/**
 * Lens Professional Slideshow Styles
 * Modern design with smooth animations
 * Version: 2.1.0 - Optimized & Secured
 * CSP-Safe: No inline styles, external resources validated
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */

:root {
    --lens-slide-gap: 30px;
    --lens-slide-padding: 150px;
    --lens-transition-duration: 0.6s;
    --lens-transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --lens-control-size: 50px;
    --lens-control-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --lens-control-hover: linear-gradient(135deg, #764ba2 0%, #8b7aeb 100%);
    --lens-control-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
    --lens-indicator-size: 10px;
    --lens-indicator-active-width: 30px;
    --lens-progress-height: 4px;
    --lens-inactive-opacity: 0.5;
    --lens-inactive-scale: 0.95;
    --lens-controls-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%,
rgba(118, 75, 162, 0.1) 100%);
    --lens-controls-border: rgba(102, 126, 234, 0.2);
    --lens-counter-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%,
rgba(118, 75, 162, 0.15) 100%);
}

/* ============================================
   CONTAINER & GRID
   ============================================ */

.lens-section.lens-slideshow-enabled {
    position: relative;
    overflow: hidden;
    padding-bottom: var(--lens-slide-padding) !important;
    contain: layout style;
    content-visibility: auto;
}

.lens-carousel-track {
    display: flex !important;
    transition: transform var(--lens-transition-duration) var(--lens-transition-ease);
    will-change: transform;
    gap: var(--lens-slide-gap);
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    contain: layout style;
    /* SECURITY: Prevent manipulation */
    touch-action: pan-y pinch-zoom;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* SECURITY: Block injected inline styles */
.lens-carousel-track[style*="transition"],
.lens-carousel-track[style*="transform"],
.lens-carousel-track[style*="animation"] {
    animation: none !important;
}

.lens-carousel-track .lens-card {
    flex-shrink: 0;
    transition: opacity var(--lens-transition-duration) ease, 
                transform var(--lens-transition-duration) ease;
    backface-visibility: hidden;
}

/* ============================================
   SLIDE STATES
   ============================================ */

.lens-slide-active .lens-card {
    opacity: 1;
    transform: scale(1);
}

.lens-slide:not(.lens-slide-active) .lens-card {
    opacity: var(--lens-inactive-opacity);
    transform: scale(var(--lens-inactive-scale));
}

.lens-slide-active .lens-card:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
    z-index: 10;
}

/* ============================================
   MODERN CONTROLS
   ============================================ */

.lens-modern-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 20px 35px;
    background: var(--lens-controls-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 60px;
    border: 1px solid var(--lens-controls-border);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    z-index: 1000;
    contain: layout style;
}

/* Navigation Buttons */
.lens-nav-btn {
    width: var(--lens-control-size);
    height: var(--lens-control-size);
    border-radius: 50%;
    border: none;
    background: var(--lens-control-bg);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s var(--lens-transition-ease);
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    touch-action: manipulation;
    user-select: none;
}

.lens-nav-btn svg {
    width: 24px;
    height: 24px;
    position: relative;
    z-index: 2;
    pointer-events: none;
}

.lens-nav-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--lens-control-hover);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lens-nav-btn:hover::before {
    opacity: 1;
}

.lens-nav-btn:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: var(--lens-control-shadow);
}

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

.lens-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.lens-nav-btn:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 3px;
}

/* Progress Container */
.lens-progress-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    min-width: 250px;
}

/* Slide Indicators */
.lens-slide-indicators {
    display: flex;
    gap: 8px;
}

.lens-indicator {
    width: var(--lens-indicator-size);
    height: var(--lens-indicator-size);
    border-radius: 50%;
    border: 2px solid var(--lens-controls-border);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s var(--lens-transition-ease);
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.lens-indicator:hover {
    border-color: rgba(102, 126, 234, 0.6);
    transform: scale(1.2);
}

.lens-indicator.active {
    width: var(--lens-indicator-active-width);
    border-radius: 5px;
    background: var(--lens-control-bg);
    border-color: #667eea;
}

.lens-indicator:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 3px;
}

/* Progress Track */
.lens-progress-track {
    width: 100%;
    height: var(--lens-progress-height);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.lens-progress-active {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    border-radius: 2px;
    transition: width var(--lens-transition-duration) var(--lens-transition-ease);
    position: relative;
    will-change: width;
}

.lens-progress-active::after {
    content: '';
    position: absolute;
    inset: 0;
    width: 30%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4));
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(200%); }
}

/* ============================================
   SLIDE COUNTER
   ============================================ */

.lens-slide-counter {
    position: absolute;
    top: 20px;
    right: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--lens-counter-bg);
    backdrop-filter: blur(10px);
    border-radius: 30px;
    border: 1px solid var(--lens-controls-border);
    font-weight: 600;
    z-index: 100;
    contain: layout style;
}

.lens-current-num {
    font-size: 24px;
    color: #667eea;
    font-weight: 700;
}

.lens-separator {
    color: rgba(255, 255, 255, 0.3);
    font-size: 18px;
}

.lens-total-num {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
    .lens-slide {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .lens-section.lens-slideshow-enabled {
        padding: 40px 15px !important;
        overflow: visible !important;
    }

    .lens-carousel-track {
        display: block !important;
        width: 100% !important;
        gap: 20px;
        padding: 0 !important;
        transform: none !important;
        transition: none !important;
    }

    .lens-carousel-track .lens-card,
    .lens-slide-active .lens-card,
    .lens-slide:not(.lens-slide-active) .lens-card {
        flex-shrink: initial;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 0 20px 0 !important;
        opacity: 1 !important;
        transform: scale(1) !important;
    }

    .lens-slide {
        display: block !important;
        width: 100% !important;
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 !important;
        margin: 0 !important;
    }

    .lens-modern-controls,
    .lens-slide-counter {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .lens-section.lens-slideshow-enabled {
        padding: 30px 10px !important;
    }

    .lens-carousel-track {
        gap: 15px;
    }

    .lens-carousel-track .lens-card {
        margin: 0 0 15px 0 !important;
    }
}

/* ============================================
   TOUCH DEVICE ENHANCEMENTS
   ============================================ */

@media (hover: none) and (pointer: coarse) {
    .lens-nav-btn:active {
        background: var(--lens-control-hover);
        transform: scale(0.95);
    }
}

/* ============================================
   ACCESSIBILITY & PREFERENCES
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .lens-carousel-track,
    .lens-carousel-track .lens-card,
    .lens-nav-btn,
    .lens-indicator,
    .lens-progress-active {
        transition: none !important;
        animation: none !important;
        will-change: auto;
    }
    
    .lens-nav-btn:hover:not(:disabled) {
        transform: none;
    }
    
    .lens-progress-active::after {
        animation: none;
    }
}

@media (prefers-contrast: high) {
    .lens-modern-controls,
    .lens-nav-btn {
        border: 2px solid currentColor;
    }
    
    .lens-nav-btn:focus-visible,
    .lens-indicator:focus-visible {
        outline-width: 3px;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --lens-controls-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%,
rgba(118, 75, 162, 0.15) 100%);
        --lens-counter-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%,
rgba(118, 75, 162, 0.2) 100%);
    }
    
    .lens-modern-controls {
        box-shadow: 
            0 20px 60px rgba(0, 0, 0, 0.5),
            inset 0 1px 0 rgba(255, 255, 255, 0.15);
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .lens-modern-controls,
    .lens-slide-counter {
        display: none !important;
    }
    
    .lens-carousel-track .lens-card {
        opacity: 1 !important;
        transform: none !important;
        page-break-inside: avoid;
    }
    
    .lens-carousel-track {
        transform: none !important;
    }
}