/* 고벽지지(전통 벽지) 효과 스타일 */

/* 기본 설정 */
.wallpaper-paste,
.gobbyeokji-card {
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s ease;
}

/* 스크롤 붙이기 효과 - 초기 상태 */
.wallpaper-paste {
    opacity: 0;
    transform: translateY(-30px) rotateX(-15deg) scale(0.95);
    filter: blur(2px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                filter 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 스크롤 붙이기 효과 - 활성화 상태 */
.wallpaper-paste.pasted {
    opacity: 1;
    transform: translateY(0) rotateX(0) scale(1);
    filter: blur(0);
}

/* 호버 3D 효과 */
.gobbyeokji-card {
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    background: transparent;
}

.gobbyeokji-card:hover {
    transform: perspective(1000px) rotateY(-5deg) translateY(-8px) rotateX(2deg);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 30px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.gobbyeokji-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        transparent 50%, 
        rgba(0, 0, 0, 0.05) 100%);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.gobbyeokji-card:hover::before {
    opacity: 1;
}

/* 종이 질감 효과 */
.gobbyeokji-card img {
    transition: transform 0.3s ease;
    border-radius: 4px;
}

.gobbyeokji-card:hover img {
    transform: scale(1.02);
}

/* 순차적 애니메이션을 위한 딜레이 클래스 */
.wallpaper-paste.delay-1 { transition-delay: 0.1s; }
.wallpaper-paste.delay-2 { transition-delay: 0.2s; }
.wallpaper-paste.delay-3 { transition-delay: 0.3s; }
.wallpaper-paste.delay-4 { transition-delay: 0.4s; }
.wallpaper-paste.delay-5 { transition-delay: 0.5s; }

/* 모바일 최적화 */
@media (max-width: 768px) {
    .wallpaper-paste {
        transform: translateY(-20px) rotateX(-8deg) scale(0.98);
        transition-duration: 0.6s;
    }
    
    .gobbyeokji-card:hover {
        transform: perspective(800px) rotateY(-3deg) translateY(-4px) rotateX(1deg);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
    }
    
    .wallpaper-paste.delay-1 { transition-delay: 0.05s; }
    .wallpaper-paste.delay-2 { transition-delay: 0.1s; }
    .wallpaper-paste.delay-3 { transition-delay: 0.15s; }
    .wallpaper-paste.delay-4 { transition-delay: 0.2s; }
    .wallpaper-paste.delay-5 { transition-delay: 0.25s; }
}

/* 접근성 - 애니메이션 비활성화 */
@media (prefers-reduced-motion: reduce) {
    .wallpaper-paste,
    .gobbyeokji-card,
    .wallpaper-paste img,
    .gobbyeokji-card img {
        transition: none;
        transform: none;
        animation: none;
    }
    
    .wallpaper-paste {
        opacity: 1;
        filter: none;
    }
    
    .gobbyeokji-card:hover {
        transform: none;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }
}

/* 다크모드 지원 */
@media (prefers-color-scheme: dark) {
    .gobbyeokji-card {
        background: transparent;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    
    .gobbyeokji-card:hover {
        box-shadow: 
            0 20px 40px rgba(0, 0, 0, 0.4),
            0 0 30px rgba(0, 0, 0, 0.2),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
}

/* 로딩 상태 */
.wallpaper-paste.loading {
    animation: subtle-pulse 2s ease-in-out infinite;
}

@keyframes subtle-pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}