/* ==========================================================================
   Micro Interactions & Animation Enhancements for EineCosmetics
   ========================================================================== */

/* 부드러운 버튼 상호작용 */
.btn {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: 0;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn * {
    position: relative;
    z-index: 1;
}

/* 버튼 클릭 효과 */
.btn:active {
    transform: scale(0.98);
    transition: transform var(--duration-fast);
}

/* 카드 호버 개선 */
.feature-card,
.case-study-card,
.product-category-card {
    transition: all var(--transition-base);
    cursor: pointer;
    transform-origin: center bottom;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
}

.case-study-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.product-category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* 카드 내부 요소 애니메이션 */
.feature-icon,
.case-icon,
.category-icon {
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon,
.case-study-card:hover .case-icon,
.product-category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

/* 링크 호버 효과 */
.feature-detail,
.news-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-base);
}

.feature-detail::after,
.news-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.feature-detail:hover::after,
.news-link:hover::after {
    width: 100%;
}

.feature-detail i,
.news-link i {
    transition: transform var(--transition-base);
    margin-left: var(--space-1);
}

.feature-detail:hover i,
.news-link:hover i {
    transform: translateX(4px);
}

/* 탭 전환 애니메이션 */
.tab-btn {
    position: relative;
    transition: all var(--transition-base);
    overflow: hidden;
}

.tab-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-color);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.tab-btn.active::before,
.tab-btn:hover::before {
    width: 100%;
}

.tab-btn:active {
    transform: scale(0.95);
}

/* 통계 숫자 애니메이션 */
.stat-number {
    display: inline-block;
    transition: transform var(--transition-base);
}

.stat-item:hover .stat-number {
    transform: scale(1.1);
}

/* 로딩 애니메이션 */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: var(--space-2);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 펄스 애니메이션 */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* 페이드 인 애니메이션 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 스케일 인 애니메이션 */
.scale-in {
    opacity: 0;
    transform: scale(0.8);
    animation: scaleIn 0.5s ease forwards;
}

@keyframes scaleIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 슬라이드 인 애니메이션 */
.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    animation: slideInLeft 0.5s ease forwards;
}

.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    animation: slideInRight 0.5s ease forwards;
}

@keyframes slideInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 스크롤 진행 표시기 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(239, 105, 90, 0.2);
    z-index: var(--z-fixed);
}

.scroll-progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width 0.1s ease;
}

/* 플로팅 액션 버튼 */
.floating-action-btn {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
    cursor: pointer;
    opacity: 0;
    transform: scale(0);
}

.floating-action-btn.visible {
    opacity: 1;
    transform: scale(1);
}

.floating-action-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-2xl);
}

.floating-action-btn:active {
    transform: scale(0.9);
}

/* 툴팁 애니메이션 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-tooltip);
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--text-primary);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.tooltip:hover::before,
.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-2px);
}

/* 입력 필드 포커스 효과 */
input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(239, 105, 90, 0.1);
    outline: none;
    transition: all var(--transition-base);
}

/* 체크박스/라디오 버튼 커스텀 애니메이션 */
.custom-checkbox,
.custom-radio {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.custom-checkbox input,
.custom-radio input {
    opacity: 0;
    position: absolute;
}

.custom-checkbox .checkmark,
.custom-radio .checkmark {
    width: 20px;
    height: 20px;
    background: white;
    border: 2px solid var(--border-color);
    margin-right: var(--space-2);
    position: relative;
    transition: all var(--transition-base);
}

.custom-checkbox .checkmark {
    border-radius: var(--radius-xs);
}

.custom-radio .checkmark {
    border-radius: 50%;
}

.custom-checkbox input:checked + .checkmark,
.custom-radio input:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.custom-checkbox .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform var(--transition-base);
}

.custom-checkbox input:checked + .checkmark::after {
    transform: rotate(45deg) scale(1);
}

.custom-radio .checkmark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
    transform: translate(-50%, -50%) scale(0);
    transition: transform var(--transition-base);
}

.custom-radio input:checked + .checkmark::after {
    transform: translate(-50%, -50%) scale(1);
}

/* 모션 감소 설정 준수 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-progress,
    .floating-action-btn,
    .loading-spinner {
        animation: none !important;
    }
}