/* 기본 페이드인 애니메이션 */
.fade-in-section {
  opacity: 0;
  transform: translateY(50px);
  visibility: hidden;
  transition: opacity 0.6s ease-out, 
              transform 0.6s ease-out, 
              visibility 0.6s ease-out;
  will-change: opacity, transform, visibility;
}

.fade-in-element {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out,
              transform 0.6s ease-out;
}

/* 활성화 상태 */
.is-visible {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

/* 각 섹션별 특별 애니메이션 */
.main-visual.fade-in-section {
  transform: translateY(0);
  opacity: 0;
  transition-duration: 1s;
}

.ceo-message .message-content.fade-in-element {
  transform: translateX(-50px);
}

.vision .vision-header.fade-in-element {
  transform: scale(0.95);
}

.vision .vision-grid.fade-in-element {
  transform: translateY(30px);
  transition-delay: 0.3s;
}

/* 연속적인 요소들의 지연 효과 */
.is-visible .fade-in-element:nth-child(1) { transition-delay: 0.1s; }
.is-visible .fade-in-element:nth-child(2) { transition-delay: 0.2s; }
.is-visible .fade-in-element:nth-child(3) { transition-delay: 0.3s; }

/* 섹션별 특별 애니메이션 */
.slide-in-left {
  opacity: 0;
  transform: translateX(-100px);
  transition: all 0.8s ease-out;
}

.slide-in-right {
  opacity: 0;
  transform: translateX(100px);
  transition: all 0.8s ease-out;
}

.scale-in {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.8s ease-out;
}

/* 타임라인 애니메이션 */
.timeline-animate .year {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s ease-out;
}

.timeline-animate .card {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s ease-out;
}

/* 활성화 상태에 따른 딜레이 */
.is-visible.timeline-animate .year {
  opacity: 1;
  transform: none;
}

.is-visible.timeline-animate .card {
  opacity: 1;
  transform: none;
}

.is-visible .card:nth-child(1) { transition-delay: 0.2s; }
.is-visible .card:nth-child(2) { transition-delay: 0.4s; }
.is-visible .card:nth-child(3) { transition-delay: 0.6s; }

/* CEO 메시지 특별 애니메이션 */
.ceo-message .message-text {
    opacity: 0;
    transform: translateX(-100px);
    transition: all 0.8s ease-out;
}

.ceo-message .message-visual {
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.8s ease-out;
}

.ceo-message.is-visible .message-text,
.ceo-message.is-visible .message-visual {
    opacity: 1;
    transform: translateX(0);
}

/* 헤더 부분 별도 애니메이션 */
.ceo-message .message-header {
    opacity: 0;
    transform: translateY(-30px);
    transition: all 0.6s ease-out;
}

.ceo-message.is-visible .message-header {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.2s;
}

/* 모바일 대응 */
@media (max-width: 1024px) {
    .ceo-message .message-text {
        transform: translateY(50px);
    }
    
    .ceo-message.is-visible .message-text {
        transform: translateY(0);
    }
}