/* PianoPlayer Independent Documentation Styles */

.docs-layout {
  display: flex;
  max-width: 1440px;
  margin: 0 auto;
  min-height: calc(100vh - 120px);
  position: relative;
}

/* Left Documentation Sidebar */
.docs-sidebar {
  width: 280px;
  flex-shrink: 0;
  border-right: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 24px 16px;
  position: sticky;
  top: 90px;
  height: calc(100vh - 90px);
  overflow-y: auto;
  transition: var(--transition-theme);
}

.docs-search-box {
  margin-bottom: 20px;
  position: relative;
}

.docs-search-input {
  width: 100%;
  padding: 8px 12px 8px 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.docs-search-input:focus {
  border-color: var(--accent-primary);
  background: var(--bg-surface);
  outline: none;
}

.docs-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.docs-menu-group {
  margin-bottom: 24px;
}

.docs-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  padding: 4px 10px;
  margin-bottom: 6px;
}

.docs-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.docs-menu-link {
  display: flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.docs-menu-link:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.docs-menu-link.active {
  background: var(--accent-subtle);
  color: var(--accent-primary);
  font-weight: 600;
}

/* Center Documentation Article */
.docs-content {
  flex: 1;
  padding: 40px 48px;
  max-width: 860px;
}

.docs-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.docs-breadcrumbs a:hover {
  color: var(--accent-primary);
}

/* Markdown Placeholder Card & Container */
.markdown-container {
  color: var(--text-primary);
  line-height: 1.75;
}

.markdown-container h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.markdown-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-subtle);
}

.markdown-container h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--text-primary);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.markdown-container h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.markdown-container p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Callout Alert Box */
.docs-callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  border-left: 4px solid var(--accent-primary);
  background: var(--accent-subtle);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.docs-callout .callout-icon {
  font-size: 1.2rem;
}

.docs-callout .callout-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.docs-callout .callout-content strong {
  color: var(--text-primary);
}

/* Markdown Skeleton / Placeholder Block */
.docs-skeleton-box {
  background: var(--bg-surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 28px 0;
  text-align: center;
}

.docs-skeleton-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.docs-skeleton-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.docs-skeleton-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Sample Codeblock inside Docs */
.code-block-preview {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  overflow-x: auto;
  color: var(--text-primary);
  margin: 20px 0;
}

/* Right Table of Contents */
.docs-toc {
  width: 220px;
  flex-shrink: 0;
  padding: 40px 16px 24px;
  position: sticky;
  top: 90px;
  height: calc(100vh - 90px);
  overflow-y: auto;
}

.docs-toc-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.docs-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 2px solid var(--border-subtle);
  padding-left: 12px;
}

.docs-toc-link {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.docs-toc-link:hover, .docs-toc-link.active {
  color: var(--accent-primary);
}

@media (max-width: 1080px) {
  .docs-toc {
    display: none;
  }
}

@media (max-width: 768px) {
  .docs-layout {
    flex-direction: column;
  }
  .docs-sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
  .docs-content {
    padding: 24px 16px;
  }
}