* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: #000;
  overflow: hidden;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: #eaeaea;
}

/* Fullscreen video */
.bg-video {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  background: #000;
}

/* Floating UI */
.ui {
  position: fixed;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: grid;
  gap: 8px;
  justify-items: center;
  pointer-events: none; /* lets clicks pass through except controls */
}

.sound {
  pointer-events: auto;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(0,0,0,0.55);
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
}

.sound:hover {
  background: rgba(0,0,0,0.7);
}

.hint {
  margin: 0;
  font-size: 13px;
  opacity: 0.7;
  background: rgba(0,0,0,0.45);
  padding: 4px 10px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

/* Footer */
.footer {
  position: fixed;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  opacity: 0.6;
  z-index: 2;
  pointer-events: none;
}