:root {
  --bg: #0b0d10;
  --panel: #12151a;
  --panel-2: #171b21;
  --line: #23282f;
  --fg: #dfe4ea;
  --muted: #7d8894;
  --accent: #6aa8ff;
  --ok: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

code, pre { font-family: var(--mono); font-size: 12.5px; }
.muted { color: var(--muted); }
.grow { flex: 1; }

/* ---- top bar ---- */
.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  min-height: 50px;
}
.bar .title { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.bar .title strong { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar .title span { font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
}
.pill.on { color: var(--ok); border-color: #1f4d2a; }
.pill.off { color: var(--bad); border-color: #54211f; }
.icon {
  background: none; border: 1px solid var(--line); color: var(--fg);
  border-radius: 8px; width: 34px; height: 34px; cursor: pointer;
  display: none;
}

/* ---- layout ---- */
main { flex: 1; display: flex; min-height: 0; }
.sessions {
  width: 290px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  background: var(--panel);
  flex: 0 0 auto;
}
.pane { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }

/* ---- session list ---- */
.sess {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.sess:hover { background: var(--panel-2); }
.sess.sel { background: #1b2430; box-shadow: inset 2px 0 0 var(--accent); }
.sess .top { display: flex; align-items: center; gap: 6px; }
.sess .name { font-weight: 600; font-size: 13px; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sess .sub { font-size: 11.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sess .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: 0 0 auto; }
.dot.running { background: var(--accent); animation: pulse 1.4s infinite; }
.dot.awaiting_approval { background: var(--warn); }
.dot.idle { background: var(--ok); }
.dot.dead { background: #3a4048; }
@keyframes pulse { 50% { opacity: 0.35; } }

/* ---- approvals ---- */
.approvals { display: flex; flex-direction: column; gap: 8px; padding: 0 12px; }
.approvals:not(:empty) { padding: 12px; border-bottom: 1px solid var(--line); }
.approval {
  border: 1px solid var(--warn);
  background: #1d1a0f;
  border-radius: 10px;
  padding: 10px 12px;
}
.approval .head { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--warn); }
.approval .head .tool { font-family: var(--mono); color: var(--fg); font-weight: 600; }
.approval pre {
  margin: 8px 0;
  padding: 8px;
  background: #0e1013;
  border-radius: 8px;
  max-height: 180px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.approval .actions { display: flex; gap: 8px; }
.approval .actions button { flex: 1; }
.approval .left { margin-left: auto; font-size: 11px; color: var(--muted); }

/* ---- timeline ---- */
.timeline { flex: 1; overflow-y: auto; padding: 14px 12px 6px; display: flex; flex-direction: column; gap: 10px; }
.empty { text-align: center; margin-top: 18vh; }

.msg { display: flex; flex-direction: column; gap: 4px; max-width: 100%; }
.msg .who { font-size: 11px; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }
.msg .body { white-space: pre-wrap; word-break: break-word; }
.msg.user .body {
  background: #1b2230;
  border: 1px solid #263247;
  border-radius: 10px;
  padding: 8px 10px;
}
.msg.reasoning .body {
  color: var(--muted);
  font-size: 13px;
  border-left: 2px solid var(--line);
  padding-left: 10px;
  max-height: 160px;
  overflow: auto;
}

.tool { border: 1px solid var(--line); border-radius: 10px; background: var(--panel); overflow: hidden; }
.tool > summary {
  cursor: pointer;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  list-style: none;
}
.tool > summary::-webkit-details-marker { display: none; }
.tool .tname { font-family: var(--mono); font-weight: 600; }
.tool .targs { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; font-family: var(--mono); font-size: 12px; }
.tool .tstatus { font-size: 11px; color: var(--muted); }
.tool .tstatus.ok { color: var(--ok); }
.tool .tstatus.error { color: var(--bad); }
.tool pre {
  margin: 0;
  padding: 10px;
  border-top: 1px solid var(--line);
  background: #0e1013;
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.tool .more { padding: 6px 10px; border-top: 1px solid var(--line); }
.tool .more button { font-size: 12px; }

.err { color: var(--bad); font-size: 12.5px; }

/* ---- composer ---- */
.composer { border-top: 1px solid var(--line); padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: var(--panel); }
.composer .row { display: flex; gap: 8px; align-items: center; }
.composer .row + .row { margin-top: 8px; }
textarea {
  flex: 1;
  resize: none;
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
  min-height: 44px;
  max-height: 160px;
}
select, input {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 8px;
  font: inherit;
}
button {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 8px 14px;
  font: inherit;
  cursor: pointer;
}
button:hover { border-color: #39414b; }
button.primary { background: #1f4d8f; border-color: #2b62b3; }
button.ok { background: #17381f; border-color: #2a5d35; color: #b7f0c2; }
button.danger { background: #3a1a18; border-color: #6a2a26; color: #ffb4ad; }
button:disabled { opacity: 0.45; cursor: default; }

/* ---- pairing overlay ---- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 9, 0.9);
  display: grid;
  place-items: center;
  z-index: 20;
  padding: 20px;
}
.overlay[hidden] { display: none; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  width: min(420px, 100%);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card h1 { font-size: 16px; margin: 0; }
.card p { margin: 0; font-size: 13px; }
.card .error { color: var(--bad); font-size: 12.5px; min-height: 18px; }

/* ---- mobile ---- */
@media (max-width: 720px) {
  .icon { display: block; }
  .sessions {
    position: fixed;
    top: 50px;
    bottom: 0;
    left: 0;
    z-index: 15;
    width: min(86vw, 320px);
    transform: translateX(-102%);
    transition: transform 0.18s ease;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.6);
  }
  body.list-open .sessions { transform: none; }
  .bar .title span { display: none; }
}