/**
 * Python Course Trainer — две панели: Pyodide + навигация (премиум).
 */

.py-course-root {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  position: relative;
  z-index: 1;
}

.py-course-header {
  flex-shrink: 0;
}

.py-course-header__course {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  padding: 0 0.75rem;
  text-align: center;
}

.py-course-header__course-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(52, 211, 153, 0.85);
}

.py-course-header__lesson {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: min(42vw, 28rem);
}

[data-theme="light"] .py-course-header__lesson {
  color: rgba(15, 23, 42, 0.88);
}

/* Сетка: редактор | resizer | навигатор; ИИ — overlay */
.py-course-layout {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) 10px minmax(18rem, 0.65fr);
  grid-template-rows: 1fr;
  gap: 0;
  padding: 0.5rem 0.65rem 0.65rem;
  box-sizing: border-box;
}

.py-course-layout__editor {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(52, 211, 153, 0.18);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.py-course-sandbox-wrap {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.py-course-sandbox-wrap .python-sandbox-win-container,
.py-course-sandbox-wrap #python-sandbox-win-container {
  flex: 1 1 auto;
  min-height: 0;
  height: 100%;
}

.py-course-layout__resizer {
  cursor: col-resize;
  touch-action: none;
  position: relative;
  z-index: 3;
}

.py-course-layout__resizer::before {
  content: "";
  position: absolute;
  top: 8%;
  bottom: 8%;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(52, 211, 153, 0.35) 50%,
    transparent
  );
}

.py-course-layout__nav {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* Навигационная панель */
.py-course-nav {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  border: 1px solid rgba(52, 211, 153, 0.22);
  background: linear-gradient(
    165deg,
    rgba(15, 23, 42, 0.94) 0%,
    rgba(10, 18, 32, 0.98) 100%
  );
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}

[data-theme="light"] .py-course-nav {
  background: linear-gradient(
    165deg,
    rgba(255, 255, 255, 0.96) 0%,
    rgba(248, 250, 252, 0.98) 100%
  );
  border-color: rgba(5, 184, 125, 0.2);
}

.py-course-nav__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid rgba(52, 211, 153, 0.15);
}

.py-course-nav__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.95);
}

[data-theme="light"] .py-course-nav__title {
  color: rgba(15, 23, 42, 0.92);
}

.py-course-nav__collapse {
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: 8px;
  background: rgba(52, 211, 153, 0.08);
  color: rgba(52, 211, 153, 0.95);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

.py-course-nav__body {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.py-course-nav__tree {
  flex: 0 0 auto;
  max-height: 38%;
  overflow-y: auto;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  scrollbar-width: thin;
}

.py-course-nav__module {
  margin-bottom: 0.25rem;
}

.py-course-nav__module-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.4rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  list-style: none;
}

.py-course-nav__module-title::-webkit-details-marker {
  display: none;
}

[data-theme="light"] .py-course-nav__module-title {
  color: rgba(15, 23, 42, 0.78);
}

.py-course-nav__module-num {
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
  font-size: 0.72rem;
}

.py-course-nav__lessons {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem 1.85rem;
}

.py-course-nav__lesson {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  padding: 0.3rem 0.35rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.68);
  transition: background 0.15s, color 0.15s;
}

.py-course-nav__lesson:hover {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
}

.py-course-nav__lesson--active {
  background: rgba(52, 211, 153, 0.14);
  color: #6ee7b7;
}

.py-course-nav__lesson--done .py-course-nav__lesson-dot {
  background: #34d399;
  box-shadow: 0 0 0 2px rgba(52, 211, 153, 0.35);
}

.py-course-nav__lesson-dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 0.35rem;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.5);
}

[data-theme="light"] .py-course-nav__lesson {
  color: rgba(15, 23, 42, 0.62);
}

[data-theme="light"] .py-course-nav__lesson--active {
  color: #059669;
}

.py-course-nav__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.py-course-nav__tab {
  flex: 1 1 auto;
  min-width: 4.2rem;
  padding: 0.35rem 0.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.py-course-nav__tab:hover {
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.05);
}

.py-course-nav__tab--active {
  background: rgba(52, 211, 153, 0.18);
  border-color: rgba(52, 211, 153, 0.35);
  color: #6ee7b7;
}

[data-theme="light"] .py-course-nav__tab {
  color: rgba(15, 23, 42, 0.5);
}

[data-theme="light"] .py-course-nav__tab--active {
  color: #047857;
  background: rgba(5, 184, 125, 0.12);
}

.py-course-nav__panels {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.py-course-nav__panel {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 0.75rem 0.85rem 1rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.82);
  scrollbar-width: thin;
}

.py-course-nav__panel[hidden] {
  display: none !important;
}

.py-course-nav__panel--active {
  display: block;
}

[data-theme="light"] .py-course-nav__panel {
  color: rgba(15, 23, 42, 0.82);
}

.py-course-nav__placeholder {
  opacity: 0.65;
  font-style: italic;
}

.py-course-exercise-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.py-course-exercise-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  border: 1px solid rgba(52, 211, 153, 0.22);
  background: rgba(52, 211, 153, 0.06);
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.py-course-exercise-btn:hover {
  border-color: rgba(52, 211, 153, 0.45);
  background: rgba(52, 211, 153, 0.12);
}

.py-course-exercise-btn__pts {
  font-size: 0.7rem;
  opacity: 0.7;
}

.py-course-exercise-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.py-course-exercise-item--done .py-course-exercise-btn {
  border-color: rgba(52, 211, 153, 0.55);
  background: rgba(52, 211, 153, 0.14);
}

.py-course-exercise-check {
  align-self: flex-start;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(52, 211, 153, 0.4);
  background: rgba(52, 211, 153, 0.12);
  color: #6ee7b7;
  font-size: 0.72rem;
  font-weight: 650;
  cursor: pointer;
}

.py-course-exercise-check:hover {
  background: rgba(52, 211, 153, 0.22);
}

.py-course-exercise-result {
  font-size: 0.78rem;
  padding: 0.4rem 0.55rem;
  border-radius: 8px;
  line-height: 1.4;
}

.py-course-exercise-result--ok {
  background: rgba(52, 211, 153, 0.12);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.25);
}

.py-course-exercise-result--fail {
  background: rgba(248, 113, 113, 0.1);
  color: #fca5a5;
  border: 1px solid rgba(248, 113, 113, 0.25);
}

.py-course-practice-hint {
  margin: 0.65rem 0 0;
  font-size: 0.75rem;
  opacity: 0.65;
}

.py-course-nav__panel--ai {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.py-course-nav__ai-lede {
  margin: 0;
  opacity: 0.85;
}

.py-course-nav__ai-open {
  align-self: flex-start;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #34d399, #059669);
  color: #042f1a;
  font-weight: 650;
  cursor: pointer;
}

.py-course-nav__ai-tips {
  margin: 0;
  padding-left: 1.1rem;
  opacity: 0.75;
  font-size: 0.82rem;
}

/* ИИ: колонка скрыта, FAB виден */
.py-course-layout__ai {
  position: fixed;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  overflow: visible;
  pointer-events: none;
  z-index: 10060;
}

body.neuroege-python-playground-chat-closed .py-course-layout__ai #neuroege-ai-chat {
  visibility: visible;
  pointer-events: auto;
  position: fixed !important;
  right: 1rem !important;
  bottom: 1.25rem !important;
  z-index: 10070 !important;
}

/* Свернутая навигация */
body.py-course-nav-collapsed .py-course-layout {
  grid-template-columns: minmax(0, 1fr) 0 2.75rem;
}

body.py-course-nav-collapsed .py-course-layout__resizer {
  display: none;
}

body.py-course-nav-collapsed .py-course-nav__body {
  display: none;
}

body.py-course-nav-collapsed .py-course-nav__collapse {
  transform: rotate(180deg);
}

@media (max-width: 900px) {
  .py-course-layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(50vh, 1fr) auto;
  }

  .py-course-layout__resizer {
    display: none;
  }

  .py-course-layout__nav {
    max-height: 42vh;
  }
}