/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: var(--btn-h);
  padding: 0 10px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-sans);
  font-size: var(--fs-13);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease, color 120ms ease;
}
.btn:hover { background: var(--bg-elev-2); border-color: var(--border-strong); }
.btn:active { background: var(--bg-elev-2); box-shadow: none; transform: translateY(0.5px); }
.btn:focus-visible { outline: 2px solid var(--accent-ring); outline-offset: 2px; border-color: var(--accent); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; box-shadow: none; }

.btn.primary {
  background: var(--accent);
  color: var(--text-on-accent);
  border-color: var(--accent);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.12);
}
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.primary:active { background: var(--accent-active); border-color: var(--accent-active); box-shadow: none; }
.btn.primary:focus-visible { outline: 2px solid var(--accent-ring); outline-offset: 2px; border-color: var(--accent); }

.btn.ghost {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  color: var(--text-muted);
}
.btn.ghost:hover { background: var(--bg-elev-2); color: var(--text); border-color: transparent; }

.btn.icon { width: var(--btn-h); padding: 0; justify-content: center; }
.btn .kbd {
  font-family: var(--font-mono);
  font-size: var(--fs-11);
  color: var(--text-soft);
  padding: 0 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  margin-left: 2px;
}

/* Toolbar */
.toolbar {
  position: relative;
  display: flex; align-items: center; gap: var(--space-3);
  padding: 0 var(--space-5);
  height: var(--toolbar-h);
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  flex-wrap: nowrap;
}
.toolbar .spacer { flex: 1; }
.toolbar .label {
  font-size: var(--fs-12);
  font-weight: 500;
  color: var(--text-soft);
  margin-right: 4px;
  white-space: nowrap;
}
.toolbar-sep {
  display: inline-block;
  width: 1px; height: 16px;
  background: var(--border);
  margin: 0 var(--space-3);
}
@media (max-width: 760px) {
  .toolbar { flex-wrap: wrap; height: auto; min-height: var(--toolbar-h); padding: 6px var(--space-5); }
}

/* Select */
.select {
  height: var(--input-h);
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 8px;
  font-size: var(--fs-13);
  font-family: var(--font-sans);
}
.select:focus-visible { outline: 2px solid var(--accent-ring); outline-offset: 2px; border-color: var(--accent); }

/* Checkbox row */
.check {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--fs-13);
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
}
.check input { accent-color: var(--accent); }

/* Editor */
.editor {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  background: var(--bg-input);
  overflow: hidden;
  min-height: 200px;
}
.editor .gutter {
  background: var(--bg-input);
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.55;
  text-align: right;
  padding: 12px 10px 12px 0;
  user-select: none;
  border-right: 1px solid var(--border);
  overflow: hidden;
  white-space: pre;
}
.editor textarea, .editor .output {
  margin: 0;
  border: 0;
  resize: none;
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.55;
  padding: 12px 14px;
  outline: none;
  white-space: pre;
  overflow: auto;
  tab-size: 2;
  min-height: 200px;
}
.editor textarea { caret-color: var(--accent); word-spacing: normal; }
.editor.read-only .output { user-select: text; }
.editor.dropping {
  outline: 2px dashed var(--accent);
  outline-offset: -3px;
  background: var(--accent-soft);
}
.editor .placeholder {
  position: absolute; left: 54px; top: 12px;
  color: var(--text-soft); pointer-events: none;
  font-family: var(--font-mono); font-size: var(--fs-13);
}

/* Syntax highlighting tokens */
.tok-key { color: var(--tok-key); }
.tok-string { color: var(--tok-string); }
.tok-number { color: var(--tok-number); }
.tok-bool { color: var(--tok-bool); }
.tok-null { color: var(--tok-null); }
.tok-punct { color: var(--tok-punct); }
.tok-error {
  text-decoration: underline wavy var(--tok-error);
  text-underline-offset: 3px;
}

/* Status bar */
.status-bar {
  height: var(--status-h);
  display: flex; align-items: center; gap: var(--space-3);
  padding: 0 var(--space-5);
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  font-size: var(--fs-12);
  color: var(--text-muted);
}
.status-bar.ok::before,
.status-bar.err::before,
.status-bar.warn::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; flex: 0 0 6px;
}
.status-bar.ok  { color: var(--success); }
.status-bar.ok::before  { background: var(--success); }
.status-bar.warn { color: var(--warning); }
.status-bar.warn::before { background: var(--warning); }
.status-bar.err {
  color: var(--danger);
  background: var(--danger-soft);
  border-top-color: var(--danger);
}
.status-bar.err::before { background: var(--danger); }
.status-bar .jump { margin-left: auto; }
.status-bar .jump button {
  background: transparent; border: 1px solid currentColor; color: inherit;
  padding: 2px 8px; border-radius: var(--radius-xs); cursor: pointer; font-size: var(--fs-12);
}

/* Tree view */
.tree {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.55;
  padding: 12px 14px;
  overflow: auto;
  height: 100%;
  background: var(--bg-input);
}
.tree-node { padding-left: 14px; position: relative; }
.tree-node.root { padding-left: 0; }
.tree-toggle {
  position: absolute; left: 0; top: 5px;
  width: 14px; height: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; user-select: none;
  color: var(--text-muted);
}
.tree-toggle::before {
  content: ""; width: 0; height: 0;
  border-left: 4px solid var(--text-soft);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 100ms ease;
}
.tree-node:not(.collapsed) > .tree-toggle::before { transform: rotate(90deg); }
.tree-node.collapsed > .tree-children { display: none; }
.tree-node.collapsed > .tree-row .tree-summary { display: inline; }
.tree-row {
  display: inline-flex; align-items: center; gap: 4px; flex-wrap: wrap;
  padding: 0 4px; margin: 0 -4px;
  border-radius: 4px;
}
.tree-node:hover > .tree-row { background: var(--accent-soft); }
.tree-row .tree-key { color: var(--tok-key); }
.tree-row .tree-string { color: var(--tok-string); }
.tree-row .tree-number { color: var(--tok-number); }
.tree-row .tree-bool { color: var(--tok-bool); }
.tree-row .tree-null { color: var(--tok-null); }
.tree-row .tree-punct { color: var(--tok-punct); }
.tree-row .tree-summary { display: none; color: var(--text-soft); font-size: var(--fs-12); }
.tree-row .tree-copy {
  visibility: hidden;
  border: 0; background: transparent; cursor: pointer;
  color: var(--text-muted); font-size: 11px; padding: 0 4px;
}
.tree-node:hover > .tree-row > .tree-copy { visibility: visible; }
.tree-node:hover > .tree-row > .tree-copy:hover { color: var(--accent); }

/* Settings popover */
.settings-popover {
  position: absolute;
  top: calc(var(--toolbar-h) + 4px);
  right: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 12px;
  width: 240px;
  display: none;
  z-index: 20;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 100ms ease, transform 100ms ease;
}
.settings-popover.open {
  display: block;
  opacity: 1;
  transform: translateY(0);
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 0;
  font-size: var(--fs-13);
  color: var(--text);
}
.settings-row + .settings-row { border-top: 1px solid var(--border); margin-top: 8px; padding-top: 12px; }
.settings-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.settings-grid .btn { width: 100%; justify-content: center; }

/* FAQ */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
  background: transparent;
  overflow: hidden;
  content-visibility: auto;
  contain-intrinsic-size: 1px 60px;
}
.faq-item summary {
  cursor: pointer; list-style: none;
  padding: 14px 16px;
  font-size: var(--fs-13);
  font-weight: 500;
  color: var(--text);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-5);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  width: 8px; height: 8px;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 180ms cubic-bezier(0.4, 0, 0.2, 1);
  margin-bottom: 3px;
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(-135deg); margin-bottom: -3px; }
.faq-item > div {
  padding: 0 16px 14px;
  color: var(--text-muted);
  font-size: var(--fs-13);
  line-height: 1.6;
}

/* Tabs (used on tool pages with secondary modes) */
.tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--border);
  padding: 0 var(--space-5);
  background: var(--bg-elev);
}
.tab {
  padding: 8px 12px; cursor: pointer;
  background: transparent; border: 0; border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-13);
  font-weight: 500;
}
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

/* Consent banner */
.consent {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-elev); border-top: 1px solid var(--border);
  padding: var(--space-5) var(--space-6);
  display: flex; gap: var(--space-5); align-items: center; flex-wrap: wrap;
  font-size: var(--fs-13); z-index: 30;
  box-shadow: var(--shadow-md);
}
.consent p { margin: 0; flex: 1; min-width: 240px; color: var(--text-muted); }
.consent .actions { display: flex; gap: 8px; }

/* Feature cards on landing-ish blocks */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5); margin: var(--space-6) 0;
}
.feature-card {
  padding: 16px 18px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}
.feature-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.feature-card h4 {
  margin: 0 0 4px;
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: -0.005em;
}
.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-13);
  line-height: 1.55;
}

/* Util */
.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;
}
.hide-on-mobile { }
@media (max-width: 760px) { .hide-on-mobile { display: none !important; } }
</content>
</invoke>