/* ─── Shared tool layout ──────────────────────────── */

.csv-viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.csv-viewer-header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.csv-viewer-header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.csv-back-link {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-decoration: none;
}
.csv-back-link:hover { color: var(--color-primary); }

.csv-viewer-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-emphasized);
  margin: 0;
}

.csv-viewer-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.tool-toggle-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

/* ─── Toggle ─────────────────────────────────────── */

.csv-toggle {
  display: flex;
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.csv-toggle-btn {
  padding: 0.3rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  background: none;
  border: none;
  border-right: 1.5px solid var(--color-border);
  cursor: pointer;
  color: var(--color-text-muted);
  transition: background 0.1s, color 0.1s;
}
.csv-toggle-btn:last-child { border-right: none; }
.csv-toggle-btn.active {
  background: var(--color-primary);
  color: light-dark(white, black);
}
.csv-toggle-btn:not(.active):hover {
  background: var(--color-background-link-hover);
  color: var(--color-text);
}

/* ─── Single-panel layout ────────────────────────── */

.csv-tool-layout {
  height: calc(100vh - 12rem);
  min-height: 300px;
}

.csv-hidden { display: none !important; }

/* ─── Input panel ────────────────────────────────── */

.csv-input-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

.csv-textarea {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: none;
  padding: 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-background-input);
  color: var(--color-text);
  outline: none;
  line-height: 1.5;
}
.csv-textarea:focus {
  border-color: var(--color-primary);
}

/* ─── Output panel ───────────────────────────────── */

.csv-output-panel {
  border: 1.5px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--color-background-card);
  position: relative;
  height: 100%;
}

.panel-content {
  height: 100%;
  overflow: auto;
}

.panel-action-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: inherit;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  color: var(--color-text-muted);
  opacity: 0.5;
  z-index: 2;
  transition: opacity 0.15s, background 0.15s, color 0.15s, border-color 0.15s;
}
.panel-action-btn:hover {
  opacity: 1;
  background: var(--color-background-link-hover);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.csv-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 2rem;
}

/* ─── CSV table ──────────────────────────────────── */

.csv-table {
  border-collapse: collapse;
  width: max-content;
  min-width: 100%;
  font-size: 0.85rem;
}

.csv-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
}

.csv-th {
  background: var(--color-background);
  color: var(--color-text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 2px solid var(--color-border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.csv-th:hover { color: var(--color-primary); }
.csv-th::after { content: ''; margin-left: 0.35rem; }
.csv-th[data-sort="asc"]::after  { content: '\25b2'; color: var(--color-primary); }
.csv-th[data-sort="desc"]::after { content: '\25bc'; color: var(--color-primary); }

.csv-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  white-space: nowrap;
}

.csv-table tbody tr:nth-child(even) td {
  background: var(--color-background-alternate);
}

.csv-table tbody tr:hover td {
  background: var(--color-background-link-hover);
}

/* ─── JSON formatter ─────────────────────────────── */

.json-output {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-text);
  padding: 0.75rem;
  margin: 0;
  white-space: pre;
}

.json-error {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: light-dark(#cf222e, #ff7b72);
  padding: 2rem;
  text-align: center;
}

/* ─── Markdown preview ───────────────────────────────── */

.md-preview {
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text);
}

.md-preview h1,
.md-preview h2,
.md-preview h3,
.md-preview h4 {
  color: var(--color-text-emphasized);
  margin: 1.2em 0 0.4em;
  line-height: 1.3;
}
.md-preview h1 { font-size: 1.5rem; }
.md-preview h2 { font-size: 1.2rem; }
.md-preview h3 { font-size: 1rem; }

.md-preview p  { margin: 0.6em 0; }
.md-preview ul,
.md-preview ol { margin: 0.5em 0; padding-left: 1.5em; }
.md-preview li { margin: 0.2em 0; }

.md-preview a  { color: var(--color-primary); }

.md-preview blockquote {
  border-left: 3px solid var(--color-primary);
  margin: 0.75em 0;
  padding: 0.25em 0.85em;
  color: var(--color-text-muted);
}

.md-preview code {
  font-family: var(--font-mono);
  font-size: 0.83em;
  background: var(--color-background-input);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 0.1em 0.4em;
}

.md-preview pre {
  background: var(--color-background-input);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 0.75rem;
  overflow: auto;
  margin: 0.75em 0;
}
.md-preview pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
}

.md-preview table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
  margin: 0.75em 0;
}
.md-preview table th {
  background: var(--color-background-input);
  padding: 0.4em 0.75em;
  text-align: left;
  border-bottom: 2px solid var(--color-border);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}
.md-preview table td {
  padding: 0.35em 0.75em;
  border-bottom: 1px solid var(--color-border);
}
.md-preview table tbody tr:nth-child(even) td {
  background: var(--color-background-alternate);
}

.md-preview hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 1.25em 0;
}