body {
  margin: 0;
  background: #f5f7fa;
}

.stroop-page {
  font-family: Arial, sans-serif;
  max-width: 520px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

h1 {
  font-size: 32px;
  color: #003d52;
  text-transform: uppercase;
}

.instructions {
  font-size: 19px;
  background: #e8f8ff;
  padding: 14px;
  border-radius: 12px;
}

#wordBox {
  font-size: 48px;
  font-weight: bold;
  margin: 30px 0;
  text-transform: uppercase;
  animation: fade .3s ease;
}

@keyframes fade {
  0% {opacity: .2;}
  100% {opacity: 1;}
}

.btn-area {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 18px;
  margin-bottom: 30px;
}

.color-btn {
  border: none;
  padding: 18px;
  border-radius: 12px;
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  color: #000;
}

#resetStroopBtn, #winStroopResetBtn {
  margin-top: 10px;
  padding: 12px 30px;
  background: #0077cc;
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 20px;
  cursor: pointer;
}

#winStroopMessage {
  display: none;
  background: #d4ffd6;
  padding: 26px;
  border-radius: 15px;
  margin-top: 26px;
  font-size: 24px;
  color: #006622;
  font-weight: bold;
}

/* feedback */
#feedbackIcon {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  font-size: 90px;
  display: none;
  z-index: 9999;
  pointer-events: none;
}