.c3 {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  user-select: none;
  touch-action: pan-y;
}

.c3__stage {
  position: relative;
  height: 420px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

@media (max-width: 900px) {
  .c3__stage { height: 340px; }
}
@media (max-width: 600px) {
  .c3__stage { height: 280px; }
}

.c3__slide {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(72%, 760px);
  height: 100%;
  display: grid;
  place-items: center;
  pointer-events: none;
  opacity: 0;
  transition: transform 260ms ease, opacity 220ms ease, filter 220ms ease;
}

.c3__slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 14px 40px rgba(0,0,0,.25);
  background: rgba(0,0,0,.04);
}

.c3__slide.is-prev,
.c3__slide.is-next,
.c3__slide.is-current {
  opacity: 1;
}

.c3__slide.is-current {
  transform: translate(-50%, -50%) scale(1);
  z-index: 3;
  pointer-events: auto;
}

.c3__slide.is-prev {
  transform: translate(calc(-50% - 38%), -50%) scale(.86);
  z-index: 2;
  filter: saturate(.85);
}

.c3__slide.is-next {
  transform: translate(calc(-50% + 38%), -50%) scale(.86);
  z-index: 2;
  filter: saturate(.85);
}

@media (max-width: 700px) {
  .c3__slide { width: 86%; }
  .c3__slide.is-prev { transform: translate(calc(-50% - 30%), -50%) scale(.88); }
  .c3__slide.is-next { transform: translate(calc(-50% + 30%), -50%) scale(.88); }
}

.c3__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  z-index: 10;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(6px);
  opacity: .95;
}

.c3__btn:hover { opacity: 1; }
.c3__btn:disabled { opacity: .25; cursor: default; }

.c3__btn--prev { left: 10px; }
.c3__btn--next { right: 10px; }

.c3__btn--prev::before,
.c3__btn--next::before {
  content: "";
  display: block;
  width: 10px;
  height: 10px;
  margin: 0 auto;
  border-right: 3px solid #fff;
  border-bottom: 3px solid #fff;
}

.c3__btn--prev::before { transform: rotate(135deg); }
.c3__btn--next::before { transform: rotate(-45deg); }

/* Lightbox */
.c3__lb {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 99999;
}

.c3__lb.is-open { display: block; }

.c3__lb__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.78);
}

.c3__lb__content {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
}

.c3__lb__img {
  max-width: min(1100px, 92vw);
  max-height: 86vh;
  object-fit: contain;
  border-radius: 14px;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
  background: rgba(255,255,255,.06);
}

.c3__lb__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: 22px;
  line-height: 44px;
  text-align: center;
}

.c3__lb__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 54px;
  height: 54px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: rgba(0,0,0,.55);
}

.c3__lb__nav:disabled { opacity: .25; cursor: default; }

.c3__lb__nav--prev { left: 14px; }
.c3__lb__nav--next { right: 14px; }

.c3__lb__nav--prev::before,
.c3__lb__nav--next::before {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  margin: 0 auto;
  border-right: 3px solid #fff;
  border-bottom: 3px solid #fff;
}
.c3__lb__nav--prev::before { transform: rotate(135deg); }
.c3__lb__nav--next::before { transform: rotate(-45deg); }