/* ========== JSON Formatter — Design system ========== */
:root {
  --jf-bg: #fafaf9;
  --jf-surface: #ffffff;
  --jf-surface-raised: #f5f5f4;
  --jf-border: #e7e5e4;
  --jf-border-strong: #d6d3d1;
  --jf-text: #1c1917;
  --jf-text-muted: #78716c;
  --jf-accent: #0d9488;
  --jf-accent-hover: #0f766e;
  --jf-accent-subtle: rgba(13, 148, 136, 0.12);
  --jf-error-bg: #fef2f2;
  --jf-error-border: #fecaca;
  --jf-error-text: #b91c1c;
  --jf-success-bg: #f0fdf4;
  --jf-success-border: #bbf7d0;
  --jf-radius: 10px;
  --jf-radius-sm: 6px;
  --jf-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --jf-shadow-focus: 0 0 0 3px rgba(13, 148, 136, 0.2);
  --jf-font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --jf-font-mono: "JetBrains Mono", "Cascadia Code", "SF Mono", ui-monospace, monospace;
  --jf-control-h: 40px;
}

body.dark {
  --jf-bg: #1c1917;
  --jf-surface: #292524;
  --jf-surface-raised: #44403c;
  --jf-border: #44403c;
  --jf-border-strong: #57534e;
  --jf-text: #fafaf9;
  --jf-text-muted: #a8a29e;
  --jf-accent: #14b8a6;
  --jf-accent-hover: #2dd4bf;
  --jf-accent-subtle: rgba(20, 184, 166, 0.18);
  --jf-error-bg: #450a0a;
  --jf-error-border: #991b1b;
  --jf-error-text: #fca5a5;
  --jf-success-bg: #052e16;
  --jf-success-border: #166534;
  --jf-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --jf-shadow-focus: 0 0 0 3px rgba(20, 184, 166, 0.35);
}

body {
  background: var(--jf-bg);
  color: var(--jf-text);
}

/* ========== Layout ========== */
.container {
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 16px 20px;
  box-sizing: border-box;
  font-family: var(--jf-font-sans);
  color: var(--jf-text);
  background: var(--jf-bg);
}

.container.field-editor-active {
  width: 100%;
  max-width: 100%;
}

/* ========== Header ========== */
.container h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  color: var(--jf-text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.container h1::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 28px;
  background: var(--jf-accent);
  border-radius: var(--jf-radius-sm);
  opacity: 0.9;
}

.help-text {
  color: var(--jf-text-muted);
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.section {
  margin-bottom: 1.75rem;
}

/* ========== Toolbar ========== */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  padding: 12px 0;
}

.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.toolbar-group-options {
  margin-left: 12px;
  padding-left: 14px;
  border-left: 1px solid var(--jf-border);
}

body.dark .toolbar-group-options {
  border-left-color: var(--jf-border-strong);
}

/* ========== Buttons ========== */
.btn {
  min-height: var(--jf-control-h);
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--jf-radius-sm);
  border: 1px solid var(--jf-border-strong);
  background: var(--jf-surface);
  color: var(--jf-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  font-family: var(--jf-font-sans);
}

.btn:hover {
  background: var(--jf-surface-raised);
  border-color: var(--jf-text-muted);
}

.btn-primary {
  background: var(--jf-accent);
  color: #fff;
  border-color: var(--jf-accent);
}

.btn-primary:hover {
  background: var(--jf-accent-hover);
  border-color: var(--jf-accent-hover);
}

.btn-hint {
  margin-left: 6px;
  font-size: 0.7rem;
  font-weight: normal;
  opacity: 0.85;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

.btn-secondary {
  background: var(--jf-surface-raised);
  border-color: var(--jf-border);
}

.btn-secondary:hover {
  background: var(--jf-border);
  border-color: var(--jf-border-strong);
}

body.dark .btn-secondary {
  background: var(--jf-surface-raised);
  border-color: var(--jf-border-strong);
  color: var(--jf-text);
}

body.dark .btn-secondary:hover {
  background: var(--jf-border-strong);
}

.auto-format-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--jf-text-muted);
  cursor: pointer;
  user-select: none;
}

/* ========== Text mode: JSON input ========== */
.json-input-wrap {
  display: flex;
  min-height: 320px;
  border: 1px solid var(--jf-border);
  border-radius: var(--jf-radius);
  overflow: hidden;
  background: var(--jf-surface);
  box-shadow: var(--jf-shadow);
}

.json-input-wrap:focus-within {
  border-color: var(--jf-accent);
  box-shadow: var(--jf-shadow-focus);
}

.line-numbers {
  flex-shrink: 0;
  width: 2.75em;
  padding: 14px 10px 14px 14px;
  font-family: var(--jf-font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--jf-text-muted);
  background: var(--jf-surface-raised);
  border-right: 1px solid var(--jf-border);
  overflow-y: auto;
  overflow-x: hidden;
  user-select: none;
}

.line-numbers .ln-num {
  display: block;
  text-align: right;
}

.json-input-inner {
  flex: 1;
  min-width: 0;
}

.json-input-inner textarea {
  display: block;
  width: 100%;
  min-height: 318px;
  height: 100%;
  padding: 14px 16px;
  font-family: var(--jf-font-mono);
  font-size: 14px;
  line-height: 1.6;
  border: none;
  border-radius: 0;
  resize: vertical;
  box-sizing: border-box;
  background: var(--jf-surface);
  color: var(--jf-text);
}

#jsonInput:focus {
  outline: none;
}

body.dark #jsonInput {
  background: var(--jf-surface);
  color: var(--jf-text);
}

.line-numbers .line-number-error {
  background: rgba(185, 28, 28, 0.12);
  color: var(--jf-error-text);
  font-weight: 600;
}

body.dark .line-numbers .line-number-error {
  background: rgba(248, 113, 113, 0.2);
  color: #fca5a5;
}

body.dark .line-numbers {
  background: var(--jf-surface-raised);
  border-right-color: var(--jf-border);
}

/* ========== Stats & text tools ========== */
.text-tools-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
}

.stats-bar {
  font-size: 0.8125rem;
  color: var(--jf-text-muted);
}

.text-tools-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#indentSizeSelect {
  padding: 6px 10px;
  font-size: 0.875rem;
  border-radius: var(--jf-radius-sm);
  border: 1px solid var(--jf-border);
  background: var(--jf-surface);
  color: var(--jf-text);
  font-family: var(--jf-font-sans);
}

/* ========== Error / success ========== */
.error-box {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 10px;
}

.error-msg {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  font-size: 0.875rem;
  color: var(--jf-error-text);
  background: var(--jf-error-bg);
  border-radius: var(--jf-radius-sm);
  border: 1px solid var(--jf-error-border);
  border-left-width: 4px;
  border-left-color: var(--jf-error-text);
}

.error-msg.hidden {
  display: none;
}

.hidden {
  display: none !important;
}

/* ========== Field editor section ========== */
.field-editor-section {
  --control-h: var(--jf-control-h);
}

.field-editor-section .toolbar {
  margin-bottom: 14px;
  align-items: center;
  min-height: var(--control-h);
}

.field-editor-section .toolbar .btn {
  min-height: var(--control-h);
  padding-top: 0;
  padding-bottom: 0;
  display: inline-flex;
  align-items: center;
}

.field-editor-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: fit-content;
  max-width: 100%;
}

/* ========== Field row (card) ========== */
.field-row {
  display: grid;
  grid-template-columns: minmax(0, 100px) minmax(12ch, 1fr) minmax(90px, auto) minmax(44px, auto);
  align-items: start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--jf-surface);
  border: 1px solid var(--jf-border);
  border-radius: var(--jf-radius);
  box-shadow: var(--jf-shadow);
}

body.dark .field-row {
  background: var(--jf-surface);
  border-color: var(--jf-border);
}

.field-row-array {
  grid-template-columns: 32px minmax(12ch, 1fr) minmax(90px, auto) minmax(44px, auto);
}

.field-key,
.field-value-input,
.field-value-json {
  padding: 9px 12px;
  font-size: 14px;
  border: 1px solid var(--jf-border);
  border-radius: var(--jf-radius-sm);
  background: var(--jf-surface-raised);
  color: var(--jf-text);
  min-width: 0;
  font-family: var(--jf-font-sans);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field-key:focus,
.field-value-input:focus,
.field-value-json:focus {
  outline: none;
  border-color: var(--jf-accent);
  box-shadow: 0 0 0 2px var(--jf-accent-subtle);
}

.field-key {
  font-family: var(--jf-font-mono);
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.field-value-input {
  min-width: 0;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow-x: auto;
}

.field-value-input:not([type="number"]) {
  min-width: 10ch;
  max-width: 100%;
  width: 10ch;
}

.field-value-input[type="number"] {
  max-width: min(100%, 12ch);
  width: 12ch;
}

.field-value-json {
  width: 100%;
  max-width: 100%;
  min-height: 80px;
  font-family: var(--jf-font-mono);
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  box-sizing: border-box;
}

body.dark .field-key,
body.dark .field-value-input,
body.dark .field-value-json {
  background: var(--jf-surface-raised);
  color: var(--jf-text);
  border-color: var(--jf-border);
}

.field-value-cell {
  min-width: 0;
  overflow: hidden;
  position: relative;
  isolation: isolate;
}

.field-row .field-type-select,
.field-row .btn-icon-delete {
  position: relative;
  z-index: 1;
}

.field-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  min-height: var(--control-h, 40px);
  height: var(--control-h, 40px);
  font-family: var(--jf-font-mono);
  font-size: 13px;
  color: var(--jf-text-muted);
}

.field-type-select {
  height: var(--control-h, 40px);
  min-height: var(--control-h, 40px);
  padding: 0 10px;
  font-size: 12px;
  line-height: normal;
  color: var(--jf-text);
  background: var(--jf-surface-raised);
  border: 1px solid var(--jf-border);
  border-radius: var(--jf-radius-sm);
  cursor: pointer;
  min-width: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  font-family: var(--jf-font-sans);
}

.field-type-select:focus {
  outline: none;
  border-color: var(--jf-accent);
}

body.dark .field-type-select {
  background: var(--jf-surface-raised);
  color: var(--jf-text);
  border-color: var(--jf-border);
}

.field-type {
  display: inline-block;
  padding: 4px 8px;
  font-size: 11px;
  color: var(--jf-text-muted);
  background: var(--jf-surface-raised);
  border-radius: 4px;
  white-space: nowrap;
}

/* ========== Icon buttons ========== */
.btn-icon {
  min-height: var(--control-h, 40px);
  padding: 0 14px;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon-delete {
  min-height: var(--control-h, 40px);
  min-width: var(--control-h, 40px);
  padding: 0;
  color: var(--jf-text-muted);
  border-color: transparent;
  background: transparent;
  border-radius: var(--jf-radius-sm);
}

.btn-icon-delete:hover {
  color: #dc2626;
  background: rgba(220, 38, 38, 0.1);
  border-color: transparent;
}

body.dark .btn-icon-delete:hover {
  color: #f87171;
  background: rgba(248, 113, 113, 0.15);
}

.btn-icon-svg {
  display: block;
  width: 18px;
  height: 18px;
}

.btn-icon-add {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-icon-add .btn-icon-svg-add {
  flex-shrink: 0;
}

.btn-icon-add .btn-icon-label {
  white-space: nowrap;
}

#fieldErrorMsg {
  margin-top: 14px;
}

/* ========== Nested blocks & rainbow indent ========== */
.field-nested-toolbar {
  margin-top: 12px;
  margin-bottom: 4px;
}

.field-value-nested-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-nested-value-toolbar {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.field-nested-value-toolbar .btn-expand,
.field-nested-value-toolbar .btn-collapse {
  min-height: var(--control-h, 40px);
  font-size: 0.8125rem;
}

.field-nested-block-full {
  width: 100%;
  margin-top: 10px;
  margin-bottom: 6px;
  padding: 14px 0 14px 14px;
  border-left: 4px solid var(--jf-accent);
  box-sizing: border-box;
  border-radius: 0 var(--jf-radius-sm) var(--jf-radius-sm) 0;
}

.field-nested-block-full[data-level="1"] { border-left-color: #0d9488; }
.field-nested-block-full[data-level="2"] { border-left-color: #16a34a; }
.field-nested-block-full[data-level="3"] { border-left-color: #d97706; }
.field-nested-block-full[data-level="4"] { border-left-color: #7c3aed; }
.field-nested-block-full[data-level="5"] { border-left-color: #db2777; }
.field-nested-block-full[data-level="6"] { border-left-color: #0d9488; }
.field-nested-block-full[data-level="7"] { border-left-color: #dc2626; }
.field-nested-block-full[data-level="8"] { border-left-color: #0891b2; }
.field-nested-block-full[data-level="9"] { border-left-color: #0d9488; }
.field-nested-block-full[data-level="10"] { border-left-color: #16a34a; }
.field-nested-block-full[data-level="11"] { border-left-color: #d97706; }
.field-nested-block-full[data-level="12"] { border-left-color: #7c3aed; }

body.dark .field-nested-block-full[data-level="1"] { border-left-color: #14b8a6; }
body.dark .field-nested-block-full[data-level="2"] { border-left-color: #22c55e; }
body.dark .field-nested-block-full[data-level="3"] { border-left-color: #f59e0b; }
body.dark .field-nested-block-full[data-level="4"] { border-left-color: #8b5cf6; }
body.dark .field-nested-block-full[data-level="5"] { border-left-color: #ec4899; }
body.dark .field-nested-block-full[data-level="6"] { border-left-color: #14b8a6; }
body.dark .field-nested-block-full[data-level="7"] { border-left-color: #ef4444; }
body.dark .field-nested-block-full[data-level="8"] { border-left-color: #06b6d4; }
body.dark .field-nested-block-full[data-level="9"] { border-left-color: #14b8a6; }
body.dark .field-nested-block-full[data-level="10"] { border-left-color: #22c55e; }
body.dark .field-nested-block-full[data-level="11"] { border-left-color: #f59e0b; }
body.dark .field-nested-block-full[data-level="12"] { border-left-color: #8b5cf6; }

.field-editor-list-nested {
  margin-top: 10px;
  width: fit-content;
  max-width: 100%;
}

.field-editor-list-nested .field-row {
  background: var(--jf-surface-raised);
}

body.dark .field-editor-list-nested .field-row {
  background: var(--jf-surface-raised);
}

/* ========== Responsive ========== */
@media (max-width: 767px) {
  .container {
    padding: 12px 14px;
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }

  .btn-hint {
    display: none;
  }

  .toolbar-group-options {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    width: 100%;
  }

  .toolbar {
    gap: 8px;
  }

  .btn {
    min-height: 44px;
    padding: 10px 14px;
  }

  .btn-icon-delete {
    min-width: 44px;
    min-height: 44px;
  }

  .btn-icon-svg {
    width: 20px;
    height: 20px;
  }

  .json-input-wrap {
    min-height: 280px;
  }

  .json-input-inner textarea {
    min-height: 276px;
  }

  .line-numbers {
    width: 2.5em;
    padding: 12px 6px 12px 10px;
  }

  .text-tools-row {
    flex-direction: column;
    align-items: stretch;
  }

  .text-tools-actions {
    justify-content: flex-start;
  }

  .error-box {
    flex-direction: column;
  }

  .field-editor-list,
  .field-editor-list-nested {
    width: 100%;
  }

  /* Mobile: stacked layout so key/value get full width, no truncation */
  .field-row {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto auto;
    gap: 10px 12px;
    padding: 12px 14px;
    align-items: center;
  }

  .field-row > *:nth-child(1) {
    grid-row: 1;
    grid-column: 1;
    min-width: 0;
  }

  .field-row > *:nth-child(2) {
    grid-row: 2;
    grid-column: 1 / -1;
    min-width: 0;
  }

  .field-row > *:nth-child(3) {
    grid-row: 3;
    grid-column: 1 / -1;
  }

  .field-row > *:nth-child(4) {
    grid-row: 1;
    grid-column: 2;
    align-self: start;
  }

  .field-row .field-key {
    width: 100%;
    min-width: 0;
  }

  .field-value-cell {
    min-width: 0;
    width: 100%;
  }

  .field-row .field-type-select {
    width: 100%;
    max-width: 100%;
  }

  .field-index {
    width: 28px;
    font-size: 13px;
  }

  .field-type-select {
    min-width: 0;
    width: 100%;
  }

  .field-nested-toolbar {
    margin-top: 14px;
    margin-bottom: 6px;
  }

  .field-nested-toolbar .btn-icon-add {
    width: 100%;
    justify-content: center;
    min-height: 44px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: min(98vw, 1100px);
    padding: 20px 28px;
  }

  .container.field-editor-active {
    max-width: min(98vw, 1600px);
    padding: 20px 28px;
  }

  .field-row {
    grid-template-columns: minmax(0, 160px) minmax(14ch, 1fr) minmax(95px, auto) minmax(44px, auto);
    gap: 12px;
    padding: 12px 14px;
  }

  .field-row-array {
    grid-template-columns: 40px minmax(14ch, 1fr) minmax(95px, auto) minmax(44px, auto);
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: min(98vw, 1200px);
    padding: 24px 36px;
  }

  .container.field-editor-active {
    max-width: min(98vw, 2000px);
    padding: 24px 36px;
  }

  .container h1 {
    font-size: 2rem;
  }

  .container h1::before {
    width: 32px;
    height: 32px;
  }

  .field-row {
    grid-template-columns: minmax(0, 240px) minmax(16ch, 1fr) minmax(100px, auto) minmax(44px, auto);
    gap: 14px;
    padding: 14px 16px;
  }

  .field-row-array {
    grid-template-columns: 44px minmax(16ch, 1fr) minmax(100px, auto) minmax(44px, auto);
  }

  .field-key,
  .field-value-input,
  .field-value-json {
    font-size: 14px;
    padding: 10px 12px;
  }

  .field-type-select {
    min-width: 90px;
  }
}