.content-demo-page {
  background: linear-gradient(180deg, #f5f8fd 0%, #eef4fb 100%);
}

.content-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.content-demo {
  border: 1px solid #d9e4f2;
  border-radius: 16px;
  background: #fff;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(22, 45, 74, 0.08);
}

.content-demo-head {
  padding: 14px 14px 0;
}

.content-demo-head h3 {
  margin: 0;
  font-size: 1.1rem;
}

.content-demo-head p {
  margin: 6px 0 10px;
  color: #38506d;
  font-size: 0.95rem;
}

.content-demo-shell {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
  background: #0f243a;
  cursor: pointer;
  user-select: none;
  touch-action: none;
  overscroll-behavior: contain;
  -webkit-tap-highlight-color: transparent;
}

.content-demo-shell,
.content-demo-shell * {
  -webkit-tap-highlight-color: transparent;
}

.content-demo-shell img,
.content-demo-shell video,
.content-demo-shell canvas {
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
}

.content-demo-shell :focus {
  outline: none;
}

.content-demo-toolbar {
  position: absolute;
  right: 10px;
  top: 10px;
  z-index: 20;
}

.content-demo-audio-toggle {
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(7, 18, 34, 0.72);
  color: #fff;
  border-radius: 999px;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.content-demo-audio-toggle svg {
  width: 20px;
  height: 20px;
}

.content-demo-audio-toggle:hover {
  background: rgba(7, 18, 34, 0.9);
}

.content-demo-bg-media,
.content-demo-bg-image,
.content-demo-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.content-demo-bg-media,
.content-demo-bg-image {
  object-fit: cover;
}

.content-demo-canvas {
  pointer-events: none;
}

.content-demo-sprite-layer {
  position: absolute;
  inset: 0;
}

.content-demo-interact-prompt {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 16;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(198, 222, 252, 0.55);
  background: rgba(10, 29, 52, 0.68);
  color: #d7e9ff;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  pointer-events: none;
  animation: content-demo-prompt-float 1.6s ease-in-out infinite;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.content-demo-interact-prompt.is-hiding {
  opacity: 0;
  transform: translate(-50%, -44%);
}

.content-demo-interact-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.content-demo-interact-icon svg {
  width: 18px;
  height: 18px;
}

.content-demo-interact-text {
  white-space: nowrap;
}

.content-demo-loading {
  position: absolute;
  inset: 0;
  z-index: 18;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: radial-gradient(circle at 35% 30%, rgba(23, 67, 112, 0.72), rgba(8, 20, 38, 0.92));
  color: #dcecff;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: opacity 0.24s ease;
}

.content-demo-loading.is-hiding {
  opacity: 0;
  pointer-events: none;
}

.content-demo-loading-spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(220, 236, 255, 0.3);
  border-top-color: #dcecff;
  border-radius: 999px;
  animation: content-demo-spin 0.9s linear infinite;
}

.content-demo-loading-text {
  font-size: 0.9rem;
}

@keyframes content-demo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes content-demo-prompt-float {
  0%,
  100% {
    transform: translate(-50%, -50%);
  }
  50% {
    transform: translate(-50%, -54%);
  }
}

.content-demo-sprite {
  position: absolute;
  width: 58px;
  height: 58px;
  object-fit: contain;
  will-change: transform, opacity;
  transition: opacity 0.18s ease;
  pointer-events: auto;
}

.content-demo-note {
  padding: 10px 14px 14px;
  font-size: 0.82rem;
  color: #49688c;
}

@media (max-width: 980px) {
  .content-demo-grid {
    grid-template-columns: 1fr;
  }
}