:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e1e4e8;
  --color-text: #1f2328;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #16a34a;
  --color-error: #dc2626;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.page-wide {
  max-width: 960px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  margin: 0 0 4px;
}

.subtitle {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 14px;
}

.home-link {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  padding-top: 4px;
}

.home-link:hover {
  text-decoration: underline;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
}

.hint {
  color: var(--color-text-muted);
  font-size: 12px;
  margin: 6px 0 0;
}

.form-hint {
  color: var(--color-text-muted);
  font-size: 13px;
}

.password-field {
  display: flex;
  gap: 8px;
}

.password-field input {
  flex: 1;
}

.link-button {
  flex-shrink: 0;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
  background: #eef2ff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}

.link-button:hover {
  background: #dce4fd;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: #eef2ff;
  color: var(--color-primary);
}

.btn-small {
  padding: 6px 12px;
  font-size: 13px;
  background: var(--color-success);
  color: #fff;
}

.error-text {
  color: var(--color-error);
  font-size: 14px;
  margin: 12px 0 0;
}

.action-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

textarea.mono,
pre.mono,
code.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

textarea {
  width: 100%;
  min-height: 160px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  resize: vertical;
}

/* Scoped tới .field/.password-field (không phải input[type] trần toàn cục) để không đụng độ
   specificity với .filter-input (JSON Format) — 2 selector đó cùng độ ưu tiên (0,1,1) nên rule nào
   định nghĩa sau sẽ thắng, ép width:100%/padding lạ vào 1 input vốn nằm cạnh nút trong 1 hàng ngang. */
.field input[type='text'],
.field input[type='password'],
.field input[type='email'],
.field input[type='search'],
.field input[type='url'],
.field input[type='tel'],
.password-field input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--color-text);
  background: var(--color-surface);
}

.field input[type='text'],
.field input[type='password'],
.field input[type='email'],
.field input[type='search'],
.field input[type='url'],
.field input[type='tel'],
.password-field input,
.filter-input,
textarea,
select,
input[type='number'] {
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input[type='text']:focus,
.field input[type='password']:focus,
.field input[type='email']:focus,
.field input[type='search']:focus,
.field input[type='url']:focus,
.field input[type='tel']:focus,
.password-field input:focus,
.filter-input:focus,
textarea:focus,
select:focus,
input[type='number']:focus,
input[type='color']:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.textarea-lg {
  min-height: 220px;
}

.result-card {
  margin-top: 20px;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.result-header label {
  font-weight: 600;
  font-size: 14px;
}

.result-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-output {
  margin: 0;
  max-height: 480px;
  overflow: auto;
  padding: 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.result-row-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
}

.result-row-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
  overflow-x: auto;
  white-space: nowrap;
}

@media (max-width: 560px) {
  .result-row {
    grid-template-columns: 1fr;
  }
}

.tabbar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0;
}

.tab-button {
  border: none;
  background: none;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab-button:hover {
  color: var(--color-text);
}

.tab-button.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tok-key {
  color: #1a56db;
  font-weight: 600;
}

.tok-string {
  color: #15803d;
}

.tok-number {
  color: #b45309;
}

.tok-boolean {
  color: #9333ea;
  font-weight: 600;
}

.tok-null {
  color: var(--color-text-muted);
  font-style: italic;
}

.filter-input {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

select,
input[type='color'],
input[type='number'] {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--color-surface);
}

input[type='color'] {
  padding: 3px;
  height: 36px;
  cursor: pointer;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
}

.checkbox-label {
  font-weight: 400;
  font-size: 13px;
}

.checkbox-label-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  font-size: 13px;
  cursor: pointer;
}