/* ===========================
   SVG Filter Tools - Local Styles
   =========================== */

/* --- Tool page layout --- */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
}

/* --- Preview panel --- */
.preview-panel {
  background: var(--demo-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preview-panel h2 {
  font-size: 1rem;
  margin: 0;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preview-svg-wrap {
  background: var(--demo-svg-bg);
  border: 1px dashed var(--demo-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  overflow: hidden;
}

.preview-svg-wrap svg {
  display: block;
  width: 100%;
  height: auto;
}

/* --- Controls panel --- */
.controls-panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.controls-panel h2 {
  font-size: 1rem;
  margin: 0;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Control groups --- */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  background: var(--bg-surface);
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.control-group label .value-display {
  font-weight: 400;
  color: var(--accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
}

/* Editable number input that replaces value-display */
.value-input {
  width: 60px;
  padding: 0.15rem 0.3rem;
  font-size: 0.82rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: var(--accent);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  text-align: right;
}

.value-input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.control-group .param-hint {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

.control-group input[type="range"] {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.control-group input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.control-group input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.control-group select {
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
}

.control-group select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.control-group input[type="color"] {
  width: 40px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  padding: 2px;
  background: var(--bg-surface);
}

.control-group input[type="number"] {
  width: 80px;
  padding: 0.3rem 0.5rem;
  font-size: 0.85rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.control-group input[type="number"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.control-group input[type="text"] {
  width: 100%;
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.control-group input[type="text"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Inline controls (side by side) */
.control-row {
  display: flex;
  gap: 1rem;
  align-items: end;
}

.control-row .control-group {
  flex: 1;
}

/* --- Code output panel --- */
.code-output {
  margin-top: 1.5rem;
  background: var(--code-block-bg);
  border: 1px solid var(--code-block-border);
  border-radius: 8px;
  overflow: hidden;
}

.code-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.code-output-header h2 {
  font-size: 0.85rem;
  margin: 0;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-output-header .copy-btn {
  position: static;
  opacity: 1;
}

.code-output pre {
  margin: 0;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--code-block-text);
}

.code-output pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: inherit;
}

/* --- Target image selector --- */
.target-selector {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

.target-selector label {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
}

.target-selector .target-buttons {
  display: flex;
  gap: 0.5rem;
}

.target-btn {
  flex: 1;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-align: center;
  white-space: nowrap;
}

.target-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.target-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* --- Tool index page --- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.tool-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  text-decoration: none;
}

.tool-card h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.tool-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
}

.tool-card .tool-category {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-h3);
  font-weight: 600;
}

/* --- Breadcrumb / navigation --- */
.tool-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.tool-nav a {
  color: var(--muted);
}

.tool-nav span {
  color: var(--muted);
}

/* --- Related links section --- */
.related-links {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.related-links h2 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
  border-bottom: none;
  padding-bottom: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.related-links ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.related-links li a {
  font-size: 0.9rem;
}

/* --- Checkbox toggle for options --- */
.control-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--accent);
}

.control-group .checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Inline link/lock toggle (not a parameter, just a helper) */
.control-group.link-toggle {
  border: none;
  background: none;
  padding: 0;
  margin-top: -0.5rem;
}

.control-group.link-toggle label,
.link-toggle label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--muted);
  cursor: pointer;
}

/* Sub-controls within a single parameter group (e.g. X/Y sliders) */
.control-sub {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.control-sub label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
}

.link-toggle {
  margin-top: 0.25rem;
}

/* --- Matrix input grid (for feConvolveMatrix, feColorMatrix) --- */
.matrix-grid {
  display: grid;
  gap: 4px;
}

.matrix-grid input {
  width: 100%;
  padding: 0.25rem;
  font-size: 0.78rem;
  text-align: center;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.matrix-grid input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* --- Responsive adjustments --- */
@media (max-width: 600px) {
  .control-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .related-links ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}