/* style.css */

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: white;
  text-align: center;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

h1 {
  font-size: 3rem;
  margin: 0.5rem 0;
}

h2 {
  font-size: 1.5rem;
  margin: 1rem 0;
  opacity: 0.9;
}

#startBtn {
  padding: 10px 20px;
  font-size: 1.2rem;
  margin-bottom: 2rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background-color: #f39c12;
  color: white;
  font-weight: bold;
  transition: background 0.3s;
}
#startBtn:hover {
  background-color: #e67e22;
}

.btn-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.line1,
.line2 {
  display: flex;
  gap: 1rem;
}

.btn {
  width: 120px;
  height: 120px;
  border-radius: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  font-weight: bold;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.red {
  background-color: #e74c3c;
}

.green {
  background-color: #2ecc71;
}

.blue {
  background-color: #3498db;
}

.yellow {
  background-color: #f1c40f;
  color: #333;
}

.pressed {
  box-shadow: 0 0 25px white;
  opacity: 0.7;
  transform: scale(0.95);
}

@media (max-width: 600px) {
  .btn {
    width: 80px;
    height: 80px;
    font-size: 1.2rem;
  }

  #startBtn {
    font-size: 1rem;
    padding: 8px 16px;
  }
}