/**
 * Chain Matrix — tools.css
 * Tool-specific layout, panels, converters, outputs, examples, sidebars
 */

/* ============================================================
   Tool Page Layout
   ============================================================ */
.tool-page {
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-8) 0 var(--space-16);
}

.tool-page-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
}

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

/* ============================================================
   Tool Header
   ============================================================ */
.tool-header {
  margin-bottom: var(--space-6);
}

.tool-header-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.tool-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.tool-description {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 680px;
}

.tool-description code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--text-code);
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 3px;
}

/* Category badges */
.tool-category-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tool-category-badge.hash {
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.tool-category-badge.ethereum {
  background: rgba(98, 126, 234, 0.12);
  color: #627eea;
  border: 1px solid rgba(98, 126, 234, 0.25);
}

.tool-category-badge.bitcoin {
  background: rgba(247, 147, 26, 0.12);
  color: #f7931a;
  border: 1px solid rgba(247, 147, 26, 0.25);
}

.tool-category-badge.solana {
  background: rgba(153, 69, 255, 0.12);
  color: #9945ff;
  border: 1px solid rgba(153, 69, 255, 0.25);
}

.tool-category-badge.utility {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

/* ============================================================
   Validation Badges
   ============================================================ */
.validation-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1-5) var(--space-3);
  border-radius: var(--radius-full);
  transition: all 0.2s ease;
}

.validation-badge.empty {
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border-muted);
}

.validation-badge.valid {
  color: var(--color-success);
  background: var(--color-success-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.validation-badge.valid::before { content: '✓ '; }

.validation-badge.invalid {
  color: var(--color-error);
  background: var(--color-error-bg);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.validation-badge.invalid::before { content: '✗ '; }

/* ============================================================
   Tool Controls
   ============================================================ */
.tool-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

/* ============================================================
   Tabs
   ============================================================ */
.tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--surface-2);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-lg);
  padding: 4px;
  margin-bottom: var(--space-4);
  width: fit-content;
}

.tab {
  padding: var(--space-1-5) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  background: var(--surface-1);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   Workspace
   ============================================================ */
.tool-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.tool-workspace.single-panel {
  grid-template-columns: 1fr;
}

@media (max-width: 640px) {
  .tool-workspace { grid-template-columns: 1fr; }
}

/* ============================================================
   Tool Panels
   ============================================================ */
.tool-panel {
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: border-color 0.2s ease;
}

.tool-panel:focus-within {
  border-color: var(--border-accent);
}

.tool-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-muted);
  background: var(--surface-glass);
}

.tool-panel-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.tool-panel-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ============================================================
   Textarea & Inputs
   ============================================================ */
.tool-textarea {
  width: 100%;
  min-height: 160px;
  padding: var(--space-4);
  background: transparent;
  border: none;
  outline: none;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: 1.6;
}

.tool-textarea::placeholder { color: var(--text-dim); }

.tool-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  outline: none;
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all 0.2s;
}

.tool-input::placeholder { color: var(--text-dim); font-family: var(--font-sans); }

/* ============================================================
   Output Display
   ============================================================ */
.output-display {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-code);
  word-break: break-all;
  min-height: 60px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.output-display:empty::before {
  content: 'Output will appear here…';
  color: var(--text-dim);
  font-style: italic;
  font-family: var(--font-sans);
}

.output-display-lg {
  padding: var(--space-5) var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--text-code);
  word-break: break-all;
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  min-height: 60px;
  letter-spacing: 0.05em;
}

/* JSON output */
.json-output {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  word-break: break-word;
  white-space: pre-wrap;
  min-height: 160px;
  max-height: 500px;
  overflow-y: auto;
}

/* JSON syntax highlighting */
.json-key    { color: #7c9ef0; }
.json-string { color: #7ec8a0; }
.json-number { color: #f7a84b; }
.json-boolean { color: #e06c75; }
.json-null   { color: #abb2bf; }
.json-error  { color: var(--color-error); }

/* ============================================================
   Copy Button
   ============================================================ */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.copy-btn.copied {
  color: var(--color-success);
  border-color: var(--color-success);
}

/* ============================================================
   Converter Layout
   ============================================================ */
.converter-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.converter-field {
  flex: 1;
  min-width: 200px;
}

.converter-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.converter-arrow {
  font-size: 1.5rem;
  color: var(--text-dim);
  flex-shrink: 0;
  padding-top: 24px; /* align with input */
}

.converter-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s ease;
  backdrop-filter: blur(8px);
}

.converter-input:focus {
  border-color: var(--border-accent);
}

.converter-input::placeholder { color: var(--text-dim); font-family: var(--font-sans); }

/* ============================================================
   Range Slider
   ============================================================ */
.range-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.range-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.range-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--accent-primary);
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--surface-2);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
  transition: box-shadow 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 6px rgba(139, 92, 246, 0.3);
}

/* ============================================================
   Examples Section
   ============================================================ */
.tool-examples {
  margin-bottom: var(--space-6);
}

.tool-examples-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.example-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.example-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--surface-glass);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  backdrop-filter: blur(8px);
}

.example-item:hover {
  border-color: var(--border-accent);
  background: var(--surface-2);
}

.example-item:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.example-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-code);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.example-use-btn {
  flex-shrink: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-primary);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0 var(--space-2);
  transition: transform 0.15s ease;
}

.example-item:hover .example-use-btn { transform: translateX(3px); }

/* ============================================================
   Error Display
   ============================================================ */
.error-msg {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-error-bg);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-error);
  margin-top: var(--space-4);
}

/* ============================================================
   Tool FAQ
   ============================================================ */
.tool-faq {
  margin-top: var(--space-8);
  border-top: 1px solid var(--border-muted);
  padding-top: var(--space-6);
}

.tool-faq-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

/* ============================================================
   Sidebar
   ============================================================ */
.tool-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
}

.sidebar-card {
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  backdrop-filter: blur(12px);
}

.sidebar-card-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.related-tools {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.related-tool-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s ease;
}

.related-tool-link:hover {
  background: var(--surface-2);
  color: var(--text-primary);
}

.related-tool-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid transparent;
}

/* ============================================================
   Shortcut Hints
   ============================================================ */
.shortcut-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.shortcut-hint kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 5px;
  background: var(--surface-2);
  border: 1px solid var(--border-muted);
  border-radius: 3px;
  color: var(--text-secondary);
}