/* ========================================
   Stage Lock — Поэтапная разблокировка контента
   Design tokens consistent styling
   ======================================== */

/* --- Locked navigation item --- */
.md-nav__item.stage-locked {
  position: relative;
  pointer-events: none;
  user-select: none;
}

/* Desaturate and dim */
.md-nav__item.stage-locked > .md-nav__link {
  filter: grayscale(0.6) brightness(0.7);
  opacity: 0.55;
  cursor: not-allowed;
}

/* Lock overlay on nav item */
.md-nav__item.stage-locked > .md-nav__link::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 4px;
  pointer-events: none;
  z-index: 1;
}

/* Lock badge with date */
.stage-lock-badge {
  display: flex;
  align-items: center;
  gap: 0.35em;
  margin-top: 0.35em;
  padding: 0.3em 0.6em;
  border-radius: 6px;
  font-size: 0.75em;
  font-weight: 600;
  background: rgba(239, 83, 80, 0.08);
  color: #ef5350;
  border: 1px solid rgba(239, 83, 80, 0.15);
  white-space: nowrap;
  animation: stage-lock-pulse 3s ease-in-out infinite;
}

.stage-lock-badge .lock-icon {
  font-size: 1.1em;
}

.stage-lock-badge .unlock-date {
  font-variant-numeric: tabular-nums;
}

/* Pulse animation */
@keyframes stage-lock-pulse {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}

/* --- Locked page overlay --- */
.stage-page-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: overlay-fade-in 0.4s ease;
}

.stage-page-overlay__content {
  text-align: center;
  padding: 2.5em 3em;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid rgba(239, 83, 80, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  max-width: 420px;
  animation: overlay-slide-up 0.4s ease;
}

.stage-page-overlay__icon {
  font-size: 3em;
  margin-bottom: 0.5em;
}

.stage-page-overlay__title {
  font-size: 1.3em;
  font-weight: 700;
  margin-bottom: 0.4em;
  color: var(--text-heading);
}

.stage-page-overlay__text {
  font-size: 0.95em;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 1em;
}

.stage-page-overlay__date {
  display: inline-block;
  padding: 0.4em 1em;
  border-radius: 8px;
  font-size: 0.9em;
  font-weight: 600;
  background: rgba(239, 83, 80, 0.08);
  color: #ef5350;
  border: 1px solid rgba(239, 83, 80, 0.15);
}

.stage-page-overlay__hint {
  display: block;
  margin-top: 1em;
  font-size: 0.8em;
  opacity: 0.5;
  color: var(--text-secondary);
}

/* Back to home button — blue */
.stage-page-overlay__btn {
  display: inline-block;
  margin-top: 1.2em;
  padding: 0.5em 1.5em;
  border-radius: 8px;
  font-size: 0.9em;
  font-weight: 600;
  color: #fff;
  background: var(--accent-blue);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.stage-page-overlay__btn:hover {
  background: var(--accent-blue-hover);
  opacity: 0.9;
}

@keyframes overlay-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes overlay-slide-up {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* --- Debug badge --- */
.stage-debug-badge {
  position: fixed;
  bottom: 0.75rem;
  left: 0.75rem;
  z-index: 10000;
  padding: 0.3em 0.7em;
  border-radius: 6px;
  font-size: 0.7em;
  font-weight: 700;
  font-family: monospace;
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.25);
  pointer-events: none;
}