:root{--color-primary: #1A73E8;--color-primary-dark: #1557B0;--color-background: #F8F9FA;--color-surface: #FFFFFF;--color-text: #202124;--color-text-secondary: #5F6368;--color-border: #DADCE0;--color-error: #D93025;--radius-bubble: 18px;--radius-card: 10px;--font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden;font-family:var(--font);font-size:15px;color:var(--color-text);background:var(--color-background);-webkit-text-size-adjust:100%}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:12px;background:var(--color-background)}.loading-logo{width:56px;height:56px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:24px;font-weight:700;display:flex;align-items:center;justify-content:center;animation:pulse 1.4s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.loading-screen p{color:var(--color-text-secondary);font-size:14px}.chat-layout{display:flex;flex-direction:column;height:100dvh;height:100vh;max-width:768px;margin:0 auto;background:var(--color-background)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-shrink:0}.chat-header-info{display:flex;align-items:center;gap:10px}.chat-header-avatar{width:36px;height:36px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.chat-header-title{font-size:15px;font-weight:600;line-height:1.2}.chat-header-subtitle{font-size:12px;color:var(--color-text-secondary)}.chat-header-actions{display:flex;gap:4px}.icon-btn{width:36px;height:36px;border:none;background:transparent;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary);transition:background .15s}.icon-btn:hover{background:var(--color-background)}.icon-btn svg{width:18px;height:18px}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.message-row{display:flex;align-items:flex-end;gap:8px;max-width:100%}.message-row--user{flex-direction:row-reverse}.message-row--bot{flex-direction:row}.avatar{width:28px;height:28px;border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}.avatar svg{width:16px;height:16px}.message-content{display:flex;flex-direction:column;gap:6px;max-width:min(80%,460px)}.bubble{padding:10px 14px;border-radius:var(--radius-bubble);line-height:1.55;word-break:break-word}.bubble--user{background:var(--color-primary);color:#fff;border-bottom-right-radius:4px}.bubble--bot{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-bottom-left-radius:4px}.bubble--bot p{margin:0 0 8px}.bubble--bot p:last-child{margin-bottom:0}.bubble--bot ul,.bubble--bot ol{padding-left:18px;margin:6px 0}.bubble--bot li{margin:2px 0}.bubble--bot strong{font-weight:600}.bubble--bot em{font-style:italic}.bubble--bot code{font-size:13px;background:#f1f3f4;padding:1px 4px;border-radius:4px}.bubble--bot blockquote{border-left:3px solid var(--color-primary);padding-left:10px;color:var(--color-text-secondary);margin:6px 0;font-size:13px}.bubble--bot a{color:var(--color-primary);text-decoration:underline}.bubble--bot h1,.bubble--bot h2,.bubble--bot h3{font-size:15px;font-weight:600;margin:8px 0 4px}.typing-indicator{display:flex;gap:5px;align-items:center;padding:2px 0}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:var(--color-text-secondary);animation:typing-bounce 1.2s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}.citations{display:flex;flex-direction:column;gap:6px}.citations-label{font-size:11px;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px}.citation-card{display:flex;align-items:center;gap:8px;padding:8px 10px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);cursor:pointer;text-align:left;width:100%;font-size:13px;color:var(--color-text);transition:border-color .15s,background .15s}.citation-card:hover{border-color:var(--color-primary);background:#eaf1fb}.citation-index{width:20px;height:20px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}.citation-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--color-primary)}.citation-arrow{width:14px;height:14px;flex-shrink:0;color:var(--color-text-secondary)}.chat-footer{flex-shrink:0;background:var(--color-surface);border-top:1px solid var(--color-border)}.chat-input-area{display:flex;align-items:flex-end;gap:8px;padding:10px 12px}.chat-textarea{flex:1;resize:none;border:1px solid var(--color-border);border-radius:22px;padding:10px 14px;font-family:var(--font);font-size:15px;line-height:1.4;color:var(--color-text);background:var(--color-background);outline:none;min-height:42px;max-height:120px;transition:border-color 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