/* =============================================
   IXP Course - course.css  (module pages)
   Material theme-inspired format
   ============================================= */

/* ---- Two-column layout ---- */
.course-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: 1260px;
  margin: 0 auto;
  transition: grid-template-columns 0.3s ease;
}

.course-layout.sidebar-collapsed {
  grid-template-columns: 0px 1fr;
}

/* ---- Sidebar ---- */
.course-sidebar {
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--gray-50);
  border-right: 1px solid var(--gray-200);
  padding: 1.25rem 0;
  transition: padding 0.3s ease, opacity 0.3s ease;
}

.course-layout.sidebar-collapsed .course-sidebar {
  padding: 0;
  opacity: 0;
  pointer-events: none;
  border-right: none;
}

/* ---- Sidebar toggle button ---- */
.sidebar-toggle-btn {
  position: fixed;
  top: 68px;
  left: 248px;
  z-index: 200;
  width: 24px;
  height: 24px;
  background: var(--uipath-orange, #FA4616);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  transition: left 0.3s ease, transform 0.3s ease;
}

.sidebar-toggle-btn:hover {
  background: #d93d10;
}

.sidebar-collapsed .sidebar-toggle-btn,
.course-layout.sidebar-collapsed ~ * .sidebar-toggle-btn {
  left: 8px;
}

.sidebar-toggle-btn svg {
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.sidebar-nav__title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--gray-400);
  padding: 0.5rem 1.25rem 0.25rem;
  margin-bottom: 0.25rem;
}

.sidebar-nav__list { list-style: none; padding: 0; margin: 0; }
.sidebar-nav__list li a {
  display: block;
  padding: 0.5rem 1.25rem;
  font-size: 0.82rem;
  color: var(--gray-700);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background .12s, color .12s, border-color .12s;
  line-height: 1.4;
}
.sidebar-nav__list li a:hover {
  background: var(--gray-100);
  color: var(--uipath-orange);
  border-left-color: var(--uipath-orange);
}
.sidebar-nav__list li a.active {
  background: var(--uipath-orange-light);
  color: var(--uipath-orange);
  border-left-color: var(--uipath-orange);
  font-weight: 600;
}
.sidebar-nav__list li a .check { color: var(--success); font-size: 0.7rem; margin-left: 0.4rem; }
.sidebar-nav__list li a.sidebar-nav__sub {
  padding-left: 2rem;
  font-size: 0.78rem;
  color: var(--gray-600);
  border-left-color: transparent;
}
.sidebar-nav__list li a.sidebar-nav__sub:hover { color: var(--uipath-orange); border-left-color: var(--uipath-orange); }
.sidebar-nav__list li a.sidebar-nav__subsub {
  padding-left: 3rem;
  font-size: 0.75rem;
  color: var(--gray-500);
  border-left-color: transparent;
}
.sidebar-nav__list li a.sidebar-nav__subsub:hover { color: var(--uipath-orange); border-left-color: var(--uipath-orange); }
.sidebar-nav__list li a.sidebar-nav__subsubsub {
  padding-left: 4rem;
  font-size: 0.72rem;
  color: var(--gray-400);
  border-left-color: transparent;
}
.sidebar-nav__list li a.sidebar-nav__subsubsub:hover { color: var(--uipath-orange); border-left-color: var(--uipath-orange); }

/* Collapse/expand toggle arrow */
.sidebar-toggle {
  font-size: 0.6rem;
  color: var(--gray-400);
  margin-left: 0.3rem;
  cursor: pointer;
  vertical-align: middle;
  user-select: none;
}
.sidebar-toggle:hover { color: var(--uipath-orange); }

.sidebar-progress {
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  border-top: 1px solid var(--gray-200);
  font-size: 0.8rem;
}
.sidebar-progress .label { color: var(--gray-600); margin-bottom: 0.4rem; }

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--gray-600); text-decoration: none; }
.breadcrumb a:hover { color: var(--uipath-orange); text-decoration: underline; }
.breadcrumb span[aria-hidden] { color: var(--gray-400); }

/* ---- Page Header (replaces module-header gradient) ---- */
.page-header {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 2rem;
}
.page-header h1 {
  color: var(--uipath-dark);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.page-header__meta {
  display: flex;
  gap: 1.25rem;
  font-size: 0.82rem;
  color: var(--gray-400);
  flex-wrap: wrap;
}
.page-header__meta span { display: flex; align-items: center; gap: 0.3rem; }

/* ---- Module Content Area ---- */
.course-content {
  min-width: 0;
  padding: 2rem 2.5rem;
  max-width: 860px;
}

/* ---- Learning Objectives ---- */
.objectives-box {
  background: var(--uipath-orange-light);
  border-left: 4px solid var(--uipath-orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.4rem;
  margin-bottom: 2rem;
}
.objectives-box h3 { color: var(--uipath-orange-dark); margin-bottom: 0.6rem; font-size: 0.95rem; font-weight: 700; }
.objectives-box ul { margin: 0; }
.objectives-box li { font-size: 0.875rem; margin-bottom: 0.35rem; }

/* ---- Content Sections ---- */
.lesson { margin-bottom: 2.75rem; }
.lesson-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--uipath-dark);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 1.25rem;
}

/* ---- Info Cards ---- */
.info-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
  margin-bottom: 1.25rem;
}
.info-card h4 { color: var(--uipath-dark); margin-bottom: 0.5rem; font-size: 0.95rem; }
.info-card p:last-child, .info-card ul:last-child { margin-bottom: 0; }

/* ---- Admonitions (Material theme style) ---- */
.admonition {
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.25rem 0;
  box-shadow: 0 2px 6px rgba(0,0,0,.07);
  font-size: 0.9rem;
}
.admonition-title {
  padding: 0.55rem 1rem;
  font-weight: 700;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.admonition-body {
  padding: 0.85rem 1rem;
  background: var(--white);
  border: 1px solid;
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.admonition-body p:last-child { margin-bottom: 0; }

.admonition--tip .admonition-title   { background: #00BFA5; color: #fff; }
.admonition--tip .admonition-body    { border-color: #00BFA5; }

.admonition--note .admonition-title  { background: #448AFF; color: #fff; }
.admonition--note .admonition-body   { border-color: #448AFF; }

.admonition--important .admonition-title { background: var(--uipath-orange); color: #fff; }
.admonition--important .admonition-body  { border-color: var(--uipath-orange); }

.admonition--success .admonition-title { background: var(--success); color: #fff; }
.admonition--success .admonition-body  { border-color: var(--success); }

/* ---- Comparison Tables ---- */
.comparison-table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: 0.875rem; }
.comparison-table th { background: var(--uipath-dark); color: var(--white); padding: 0.65rem 1rem; text-align: left; font-size: 0.82rem; font-weight: 600; letter-spacing: .03em; }
.comparison-table td { padding: 0.6rem 1rem; border-bottom: 1px solid var(--gray-200); vertical-align: top; }
.comparison-table tr:nth-child(even) td { background: var(--gray-50); }
.comparison-table tr:hover td { background: var(--uipath-orange-light); }

/* ---- Process Steps ---- */
.steps-list { counter-reset: step; list-style: none; padding: 0; margin: 1.25rem 0; }
.steps-list li { display: flex; gap: 1rem; margin-bottom: 1rem; align-items: flex-start; }
.steps-list li::before { counter-increment: step; content: counter(step); background: var(--uipath-orange); color: var(--white); border-radius: 50%; width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.78rem; flex-shrink: 0; margin-top: 2px; }

/* ---- Concept Pill Tags ---- */
.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0; }
.tag { background: var(--gray-100); color: var(--gray-700); padding: 0.2rem 0.7rem; border-radius: 999px; font-size: 0.78rem; font-weight: 500; }
.tag--orange { background: var(--uipath-orange-light); color: var(--uipath-orange-dark); }

/* ---- Quiz ---- */
.quiz-section { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 1.5rem; margin: 2rem 0; }
.quiz-section h3 { color: var(--uipath-dark); margin-bottom: 1.25rem; display: flex; align-items: center; gap: 0.5rem; font-size: 1rem; }
.quiz-question { margin-bottom: 1.5rem; }
.quiz-question p { font-weight: 600; margin-bottom: 0.75rem; font-size: 0.9rem; }
.quiz-options { list-style: none; padding: 0; }
.quiz-options li { margin-bottom: 0.5rem; }
.quiz-options label { display: flex; align-items: flex-start; gap: 0.6rem; cursor: pointer; padding: 0.55rem 0.9rem; border: 1px solid var(--gray-200); border-radius: var(--radius); font-size: 0.875rem; transition: border-color .15s, background .15s; }
.quiz-options label:hover { border-color: var(--uipath-orange); background: var(--uipath-orange-light); }
.quiz-options input[type=radio], .quiz-options input[type=checkbox] { margin-top: 2px; accent-color: var(--uipath-orange); }
.quiz-options label.correct { border-color: var(--success); background: #F0FDF4; }
.quiz-options label.incorrect { border-color: #EF4444; background: #FEF2F2; }
.quiz-feedback { margin-top: 0.75rem; font-size: 0.875rem; font-weight: 600; padding: 0.5rem 0.75rem; border-radius: var(--radius); display: none; }
.quiz-feedback.show { display: block; }
.quiz-feedback.correct-fb { color: #065F46; background: #D1FAE5; }
.quiz-feedback.incorrect-fb { color: #991B1B; background: #FEE2E2; }
.quiz-submit { margin-top: 1rem; }
.quiz-result { text-align: center; padding: 1.25rem; border-radius: var(--radius); margin-top: 1rem; display: none; }
.quiz-result.show { display: block; }
.quiz-result.pass { background: #D1FAE5; color: #065F46; }
.quiz-result.fail { background: #FEE2E2; color: #991B1B; }

/* ---- Module Navigation ---- */
.module-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--gray-200); gap: 1rem; flex-wrap: wrap; }
.module-nav__complete { display: flex; align-items: center; gap: 0.75rem; }
.mark-complete-btn { background: var(--success); color: var(--white); border: none; padding: 0.55rem 1.1rem; border-radius: var(--radius); font-size: 0.875rem; font-weight: 700; cursor: pointer; transition: background .2s; }
.mark-complete-btn:hover { background: #059669; }
.mark-complete-btn.completed { background: var(--gray-400); cursor: default; }
.mark-complete-btn.completed::before { content: '✓ '; }

/* ---- Part Headers ---- */
.part-header {
  border-top: 2px solid var(--uipath-orange);
  margin: 2.5rem 0 1.75rem;
  padding-top: 1.25rem;
}
.part-header__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--uipath-dark);
  margin: 0;
}
.part-header__label {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--uipath-orange);
  margin-right: 0.25rem;
}

/* ---- Sub-Part Headers (within a Part) ---- */
.subpart-header {
  border-left: 4px solid var(--uipath-orange);
  background: var(--gray-50);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 2rem 0 1.25rem;
  padding: 0.65rem 1.1rem;
}
.subpart-header__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--uipath-dark);
  margin: 0;
}
.subpart-header__label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--uipath-orange);
  margin-right: 0.25rem;
}

/* ---- Tabs ---- */
.tabs { margin: 1.25rem 0; }
.tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  border-bottom: 2px solid var(--gray-200);
}
.tabs__btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  padding: 0.65rem 1rem;
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--gray-600);
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.tabs__btn:hover { color: var(--uipath-orange-dark); }
.tabs__btn.active { color: var(--uipath-orange); border-bottom-color: var(--uipath-orange); }
.tabs__panel { padding-top: 1.25rem; }
.tabs__panel[hidden] { display: none; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--gray-200); padding: 0.75rem 0; }
  .course-content { padding: 1.5rem 1.25rem; }
}
@media (max-width: 640px) {
  .page-header h1 { font-size: 1.35rem; }
  .module-nav { flex-direction: column; align-items: stretch; }
  .course-content { padding: 1.25rem 1rem; }
}