/* ==========================================================================
   JSON Formatter & Validator — Split-Pane Studio Stylesheet
   ========================================================================== */

.json-studio {
  width: 100%;
  margin-bottom: var(--space-8);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ----------------------------------------------------------------- toolbar */

.json-studio__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.json-studio__group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.json-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}

.json-btn:hover {
  background: var(--surface-2);
  border-color: var(--primary);
  color: var(--fg);
}

.json-btn--primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--fg-on-primary, #fff);
  font-weight: 700;
}

.json-btn--primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--fg-on-primary, #fff);
}

.json-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--fg-muted);
}

.json-btn--ghost:hover {
  background: var(--surface);
  border-color: var(--border);
  color: var(--fg);
}

.json-select-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  color: var(--fg-muted);
}

.json-select {
  height: 36px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  outline: none;
}

.json-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  user-select: none;
  transition: all var(--dur) var(--ease);
}

.json-toggle:hover {
  border-color: var(--primary);
}

.json-toggle input {
  margin: 0;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ------------------------------------------------------------- status bar */

.json-studio__status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 8px var(--space-4);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--fg-muted);
}

.json-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.json-badge--idle {
  color: var(--fg-muted);
}

.json-badge--valid {
  color: #059669;
}

.json-badge--error {
  color: #dc2626;
}

.json-badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.json-studio__alert {
  margin: 0;
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}

/* ----------------------------------------------------------- mobile tabs */

.json-studio__mobile-tabs {
  display: none;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.json-mobile-tab {
  flex: 1;
  padding: 10px;
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  border: 0;
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.json-mobile-tab.is-active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--surface);
}

/* ----------------------------------------------------------- split panes */

.json-studio__panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 540px;
  background: var(--surface);
}

.json-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.json-pane--input {
  border-right: 1px solid var(--border);
}

.json-pane__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px var(--space-3);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--fg-muted);
  user-select: none;
}

.json-pane__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--fg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 11px;
}

.json-pane__actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.json-mini-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 26px;
  padding: 0 8px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm, 4px);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.json-mini-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.json-mini-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 700;
}

/* ------------------------------------------------- code editor & gutter */

.json-editor-wrap {
  flex: 1;
  position: relative;
  display: flex;
  min-height: 480px;
  overflow: hidden;
  background: var(--surface);
}

.json-gutter {
  flex: 0 0 46px;
  padding: 12px 8px 12px 4px;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 13px;
  line-height: 20px;
  text-align: right;
  color: var(--fg-subtle);
  background: color-mix(in srgb, var(--surface-2) 65%, var(--surface));
  border-right: 1px solid var(--border);
  user-select: none;
  overflow: hidden;
  white-space: pre;
}

.json-textarea {
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 12px;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--fg);
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 13px;
  line-height: 20px;
  tab-size: 2;
  white-space: pre;
  overflow: auto;
  resize: none;
}

.json-textarea::placeholder {
  color: var(--fg-subtle);
}

/* ---------------------------------------------------- output code viewer */

.json-code-viewer {
  flex: 1;
  position: relative;
  display: flex;
  min-height: 480px;
  overflow: hidden;
  background: var(--surface);
}

.json-code-pre {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 12px;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 13px;
  line-height: 20px;
  tab-size: 2;
  overflow: auto;
  white-space: pre;
  color: var(--fg);
}

/* -------------------------------------------------- syntax highlighting */

.json-key {
  color: #2563eb;
  font-weight: 600;
}

.json-string {
  color: #059669;
}

.json-number {
  color: #d97706;
}

.json-boolean {
  color: #7c3aed;
  font-weight: 600;
}

.json-null {
  color: #dc2626;
  font-style: italic;
}

.json-punct {
  color: var(--fg-muted);
}

/* Dark mode adjustments via [data-theme="dark"] or (prefers-color-scheme) */
@media (prefers-color-scheme: dark) {
  .json-key { color: #60a5fa; }
  .json-string { color: #34d399; }
  .json-number { color: #fbbf24; }
  .json-boolean { color: #a78bfa; }
  .json-null { color: #f87171; }
}

[data-theme="dark"] .json-key { color: #60a5fa; }
[data-theme="dark"] .json-string { color: #34d399; }
[data-theme="dark"] .json-number { color: #fbbf24; }
[data-theme="dark"] .json-boolean { color: #a78bfa; }
[data-theme="dark"] .json-null { color: #f87171; }

/* ------------------------------------------------- interactive tree view */

.json-tree-viewer {
  flex: 1;
  min-height: 480px;
  padding: 12px 16px;
  overflow: auto;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 13px;
  line-height: 22px;
  background: var(--surface);
}

.json-tree-node {
  margin-left: 18px;
  position: relative;
}

.json-tree-node--root {
  margin-left: 0;
}

.json-tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-right: 4px;
  font-size: 10px;
  font-weight: 700;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg-muted);
  cursor: pointer;
  user-select: none;
  vertical-align: middle;
  transition: all var(--dur) var(--ease);
}

.json-tree-toggle:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.json-tree-count {
  display: inline-block;
  margin-left: 6px;
  padding: 0 5px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 3px;
  background: var(--surface-2);
  color: var(--fg-muted);
}

.json-tree-collapsed > .json-tree-body {
  display: none;
}

.json-tree-body {
  border-left: 1px dashed var(--border);
  margin-left: 7px;
  padding-left: 4px;
}

/* --------------------------------------------------------------- mobile */

@media (max-width: 768px) {
  .json-studio__mobile-tabs {
    display: flex;
  }

  .json-studio__panes {
    grid-template-columns: 1fr;
  }

  .json-pane--input {
    border-right: 0;
  }

  .json-pane[data-tab="output"]:not(.is-active),
  .json-pane[data-tab="input"]:not(.is-active) {
    display: none;
  }
}