:root {
  color-scheme: light;
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-soft: #f7f8fa;
  --editor-bg: #fbfcfe;
  --ink: #0f172a;
  --text: #1f2937;
  --muted: #6b7280;
  --faint: #9ca3af;
  --border: #e5e8ee;
  --border-soft: #eef0f3;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eaf1ff;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --success: #047857;
  --success-soft: #ecfdf5;
  --warning: #a16207;
  --warning-soft: #fffbeb;
  --radius: 12px;
  --mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

::selection {
  background: rgba(37, 99, 235, 0.18);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #d7dce4;
  border: 2px solid #ffffff;
  border-radius: 8px;
}

button,
input,
textarea {
  font: inherit;
}

button,
.button-like {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  color: #374151;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  padding: 0 14px;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

button:hover,
.button-like:hover {
  border-color: #cfd5df;
  background: #fafbfc;
}

button:focus-visible,
.button-like:focus-visible,
input:focus-visible,
textarea:focus-visible,
pre:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.2);
  outline-offset: 2px;
}

button.primary,
.mode-button.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

button.primary:hover,
.mode-button.active:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

#jsonFileInput {
  display: none;
}

.app-shell {
  width: min(1440px, 100%);
  height: 100vh;
  margin: 0 auto;
  padding: 26px 32px 40px;
}

.workspace {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 14px;
  height: calc(100vh - 66px);
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.title-block {
  max-width: 640px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  height: 26px;
  margin: 0 0 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0 11px;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  color: var(--ink);
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h2 {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.subtitle {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  padding: 0 16px;
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: currentColor;
  flex: 0 0 auto;
}

.status.valid {
  border-color: #bbf7d0;
  background: var(--success-soft);
  color: var(--success);
}

.status.invalid {
  border-color: #fecaca;
  background: var(--danger-soft);
  color: var(--danger);
}

.status.repaired {
  border-color: #fde68a;
  background: var(--warning-soft);
  color: var(--warning);
}

.editors {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  min-height: 0;
}

.panel {
  display: grid;
  grid-template-rows: auto auto auto 1fr;
  min-height: 600px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.output-panel {
  grid-template-rows: auto auto auto 1fr;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border-soft);
  padding: 13px 16px;
}

.panel-title {
  display: grid;
  gap: 2px;
}

.panel-title span {
  color: var(--faint);
  font-size: 12px;
  font-weight: 600;
}

.file-badge {
  max-width: 240px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-soft);
  padding: 10px 16px;
}

.action-spacer {
  flex: 1 1 auto;
}

.segmented {
  display: inline-flex;
  gap: 2px;
  border: 1px solid var(--border-soft);
  border-radius: 9px;
  background: var(--surface-soft);
  padding: 3px;
}

.segmented button {
  min-height: 30px;
  border-color: transparent;
  background: transparent;
  padding: 0 12px;
}

.search-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 1px solid var(--border-soft);
  padding: 10px 16px;
}

.searchbar {
  display: flex;
  align-items: center;
  gap: 6px;
  width: min(320px, 100%);
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  padding: 0 10px;
}

.searchbar input {
  min-width: 0;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.searchbar span {
  color: var(--faint);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.search-nav {
  min-height: 26px;
  width: 22px;
  flex: 0 0 auto;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0;
}

.search-nav:hover {
  border-color: transparent;
  background: transparent;
  color: var(--text);
}

.search-nav:disabled {
  opacity: 0.35;
  cursor: default;
}

.tree-actions {
  display: flex;
  gap: 8px;
}

.tree-actions button {
  min-height: 30px;
  font-size: 12px;
  padding: 0 10px;
}

.validation-message {
  border-bottom: 1px solid var(--border-soft);
  background: #f8fafc;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
  padding: 10px 16px;
}

.validation-message.valid {
  background: var(--success-soft);
  color: var(--success);
}

.validation-message.invalid {
  background: var(--danger-soft);
  color: var(--danger);
}

.validation-message.repaired {
  background: var(--warning-soft);
  color: var(--warning);
}

.input-editor {
  position: relative;
  min-height: 0;
  background: var(--editor-bg);
}

.input-highlight,
textarea,
.output-code,
.tree-output {
  width: 100%;
  min-width: 0;
  min-height: 0;
  margin: 0;
  border: 0;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.65;
  tab-size: 2;
}

.input-highlight,
textarea {
  position: absolute;
  inset: 0;
  overflow: auto;
  padding: 18px;
}

.input-highlight {
  z-index: 1;
  background: transparent;
  color: transparent;
  pointer-events: none;
  white-space: pre-wrap;
  word-break: break-word;
}

textarea {
  z-index: 2;
  resize: none;
  background: transparent;
  color: var(--ink);
  caret-color: var(--ink);
  outline: none;
}

.output-code,
.tree-output {
  overflow: auto;
  background: var(--editor-bg);
  padding: 18px;
  white-space: pre-wrap;
  word-break: break-word;
}

.output-empty {
  color: #c2c8d3;
  font-style: italic;
}

mark {
  border-radius: 4px;
  background: #fde68a;
  color: #111827;
  padding: 0 2px;
}

mark.current-match {
  background: var(--accent);
  color: #ffffff;
}

.input-error-mark {
  background: rgba(220, 38, 38, 0.18);
  border-bottom: 2px solid var(--danger);
  border-radius: 2px;
  color: transparent;
  padding: 0;
}

.drop-overlay {
  position: absolute;
  inset: 8px;
  z-index: 3;
  display: none;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--accent);
  border-radius: 10px;
  background: rgba(234, 241, 255, 0.92);
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
  pointer-events: none;
}

.input-editor.drag-over .drop-overlay {
  display: flex;
}

.token-key {
  color: #1d4ed8;
}

.token-string {
  color: #047857;
}

.token-number {
  color: #9333ea;
}

.token-boolean {
  color: #b45309;
}

.token-null {
  color: #64748b;
}

.token-punctuation {
  color: #64748b;
}

.tree-row {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  line-height: 1.75;
  border-radius: 4px;
}

.tree-row[data-path] {
  cursor: pointer;
}

.tree-row[data-path]:hover {
  background: var(--surface-soft);
}

.tree-row[data-path]:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.2);
  outline-offset: 2px;
}

.tree-row.current-match {
  background: var(--accent-soft);
}

.tree-toggle {
  width: 16px;
  min-height: 22px;
  border: 0;
  background: transparent;
  color: #94a3b8;
  cursor: pointer;
  flex: 0 0 auto;
  font-size: 10px;
  padding: 0;
}

.tree-spacer {
  width: 16px;
  flex: 0 0 auto;
}

.tree-key {
  color: #1d4ed8;
  font-weight: 600;
}

.tree-muted {
  color: #94a3b8;
}

.tree-punctuation {
  color: #64748b;
}

.tree-string {
  color: #047857;
}

.tree-number {
  color: #9333ea;
}

.tree-boolean {
  color: #b45309;
}

.tree-null {
  color: #64748b;
}

@media (max-width: 980px) {
  .app-shell {
    padding: 18px 16px 28px;
  }

  .editors {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: 520px;
  }
}

@media (max-width: 560px) {
  .panel-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .panel-actions button,
  .button-like,
  .segmented,
  .segmented button,
  .searchbar {
    width: 100%;
  }

  .segmented {
    flex-direction: column;
  }
}