/**
 * Accessible Logo Carousel - Frontend Styles
 * No background color - inherits from parent
 * Responsive sizing and spacing with CSS custom properties
 */

/* CSS Custom Properties with defaults */
.alc-carousel {
    --alc-outline-color: #6366f1;
    --alc-logo-bg: #ffffff;
    --alc-nav-bg: #1e293b;
    --alc-nav-color: #ffffff;
    --alc-dot-active: #6366f1;
    --alc-dot-inactive: #cbd5e1;
    --alc-focus-color: #fbbf24;
    --alc-visible-count: 4;
    --alc-logo-height: 80px;
    --alc-logo-spacing: 24px;
    --alc-logo-padding: 15px;
    --alc-border-width: 0px;
    --alc-border-radius: 12px;
    --alc-container-border-width: 0px;
    --alc-container-border-radius: 0px;
    --alc-container-padding: 20px;
    --alc-container-border-color: #e2e8f0;
    
    /* Responsive scaling factor */
    --alc-scale: 1;
    
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--alc-container-padding);
    padding-left: calc(var(--alc-container-padding) + 30px);
    padding-right: calc(var(--alc-container-padding) + 30px);
    box-sizing: border-box;
    border: var(--alc-container-border-width) solid var(--alc-container-border-color);
    border-radius: var(--alc-container-border-radius);
}

/* Adjust padding when arrows are hidden */
.alc-carousel.alc-no-arrows {
    padding-left: var(--alc-container-padding);
    padding-right: var(--alc-container-padding);
}

/* Screen reader only content */
.alc-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip link - visible on focus */
.alc-skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
    z-index: 100;
}

.alc-skip-link:focus {
    left: 50%;
    transform: translateX(-50%);
    top: -40px;
    width: auto;
    height: auto;
    padding: 8px 16px;
    background: var(--alc-nav-bg);
    color: var(--alc-nav-color);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

/* Viewport - contains the track */
.alc-viewport {
    overflow: hidden;
    width: 100%;
    padding: 20px 0;
    margin: -20px 0;
    /* Allows shadows and hover effects to be visible */
}

/* Track - the sliding container */
.alc-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    margin: 0 calc(var(--alc-logo-spacing) * var(--alc-scale) * -0.5);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .alc-track {
        transition: none;
    }
    
    .alc-logo-link,
    .alc-nav-btn,
    .alc-dot {
        transition: none !important;
    }
}

/* Individual slide */
.alc-slide {
    flex: 0 0 calc(100% / var(--alc-visible-count));
    padding: 0 calc(var(--alc-logo-spacing) * var(--alc-scale) * 0.5);
    box-sizing: border-box;
}

/* Logo link/container */
.alc-logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: calc(var(--alc-logo-height) * var(--alc-scale));
    padding: calc(var(--alc-logo-padding) * var(--alc-scale));
    background: var(--alc-logo-bg);
    border: var(--alc-border-width) solid var(--alc-outline-color);
    border-radius: var(--alc-border-radius);
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    box-sizing: border-box;
}

/* Circle style */
.alc-circle-style .alc-logo-link {
    width: calc(var(--alc-logo-height) * var(--alc-scale));
    height: calc(var(--alc-logo-height) * var(--alc-scale));
    border-radius: 50%;
    margin: 0 auto;
    padding: calc(var(--alc-logo-padding) * var(--alc-scale) * 0.8);
}

/* Drop shadow */
.alc-has-shadow .alc-logo-link {
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 
                0 8px 10px -6px rgba(0, 0, 0, 0.08);
}

/* Hover states */
.alc-logo-link:hover {
    transform: translateY(-4px) scale(1.02);
}

.alc-has-shadow .alc-logo-link:hover {
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15), 
                0 12px 20px -8px rgba(0, 0, 0, 0.12);
}

/* Focus states - high visibility for accessibility */
.alc-logo-link:focus {
    outline: 3px solid var(--alc-focus-color);
    outline-offset: 3px;
}

.alc-logo-link:focus:not(:focus-visible) {
    outline: none;
}

.alc-logo-link:focus-visible {
    outline: 3px solid var(--alc-focus-color);
    outline-offset: 3px;
}

/* Logo image - maintain aspect ratio mode */
.alc-maintain-aspect .alc-logo-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* Logo image - fill mode */
.alc-logo-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* Placeholder for logos without images */
.alc-logo-placeholder {
    font-size: 14px;
    font-weight: 600;
    color: #64748b;
    text-align: center;
    padding: 10px;
}

/* Navigation buttons */
.alc-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--alc-nav-bg);
    color: var(--alc-nav-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    z-index: 10;
}

.alc-nav-prev {
    left: 0;
}

.alc-nav-next {
    right: 0;
}

.alc-nav-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.alc-nav-btn:focus {
    outline: 3px solid var(--alc-focus-color);
    outline-offset: 2px;
}

.alc-nav-btn:focus:not(:focus-visible) {
    outline: none;
}

.alc-nav-btn:focus-visible {
    outline: 3px solid var(--alc-focus-color);
    outline-offset: 2px;
}

.alc-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.alc-nav-btn svg {
    width: 20px;
    height: 20px;
}

/* Hide arrows when disabled */
.alc-no-arrows .alc-nav-btn {
    display: none;
}

/* Dot indicators */
.alc-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

/* Hide dots when disabled */
.alc-no-dots .alc-dots {
    display: none;
}

.alc-dot {
    width: 12px;
    height: 12px;
    border-radius: 6px;
    border: none;
    background: var(--alc-dot-inactive);
    cursor: pointer;
    padding: 0;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.alc-dot:hover {
    background: var(--alc-dot-active);
    opacity: 0.7;
}

.alc-dot:focus {
    outline: 2px solid var(--alc-focus-color);
    outline-offset: 2px;
}

.alc-dot:focus:not(:focus-visible) {
    outline: none;
}

.alc-dot:focus-visible {
    outline: 2px solid var(--alc-focus-color);
    outline-offset: 2px;
}

.alc-dot[aria-selected="true"],
.alc-dot.alc-dot-active {
    width: 32px;
    background: var(--alc-dot-active);
}

/* Pause indicator */
.alc-pause-indicator {
    position: absolute;
    top: var(--alc-container-padding);
    right: calc(var(--alc-container-padding) + 30px);
    background: rgba(30, 41, 59, 0.9);
    color: #ffffff;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: none;
    align-items: center;
    gap: 6px;
}

.alc-no-arrows .alc-pause-indicator {
    right: var(--alc-container-padding);
}

.alc-pause-indicator.alc-visible {
    display: flex;
}

.alc-pause-dot {
    width: 8px;
    height: 8px;
    background: #fbbf24;
    border-radius: 50%;
}

/* No logos message */
.alc-no-logos {
    text-align: center;
    padding: 40px 20px;
    color: #64748b;
    font-style: italic;
}

/* Error message */
.alc-error {
    text-align: center;
    padding: 20px;
    color: #dc2626;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .alc-logo-link {
        border-width: 4px;
    }
    
    .alc-nav-btn {
        border: 2px solid currentColor;
    }
    
    .alc-dot {
        border: 2px solid var(--alc-dot-active);
    }
}

/* Responsive adjustments with scaling */
@media (max-width: 1200px) {
    .alc-carousel {
        --alc-scale: 0.95;
    }
}

@media (max-width: 1024px) {
    .alc-carousel {
        --alc-scale: 0.9;
        --alc-responsive-max: 3;
    }
}

@media (max-width: 768px) {
    .alc-carousel {
        --alc-scale: 0.85;
        --alc-responsive-max: 2;
    }
    
    .alc-nav-btn {
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 480px) {
    .alc-carousel {
        --alc-scale: 0.8;
        --alc-responsive-max: 1;
    }
    
    .alc-nav-btn {
        width: 32px;
        height: 32px;
    }
    
    .alc-nav-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* Focus within carousel container for keyboard navigation */
.alc-carousel:focus {
    outline: none;
}

.alc-carousel:focus-visible {
    outline: 2px dashed var(--alc-focus-color);
    outline-offset: 4px;
}

/* Hidden slides for screen readers but visible to sighted users */
.alc-slide[aria-hidden="true"] .alc-logo-link {
    pointer-events: none;
}

.alc-slide[aria-hidden="true"] a {
    tabindex: -1;
}