* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #000;
  font-family: 'Inter', sans-serif;
  touch-action: none; /* Prevent default pull-to-refresh and swipe nav */
}

#app-container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.page {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: transform;
}

/* Page 1 (Grid) Default State */
#page1 {
  transform: translateX(0%);
}

/* Page 2 (Random) Default State (Off-screen Right) */
#page2 {
  transform: translateX(100%);
  background-color: #ff0055; /* Will be randomized */
}

/* When Page 2 is active */
body.page2-active #page1 {
  transform: translateX(-100%);
}
body.page2-active #page2 {
  transform: translateX(0%);
}

/* Page 1 Specifics */
#scrubber-area {
  width: 100%;
  height: 100%;
  padding: 20px;
  background-color: #000;
  /* Ensure the scrubber area receives touch events everywhere */
}

#grid-container {
  width: max-content;
  height: 100%;
  margin: 0 auto;
  background-color: #fff;
  border-radius: 24px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
#grid-container::-webkit-scrollbar {
  display: none;
}

#emoji-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 10px;
}

.emoji-item {
  font-size: 48px;
  width: 64px;
  height: 64px;
  line-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: transform 0.1s;
}

.emoji-item:active {
  transform: scale(0.8);
}

/* Toast */
#toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.5);
  background: rgba(0, 0, 0, 0.85);
  padding: 40px;
  border-radius: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  z-index: 100;
  backdrop-filter: blur(10px);
}

#toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

#toast-emoji {
  font-size: 100px;
  line-height: 1;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
}

/* Dark / Night Mode: White outer box, Black middle box */
@media (prefers-color-scheme: dark) {
  body, html {
    background-color: #fff;
  }

  #scrubber-area {
    background-color: #fff;
  }

  #grid-container {
    background-color: #000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  }

  #toast {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 20px 40px rgba(0,0,0,0.35);
  }
}

/* Page 2 Specifics */
#random-circle {
  position: absolute;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  cursor: pointer;
  user-select: none;
}

#random-emoji {
  font-size: 10px; /* Base size, will be scaled inline */
  line-height: 1;
  pointer-events: none; /* Let taps pass to circle */
}