:root{--bg:#11100d;--panel:#181713;--panel-2:#201e18;--line:#38352b;--line-strong:#5a533f;--text:#ede6d3;--muted:#9d9581;--dim:#746d5d;--accent:#d8ff66;--amber:#ffbd5a;--danger:#ff6a55;--ok:#78d58a;--shadow:0 24px 80px #0000006b}*{box-sizing:border-box}body{background:radial-gradient(circle at 15% 8%, #d8ff6614, transparent 30%), linear-gradient(135deg, #ffbd5a0f, transparent 34%), var(--bg);min-height:100vh;color:var(--text);margin:0;font-family:Aptos,Helvetica Neue,sans-serif}button,input,textarea,select{font:inherit}button{border:1px solid var(--line-strong);min-height:36px;color:var(--text);cursor:pointer;background:#242117;border-radius:6px;padding:0 14px;transition:border-color .12s,color .12s,background .12s}button:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:#2c291d}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{border:1px solid var(--line);width:100%;color:var(--text);background:#100f0c;border-radius:6px;outline:none}input,select{height:38px;padding:0 10px}textarea{resize:none;padding:14px;line-height:1.5}input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #d8ff661a}.shell{background:var(--line);grid-template-columns:minmax(240px,300px) minmax(420px,1fr) minmax(300px,420px);gap:1px;height:100vh;display:grid}.left-rail,.conversation,.trace-rail{background:#11100df5;min-width:0}.left-rail,.trace-rail{overflow:auto}.left-rail{padding:22px}.brand{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding-bottom:24px;display:flex}.mark{border:1px solid var(--accent);width:44px;height:44px;color:var(--accent);letter-spacing:0;border-radius:6px;place-items:center;font-family:SF Mono,Cascadia Code,monospace;font-size:12px;font-weight:700;display:grid}h1,h2,p{margin:0}h1{font-size:16px;font-weight:700}h2{font-size:18px;font-weight:700}.brand p,.eyebrow,.section-title,label,.run-state{color:var(--muted);letter-spacing:0;font-family:SF Mono,Cascadia Code,monospace;font-size:11px}.control-group{margin-top:18px}label{text-transform:uppercase;margin-bottom:7px;display:block}.inline-input,.file-uploader{grid-template-columns:minmax(0,1fr) auto;gap:8px;display:grid}.session-list-header{color:var(--muted);text-transform:uppercase;justify-content:space-between;align-items:center;gap:8px;margin-top:10px;font-family:SF Mono,Cascadia Code,monospace;font-size:11px;display:flex}.session-list-header button{min-height:26px;padding:0 9px;font-size:12px}.session-list{gap:7px;max-height:210px;margin-top:8px;display:grid;overflow:auto}.session-option{text-align:left;background:#ffffff05;justify-items:start;gap:3px;min-height:52px;padding:8px 10px;display:grid}.session-option.active{color:var(--accent);background:#1d2112;border-color:#d8ff668c}.session-option span,.session-option code{text-overflow:ellipsis;white-space:nowrap;max-width:100%;overflow:hidden}.session-option span{font-size:13px}.session-option code,.session-empty{color:var(--muted);font-family:SF Mono,Cascadia Code,monospace;font-size:11px}.session-empty{border:1px dashed var(--line);border-radius:6px;padding:10px}.file-input{clip:rect(0 0 0 0);white-space:nowrap;clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.file-trigger{border:1px solid var(--line-strong);min-height:36px;color:var(--text);cursor:pointer;letter-spacing:0;text-transform:none;background:#242117;border-radius:6px;justify-content:center;align-items:center;margin:0;font-family:inherit;font-size:14px;transition:border-color .12s,color .12s,background .12s;display:flex}.file-trigger:hover,.file-input:focus-visible+.file-trigger{border-color:var(--accent);color:var(--accent);background:#2c291d}.file-uploader button{white-space:nowrap}.selected-file{border:1px solid var(--line);min-height:30px;color:var(--text);background:#100f0c;border-radius:6px;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;padding:0 9px;font-size:12px;display:flex}.selected-file.empty{color:var(--dim)}.selected-file span{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.selected-file code{color:var(--accent);flex:none;font-family:SF Mono,Cascadia Code,monospace;font-size:11px}.tool-list{border-top:1px solid var(--line);margin-top:24px;padding-top:18px}.section-title{text-transform:uppercase;margin-bottom:10px}.status-list{gap:8px;display:grid}.status-row{border:1px solid var(--line);background:#ffffff05;border-radius:6px;padding:9px 10px}.status-row strong{font-size:13px;display:block}.status-row span{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-family:SF Mono,Cascadia Code,monospace;font-size:11px;display:block;overflow:hidden}.conversation{grid-template-rows:auto minmax(0,1fr) auto;min-height:100vh;display:grid}.topbar,.trace-header{border-bottom:1px solid var(--line);background:#181713cc;justify-content:space-between;align-items:center;gap:16px;min-height:78px;padding:18px 22px;display:flex}.topbar-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.messages{padding:22px;overflow:auto}.message{max-width:860px;margin-bottom:18px}.message .meta{color:var(--dim);text-transform:uppercase;margin-bottom:6px;font-family:SF Mono,Cascadia Code,monospace;font-size:11px}.bubble{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);white-space:pre-wrap;border-radius:8px;padding:14px 15px;line-height:1.55}.message.user{margin-left:auto}.message.user .bubble{background:#1d2112;border-color:#d8ff6659}.message.assistant .bubble{background:#171611}.message.streaming .bubble:after{content:"";border-right:2px solid var(--accent);vertical-align:-.15em;width:7px;height:1em;margin-left:4px;animation:.9s steps(2,start) infinite blink;display:inline-block}.composer{border-top:1px solid var(--line);background:#181713f5;padding:16px 18px}.composer-actions{justify-content:space-between;align-items:center;gap:12px;margin-top:10px;display:flex}.run-state{min-height:18px}.run-state.busy:before{content:"";border:1px solid var(--accent);border-top-color:#0000;border-radius:50%;width:8px;height:8px;margin-right:8px;animation:.7s linear infinite spin;display:inline-block}.trace-rail{grid-template-rows:auto minmax(0,1fr);display:grid}.trace-list{padding:14px;overflow:auto}.trace-item{border:1px solid var(--line);background:#ffffff06;border-left-width:3px;border-radius:6px;margin-bottom:10px;position:relative}.trace-item.thought{border-left-color:var(--accent)}.trace-item.model_request{background:#7fd7ff09;border-left-color:#7fd7ff}.trace-item.tool_call{border-left-color:var(--amber)}.trace-item.tool_result{border-left-color:var(--ok)}.trace-item.error{border-left-color:var(--danger)}.trace-title{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:8px;padding:10px 11px;font-size:13px;display:flex}.trace-title code{color:var(--accent);font-family:SF Mono,Cascadia Code,monospace;font-size:11px}.trace-body{color:var(--muted);white-space:pre-wrap;overflow-wrap:anywhere;padding:10px 11px;font-family:SF Mono,Cascadia Code,monospace;font-size:11px;line-height:1.5}.trace-body details{margin-top:8px}.trace-body summary{color:var(--text);cursor:pointer}.empty{color:var(--dim);font-family:SF Mono,Cascadia Code,monospace;font-size:12px}@keyframes spin{to{transform:rotate(360deg)}}@keyframes blink{50%{opacity:0}}@media (width<=1100px){.shell{grid-template-columns:minmax(220px,280px) minmax(0,1fr)}.trace-rail{display:none}}@media (width<=720px){.shell{grid-template-columns:1fr;height:auto;min-height:100vh}.left-rail{order:2}.conversation{min-height:100vh}}