/* ============================================================
   LESSON ULTRA, gamified lesson chrome
   Loaded after lesson.css. Scoped to body.lesson-body.
   Touches chrome only, never the CodeMirror editor internals.
   ============================================================ */
.lesson-body {
  --elec:   #00e0ff;
  --elec-2: #19f5c8;
  --mono:   'JetBrains Mono','SFMono-Regular',Consolas,Menlo,monospace;
}

/* ── header ── */
.lesson-body .lesson-header {
  background: rgba(10,22,40,0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,224,255,0.16);
}
.lesson-body .lesson-back { transition: all 0.2s ease; }
.lesson-body .lesson-back:hover { color: var(--elec); transform: translateX(-2px); }
.lesson-body .lesson-counter { font-family: var(--mono); letter-spacing: 0.04em; }

/* ── progress dots, the "level track" ── */
.lesson-body .lesson-dots { gap: 6px; }
.lesson-body .lesson-dots a,
.lesson-body .lesson-dots span,
.lesson-body .lesson-dot {
  transition: all 0.25s ease;
}
.lesson-body .lesson-dots .done,
.lesson-body .lesson-dots .completed,
.lesson-body .lesson-dot.done {
  background: linear-gradient(120deg, var(--elec), var(--elec-2)) !important;
  box-shadow: 0 0 10px rgba(0,224,255,0.55);
}
.lesson-body .lesson-dots .active,
.lesson-body .lesson-dots .current,
.lesson-body .lesson-dot.active {
  background: var(--elec) !important;
  box-shadow: 0 0 0 3px rgba(0,224,255,0.25), 0 0 14px rgba(0,224,255,0.7);
  transform: scale(1.25);
}

/* ── completed badge ── */
.lesson-body .lesson-completed-badge {
  background: linear-gradient(120deg, #10b981, var(--elec-2)) !important;
  color: #04121d !important;
  font-weight: 800;
  box-shadow: 0 0 16px rgba(25,245,200,0.4);
}

/* ── nav buttons ── */
.lesson-body .lesson-nav-btn { transition: all 0.2s ease; }
.lesson-body .lesson-nav-btn:hover:not(:disabled) {
  border-color: var(--elec);
  color: var(--elec);
  box-shadow: 0 0 14px rgba(0,224,255,0.28);
}

/* ── sidebar lesson list ── */
.lesson-body .lesson-nav-num {
  font-family: var(--mono);
  transition: all 0.25s ease;
}
.lesson-body .lesson-sidebar a:hover .lesson-nav-num,
.lesson-body .lesson-sidebar .active .lesson-nav-num {
  background: linear-gradient(135deg, var(--primary, #00bcd4), var(--elec)) !important;
  color: #04121d !important;
  box-shadow: 0 0 12px rgba(0,224,255,0.45);
}
.lesson-body .lesson-sidebar a { transition: background 0.2s ease, transform 0.2s ease; }
.lesson-body .lesson-sidebar a:hover { transform: translateX(3px); }

/* ── task panel, quest card ── */
.lesson-body .task-panel {
  border: 1px solid rgba(0,224,255,0.22);
  box-shadow: 0 0 0 1px rgba(0,224,255,0.05), 0 8px 26px rgba(0,0,0,0.12);
}
.lesson-body .task-panel-label {
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--elec);
}
.lesson-body .task-dot-nav span,
.lesson-body .task-dot-nav button { transition: all 0.2s ease; }
.lesson-body .task-dot-nav .active,
.lesson-body .task-dot-nav .current {
  background: var(--elec) !important;
  box-shadow: 0 0 10px rgba(0,224,255,0.6);
}
.lesson-body .task-dot-nav .done {
  background: var(--elec-2) !important;
  box-shadow: 0 0 8px rgba(25,245,200,0.5);
}

/* ── code panel tabs ── */
.lesson-body .lesson-tab { transition: all 0.2s ease; }
.lesson-body .lesson-tab:hover { color: var(--elec); }
.lesson-body .lesson-tab.active {
  color: var(--elec) !important;
  border-bottom-color: var(--elec) !important;
  text-shadow: 0 0 12px rgba(0,224,255,0.4);
}
.lesson-body .lesson-tab-action { transition: all 0.2s ease; }
.lesson-body .lesson-tab-action:hover {
  color: var(--elec);
  box-shadow: 0 0 12px rgba(0,224,255,0.25);
}

/* ── hint section ── */
.lesson-body .lesson-hint-section {
  border-left: 3px solid var(--elec);
  background: rgba(0,224,255,0.05);
}

/* ── run/check buttons get the electric treatment ── */
.lesson-body .btn-primary {
  background: linear-gradient(120deg, var(--primary, #00bcd4), #05a2bd);
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(0,188,212,0.32);
}
.lesson-body .btn-primary:hover {
  box-shadow: 0 8px 24px rgba(0,224,255,0.45);
  transform: translateY(-1px);
}

/* ── readability guard ──────────────────────────────────────
   lesson.css sets `body.lesson-body { background:#0d1117; color:var(--text) }`,
   and --text is the light-theme ink (#1a1a2e). So every element on the dark
   shell that does not declare its own colour renders near-black on near-black
   (#1a1a2e on #0d1117 / #1e1e2e ≈ 1.2:1, effectively invisible). Symptoms:
   the "Course Complete" overlay hero icon and the check-toast close button.
   Fix: light ink on the dark shell, dark ink re-asserted on the light panels. */
body.lesson-body { color: rgba(255,255,255,0.82); }
.lesson-body .lesson-theory-panel { color: var(--text); }
.lesson-body .lesson-preview-wrap { color: var(--text); }
.lesson-body .lesson-sidebar { color: rgba(255,255,255,0.7); }
/* buttons do not inherit colour from their parent by default (UA ButtonText) */
.lesson-body .check-result button { color: inherit; }

@media (prefers-reduced-motion: reduce) {
  .lesson-body * { transition: none !important; }
}