/*
 * courses.css - Specific Styling for the Coffee CLI OP-University
 * Requires style.css to be loaded prior for theme variables.
 */

/* Course Navigation Tabs (inline in navbar) */
.course-tabs {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.course-tab {
  padding: 0.5rem 1.25rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.2s ease;
}

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

.course-tab.active {
  color: var(--brand-color);
  background: hsla(24, 80%, 50%, 0.08);
}

/* Placeholder (Coming Soon) Pages */
.course-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 10rem);
  text-align: center;
}

.placeholder-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-highlight);
  margin-bottom: 1rem;
}

.placeholder-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-family: var(--font-mono);
}

.placeholder-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-color);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.placeholder-link:hover {
  opacity: 0.7;
}


/* Course Page Layout (Doc Version) */
.course-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.doc-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 4rem;
  align-items: start;
}

/* Sidebar Navigation */
.doc-sidebar {
  position: sticky;
  top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  border-right: 1px solid var(--glass-border);
  padding-right: 1.5rem;
  min-height: calc(100vh - 4rem);
}

.toc-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toc-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
}

.toc-nav a:hover {
  background: var(--glass-hover);
  color: var(--text-highlight);
}

.toc-nav a.active {
  background: var(--glass-hover);
  color: var(--brand-color);
  font-weight: 600;
  border-left: 2px solid var(--brand-color);
}

/* Main Content Headings */
.doc-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.back-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.25s ease;
  width: max-content;
}

.back-nav:hover {
  color: var(--text-highlight);
}

.course-metadata {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.tag {
  background: var(--glass-hover);
  color: var(--text-highlight);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--glass-border);
  font-family: var(--font-mono);
}

.doc-header {
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 2rem;
  margin-bottom: 1rem;
}

.course-headline {
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.course-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 800px;
  line-height: 1.6;
}

/* Hardcore Markdown Body Typography */
.markdown-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.markdown-body h2 {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
}

.markdown-body h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.markdown-body p {
  margin-bottom: 1.25rem;
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.markdown-body li {
  margin-bottom: 0.5rem;
}

/* Code Blocks */
.markdown-body pre {
  background: var(--terminal-bar-bg);
  padding: 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  overflow-x: auto;
  margin-bottom: 1.5rem;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.05);
}

.markdown-body pre code {
  color: var(--text-highlight);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

.markdown-body a {
  color: var(--brand-color);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
}

/* Inline Code */
.markdown-body p code, .markdown-body li code {
  background: var(--glass-hover);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: var(--font-mono);
  color: var(--text-highlight);
}

/* Blockquotes */
.markdown-body blockquote {
  border-left: 4px solid var(--brand-color);
  padding-left: 1rem;
  color: var(--text-secondary);
  background: var(--glass-hover);
  padding: 1rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: 1.5rem;
}

/* Extracted Tables */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.markdown-body th, .markdown-body td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--glass-border);
  text-align: left;
}

.markdown-body th {
  background: var(--terminal-bar-bg);
  font-weight: 600;
}

@media (max-width: 900px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }
  .doc-sidebar {
    position: relative;
    top: 0;
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1.5rem;
  }
}