/* ============================================
   ENHANCED MOBILE VERSE TOUCH INTERACTIONS
   ============================================
   
   Optimized CSS for smooth, responsive verse highlighting
   on mobile devices with improved touch feedback
*/

/* Performance optimizations for smooth animations */
@media (max-width: 1024px) {
    /* GPU acceleration for smooth transforms */
    .v,
    .verse-text,
    .verse-text-wrapper {
        transform: translate3d(0, 0, 0);
        backface-visibility: hidden;
        perspective: 1000px;
        will-change: transform, background-color, box-shadow;
    }
    
    /* Reduce motion for users who prefer it */
    @media (prefers-reduced-motion: reduce) {
        .v,
        .verse-text,
        .verse-text-wrapper {
            transition: none !important;
            animation: none !important;
            transform: none !important;
        }
        
        .v.selected,
        .verse-text.selected,
        .verse-text-wrapper.selected {
            transition: background-color 0.1s ease;
        }
    }
    
    /* Enhanced responsiveness for fast interactions */
    .v:active,
    .verse-text:active,
    .verse-text-wrapper:active {
        transition-duration: 0.1s;
    }
    
    /* Optimized selection feedback for touch devices */
    .v.touching,
    .verse-text.touching,
    .verse-text-wrapper.touching {
        transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    /* Prevent text selection on touch for cleaner interaction */
    .v,
    .verse-text,
    .verse-text-wrapper {
        -webkit-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Enhanced visual feedback for successful selection */
    .v.selected {
        animation: selectedPulse 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    }
    
    .verse-text.selected,
    .verse-text-wrapper.selected {
        animation: selectedSlide 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    /* Pulse animation for verse numbers */
    @keyframes selectedPulse {
        0% { 
            transform: scale(1) translateY(0);
            box-shadow: 0 2px 8px var(--user-highlight-bg-15);
        }
        30% { 
            transform: scale(1.1) translateY(-3px);
            box-shadow: 0 4px 16px var(--user-highlight-bg-25);
        }
        100% { 
            transform: scale(1.02) translateY(-2px);
            box-shadow: 0 2px 8px var(--user-highlight-bg-15);
        }
    }
    
    /* Slide animation for verse text */
    @keyframes selectedSlide {
        0% { 
            transform: translateX(0) scale(1);
            opacity: 0.8;
        }
        50% { 
            transform: translateX(6px) scale(1.01);
            opacity: 0.9;
        }
        100% { 
            transform: translateX(4px) scale(1);
            opacity: 1;
        }
    }
    
    /* Enhanced smooth deselection states for mobile */
    .v.deselecting {
        animation: deselectFadeMobile 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }
    
    .verse-text.deselecting,
    .verse-text-wrapper.deselecting {
        animation: deselectSlideMobile 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }
    
    /* Enhanced mobile deselection animations */
    @keyframes deselectFadeMobile {
        0% { 
            opacity: 1;
            transform: scale(1.02) translateY(-2px);
            background-color: var(--user-highlight-bg-25);
            box-shadow: 0 2px 8px var(--user-highlight-bg-15);
        }
        30% {
            opacity: 0.8;
            transform: scale(0.98) translateY(-1px);
            background-color: var(--user-highlight-bg-15);
            box-shadow: 0 1px 4px var(--user-highlight-bg-10);
        }
        70% {
            opacity: 0.4;
            transform: scale(0.95) translateY(0);
            background-color: var(--user-highlight-bg-05);
            box-shadow: 0 0 2px var(--user-highlight-bg-05);
        }
        100% { 
            opacity: 1;
            transform: scale(1) translateY(0);
            background-color: transparent;
            box-shadow: none;
            border: none;
        }
    }
    
    @keyframes deselectSlideMobile {
        0% { 
            opacity: 1;
            transform: translateX(4px) scale(1);
            background: var(--user-highlight-selected);
            border-left: 4px solid var(--user-highlight-border);
            box-shadow: 0 2px 12px var(--user-highlight-bg-15);
        }
        30% {
            opacity: 0.8;
            transform: translateX(3px) scale(0.99);
            background: var(--user-highlight-bg-20);
            border-left: 3px solid var(--user-highlight-border);
            box-shadow: 0 1px 6px var(--user-highlight-bg-10);
        }
        70% {
            opacity: 0.4;
            transform: translateX(1px) scale(0.98);
            background: var(--user-highlight-bg-10);
            border-left: 2px solid var(--user-highlight-bg-20);
            box-shadow: 0 0 3px var(--user-highlight-bg-05);
        }
        100% { 
            opacity: 1;
            transform: translateX(0) scale(1);
            background: transparent;
            border-left: none;
            box-shadow: none;
            padding: 8px 4px;
            margin: 2px 0;
        }
    }
    
    /* Optimized touch targets for better accessibility */
    .v {
        min-height: 32px;
        min-width: 32px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Enhanced visual hierarchy for selected verses */
    .v.selected {
        z-index: 10;
        position: relative;
    }
    
    .verse-text.selected,
    .verse-text-wrapper.selected {
        z-index: 5;
        position: relative;
    }
    
    /* Enhanced mobile-specific smooth transitions */
    .v {
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .verse-text,
    .verse-text-wrapper {
        transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    /* Smoother state changes for mobile */
    .v:not(.selected):not(.touching):not(.deselecting) {
        transition: 
            background-color 0.2s ease,
            transform 0.15s cubic-bezier(0.4, 0, 0.2, 1),
            box-shadow 0.2s ease;
    }
    
    .verse-text:not(.selected):not(.touching):not(.deselecting),
    .verse-text-wrapper:not(.selected):not(.touching):not(.deselecting) {
        transition: 
            background 0.25s ease,
            transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
            border-left 0.2s ease,
            box-shadow 0.25s ease;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .v.selected {
        border: 2px solid currentColor !important;
        background-color: highlight !important;
        color: highlighttext !important;
    }
    
    .verse-text.selected,
    .verse-text-wrapper.selected {
        border-left: 4px solid currentColor !important;
        background-color: highlight !important;
        color: highlighttext !important;
    }
}

/* Dark mode optimizations */
@media (prefers-color-scheme: dark) {
    .v.selected {
        box-shadow: 
            0 2px 12px var(--user-highlight-bg-20),
            0 0 0 1px var(--user-highlight-border),
            inset 0 1px 0 rgba(255, 255, 255, 0.1);
    }
    
    .verse-text.selected,
    .verse-text-wrapper.selected {
        box-shadow: 
            0 2px 16px var(--user-highlight-bg-25),
            0 4px 32px var(--user-highlight-bg-10),
            inset 0 1px 0 rgba(255, 255, 255, 0.05);
    }
}