body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: white;

  background-image: url("bg.jpg");
  background-size: cover;
  background-position: center;
}

/* SCREEN SYSTEM */
.screen {
  display: none;
  height: 100vh;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.screen.active {
  display: flex;
}

/* GLASS BUTTONS */
.btn {
  padding: 12px 20px;
  margin: 10px;
  border-radius: 12px;
  font-size: 16px;

  background: rgba(255,255,255,0.08);
  color: white;

  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(6px);
  cursor: pointer;
}

.red { border-color: rgba(255,80,80,0.5); }
.blue { border-color: rgba(80,160,255,0.5); }

/* LOCK */
.lock { text-align: center; }

.dots span {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin: 5px;
  background: gray;
  border-radius: 50%;
}

/* KEYPAD */
.pad {
  display: grid;
  grid-template-columns: repeat(3, 60px);
  gap: 10px;
  margin-top: 20px;
}

.pad button {
  padding: 15px;
  font-size: 18px;
  border-radius: 10px;
  border: none;
  background: #222;
  color: white;
}

/* DISC */
.disc {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 20px auto;
  animation: spin 2s linear infinite;
}

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

/* SECRET */
#secret2 {
  background: rgba(0,0,0,0.6);
  text-align: center;
}

#secret2 img {
  width: 80%;
  max-width: 300px;
  border-radius: 12px;
}