*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  margin: 0;
  background: #020617;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.cube-workspace {
  perspective: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 60px;
}

.cube-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  transform-style: preserve-3d;
  animation: spin-cube 3s infinite cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

@keyframes spin-cube {
  0% { transform: rotateX(0deg) rotateY(0deg); }
  33% { transform: rotateX(180deg) rotateY(0deg); }
  66% { transform: rotateX(180deg) rotateY(180deg); }
  100% { transform: rotateX(360deg) rotateY(360deg); }
}

.cube-face {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(59, 130, 246, 0.2);
  border: 2px solid #3b82f6;
  box-shadow: inset 0 0 20px rgba(59, 130, 246, 0.5), 0 0 20px rgba(59, 130, 246, 0.2);
}

/* Mathematically accurate cube assembly securely placed */
.cube-front  { transform: rotateY(0deg) translateZ(40px); }
.cube-back   { transform: rotateY(180deg) translateZ(40px); }
.cube-right  { transform: rotateY(90deg) translateZ(40px); }
.cube-left   { transform: rotateY(-90deg) translateZ(40px); }
.cube-top    { transform: rotateX(90deg) translateZ(40px); }
.cube-bottom { transform: rotateX(-90deg) translateZ(40px); }

.loading-label {
  color: #38bdf8;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin: 0;
  animation: pulse-op 1.5s infinite alternate;
}

@keyframes pulse-op {
  to { opacity: 0.3; }
}