:root{color-scheme:dark;--bg: #020617;--bg-elevated: #0b1120;--border: #1e293b;--accent: #f97316;--text: #e5e7eb;--muted: #9ca3af}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg);color:var(--text)}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.header{background:var(--bg-elevated);border-bottom:1px solid var(--border);padding:1rem 2rem;text-align:center}.header h1{font-size:1.5rem;font-weight:700;color:var(--accent);margin-bottom:.25rem}.header p{font-size:.875rem;color:var(--muted)}.chat-shell{flex:1;display:flex;flex-direction:column;max-width:1000px;width:100%;margin:0 auto;overflow:hidden}.chat-window{flex:1;overflow-y:auto;padding:2rem 1rem;display:flex;flex-direction:column;gap:1.5rem}.message{display:flex;flex-direction:column;max-width:75%}.message.user{align-self:flex-end;align-items:flex-end}.message.assistant{align-self:flex-start;align-items:flex-start}.message-bubble{padding:1rem 1.25rem;border-radius:18px;white-space:pre-wrap;word-wrap:break-word}.message.user .message-bubble{background:#020617;border:1px solid var(--accent)}.message.assistant .message-bubble{background:#111827;border-left:3px solid var(--accent)}.message-timestamp{font-size:.75rem;color:var(--muted);margin-top:.25rem;padding:0 .5rem}.input-area{background:var(--bg-elevated);border-top:1px solid var(--border);padding:1rem 2rem}.input-shell{max-width:1000px;margin:0 auto}.error-banner{background:#7f1d1d;color:#fecaca;padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.875rem}.loading-indicator{color:var(--accent);font-size:.875rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.spinner{width:14px;height:14px;border:2px solid var(--accent);border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.input-row{display:flex;gap:.75rem;align-items:flex-end}.input-row textarea{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:.875rem 1rem;color:var(--text);font-size:.9375rem;font-family:inherit;resize:none;min-height:50px;max-height:200px;outline:none;transition:border-color .2s}.input-row textarea:focus{border-color:var(--accent)}.input-row button{background:var(--accent);color:#fff;border:none;border-radius:12px;padding:.875rem 1.5rem;font-size:.9375rem;font-weight:600;cursor:pointer;transition:opacity .2s;white-space:nowrap}.input-row button:hover:not(:disabled){opacity:.9}.input-row button:disabled{opacity:.5;cursor:not-allowed}.chat-window::-webkit-scrollbar{width:8px}.chat-window::-webkit-scrollbar-track{background:var(--bg)}.chat-window::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.chat-window::-webkit-scrollbar-thumb:hover{background:var(--muted)}