:root {
  --bg: #0e1117; --panel: #161b22; --panel2: #1c2230; --border: #2a3140;
  --text: #e6edf3; --muted: #8b95a5; --accent: #6ea8fe; --accent2: #7ee0a8;
  --danger: #ff7b72; --warn: #e3b341;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); height: 100vh; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; letter-spacing: .3px; }
.brand .sub { color: var(--muted); font-weight: 400; font-size: 12px; margin-left: 6px; }
.controls { display: flex; align-items: center; gap: 14px; }
.mode { font-size: 12px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
.mode select { background: var(--panel2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 4px 6px; }
.status { font-size: 12px; color: var(--muted); }
.status.live { color: var(--accent2); }
.status.busy { color: var(--warn); }
.status.err { color: var(--danger); }

.layout { flex: 1; display: grid; grid-template-columns: minmax(360px, 42%) 1fr; min-height: 0; }
.chat { display: flex; flex-direction: column; border-right: 1px solid var(--border); min-height: 0; }
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.msg { padding: 10px 12px; border-radius: 10px; max-width: 92%; white-space: pre-wrap; word-break: break-word; font-size: 14px; line-height: 1.45; }
.msg.user { align-self: flex-end; background: #234; border: 1px solid #345; }
.msg.assistant { align-self: flex-start; background: var(--panel); border: 1px solid var(--border); }
.msg.narration { align-self: center; color: var(--muted); font-size: 12px; background: transparent; }
.msg.error { align-self: flex-start; background: #3a1d1b; border: 1px solid var(--danger); color: #ffd7d3; }
.tool { align-self: flex-start; font-size: 12.5px; background: var(--panel2); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; max-width: 92%; }
.tool .name { color: var(--accent); font-weight: 600; }
.tool .args { color: var(--muted); font-size: 11.5px; margin-top: 2px; overflow-x: auto; }
.tool.result { color: var(--muted); }
.tool.result.err { color: var(--danger); border-color: var(--danger); }
.tool details summary { cursor: pointer; }
.artifact { align-self: flex-start; background: linear-gradient(180deg,#132033,#0f1826); border: 1px solid var(--accent); border-radius: 10px; padding: 10px 12px; }
.artifact a { color: var(--accent); }
.subagent { align-self: center; font-size: 12px; color: var(--accent2); }

.qform { align-self: flex-start; background: var(--panel); border: 1px solid var(--accent); border-radius: 10px; padding: 12px; max-width: 92%; }
.qform h4 { margin: 0 0 8px; font-size: 13px; }
.qform button { margin: 4px 6px 0 0; }

.composer { border-top: 1px solid var(--border); padding: 10px; display: flex; flex-direction: column; gap: 8px; background: var(--panel); }
.composer textarea { width: 100%; resize: vertical; background: var(--panel2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px; font: inherit; }
.composer-actions { display: flex; justify-content: flex-end; gap: 8px; }
.btn { background: var(--accent); color: #08131f; border: none; border-radius: 8px; padding: 7px 16px; font-weight: 600; cursor: pointer; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.small { padding: 3px 10px; font-size: 12px; }

.workbench { display: flex; flex-direction: column; min-height: 0; }
.tabs { display: flex; gap: 2px; padding: 8px 8px 0; background: var(--panel); border-bottom: 1px solid var(--border); }
.tab { background: transparent; color: var(--muted); border: none; border-bottom: 2px solid transparent; padding: 8px 14px; cursor: pointer; font-size: 13px; }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.pane { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.pane.hidden { display: none; }
.preview-bar { display: flex; align-items: center; gap: 10px; padding: 6px 10px; background: var(--panel); border-bottom: 1px solid var(--border); }
.preview-url { color: var(--muted); font-size: 12px; }
#preview { flex: 1; border: none; width: 100%; background: #fff; }
.files-layout { flex: 1; display: grid; grid-template-columns: 240px 1fr; min-height: 0; }
.filetree { list-style: none; margin: 0; padding: 8px; overflow-y: auto; border-right: 1px solid var(--border); font-size: 13px; }
.filetree li { padding: 4px 6px; border-radius: 6px; cursor: pointer; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.filetree li:hover { background: var(--panel2); color: var(--text); }
.filetree li.active { background: var(--panel2); color: var(--accent); }
.filecontent { margin: 0; padding: 12px; overflow: auto; font-size: 12.5px; font-family: "SF Mono", Consolas, monospace; }