/* ── Keyword Density Checker — tool-specific styles ──────────────────────────
   Global styles are inherited from /css/style.css.
   Colours reference CSS custom properties only — no hardcoded values.
   ─────────────────────────────────────────────────────────────────────────── */

.kdc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card, 8px);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kdc-card__heading {
  font-size: 1.05rem;
  margin: 0;
}

.kdc-input {
  min-height: 180px;
}

.kdc-help {
  margin: -0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.kdc-error {
  margin: 0;
  color: var(--color-danger, #c0392b);
  font-size: 0.875rem;
}

.kdc-options {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border-color);
}

.kdc-options__heading {
  font-size: 0.9rem;
  margin: 0.5rem 0 0;
  color: var(--text-secondary);
}

.kdc-option-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
}

.kdc-checkbox {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  cursor: pointer;
}

.kdc-field-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.kdc-select {
  /* Overrides the global `select { width: 100% }` rule in /css/style.css,
     which would otherwise push the label onto its own line. */
  width: auto;
  min-width: 5rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control, 8px);
  background: var(--bg-secondary, var(--bg-card));
  color: var(--text-primary);
  font-size: 0.875rem;
}

.kdc-mode__buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.kdc-mode-btn {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control, 8px);
  background: var(--bg-secondary, var(--bg-card));
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.875rem;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.kdc-mode-btn:hover {
  border-color: var(--accent);
}

.kdc-mode-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--color-on-accent, #fff);
}

.kdc-table-wrap {
  overflow-x: auto;
}

.kdc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.kdc-table th,
.kdc-table td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.kdc-table th {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.kdc-table td.kdc-density-cell {
  font-variant-numeric: tabular-nums;
}

.kdc-badge-high {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--color-danger, #c0392b);
  color: #fff;
  vertical-align: middle;
}

.kdc-empty-state {
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.kdc-table[hidden],
.kdc-empty-state[hidden] {
  display: none;
}