*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --nav-height: 56px;
  --bg: #f4f4f5;
  --surface: #ffffff;
  --surface-raised: #fafafa;
  --fg: #111111;
  --muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --hover: #f3f4f6;
  --active: #111111;
  --active-fg: #ffffff;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --danger-fg: #b91c1c;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "Consolas", "Liberation Mono", monospace;
}

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

body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

/* ── Navbar ─────────────────────────────────────────── */

.navbar {
  flex-shrink: 0;
  height: var(--nav-height);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 100%;
  max-width: 100%;
  padding: 0 16px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: inherit;
  text-decoration: none;
}

.navbar-brand:hover .logo {
  opacity: 0.85;
}

.navbar-prompt .navbar-inner {
  justify-content: flex-start;
}

body.prompt-page .welcome {
  flex: 1;
}

.logo {
  font-family: "Syne", var(--font);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.navbar-search {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 8px;
  min-width: 0;
  max-width: 520px;
}

.navbar-search input[type="text"] {
  flex: 1;
  min-width: 0;
  height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface-raised);
  padding: 0 12px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.navbar-search input[type="text"]:focus {
  border-color: var(--fg);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Buttons ────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 0 12px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.btn:hover:not(:disabled) {
  background: var(--hover);
  border-color: var(--border-strong);
  color: var(--fg);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  height: 36px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--fg);
  color: var(--active-fg);
  font-size: 13px;
}

.btn-primary:hover:not(:disabled) {
  background: #333;
  color: var(--active-fg);
}

.btn-ghost {
  border-color: transparent;
  background: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--hover);
  border-color: transparent;
}

.btn-secure {
  gap: 6px;
  padding: 0 10px;
}

.icon-secure {
  flex-shrink: 0;
  opacity: 0.7;
}

.icon-secure-check {
  flex-shrink: 0;
  display: none;
  color: #16a34a;
}

.btn-secure.is-connected .icon-secure {
  opacity: 1;
}

.btn-secure.is-connected .icon-secure-check {
  display: block;
}

.btn-sm {
  height: 28px;
  padding: 0 10px;
  font-size: 11px;
  border-radius: var(--radius-sm);
}

.replay-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}

.replay-sliders {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 240px;
}

.replay-slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.replay-slider-label {
  flex-shrink: 0;
  width: 52px;
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
}

.replay-controls input[type="range"],
.replay-slider-row input[type="range"] {
  flex: 1;
  min-width: 200px;
  width: auto;
  accent-color: var(--fg);
}

#speed-label,
#progress-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  min-width: 40px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

#speed-label {
  min-width: 52px;
}

/* ── Error ──────────────────────────────────────────── */

.error-banner {
  flex-shrink: 0;
  padding: 10px 16px;
  background: var(--danger-bg);
  border-bottom: 1px solid var(--danger-border);
  color: var(--danger-fg);
  font-size: 13px;
}

/* ── Welcome ────────────────────────────────────────── */

.welcome {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 40px 20px;
}

.welcome-screen {
  width: 100%;
  max-width: 440px;
  text-align: center;
}

.welcome-screen.hidden {
  display: none;
}

.welcome-heading {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.welcome-lead {
  margin: 10px auto 0;
  max-width: 340px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--muted);
}

.welcome-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
}

.welcome-bar input[type="password"],
.welcome-bar input[type="text"] {
  flex: 1;
  min-width: 0;
  height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0 14px;
  font-family: var(--mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.welcome-bar input[type="password"]:focus,
.welcome-bar input[type="text"]:focus {
  border-color: var(--fg);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.06);
}

.welcome-bar .btn-primary {
  flex-shrink: 0;
  height: 44px;
  min-width: 88px;
  padding: 0 20px;
}

.welcome-note {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.welcome-note a {
  color: var(--fg);
  text-decoration: none;
}

.welcome-note a:hover {
  text-decoration: underline;
}

.welcome-link-btn {
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  color: var(--fg);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.welcome-link-btn:hover {
  opacity: 0.8;
}

.welcome-back {
  margin-top: 20px;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s ease;
}

.welcome-back:hover {
  color: var(--fg);
}

/* ── Workspace ──────────────────────────────────────── */

.workspace {
  display: flex;
  flex: 1;
  min-height: 0;
  padding: 12px;
  gap: 0;
  --flex-files: 0.45;
  --flex-code: 1.275;
  --flex-preview: 1.275;
}

@media (max-width: 900px) {
  .workspace {
    flex-direction: column;
  }
}

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.panel-files {
  flex: var(--flex-files) 1 0;
  min-width: 88px;
  max-width: 220px;
}

.panel-code {
  flex: var(--flex-code) 1 0;
  min-width: 140px;
}

.panel-preview {
  flex: var(--flex-preview) 1 0;
  min-width: 140px;
}

@media (max-width: 900px) {
  .panel-files,
  .panel-code,
  .panel-preview {
    min-width: 0;
    min-height: 100px;
  }
}

/* Resize handles */
.resize-handle {
  flex: 0 0 10px;
  position: relative;
  background: transparent;
  border: none;
  cursor: col-resize;
  touch-action: none;
  user-select: none;
  z-index: 2;
}

.resize-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 40px;
  background: var(--border-strong);
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s ease, background 0.15s ease;
}

.resize-handle:hover::after,
.resize-handle.dragging::after {
  opacity: 1;
  background: var(--muted);
}

.resize-handle-v {
  flex: 0 0 10px;
  width: 100%;
  cursor: row-resize;
}

.resize-handle-v::after {
  width: 40px;
  height: 4px;
}

.resize-handle-h {
  flex: 0 0 10px;
  height: auto;
  align-self: stretch;
  cursor: col-resize;
}

body.is-resizing-v {
  cursor: row-resize;
  user-select: none;
}

body.is-resizing-h {
  cursor: col-resize;
  user-select: none;
}

body.is-resizing {
  cursor: col-resize;
  user-select: none;
}

@media (max-width: 900px) {
  .resize-handle {
    cursor: row-resize;
  }

  body.is-resizing {
    cursor: row-resize;
  }
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  height: 42px;
  padding: 0 14px;
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
}

.panel-meta {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 55%;
  font-size: 11px;
  font-family: var(--mono);
}

.panel-head-end {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  margin-left: auto;
}

.panel-head-preview .panel-meta {
  max-width: 240px;
}

.btn-icon {
  width: 28px;
  height: 28px;
  padding: 0;
  flex-shrink: 0;
}

.panel-preview:fullscreen {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  max-width: none;
  min-width: 0;
  flex: none;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

.panel-preview:fullscreen .preview-wrap {
  background: var(--surface);
}

.preview-building {
  position: absolute;
  bottom: 14px;
  left: 50%;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.84);
  color: #ffffff;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  pointer-events: none;
  transform: translateX(-50%);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
}

.preview-building.hidden {
  display: none;
}

.preview-building-spinner {
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.28);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: preview-building-spin 0.7s linear infinite;
}

@keyframes preview-building-spin {
  to {
    transform: rotate(360deg);
  }
}

.preview-replay-dock {
  display: none;
  flex-shrink: 0;
}

.panel-preview:fullscreen .preview-replay-dock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface-raised);
}

.panel-preview:fullscreen .preview-replay-dock:empty {
  display: none;
}

.panel-preview:fullscreen .preview-replay-dock .replay-controls {
  border-left: none;
  padding-left: 0;
}

.panel-preview:fullscreen .preview-replay-dock .replay-sliders {
  min-width: 300px;
}

/* ── File tree ──────────────────────────────────────── */

.file-tree {
  flex: 1 1 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px;
  min-height: 0;
  overscroll-behavior: contain;
}

.file-tree button {
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  color: inherit;
}

.tree-folder {
  display: block;
}

.tree-folder-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  border: none;
  background: var(--surface-raised);
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  text-align: left;
  color: var(--fg);
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background 0.1s ease;
}

.tree-folder-toggle:hover {
  background: var(--hover);
}

.tree-chevron {
  flex-shrink: 0;
  width: 16px;
  font-size: 10px;
  line-height: 1;
  color: var(--muted);
  text-align: center;
}

.tree-chevron::before {
  content: "▾";
  display: inline-block;
}

.tree-folder-collapsed .tree-chevron::before {
  content: "▸";
}

.tree-folder-children {
  display: block;
  padding-top: 1px;
}

.tree-folder-collapsed .tree-folder-children {
  display: none;
}

.tree-folder-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-file {
  display: block;
  width: 100%;
  border: none;
  background: transparent;
  padding: 5px 10px;
  margin: 0;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12px;
  text-align: left;
  color: var(--fg);
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  outline: none;
  transition: background 0.1s ease, color 0.1s ease;
}

.tree-file:focus-visible {
  background: var(--hover);
}

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

.tree-file.selected {
  background: var(--hover);
  color: var(--fg);
  font-weight: 500;
}

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

.tree-file.replay-all-current,
.tree-file.generating-current {
  background: var(--fg);
  color: var(--surface);
  font-weight: 600;
}

.tree-file.replay-all-current:hover,
.tree-file.replay-all-current:focus-visible,
.tree-file.generating-current:hover,
.tree-file.generating-current:focus-visible {
  background: var(--fg);
  color: var(--surface);
}

.tree-file.race-leader {
  font-weight: 600;
}

.tree-file.race-leader::before {
  content: "▶ ";
}

.tree-file.race-done {
  color: var(--muted);
}

/* ── Timeline ───────────────────────────────────────── */

.timeline {
  border-top: 1px solid var(--border);
  padding: 10px 12px;
  flex-shrink: 0;
  background: var(--surface-raised);
}

.timeline.hidden {
  display: none;
}

.timeline-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

#step-counter {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
}

.step-info {
  margin: 0 0 8px;
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-lists {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 4px;
}

.mini-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mini-item {
  border: none;
  background: none;
  padding: 2px 0;
  font-family: var(--mono);
  font-size: 10px;
  text-align: left;
  color: var(--muted);
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.1s ease;
}

.mini-item:hover {
  color: var(--fg);
}

.mini-item.static {
  cursor: default;
}

.mini-item.static:hover {
  color: var(--muted);
}

.mini-empty {
  font-size: 10px;
  color: #9ca3af;
  font-style: italic;
}

/* ── Code viewer ────────────────────────────────────── */

.code-split-layout {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}

.code-file-tabs {
  display: flex;
  gap: 4px;
  padding: 6px 8px;
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.code-file-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  max-width: 180px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  padding: 4px 10px;
  font-family: inherit;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.1s ease, color 0.1s ease, border-color 0.1s ease;
}

.code-file-tab:hover {
  background: var(--hover);
  color: var(--fg);
}

.code-file-tab.active {
  background: var(--fg);
  border-color: var(--fg);
  color: var(--active-fg);
}

.code-file-tab-kind {
  flex-shrink: 0;
}

.code-file-tab-name {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--mono);
  font-size: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.85;
}

.code-file-tab.active .code-file-tab-name {
  opacity: 0.7;
}

.code-split {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}

.code-split.code-split-scroll {
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
}

.code-split.code-split-scroll > .split-pane {
  flex: 0 0 auto;
  min-height: min(280px, 42vh);
}

.code-split.code-split-scroll > .resize-handle-v {
  flex: 0 0 5px;
}

.code-split.code-split-scroll .code-pane-head {
  cursor: pointer;
}

.code-split.code-split-scroll .code-pane-head:hover {
  filter: brightness(0.97);
}

.code-split > .split-pane {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.code-split > .split-pane:last-of-type {
  border-bottom: none;
}

.code-split > .split-pane > .code-pane {
  flex: 1 1 0;
  min-height: 0;
}

.code-split > .split-pane[data-pane-index="0"] {
  flex: var(--flex-0, 1) 1 0;
}

.code-split > .split-pane[data-pane-index="1"] {
  flex: var(--flex-1, 1) 1 0;
}

.code-split > .split-pane[data-pane-index="2"] {
  flex: var(--flex-2, 1) 1 0;
}

.code-split > .split-pane[data-pane-index="3"] {
  flex: var(--flex-3, 1) 1 0;
}

.code-pane {
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.code-pane-active .code-pane-head {
  background: var(--fg);
  color: var(--active-fg);
}

.code-pane-head {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.code-pane-kind {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.code-pane-pct {
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--muted);
}

.code-pane-active .code-pane-pct {
  color: rgba(255, 255, 255, 0.75);
}

.code-pane-file {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  font-size: 10px;
  font-family: var(--mono);
}

.code-pane-active .code-pane-file {
  color: rgba(255, 255, 255, 0.65);
}

.code-pane-body {
  flex: 1 1 0;
  height: 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: auto;
  overscroll-behavior: contain;
}

.code-pane-generating .code-pane-body,
.code-scroll.code-generating,
.race-lane-generating .race-lane-body {
  overscroll-behavior: contain;
}

.code-viewer.is-typing .code-split.code-split-scroll:has(.code-pane-generating) {
  overscroll-behavior: contain;
}

.code-pane-body .code-block {
  display: flex;
  width: 100%;
  min-width: min-content;
  align-items: flex-start;
}

.code-pane-body .line-nums {
  padding-bottom: 48px;
}

.code-pane-body .code-pre {
  padding-bottom: 48px;
}

.code-pane-empty {
  color: #9ca3af;
}

.code-viewer {
  flex: 1 1 0;
  overflow: hidden;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.code-viewer > .code-split-layout,
.code-viewer > .code-split,
.code-viewer > .code-scroll {
  flex: 1 1 0;
  min-height: 0;
}

.code-scroll {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: auto;
  overscroll-behavior: contain;
}

.code-viewer .empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  margin: 0;
  padding: 32px 20px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.code-viewer .code-preview-only {
  max-width: 280px;
  line-height: 1.5;
}

.code-block {
  display: flex;
  width: 100%;
  align-items: flex-start;
}

.line-nums {
  user-select: none;
  flex-shrink: 0;
  padding: 12px 10px 48px 14px;
  border-right: 1px solid var(--border);
  background: var(--surface-raised);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.65;
  text-align: right;
  color: #9ca3af;
}

.line-nums-pre {
  margin: 0;
  padding: 0;
  font: inherit;
  line-height: inherit;
  color: inherit;
  white-space: pre;
}

.code-pre {
  flex: 1;
  margin: 0;
  padding: 12px 14px 48px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  min-width: 0;
  contain: layout style;
}

.cursor {
  display: inline-block;
  width: 7px;
  height: 15px;
  background: var(--fg);
  border-radius: 1px;
  vertical-align: text-bottom;
  animation: blink 0.9s ease-in-out infinite;
}

@keyframes blink {
  0%,
  45% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0.15;
  }
}

/* ── Preview ────────────────────────────────────────── */

.preview-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  background: var(--surface-raised);
}

#preview-frame {
  width: 100%;
  height: 100%;
  border: none;
  background: var(--surface);
}

#preview-frame.hidden-frame {
  display: none;
}

.preview-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
}

.preview-empty.hidden {
  display: none;
}

.preview-empty p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  max-width: 220px;
  line-height: 1.5;
}

/* ── Race mode ──────────────────────────────────────── */

.race-controls {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.race-select {
  height: 32px;
  border: none;
  border-right: 1px solid var(--border);
  background: var(--surface-raised);
  padding: 0 8px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
}

.race-controls .btn {
  height: 32px;
  border: none;
  border-radius: 0;
}

.race-view {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}

.race-board {
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  display: grid;
  gap: 6px;
  background: var(--surface-raised);
}

.race-board-row {
  display: grid;
  grid-template-columns: 20px 1fr minmax(80px, 120px) 40px;
  gap: 8px;
  align-items: center;
  font-size: 12px;
}

.race-board-rank {
  font-family: var(--mono);
  color: var(--muted);
}

.race-board-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.race-board-pct {
  font-family: var(--mono);
  text-align: right;
}

.race-board-done .race-board-name {
  color: var(--muted);
}

.race-lanes {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior: contain;
}

.race-lane {
  flex: 0 0 min(340px, 42vw);
  min-width: 240px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  min-height: 0;
}

.race-lane-leader {
  background: var(--surface-raised);
}

.race-lane-leader .race-lane-head {
  font-weight: 600;
}

.race-lane-focus {
  box-shadow: inset 0 0 0 2px var(--fg);
}

.race-lane-head {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 10px 12px;
  text-align: left;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  display: grid;
  grid-template-columns: 20px 1fr auto auto;
  grid-template-rows: auto auto;
  gap: 4px 8px;
  align-items: center;
  transition: background 0.1s ease;
}

.race-lane-head:hover {
  background: var(--hover);
}

.race-rank {
  font-family: var(--mono);
  color: var(--muted);
}

.race-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.race-pct {
  font-family: var(--mono);
  font-size: 11px;
}

.race-solo {
  padding: 0 8px;
  height: 22px;
  line-height: 20px;
  font-size: 10px;
  border-radius: var(--radius-sm);
}

.race-bar-track {
  grid-column: 1 / -1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.race-bar-fill {
  height: 100%;
  width: 0;
  background: var(--fg);
  border-radius: 2px;
  transition: width 0.08s linear;
}

.race-lane-body {
  flex: 1 1 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
}

.race-lane-body .code-block {
  min-height: 100%;
}

.race-mini-done {
  color: var(--muted);
}

.code-viewer > .race-view {
  flex: 1 1 0;
  min-height: 0;
}

/* ── Responsive navbar ──────────────────────────────── */

@media (max-width: 768px) {
  .navbar-inner {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--nav-height);
    padding: 10px 12px;
    gap: 10px;
  }

  .navbar-search {
    order: 3;
    flex: 1 1 100%;
    max-width: none;
  }

  .navbar-actions {
    margin-left: 0;
    flex-wrap: wrap;
  }

  .nav-tools {
    flex-wrap: wrap;
  }

  .replay-controls {
    border-left: none;
    padding-left: 0;
  }

  .welcome-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .welcome-bar .btn-primary {
    width: 100%;
  }
}