/**
 * Button Loading States CSS
 * Provides enhanced styling for button loading states
 * Works alongside Tailwind CSS classes
 */

/* Loading state base styles */
.loading-state {
    position: relative;
    pointer-events: none !important;
    cursor: not-allowed !important;
    user-select: none !important;
}

/* Disable hover effects when loading */
.loading-state:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* Ensure disabled buttons can't be interacted with */
button:disabled,
button[disabled] {
    pointer-events: none !important;
    cursor: not-allowed !important;
    user-select: none !important;
}

/* Extra protection for submit buttons */
button[type="submit"]:disabled,
button[type="submit"][disabled] {
    pointer-events: none !important;
    cursor: not-allowed !important;
    opacity: 0.6 !important;
}

/* Loading state opacity animation */
.loading-state {
    opacity: 0.8;
    transition: opacity 0.2s ease-in-out;
}

/* Pulsing animation for loading buttons */
.loading-state.pulse-loading {
    animation: loading-pulse 1.5s ease-in-out infinite;
}

@keyframes loading-pulse {
    0%, 100% {
        opacity: 0.8;
    }
    50% {
        opacity: 0.6;
    }
}

/* Spinner animation (already defined in Tailwind as animate-spin) */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* Enhanced disabled state styles */
.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Gradient loading animation for gradient buttons */
.loading-state.gradient-loading {
    background: linear-gradient(90deg, 
        rgba(139, 92, 246, 0.8) 0%, 
        rgba(99, 102, 241, 0.8) 25%, 
        rgba(139, 92, 246, 0.8) 50%, 
        rgba(99, 102, 241, 0.8) 75%, 
        rgba(139, 92, 246, 0.8) 100%);
    background-size: 200% 100%;
    animation: loading-gradient 2s ease-in-out infinite;
}

@keyframes loading-gradient {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Loading dots animation */
.loading-dots::after {
    content: '';
    animation: loading-dots-animation 1.5s infinite;
}

@keyframes loading-dots-animation {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

/* Success state animation */
.btn-success {
    background-color: #10b981 !important;
    animation: success-flash 0.6s ease-in-out;
}

@keyframes success-flash {
    0% {
        background-color: inherit;
    }
    50% {
        background-color: #10b981;
        transform: scale(1.05);
    }
    100% {
        background-color: #10b981;
        transform: scale(1);
    }
}

/* Error state animation */
.btn-error {
    background-color: #ef4444 !important;
    animation: error-shake 0.6s ease-in-out;
}

@keyframes error-shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-2px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(2px);
    }
}

/* Loading overlay for complex buttons */
.loading-overlay {
    position: relative;
    overflow: hidden;
}

.loading-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.5s;
    animation: loading-shimmer 2s infinite;
}

@keyframes loading-shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Progress bar for buttons with known progress */
.btn-progress {
    position: relative;
    overflow: hidden;
}

.btn-progress::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    width: var(--progress, 0%);
    transition: width 0.3s ease;
}

/* Micro-interaction enhancements */
.btn-click-effect {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

/* Accessibility improvements for loading states */
.loading-state[aria-busy="true"] {
    position: relative;
}

.loading-state[aria-busy="true"]::before {
    content: attr(data-loading-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0;
    color: transparent;
    /* This helps screen readers announce the loading state */
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    .loading-state {
        opacity: 0.7;
    }
    
    .btn-success {
        background-color: #059669 !important;
    }
    
    .btn-error {
        background-color: #dc2626 !important;
    }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .loading-state,
    .loading-state.pulse-loading,
    .loading-state.gradient-loading,
    .loading-overlay::before,
    .animate-spin {
        animation: none;
    }
    
    .loading-state {
        opacity: 0.6;
    }
}

/* Focus states for keyboard navigation */
.loading-state:focus {
    outline: 2px solid rgba(139, 92, 246, 0.5);
    outline-offset: 2px;
}

/* Mobile touch feedback */
@media (hover: none) and (pointer: coarse) {
    .loading-state {
        opacity: 0.7;
    }
}

/* Button size variants for consistent loading states */
.btn-sm.loading-state .animate-spin {
    width: 1rem;
    height: 1rem;
}

.btn-lg.loading-state .animate-spin {
    width: 1.5rem;
    height: 1.5rem;
}

/* Loading text truncation for smaller buttons */
.btn-sm .loading-text {
    font-size: 0.875rem;
}

.btn-xs .loading-text {
    font-size: 0.75rem;
}

/* Icon-only button loading states */
.btn-icon-only.loading-state {
    min-width: 2.5rem;
}

.btn-icon-only.loading-state .animate-spin {
    margin: 0;
}

/* Utility classes for manual control */
.no-loading {
    /* Override automatic loading detection */
}

.force-loading {
    /* Force loading state */
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .loading-state {
        border: 2px solid currentColor;
        opacity: 0.8;
    }
    
    .animate-spin {
        border: 2px solid currentColor;
        border-top-color: transparent;
        border-radius: 50%;
    }
}