.chat-container{z-index:1;flex-direction:column;max-width:900px;height:100vh;margin:0 auto;display:flex;position:relative}.chat-header{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0a0a0ab3;flex-shrink:0;padding:16px 24px}.header-logo{opacity:.9;filter:invert();width:auto;height:28px}.chat-header-content{align-items:center;gap:12px;display:flex}.chat-header h1{letter-spacing:-.02em;margin:0;font-size:18px;font-weight:600}.model-badge{color:var(--muted);background:var(--surface);border:1px solid var(--border);font-size:12px;font-family:var(--font-geist-mono),monospace;border-radius:12px;padding:2px 10px}.messages-area{flex-direction:column;flex:1;gap:24px;padding:24px;display:flex;overflow-y:auto}.empty-state{text-align:center;color:var(--muted);flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}.empty-state-logo{opacity:.85;filter:invert();width:auto;height:80px;margin-bottom:24px}.empty-state h2{color:var(--foreground);margin:0 0 8px;font-size:24px;font-weight:500}.empty-state p{margin:0;font-size:14px}.message{flex-direction:column;display:flex}.message-bubble{max-width:100%}.message.user .message-bubble{align-self:flex-end;max-width:80%}.message-role{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:12px;font-weight:600}.message.user .message-role{text-align:right}.message-content{white-space:pre-wrap;word-break:break-word;border-radius:12px;padding:12px 16px;font-size:15px;line-height:1.65}.message.user .message-content{background:var(--user-bubble);border-radius:12px 12px 4px}.message.assistant .message-content{background:var(--assistant-bubble);border:1px solid var(--border);border-radius:12px 12px 12px 4px}.reasoning-box{border:1px solid var(--border);color:var(--muted);background:#ffffff05;border-radius:10px;margin-bottom:8px;font-size:13px;overflow:hidden}.reasoning-summary{cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--muted);align-items:center;gap:6px;padding:8px 14px;font-weight:500;list-style:none;display:flex}.reasoning-summary::-webkit-details-marker{display:none}.reasoning-summary:before{content:"▸";font-size:10px;transition:transform .15s;display:inline-block}.reasoning-box[open] .reasoning-summary:before{transform:rotate(90deg)}.reasoning-summary:hover{color:var(--foreground)}.reasoning-content{white-space:pre-wrap;word-break:break-word;font-family:var(--font-geist-mono),ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted);border-top:1px solid var(--border);max-height:360px;padding:10px 14px 12px;font-size:12px;line-height:1.55;overflow-y:auto}.markdown-body{white-space:normal}.markdown-body>:first-child{margin-top:0}.markdown-body>:last-child{margin-bottom:0}.markdown-body p{margin:0 0 12px}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{letter-spacing:-.01em;margin:20px 0 10px;font-weight:600;line-height:1.3}.markdown-body h1{font-size:1.5em}.markdown-body h2{font-size:1.3em}.markdown-body h3{font-size:1.15em}.markdown-body h4{font-size:1em}.markdown-body h5,.markdown-body h6{color:var(--muted);font-size:.95em}.markdown-body ul,.markdown-body ol{margin:0 0 12px;padding-left:24px}.markdown-body li{margin:4px 0}.markdown-body li>p{margin:0 0 6px}.markdown-body a{color:var(--accent);text-underline-offset:2px;text-decoration:underline}.markdown-body a:hover{text-decoration-thickness:2px}.markdown-body code{font-family:var(--font-geist-mono),ui-monospace,SFMono-Regular,Menlo,monospace;border:1px solid var(--border);background:#ffffff14;border-radius:4px;padding:1px 5px;font-size:.9em}.markdown-body pre{border:1px solid var(--border);background:#0006;border-radius:8px;margin:0 0 12px;padding:12px 14px;font-size:.9em;line-height:1.5;overflow-x:auto}.markdown-body pre code{font-size:inherit;white-space:pre;background:0 0;border:none;padding:0}.markdown-body blockquote{border-left:3px solid var(--border);color:var(--muted);margin:0 0 12px;padding:4px 14px}.markdown-body blockquote>:last-child{margin-bottom:0}.markdown-body hr{border:none;border-top:1px solid var(--border);margin:16px 0}.markdown-body table{border-collapse:collapse;margin:0 0 12px;font-size:.95em;display:block;overflow-x:auto}.markdown-body th,.markdown-body td{border:1px solid var(--border);text-align:left;padding:6px 10px}.markdown-body th{background:#ffffff0a;font-weight:600}.markdown-body img{border-radius:8px;max-width:100%}.markdown-body .katex-display{margin:12px 0;padding:4px 0;overflow:auto hidden}.cursor{background:var(--accent);vertical-align:text-bottom;width:2px;height:1em;margin-left:2px;animation:.8s step-end infinite blink;display:inline-block}@keyframes blink{50%{opacity:0}}.error-bar{color:#f87171;background:#3b1111;border-top:1px solid #6b2020;flex-shrink:0;justify-content:space-between;align-items:center;padding:10px 24px;font-size:13px;display:flex}.error-bar button{color:#f87171;cursor:pointer;background:0 0;border:none;padding:0;font-size:13px;text-decoration:underline}.input-area{border-top:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0a0a0ab3;flex-shrink:0;padding:16px 24px 20px}.input-wrapper{background:var(--surface);border:1px solid var(--border);border-radius:16px;align-items:flex-end;gap:8px;padding:8px 8px 8px 16px;transition:border-color .15s;display:flex}.input-wrapper:focus-within{border-color:var(--accent)}.input-wrapper textarea{resize:none;color:var(--foreground);background:0 0;border:none;outline:none;flex:1;max-height:200px;padding:4px 0;font-family:inherit;font-size:15px;line-height:1.5}.input-wrapper textarea::placeholder{color:var(--muted)}.send-button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;transition:background .15s;display:flex}.send-button:hover:not(:disabled){background:var(--accent-hover)}.send-button:disabled{opacity:.3;cursor:not-allowed}.input-hint{color:var(--muted);text-align:center;margin-top:8px;font-size:11px}@media (max-width:640px){.chat-header{padding:12px 16px}.messages-area{gap:16px;padding:16px}.message.user .message-bubble{max-width:90%}.input-area{padding:12px 16px 16px}.empty-state h2{font-size:20px}}