:root {
  --bg: #0b1220;
  --bg2: #0f1830;
  --card: #15203a;
  --card2: #1b2950;
  --line: #243154;
  --text: #e6ecf7;
  --muted: #8a98b8;
  --accent: #35d07f;
  --accent2: #4aa8ff;
  --danger: #ff5c6c;
  --warn: #ffb454;
  --radius: 14px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  overscroll-behavior: none;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* ---------- Setup ---------- */
.setup {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  padding: 24px; background: radial-gradient(1200px 600px at 50% -10%, var(--bg2), var(--bg));
}
.setup-card {
  width: 100%; max-width: 420px; background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; padding: 24px; display: flex; flex-direction: column; gap: 10px;
}
.setup-card h1 { margin: 0; font-size: 28px; }
.setup-card .tabs { display: flex; gap: 6px; background: var(--bg2); border-radius: 10px; padding: 4px; margin: 12px 0 4px; }
.setup-card .tab { flex: 1; padding: 9px; border: none; border-radius: 8px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 600; cursor: pointer; }
.setup-card .tab.on { background: var(--card2); color: var(--text); }
.setup-card label { font-size: 13px; color: var(--muted); margin-top: 8px; }
input, select, textarea {
  width: 100%; background: var(--bg2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; font-size: 16px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent2); }

/* ---------- App layout ---------- */
.app { display: flex; flex-direction: column; height: 100dvh; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: max(env(safe-area-inset-top), 10px) 14px 8px;
  background: var(--bg); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 17px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--danger); box-shadow: 0 0 8px var(--danger); }
.dot.on { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.topinfo { display: flex; align-items: center; gap: 10px; }
.pill { font-size: 12px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); }
.pill.idle { color: var(--muted); }
.pill.running { color: #051; background: var(--accent); border-color: var(--accent); font-weight: 600; }
.icon-btn { background: none; border: none; color: var(--text); font-size: 20px; padding: 4px 6px; }
.subbar { padding: 4px 14px 8px; background: var(--bg); border-bottom: 1px solid var(--line); }

/* ---------- Feed ---------- */
.feed { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 8px; -webkit-overflow-scrolling: touch; }
.entry { border-radius: 12px; padding: 10px 12px; line-height: 1.45; word-break: break-word; white-space: pre-wrap; }
.entry .label { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin-bottom: 3px; }
.entry.user { background: var(--card2); align-self: flex-end; max-width: 88%; }
.entry.assistant { background: var(--card); }
.entry.cmd { background: #0d1526; border: 1px solid var(--line); font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px; }
.entry.thread, .entry.turn { background: transparent; color: var(--muted); font-size: 13px; text-align: center; padding: 4px; }
.entry.error { background: #2a1620; color: var(--danger); border: 1px solid var(--danger); }
.entry.tool, .entry.file { background: #101c33; border: 1px solid var(--line); font-size: 14px; }

/* ---------- Approvals ---------- */
.approvals { padding: 0 12px; display: flex; flex-direction: column; gap: 10px; }
.approval-card {
  background: var(--card); border: 1px solid var(--warn); border-radius: var(--radius);
  padding: 14px; box-shadow: 0 6px 24px rgba(0,0,0,.35); animation: pop .18s ease;
}
@keyframes pop { from { transform: scale(.96); opacity: .4; } to { transform: scale(1); opacity: 1; } }
.approval-card .ac-title { font-weight: 700; color: var(--warn); margin-bottom: 6px; }
.approval-card .ac-cmd { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px; background: #0d1526; border: 1px solid var(--line); border-radius: 8px; padding: 10px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.approval-card .ac-meta { color: var(--muted); font-size: 12px; margin: 8px 0; }
.approval-card .ac-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.approval-card .ac-actions .btn { flex: 1; }

/* ---------- Composer ---------- */
.composer { border-top: 1px solid var(--line); background: var(--bg); padding: 8px 12px max(env(safe-area-inset-bottom), 10px); }
.running-bar { display: flex; align-items: center; justify-content: space-between; padding-bottom: 6px; }
.input-row { display: flex; gap: 8px; align-items: flex-end; }
.input-row textarea { resize: none; max-height: 120px; }
.steer-toggle { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); margin-top: 6px; }
.steer-toggle input { width: auto; }

/* ---------- Buttons ---------- */
.btn { border: 1px solid var(--line); background: var(--card2); color: var(--text); border-radius: 10px; padding: 12px 16px; font-size: 15px; font-weight: 600; cursor: pointer; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); color: #042; border-color: var(--accent); }
.btn.secondary { background: var(--card2); }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn.ghost { background: transparent; color: var(--muted); }
.btn.big { padding: 14px; font-size: 17px; margin-top: 8px; }
.btn.small { padding: 8px 12px; font-size: 13px; }
.btn.full { width: 100%; margin-top: 8px; }

/* ---------- Settings sheet ---------- */
.sheet { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex; align-items: flex-end; z-index: 20; }
.sheet-card { width: 100%; background: var(--card); border-top-left-radius: 20px; border-top-right-radius: 20px; padding: 20px 18px max(env(safe-area-inset-bottom), 18px); display: flex; flex-direction: column; gap: 8px; max-height: 86dvh; overflow-y: auto; }
.sheet-card h2 { margin: 0 0 6px; }
.sheet-card label { font-size: 13px; color: var(--muted); margin-top: 6px; }
.sheet-actions { display: flex; gap: 8px; margin-top: 10px; }
.sheet-actions .btn { flex: 1; }

/* ---------- Diff bar + viewer ---------- */
.diff-bar { margin: 0 12px 8px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--accent2); background: #0d1c33; color: var(--accent2); font-size: 14px; font-weight: 600; text-align: left; cursor: pointer; }
.diff { background: #0d1526; border: 1px solid var(--line); border-radius: 8px; padding: 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; line-height: 1.45; white-space: pre; overflow: auto; max-height: 64dvh; color: var(--text); }

/* ---------- Sessions list ---------- */
.sessions-list { display: flex; flex-direction: column; gap: 8px; margin: 8px 0; }
.session-item { text-align: left; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 12px; cursor: pointer; }
.session-item:active { transform: translateY(1px); }
.session-item .s-name { color: var(--text); font-weight: 600; margin-bottom: 4px; }
.session-item .s-meta { color: var(--muted); font-size: 12px; word-break: break-all; }
.session-item.nested { margin-left: 14px; }
.session-group { padding: 10px 4px 4px; }
.session-group .sg-name { color: var(--accent2); font-weight: 700; font-size: 14px; }
.session-group .sg-count { color: var(--muted); font-weight: 400; font-size: 12px; }
.session-group .sg-path { color: var(--muted); font-size: 11px; word-break: break-all; }