.mc-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.digit-box {
  width: min(50vw, 180px);
  height: min(50vw, 180px);
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 3px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(3.2rem, 16vw, 5.5rem);
  font-weight: 800;
  color: var(--accent);
  box-shadow: var(--shadow);
  user-select: none;
  transition: border-color 0.15s, background 0.15s;
}
.digit-box.blank {
  color: transparent;
  border-color: var(--border);
}

.mc-status {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
  min-height: 1.3em;
  text-align: center;
}

.mc-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 420px;
}
.mc-slot {
  width: 34px;
  height: 42px;
  border: 2px solid var(--border-strong);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--cell-bg);
  color: var(--text);
}
.mc-slot.current { border-color: var(--accent); }
.mc-slot.correct { border-color: var(--success); background: var(--success-bg); color: var(--success); }
.mc-slot.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
  animation: mc-shake 0.35s ease;
}

@keyframes mc-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.keypad {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  max-width: 360px;
  width: 100%;
}
.keypad-btn {
  padding: 12px 0;
  font-size: 1.15rem;
  font-weight: 700;
}