:root {
  color-scheme: dark;
  --background: #242424;
  --control-background: rgba(15, 15, 15, 0.58);
  --control-border: rgba(255, 255, 255, 0.18);
  --control-text: rgba(255, 255, 255, 0.9);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background: var(--background);
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
}

.viewer {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: var(--background);
  isolation: isolate;
}

.pages {
  display: flex;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  touch-action: pan-x pinch-zoom;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
}

.pages:active {
  cursor: grabbing;
}

.pages:focus-visible {
  outline: 2px solid rgba(222, 167, 124, 0.92);
  outline-offset: -2px;
}

.pages::-webkit-scrollbar {
  display: none;
}

.slide {
  position: relative;
  display: flex;
  flex: 0 0 100vw;
  width: 100vw;
  height: 100%;
  margin: 0;
  padding: clamp(0px, 0.7vw, 10px);
  align-items: center;
  justify-content: center;
  scroll-snap-align: start;
  scroll-snap-stop: normal;
  overflow: hidden;
  background: var(--background);
}

.slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.controls {
  position: fixed;
  inset: auto max(14px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) auto;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--control-text);
  opacity: 1;
  transition: opacity 260ms ease;
}

.viewer.controls-hidden .controls,
.viewer.controls-hidden .swipe-cue {
  opacity: 0;
  pointer-events: none;
}

.sound-toggle,
.page-status {
  display: grid;
  min-width: 42px;
  height: 42px;
  padding: 0 12px;
  place-items: center;
  color: inherit;
  background: var(--control-background);
  border: 1px solid var(--control-border);
  border-radius: 999px;
  box-shadow: 0 7px 24px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.sound-toggle {
  width: 42px;
  padding: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.sound-toggle:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.sound-toggle svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.sound-toggle .sound-off {
  display: none;
}

.sound-toggle[aria-pressed="false"] .sound-on {
  display: none;
}

.sound-toggle[aria-pressed="false"] .sound-off {
  display: block;
}

.page-status {
  display: flex;
  gap: 5px;
  min-width: 70px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.page-status .divider {
  opacity: 0.46;
}

.swipe-cue {
  position: fixed;
  bottom: max(20px, env(safe-area-inset-bottom));
  left: 50%;
  z-index: 2;
  width: 54px;
  height: 25px;
  opacity: 0.82;
  transform: translateX(-50%);
  transition: opacity 300ms ease;
  pointer-events: none;
}

.swipe-cue::before,
.swipe-cue::after {
  position: absolute;
  top: 8px;
  width: 8px;
  height: 8px;
  content: "";
  border-top: 1.5px solid rgba(255, 255, 255, 0.86);
  border-right: 1.5px solid rgba(255, 255, 255, 0.86);
}

.swipe-cue::before {
  left: 4px;
  transform: rotate(-135deg);
}

.swipe-cue::after {
  right: 4px;
  transform: rotate(45deg);
}

.swipe-cue span {
  position: absolute;
  top: 12px;
  left: 14px;
  width: 26px;
  height: 1px;
  background: rgba(255, 255, 255, 0.72);
  animation: swipe 1.5s ease-in-out infinite;
}

.viewer.has-interacted .swipe-cue {
  opacity: 0;
}

@keyframes swipe {
  0%,
  100% {
    transform: scaleX(0.5);
    opacity: 0.45;
  }
  50% {
    transform: scaleX(1);
    opacity: 1;
  }
}

@media (max-width: 700px) {
  .slide {
    padding: 0;
  }

  .controls {
    inset: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) auto auto;
  }

  .sound-toggle,
  .page-status {
    height: 38px;
  }

  .sound-toggle {
    width: 38px;
    min-width: 38px;
  }

  .page-status {
    min-width: 64px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pages {
    scroll-behavior: auto;
  }

  .swipe-cue span {
    animation: none;
  }
}