:root {
  color-scheme: light;
  --bg: #eef2f6;
  --sidebar: #111827;
  --sidebar-soft: #1f2937;
  --panel: #ffffff;
  --panel-strong: #f8fafc;
  --text: #111827;
  --muted: #64748b;
  --border: #d7dee8;
  --accent: #1f6feb;
  --accent-strong: #174ea6;
  --ok: #12805c;
  --warn: #b7791f;
  --bad: #b42318;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.simple-page {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px;
}

.simple-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.simple-header h1,
.simple-header p {
  margin: 0;
}

.simple-header h1 {
  font-size: 24px;
}

.simple-header p {
  margin-top: 4px;
  color: var(--muted);
}

.approval-list {
  display: grid;
  gap: 14px;
}

.approval-card {
  display: grid;
  gap: 14px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.approval-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.approval-card h2 {
  margin: 0;
  font-size: 17px;
}

.approval-card-header span {
  padding: 3px 8px;
  border-radius: 999px;
  background: #fef3c7;
  color: #854d0e;
  font-size: 12px;
  font-weight: 800;
}

.approval-meta {
  display: grid;
  gap: 6px;
}

.approval-meta div {
  justify-content: flex-start;
}

.approval-meta dd {
  max-width: none;
  color: var(--text);
}

.approval-action {
  margin: 0;
  max-height: 220px;
  overflow: auto;
  padding: 12px;
  background: #0f172a;
  border-radius: 8px;
  color: #d1fae5;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
}

.approval-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.approval-actions button {
  border: 0;
  border-radius: 8px;
  padding: 9px 12px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 750;
}

.approval-actions button[data-tone="danger"] {
  background: var(--bad);
}

.approval-actions button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.empty-state {
  margin: 0;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
}

button, input, textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100vh;
  padding: 22px;
  background: var(--sidebar);
  color: #e5edf7;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.brand-mark, .avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-weight: 800;
}

.brand-mark {
  background: #f8fafc;
  color: #111827;
}

.brand h1, .brand p,
.chat-header h2, .chat-header p,
.settings-panel h2, .status-panel h2 {
  margin: 0;
}

.brand h1 {
  font-size: 18px;
  line-height: 1.2;
}

.brand p {
  margin-top: 2px;
  color: #9ca3af;
  font-size: 12px;
}

.side-nav {
  display: grid;
  gap: 6px;
}

.side-nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 7px;
  font-size: 14px;
}

.side-nav a:hover,
.side-nav a.active {
  background: var(--sidebar-soft);
  color: #ffffff;
}

.settings-panel,
.status-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 8px;
}

.settings-panel h2,
.status-panel h2 {
  font-size: 13px;
  color: #f8fafc;
}

label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 650;
}

.toggle-row {
  grid-template-columns: auto 1fr;
  align-items: center;
  font-weight: 500;
  color: #cbd5e1;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 12px;
  background: #ffffff;
  color: var(--text);
}

.sidebar input {
  border-color: rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.08);
  color: #ffffff;
}

dl {
  display: grid;
  gap: 9px;
  margin: 0;
}

dl div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

dt {
  color: #9ca3af;
  font-size: 12px;
}

dd {
  margin: 0;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #e5edf7;
  font-size: 12px;
}

[data-tone="ok"] { color: #86efac; }
[data-tone="warn"] { color: #fde68a; }
[data-tone="bad"] { color: #fca5a5; }

.chat-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  gap: 16px;
  min-width: 0;
  height: 100vh;
  padding: 22px;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.chat-header h2 {
  font-size: 20px;
}

.chat-header p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.secondary-button,
.composer button {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 750;
}

.secondary-button {
  background: #edf2f7;
  color: #1f2937;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
  overflow-y: auto;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.message {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 10px;
  max-width: 860px;
}

.message.user {
  align-self: flex-end;
  grid-template-columns: minmax(0, 1fr) 36px;
}

.message.user .avatar {
  grid-column: 2;
  grid-row: 1;
  background: #dbeafe;
  color: #1d4ed8;
}

.message.assistant .avatar {
  background: #e5e7eb;
  color: #111827;
}

.message.user .bubble {
  grid-column: 1;
  grid-row: 1;
  background: #eff6ff;
  border-color: #bfdbfe;
}

.bubble {
  padding: 12px 14px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.bubble p {
  margin: 8px 0 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.5;
}

.message-reasoning {
  display: grid;
  gap: 8px;
  margin-top: 10px;
  padding: 9px 10px;
  background: #f1f5f9;
  border: 1px solid #dbe3ee;
  border-radius: 8px;
}

.message-reasoning.is-collapsed {
  gap: 0;
}

.message-reasoning-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  color: #475569;
  font-size: 12px;
  font-weight: 750;
  text-align: left;
}

.message-reasoning-status {
  flex: 0 0 auto;
  padding: 2px 7px;
  border-radius: 999px;
  background: #e2e8f0;
  color: #64748b;
  font-size: 11px;
}

.message-reasoning pre {
  margin: 0;
  max-height: 220px;
  overflow: auto;
  color: #334155;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.tool-terminal {
  margin-top: 10px;
  overflow: hidden;
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.tool-terminal-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  padding: 8px 10px;
  background: #111827;
  border-bottom: 1px solid #1e293b;
}

.terminal-dots {
  display: flex;
  gap: 5px;
}

.terminal-dots i {
  width: 9px;
  height: 9px;
  border-radius: 999px;
}

.terminal-dots i:nth-child(1) { background: #ef4444; }
.terminal-dots i:nth-child(2) { background: #f59e0b; }
.terminal-dots i:nth-child(3) { background: #22c55e; }

.tool-terminal-title {
  min-width: 0;
  overflow: hidden;
  color: #d1d5db;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-terminal-status {
  padding: 2px 7px;
  border-radius: 999px;
  background: #1d4ed8;
  color: #dbeafe;
  font-size: 11px;
  font-weight: 800;
}

.tool-terminal.is-error .tool-terminal-status {
  background: #7f1d1d;
  color: #fecaca;
}

.tool-terminal.is-waiting .tool-terminal-status {
  background: #854d0e;
  color: #fef3c7;
}

.tool-terminal-body {
  margin: 0;
  max-height: 220px;
  overflow: auto;
  padding: 10px 12px;
  color: #d1fae5;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.tool-approval-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px 12px;
  border-top: 1px solid #1e293b;
  background: #111827;
}

.tool-approval-actions button {
  border: 0;
  border-radius: 7px;
  padding: 8px 10px;
  background: #2563eb;
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
}

.tool-approval-actions button[data-tone="danger"] {
  background: #b42318;
}

.tool-approval-actions button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.message-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
}

.message-meta strong {
  color: var(--text);
  font-size: 13px;
}

.debug-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  min-height: 180px;
}

.debug-column {
  min-width: 0;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.debug-column h3 {
  margin: 0 0 10px;
  font-size: 13px;
}

pre,
#events {
  margin: 0;
  max-height: 170px;
  overflow: auto;
  color: #334155;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

#events {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

#events li strong,
#events li span {
  display: block;
}

#events li span {
  color: var(--muted);
}

.composer {
  display: grid;
  gap: 10px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.composer textarea {
  min-height: 86px;
  resize: vertical;
}

.composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

#composer-hint {
  color: var(--muted);
  font-size: 12px;
}

.composer button {
  min-width: 96px;
  background: var(--accent);
  color: #ffffff;
}

.composer button:hover {
  background: var(--accent-strong);
}

.composer button:disabled {
  cursor: wait;
  opacity: 0.7;
}

[hidden] {
  display: none !important;
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
  }

  .chat-shell {
    height: auto;
    min-height: 100vh;
  }

  .chat-header,
  .debug-panel,
  .composer-actions {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .debug-panel {
    display: grid;
  }
}