:root {
  color-scheme: dark;
  --bg: #212121;
  --bg-raised: #2f2f2f;
  --bg-hover: #383838;
  --border: #3d3d3d;
  --text: #ececec;
  --text-dim: #a6a6a6;
  --text-faint: #7c7c7c;
  --accent: #10a37f;
  --accent-dim: #0d8a6c;
  --danger: #ef4444;
  --user-bubble: #2f2f2f;
  --assistant-bubble: #212121;
  --radius: 12px;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body, #root { height: 100%; margin: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}
button:disabled { cursor: not-allowed; opacity: 0.5; }

input, textarea, select {
  font: inherit;
  color: var(--text);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}
input:focus, textarea:focus, select:focus { outline: 1px solid var(--accent); }

a { color: var(--text-dim); text-decoration: none; }
a:hover { color: var(--text); }

/* ---------- app shell ---------- */

.app-shell { display: flex; height: 100%; overflow: hidden; }

.sidebar {
  width: 264px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  border-right: 1px solid var(--border);
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  font-weight: 600;
}
.sidebar-header .brand { display: flex; align-items: center; gap: 8px; }
.sidebar-header .brand .logo {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.conn-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.conn-dot.open { background: #22c55e; }
.conn-dot.connecting { background: #eab308; }
.conn-dot.closed { background: var(--danger); }
.new-chat-btn {
  display: block;
  width: calc(100% - 20px);
  margin: 0 10px 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
  color: var(--text);
}
.new-chat-btn:hover { background: var(--bg-hover); }

.sidebar-sessions { flex: 1; overflow-y: auto; padding: 4px 8px 12px; }
.session-link {
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.session-link:hover { background: var(--bg-hover); color: var(--text); }
.session-link.active { background: var(--bg-hover); color: var(--text); }
.sidebar-footer {
  padding: 10px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  align-items: center;
}
.sidebar-footer .spacer { flex: 1; }
.icon-btn {
  padding: 6px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 13px;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.icon-btn.danger:hover { color: var(--danger); }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; overflow: hidden; }

/* ---------- sessions view ---------- */

.page { flex: 1; overflow-y: auto; padding: 24px; max-width: 860px; margin: 0 auto; width: 100%; }
.page h1 { font-size: 20px; margin: 0 0 16px; }
.page .empty { color: var(--text-faint); padding: 40px 0; text-align: center; }

.session-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  cursor: pointer;
  background: var(--bg);
}
.session-card:hover { background: var(--bg-raised); }
.session-card .online-dot {
  width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
  background: #525252;
}
.session-card .online-dot.on { background: #22c55e; }
.session-card .card-body { flex: 1; min-width: 0; }
.session-card .card-title {
  font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.session-card .card-meta {
  font-size: 12px; color: var(--text-faint);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  display: flex; gap: 8px; flex-wrap: wrap;
}
.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  flex-shrink: 0;
}

/* ---------- chat view ---------- */

.chat-layout { flex: 1; display: flex; min-height: 0; }
.chat-col { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-header {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.chat-header .title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-header .sub { font-size: 12px; color: var(--text-faint); }
.chat-header .spacer, .task-col .spacer { flex: 1; }

.chat-scroll { flex: 1; overflow-y: auto; padding: 20px 16px; scroll-behavior: smooth; }
.chat-inner { max-width: 760px; margin: 0 auto; }

.bubble-row { display: flex; margin-bottom: 14px; }
.bubble-row.user { justify-content: flex-end; }
.bubble {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: var(--radius);
  white-space: pre-wrap;
  word-break: break-word;
}
.bubble-row.user .bubble { background: var(--user-bubble); }
.bubble-row.assistant .bubble { background: transparent; padding: 0; max-width: 100%; }
.bubble-row.system .bubble { color: var(--text-faint); font-size: 13px; font-style: italic; }

.bubble .tool-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  margin: 8px 0;
  overflow: hidden;
}
.bubble .tool-card summary {
  cursor: pointer;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 8px;
  list-style: none;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.bubble .tool-card summary::-webkit-details-marker { display: none; }
.bubble .tool-card .tool-body {
  border-top: 1px solid var(--border);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 300px;
  overflow-y: auto;
}
.tool-status-ok { color: var(--accent); }
.tool-status-err { color: var(--danger); }

details.thinking { margin-bottom: 8px; }
details.thinking summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--text-faint);
  list-style: none;
}
details.thinking summary::-webkit-details-marker { display: none; }
details.thinking summary::before { content: "◆ "; }
details.thinking .thinking-body {
  font-size: 13px;
  color: var(--text-faint);
  border-left: 2px solid var(--border);
  padding-left: 10px;
  margin-top: 6px;
  white-space: pre-wrap;
  max-height: 260px;
  overflow-y: auto;
}

.typing {
  display: inline-flex; gap: 4px; align-items: center;
  padding: 8px 0;
}
.typing .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-faint);
  animation: typing-bounce 1.2s infinite;
}
.typing .dot:nth-child(2) { animation-delay: 0.15s; }
.typing .dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

.composer {
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  background: var(--bg);
}
.composer-inner { max-width: 760px; margin: 0 auto; display: flex; gap: 8px; align-items: flex-end; }
.composer textarea {
  flex: 1;
  resize: none;
  max-height: 200px;
  min-height: 42px;
  border-radius: var(--radius);
}
.composer .send-btn {
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 10px 14px;
}
.composer .send-btn:hover { background: var(--accent-dim); }
.composer .send-btn:disabled { background: var(--bg-hover); color: var(--text-faint); }
.composer .abort-btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--danger);
}

/* ---------- task panel ---------- */

.task-col {
  width: 300px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 14px;
  background: var(--bg);
}
.task-col h2 { font-size: 13px; margin: 0 0 8px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; }
.task-col .empty { color: var(--text-faint); font-size: 13px; }
.task-section { margin-bottom: 18px; }

.todo-item { display: flex; gap: 8px; align-items: baseline; font-size: 13px; padding: 3px 0; }
.todo-item .todo-icon { flex-shrink: 0; width: 14px; text-align: center; }
.todo-item .todo-icon.pending { color: var(--text-faint); }
.todo-item .todo-icon.in-progress { color: #eab308; }
.todo-item .todo-icon.completed { color: var(--accent); }
.todo-item.done .todo-text { text-decoration: line-through; color: var(--text-faint); }
.todo-item .todo-text { color: var(--text); }

.subagent-item { font-size: 13px; padding: 4px 0; display: flex; gap: 8px; align-items: center; }
.subagent-item .spinner {
  width: 12px; height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.subagent-item .done-icon { color: var(--accent); flex-shrink: 0; }
.working-line { font-size: 12px; color: var(--text-faint); padding: 3px 0; display: flex; gap: 6px; align-items: center; }

.task-toggle { display: none; }

/* ---------- settings gate ---------- */

.gate {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.gate-card {
  width: 100%;
  max-width: 380px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-raised);
  padding: 28px;
}
.gate-card h1 { font-size: 18px; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; }
.gate-card .sub { color: var(--text-faint); font-size: 13px; margin-bottom: 20px; }
.gate-card label { display: block; font-size: 13px; color: var(--text-dim); margin: 12px 0 4px; }
.gate-card input { width: 100%; }
.gate-card .gate-error { color: var(--danger); font-size: 13px; margin-top: 12px; min-height: 18px; }
.gate-card .gate-submit {
  width: 100%;
  margin-top: 20px;
  padding: 10px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
}

/* ---------- spawn view ---------- */

.spawn-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  background: var(--bg-raised);
}
.spawn-card h2 { font-size: 15px; margin: 0 0 10px; }
.spawn-card input[type="text"], .spawn-card input[type="password"], .spawn-card select { width: 100%; }
.spawn-card .row { display: flex; gap: 10px; }
.spawn-card .row > * { flex: 1; }
.spawn-card .actions { display: flex; gap: 8px; margin-top: 14px; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 8px 16px;
}
.btn-primary:hover { background: var(--accent-dim); }
.btn-primary:disabled { background: var(--bg-hover); color: var(--text-faint); }
.btn-secondary { border: 1px solid var(--border); border-radius: 10px; padding: 8px 16px; }
.btn-secondary:hover { background: var(--bg-hover); }
.error-text { color: var(--danger); font-size: 13px; margin-top: 10px; }

.repo-list { max-height: 420px; overflow-y: auto; }
.repo-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
}
.repo-item:hover { background: var(--bg-hover); }
.repo-item.selected { background: var(--bg-hover); outline: 1px solid var(--accent); }
.repo-item .repo-path { font-weight: 600; }
.repo-item .repo-meta { font-size: 12px; color: var(--text-faint); }

.spawn-job-line { font-size: 13px; color: var(--text-dim); padding: 4px 0; }

/* ---------- toasts ---------- */

.toasts {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}
.toast {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  font-size: 14px;
}

/* ---------- mobile ≤400px ---------- */

@media (max-width: 860px) {
  .task-col { display: none; }
  .task-toggle {
    display: inline-flex;
    align-items: center;
  }
  .mobile-tasks {
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    background: var(--bg-raised);
  }
}

@media (max-width: 700px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    width: 280px;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 40;
  }
  .menu-btn { display: inline-flex !important; }
  .page { padding: 14px; }
  .chat-scroll { padding: 14px 10px; }
  .bubble { max-width: 94%; }
}

@media (max-width: 400px) {
  body { font-size: 14px; }
  .sidebar { width: 100%; }
  .gate-card { padding: 20px; }
  .session-card { padding: 10px; gap: 8px; }
  .composer textarea { font-size: 16px; } /* prevent iOS zoom */
  .composer .send-btn { padding: 10px 12px; }
}