/*
 * WalchandPRO — Enterprise Learning Platform
 * Logo Slider Section Styles
 *
 * Infinite horizontal scroll with edge fade.
 * Logos via logo.dev API, rendered grayscale/muted.
 *
 * Copyright © 2025 Euclideum Solutions Private Limited.
 */

/* ============================================
   Logo Slider Section
   Same bg as courses for seamless blend.
   ============================================ */
.logo-slider-section {
    position: relative;
    padding: 44px 0 16px;
    background-color: #e8f4fc;
    background-image:
        linear-gradient(rgba(21, 79, 149, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21, 79, 149, 0.08) 1px, transparent 1px),
        linear-gradient(rgba(21, 79, 149, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21, 79, 149, 0.04) 1px, transparent 1px);
    background-size:
        80px 80px,
        80px 80px,
        20px 20px,
        20px 20px;
    overflow: hidden;
}

/* Bottom blend: blue hero bg → white courses bg */
.logo-slider-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(to bottom, transparent 0%, #f8fafc 100%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] .logo-slider-section {
    background-color: #0a1628;
    background-image:
        linear-gradient(rgba(96, 165, 250, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.07) 1px, transparent 1px),
        linear-gradient(rgba(96, 165, 250, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.03) 1px, transparent 1px);
    background-size:
        80px 80px,
        80px 80px,
        20px 20px,
        20px 20px;
}

[data-theme="dark"] .logo-slider-section::after {
    background: linear-gradient(to bottom, transparent 0%, #0c1222 100%);
}

@media (min-width: 768px) {
    .logo-slider-section {
        padding: 48px 0 20px;
    }

    .logo-slider-section::after {
        height: 40px;
    }
}

@media (min-width: 1024px) {
    .logo-slider-section {
        padding: 56px 0 24px;
    }

    .logo-slider-section::after {
        height: 44px;
    }
}

/* ============================================
   Header — Heading + Subtitle
   ============================================ */
.logo-slider-header {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 20px;
    margin: 0 0 24px;
}

.logo-slider-heading {
    font-size: 15px;
    font-weight: 600;
    text-transform: uppercase;
    color: #1e3a5f;
    margin: 0 0 6px;
    letter-spacing: 0.04em;
    line-height: 1.4;
}

[data-theme="dark"] .logo-slider-heading {
    color: #60a5fa;
}

.logo-slider-subtitle {
    font-size: 13px;
    font-weight: 400;
    color: #64748b;
    margin: 0 auto;
    line-height: 1.5;
    max-width: 480px;
}

[data-theme="dark"] .logo-slider-subtitle {
    color: #94a3b8;
}

@media (min-width: 768px) {
    .logo-slider-header {
        margin-bottom: 28px;
    }

    .logo-slider-heading {
        font-size: 16px;
        margin-bottom: 8px;
    }

    .logo-slider-subtitle {
        font-size: 14px;
        max-width: 520px;
    }
}

@media (min-width: 1024px) {
    .logo-slider-header {
        margin-bottom: 32px;
    }

    .logo-slider-heading {
        font-size: 17px;
        margin-bottom: 8px;
    }

    .logo-slider-subtitle {
        font-size: 15px;
        max-width: 560px;
    }
}

/* ============================================
   Slider Wrapper — Edge Fade via CSS Mask
   Wide fades keep logos away from screen edge,
   aligned with hero section content boundaries.
   ============================================ */
.logo-slider-wrapper {
    position: relative;
    z-index: 1;
    overflow: hidden;
    --fade-start: 20px;
    --fade-end: 100px;
    mask-image: linear-gradient(
        to right,
        transparent 0px,
        transparent var(--fade-start),
        black var(--fade-end),
        black calc(100% - var(--fade-end)),
        transparent calc(100% - var(--fade-start)),
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0px,
        transparent var(--fade-start),
        black var(--fade-end),
        black calc(100% - var(--fade-end)),
        transparent calc(100% - var(--fade-start)),
        transparent 100%
    );
}

@media (min-width: 480px) {
    .logo-slider-wrapper {
        --fade-start: 30px;
        --fade-end: 120px;
    }
}

@media (min-width: 768px) {
    .logo-slider-wrapper {
        --fade-start: 50px;
        --fade-end: 150px;
    }
}

@media (min-width: 1024px) {
    .logo-slider-wrapper {
        --fade-start: 70px;
        --fade-end: 190px;
    }
}

@media (min-width: 1400px) {
    .logo-slider-wrapper {
        --fade-start: 90px;
        --fade-end: 220px;
    }
}

/* ============================================
   Slider Track — Infinite CSS Animation
   ============================================ */
.logo-slider-track {
    display: flex;
    width: max-content;
    animation: logo-scroll 40s linear infinite;
    will-change: transform;
}

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

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .logo-slider-track {
        animation-play-state: paused;
    }
}

/* ============================================
   Logo List (duplicated for seamless loop)
   Generous gaps give each logo room to breathe.
   ============================================ */
.logo-slider-list {
    display: flex;
    align-items: center;
    gap: 48px;
    padding: 0 24px;
}

@media (min-width: 480px) {
    .logo-slider-list {
        gap: 56px;
        padding: 0 28px;
    }
}

@media (min-width: 768px) {
    .logo-slider-list {
        gap: 72px;
        padding: 0 36px;
    }
}

@media (min-width: 1024px) {
    .logo-slider-list {
        gap: 88px;
        padding: 0 44px;
    }
}

/* ============================================
   Logo Item
   ============================================ */
.logo-item {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    user-select: none;
}

.logo-item img {
    height: 28px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
}

/* Light mode: show .logo-light, hide .logo-dark */
.logo-item .logo-dark {
    display: none;
}

/* Dark mode: show .logo-dark, hide .logo-light */
[data-theme="dark"] .logo-item .logo-light {
    display: none;
}

[data-theme="dark"] .logo-item .logo-dark {
    display: inline;
}

@media (min-width: 768px) {
    .logo-item img {
        height: 32px;
    }
}

@media (min-width: 1024px) {
    .logo-item img {
        height: 36px;
    }
}

.logo-item-name {
    font-size: 15px;
    font-weight: 500;
    color: #1e3a5f;
    letter-spacing: -0.01em;
}

[data-theme="dark"] .logo-item-name {
    color: #94a3b8;
}

@media (min-width: 768px) {
    .logo-item-name {
        font-size: 16px;
    }
}

@media (min-width: 1024px) {
    .logo-item-name {
        font-size: 17px;
    }
}