body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family: 'Segoe UI', sans-serif;
}

#container {
  margin: 15px auto;
  width: 1100px;
  border-radius: 20px;
  border: 2px ridge crimson;
  padding: 20px;
  text-align: center;
}

@media screen and (max-width: 650px) {
  #container {
    max-width: 500px;
  }
}

@media screen and (max-width: 400px) {
  #container {
    max-width: 350px;
  }
}

#timer, #step {
  font-size: 20px;
  font-family: Verdana;
  margin-bottom: 10px;
}

#btn {
  cursor: pointer;
  outline: none;
  border: none;
  border-radius: 8px;
  padding: 8px;
  background-color: crimson;
  color: white;
  font-size: 15px;
}

#popup-display {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 400px;
  background: linear-gradient(135deg, #f9f9f9, #e0e0ff);
  color: #333;
  padding: 20px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  z-index: 1000;
  text-align: center;
  display: none;
}

#popup-text {
  font-size: 1rem;
  line-height: 1.5;
}

#popup-close {
  margin-top: 15px;
  padding: 10px 20px;
  background-color: #4a90e2;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}

#popup-close:hover {
  background-color: #357ab8;
}

@media (max-width: 480px) {
  #popup-display {
    padding: 15px;
    font-size: 0.9rem;
  }

  #popup-close {
    width: 100%;
  }
}

#overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

#popup {
  display: none;
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  padding: 20px 30px;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
  border-radius: 8px;
  font-size: 18px;
  z-index: 1000;
}

#closeBtn {
  margin-top: 15px;
  padding: 8px 16px;
  background: #007BFF;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#closeBtn:hover {
  background: #0056b3;
}


#footer-section {
  margin: 20px auto;
  font-size: 25px;
  font-family: Tahoma;
  text-align: center;
  text-decoration: none;
  color: rgb(255, 251, 5);
}

#footer-section > p {
  margin: 10px auto;
  font-weight: 500;
}

#footer-section > a > button {
  font-size: 20px;
  outline: none;
  border: none;
  padding: 10px;
  border-radius: 25px;
  font-family: Tahoma;
  cursor: pointer;
  background-color: #333;
  color: white;
}

#footer-section > a > button:hover {
  background-color: crimson;
}