/* ===== PAGE TRANSITION STYLES ===== */

/* 페이지 전환 중 body 상태 */
body.page-transitioning {
    overflow: hidden;
}

/* 페이지 전환 오버레이 */
#page-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    pointer-events: none;
}

#page-transition-overlay.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

#page-transition-overlay.complete {
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* 전환 콘텐츠 */
.transition-content {
    text-align: center;
    color: var(--text-primary);
}

/* 로고 아이콘 */
.transition-logo {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    animation: pulse-logo 2s ease-in-out infinite;
    color: var(--link-color);
}

@keyframes pulse-logo {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}

/* 프로그레스 바 컨테이너 */
.transition-progress {
    width: 200px;
    height: 3px;
    background-color: var(--border-color);
    border-radius: 2px;
    margin: 0 auto 1rem;
    overflow: hidden;
    position: relative;
}

/* 프로그레스 바 */
.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--link-color), var(--link-hover));
    border-radius: 2px;
    transition: width 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 전환 텍스트 */
.transition-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    animation: fade-text 3s ease-in-out infinite;
}

@keyframes fade-text {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .transition-logo {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .transition-progress {
        width: 160px;
    }
    
    .transition-text {
        font-size: 0.8rem;
    }
}

/* 다크모드 특별 효과 */
[data-theme="dark"] #page-transition-overlay {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
}

[data-theme="dark"] .progress-bar {
    box-shadow: 0 0 10px rgba(88, 157, 246, 0.3);
}

/* 접근성 - 모션 감소 설정 시 애니메이션 단순화 */
@media (prefers-reduced-motion: reduce) {
    #page-transition-overlay {
        transition: opacity 0.2s ease;
    }
    
    .transition-logo {
        animation: none;
    }
    
    .transition-text {
        animation: none;
        opacity: 0.8;
    }
    
    .progress-bar::after {
        animation: none;
    }
}