/* ── Theme (mirrors main site) ──────────────────── */
:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #22253a;
  --border: #2d3148;
  --text: #e2e8f0;
  --muted: #8892a4;
  --accent: #5ba300;
  --accent-2: #009eb0;
  --accent-3: #7b5ea7;
  --accent-4: #c97a2e;
  --accent-5: #c73e3e;
  --code-bg: #151820;
  --code-text: #c9d1d9;
  --highlight: rgba(91,163,0,0.12);
  --token-system: #7b5ea7;
  --token-agents: #5ba300;
  --token-skills: #c97a2e;
  --token-files: #009eb0;
  --token-tools: #c73e3e;
  --token-prompt: #e2e8f0;
  --token-response: #50a0ff;
}

html[data-theme="light"] {
  --bg: #f8f9fc;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --border: #e2e5ec;
  --text: #1a1d27;
  --muted: #5c6478;
  --accent: #4a8a00;
  --accent-2: #007d8f;
  --accent-3: #6b4e97;
  --accent-4: #b06a20;
  --accent-5: #b33030;
  --code-bg: #f5f7fa;
  --code-text: #24292f;
  --highlight: rgba(91,163,0,0.08);
  --token-system: #6b4e97;
  --token-agents: #4a8a00;
  --token-skills: #b06a20;
  --token-files: #007d8f;
  --token-tools: #b33030;
  --token-prompt: #1a1d27;
  --token-response: #0969da;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ── Layout ────────────────────────────────────── */
.demo-header {
  text-align: center;
  padding: 2rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

.demo-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.demo-header h1 .accent { color: var(--accent-2); }

.demo-header p {
  color: var(--muted);
  font-size: 0.875rem;
  max-width: 600px;
  margin: 0 auto;
}

.demo-header .back-link {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
}

.demo-header .back-link:hover { color: var(--accent-2); }

.demo-layout {
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  grid-template-rows: auto 1fr;
  gap: 0;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── File Tree (left panel) ───────────────────── */
.panel {
  border-right: 1px solid var(--border);
  overflow-y: auto;
  background: var(--surface);
}

.panel-header {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 0.75rem 1rem 0.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.file-tree {
  padding: 0.5rem 0;
  font-size: 0.8rem;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
}

.file-tree-item {
  padding: 0.3rem 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text);
  transition: background 0.1s;
  white-space: nowrap;
}

.file-tree-item:hover { background: var(--highlight); }

.file-tree-item.active {
  background: var(--highlight);
  color: var(--accent);
  font-weight: 500;
}

.file-tree-item.dir { color: var(--muted); font-weight: 500; }

.file-tree-item .icon {
  font-size: 0.75rem;
  width: 1.1em;
  text-align: center;
  flex-shrink: 0;
}

.indent-1 { padding-left: 2rem; }
.indent-2 { padding-left: 3rem; }
.indent-3 { padding-left: 4rem; }

/* ── Center panel (main area) ─────────────────── */
.center-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

/* Tabs */
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.tab {
  padding: 0.6rem 1.25rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  user-select: none;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent-2); border-bottom-color: var(--accent-2); }

/* File viewer */
.file-viewer {
  flex: 1;
  overflow: auto;
  display: none;
  padding: 0;
}

.file-viewer.active { display: block; }

.file-viewer pre {
  margin: 0;
  padding: 1rem;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.78rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--code-text);
}

.file-viewer pre .line-num {
  display: inline-block;
  width: 3ch;
  text-align: right;
  margin-right: 1.5ch;
  color: var(--muted);
  opacity: 0.5;
  user-select: none;
}

/* Prompt area */
.prompt-area {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 0.75rem 1rem;
  flex-shrink: 0;
  display: none;
}

.prompt-area.active { display: block; }

.prompt-input-row {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.prompt-input {
  flex: 1;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.82rem;
  padding: 0.6rem 0.8rem;
  resize: none;
  min-height: 2.5rem;
  max-height: 6rem;
  line-height: 1.5;
}

.prompt-input::placeholder { color: var(--muted); }
.prompt-input:focus { outline: none; border-color: var(--accent-2); }

.run-btn {
  background: var(--accent-2);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.run-btn:hover { opacity: 0.9; }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.preset-prompts {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.preset-btn {
  font-size: 0.7rem;
  color: var(--muted);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.preset-btn:hover { border-color: var(--accent-2); color: var(--accent-2); }

/* Agentic loop display */
.loop-viewer {
  flex: 1;
  overflow-y: auto;
  display: none;
  padding: 1rem;
}

.loop-viewer.active { display: block; }

/* ── Network viewer (DevTools-style) ──────────── */
.network-viewer {
  flex: 1;
  overflow-y: auto;
  display: none;
  font-size: 0.78rem;
}

.network-viewer.active { display: flex; flex-direction: column; }

.network-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.72rem;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 2;
}

.network-toolbar-label { color: var(--text); }
.network-summary { color: var(--muted); font-weight: 400; }

.network-format-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.net-format-btn {
  padding: 0.25rem 0.6rem;
  background: var(--bg);
  border: none;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.net-format-btn:not(:last-child) {
  border-right: 1px solid var(--border);
}

.net-format-btn:hover { color: var(--text); }

.net-format-btn.active {
  background: var(--accent-2);
  color: #fff;
}

.network-header-row {
  display: flex;
  align-items: center;
  padding: 0.35rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  position: sticky;
  top: 33px;
  z-index: 1;
}

.net-col { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.net-col-status { width: 30px; text-align: center; flex-shrink: 0; }
.net-col-method { width: 60px; flex-shrink: 0; }
.net-col-url { flex: 1; min-width: 0; }
.net-col-status-code { width: 55px; text-align: center; flex-shrink: 0; }
.net-col-size { width: 65px; text-align: right; flex-shrink: 0; }
.net-col-time { width: 65px; text-align: right; flex-shrink: 0; }

.network-rows { flex: 1; overflow-y: auto; }

.network-row {
  border-bottom: 1px solid var(--border);
  animation: fadeSlideIn 0.25s ease-out;
}

.network-row-summary {
  display: flex;
  align-items: center;
  padding: 0.45rem 1rem;
  cursor: pointer;
  transition: background 0.15s;
}

.network-row-summary:hover {
  background: var(--highlight);
}

.network-row.expanded .network-row-summary {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.net-method-badge {
  display: inline-block;
  background: var(--accent-2);
  color: #fff;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.net-status-ok { color: var(--accent); font-weight: 600; }
.net-status-err { color: var(--accent-5); font-weight: 600; }

.network-row-detail {
  background: var(--code-bg);
  border-top: 1px solid var(--border);
}

.net-detail-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.net-detail-tab {
  padding: 0.4rem 0.8rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.7rem;
  font-family: inherit;
  transition: all 0.15s;
}

.net-detail-tab:hover { color: var(--text); }

.net-detail-tab.active {
  color: var(--accent-2);
  border-bottom-color: var(--accent-2);
}

.net-detail-body {
  padding: 0.75rem 1rem;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--code-text);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 350px;
  overflow-y: auto;
  margin: 0;
}

.loop-step {
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  animation: fadeSlideIn 0.35s ease-out;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.loop-step-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.loop-step-header .step-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

.step-icon.system  { background: rgba(123,94,167,0.15); color: var(--token-system); }
.step-icon.agents  { background: rgba(91,163,0,0.15); color: var(--token-agents); }
.step-icon.skill   { background: rgba(201,122,46,0.15); color: var(--token-skills); }
.step-icon.file    { background: rgba(0,158,176,0.15); color: var(--token-files); }
.step-icon.tool    { background: rgba(199,62,62,0.15); color: var(--token-tools); }
.step-icon.prompt  { background: rgba(226,232,240,0.1); color: var(--token-prompt); }
.step-icon.model   { background: rgba(80,160,255,0.15); color: var(--token-response); }

.loop-step-body {
  padding: 0.6rem 0.8rem;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.73rem;
  line-height: 1.6;
  color: var(--code-text);
  background: var(--code-bg);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.loop-step-body.collapsed {
  max-height: 60px;
  position: relative;
  cursor: pointer;
}

.loop-step-body.collapsed::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30px;
  background: linear-gradient(transparent, var(--code-bg));
}

.loop-step .token-badge {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--surface-2);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

/* Sub-agent (swarm) steps */
.loop-step.sub-agent {
  margin-left: 1.5rem;
  border-left: 3px solid var(--token-skills);
  border-color: #c17aff;
  position: relative;
}

.loop-step.sub-agent::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 1rem;
  width: 1.2rem;
  height: 0;
  border-top: 2px dashed rgba(193, 122, 255, 0.4);
}

.step-icon.subagent {
  background: rgba(193,122,255,0.18);
  color: #c17aff;
}

.loop-step.sub-agent .loop-step-header {
  background: rgba(193,122,255,0.06);
}

.sub-agent-label {
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #c17aff;
  background: rgba(193,122,255,0.12);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-left: 0.3rem;
}

.sub-agent-children {
  margin: 0 0 0 1rem;
  padding: 0.4rem 0 0 0;
}

.sub-agent-child {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.68rem;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  color: var(--muted);
  border-left: 1px solid var(--border);
  margin-left: 0.3rem;
}

.sub-agent-child-icon {
  flex-shrink: 0;
  opacity: 0.6;
}

.sub-agent-child-text {
  line-height: 1.5;
}

/* Tool call diff display */
.tool-diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.tool-diff .diff-before,
.tool-diff .diff-after {
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.5rem;
  overflow-x: auto;
  border: 1px solid var(--border);
}

.tool-diff .diff-before {
  border-left: 3px solid var(--accent-5);
}

.tool-diff .diff-after {
  border-left: 3px solid var(--accent);
}

.tool-diff .diff-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
  color: var(--muted);
}

.tool-diff .diff-before .diff-label { color: var(--accent-5); }
.tool-diff .diff-after .diff-label { color: var(--accent); }

.tool-diff pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--code-text);
}

@media (max-width: 768px) {
  .tool-diff {
    grid-template-columns: 1fr;
  }
}

/* Typing indicator */
.typing-indicator {
  display: inline-flex;
  gap: 3px;
  align-items: center;
  padding: 0.3rem 0;
}

.typing-indicator span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: typingBounce 1.2s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

/* ── Right panel (context breakdown) ──────────── */
.context-panel {
  border-left: 1px solid var(--border);
  overflow-y: auto;
  background: var(--surface);
  padding: 0;
}

.context-bar-labels {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 0 1rem;
}
.context-bar-labels:first-of-type { margin-top: 1rem; }

.context-bar-mode {
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.context-window-bar {
  margin: 0.25rem 1rem 0.5rem;
  background: var(--code-bg);
  border-radius: 8px;
  overflow: hidden;
  height: 22px;
  display: flex;
  position: relative;
}

.context-window-bar.zoomed {
  height: 28px;
  margin-bottom: 0.75rem;
}

.context-window-bar .segment {
  height: 100%;
  transition: width 0.5s ease, opacity 0.2s ease;
  position: relative;
  cursor: pointer;
}

.context-window-bar .segment:hover {
  filter: brightness(1.3);
}

/* Tooltip on hover */
.context-window-bar .segment[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.68rem;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.context-window-bar .segment.system  { background: var(--token-system); }
.context-window-bar .segment.agents  { background: var(--token-agents); }
.context-window-bar .segment.skills  { background: var(--token-skills); }
.context-window-bar .segment.files   { background: var(--token-files); }
.context-window-bar .segment.tools   { background: var(--token-tools); }
.context-window-bar .segment.prompt  { background: var(--token-prompt); opacity: 0.6; }
.context-window-bar .segment.response { background: var(--token-response); }
.context-window-bar .segment.empty   { background: transparent; cursor: default; }

/* Dimmed state when a category is selected */
.context-window-bar .segment.dimmed { opacity: 0.15; }
.context-window-bar .segment.highlighted { opacity: 1; filter: brightness(1.2); }

.context-limit-label {
  font-size: 0.68rem;
  color: var(--muted);
  text-align: right;
}

.context-legend {
  padding: 0 1rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0;
  font-size: 0.78rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}

.legend-item:hover { background: var(--highlight); margin: 0 -1rem; padding-left: 1rem; padding-right: 1rem; }

.legend-item.active {
  background: var(--highlight);
  margin: 0 -1rem;
  padding-left: 1rem;
  padding-right: 1rem;
  border-left: 3px solid var(--accent-2);
}

.legend-item.dimmed { opacity: 0.35; }

.legend-item:last-child { border-bottom: none; }

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
}

.legend-dot.system  { background: var(--token-system); }
.legend-dot.agents  { background: var(--token-agents); }
.legend-dot.skills  { background: var(--token-skills); }
.legend-dot.files   { background: var(--token-files); }
.legend-dot.tools   { background: var(--token-tools); }
.legend-dot.prompt  { background: var(--token-prompt); opacity: 0.6; }
.legend-dot.response { background: var(--token-response); }

.legend-label { flex: 1; font-size: 0.8rem; color: var(--text); }

.legend-tokens {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.7rem;
  color: var(--muted);
}

.legend-pct {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.7rem;
  color: var(--muted);
  width: 3.5ch;
  text-align: right;
}

/* ── Sampler / model settings panel ──────────── */
.sampler-panel {
  margin: 0.75rem 1rem 0;
  background: var(--code-bg);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
}

.sampler-header {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.sampler-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.3rem 0.6rem;
  align-items: center;
}

.sampler-label {
  font-size: 0.72rem;
  color: var(--muted);
}

.sampler-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.72rem;
  padding: 0.25rem 0.4rem;
  font-family: "SF Mono", "Fira Code", monospace;
  text-align: right;
  width: 100%;
}

.sampler-input:focus { outline: none; border-color: var(--accent-2); }

.sampler-input[readonly] {
  opacity: 0.6;
  cursor: default;
  border-color: transparent;
  background: transparent;
}

/* Hide number input spinners */
.sampler-input::-webkit-inner-spin-button,
.sampler-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  appearance: none;
  margin: 0;
}
.sampler-input { -moz-appearance: textfield; appearance: textfield; }

.token-estimate-caveat {
  font-size: 0.62rem;
  color: var(--muted);
  text-align: center;
  margin: 0.5rem 1rem 0;
  font-style: italic;
}

/* How it works summary */
.how-it-works {
  margin: 1rem;
  padding: 0.8rem;
  background: var(--code-bg);
  border-radius: 8px;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
}

.how-it-works h3 {
  font-size: 0.78rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.how-it-works ol {
  padding-left: 1.2rem;
}

.how-it-works li {
  margin-bottom: 0.25rem;
}

/* ── Status bar ───────────────────────────────── */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  color: var(--muted);
  grid-column: 1 / -1;
}

.status-bar .status-left { display: flex; gap: 1rem; align-items: center; }
.status-bar .status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--muted);
  margin-right: 0.3rem;
  display: inline-block;
}

.status-bar .status-dot.ready { background: var(--accent); }
.status-bar .status-dot.running { background: var(--accent-2); animation: pulse 1.5s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Theme toggle ─────────────────────────────── */
.theme-toggle {
  position: fixed;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 1000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.5rem;
  cursor: pointer;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1;
  transition: border-color 0.2s;
}

.theme-toggle:hover { border-color: var(--accent-2); }

/* ── Responsive ───────────────────────────────── */
@media (max-width: 1024px) {
  .demo-layout {
    grid-template-columns: 220px 1fr 260px;
  }
}

@media (max-width: 768px) {
  html, body {
    overflow: auto;
    height: auto;
  }

  .demo-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    flex: none;
    overflow: visible;
  }

  .panel { border-right: none; border-bottom: 1px solid var(--border); max-height: 200px; }
  .context-panel { border-left: none; border-top: 1px solid var(--border); max-height: 300px; }
  .center-panel { min-height: 400px; }
}

/* ── Repo loader / selector ───────────────────── */
.repo-loader {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.repo-select {
  width: 100%;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: 0.75rem;
  padding: 0.35rem 0.6rem;
  font-family: "Inter", sans-serif;
  cursor: pointer;
}

.repo-select:focus { outline: none; border-color: var(--accent-2); }

.repo-github-input {
  display: flex;
  gap: 0.4rem;
}

.repo-input {
  flex: 1;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: 0.75rem;
  padding: 0.35rem 0.6rem;
  font-family: "SF Mono", "Fira Code", monospace;
}

.repo-input::placeholder { color: var(--muted); }
.repo-input:focus { outline: none; border-color: var(--accent-2); }

.load-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  font-size: 0.7rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  font-weight: 500;
}

.load-btn:hover { color: var(--accent-2); border-color: var(--accent-2); }

/* ── Controls bar (LLM mode + speed) ─────────── */
.controls-bar {
  display: flex;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.control-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.control-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.control-select {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: 0.73rem;
  padding: 0.3rem 0.5rem;
  font-family: "Inter", sans-serif;
  cursor: pointer;
}

.control-select:focus { outline: none; border-color: var(--accent-2); }

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.speed-range {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

.speed-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-2);
  cursor: pointer;
}

.speed-range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-2);
  cursor: pointer;
  border: none;
}

.speed-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-2);
  min-width: 2.5ch;
  text-align: right;
  font-family: "SF Mono", "Fira Code", monospace;
}

/* ── API config panel ─────────────────────────── */
.api-config, .webllm-config {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.api-input {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-size: 0.73rem;
  padding: 0.35rem 0.6rem;
  font-family: "SF Mono", "Fira Code", monospace;
  width: 100%;
}

.api-input::placeholder { color: var(--muted); }
.api-input:focus { outline: none; border-color: var(--accent-2); }

.api-hint {
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.4;
}

.webllm-load-btn {
  width: 100%;
  padding: 0.45rem;
  text-align: center;
  font-weight: 600;
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.webllm-advanced {
  margin-top: 0.4rem;
}

.webllm-advanced summary {
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--muted);
  user-select: none;
}

.webllm-advanced summary:hover { color: var(--accent-2); }

.webllm-advanced[open] summary { margin-bottom: 0.4rem; }

.webllm-advanced .api-input { margin-top: 0.3rem; }

.webllm-progress {
  position: relative;
  height: 22px;
  background: var(--code-bg);
  border-radius: 5px;
  overflow: hidden;
}

.webllm-progress-bar {
  height: 100%;
  background: var(--accent-2);
  transition: width 0.3s;
  width: 0%;
}

.webllm-progress-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text);
}

/* ── Highlight lines in code viewer ───────────── */
.file-viewer pre .highlighted-line {
  background: var(--highlight);
  display: block;
  margin: 0 -1rem;
  padding: 0 1rem;
}

/* ── Scrollbar styling ────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Inline model label ───────────────────────── */
.model-label {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent-2);
  background: rgba(0,158,176,0.1);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  margin-left: 0.3rem;
  vertical-align: middle;
}

/* ── Prism syntax highlighting tokens ─────────── */
/* Dark theme (default) */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata            { color: #6a737d; font-style: italic; }
.token.keyword,
.token.operator,
.token.boolean          { color: #79c0ff; }
.token.string,
.token.char,
.token.template-string  { color: #a5d6ff; }
.token.number           { color: #ffa657; }
.token.function         { color: #d2a8ff; }
.token.class-name       { color: #ffa657; }
.token.builtin          { color: #79c0ff; }
.token.punctuation      { color: #8b949e; }
.token.property         { color: #7ee787; }
.token.attr-name        { color: #7ee787; }
.token.attr-value       { color: #a5d6ff; }
.token.tag              { color: #7ee787; }
.token.selector         { color: #7dd3a8; }
.token.annotation       { color: #ffa657; }
.token.regex            { color: #7dd3a8; }
.token.important,
.token.bold             { font-weight: bold; }
.token.italic           { font-style: italic; }

/* Light theme overrides */
[data-theme="light"] .token.comment,
[data-theme="light"] .token.prolog,
[data-theme="light"] .token.doctype,
[data-theme="light"] .token.cdata            { color: #6e7781; }
[data-theme="light"] .token.keyword,
[data-theme="light"] .token.operator,
[data-theme="light"] .token.boolean          { color: #0550ae; }
[data-theme="light"] .token.string,
[data-theme="light"] .token.char,
[data-theme="light"] .token.template-string  { color: #0a3069; }
[data-theme="light"] .token.number           { color: #953800; }
[data-theme="light"] .token.function         { color: #8250df; }
[data-theme="light"] .token.class-name       { color: #953800; }
[data-theme="light"] .token.builtin          { color: #0550ae; }
[data-theme="light"] .token.punctuation      { color: #24292f; }
[data-theme="light"] .token.property         { color: #116329; }
[data-theme="light"] .token.attr-name        { color: #116329; }
[data-theme="light"] .token.attr-value       { color: #0a3069; }
[data-theme="light"] .token.tag              { color: #116329; }
[data-theme="light"] .token.selector         { color: #0550ae; }
[data-theme="light"] .token.annotation       { color: #953800; }
[data-theme="light"] .token.regex            { color: #116329; }

/* ── Response rendering ────────────────────────── */
.loop-step-body.rendered { white-space: normal; }

.response-text {
  white-space: pre-wrap;
  word-break: break-word;
  display: block;
}

.response-code-block {
  margin: 0.4rem 0;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.code-lang-label {
  display: block;
  padding: 0.15rem 0.6rem;
  font-size: 0.63rem;
  background: var(--surface);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}

.response-code-block pre {
  margin: 0;
  padding: 0.5rem 0.6rem;
  background: var(--code-bg);
  overflow-x: auto;
  white-space: pre;
  word-break: normal;
}

.response-code-block pre code {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--code-text);
}

/* ── Reduced motion ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .loop-step { animation: none; }
  .typing-indicator span { animation: none; opacity: 0.6; }
  .status-bar .status-dot.running { animation: none; opacity: 0.7; }
  .context-window-bar .segment { transition: none; }
  * { scroll-behavior: auto !important; }
}