.certs-lb {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) + 40);
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: #ffffff;
  overflow: hidden;
}

.certs-lb::backdrop {
  background: rgb(8 10 16 / 0.88);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.certs-lb__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-out;
  -webkit-tap-highlight-color: transparent;
}

.certs-lb__shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: min(100%, 56rem);
  height: 100%;
  min-height: 0;
  margin-inline: auto;
  padding:
    calc(0.75rem + var(--safe-top))
    var(--pad)
    calc(0.75rem + var(--safe-bottom));
  gap: 0.85rem;
  pointer-events: none;
}

.certs-lb__shell > * {
  pointer-events: auto;
}

.certs-lb__close {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 1px solid rgb(255 255 255 / 0.22);
  border-radius: var(--radius);
  background: rgb(20 24 36 / 0.72);
  color: #ffffff;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.certs-lb__close:hover,
.certs-lb__close:focus-visible {
  background: rgb(20 24 36 / 0.92);
  outline: none;
}

.certs-lb__viewport {
  position: relative;
  width: min(100%, 56rem);
  max-height: min(72vh, 40rem);
  overflow: hidden;
  touch-action: pan-y;
  -webkit-user-select: none;
  user-select: none;
}

.certs-lb__track {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  height: 100%;
  transition: transform 0.28s var(--ease-out);
  will-change: transform;
}

.certs-lb__slide {
  flex: 0 0 100%;
  display: grid;
  place-items: center;
  min-width: 0;
  padding: 0 0.25rem;
}

.certs-lb__slide img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: min(68vh, 38rem);
  object-fit: contain;
  background: #ffffff;
  border: 1px solid rgb(255 255 255 / 0.16);
}

.certs-lb__nav {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border: 1px solid rgb(255 255 255 / 0.22);
  border-radius: var(--radius);
  background: rgb(20 24 36 / 0.72);
  color: #ffffff;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
  -webkit-tap-highlight-color: transparent;
}

.certs-lb__nav--prev { left: 0; }
.certs-lb__nav--next { right: 0; }

.certs-lb__nav:hover,
.certs-lb__nav:focus-visible {
  background: rgb(20 24 36 / 0.92);
  outline: none;
}

.certs-lb__nav:disabled {
  opacity: 0.35;
  cursor: default;
}

.certs-lb__cap {
  margin: 0;
  max-width: 36ch;
  text-align: center;
  color: rgb(255 255 255 / 0.72);
  font-size: 0.95rem;
  line-height: 1.4;
}

.certs-lb__dots {
  display: flex;
  gap: 0.45rem;
  justify-content: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.certs-lb__dot {
  width: 0.45rem;
  height: 0.45rem;
  border: 0;
  border-radius: 50%;
  padding: 0;
  background: rgb(255 255 255 / 0.35);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.certs-lb__dot.is-active {
  background: var(--red);
}

.about-certs__frame--zoom {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 1px solid rgb(20 24 36 / 0.16);
  border-radius: 0;
  background: var(--bg);
  box-shadow: 0 0 0 1px rgb(255 255 255 / 0.8) inset;
  cursor: zoom-in;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.about-certs__frame--zoom:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.about-certs__frame--zoom img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: var(--bg);
  pointer-events: none;
}

@media (min-width: 768px) {
  .certs-lb__viewport {
    max-height: min(78vh, 46rem);
  }

  .certs-lb__slide img {
    max-height: min(74vh, 44rem);
  }

  .certs-lb__nav--prev { left: -0.25rem; }
  .certs-lb__nav--next { right: -0.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  .certs-lb__track { transition: none; }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .certs-lb::backdrop {
    background: rgb(8 10 16 / 0.94);
  }
}