* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0a0a0a;
  color: #f2f2f2;
}

.display-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 10px;
}

.panel {
  background: #151515;
  border: 1px solid #2f2f2f;
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 20px);
}

.panel-label {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 20;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.05em;
}

.stack {
  position: relative;
  width: 100%;
  height: 100%;
}

.placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #8d8d8d;
  font-size: 34px;
  letter-spacing: 0.2em;
}

.layer-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 768px) {
  .display-page {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(3, 100vh);
  }

  .panel {
    min-height: 100vh;
  }
}