/* ======================================== */
/* SIDEBAR.CSS - Clean & Fixed v3           */
/* ======================================== */

/* ----- Root Variables ----- */
:root {
  --sidebar-width: 0px;
}

/* ----- Sidebar Container ----- */
.course-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 0;
  z-index: 1000;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  background: #0a0a0f;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 4px 0 30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.course-sidebar.open {
  width: 360px;
}

/* ----- Sidebar Toggle Button (mobile) ----- */
.sidebar-toggle {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1001;
  background: #0a0a0f;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  font-size: var(--font-lg);
  color: #ffffff;
  transition: var(--transition);
  display: none;
}

.sidebar-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* ----- Sidebar Content ----- */
.sidebar-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0;
  overflow: hidden;
  background: #0a0a0f;
}

/* ----- Sidebar Header ----- */
.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
  background: #0a0a0f;
}

.sidebar-logo-text {
  font-weight: 800;
  font-size: var(--font-xl);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.sidebar-collapse-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.sidebar-collapse-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.sidebar-close {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
  display: none;
}

.sidebar-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

/* ----- Sidebar Footer (Sticky) ----- */
.sidebar-footer {
  flex-shrink: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #0a0a0f;
  padding: 0.5rem 0;
}

/* ----- Progress Section (inside footer) ----- */
.sidebar-footer .sidebar-progress {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border-bottom: none;
}

.sidebar-footer .sidebar-progress .progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.sidebar-footer .sidebar-progress .progress-title {
  font-weight: 600;
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.7);
}

.sidebar-footer .sidebar-progress .progress-percentage {
  font-weight: 700;
  font-size: var(--font-base);
  color: var(--primary-light);
}

.sidebar-footer .sidebar-progress .progress-bar-container {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.sidebar-footer .sidebar-progress .progress-bar-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: 3px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}

.sidebar-footer .sidebar-progress .progress-stats {
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* ----- Reset Button (inside footer) ----- 
.sidebar-footer .sidebar-reset-btn {
  margin: 0.5rem 1.5rem 0.75rem 1.5rem;
  padding: 0.6rem 1rem;
  background: rgba(239, 68, 68, 0.08);
  color: #EF4444;
  border: 1px solid rgba(239, 68, 68, 0.15);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-sm);
  font-weight: 500;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: calc(100% - 3rem);
}*/

.sidebar-footer .sidebar-reset-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
}

.sidebar-footer .sidebar-reset-btn i {
  font-size: var(--font-sm);
}

/* ----- Navigation Tree ----- */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0 0.5rem 0;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

.sidebar-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ----- Module Header ----- */
.sidebar-module {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.sidebar-module-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 700;
  font-size: var(--font-base);
  color: rgba(255, 255, 255, 0.85);
  user-select: none;
}

.sidebar-module-header:hover {
  background: rgba(124, 58, 237, 0.06);
}

.module-toggle {
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.3);
  transition: transform 0.25s ease;
  width: 16px;
  text-align: center;
}

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

.module-status {
  font-size: var(--font-sm);
  display: flex;
  align-items: center;
  width: 16px;
}

.module-title {
  flex: 1;
  font-size: var(--font-base);
}

.module-progress {
  font-size: var(--font-xs);
  color: rgba(255, 255, 255, 0.3);
  font-weight: 400;
}

/* ----- Topic List ----- */
.sidebar-topic-list {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 2000px;
}

.sidebar-module.collapsed .sidebar-topic-list {
  max-height: 0 !important;
}


/* ----- Topic Item ----- */
.sidebar-topic {
  border-left: 2px solid transparent;
  transition: var(--transition);
  display: flex;
  align-items: center;
  padding-right: 0.5rem;
}

.sidebar-topic a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.5rem 0.5rem 3.25rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.55);
  font-size: var(--font-sm);
  transition: var(--transition);
  flex: 1;
}

.sidebar-topic a:hover {
  color: rgba(255, 255, 255, 0.85);
  background: rgba(124, 58, 237, 0.04);
}

.sidebar-topic.active {
  border-left-color: var(--primary);
  background: rgba(124, 58, 237, 0.08);
}

.sidebar-topic.active a {
  color: var(--primary-light);
  font-weight: 600;
}

.sidebar-topic.project a {
  color: rgba(255, 255, 255, 0.45);
}

.sidebar-topic.project.active a {
  color: var(--primary-light);
}

.topic-status {
  font-size: var(--font-xs);
  display: flex;
  align-items: center;
  width: 14px;
  flex-shrink: 0;
}

.topic-title {
  flex: 1;
  font-size: var(--font-sm);
  line-height: 1.4;
}

/* ----- Topic Links (documentation icons) ----- */
.topic-links {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
  opacity: 0.4;
  transition: var(--transition);
}

.sidebar-topic:hover .topic-links {
  opacity: 0.8;
}

.topic-links a {
  padding: 0.2rem 0.4rem;
  color: rgba(255, 255, 255, 0.4);
  font-size: var(--font-xs);
  text-decoration: none;
  transition: var(--transition);
  border-radius: 3px;
}

.topic-links a:hover {
  color: var(--primary-light);
  background: rgba(124, 58, 237, 0.1);
}

/* ----- Status Icons ----- */
.status-pending {
  color: rgba(255, 255, 255, 0.15);
}

.status-current {
  color: #3B82F6;
  animation: pulse 1.5s ease-in-out infinite;
}

.status-completed {
  color: #10B981;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ----- Projects Header Label ----- */
.sidebar-project-header {
  list-style: none;
  padding: 0.75rem 1.5rem 0.4rem 3.25rem;
  font-size: var(--font-xs);
  font-weight: 700;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.25);
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  margin: 0.25rem 0;
}



/* ======================================== */
/* RESPONSIVE                               */
/* ======================================== */

/* ----- Mobile (<= 1024px) ----- */
@media (max-width: 1024px) {
  .sidebar-toggle {
    display: block;
  }

  .sidebar-close {
    display: block;
  }

  .course-sidebar.open {
    width: 100%;
    max-width: 380px;
  }

  .course-sidebar {
    width: 0;
    box-shadow: none;
  }

  .sidebar-topic a {
    padding: 0.5rem 0.5rem 0.5rem 2.75rem;
  }

  .sidebar-project-header {
    padding: 0.5rem 1rem 0.25rem 2.25rem;
  }

  body.has-sidebar main {
    margin-left: 0;
    width: 100%;
  }

  body.has-sidebar .header-nav {
    left: 0;
    width: 100%;
  }
}

/* ----- Mobile Small (<= 768px) ----- */
@media (max-width: 768px) {
  .course-sidebar.open {
    max-width: 100%;
  }

  .sidebar-module-header {
    padding: 0.625rem 1rem;
  }

  .sidebar-topic a {
    padding: 0.5rem 0.5rem 0.5rem 2.25rem;
    font-size: var(--font-sm);
  }

  .sidebar-project-header {
    padding: 0.5rem 1rem 0.25rem 2rem;
  }

  .sidebar-footer .sidebar-progress {
    padding: 0.5rem 1rem;
  }

  .sidebar-footer .sidebar-reset-btn {
    margin: 0.25rem 1rem 0.5rem 1rem;
    width: calc(100% - 2rem);
  }

  .sidebar-header {
    padding: 0.75rem 1rem;
  }

  .sidebar-logo-text {
    font-size: var(--font-lg);
  }

  .course-sidebar.open {
    width: 100%;
    max-width: 100%;
  }
}

/* ----- Desktop (>= 1025px) ----- */
@media (min-width: 1025px) {
  .course-sidebar {
    width: 360px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
  }

  .course-sidebar.collapsed {
    width: 60px;
  }

  .course-sidebar.collapsed .sidebar-logo-text,
  .course-sidebar.collapsed .sidebar-footer,
  .course-sidebar.collapsed .sidebar-topic-list,
  .course-sidebar.collapsed .module-title,
  .course-sidebar.collapsed .module-progress,
  .course-sidebar.collapsed .topic-title,
  .course-sidebar.collapsed .topic-links,
  .course-sidebar.collapsed .sidebar-header-actions .sidebar-close,
  .course-sidebar.collapsed .sidebar-project-header {
    display: none;
  }

  .course-sidebar.collapsed .sidebar-module-header {
    padding: 0.75rem 0.5rem;
    justify-content: center;
  }

  .course-sidebar.collapsed .sidebar-module-header .module-toggle {
    display: none;
  }

  .course-sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 1.25rem 0.5rem;
  }

  .course-sidebar.collapsed .sidebar-collapse-btn i {
    transform: rotate(180deg);
  }

  /* Content shifts with sidebar */
  body.has-sidebar {
    --sidebar-width: 360px;
  }

  body.has-sidebar .course-sidebar.collapsed {
    --sidebar-width: 60px;
  }

  body.has-sidebar main {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    width: calc(100% - var(--sidebar-width));
    max-width: 100%;
  }

  body.has-sidebar .header-nav {
    left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body.has-sidebar .sidebar-close {
    display: none;
  }

}



/* ===== SIDEBAR FOOTER BUTTONS ===== */
.sidebar-footer-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0 1.5rem 0.75rem 1.5rem;
}

.sidebar-toggle-all-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
  min-height: 38px;
}

.sidebar-toggle-all-btn:hover {
  background: rgba(124, 58, 237, 0.15);
  color: #ffffff;
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-1px);
}

.sidebar-toggle-all-btn i {
  font-size: 0.8rem;
}

/* Reset button - same size as toggle */
.sidebar-reset-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(239, 68, 68, 0.05);
  color: #EF4444;
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
  min-height: 38px;
}

.sidebar-reset-btn:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.4);
  transform: translateY(-1px);
}

.sidebar-reset-btn i {
  font-size: 0.8rem;
}

/* ----- Topic List - ensure transition works ----- */
.sidebar-topic-list {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 2000px;
  display: block !important;
}

.sidebar-module.collapsed .sidebar-topic-list {
  max-height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}