/* 01. Theme tokens */
:root {
  color-scheme: light;
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --bg-app: #f4f4f1;
  --bg-surface: #fbfbf9;
  --bg-elevated: #ffffff;
  --bg-subtle: #f0f0ec;
  --bg-muted: #e9e9e4;
  --bg-sidebar: #171716;
  --bg-sidebar-hover: #232321;
  --bg-sidebar-active: #2b2b29;
  --bg-overlay: rgba(12, 12, 11, 0.58);

  --text-primary: #1f1f1d;
  --text-secondary: #60605b;
  --text-tertiary: #898982;
  --text-inverse: #f7f7f3;
  --text-sidebar: #bdbdb6;
  --text-sidebar-muted: #7d7d76;

  --border: #dcdcd6;
  --border-strong: #c7c7c0;
  --border-sidebar: #30302d;
  --focus: #77776f;
  --accent: #1f1f1d;
  --accent-hover: #373733;
  --success: #1f9d68;
  --warning: #b7791f;
  --danger: #c53d3d;
  --danger-bg: #fff0ef;

  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 15px;
  --radius-pill: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  --topbar-height: 58px;
  --sidebar-width: 280px;
  --preview-width: minmax(380px, 0.95fr);
  --shadow-sm: 0 1px 2px rgba(15, 15, 14, 0.05);
  --shadow-md: 0 12px 36px rgba(15, 15, 14, 0.12);
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg-app: #151514;
  --bg-surface: #1c1c1a;
  --bg-elevated: #232321;
  --bg-subtle: #292927;
  --bg-muted: #30302d;
  --bg-sidebar: #10100f;
  --bg-sidebar-hover: #1c1c1a;
  --bg-sidebar-active: #292927;
  --bg-overlay: rgba(0, 0, 0, 0.72);

  --text-primary: #f0f0eb;
  --text-secondary: #b1b1aa;
  --text-tertiary: #85857e;
  --text-inverse: #151514;
  --text-sidebar: #bdbdb6;
  --text-sidebar-muted: #73736d;

  --border: #373734;
  --border-strong: #4a4a45;
  --border-sidebar: #292927;
  --focus: #a6a69e;
  --accent: #eeeeea;
  --accent-hover: #d7d7d0;
  --success: #4dcf91;
  --warning: #e1a84b;
  --danger: #ef7070;
  --danger-bg: #3a2020;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 16px 44px rgba(0, 0, 0, 0.35);
}

/* 02. Reset and global behavior */
*, *::before, *::after { box-sizing: border-box; }
html, body { min-width: 320px; min-height: 100%; }
html { background: var(--bg-app); }
body {
  margin: 0;
  overflow: hidden;
  background: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; }
button, select { cursor: pointer; }
button { color: inherit; }
button:disabled, input:disabled, textarea:disabled, select:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}
svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}
::selection { background: color-mix(in srgb, var(--accent) 18%, transparent); }
::placeholder { color: var(--text-tertiary); opacity: 0.82; }
*:focus { outline: none; }
*:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--border-strong);
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background-color: var(--text-tertiary); }
[hidden] { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.mobile-only { display: none !important; }

/* 03. Shared components */
.button,
.icon-button,
.filter-chip,
.editor-tab,
.preview-tab,
.segmented-control button,
.workflow-card,
input,
textarea,
select {
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity var(--transition-fast),
    transform var(--transition-fast);
}

.button {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 13px;
  font-weight: 650;
  white-space: nowrap;
}
.button svg { width: 16px; height: 16px; }
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:active:not(:disabled) { transform: translateY(0) scale(0.98); }
.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--text-inverse);
}
.button-primary:hover:not(:disabled) {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}
.button-secondary,
.button-quiet {
  border-color: var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
}
.button-secondary:hover:not(:disabled),
.button-quiet:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
  color: var(--text-primary);
}
.button-dark {
  border-color: #3a3a37;
  background: #2b2b29;
  color: #f4f4f0;
}
.button-dark:hover:not(:disabled) { background: #363633; }
.button-danger {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}
.button-danger:hover:not(:disabled) { filter: brightness(0.92); }

.icon-button {
  width: 34px;
  height: 34px;
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
}
.icon-button:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
  color: var(--text-primary);
}
.icon-button:active:not(:disabled) { transform: scale(0.94); }
.icon-button-dark {
  border-color: #363633;
  background: #262624;
  color: #bdbdb6;
}
.icon-button-dark:hover:not(:disabled) {
  border-color: #4a4a45;
  background: #30302d;
  color: #fff;
}
.danger-hover:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
  background: var(--danger-bg);
  color: var(--danger);
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-primary);
}
input, select { min-height: 38px; padding: 8px 11px; }
textarea {
  padding: 11px 12px;
  line-height: 1.7;
  resize: vertical;
}
input:hover:not(:disabled), textarea:hover:not(:disabled), select:hover:not(:disabled) {
  border-color: var(--border-strong);
}
input:focus, textarea:focus, select:focus {
  border-color: var(--focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 13%, transparent);
}
select {
  appearance: none;
  padding-right: 32px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-tertiary) 50%), linear-gradient(135deg, var(--text-tertiary) 50%, transparent 50%);
  background-position: calc(100% - 15px) 16px, calc(100% - 10px) 16px;
  background-repeat: no-repeat;
  background-size: 5px 5px, 5px 5px;
}
code {
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg-subtle);
  padding: 1px 5px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.badge,
.subtle-badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  color: var(--text-tertiary);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.eyebrow {
  margin: 0 0 2px;
  color: var(--text-tertiary);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.18em;
}
.field-group { display: grid; gap: 7px; }
.field-group > span:first-child,
.field-label-row {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
}
.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.field-hint { color: var(--text-tertiary); font-weight: 500; }
.field-counter {
  justify-self: end;
  margin-top: -1px;
  color: var(--text-tertiary);
  font-size: 10px;
}
.form-grid { display: grid; gap: var(--space-4); }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* 04. Application shell */
.app-shell { height: 100dvh; min-height: 620px; background: var(--bg-app); }
.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-surface) 94%, transparent);
  backdrop-filter: blur(16px);
}
.brand-group, .brand-line, .topbar-actions, .workspace-switcher {
  display: flex;
  align-items: center;
}
.brand-group { min-width: 0; gap: 10px; }
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 9px;
  background: var(--accent);
  color: var(--text-inverse);
}
.brand-mark svg { width: 20px; height: 20px; }
.brand-copy { min-width: 0; display: grid; gap: 1px; }
.brand-line { gap: 7px; }
.brand-line strong { font-size: 14px; letter-spacing: -0.01em; }
.brand-copy > span { overflow: hidden; color: var(--text-tertiary); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.topbar-actions { gap: 7px; }
.workspace-switcher {
  gap: 7px;
  min-width: 180px;
  height: 34px;
  padding: 0 9px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
}
.workspace-switcher svg { width: 16px; height: 16px; flex: 0 0 auto; }
.workspace-switcher select {
  min-height: 30px;
  padding: 0 22px 0 0;
  border: 0;
  background-color: transparent;
  background-position: calc(100% - 8px) 13px, calc(100% - 3px) 13px;
  font-size: 12px;
  font-weight: 650;
  box-shadow: none;
}
.workspace-switcher select:focus { box-shadow: none; }
.toolbar-divider { width: 1px; height: 22px; margin: 0 2px; background: var(--border); }
.workspace-layout {
  height: calc(100dvh - var(--topbar-height));
  min-height: calc(620px - var(--topbar-height));
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(400px, 1.1fr) var(--preview-width);
  overflow: hidden;
}

/* 05. Sidebar */
.sidebar {
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border-sidebar);
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 14px 11px;
}
.sidebar-header h1 { margin: 0; color: var(--text-inverse); font-size: 14px; }
.sidebar .eyebrow { color: var(--text-sidebar-muted); }
.search-box {
  height: 36px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 12px 9px;
  padding: 0 9px;
  border: 1px solid #343431;
  border-radius: var(--radius-sm);
  background: #20201e;
  color: var(--text-sidebar-muted);
}
.search-box:focus-within {
  border-color: #5b5b55;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.05);
}
.search-box svg { width: 16px; height: 16px; flex: 0 0 auto; }
.search-box input {
  min-width: 0;
  min-height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #e8e8e2;
  font-size: 12px;
  box-shadow: none;
}
.search-box input:focus { box-shadow: none; }
.search-box kbd {
  min-width: 20px;
  padding: 1px 6px;
  border: 1px solid #3d3d39;
  border-radius: 5px;
  background: #282826;
  color: #777771;
  font-family: var(--font-sans);
  font-size: 10px;
  text-align: center;
}
.sidebar-filter { display: flex; gap: 5px; padding: 0 12px 10px; }
.filter-chip {
  padding: 4px 8px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-sidebar-muted);
  font-size: 11px;
  font-weight: 650;
}
.filter-chip:hover { background: var(--bg-sidebar-hover); color: var(--text-sidebar); }
.filter-chip:active { transform: scale(0.96); }
.filter-chip.is-active { background: #292927; color: #f0f0ea; }
.workflow-list {
  min-height: 0;
  display: grid;
  align-content: start;
  gap: 3px;
  overflow-y: auto;
  padding: 0 8px 12px;
}
.workflow-card {
  width: 100%;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  padding: 9px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-sidebar);
  text-align: left;
}
.workflow-card:hover { background: var(--bg-sidebar-hover); color: #eee; }
.workflow-card:active { transform: scale(0.99); }
.workflow-card.is-active {
  border-color: #383835;
  background: var(--bg-sidebar-active);
  color: #fff;
}
.workflow-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #282826;
  color: #8d8d86;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}
.workflow-card.is-active .workflow-icon { background: #f1f1ec; color: #1c1c1a; }
.workflow-card-copy { min-width: 0; display: grid; gap: 2px; }
.workflow-card-copy strong, .workflow-card-copy span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workflow-card-copy strong { font-size: 12px; }
.workflow-card-copy span { color: var(--text-sidebar-muted); font-size: 10px; }
.workflow-card-star { width: 14px; height: 14px; color: #77776f; fill: transparent; }
.workflow-card-star.is-favorite { color: #d8b65a; fill: currentColor; }
.sidebar-empty {
  min-height: 0;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 7px;
  padding: 30px 20px;
  color: var(--text-sidebar-muted);
  text-align: center;
}
.sidebar-empty svg { width: 30px; height: 30px; margin-bottom: 4px; }
.sidebar-empty strong { color: var(--text-sidebar); font-size: 12px; }
.sidebar-empty span { max-width: 190px; font-size: 11px; line-height: 1.55; }
.sidebar-empty .button { margin-top: 8px; }
.sidebar-footer {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-top: 1px solid var(--border-sidebar);
}
.sidebar-tools { display: none; }
.local-status { min-width: 0; display: flex; align-items: center; gap: 9px; }
.local-status > div { min-width: 0; display: grid; gap: 1px; }
.local-status strong { color: #c8c8c1; font-size: 10px; }
.local-status span:last-child { overflow: hidden; color: var(--text-sidebar-muted); font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.status-dot { width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px rgba(31,157,104,0.12); }

/* 06. Editor */
.editor-panel {
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid var(--border);
  background: var(--bg-surface);
}
.editor-content { height: 100%; display: flex; flex-direction: column; }
.panel-header {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}
.workflow-heading, .header-actions, .preview-actions, .provider-identity { display: flex; align-items: center; }
.workflow-heading { min-width: 0; gap: 9px; }
.workflow-heading > div:last-child { min-width: 0; }
.favorite-button { border-color: transparent; background: transparent; }
.favorite-button svg { fill: transparent; }
.favorite-button.is-active { color: #c0932e; }
.favorite-button.is-active svg { fill: currentColor; }
.title-input {
  width: min(440px, 46vw);
  min-height: 26px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 750;
  letter-spacing: -0.01em;
  box-shadow: none;
}
.title-input:hover { border-color: transparent; background: var(--bg-subtle); }
.title-input:focus { border-color: transparent; background: var(--bg-elevated); box-shadow: 0 0 0 3px var(--bg-muted); }
.workflow-meta { display: flex; align-items: center; gap: 5px; color: var(--text-tertiary); font-size: 10px; }
.header-actions { gap: 7px; }
.provider-bar {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 8px 18px;
  border-bottom: 1px solid var(--border);
}
.provider-bar > span { color: var(--text-secondary); font-size: 11px; font-weight: 700; }
.segmented-control {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
}
.segmented-control button {
  min-height: 28px;
  padding: 4px 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: 700;
}
.segmented-control button:hover { color: var(--text-primary); }
.segmented-control button:active { transform: scale(0.97); }
.segmented-control button.is-active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}
.editor-tabs, .preview-tabs {
  display: flex;
  align-items: flex-end;
  gap: 18px;
  min-height: 42px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}
.editor-tab, .preview-tab {
  position: relative;
  align-self: stretch;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 2px;
  border: 0;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 12px;
  font-weight: 700;
}
.editor-tab:hover, .preview-tab:hover { color: var(--text-primary); }
.editor-tab:active, .preview-tab:active { transform: translateY(1px); }
.editor-tab::after, .preview-tab::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: transparent;
}
.editor-tab.is-active, .preview-tab.is-active { color: var(--text-primary); }
.editor-tab.is-active::after, .preview-tab.is-active::after { background: var(--accent); }
.editor-tab span {
  min-width: 18px;
  height: 18px;
  display: inline-grid;
  place-items: center;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  color: var(--text-tertiary);
  font-size: 9px;
}
.editor-scroll { min-height: 0; flex: 1; overflow-y: auto; }
.editor-pane { display: none; padding: 20px 22px 32px; }
.editor-pane.is-active { display: grid; gap: 18px; animation: pane-in var(--transition-base); }
@keyframes pane-in { from { opacity: 0; transform: translateY(3px); } to { opacity: 1; transform: translateY(0); } }
.grow-field { min-height: 310px; grid-template-rows: auto minmax(250px, 1fr) auto; }
.code-editor {
  min-height: 300px;
  resize: vertical;
  tab-size: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
}
.output-capture {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  overflow: hidden;
}
.output-capture summary {
  min-height: 52px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  cursor: pointer;
  list-style: none;
}
.output-capture summary::-webkit-details-marker { display: none; }
.output-capture summary > span { color: var(--text-secondary); font-size: 12px; font-weight: 700; }
.output-capture summary small { color: var(--text-tertiary); font-size: 10px; }
.output-capture summary svg { width: 16px; height: 16px; transition: transform var(--transition-fast); }
.output-capture[open] summary { border-bottom: 1px solid var(--border); }
.output-capture[open] summary svg { transform: rotate(180deg); }
.output-capture .field-group { padding: 13px; }
.pane-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.pane-intro h2 { margin: 0 0 3px; font-size: 14px; }
.pane-intro p { margin: 0; color: var(--text-tertiary); font-size: 11px; }
.variable-fields, .version-list { display: grid; gap: 10px; }
.variable-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.35fr) minmax(180px, 1fr);
  align-items: center;
  gap: 13px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
}
.variable-name { min-width: 0; }
.variable-name strong { display: block; overflow: hidden; font-family: var(--font-mono); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.variable-name span { display: block; margin-top: 2px; color: var(--text-tertiary); font-size: 9px; }
.version-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
}
.version-number {
  min-width: 38px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
}
.version-copy { min-width: 0; }
.version-copy strong, .version-copy span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.version-copy strong { font-size: 11px; }
.version-copy span { margin-top: 3px; color: var(--text-tertiary); font-size: 9px; }
.version-actions { display: flex; gap: 6px; }
.inline-empty, .empty-state {
  display: grid;
  justify-items: center;
  align-content: center;
  color: var(--text-tertiary);
  text-align: center;
}
.inline-empty { min-height: 240px; gap: 7px; }
.inline-empty svg { width: 34px; height: 34px; margin-bottom: 4px; }
.inline-empty strong { color: var(--text-secondary); font-size: 12px; }
.inline-empty span { max-width: 360px; font-size: 11px; }
.empty-state { height: 100%; gap: 9px; padding: 30px; }
.empty-state h2 { margin: 4px 0 0; font-size: 16px; }
.empty-state p { max-width: 400px; margin: 0 0 8px; color: var(--text-tertiary); font-size: 12px; }
.empty-illustration {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}
.empty-illustration svg { width: 27px; height: 27px; }

/* 07. Preview and compare */
.preview-panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-elevated);
}
.preview-header h2 { margin: 0; font-size: 14px; }
.preview-actions { gap: 7px; }
.preview-tabs { flex: 0 0 auto; }
.preview-pane { min-height: 0; display: none; flex: 1; overflow: hidden; }
.preview-pane.is-active { display: flex; flex-direction: column; animation: pane-in var(--transition-base); }
.adapter-info {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.provider-identity { min-width: 0; gap: 9px; }
.provider-identity > div:last-child { min-width: 0; display: grid; gap: 1px; }
.provider-identity strong, .provider-identity span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.provider-identity strong { font-size: 11px; }
.provider-identity span { color: var(--text-tertiary); font-size: 9px; }
.provider-mark {
  width: 32px;
  height: 32px;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
}
.preview-output {
  min-height: 0;
  flex: 1;
  margin: 0;
  overflow: auto;
  padding: 20px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 2;
}
.preview-empty {
  min-height: 0;
  flex: 1;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 7px;
  padding: 30px;
  color: var(--text-tertiary);
  text-align: center;
}
.preview-empty svg { width: 34px; height: 34px; margin-bottom: 4px; }
.preview-empty strong { color: var(--text-secondary); font-size: 12px; }
.preview-empty span { max-width: 300px; font-size: 10px; }
.compare-toolbar {
  min-height: 52px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.compare-toolbar label { min-width: 170px; color: var(--text-tertiary); font-size: 9px; font-weight: 700; }
.compare-toolbar select { min-height: 30px; margin-top: 3px; padding-top: 4px; padding-bottom: 4px; font-size: 10px; }
.compare-grid {
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  flex: 1;
  overflow: hidden;
}
.compare-card { min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
.compare-card + .compare-card { border-left: 1px solid var(--border); }
.compare-card > label { padding: 8px 10px 3px; color: var(--text-tertiary); font-size: 9px; font-weight: 700; }
.compare-card > select { min-height: 30px; margin: 0 10px 8px; padding-top: 4px; padding-bottom: 4px; font-size: 10px; }
.compare-card pre {
  min-height: 0;
  flex: 1;
  margin: 0;
  overflow: auto;
  padding: 13px;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* 08. Dialogs, toast, loading */
.modal {
  width: min(480px, calc(100vw - 28px));
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}
.modal::backdrop { background: var(--bg-overlay); backdrop-filter: blur(3px); }
.modal[open] { animation: modal-in 160ms ease; }
@keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(0.985); } to { opacity: 1; transform: translateY(0) scale(1); } }
.modal form > header,
.modal form > footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 13px 15px;
}
.modal form > header { border-bottom: 1px solid var(--border); }
.modal form > header h2 { margin: 0; font-size: 14px; }
.modal form > footer { justify-content: flex-end; border-top: 1px solid var(--border); }
.modal-body { display: grid; gap: 15px; padding: 17px 16px; }
.form-note, .confirm-message { margin: 0; color: var(--text-tertiary); font-size: 11px; line-height: 1.65; }
.modal-small { width: min(410px, calc(100vw - 28px)); }
.toast-region {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 90;
  display: grid;
  gap: 8px;
  pointer-events: none;
}
.toast {
  min-width: 230px;
  max-width: min(420px, calc(100vw - 36px));
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 9px;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
  font-size: 11px;
  animation: toast-in var(--transition-base);
}
.toast::before { content: ""; width: 7px; height: 7px; margin-top: 5px; border-radius: 50%; background: var(--success); }
.toast.is-error::before { background: var(--danger); }
.toast.is-warning::before { background: var(--warning); }
.toast.is-leaving { opacity: 0; transform: translateY(6px); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  background: color-mix(in srgb, var(--bg-app) 82%, transparent);
  color: var(--text-secondary);
  font-size: 11px;
  backdrop-filter: blur(4px);
}
.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.sidebar-backdrop { display: none; }
.theme-dark-icon { display: none; }
html[data-theme="dark"] .theme-light-icon { display: none; }
html[data-theme="dark"] .theme-dark-icon { display: block; }

/* 09. Workflow composer and release features */
.category-filter {
  display: grid;
  gap: 3px;
  max-height: 150px;
  padding: 2px 9px 10px;
  overflow: auto;
}
.editor-tabs, .preview-tabs { overflow-x: auto; scrollbar-width: none; }
.editor-tabs::-webkit-scrollbar, .preview-tabs::-webkit-scrollbar { display: none; }
.editor-tab, .preview-tab { flex: 0 0 auto; }
.category-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 28px;
  padding: 5px 8px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-sidebar-muted);
  font-size: 11px;
  text-align: left;
  cursor: pointer;
}
.category-chip:hover, .category-chip.is-active { background: var(--bg-sidebar-hover); color: var(--text-sidebar); }
.category-chip b { color: inherit; font-size: 9px; font-variant-numeric: tabular-nums; }

.step-list { display: grid; gap: 12px; }
.step-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}
.step-card:focus-within { border-color: var(--border-strong); box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 18%, transparent); }
.step-header { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: 9px; }
.step-index {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inverse);
  font-size: 10px;
  font-weight: 800;
}
.step-name-input { min-width: 0; border-color: transparent; background: transparent; font-weight: 750; }
.step-name-input:focus { border-color: var(--focus); background: var(--bg-elevated); }
.step-enabled { display: flex; align-items: center; gap: 5px; color: var(--text-secondary); font-size: 10px; }
.step-enabled input { width: 14px; height: 14px; accent-color: var(--accent); }
.step-actions { display: flex; gap: 4px; }
.step-actions .icon-button { width: 28px; height: 28px; }
.step-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.matrix-toolbar, .flow-preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 52px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
}
.matrix-toolbar label { display: flex; align-items: center; gap: 7px; color: var(--text-secondary); font-size: 10px; font-weight: 700; }
.matrix-toolbar select { min-height: 31px; }
.provider-matrix { display: grid; grid-template-columns: 1fr 1fr; height: calc(100% - 52px); overflow: auto; }
.matrix-card { position: relative; display: grid; grid-template-rows: auto minmax(180px, 1fr) auto; gap: 10px; min-width: 0; padding: 13px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.matrix-card:nth-child(2n) { border-right: 0; }
.matrix-card header { display: flex; align-items: center; gap: 8px; min-width: 0; }
.matrix-card header > div { display: grid; min-width: 0; }
.matrix-card header strong { font-size: 11px; }
.matrix-card header span:not(.provider-mark) { overflow: hidden; color: var(--text-tertiary); font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.matrix-card pre, .compiled-step pre { margin: 0; overflow: auto; color: var(--text-primary); font: 10px/1.65 var(--font-mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.matrix-card .button { justify-self: end; }

.compiled-flow { display: grid; gap: 12px; height: calc(100% - 52px); padding: 14px; overflow: auto; }
.compiled-step { display: grid; gap: 10px; padding: 13px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--bg-surface); }
.compiled-step header { display: flex; align-items: center; gap: 9px; }
.compiled-step header > span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; background: var(--accent); color: var(--text-inverse); font-size: 10px; font-weight: 800; }
.compiled-step header div { display: grid; gap: 2px; }
.compiled-step header strong { font-size: 11px; }
.compiled-step header small, .compiled-condition { color: var(--text-tertiary); font-size: 9px; }
.compiled-condition { margin: 0; padding: 7px 9px; border-radius: var(--radius-sm); background: var(--bg-subtle); }

.danger-zone { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px; border: 1px solid color-mix(in srgb, var(--danger) 35%, var(--border)); border-radius: var(--radius-md); background: var(--danger-bg); }
.danger-zone > div { display: grid; gap: 2px; }
.danger-zone strong { font-size: 11px; }
.danger-zone span { color: var(--text-secondary); font-size: 9px; }
.export-options { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.export-option { display: grid; gap: 4px; min-height: 82px; padding: 13px; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--bg-surface); color: var(--text-primary); text-align: left; cursor: pointer; }
.export-option:hover { border-color: var(--border-strong); background: var(--bg-subtle); transform: translateY(-1px); }
.export-option strong { font-size: 12px; }
.export-option span { color: var(--text-secondary); font-size: 10px; line-height: 1.5; }

/* 10. Responsive layout */
@media (max-width: 1220px) {
  :root { --sidebar-width: 250px; }
  .workspace-layout { grid-template-columns: var(--sidebar-width) minmax(360px, 1fr) minmax(340px, 0.9fr); }
  .topbar .button-quiet { padding-inline: 9px; }
  .workspace-switcher { min-width: 150px; }
}

@media (max-width: 980px) {
  body { overflow: auto; }
  .app-shell { height: auto; min-height: 100dvh; }
  .mobile-only { display: inline-grid !important; }
  .desktop-only { display: none !important; }
  .topbar { position: sticky; top: 0; z-index: 40; }
  .workspace-switcher { min-width: 130px; max-width: 190px; }
  .workspace-layout {
    height: auto;
    min-height: calc(100dvh - var(--topbar-height));
    grid-template-columns: minmax(0, 1fr);
    overflow: visible;
  }
  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    bottom: 0;
    left: 0;
    z-index: 60;
    width: min(320px, calc(100vw - 56px));
    transform: translateX(-102%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-md);
  }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-tools {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    padding: 9px 10px;
    border-top: 1px solid var(--border-sidebar);
  }
  .sidebar-tools .button { min-width: 0; padding-inline: 7px; font-size: 10px; }
  .sidebar-backdrop {
    position: fixed;
    inset: var(--topbar-height) 0 0;
    z-index: 50;
    display: block;
    background: var(--bg-overlay);
  }
  .editor-panel { min-height: 720px; border-right: 0; border-bottom: 1px solid var(--border); }
  .preview-panel { min-height: 680px; }
  .editor-scroll { overflow: visible; }
  .preview-output { min-height: 520px; }
  .compare-grid { min-height: 530px; }
}

@media (max-width: 680px) {
  :root { --topbar-height: 54px; }
  .topbar { padding: 0 9px; }
  .brand-copy { display: none; }
  .brand-mark { width: 31px; height: 31px; }
  .workspace-switcher { min-width: 0; width: min(42vw, 170px); }
  .topbar-actions #importButton,
  .topbar-actions #exportButton,
  .topbar-actions #shareButton { display: none; }
  .toolbar-divider { display: none; }
  .panel-header { padding-inline: 12px; }
  .editor-header { align-items: flex-start; }
  .workflow-heading { flex: 1; }
  .title-input { width: 100%; max-width: 55vw; }
  .header-actions .icon-button { display: none; }
  .header-actions .button { width: 34px; min-height: 34px; padding: 0; font-size: 0; }
  .provider-bar { align-items: flex-start; flex-direction: column; gap: 7px; padding: 9px 12px; }
  .segmented-control { width: 100%; overflow: hidden; }
  .segmented-control button { flex: 1 1 0; min-width: 0; padding-inline: 6px; font-size: 10px; }
  .field-label-row { align-items: flex-start; flex-wrap: wrap; }
  .field-hint { max-width: 100%; overflow-wrap: anywhere; }
  .editor-tabs, .preview-tabs { gap: 16px; padding-inline: 14px; }
  .editor-pane { padding: 16px 13px 26px; }
  .two-columns { grid-template-columns: 1fr; }
  .grow-field { min-height: 260px; grid-template-rows: auto minmax(210px, 1fr) auto; }
  .code-editor { min-height: 240px; }
  .variable-row { grid-template-columns: 1fr; }
  .version-card { grid-template-columns: auto minmax(0, 1fr); }
  .version-actions { grid-column: 1 / -1; justify-content: flex-end; }
  .pane-intro { align-items: flex-start; }
  .pane-intro .button { padding-inline: 9px; font-size: 10px; }
  .preview-header { align-items: flex-start; }
  .preview-output { min-height: 430px; padding: 16px; }
  .compare-grid { min-height: 800px; grid-template-columns: 1fr; overflow: visible; }
  .compare-card { min-height: 390px; }
  .compare-card + .compare-card { border-top: 1px solid var(--border); border-left: 0; }
  .step-header { grid-template-columns: auto minmax(0, 1fr) auto; }
  .step-enabled { grid-column: 2; }
  .step-actions { grid-column: 3; grid-row: 1 / span 2; }
  .step-grid, .export-options { grid-template-columns: 1fr; }
  .provider-matrix { grid-template-columns: 1fr; height: auto; }
  .matrix-card { min-height: 420px; border-right: 0; }
  .compare-toolbar { align-items: center; }
  .toast-region { right: 10px; bottom: 10px; left: 10px; }
  .toast { width: 100%; max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}