.icon{font-family:Material Symbols Rounded;font-weight:400;font-style:normal;font-size:20px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-feature-settings:"liga";font-variation-settings:"FILL" 0,"wght" 400,"GRAD" 0,"opsz" 20;flex-shrink:0}.icon-sm{font-size:16px;font-variation-settings:"FILL" 0,"wght" 400,"GRAD" 0,"opsz" 16}.icon-md{font-size:20px}.icon-lg{font-size:24px}.icon-xl{font-size:32px;font-variation-settings:"FILL" 0,"wght" 400,"GRAD" 0,"opsz" 32}.icon-filled{font-variation-settings:"FILL" 1,"wght" 400,"GRAD" 0,"opsz" 20}:root{--color-bg-primary:#ffffff;--color-bg-secondary:#f8fafc;--color-bg-tertiary:#f1f5f9;--color-bg-chat:#fafbfc;--color-bg-sidebar:#ffffff;--color-bg-hover:rgba(0,0,0,0.04);--color-bg-active:rgba(99,102,241,0.08);--color-bg-glass:rgba(255,255,255,0.85);--color-bg-glass-heavy:rgba(255,255,255,0.95);--color-bg-input:#ffffff;--color-text-primary:#0f172a;--color-text-secondary:#475569;--color-text-tertiary:#94a3b8;--color-text-inverse:#ffffff;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--color-border-focus:#6366f1;--color-accent:#6366f1;--color-accent-hover:#4f46e5;--color-accent-light:rgba(99,102,241,0.1);--color-accent-gradient:linear-gradient(135deg,#6366f1,#8b5cf6 50%,#a855f7);--color-accent-glow:0 0 20px rgba(99,102,241,0.3);--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--color-msg-user:linear-gradient(135deg,#6366f1,#7c3aed);--color-msg-ai:#ffffff;--color-msg-ai-border:#e2e8f0;--sidebar-width:280px;--sidebar-collapsed:68px;--header-height:56px;--input-max-width:768px;--chat-max-width:840px;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira Code","SF Mono",monospace;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:9999px;--shadow-xs:0 1px 2px rgba(0,0,0,0.04);--shadow-sm:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.07),0 2px 4px -2px rgba(0,0,0,0.05);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.08),0 4px 6px -4px rgba(0,0,0,0.04);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.08),0 8px 10px -6px rgba(0,0,0,0.04);--shadow-glow:0 0 30px rgba(99,102,241,0.15);--shadow-input:0 2px 8px rgba(0,0,0,0.04),0 0 0 1px rgba(0,0,0,0.04);--shadow-input-focus:0 0 0 3px rgba(99,102,241,0.15),0 2px 8px rgba(0,0,0,0.06);--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-base:200ms cubic-bezier(0.4,0,0.2,1);--transition-slow:300ms cubic-bezier(0.4,0,0.2,1);--transition-spring:400ms cubic-bezier(0.34,1.56,0.64,1)}[data-theme=dark]{--color-bg-primary:#0b0f1a;--color-bg-secondary:#111827;--color-bg-tertiary:#1e293b;--color-bg-chat:#0f1729;--color-bg-sidebar:#0d1117;--color-bg-hover:rgba(255,255,255,0.06);--color-bg-active:rgba(99,102,241,0.15);--color-bg-glass:rgba(15,23,42,0.85);--color-bg-glass-heavy:rgba(15,23,42,0.95);--color-bg-input:#1e293b;--color-text-primary:#f1f5f9;--color-text-secondary:#94a3b8;--color-text-tertiary:#64748b;--color-border:#1e293b;--color-border-light:#1e293b;--color-msg-ai:#1e293b;--color-msg-ai-border:#334155;--shadow-xs:0 1px 2px rgba(0,0,0,0.2);--shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 6px rgba(0,0,0,0.3);--shadow-lg:0 10px 15px rgba(0,0,0,0.35);--shadow-xl:0 20px 25px rgba(0,0,0,0.4)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-sans);color:var(--color-text-primary);background:var(--color-bg-primary);line-height:1.6;overflow:hidden;height:100vh;width:100vw}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;border:none;background:none}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-text-tertiary);border-radius:var(--radius-full);opacity:0}::-webkit-scrollbar-thumb:hover{background:var(--color-text-secondary)}.app-layout{width:100vw}.app-layout,.sidebar{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);flex-direction:column;background:var(--color-bg-sidebar);border-right:1px 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(max-width:1024px){:root{--sidebar-width:260px}.modal-content{max-width:90vw}.model-item-tags{max-width:120px;overflow:hidden}}@media (max-width:768px){.sidebar{position:fixed;left:0;top:0;height:100vh;height:100dvh;width:var(--sidebar-width);min-width:var(--sidebar-width);transform:translateX(-100%);transition:transform var(--transition-slow);z-index:50;box-shadow:var(--shadow-xl)}.sidebar.open{transform:translateX(0)}.app-layout.sidebar-hidden .sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width)}.app-layout.sidebar-hidden .sidebar>*{opacity:1;pointer-events:auto}.sidebar-overlay{display:block;position:fixed;inset:0;background:rgba(0,0,0,.5);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:40;animation:fadeIn var(--transition-base)}.welcome-screen{justify-content:flex-start;padding:24px 16px 20px}.welcome-title{font-size:22px}.welcome-subtitle{font-size:14px;margin-bottom:24px}.welcome-logo{width:56px;height:56px;margin-bottom:16px}.welcome-suggestions{grid-template-columns:1fr;gap:8px}.welcome-suggestion{padding:12px 14px;font-size:13px}.messages-list{padding:0 12px}.message-content{max-width:88%}.message-bubble{padding:10px 14px;font-size:14px}.message-avatar{width:28px;height:28px}.chat-header{padding:0 12px;height:48px}.chat-header-left{gap:6px}.model-selector{padding:5px 10px;font-size:12px}.chat-header-btn{width:32px;height:32px}.chat-header-right{gap:2px}.chat-input-container{padding:8px 10px max(8px,env(safe-area-inset-bottom));background:var(--color-bg-primary);border-top:1px solid var(--color-border)}.chat-input-wrapper{max-width:none}.chat-input-box{padding:6px 8px 6px 14px;border:1px solid var(--color-border);border-radius:var(--radius-full);box-shadow:var(--shadow-xs);background:var(--color-bg-secondary);min-height:44px;gap:4px;align-items:center}.chat-input-box:focus-within{border-color:var(--color-accent);box-shadow:0 0 0 2px var(--color-accent-light)}.chat-input-textarea{font-size:16px;padding:6px 2px;min-height:24px}.chat-input-actions{gap:0}.chat-input-btn{width:34px;height:34px}.chat-input-actions .chat-input-btn:nth-child(2),.chat-input-actions .chat-input-btn:nth-child(3){display:none}.chat-input-send{width:40px;height:40px;border-radius:50%;flex-shrink:0}.chat-input-hint{display:none}.modal-overlay{align-items:flex-end}.modal-content{width:100vw;max-width:100vw;max-height:92vh;max-height:92dvh;border-radius:var(--radius-xl) var(--radius-xl) 0 0;animation:modalSlideUp var(--transition-slow)}@keyframes modalSlideUp{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.modal-header{padding:14px 16px}.modal-search{padding:8px 16px}.modal-body{padding:4px}.model-item{padding:8px 10px;gap:10px}.model-item-name{font-size:13px}.model-item-meta{font-size:11px;gap:4px;flex-wrap:wrap}.model-item-tags{flex-wrap:wrap;max-width:80px}.model-tag{padding:1px 5px;font-size:9px}.provider-popover{left:4px!important;right:4px;min-width:auto!important;max-width:calc(100vw - 32px)!important}}@media (max-width:480px){:root{--sidebar-width:85vw}.welcome-title{font-size:20px}.welcome-subtitle{font-size:13px}.model-item-icon{display:none}.message-avatar{width:24px;height:24px;font-size:11px}.message{gap:8px}.chat-input-actions .chat-input-btn:not(:last-child){display:none}}@keyframes slideIn{0%{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg,var(--color-bg-tertiary) 25%,var(--color-bg-secondary) 50%,var(--color-bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}@keyframes pulse{0%,to{opacity:.4}50%{opacity:.8}}