:root {
  color-scheme: light;
  --bg: #efe7da;
  --bg-accent: #d7c4a6;
  --panel: rgba(255, 252, 247, 0.82);
  --ink: #23190f;
  --muted: #6a5a4a;
  --shadow: 0 4px 14px rgba(38, 24, 10, 0.05);
  --radius: 14px;
  --page-width: min(100vw - 4px, 440px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.72), transparent 34%),
    linear-gradient(180deg, #f7f1e7 0%, var(--bg) 40%, #e8dccb 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
  overscroll-behavior: none;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.52), transparent 24%),
    radial-gradient(circle at 80% 0%, rgba(215, 196, 166, 0.44), transparent 26%);
}

.app {
  position: relative;
  width: 100%;
  min-height: 100vh;
  padding: calc(env(safe-area-inset-top) + 2px) 0 calc(env(safe-area-inset-bottom) + 6px);
}

.pages {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100vw;
  height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 4px);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: 0;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  touch-action: pan-x;
}

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

.pages.is-zoomed {
  overflow-x: hidden;
  scroll-snap-type: none;
}

.page-card {
  position: relative;
  width: var(--page-width);
  height: min(100%, calc(var(--page-width) * 2.16));
  margin: auto;
  overflow: hidden;
  border-radius: var(--radius);
  border: none;
  background: transparent;
  box-shadow: var(--shadow);
  transform: translateZ(0);
  scroll-snap-align: center;
  scroll-snap-stop: always;
  content-visibility: auto;
  contain-intrinsic-size: 100vw 100vh;
}

.page-card__frame {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    transparent;
  touch-action: pan-x;
}

.page-card__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      110deg,
      rgba(255, 255, 255, 0) 20%,
      rgba(255, 255, 255, 0.62) 38%,
      rgba(255, 255, 255, 0) 54%
    );
  transform: translateX(-100%);
  animation: shimmer 2.4s infinite;
}

.page-card.is-loaded .page-card__frame::before {
  display: none;
}

.page-card__media {
  width: 100%;
  height: 100%;
  transform: translate3d(var(--tx, 0px), var(--ty, 0px), 0) scale(var(--scale, 1));
  transform-origin: center center;
  transition: transform 180ms ease-out;
  will-change: transform;
}

.page-card.is-gesture .page-card__media {
  transition: none;
}

.page-card__image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  opacity: 0;
  transform: translate3d(22px, 0, 0) scale(0.985);
  transition: opacity 320ms ease, transform 460ms cubic-bezier(0.22, 1, 0.36, 1);
  backface-visibility: hidden;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.page-card.is-loaded .page-card__image {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

.page-card.is-zoomed .page-card__frame {
  touch-action: none;
}


.music-toggle {
  position: fixed;
  top: calc(env(safe-area-inset-top) + 10px);
  right: 14px;
  z-index: 4;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  background: rgba(35, 25, 15, 0.72);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 24px rgba(35, 25, 15, 0.16);
}

.music-toggle.is-playing {
  background: rgba(89, 61, 25, 0.84);
}

.music-toggle:active {
  transform: scale(0.96);
}

.music-toggle__disc {
  position: relative;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.95) 0 2px, transparent 2px), linear-gradient(135deg, #f5d07b 0%, #d38f35 48%, #7a4a19 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.music-toggle__disc::before,
.music-toggle__disc::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  border: 1px solid rgba(35, 25, 15, 0.18);
}

.music-toggle__disc::after {
  inset: 5px;
}

.music-toggle.is-playing .music-toggle__disc {
  animation: music-spin 2.8s linear infinite;
}

.pager {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 6px);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(35, 25, 15, 0.72);
  color: rgba(255, 255, 255, 0.82);
  transform: translateX(-50%);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 36px rgba(35, 25, 15, 0.22);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.pager__current {
  color: #fff;
  font-weight: 700;
  min-width: 2ch;
  text-align: right;
}

.pager__divider,
.pager__total {
  opacity: 0.72;
}

@keyframes music-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  to {
    transform: translateX(100%);
  }
}

@media (min-width: 768px) {
  .app {
    padding-top: 28px;
  }

  .pages {
    height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 6px);
  }
}