:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-border: #e3e5ea;
  --text: #1c1f26;
  --text-soft: #5b616e;
  --text-faint: #8a909c;
  --accent: #3355ff;
  --accent-soft: #eaeeff;
  --shadow: 0 1px 2px rgba(20, 24, 40, 0.06), 0 8px 24px rgba(20, 24, 40, 0.06);
  --radius: 14px;
  --editor-font: "SFMono-Regular", "JetBrains Mono", "Menlo", "Consolas", monospace;
  --ui-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --editor-size: 16px;
  --editor-line: 2.6;
  --editor-pad-y: 1.5em;
  --editor-pad-x: 1em;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #171a21;
    --panel-border: #262b35;
    --text: #e7e9ee;
    --text-soft: #a2a8b6;
    --text-faint: #6d7480;
    --accent: #7f96ff;
    --accent-soft: #1d2440;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--ui-font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* ---------- masthead ---------- */
.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.masthead h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.02em;
}

.masthead p {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 15px;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  font-size: 13px;
  color: var(--text-soft);
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background 0.2s ease;
}

.status[data-state="loading"] .status-dot {
  background: var(--accent);
  animation: pulse 1s ease-in-out infinite;
}
.status[data-state="ok"] .status-dot {
  background: #22b07d;
}
.status[data-state="error"] .status-dot {
  background: #e0564f;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

/* ---------- panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-head h2 {
  margin: 0;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-soft);
}

.hint {
  font-size: 12.5px;
  color: var(--text-faint);
}

/* ---------- editor with highlight overlay ---------- */
.editor {
  position: relative;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: var(--bg);
  overflow: hidden;
}

/* The text-bearing elements must share identical metrics so the transparent
 * textarea's caret lines up with the highlighted backdrop text. Keep these two
 * selectors in lockstep. white-space lives here (NOT on .backdrop) so the HTML
 * source whitespace around #highlights is not rendered. */
.highlights,
#input {
  font-family: var(--editor-font);
  font-size: var(--editor-size);
  line-height: var(--editor-line);
  padding: var(--editor-pad-y) var(--editor-pad-x);
  letter-spacing: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  border: 0;
  margin: 0;
}

.backdrop {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  color: var(--text);
}

.highlights {
  min-height: 100%;
}

#input {
  position: relative;
  display: block;
  width: 100%;
  min-height: 240px;
  resize: none;
  overflow: hidden;
  background: transparent;
  color: transparent;
  caret-color: var(--text);
  outline: none;
}

#input::selection {
  background: rgba(51, 85, 255, 0.25);
}

/* highlight marks */
mark.pii {
  position: relative;
  border-radius: 4px;
  padding: 0.05em 0.12em;
  color: inherit;
  background: var(--pii-bg, var(--accent-soft));
  box-shadow: inset 0 -2px 0 0 var(--pii-line, var(--accent));
}

mark.pii > .tag {
  position: absolute;
  left: 0;
  top: -1.15em;
  font-family: var(--ui-font);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  padding: 1px 5px;
  border-radius: 5px;
  white-space: nowrap;
  color: var(--pii-tag-text, #fff);
  background: var(--pii-line, var(--accent));
  pointer-events: none;
  user-select: none;
}

/* ---------- legend ---------- */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-soft);
  padding: 3px 9px 3px 7px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

.legend-count {
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

/* ---------- output ---------- */
.output {
  font-family: var(--editor-font);
  font-size: var(--editor-size);
  line-height: 1.9;
  white-space: pre-wrap;
  word-wrap: break-word;
  min-height: 60px;
  color: var(--text);
}

.output .token {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 4px;
  padding: 0.05em 0.3em;
  font-weight: 600;
  font-size: 0.85em;
}

.ghost-btn {
  font-family: var(--ui-font);
  font-size: 12.5px;
  color: var(--text-soft);
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 7px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.ghost-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- config ---------- */
.config {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.config > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  user-select: none;
}
.config > summary::-webkit-details-marker {
  display: none;
}
.config > summary::before {
  content: "▸";
  color: var(--text-faint);
  transition: transform 0.15s ease;
  font-size: 12px;
}
.config[open] > summary::before {
  transform: rotate(90deg);
}

.summary-label {
  font-size: 14px;
  font-weight: 600;
}
.summary-sub {
  font-size: 12.5px;
  color: var(--text-faint);
  margin-left: auto;
}

.config-body {
  padding: 4px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  border-top: 1px solid var(--panel-border);
}

.config-group h3 {
  margin: 16px 0 4px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

.config-note {
  margin: 0 0 12px;
  font-size: 12.5px;
  color: var(--text-faint);
  max-width: 60ch;
}

.label-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px 16px;
}

.label-grid label,
.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  cursor: pointer;
}

.toggle {
  font-weight: 600;
}

.gen-fields {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}
.gen-fields[hidden] {
  display: none;
}

/* Fixed generative fields: label on the left, input on the right. */
.field {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-soft);
}

.field > span {
  font-weight: 500;
}

/* Fields whose control is taller than one line align their label to the top. */
.field-top {
  align-items: start;
}
.field-top > span {
  padding-top: 8px;
}

.field-input {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.field-input textarea {
  font-family: var(--editor-font);
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 8px 10px;
  outline: none;
  width: 100%;
  resize: vertical;
  white-space: pre;
}
.field-input textarea:focus {
  border-color: var(--accent);
}
.field-input textarea[aria-invalid="true"] {
  border-color: #e0564f;
}

.field-help {
  font-size: 11.5px;
  color: var(--text-faint);
}
.field-error {
  font-size: 11.5px;
  color: #e0564f;
}

.field input,
.label-desc-row input {
  font-family: var(--ui-font);
  font-size: 13.5px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 8px 10px;
  outline: none;
  width: 100%;
}
.field input:focus,
.label-desc-row input:focus {
  border-color: var(--accent);
}

/* Label + description pairs */
.label-desc {
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--panel-border);
}

.label-desc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.label-desc-head h4 {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

.label-desc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.label-desc-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
}

.label-desc-row .ld-label {
  font-family: var(--editor-font);
  font-size: 12.5px;
  text-transform: uppercase;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: none;
  font-size: 18px;
  line-height: 1;
  color: var(--text-faint);
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.icon-btn:hover {
  color: #e0564f;
  border-color: #e0564f;
}

input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
}