/* ==========================================================================
   MAIN LAYOUT & ANIMATION STYLES
   ========================================================================== */

/* Main wrapper */
.site-wrapper {
  position: relative;
  width: 100%;
  overflow-x: hidden;
  background-color: var(--color-ground);
}

/* Narrative sections container */
.narrative-container {
  width: 100%;
  display: flex;
  flex-direction: column;
}

/* Visibility states for first-visit vs returning-visit */
.hidden-by-default {
  display: none !important;
}

.visible-flow {
  display: flex !important;
}

/* Section entrance animations with IntersectionObserver */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-lively) var(--ease-out-expo), transform var(--duration-lively) var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out-expo), transform var(--duration-slow) var(--ease-out-expo);
}

.reveal-stagger.is-revealed > *:nth-child(1) { transition-delay: 100ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-revealed > *:nth-child(2) { transition-delay: 200ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-revealed > *:nth-child(3) { transition-delay: 300ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-revealed > *:nth-child(4) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-revealed > *:nth-child(5) { transition-delay: 500ms; opacity: 1; transform: translateY(0); }

/* Keyframe animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseSubtle {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}

/* Callback echo highlight */
.callback-echo {
  color: var(--color-light-pure);
  font-style: italic;
  padding: 0 4px;
  background: rgba(87, 98, 83, 0.4);
  border-radius: var(--radius-xs);
}

/* Tonal shift backgrounds for specific major scenes */
.scene-tonal-alt {
  background-color: #898f77;
}

.scene-tonal-deep {
  background-color: #4b5447;
  color: var(--color-light-pure);
}

.scene-tonal-deep .narrative-p {
  color: var(--color-light-pure);
}

.scene-tonal-deep .section-index {
  background: var(--color-light-pure);
  color: #3e473b;
}

.scene-tonal-light {
  background-color: #AFB5A7;
  color: #3e473b;
}

.scene-tonal-light .narrative-p,
.scene-tonal-light .section-title-large {
  color: #2b3127;
}

/* Container limits */
.container-narrow {
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
}

.container-medium {
  max-width: var(--container-medium);
  margin-left: auto;
  margin-right: auto;
}

.container-wide {
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .gate-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .gate-actions .btn-primary {
    width: 100%;
  }

  .narrative-scene {
    padding: var(--space-xl) var(--space-md);
  }

  .statement-box {
    padding: var(--space-lg) 0;
  }

  .quiz-btn {
    padding: var(--space-sm);
  }

  .btn-whatsapp {
    width: 100%;
  }
}