/**
 * Before/After Slider CSS
 * 전후 비교 슬라이더 스타일시트
 *
 * @version 2.0.0
 */

/* =====================================================
   Main Container
   ===================================================== */
.before-after-container {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 3rem auto;
    border-radius: var(--radius-xl, 24px);
    overflow: hidden;
    background: #1a1a2e;
    box-shadow:
        0 10px 40px rgba(26, 95, 122, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.before-after-container:hover {
    transform: translateY(-8px);
    box-shadow:
        0 20px 60px rgba(26, 95, 122, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 0 60px rgba(52, 152, 219, 0.15);
}

.before-after-container.is-dragging {
    cursor: ew-resize;
    user-select: none;
}

.before-after-container.is-visible {
    animation: containerReveal 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes containerReveal {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* =====================================================
   Wrapper
   ===================================================== */
.before-after-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    cursor: ew-resize;
}

/* 터치 디바이스에서 스크롤 방지 */
.before-after-wrapper {
    touch-action: pan-y pinch-zoom;
}

/* =====================================================
   Images
   ===================================================== */
.before-image,
.after-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    user-select: none;
    -webkit-user-drag: none;
}

.before-image {
    z-index: 1;
}

.after-image {
    z-index: 2;
    clip-path: inset(0 50% 0 0);
    transition: clip-path 0.05s ease-out;
}

/* 이미지 로딩 시 페이드 인 */
.before-image.loaded,
.after-image.loaded {
    animation: imageLoad 0.5s ease-out;
}

@keyframes imageLoad {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* =====================================================
   Comparison Slider
   ===================================================== */
.comparison-slider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 3px;
    height: 100%;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(244, 208, 63, 0.8) 10%,
        #f4d03f 50%,
        rgba(244, 208, 63, 0.8) 90%,
        transparent 100%
    );
    z-index: 10;
    transform: translateX(-50%);
    cursor: ew-resize;
    box-shadow:
        0 0 10px rgba(244, 208, 63, 0.5),
        0 0 20px rgba(244, 208, 63, 0.3);
    transition: background 0.2s ease, box-shadow 0.2s ease;
}

.is-dragging .comparison-slider {
    background: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(255, 107, 53, 0.8) 10%,
        #ff6b35 50%,
        rgba(255, 107, 53, 0.8) 90%,
        transparent 100%
    );
    box-shadow:
        0 0 15px rgba(255, 107, 53, 0.6),
        0 0 30px rgba(255, 107, 53, 0.4);
}

/* =====================================================
   Slider Handle
   ===================================================== */
.slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #f4d03f 0%, #e6c229 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: ew-resize;
    z-index: 11;
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.3),
        0 0 0 3px rgba(255, 255, 255, 0.3),
        inset 0 2px 0 rgba(255, 255, 255, 0.4),
        inset 0 -2px 0 rgba(0, 0, 0, 0.1);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.2s ease;
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow:
            0 4px 15px rgba(0, 0, 0, 0.3),
            0 0 0 3px rgba(255, 255, 255, 0.3),
            0 0 20px rgba(244, 208, 63, 0.3),
            inset 0 2px 0 rgba(255, 255, 255, 0.4),
            inset 0 -2px 0 rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow:
            0 4px 15px rgba(0, 0, 0, 0.3),
            0 0 0 3px rgba(255, 255, 255, 0.5),
            0 0 40px rgba(244, 208, 63, 0.5),
            inset 0 2px 0 rgba(255, 255, 255, 0.4),
            inset 0 -2px 0 rgba(0, 0, 0, 0.1);
    }
}

.slider-handle:hover,
.slider-handle.active {
    transform: translate(-50%, -50%) scale(1.15);
    box-shadow:
        0 6px 25px rgba(0, 0, 0, 0.4),
        0 0 0 4px rgba(255, 255, 255, 0.5),
        0 0 50px rgba(244, 208, 63, 0.6),
        inset 0 2px 0 rgba(255, 255, 255, 0.4),
        inset 0 -2px 0 rgba(0, 0, 0, 0.1);
}

.is-dragging .slider-handle {
    transform: translate(-50%, -50%) scale(1.2);
    background: linear-gradient(135deg, #ff6b35 0%, #d45a2b 100%);
}

/* 화살표 아이콘 */
.slider-handle::before {
    content: '◀ ▶';
    font-size: 11px;
    color: #1a5f7a;
    font-weight: 900;
    letter-spacing: 3px;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

/* 커스텀 SVG 아이콘 (대체) */
.slider-handle.icon-arrows::before {
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231a5f7a'%3E%3Cpath d='M8.59 16.59L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.41z'/%3E%3Cpath d='M15.41 16.59L10.83 12l4.58-4.59L14 6l-6 6 6 6 1.41-1.41z' transform='scale(-1,1) translate(-24,0)'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

/* =====================================================
   Labels
   ===================================================== */
.before-label,
.after-label {
    position: absolute;
    top: 16px;
    padding: 10px 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 25px;
    z-index: 5;
    color: #fff;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    user-select: none;
}

.before-label {
    left: 16px;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.9) 0%, rgba(192, 57, 43, 0.9) 100%);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
}

.after-label {
    right: 16px;
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.9) 0%, rgba(39, 174, 96, 0.9) 100%);
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.4);
}

/* 호버 시 강조 */
.before-after-container:hover .before-label,
.before-after-container:hover .after-label {
    transform: translateY(-3px);
}

/* =====================================================
   Title Overlay
   ===================================================== */
.before-after-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 60px 30px 30px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.5) 50%, transparent 100%);
    color: #fff;
    z-index: 5;
}

.before-after-title h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: #fff;
}

.before-after-title p {
    font-size: 0.95rem;
    opacity: 0.85;
    margin: 0;
    line-height: 1.6;
}

/* =====================================================
   Mini Slider (Portfolio Grid)
   ===================================================== */
.before-after-mini {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--radius-lg, 16px) var(--radius-lg, 16px) 0 0;
}

.before-after-mini .before-image,
.before-after-mini .after-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.before-after-mini .after-image {
    clip-path: inset(0 0 0 0);
}

.before-after-mini .comparison-slider {
    width: 2px;
    background: rgba(244, 208, 63, 0.9);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.before-after-mini:hover .comparison-slider {
    opacity: 1;
}

.before-after-mini .slider-handle {
    width: 40px;
    height: 40px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.before-after-mini:hover .slider-handle {
    opacity: 1;
}

.before-after-mini .slider-handle::before {
    font-size: 9px;
    letter-spacing: 2px;
}

/* 미니 라벨 */
.before-after-mini .before-label,
.before-after-mini .after-label {
    padding: 6px 12px;
    font-size: 10px;
    letter-spacing: 1px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.before-after-mini:hover .before-label,
.before-after-mini:hover .after-label {
    opacity: 1;
}

/* 이미지 확대 효과 */
.portfolio-item:hover .before-after-mini .before-image,
.portfolio-item:hover .before-after-mini .after-image {
    transform: scale(1.05);
}

/* =====================================================
   Full Width Variant
   ===================================================== */
.before-after-container.full-width {
    max-width: none;
    border-radius: 0;
    margin: 0;
}

.before-after-container.full-width .before-after-wrapper {
    aspect-ratio: 21/9;
}

/* =====================================================
   Vertical Variant
   ===================================================== */
.before-after-container.vertical .before-after-wrapper {
    aspect-ratio: 3/4;
}

.before-after-container.vertical .comparison-slider {
    width: 100%;
    height: 3px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    background: linear-gradient(
        to right,
        transparent 0%,
        rgba(244, 208, 63, 0.8) 10%,
        #f4d03f 50%,
        rgba(244, 208, 63, 0.8) 90%,
        transparent 100%
    );
}

.before-after-container.vertical .slider-handle {
    cursor: ns-resize;
}

.before-after-container.vertical .slider-handle::before {
    content: '▲ ▼';
    letter-spacing: 0;
    line-height: 1.2;
}

.before-after-container.vertical .after-image {
    clip-path: inset(0 0 50% 0);
}

.before-after-container.vertical .before-label {
    top: auto;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
}

.before-after-container.vertical .after-label {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
}

/* =====================================================
   Lens Mode
   ===================================================== */
.before-after-container.lens-mode .after-image {
    clip-path: circle(100px at 50% 50%);
    transition: clip-path 0.05s ease-out;
}

.before-after-container.lens-mode .comparison-slider,
.before-after-container.lens-mode .slider-handle {
    display: none;
}

.before-after-container.lens-mode .lens-cursor {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 3px solid #f4d03f;
    border-radius: 50%;
    pointer-events: none;
    z-index: 10;
    box-shadow:
        0 0 20px rgba(244, 208, 63, 0.5),
        inset 0 0 20px rgba(244, 208, 63, 0.2);
    transform: translate(-50%, -50%);
}

/* =====================================================
   Loading State
   ===================================================== */
.before-after-container.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #1a1a2e;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.before-after-container.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 3px solid rgba(244, 208, 63, 0.2);
    border-top-color: #f4d03f;
    border-radius: 50%;
    z-index: 101;
    animation: spinLoader 0.8s linear infinite;
}

@keyframes spinLoader {
    to {
        transform: rotate(360deg);
    }
}

/* =====================================================
   Error State
   ===================================================== */
.parking-error {
    padding: 40px;
    background: #fff5f5;
    border: 1px solid #feb2b2;
    border-radius: var(--radius-md, 12px);
    color: #c53030;
    text-align: center;
    font-weight: 500;
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 768px) {
    .before-after-container {
        margin: 2rem 1rem;
        border-radius: var(--radius-lg, 16px);
    }

    .before-after-wrapper {
        aspect-ratio: 4/3;
    }

    .slider-handle {
        width: 48px;
        height: 48px;
    }

    .slider-handle::before {
        font-size: 10px;
        letter-spacing: 2px;
    }

    .before-label,
    .after-label {
        padding: 8px 14px;
        font-size: 10px;
        letter-spacing: 1.5px;
    }

    .before-after-title {
        padding: 40px 20px 20px;
    }

    .before-after-title h3 {
        font-size: 1.2rem;
    }

    .before-after-title p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .before-after-container {
        margin: 1.5rem 0.5rem;
        border-radius: var(--radius-md, 12px);
    }

    .slider-handle {
        width: 44px;
        height: 44px;
    }

    .before-label,
    .after-label {
        padding: 6px 12px;
        font-size: 9px;
    }

    .before-after-title {
        padding: 30px 15px 15px;
    }
}

/* =====================================================
   Accessibility
   ===================================================== */
.slider-handle:focus {
    outline: none;
    box-shadow:
        0 0 0 4px rgba(244, 208, 63, 0.5),
        0 6px 25px rgba(0, 0, 0, 0.4);
}

.slider-handle:focus-visible {
    outline: 3px solid #2980b9;
    outline-offset: 3px;
}

/* =====================================================
   Print
   ===================================================== */
@media print {
    .before-after-container {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .comparison-slider,
    .slider-handle {
        display: none;
    }

    .before-label,
    .after-label {
        background: #000;
        color: #fff;
    }
}

/* =====================================================
   Reduced Motion
   ===================================================== */
@media (prefers-reduced-motion: reduce) {
    .before-after-container,
    .before-after-container:hover,
    .slider-handle,
    .slider-handle:hover,
    .before-label,
    .after-label {
        animation: none !important;
        transition: none !important;
    }

    .before-after-container:hover {
        transform: none;
    }

    @keyframes pulseGlow {
        0%, 100% {
            box-shadow:
                0 4px 15px rgba(0, 0, 0, 0.3),
                0 0 0 3px rgba(255, 255, 255, 0.3);
        }
    }
}