/**
 * Logo Carousel Component Styles
 *
 * CSS-only horizontal auto-scroll carousel with grayscale logos.
 * Features pause-on-hover and reduced motion support.
 *
 * @package AITSC_Pro_Theme
 * @subpackage Components
 * @since 4.0.0
 */

/* ============================================================
   LOGO CAROUSEL - BASE STYLES
   ============================================================ */

.aitsc-logo-carousel {
    width: 100%;
    background-color: var(--aitsc-bg-secondary, #F8FAFC);
    padding: var(--space-12, 3rem) 0;
    overflow: hidden;
}

.aitsc-logo-carousel__header {
    max-width: var(--aitsc-container-width, 1400px);
    margin: 0 auto var(--space-8, 2rem);
    padding: 0 var(--space-4, 1rem);
    text-align: center;
}

.aitsc-logo-carousel__title {
    font-family: var(--aitsc-font-heading, 'Manrope', sans-serif);
    font-size: var(--font-size-2xl, 1.5rem);
    font-weight: 600;
    color: var(--aitsc-text-secondary, #475569);
    margin: 0;
    letter-spacing: var(--letter-spacing-normal, 0);
}

/* ============================================================
   CAROUSEL WRAPPER & TRACK
   ============================================================ */

.aitsc-logo-carousel__wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    /* Mask gradient for smooth fade at edges */
    mask-image: linear-gradient(
        to right,
        transparent 0%,
        black 5%,
        black 95%,
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0%,
        black 5%,
        black 95%,
        transparent 100%
    );
}

.aitsc-logo-carousel__track {
    display: flex;
    gap: var(--space-12, 3rem);
    width: max-content;
    animation: carousel-scroll var(--carousel-speed, 30s) linear infinite;
}

/* Pause animation on hover */
.aitsc-logo-carousel__track:hover {
    animation-play-state: paused;
}

/* ============================================================
   CAROUSEL ITEMS
   ============================================================ */

.aitsc-logo-carousel__item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    height: 80px;
    padding: var(--space-4, 1rem);
}

.aitsc-logo-carousel__link {
    display: block;
    width: 100%;
    height: 100%;
    transition: transform var(--aitsc-transition-normal, 0.3s);
}

.aitsc-logo-carousel__link:hover {
    transform: scale(1.05);
}

.aitsc-logo-carousel__link:focus-visible {
    outline: 2px solid var(--aitsc-border-focus, #005cb2);
    outline-offset: 4px;
    border-radius: var(--aitsc-radius-sm, 2px);
}

/* ============================================================
   LOGO STYLES
   ============================================================ */

.aitsc-logo-carousel__logo {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    /* Grayscale effect */
    filter: grayscale(100%) opacity(0.6);
    transition: filter var(--aitsc-transition-normal, 0.3s);
}

.aitsc-logo-carousel__link:hover .aitsc-logo-carousel__logo,
.aitsc-logo-carousel__link:focus .aitsc-logo-carousel__logo {
    filter: grayscale(0%) opacity(1);
}

/* ============================================================
   PLACEHOLDER STYLES (when no logo image provided)
   ============================================================ */

.aitsc-logo-carousel__placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background-color: var(--aitsc-bg-primary, #FFFFFF);
    border: 2px solid var(--aitsc-border, #E2E8F0);
    border-radius: var(--aitsc-radius-sm, 2px);
    padding: var(--space-4, 1rem);
    transition: border-color var(--aitsc-transition-normal, 0.3s);
}

.aitsc-logo-carousel__link:hover .aitsc-logo-carousel__placeholder,
.aitsc-logo-carousel__link:focus .aitsc-logo-carousel__placeholder {
    border-color: var(--aitsc-primary, #005cb2);
}

.aitsc-logo-carousel__placeholder span {
    font-family: var(--aitsc-font-main, 'Manrope', sans-serif);
    font-size: var(--font-size-sm, 0.875rem);
    font-weight: 600;
    color: var(--aitsc-text-muted, #64748B);
    text-align: center;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ============================================================
   KEYFRAME ANIMATION
   ============================================================ */

@keyframes carousel-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

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

/* Mobile: 320px - 767px */
@media (max-width: 767px) {
    .aitsc-logo-carousel {
        padding: var(--space-8, 2rem) 0;
    }

    .aitsc-logo-carousel__title {
        font-size: var(--font-size-lg, 1.125rem);
    }

    .aitsc-logo-carousel__track {
        gap: var(--space-8, 2rem);
    }

    .aitsc-logo-carousel__item {
        min-width: 140px;
        height: 60px;
    }
}

/* Tablet: 768px - 1023px */
@media (min-width: 768px) and (max-width: 1023px) {
    .aitsc-logo-carousel {
        padding: var(--space-10, 2.5rem) 0;
    }

    .aitsc-logo-carousel__title {
        font-size: var(--font-size-xl, 1.25rem);
    }

    .aitsc-logo-carousel__track {
        gap: var(--space-10, 2.5rem);
    }

    .aitsc-logo-carousel__item {
        min-width: 160px;
        height: 70px;
    }
}

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
    .aitsc-logo-carousel__item {
        min-width: 200px;
        height: 90px;
    }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .aitsc-logo-carousel__track {
        animation: none !important;
    }

    .aitsc-logo-carousel__track {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-6, 1.5rem);
    }

    .aitsc-logo-carousel__wrapper {
        mask-image: none;
        -webkit-mask-image: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .aitsc-logo-carousel__logo {
        filter: grayscale(100%) opacity(1);
    }

    .aitsc-logo-carousel__placeholder {
        border-width: 3px;
    }
}