/* ============================================
   SIDEBAR & NAVIGATION STYLES
   ============================================ */

#sidebar-container {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--dark-surface);
  border-right: 1px solid var(--dark-border-solid);
  z-index: var(--z-sidebar);
  overflow-y: auto;
  transition: var(--transition-slow);
}

.sidebar {
  padding: 1.5rem 1rem;
}

/* Sidebar Header */
.sidebar-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--dark-border-solid);
  margin-bottom: 1rem;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* New Tutorial Button */
.btn-new-tutorial {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-new-tutorial:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Tutorial List */
.tutorial-list {
  list-style: none;
}

.tutorial-item {
  margin-bottom: 0.25rem;
}

.tutorial-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.tutorial-link:hover {
  background: var(--dark-card);
  color: var(--text-primary);
}

.tutorial-link.active {
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary);
}

.tutorial-link i {
  width: 20px;
  text-align: center;
  font-size: 0.875rem;
}

/* Category Filter */
.category-filter {
  margin-top: 1.5rem;
}

.category-list {
  list-style: none;
}

.category-item {
  margin-bottom: 0.25rem;
}

.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.category-link:hover {
  background: var(--dark-card);
  color: var(--text-primary);
}

.category-link.active {
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary);
}

.category-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.category-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--dark-card);
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
}

/* Progress in Sidebar */
.tutorial-progress-mini {
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.progress-bar-mini {
  flex: 1;
  height: 4px;
  background: var(--dark-card);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-mini-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.progress-text-mini {
  font-size: 0.625rem;
  color: var(--text-muted);
}

/* Step List in Tutorial Detail */
.step-list {
  list-style: none;
  margin-top: 0.5rem;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.step-item:hover {
  background: var(--dark-card);
  color: var(--text-secondary);
}

.step-item.completed {
  color: var(--accent);
}

.step-item.current {
  background: rgba(108, 99, 255, 0.1);
  color: var(--primary);
}

.step-check {
  width: 16px;
  text-align: center;
}

.step-check i {
  font-size: 0.625rem;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  min-width: 20px;
}

.step-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar Toggle (Mobile) */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  z-index: calc(var(--z-sidebar) + 10);
  transition: var(--transition);
}

.sidebar-toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

@media (max-width: 1024px) {
  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Sidebar Footer */
.sidebar-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--dark-border-solid);
}

.sidebar-footer-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* Collapsible Sections */
.sidebar-section {
  margin-bottom: 1rem;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.sidebar-section-header:hover {
  background: var(--dark-card);
}

.sidebar-section-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.sidebar-section-toggle {
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: var(--transition);
}

.sidebar-section-header.collapsed .sidebar-section-toggle {
  transform: rotate(-90deg);
}

.sidebar-section-content {
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.sidebar-section-header.collapsed + .sidebar-section-content {
  max-height: 0;
}

/* Header Styles */
#header-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--dark-surface);
  border-bottom: 1px solid var(--dark-border-solid);
  z-index: var(--z-header);
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
}

.logo-text span {
  color: var(--primary);
}

/* Search */
.header-search {
  position: relative;
  width: 320px;
}

.search-input {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.5rem;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: 100;
}

.search-result-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid var(--dark-border-solid);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--dark-surface);
}

.search-result-type {
  font-size: 0.625rem;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.search-result-title {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.search-result-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.header-btn:hover {
  background: var(--dark-card-hover);
  color: var(--text-primary);
  border-color: var(--primary);
}

/* Footer Styles */
#footer-container {
  background: var(--dark-surface);
  border-top: 1px solid var(--dark-border-solid);
  padding: 0 1.5rem;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--footer-height);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text-secondary);
}

/* Responsive Header */
@media (max-width: 768px) {
  .header-search {
    width: 200px;
  }
  
  .logo-text {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-search {
    display: none;
  }
}
/* ============================================
   SIDEBAR & NAVIGATION STYLES
   ============================================ */

#sidebar-container {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--dark-surface);
  border-right: 1px solid var(--dark-border-solid);
  z-index: var(--z-sidebar);
  overflow-y: auto;
  transition: var(--transition-slow);
}

.sidebar {
  padding: 1.5rem 1rem;
}

/* Sidebar Header */
.sidebar-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--dark-border-solid);
  margin-bottom: 1rem;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* New Tutorial Button */
.btn-new-tutorial {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-new-tutorial:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Tutorial List */
.tutorial-list {
  list-style: none;
}

.tutorial-item {
  margin-bottom: 0.25rem;
}

.tutorial-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.tutorial-link:hover {
  background: var(--dark-card);
  color: var(--text-primary);
}

.tutorial-link.active {
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary);
}

.tutorial-link i {
  width: 20px;
  text-align: center;
  font-size: 0.875rem;
}

/* Category Filter */
.category-filter {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--dark-border-solid);
}

.category-list {
  list-style: none;
}

.category-item {
  margin-bottom: 0.25rem;
}

.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.category-link:hover {
  background: var(--dark-card);
  color: var(--text-primary);
}

.category-link.active {
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary);
}

.category-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.category-count {
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  background: var(--dark-card);
  border-radius: 9999px;
  color: var(--text-muted);
}

/* Sidebar Footer */
.sidebar-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--dark-border-solid);
  text-align: center;
}

.sidebar-footer-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.sidebar-version {
  font-size: 0.6875rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* Mobile Toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 150;
  width: 40px;
  height: 40px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* Responsive Sidebar */
@media (max-width: 1024px) {
  #sidebar-container {
    transform: translateX(-100%);
  }
  
  #sidebar-container.open {
    transform: translateX(0);
  }
  
  .sidebar-toggle {
    display: flex;
  }
}

/* ============================================
   SIDEBAR LOGIN PROMPT
   ============================================ */

.sidebar-login-prompt {
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.1) 0%, rgba(255, 101, 132, 0.05) 100%);
  border: 1px solid rgba(108, 99, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.login-prompt-content {
  text-align: center;
}

.login-prompt-content > i {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.login-prompt-content > p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.login-prompt-content .btn {
  width: 100%;
}

/* ============================================
   COURSE LIST STYLES (NUEVO)
   ============================================ */

.sidebar-section {
  margin-bottom: 1.5rem;
}

.sidebar-section-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-section-title i {
  font-size: 0.75rem;
}

/* Course List - Nueva lista destacada de cursos */
.sidebar-courses {
  background: var(--dark-card);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.course-list {
  list-style: none;
}

.course-item {
  margin-bottom: 0.5rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.course-item:last-child {
  margin-bottom: 0;
}

.course-item:hover {
  background: var(--dark-card-hover);
}

.course-item.active {
  background: rgba(108, 99, 255, 0.15);
  box-shadow: inset 0 0 0 1px rgba(108, 99, 255, 0.3);
}

.course-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
}

.course-thumbnail {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.course-info {
  flex: 1;
  min-width: 0;
}

.course-title {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.25rem;
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.course-category {
  color: var(--text-secondary);
}

.course-progress {
  height: 3px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
}

.course-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.3s ease;
}

.course-empty {
  text-align: center;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Skeleton loading para cursos */
.course-skeleton-thumb {
  width: 48px;
  height: 48px;
  background: var(--dark-bg);
  border-radius: var(--radius-sm);
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.course-skeleton-text {
  flex: 1;
  height: 16px;
  background: var(--dark-bg);
  border-radius: 4px;
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Admin Section */
.sidebar-admin-section {
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.1) 0%, rgba(255, 101, 132, 0.1) 100%);
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid rgba(108, 99, 255, 0.2);
}

.admin-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.btn-admin-action {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-admin-action:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.btn-admin-action i {
  font-size: 0.875rem;
}

/* ============================================
   HEADER FIXED STYLES (ACTUALIZADO)
   ============================================ */

/* Header Container - Fijo en la parte superior */
#header-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--dark-surface);
  border-bottom: 1px solid var(--dark-border-solid);
  z-index: var(--z-header);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 1.5rem;
}

/* Header Spacer - Compensar el header fijo */
.header-spacer {
  height: var(--header-height);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
}

.logo-text span {
  color: var(--primary);
}

/* Search */
.header-search {
  position: relative;
  width: 320px;
}

.search-input {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.5rem;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: 100;
}

.search-result-item {
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.search-result-item:hover {
  background: var(--dark-card-hover);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.header-btn:hover {
  background: var(--dark-card-hover);
  color: var(--text-primary);
  border-color: var(--primary);
}

.header-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* Botón de admin */
.header-btn-admin.active {
  background: var(--warning);
  border-color: var(--warning);
  color: var(--text-inverse);
}

/* Labels en botones del header (visibles en desktop) */
.header-btn-label {
  display: none;
  font-size: 0.75rem;
  margin-left: 0.25rem;
}

/* Responsive Header */
@media (max-width: 768px) {
  .header-search {
    width: 200px;
  }
  
  .logo-text {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-search {
    display: none;
  }
}