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:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-card:#ffffff0a;--bg-card-hover:#ffffff14;--bg-gradient-1:#1a0533;--bg-gradient-2:#0d0d1a;--accent-primary:#8b5cf6;--accent-secondary:#6366f1;--accent-glow:#8b5cf64d;--text-primary:#f1f1f7;--text-secondary:#a1a1b5;--text-muted:#6b6b80;--border-color:#ffffff14;--border-color-hover:#ffffff26;--user-bubble-start:#7c3aed;--user-bubble-end:#6366f1;--error-color:#f87171;--success-color:#34d399;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--shadow-lg:0 8px 32px #0006;--shadow-glow:0 0 40px #8b5cf626;--transition-fast:.15s ease;--transition-normal:.25s ease;--transition-slow:.4s ease}*{box-sizing:border-box;margin:0;padding:0}html{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;height:100%}body{min-height:100%;color:var(--text-primary);background:linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2));-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200%}to{background-position:200%}}@keyframes pulse{0%,to{opacity:.4}50%{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}.app-container{width:100%;max-width:900px;height:100vh;animation:fadeIn var(--transition-slow) ease;flex-direction:column;margin:0 auto;padding:0 16px;display:flex}.chat-header{border-bottom:1px solid var(--border-color);flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;padding:16px 0;display:flex}.chat-header-left{align-items:center;gap:12px;display:flex}.chat-header-logo{background:linear-gradient(135deg, var(--user-bubble-start), var(--user-bubble-end));border-radius:var(--radius-sm);flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:18px;display:flex}.chat-header-title{letter-spacing:-.03em;font-size:18px;font-weight:600}.chat-header-controls{align-items:center;gap:8px;display:flex}.provider-toggle{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-color);padding:3px;display:flex}.provider-btn{color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast) ease;background:0 0;border:none;border-radius:8px;padding:6px 14px;font-family:inherit;font-size:13px;font-weight:500}.provider-btn.active{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));color:#fff;box-shadow:0 2px 10px var(--accent-glow)}.provider-btn:hover:not(.active){color:var(--text-secondary)}.model-select-wrapper{position:relative}.model-select{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast) ease;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a1a1b5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-position:right 10px center;background-repeat:no-repeat;padding:6px 32px 6px 12px;font-family:inherit;font-size:13px;font-weight:500}.model-select:hover{border-color:var(--border-color-hover)}.model-select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-glow);outline:none}.messages-container{scroll-behavior:smooth;flex-direction:column;flex:1;gap:16px;padding:24px 0;display:flex;overflow-y:auto}.messages-container::-webkit-scrollbar{width:6px}.messages-container::-webkit-scrollbar-track{background:0 0}.messages-container::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.messages-container::-webkit-scrollbar-thumb:hover{background:var(--border-color-hover)}.message{animation:slideUp var(--transition-normal) ease;gap:12px;display:flex}.message.user{justify-content:flex-end}.message-bubble{border-radius:var(--radius-lg);word-wrap:break-word;white-space:pre-wrap;max-width:80%;padding:12px 18px;font-size:15px;line-height:1.6}.message.user .message-bubble{background:linear-gradient(135deg, var(--user-bubble-start), var(--user-bubble-end));color:#fff;border-bottom-right-radius:4px}.message.assistant .message-bubble{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom-left-radius:4px}.message-bubble p{margin-bottom:8px}.message-bubble p:last-child{margin-bottom:0}.message-bubble pre{border-radius:var(--radius-sm);border:1px solid var(--border-color);background:#0006;margin:8px 0;padding:12px;font-size:13px;overflow-x:auto}.message-bubble code{font-family:JetBrains Mono,Fira Code,monospace;font-size:13px}.message-bubble :not(pre)>code{color:var(--accent-primary);background:#8b5cf626;border-radius:4px;padding:2px 6px}.message-bubble ul,.message-bubble ol{margin:8px 0;padding-left:20px}.message-bubble li{margin-bottom:4px}.message-bubble h1,.message-bubble h2,.message-bubble h3{margin:12px 0 6px;font-weight:600}.message-bubble blockquote{border-left:3px solid var(--accent-primary);color:var(--text-secondary);margin:8px 0;padding-left:12px}.message-bubble a{color:var(--accent-primary);text-decoration:underline}.empty-state{animation:fadeIn var(--transition-slow) ease;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:16px;display:flex}.empty-state-icon{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));border-radius:var(--radius-xl);width:80px;height:80px;box-shadow:var(--shadow-glow);justify-content:center;align-items:center;font-size:36px;animation:3s ease-in-out infinite pulse;display:flex}.empty-state-title{color:var(--text-primary);letter-spacing:-.02em;font-size:22px;font-weight:600}.empty-state-subtitle{color:var(--text-secondary);text-align:center;max-width:400px;font-size:15px;line-height:1.5}.typing-indicator{align-items:center;gap:4px;padding:4px 0;display:flex}.typing-dot{background:var(--accent-primary);border-radius:50%;width:6px;height:6px;animation:1.4s ease-in-out infinite pulse}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}.message.assistant .message-bubble.loading{background:var(--bg-card);border:1px solid var(--border-color);align-items:center;min-width:60px;display:flex}.chat-input-container{flex-shrink:0;padding:16px 0}.chat-input-wrapper{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:border-color var(--transition-fast) ease;align-items:flex-end;gap:8px;padding:8px;display:flex}.chat-input-wrapper:focus-within{border-color:var(--accent-primary);box-shadow:0 0 0 2px var(--accent-glow)}.chat-input{color:var(--text-primary);resize:none;background:0 0;border:none;outline:none;flex:1;max-height:150px;padding:6px 10px;font-family:inherit;font-size:15px;line-height:1.5}.chat-input::placeholder{color:var(--text-muted)}.send-btn{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));border-radius:var(--radius-sm);color:#fff;cursor:pointer;width:40px;height:40px;transition:all var(--transition-fast) ease;border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}.send-btn:hover:not(:disabled){box-shadow:0 4px 15px var(--accent-glow);transform:scale(1.05)}.send-btn:active:not(:disabled){transform:scale(.95)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.send-btn svg{width:18px;height:18px}.error-toast{color:var(--error-color);border-radius:var(--radius-md);animation:slideUp var(--transition-normal) ease;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:100;background:#f8717126;border:1px solid #f871714d;padding:12px 20px;font-size:14px;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}@media (max-width:640px){.app-container{padding:0 12px}.chat-header{flex-wrap:wrap}.chat-header-controls{justify-content:flex-end;width:100%}.message-bubble{max-width:90%;font-size:14px}.chat-header-title{font-size:16px}}