/* ==========================================================================
   ZeroTools — Tool Page Layout & Styles
   File: css/tool.css
   ========================================================================== */

/* --- 1. PAGE LAYOUT WRAPPER --- */
.tool-page-wrapper {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--space-8);
  max-width: var(--tool-max-width);
  margin: var(--space-10) auto;
  padding: 0 var(--space-6);
  align-items: start; /* Prevents sidebar from stretching full height */
}

/* --- 2. SIDEBAR NAVIGATION --- */
.tool-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  display: flex;
  flex-direction: column;
}

.sidebar-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
  font-weight: var(--weight-medium);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav a {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  text-decoration: none;
  padding: 6px 8px;
  margin-left: -8px; /* Optically align text while allowing background padding */
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.sidebar-nav a:hover {
  color: var(--accent);
  background-color: var(--accent-dim);
}

.sidebar-ad {
  width: 160px;
  margin-top: var(--space-6);
}

/* --- 3. MAIN CONTENT AREA --- */
.tool-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  min-width: 0; /* Prevent flex blowouts with pre/code tags */
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb span {
  color: var(--border-strong);
}

/* Tool Header */
.tool-header-meta {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-3);
}

.tool-privacy-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
}

.tool-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  font-family: var(--font-sans);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.tool-intro {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
  max-width: 650px;
}

/* --- 4. TOOL INTERFACE (The App Area) --- */
.tool-interface {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  background: var(--bg-secondary);
  padding: var(--space-6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  font-weight: var(--weight-medium);
}

.input-actions, .output-actions {
  display: flex;
  gap: 8px;
}

.tool-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) 0;
  border-top: 1px dashed var(--border-default);
  border-bottom: 1px dashed var(--border-default);
}

/* Form Controls within Options */
.tool-options label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.tool-options label:hover {
  color: var(--text-primary);
}

.tool-options select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  outline: none;
  cursor: pointer;
}

.tool-options select:focus {
  border-color: var(--accent);
}

.tool-actions {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.output-status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  padding-top: var(--space-2);
  text-align: right;
  min-height: 24px; /* Reserve space even when empty */
}

/* --- 5. EXPLAINER CONTENT (SEO & Docs) --- */
.tool-explainer {
  max-width: 720px;
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

.tool-explainer h2 {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.tool-explainer h2:first-child {
  margin-top: 0;
}

.tool-explainer p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-4);
}

.tool-explainer ul, 
.tool-explainer ol {
  color: var(--text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.tool-explainer li {
  margin-bottom: var(--space-2);
}

.tool-explainer li::marker {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* --- 6. RELATED TOOLS GRID --- */
.related-tools {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.related-tools h2 {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-5);
  color: var(--text-primary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

/* --- 7. RESPONSIVE BREAKPOINTS --- */
@media (max-width: 900px) {
  .tool-page-wrapper {
    grid-template-columns: 1fr;
  }
  
  .tool-sidebar {
    display: none; /* Hide sidebar on mobile/tablet to prioritize main tool */
  }
}

@media (max-width: 600px) {
  .tool-interface {
    padding: var(--space-4);
  }
  
  .related-grid {
    grid-template-columns: 1fr;
  }

  .tool-options {
    flex-direction: column;
    align-items: flex-start;
  }
}