:root {
  --editor-bg: color-mix(in srgb, var(--surface) 88%, var(--accent-soft));
}

.tool-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.tool-header .lead {
  max-width: 60ch;
}

.trust-line {
  margin-bottom: 1.2rem;
  color: var(--muted);
  font-weight: 600;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  align-items: flex-start;
  justify-content: flex-start;
  margin-bottom: 0.8rem;
}

.utility-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.indent-control {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.indent-control .label {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}

.pill {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}

.pill[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  color: var(--primary);
}

.btn {
  transition: transform 0.08s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn.secondary,
.btn.ghost,
.editor-actions .btn {
  background: var(--surface-muted);
  color: var(--text);
  border-color: var(--border);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.mobile-tabs {
  display: none;
  gap: 0.4rem;
}

.editor-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.editor-card {
  padding: 1.2rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  min-height: 520px;
}

.editor-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  width: 100%;
}

.editor-body {
  flex: 1;
  display: grid;
  grid-template-columns: var(--line-gutter-width, 44px) 1fr;
  gap: 0;
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--editor-bg);
}

.line-numbers {
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  color: var(--muted);
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  text-align: right;
  padding: 0.75rem 0.5rem;
  overflow: auto;
  user-select: none;
  border-right: 1px solid var(--border);
  line-height: 1.6;
  min-width: 44px;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--primary) 45%, var(--border)) transparent;
}

.line-numbers::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.line-numbers::-webkit-scrollbar-track {
  background: transparent;
}

.line-numbers::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--primary) 40%, var(--border));
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: padding-box;
}

.line-number-row {
  display: block;
  text-align: right;
  min-height: calc(0.9rem * 1.6);
  line-height: 1.6;
  white-space: nowrap;
}

.line-number-row.collapsible {
  cursor: pointer;
}

.line-number-row.collapsible::after {
  content: " v";
  font-size: 0.72em;
  color: var(--primary);
}

.line-number-row.collapsible[aria-expanded="false"]::after {
  content: " >";
}

.editor-pane {
  position: relative;
}

.editor-text {
  width: 100%;
  height: 100%;
  min-height: 320px;
  border: none;
  outline: none;
  background: transparent;
  resize: none;
  padding: 0.75rem 1rem;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
  white-space: pre;
  overflow: auto;
}

.editor-view {
  position: absolute;
  inset: 0;
  overflow: auto;
  padding: 0.75rem 1rem;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
  background: transparent;
}

.editor-text,
.editor-view {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--primary) 45%, var(--border)) transparent;
}

.editor-text::-webkit-scrollbar,
.editor-view::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.editor-text::-webkit-scrollbar-track,
.editor-view::-webkit-scrollbar-track {
  background: transparent;
}

.editor-text::-webkit-scrollbar-thumb,
.editor-view::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--primary) 40%, var(--border));
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: padding-box;
}

.editor-view[hidden] {
  display: none;
}

.json-line {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: pre;
  line-height: 1.6;
}

.editor-view.wrap .json-line {
  white-space: pre-wrap;
  word-break: break-word;
  align-items: flex-start;
}

.json-line[hidden] {
  display: none !important;
}

.line-number-row[hidden] {
  display: none !important;
}

.json-toggle {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text);
  font-size: 0.7rem;
  line-height: 1;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  flex: 0 0 auto;
}

.json-toggle.placeholder {
  visibility: hidden;
}

.editor-text.wrap {
  white-space: pre-wrap !important;
  word-break: break-word;
  overflow-wrap: break-word;
}

.editor-view.wrap {
  white-space: pre-wrap !important;
  word-break: break-word;
  overflow-wrap: break-word;
}

.editor-view.wrap .json-line {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
  align-items: flex-start;
}

.editor-view.wrap .json-line span {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
}

.editor-status {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.1rem;
}

.editor-status.is-error {
  color: var(--danger, #e25555);
  font-weight: 600;
}

.status-row {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.2rem;
}

.how-it-works {
  margin-top: 2rem;
  background: var(--surface-muted);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
}

.how-it-works summary {
  cursor: pointer;
  font-weight: 600;
}

.how-it-works ul {
  margin: 0.8rem 0 0 1.2rem;
  color: var(--muted);
}

.copy-toast {
  position: fixed;
  z-index: 1300;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  background: color-mix(in srgb, var(--surface) 92%, var(--primary) 8%);
  color: var(--text);
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--border));
  border-radius: 10px;
  padding: 0.35rem 0.55rem;
  font-size: 0.8rem;
  font-weight: 600;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.output-card.is-fullscreen {
  position: fixed;
  inset: 16px;
  z-index: 50;
  max-width: none;
  max-height: none;
  margin: 0;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.2);
}

.output-card.is-fullscreen .editor-body {
  min-height: calc(100vh - 200px);
}

.output-card.is-fullscreen .editor-head {
  grid-template-columns: 1fr;
  align-items: center;
}

.output-card.is-fullscreen .editor-actions {
  width: 100%;
  justify-content: space-between;
  gap: 0.75rem;
}

.output-card.is-fullscreen .editor-actions #fullscreenOutput {
  order: -1;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--surface) 65%, transparent);
  display: grid;
  place-items: center;
  z-index: 60;
  backdrop-filter: blur(3px);
}

.loading-overlay[hidden] {
  display: none;
}

.loading-card {
  display: grid;
  gap: 0.6rem;
  padding: 1.5rem 2rem;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  text-align: center;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}

.spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 1100px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .utility-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .tool-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .toolbar .btn {
    width: 100%;
  }

  .mobile-tabs {
    display: inline-flex;
  }

  .editor-layout {
    grid-template-columns: 1fr;
  }

  .editor-layout[data-active="input"] .output-card {
    display: none;
  }

  .editor-layout[data-active="output"] .editor-card:first-child {
    display: none;
  }
}

@media (max-width: 520px) {
  .editor-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .editor-actions {
    width: 100%;
  }

  .editor-actions .btn {
    width: 100%;
  }
}