/* ==================== 스크롤 힌트 오버레이 (STEP 1 전용) ==================== */

/* 오버레이 컨테이너 - STEP 1 카드에만 표시, 기본적으로 숨김 */
.scroll-hint-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none; /* 기본적으로 숨김, JS에서 모바일일 때만 표시 */
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 활성화 상태 */
.scroll-hint-overlay.active {
    display: flex;
    opacity: 1;
}

/* 힌트 컨테이너 - 정중앙 오른쪽에 배치 */
.scroll-hint-container {
    position: absolute;
    right: 15px; /* 오른쪽에서 15px 떨어진 위치 */
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 101;
}

/* 발광 효과 배경 */
.scroll-hint-glow {
    position: absolute;
    width: 100px;
    height: 100px;
    background: radial-gradient(
        circle,
        rgba(0, 208, 131, 0.25) 0%,
        rgba(0, 208, 131, 0.15) 40%,
        rgba(0, 208, 131, 0.05) 70%,
        transparent 100%
    );
    border-radius: 50%;
    animation: glowPulse 2.5s ease-in-out infinite;
    filter: blur(8px);
}

@keyframes glowPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.3);
        opacity: 1;
    }
}

/* 화살표 컨테이너 */
.scroll-hint-arrows {
    display: flex;
    align-items: center;
    gap: -8px; /* 화살표 간격을 겹치게 */
    position: relative;
}

/* 개별 화살표 스타일 */
.scroll-arrow {
    filter: drop-shadow(0 2px 8px rgba(0, 208, 131, 0.4));
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-arrow path {
    fill: #00D083;
}

/* 각 화살표에 다른 애니메이션 딜레이 적용 */
.scroll-arrow-1 {
    animation: arrowSlide 1.8s ease-in-out infinite;
    animation-delay: 0s;
    opacity: 0.4;
}

.scroll-arrow-2 {
    animation: arrowSlide 1.8s ease-in-out infinite;
    animation-delay: 0.3s;
    opacity: 0.7;
}

.scroll-arrow-3 {
    animation: arrowSlide 1.8s ease-in-out infinite;
    animation-delay: 0.6s;
    opacity: 1;
}

/* 화살표 슬라이드 애니메이션 - 오른쪽으로 흐르는 효과 */
@keyframes arrowSlide {
    0%, 100% {
        transform: translateX(0) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translateX(8px) scale(1.1);
        opacity: 1;
    }
}

/* 텍스트 힌트 */
.scroll-hint-text {
    font-size: 13px;
    font-weight: 700;
    color: #00D083;
    background: linear-gradient(135deg, #FFFFFF 0%, rgba(255, 255, 255, 0.95) 100%);
    padding: 6px 14px;
    border-radius: 20px;
    box-shadow: 
        0 2px 8px rgba(0, 208, 131, 0.15),
        0 4px 16px rgba(0, 208, 131, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border: 1.5px solid rgba(0, 208, 131, 0.3);
    letter-spacing: 0.3px;
    position: relative;
    animation: textBounce 2.5s ease-in-out infinite;
    margin-top: 4px;
    white-space: nowrap;
}

@keyframes textBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-4px);
    }
}

/* 텍스트에 섬세한 발광 효과 */
.scroll-hint-text::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, rgba(0, 208, 131, 0.2), rgba(0, 208, 131, 0.05));
    border-radius: 22px;
    z-index: -1;
    opacity: 0;
    animation: textGlow 2.5s ease-in-out infinite;
}

@keyframes textGlow {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 0.6;
    }
}

/* 페이드 아웃 애니메이션 */
.scroll-hint-overlay.fade-out {
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 모바일 환경에서만 표시 (데스크톱에서는 완전히 숨김) */
@media (min-width: 769px) {
    .scroll-hint-overlay {
        display: none !important;
    }
}

/* 작은 모바일 화면 최적화 */
@media (max-width: 380px) {
    .scroll-hint-container {
        right: 10px;
    }
    
    .scroll-arrow {
        width: 28px;
        height: 28px;
    }
    
    .scroll-hint-text {
        font-size: 12px;
        padding: 5px 12px;
    }
    
    .scroll-hint-glow {
        width: 80px;
        height: 80px;
    }
}

/* 매우 작은 화면 (320px 이하) */
@media (max-width: 320px) {
    .scroll-hint-container {
        right: 8px;
    }
    
    .scroll-arrow {
        width: 24px;
        height: 24px;
    }
    
    .scroll-hint-text {
        font-size: 11px;
        padding: 4px 10px;
    }
}

/* 고해상도 디스플레이 최적화 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .scroll-arrow {
        filter: drop-shadow(0 2px 10px rgba(0, 208, 131, 0.5));
    }
    
    .scroll-hint-text {
        box-shadow: 
            0 3px 10px rgba(0, 208, 131, 0.2),
            0 5px 20px rgba(0, 208, 131, 0.12),
            inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }
}

/* 접근성: 모션 감소 설정 시 애니메이션 단순화 */
@media (prefers-reduced-motion: reduce) {
    .scroll-hint-overlay,
    .scroll-hint-glow,
    .scroll-arrow,
    .scroll-hint-text,
    .scroll-hint-text::before {
        animation: none !important;
        transition: opacity 0.3s ease !important;
    }
    
    .scroll-arrow-1,
    .scroll-arrow-2 {
        opacity: 0.5;
    }
    
    .scroll-arrow-3 {
        opacity: 1;
    }
}

/* 다크모드 대응 (필요시) */
@media (prefers-color-scheme: dark) {
    .scroll-hint-text {
        background: linear-gradient(135deg, rgba(26, 26, 26, 0.98) 0%, rgba(26, 26, 26, 0.95) 100%);
        color: #76E0BA;
        border-color: rgba(118, 224, 186, 0.4);
    }
    
    .scroll-arrow path {
        fill: #76E0BA;
    }
    
    .scroll-hint-glow {
        background: radial-gradient(
            circle,
            rgba(118, 224, 186, 0.2) 0%,
            rgba(118, 224, 186, 0.12) 40%,
            rgba(118, 224, 186, 0.04) 70%,
            transparent 100%
        );
    }
}

/* ==================== 모바일 전용 스크롤 안내 문구 (카드 영역 하단) ==================== */

/* 기본 상태: 완전히 숨김 (JS에서 display 제어) */
.mobile-scroll-guide {
    display: none; /* JS에서 display: flex로 변경 */
    position: relative;
    width: 100%;
    padding: 20px 0;
    justify-content: center;
    align-items: center;
    background: transparent;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

/* 활성화 상태 (JS에서 클래스 추가) */
.mobile-scroll-guide.active {
    opacity: 1;
    visibility: visible;
}

/* 페이드 아웃 애니메이션 */
.mobile-scroll-guide.fade-out {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

/* 안내 문구 컨테이너 */
.scroll-guide-content {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, rgba(0, 208, 131, 0.08) 0%, rgba(118, 224, 186, 0.08) 100%);
    border: 2px solid rgba(0, 208, 131, 0.2);
    border-radius: 50px;
    box-shadow: 
        0 4px 16px rgba(0, 208, 131, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    animation: guidePulse 2.5s ease-in-out infinite;
}

/* 펄스 애니메이션 */
@keyframes guidePulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 
            0 4px 16px rgba(0, 208, 131, 0.12),
            inset 0 1px 0 rgba(255, 255, 255, 0.8);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 
            0 6px 20px rgba(0, 208, 131, 0.18),
            inset 0 1px 0 rgba(255, 255, 255, 0.9);
    }
}

/* 아이콘 스타일 */
.scroll-guide-icon {
    width: 20px;
    height: 20px;
    color: #00D083;
    animation: iconSlide 1.5s ease-in-out infinite;
}

.scroll-guide-icon path {
    fill: currentColor;
}

/* 아이콘 슬라이드 애니메이션 */
@keyframes iconSlide {
    0%, 100% {
        transform: translateX(0);
        opacity: 0.7;
    }
    50% {
        transform: translateX(4px);
        opacity: 1;
    }
}

/* 텍스트 스타일 */
.scroll-guide-text {
    font-size: 14px;
    font-weight: 700;
    color: #00D083;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

/* 모바일 작은 화면 최적화 (380px 이하) */
@media (max-width: 380px) {
    .scroll-guide-content {
        padding: 10px 20px;
        gap: 6px;
    }
    
    .scroll-guide-icon {
        width: 18px;
        height: 18px;
    }
    
    .scroll-guide-text {
        font-size: 13px;
    }
}

/* 매우 작은 화면 (320px 이하) */
@media (max-width: 320px) {
    .scroll-guide-content {
        padding: 8px 16px;
    }
    
    .scroll-guide-icon {
        width: 16px;
        height: 16px;
    }
    
    .scroll-guide-text {
        font-size: 12px;
    }
}

/* 접근성: 모션 감소 설정 시 애니메이션 단순화 */
@media (prefers-reduced-motion: reduce) {
    .scroll-guide-content,
    .scroll-guide-icon {
        animation: none !important;
    }
    
    .mobile-scroll-guide {
        transition: opacity 0.3s ease !important;
    }
}

/* 다크모드 대응 (안내 문구) */
@media (prefers-color-scheme: dark) {
    .scroll-guide-content {
        background: linear-gradient(135deg, rgba(118, 224, 186, 0.12) 0%, rgba(118, 224, 186, 0.08) 100%);
        border-color: rgba(118, 224, 186, 0.3);
    }
    
    .scroll-guide-icon {
        color: #76E0BA;
    }
    
    .scroll-guide-text {
        color: #76E0BA;
    }
}