list::-webkit-scrollbar,.message-list::-webkit-scrollbar{width:8px}.conversation-list::-webkit-scrollbar-thumb,.message-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px}.conversation-list::-webkit-scrollbar-track,.message-list::-webkit-scrollbar-track{background:transparent}.full-page-loading{height:100%;display:flex;align-items:center;justify-content:center;color:var(--text-muted)}.auth-screen{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(circle at 50% 15%,rgba(122,92,255,.1),transparent 55%),var(--bg)}.auth-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;box-shadow:var(--shadow-md)}.auth-brand{text-align:center;margin-bottom:24px}.auth-mark{width:52px;height:52px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-strong));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px;color:var(--accent-contrast);box-shadow:var(--glow-violet)}.auth-brand h1{font-size:20px;margin:0 0 4px}.auth-tagline{color:var(--text-muted);font-size:14px;margin:0}.auth-form{display:flex;flex-direction:column;gap:14px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-muted)}.field input{background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 12px;color:var(--text);font-size:15px;transition:border-color var(--transition-fast)}.field input:focus{outline:none;border-color:var(--accent)}.auth-error{color:var(--danger);font-size:13px;margin:0}.auth-notice{color:var(--accent);font-size:13px;margin:0}.btn-primary{background:var(--accent);color:var(--accent-contrast);border:none;border-radius:var(--radius-sm);padding:11px 16px;font-weight:600;cursor:pointer;transition:background var(--transition-fast)}.btn-primary:hover:not(:disabled){background:var(--accent-strong)}.btn-primary:disabled{opacity:.6;cursor:default}.btn-block{width:100%}.link-btn{background:none;border:none;color:var(--text-muted);font-size:13px;cursor:pointer;padding:4px 0;text-align:center;width:100%;margin-top:14px;transition:color var(--transition-fast)}.link-btn:hover{color:var(--text)}.auth-divider{display:flex;align-items:center;gap:10px;margin:20px 0 14px;color:var(--text-muted);font-size:12px}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border)}.oauth-row{display:flex;gap:10px}.btn-secondary{flex:1;background:var(--surface-raised);border:1px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:10px;cursor:pointer;transition:border-color var(--transition-fast),background var(--transition-fast)}.btn-secondary:hover{border-color:var(--accent);background:var(--surface-elevated)}.app-shell{height:100%;display:flex}.sidebar{width:288px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px;gap:14px}.sidebar-header{flex-shrink:0;display:flex;flex-direction:column;gap:12px}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:2px 4px}.sidebar-brand-mark{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-strong));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:var(--accent-contrast);flex-shrink:0}.sidebar-brand-name{font-size:13px;font-weight:600;color:var(--text-muted);letter-spacing:.02em}.conversation-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.sidebar-hint{color:var(--text-muted);font-size:13px;padding:8px 4px}.conversation-item{display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:none;border:none;border-left:2px solid transparent;border-radius:var(--radius-sm);padding:9px 12px 9px 10px;text-align:left;cursor:pointer;width:100%;transition:background var(--transition-fast)}.conversation-item:hover{background:var(--surface-raised)}.conversation-item-active{background:var(--accent-soft);border-left-color:var(--accent)}.conversation-title{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;width:100%}.conversation-time{font-size:11px;color:var(--text-muted)}.sidebar-footer{flex-shrink:0;border-top:1px solid var(--border);padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-email{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-scrim{display:none}.chat-pane{flex:1;min-width:0;display:flex;flex-direction:column;height:100%}.chat-header{display:flex;align-items:center;gap:10px;padding:0 20px;height:60px;border-bottom:1px solid var(--border);flex-shrink:0}.chat-header-identity{display:flex;align-items:center;gap:10px;min-width:0}.chat-header-mark{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-strong));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:var(--accent-contrast);box-shadow:var(--glow-violet);flex-shrink:0}.chat-header-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}.chat-header-name{font-weight:600;font-size:14px}.chat-header-sub{font-size:11px;color:var(--text-muted)}.icon-btn{background:none;border:none;font-size:18px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:background var(--transition-fast)}.icon-btn:hover{background:var(--surface-raised)}.sidebar-toggle{display:none}.chat-loading{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-muted)}.chat-column{flex:1;min-height:0;display:flex;flex-direction:column;width:100%;max-width:960px;margin:0 auto;padding:0 24px}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-muted);gap:4px}.empty-mark{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-strong));display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:700;color:var(--accent-contrast);margin-bottom:14px;box-shadow:var(--glow-violet)}.empty-state h2{margin:0;color:var(--text)}.message-list{flex:1;overflow-y:auto;padding:24px 0;display:flex;flex-direction:column;gap:16px}.message-row{display:flex}.message-row-user{justify-content:flex-end}.message-row-assistant{justify-content:flex-start}.message-bubble{max-width:min(640px,85%);padding:10px 14px;border-radius:var(--radius-md);line-height:1.55;font-size:15px;overflow-wrap:anywhere}.message-bubble-user{background:var(--accent);color:var(--accent-contrast);border-bottom-right-radius:4px}.message-bubble-assistant{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.message-bubble p{margin:0 0 8px}.message-bubble p:last-child{margin-bottom:0}.message-bubble ul,.message-bubble ol{margin:6px 0;padding-left:22px}.message-bubble li{margin:2px 0}.message-bubble h1,.message-bubble h2,.message-bubble h3{line-height:1.3;margin:12px 0 6px}.message-bubble h1:first-child,.message-bubble h2:first-child,.message-bubble h3:first-child{margin-top:0}.message-bubble a{color:inherit;text-decoration:underline;text-underline-offset:2px}.message-bubble-assistant a{color:var(--accent)}.message-bubble :not(pre)>code{background:var(--surface-elevated);border-radius:4px;padding:2px 5px;font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.message-bubble-user :not(pre)>code{background:#0b0d1229}.message-bubble pre{background:var(--surface-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;overflow-x:auto;margin:8px 0;max-width:100%}.message-bubble pre code{background:none;padding:0;font-size:13px;line-height:1.5;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--text)}.message-plain{margin:0;white-space:pre-wrap}.typing-dots{display:inline-flex;gap:4px;padding:4px 0}.typing-dots span{width:6px;height:6px;border-radius:50%;background:var(--text-muted);animation:typing-bounce 1.2s infinite ease-in-out}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-4px);opacity:1}}@media (prefers-reduced-motion: reduce){.typing-dots span{animation:none;opacity:.8}}.chat-error{margin:0 0 8px;padding:10px 12px;background:#ff6b6b1f;border:1px solid rgba(255,107,107,.4);color:var(--danger);border-radius:var(--radius-sm);font-size:13px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0}.chat-error-retry{flex-shrink:0;margin:0;padding:0;width:auto;color:var(--danger);text-decoration:underline;font-weight:600}.composer-wrap{flex-shrink:0;padding:12px 0 calc(16px + var(--safe-bottom))}.composer{display:flex;align-items:flex-end;gap:8px;background:var(--surface-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);padding:10px 10px 10px 16px;box-shadow:var(--shadow-md);transition:border-color var(--transition-fast)}.composer:focus-within{border-color:var(--accent)}.composer-input{flex:1;resize:none;max-height:160px;background:transparent;border:none;padding:8px 0;color:var(--text);font-size:15px;line-height:1.4}.composer-input:focus{outline:none}.composer-input:disabled{opacity:.6}.composer-input::placeholder{color:var(--text-muted)}.composer-send{flex-shrink:0;width:36px;height:36px;border-radius:50%;border:none;background:var(--accent);color:var(--accent-contrast);font-size:17px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--transition-fast)}.composer-send:hover:not(:disabled){background:var(--accent-strong)}.composer-send:disabled{opacity:.4;cursor:default}@media (max-width: 767px){.sidebar-toggle{display:inline-flex}.chat-header-mark{display:none}.sidebar{position:fixed;top:0;right:25%;bottom:0;left:0;z-index:20;transform:translate(-100%);transition:transform var(--transition-base);border-right:1px solid var(--border)}.sidebar.sidebar-open{transform:translate(0)}.sidebar-scrim{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:15}.chat-column{max-width:100%;padding:0 16px}.chat-header{padding:0 12px}.message-bubble{max-width:88%}}