* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #667eea, #764ba2);
}

/* CARD */
.card {
  width: min(90%, 420px);
  padding: clamp(20px, 4vw, 35px);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: white;
  margin-bottom: 20px;
}

/* OTP INPUT */
.otpBox {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.digit {
  width: clamp(45px, 10vw, 60px);
  height: clamp(45px, 10vw, 60px);
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  text-align: center;
  border-radius: 10px;
  border: none;
  outline: none;
}

/* BUTTONS */
.buttons {
  display: flex;
  gap: 10px;
}

button {
  flex: 1;
  padding: 12px;
  font-size: clamp(0.9rem, 2vw, 1rem);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: white;
  font-weight: bold;
  transition: 0.3s;
}

button:hover {
  transform: translateY(-2px);
  background: black;
  color: white;
}

#submit:hover {
  background-color: #4caf50;
}

/* RESULT */
.result {
  margin-top: 20px;
}

.win,
.lose {
  display: none;
  padding: 10px;
  border-radius: 8px;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.win {
  background: #4caf50;
  color: white;
}
.lose {
  background: #ff4d4d;
  color: white;
}

/* TOAST */
#toastBox {
  position: fixed;
  top: 10px;
  right: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 10px 15px;
  border-radius: 8px;
  color: white;
  animation: slide 0.3s ease;
}

.toast.success {
  background: #4caf50;
}
.toast.error {
  background: #ff4d4d;
}
.toast.warning {
  background: #ff9800;
}

@keyframes slide {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* CONFETTI */
canvas {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
}