/**
 * Zero-Bloat Logo Carousel & Continuous Marquee
 * Ultra-Lean 60FPS GPU-Accelerated Stylesheet
 */

:root {
  --zlc-gap: 40px;
  --zlc-logo-height: 60px;
  --zlc-speed: 25s;
  --zlc-opacity-default: 0.7;
  --zlc-opacity-hover: 1;
}

/* Base Wrapper */
.zero-logo-carousel-wrapper {
  position: relative;
  width: 100%;
  overflow-x: clip;     /* clips horizontal marquee only */
  overflow-y: visible;  /* logos never cropped top/bottom */
  padding: 24px 0;
  display: flex;
  align-items: center;
  user-select: none;
  -webkit-user-select: none;
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}

.zero-logo-carousel-wrapper.no-mask {
  mask-image: none;
  -webkit-mask-image: none;
}

/* Continuous Marquee Mode Track — driven by JS requestAnimationFrame */
.zero-logo-marquee-track {
  display: flex;
  align-items: center;
  gap: var(--zlc-gap);
  width: max-content;
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

/* Logo Item */
.zero-logo-item {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: var(--zlc-logo-height);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease, opacity 0.3s ease;
  min-width: 60px;
}

.zero-logo-item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-decoration: none;
  width: 100%;
}

.zero-logo-image-box {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
}

.zero-logo-item img,
.zero-logo-item svg {
  max-height: var(--zlc-logo-height, 60px);
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
  pointer-events: none;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.zero-logo-title {
  display: block;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: #94a3b8;
  margin-top: 8px;
  line-height: 1.3;
  transition: color 0.3s ease;
  white-space: nowrap;
}

/* Hover Effects & Color Filters */
/* Grayscale to Full Color */
.zero-filter-grayscale .zero-logo-item img,
.zero-filter-grayscale .zero-logo-item svg {
  filter: grayscale(100%) contrast(90%);
  opacity: var(--zlc-opacity-default);
}

.zero-filter-grayscale .zero-logo-item:hover img,
.zero-filter-grayscale .zero-logo-item:hover svg {
  filter: grayscale(0%) contrast(100%);
  opacity: var(--zlc-opacity-hover);
  transform: translateY(-2px) scale(1.06);
}

/* Dim to Bright */
.zero-filter-dim .zero-logo-item img,
.zero-filter-dim .zero-logo-item svg {
  opacity: var(--zlc-opacity-default);
}

.zero-filter-dim .zero-logo-item:hover img,
.zero-filter-dim .zero-logo-item:hover svg {
  opacity: var(--zlc-opacity-hover);
  transform: translateY(-2px) scale(1.05);
}

/* Always Color with subtle lift */
.zero-filter-color .zero-logo-item img,
.zero-filter-color .zero-logo-item svg {
  opacity: 0.92;
}

.zero-filter-color .zero-logo-item:hover img,
.zero-filter-color .zero-logo-item:hover svg {
  opacity: 1;
  transform: translateY(-2px) scale(1.06);
}

/* Invert filter (for dark mode) */
.zero-filter-invert .zero-logo-item img,
.zero-filter-invert .zero-logo-item svg {
  filter: brightness(0) invert(1);
  opacity: 0.7;
}

.zero-filter-invert .zero-logo-item:hover img,
.zero-filter-invert .zero-logo-item:hover svg {
  filter: none;
  opacity: 1;
  transform: translateY(-2px) scale(1.06);
}

/* Tooltip Styling */
.zero-logo-item[data-tooltip] {
  position: relative;
}

.zero-logo-item[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #0f172a;
  color: #f8fafc;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.1);
  z-index: 10;
}

.zero-logo-item[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Step Carousel Mode */
.zero-logo-carousel-wrapper.mode-step-carousel {
  mask-image: none;
  -webkit-mask-image: none;
}

.zero-logo-slider-container {
  width: 100%;
  overflow: hidden;
  position: relative;
}

.zero-logo-slider-track {
  display: flex;
  gap: var(--zlc-gap);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

.zero-logo-slider-track .zero-logo-item {
  flex-shrink: 0;
}

/* Navigation Controls (Step Mode) */
.zero-logo-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: all 0.2s ease;
}

.zero-logo-nav-btn:hover {
  background: #38bdf8;
  color: #0f172a;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.zero-logo-nav-prev { left: 10px; }
.zero-logo-nav-next { right: 10px; }

/* Pagination Dots */
.zero-logo-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
}

.zero-logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: all 0.3s ease;
}

.zero-logo-dot.active {
  width: 24px;
  background: #38bdf8;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}