@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap");:root{--brand-primary:#6366f1;--brand-primary-light:#818cf8;--brand-primary-dark:#4f46e5;--brand-accent:#06b6d4;--brand-accent-light:#22d3ee;--bg-primary:#0a0a0f;--bg-secondary:#111118;--bg-tertiary:#1a1a24;--bg-elevated:#22222e;--bg-glass:rgba(17,17,24,.85);--bg-glass-hover:rgba(26,26,36,.9);--text-primary:#f0f0f5;--text-secondary:#a0a0b8;--text-tertiary:#6b6b82;--text-inverse:#0a0a0f;--border-subtle:hsla(0,0%,100%,.06);--border-default:hsla(0,0%,100%,.1);--border-hover:hsla(0,0%,100%,.15);--border-active:rgba(99,102,241,.5);--status-success:#10b981;--status-warning:#f59e0b;--status-error:#ef4444;--status-info:#3b82f6;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--space-3xl:64px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--shadow-sm:0 1px 2px rgba(0,0,0,.3);--shadow-md:0 4px 12px rgba(0,0,0,.4);--shadow-lg:0 8px 32px rgba(0,0,0,.5);--shadow-glow:0 0 40px rgba(99,102,241,.15);--shadow-glow-accent:0 0 40px rgba(6,182,212,.15);--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira Code",monospace;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:250ms cubic-bezier(0.4,0,0.2,1);--transition-slow:400ms cubic-bezier(0.4,0,0.2,1);--max-width:720px;--header-height:64px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}body:before{top:-200px;right:-200px;background:radial-gradient(circle,rgba(99,102,241,.08) 0,transparent 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var(--border-subtle);background:transparent;cursor:pointer;font-family:var(--font-sans)}.back-button:hover{color:var(--text-primary);border-color:var(--border-hover);background:var(--bg-tertiary)}.empty-state{text-align:center;padding:var(--space-3xl) var(--space-lg)}.empty-state-icon{font-size:48px;margin-bottom:var(--space-md);opacity:.5}.empty-state-title{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-sm)}.empty-state-desc{font-size:14px;color:var(--text-tertiary);max-width:400px;margin:0 auto var(--space-lg)}.empty-state-action{padding:12px 24px;background:linear-gradient(135deg,var(--brand-primary),var(--brand-primary-dark));color:#fff;border:none;border-radius:var(--radius-md);font-size:14px;font-weight:600;cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans)}.empty-state-action:hover{box-shadow:var(--shadow-glow);transform:translateY(-1px)}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-elevated) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-card{height:180px;margin-bottom:var(--space-md);border-radius:var(--radius-lg)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@media (max-width:768px){.chat-page{grid-template-columns:1fr}.chat-sidebar{position:static}.chat-messages{max-height:50vh}.header-subtitle{display:none}.hero{padding:var(--space-xl) 0 var(--space-lg)}}@media (max-width:480px){.main-container{padding:var(--space-md) var(--space-sm)}.circular-card{padding:var(--space-md)}.header-badge{display:none}}.fade-in{animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.stagger-1{animation-delay:.05s;animation-fill-mode:both}.stagger-2{animation-delay:.1s;animation-fill-mode:both}.stagger-3{animation-delay:.15s;animation-fill-mode:both}.stagger-4{animation-delay:.2s;animation-fill-mode:both}.stagger-5{animation-delay:.25s;animation-fill-mode:both}[data-theme=light]{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-tertiary:#f1f5f9;--bg-elevated:#e2e8f0;--bg-glass:hsla(0,0%,100%,.85);--bg-glass-hover:rgba(248,250,252,.9);--text-primary:#0f172a;--text-secondary:#334155;--text-tertiary:#64748b;--text-inverse:#fff;--border-subtle:rgba(0,0,0,.06);--border-default:rgba(0,0,0,.1);--border-hover:rgba(0,0,0,.15);--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}[data-theme=light] .hero-title{background:linear-gradient(135deg,var(--brand-primary-dark) 0,var(--brand-accent-dark,#0891b2) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}[data-theme=light] .header-title{background:linear-gradient(135deg,var(--brand-primary-dark),var(--brand-accent-dark,#0891b2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}[data-theme=light] .chat-message.user{color:#fff}[data-theme=light] body:after,[data-theme=light] body:before{opacity:.5}.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-sm);background:var(--bg-tertiary);border:1px solid var(--border-default);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast)}.theme-toggle:hover{background:var(--bg-elevated);color:var(--text-primary);border-color:var(--border-hover)}