/**
 * mod_logoscroll — Logo Scroll Carousel
 * (C) 2026 PureGlowMedia. All rights reserved.
 * GNU General Public License version 2 or later
 */

/* ============================================================
   1. Container
   ============================================================ */
.logoscroll {
    --logoscroll-height: 100px;
    --logoscroll-gap: 40px;
    --logoscroll-duration: 30s;
    --logoscroll-radius: 0px;
    --logoscroll-item-bg: transparent;
    --logoscroll-item-padding: 0px;

    position: relative;
    width: 100%;
    overflow: hidden;
    height: var(--logoscroll-height);
    box-sizing: border-box;
}

/* ============================================================
   2. Track — shared between continuous and slide modes
   ============================================================ */
.logoscroll__track {
    display: flex;
    align-items: center;
    height: 100%;
    width: 100%;
}

/* ============================================================
   3. Strip — holds the logo items in a row
   ============================================================ */
.logoscroll__strip {
    display: flex;
    align-items: center;
    gap: var(--logoscroll-gap);
    flex-shrink: 0;
}

/* ============================================================
   4. Individual item & logo image
   ============================================================ */
.logoscroll__item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: var(--logoscroll-height);
    padding: var(--logoscroll-item-padding);
    box-sizing: border-box;
    background: var(--logoscroll-item-bg);
    border-radius: var(--logoscroll-radius);
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.35s ease,
                filter 0.35s ease;
}

.logoscroll__logo {
    display: block;
    max-height: 100%;
    width: auto;
    height: auto;
    max-width: 200px;
    object-fit: contain;
    aspect-ratio: auto;
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                filter 0.35s ease,
                opacity 0.35s ease;
}

/* ============================================================
   5. Link wrapper
   ============================================================ */
.logoscroll__link {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.logoscroll--linked .logoscroll__item {
    cursor: pointer;
}

/* ============================================================
   6. Continuous / Linear mode — CSS animation
   ============================================================ */
.logoscroll--continuous .logoscroll__track {
    width: max-content;
    gap: var(--logoscroll-gap);
    animation: logoscroll-scroll var(--logoscroll-duration) linear infinite;
}

/* LTR: scroll left (default) */
.logoscroll--continuous.logoscroll--ltr .logoscroll__track {
    animation-name: logoscroll-scroll-ltr;
}

/* RTL: scroll right */
.logoscroll--continuous.logoscroll--rtl .logoscroll__track {
    animation-name: logoscroll-scroll-rtl;
}

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

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

/* Pause on hover */
.logoscroll--pause-hover:hover .logoscroll__track {
    animation-play-state: paused;
}

/* ============================================================
   7. Slide mode — JS-controlled transitions
   ============================================================ */
.logoscroll__track--slide {
    overflow: hidden;
}

.logoscroll--slide .logoscroll__strip {
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Navigation buttons */
.logoscroll__controls {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    pointer-events: none;
    padding: 0 6px;
}

.logoscroll__btn {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    opacity: 0;
    line-height: 1;
}

.logoscroll:hover .logoscroll__btn {
    opacity: 1;
}

.logoscroll__btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

.logoscroll__btn:focus-visible {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
    opacity: 1;
}

/* ============================================================
   8. Grayscale modifier
   ============================================================ */
.logoscroll--grayscale .logoscroll__logo {
    filter: grayscale(100%);
}

.logoscroll--grayscale .logoscroll__item:hover .logoscroll__logo {
    filter: grayscale(0%);
}

/* ============================================================
   9. Hover effects
   ============================================================ */

/* --- Zoom: scale up the logo --- */
.logoscroll--hover-zoom .logoscroll__item:hover .logoscroll__logo {
    transform: scale(1.06);
}

/* --- Lift: raise the whole card with a shadow --- */
.logoscroll--hover-lift .logoscroll__item:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* --- Glow: coloured outline pulse --- */
.logoscroll--hover-glow .logoscroll__item:hover {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.35),
                0 0 18px rgba(59, 130, 246, 0.18);
}

/* --- Bounce: playful spring --- */
@keyframes logoscroll-bounce {
    0%   { transform: translateY(0); }
    30%  { transform: translateY(-8px); }
    50%  { transform: translateY(0); }
    70%  { transform: translateY(-4px); }
    100% { transform: translateY(0); }
}

.logoscroll--hover-bounce .logoscroll__item:hover {
    animation: logoscroll-bounce 0.5s ease;
}

/* --- Tilt: subtle 3D rotation --- */
.logoscroll--hover-tilt .logoscroll__item {
    perspective: 600px;
}

.logoscroll--hover-tilt .logoscroll__item:hover .logoscroll__logo {
    transform: rotateY(-8deg) rotateX(4deg) scale(1.04);
}

/* ============================================================
  10. Entrance animations (triggered by IntersectionObserver)
   ============================================================ */

/* Shared: hide until visible */
.logoscroll[class*="logoscroll--entrance-"] {
    opacity: 0;
}

.logoscroll[class*="logoscroll--entrance-"].logoscroll--visible {
    opacity: 1;
}

/* --- Fade Up --- */
.logoscroll--entrance-fade-up {
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.logoscroll--entrance-fade-up.logoscroll--visible {
    transform: translateY(0);
}

/* --- Fade In --- */
.logoscroll--entrance-fade-in {
    transition: opacity 0.8s ease;
}

/* --- Scale In --- */
.logoscroll--entrance-scale-in {
    transform: scale(0.9);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.logoscroll--entrance-scale-in.logoscroll--visible {
    transform: scale(1);
}

/* ============================================================
  11. Separators between logos
   ============================================================ */
.logoscroll__sep {
    flex-shrink: 0;
    display: inline-block;
    align-self: center;
}

/* --- Dot --- */
.logoscroll--sep-dot .logoscroll__sep {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.2);
}

/* --- Vertical line --- */
.logoscroll--sep-line .logoscroll__sep {
    width: 1px;
    height: calc(var(--logoscroll-height) * 0.4);
    min-height: 20px;
    background: rgba(0, 0, 0, 0.25);
}

/* --- Diamond --- */
.logoscroll--sep-diamond .logoscroll__sep {
    width: 7px;
    height: 7px;
    background: rgba(0, 0, 0, 0.15);
    transform: rotate(45deg);
}

/* ============================================================
  12. Edge fade-out masks
   ============================================================ */
.logoscroll--continuous::before,
.logoscroll--continuous::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 60px;
    z-index: 2;
    pointer-events: none;
}

.logoscroll--continuous::before {
    left: 0;
    background: linear-gradient(to right, rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%);
}

.logoscroll--continuous::after {
    right: 0;
    background: linear-gradient(to left, rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%);
}

/* ============================================================
  13. Reduced motion — respect prefers-reduced-motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .logoscroll--continuous .logoscroll__track {
        animation-play-state: paused;
    }

    .logoscroll--slide .logoscroll__strip {
        transition: none;
    }

    .logoscroll[class*="logoscroll--entrance-"] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .logoscroll--hover-bounce .logoscroll__item:hover {
        animation: none;
    }
}

/* ============================================================
  14. Responsive tweaks
   ============================================================ */
@media (max-width: 768px) {
    .logoscroll__logo {
        max-width: 140px;
    }

    .logoscroll--continuous::before,
    .logoscroll--continuous::after {
        width: 30px;
    }

    .logoscroll__btn {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
}