:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;-webkit-font-smoothing:antialiased;font-family:system-ui,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}body{margin:0}:root{--bg-start:#0a0e1a;--bg-end:#141b2d;--card-bg:#ffffff0a;--card-border:#ffffff14;--sidebar-bg:#00000040;--text:#e5e7eb;--text-dim:#8b93a7;--accent:#6366f1;--accent-hover:#7c7fe9;--error:#f87171}*{box-sizing:border-box}html,body{height:100%;overflow:hidden}body{background:radial-gradient(ellipse at top, #1f2a44 0%, transparent 60%), linear-gradient(180deg, var(--bg-start) 0%, var(--bg-end) 100%);color:var(--text);-webkit-font-smoothing:antialiased;background-attachment:fixed;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;position:fixed;inset:0}.app{height:var(--app-height,100dvh);transform:translateY(var(--app-offset,0px));display:flex}.sidebar{background:var(--sidebar-bg);border-right:1px solid var(--card-border);flex-direction:column;flex-shrink:0;gap:.5rem;width:260px;padding:1rem;display:flex}.new-chat-btn{text-align:left;background:var(--card-bg);border:1px solid var(--card-border);width:100%;color:var(--text);cursor:pointer;border-radius:10px;padding:.75rem 1rem;font-weight:500;transition:background .15s,border-color .15s}.new-chat-btn:hover{border-color:var(--accent);background:#6366f11f}.chat-list{flex-direction:column;flex:1;gap:.25rem;margin:0;padding:0;list-style:none;display:flex;overflow-y:auto}.chat-item{color:var(--text-dim);cursor:pointer;white-space:nowrap;text-overflow:ellipsis;border-radius:8px;padding:.7rem .85rem;font-size:.92rem;transition:background .15s,color .15s;overflow:hidden}.chat-item:hover{background:var(--card-bg);color:var(--text)}.chat-item.active{color:var(--text);background:#6366f12e}.sidebar-overlay{display:none}main{flex-direction:column;flex:1;min-width:0;padding:1.5rem 2rem;display:flex}form{width:100%;max-width:820px;margin-left:auto;margin-right:auto}.topbar{align-items:center;gap:.75rem;margin-bottom:.75rem;display:flex}.menu-btn{border:1px solid var(--card-border);color:var(--text);cursor:pointer;background:0 0;border-radius:8px;padding:.5rem .75rem;font-size:1.1rem;display:none}h1{letter-spacing:-.02em;background:linear-gradient(135deg,#e5e7eb 0%,#8b93a7 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-size:1.6rem;font-weight:700}.messages{flex-direction:column;flex:1;gap:1.5rem;padding:.5rem max(0px,50% - 410px);display:flex;overflow-y:auto}.empty-hint{color:var(--text-dim);text-align:center;margin:auto;font-style:italic}.message{border-radius:14px;max-width:min(80%,720px);padding:.75rem 1rem;animation:.25s ease-out fadeInUp}.message pre{white-space:pre-wrap;word-wrap:break-word;margin:0;font-family:inherit;font-size:.95rem;line-height:1.5}.message.user{background:var(--accent);color:#fff;align-self:flex-end}.message.assistant{background:var(--card-bg);border:1px solid var(--card-border);align-self:flex-start}.message-reasoning{border-left:2px solid var(--accent);color:var(--text-dim);background:#ffffff08;border-radius:6px;margin:0 0 .6rem;padding:.5rem .75rem;font-size:.85rem}.message-reasoning summary{cursor:pointer;color:var(--text);-webkit-user-select:none;user-select:none;font-weight:500}.message-reasoning pre{white-space:pre-wrap;margin:.5rem 0 0;font-family:inherit;font-size:.85rem;line-height:1.5}.message-steps{color:var(--text-dim);flex-direction:column;gap:.2rem;margin:0 0 .6rem;padding:0;font-size:.82rem;font-style:italic;list-style:none;display:flex}.loading-bubble{gap:.25rem;display:inline-flex}.generating{color:var(--text-dim);align-items:center;gap:.5rem;font-size:.95rem;font-style:italic;display:flex}.loading-bubble span{background:var(--text-dim);border-radius:50%;width:6px;height:6px;animation:1.4s infinite blink}.loading-bubble span:nth-child(2){animation-delay:.2s}.loading-bubble span:nth-child(3){animation-delay:.4s}@keyframes blink{0%,60%,to{opacity:.3}30%{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.error{color:var(--error);background:#f8717114;border:1px solid #f8717133;border-radius:10px;margin:.5rem 0;padding:.6rem .9rem;font-size:.9rem}form{gap:.5rem;padding-top:1rem;display:flex}input,textarea{color:var(--text);background:var(--card-bg);border:1px solid var(--card-border);border-radius:10px;outline:none;flex:1;padding:.85rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .15s,background .15s}textarea{resize:none;min-height:2.7rem;max-height:160px;line-height:1.4;overflow-y:auto}input::placeholder,textarea::placeholder{color:var(--text-dim)}input:focus,textarea:focus{border-color:var(--accent);background:#6366f114}form button[type=submit]{color:#fff;background:var(--accent);cursor:pointer;border:0;border-radius:10px;padding:.85rem 1.4rem;font-family:inherit;font-size:1rem;font-weight:600;transition:background .15s,transform .1s}form button[type=submit]:hover:not(:disabled){background:var(--accent-hover)}form button[type=submit]:active:not(:disabled){transform:scale(.97)}form button[type=submit]:disabled{opacity:.4;cursor:not-allowed}@media (width<=768px){.menu-btn{display:inline-block}.sidebar{z-index:20;background:var(--bg-start);width:280px;transition:transform .25s ease-out;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay{z-index:10;background:#00000080;display:block;position:fixed;inset:0}main{padding:1rem}}