:root{--bg: #F6F3EC;--surface: #FFFFFF;--surface-2: #EFEBE0;--border: #E1DBCB;--text: #211F1A;--text-muted: #6F6A5D;--accent: #A85A2E;--accent-soft: #F0DFCB;--accent-ink: #5C3016;--user-bubble: #EFEAE0;--font-display: "Fraunces", serif;--font-body: "Inter", -apple-system, sans-serif;--font-mono: "IBM Plex Mono", monospace;--radius: 10px}[data-theme=dark]{--bg: #1B1A16;--surface: #242219;--surface-2: #2C2A20;--border: #3A362A;--text: #EDE8DB;--text-muted: #A39C87;--accent: #D98A4F;--accent-soft: #4A3420;--accent-ink: #F0C7A0;--user-bubble: #2C2A20}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:268px;flex-shrink:0;background:var(--surface-2);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px}.sidebar.collapsed{width:0;padding:0;overflow:hidden;border-right:none}.brand{display:flex;align-items:baseline;gap:8px;padding:4px 8px 18px}.brand-mark{font-family:var(--font-display);font-size:21px;font-weight:600;letter-spacing:-.01em}.brand-curve{flex:1;height:20px;opacity:.6}.project-select{width:100%;padding:9px 10px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:13px;font-family:var(--font-body);margin-bottom:10px}.new-chat-btn{display:flex;align-items:center;gap:8px;width:100%;padding:9px 10px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:13px;font-weight:500;margin-bottom:14px;transition:border-color .15s ease}.new-chat-btn:hover{border-color:var(--accent)}.convo-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}.convo-item{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:8px 10px;border-radius:8px;font-size:13px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.convo-item:hover{background:var(--surface)}.convo-item.active{background:var(--accent-soft);color:var(--accent-ink)}.convo-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;text-align:left;background:none;border:none;color:inherit;font-size:inherit;font-family:inherit;padding:0}.convo-delete{opacity:0;border:none;background:none;color:var(--text-muted);font-size:14px;line-height:1;padding:2px 4px}.convo-item:hover .convo-delete{opacity:1}.sidebar-footer{padding-top:10px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.model-tag{font-family:var(--font-mono);font-size:10.5px;color:var(--text-muted)}.theme-toggle{border:none;background:none;font-size:13px;color:var(--text-muted)}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--border)}.icon-btn{border:none;background:none;font-size:15px;color:var(--text-muted);padding:4px 8px}.icon-btn:hover{color:var(--text)}.convo-heading{font-size:13.5px;color:var(--text-muted);font-family:var(--font-mono)}.messages{flex:1;overflow-y:auto;padding:24px 0 12px}.messages-inner{max-width:720px;margin:0 auto;padding:0 24px;display:flex;flex-direction:column;gap:22px}.empty-state{max-width:560px;margin:10vh auto 0;text-align:center;padding:0 24px}.empty-title{font-family:var(--font-display);font-size:30px;margin-bottom:8px}.empty-sub{color:var(--text-muted);font-size:14.5px;line-height:1.6}.curve-hero{width:220px;height:60px;margin:22px auto 0;opacity:.55}.msg-row{display:flex;flex-direction:column;gap:6px}.msg-role{font-family:var(--font-mono);font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.msg-row.user .msg-role{color:var(--accent-ink)}.msg-bubble{font-size:15px;line-height:1.65;white-space:pre-wrap;word-wrap:break-word}.msg-row.user .msg-bubble{background:var(--user-bubble);border-radius:var(--radius);padding:10px 14px;align-self:flex-end;max-width:85%}.msg-bubble code{font-family:var(--font-mono);background:var(--surface-2);padding:1px 5px;border-radius:4px;font-size:13.5px}.msg-bubble pre{background:#1e1c16;color:#ede8db;padding:12px 14px;border-radius:8px;overflow-x:auto;font-family:var(--font-mono);font-size:13px;line-height:1.55}.msg-bubble pre code{background:none;padding:0}.typing-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 1.1s infinite ease-in-out}@keyframes pulse{0%,to{opacity:.25}50%{opacity:1}}.attachment-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}.msg-row.user .attachment-row{align-self:flex-end}.attachment-chip{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-muted);background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:5px 9px;max-width:200px}.attachment-chip a{color:inherit;text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment-chip a:hover{color:var(--accent-ink);text-decoration:underline}.attachment-thumb{width:96px;height:96px;object-fit:cover;border-radius:8px;border:1px solid var(--border)}.pending-attachments{display:flex;flex-wrap:wrap;gap:8px;padding:0 24px 8px;max-width:720px;margin:0 auto}.pending-chip{display:flex;align-items:center;gap:6px;font-size:12.5px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:5px 8px 5px 10px;color:var(--text)}.pending-chip button{border:none;background:none;color:var(--text-muted);font-size:14px;line-height:1;padding:0 2px}.pending-chip button:hover{color:var(--accent-ink)}.composer{padding:14px 24px 22px}.composer-inner{max-width:720px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:10px}.composer-inner:focus-within{border-color:var(--accent)}.attach-btn{border:none;background:none;color:var(--text-muted);font-size:17px;width:34px;height:34px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center}.attach-btn:hover{color:var(--accent-ink);background:var(--surface-2)}.composer textarea{flex:1;border:none;outline:none;resize:none;background:none;color:var(--text);font-family:var(--font-body);font-size:14.5px;line-height:1.5;max-height:200px;padding:6px 0}.send-btn{border:none;background:var(--accent);color:#fff8ef;width:34px;height:34px;border-radius:9px;font-size:15px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:opacity .15s ease}.send-btn:disabled{opacity:.35;cursor:default}.error-banner{max-width:720px;margin:0 auto 10px;padding:8px 14px;border-radius:8px;background:#4a1f14;color:#f3d9c8;font-size:13px}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}