:root {
  --slide-w: 1920;
  --slide-h: 1080;
  --fit-scale: 1;
  --slide-duration: 650ms;
  --slide-easing: cubic-bezier(0.76, 0, 0.24, 1);
  --letterbox-bg: #0a0a0a;
}

.deck {
  position: fixed;
  inset: 0;
  will-change: transform;
  transform: translate3d(0, 0, 0);
  transition: transform var(--slide-duration) var(--slide-easing);
}

.deck.is-instant {
  transition: none;
}

.slide {
  width: 100vw;
  height: 100vh;
  position: relative;
  background: var(--letterbox-bg);
  overflow: hidden;
}

.slide__canvas {
  width: 1920px;
  height: 1080px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(var(--fit-scale));
  transform-origin: center center;
  background: #ffffff;
  overflow: hidden;
}

.slide__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  grid-auto-flow: row;
  gap: 24px;
  color: #d4d4d4;
  user-select: none;
}

.slide__placeholder-num {
  font-size: 320px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.slide__placeholder-title {
  font-size: 48px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #9a9a9a;
}

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