:root {
  --cubie: 60px;
  --babson-green: #006644;
  --bg: #004a31;
  --panel: #005a3c;
  --text: #ffffff;
  --muted: #b9d6c9;
  --accent: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  text-align: center;
}

h1 {
  margin: 8px 0 4px;
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: 0.02em;
}

.hint {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.status {
  display: flex;
  justify-content: center;
  gap: 24px;
  min-height: 1.5em;
}

#message {
  color: #ffffff;
  font-weight: 600;
}

.viewport {
  position: relative;
  height: calc(var(--cubie) * 6);
  perspective: calc(var(--cubie) * 16);
  touch-action: none;
  user-select: none;
  cursor: grab;
}

.viewport.dragging {
  cursor: grabbing;
}

.scene {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  transform-style: preserve-3d;
}

.cubie {
  position: absolute;
  width: var(--cubie);
  height: var(--cubie);
  margin-left: calc(var(--cubie) / -2);
  margin-top: calc(var(--cubie) / -2);
  transform-style: preserve-3d;
}

.face {
  position: absolute;
  inset: 0;
  background: #111;
  backface-visibility: hidden;
}

.face.front  { transform: translateZ(calc(var(--cubie) / 2)); }
.face.back   { transform: rotateY(180deg) translateZ(calc(var(--cubie) / 2)); }
.face.right  { transform: rotateY(90deg) translateZ(calc(var(--cubie) / 2)); }
.face.left   { transform: rotateY(-90deg) translateZ(calc(var(--cubie) / 2)); }
.face.top    { transform: rotateX(90deg) translateZ(calc(var(--cubie) / 2)); }
.face.bottom { transform: rotateX(-90deg) translateZ(calc(var(--cubie) / 2)); }

.sticker {
  position: absolute;
  inset: 5%;
  border-radius: 12%;
  cursor: pointer;
}

.controls {
  margin-top: 12px;
}

.move-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  max-width: 420px;
  margin: 0 auto 12px;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

button {
  padding: 8px 12px;
  border: 1px solid #2f8063;
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

.actions button {
  min-width: 110px;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--babson-green);
}

.sticker.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--babson-green);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(var(--cubie) * 0.16);
  font-weight: 700;
  letter-spacing: 0.04em;
}