* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: gray;
  font-family: Arial, sans-serif;
  text-align: center;
  padding: 20px;
}

/* Layout structure */
.page-layout {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    gap: 20px;
}

/* Sidebar ads */
.side-ad {
  width: 160px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-ad img {
  width: 100%;
  border-radius: 8px;
  margin: 0 auto;
}
/* Main content */
.main-content {
    flex: 1;
    max-width: 800px;
    background-color: #f4f4f4;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    margin: 0 auto;
}

/* Buttons */
button {
  margin: 10px;
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background-color: #3498db;
  color: white;
}

#mainMenuBtn {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 1100;
  background: #2ecc71;
}

.top-right-buttons {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.top-right-buttons button {
    width: 120px;
    background: #2ecc71;
}
#panel {
  display: none;
  margin-top: 20px;
  padding: 20px;
  border: 2px solid #333;
  background-color: #fff;
  border-radius: 8px;
}

/* Scoreboard */
#scoreboard {
  margin-top: 20px;
  background-color: #ddd;
  padding: 15px;
  border-radius: 10px;
}

#scoreboard p {
  margin: 0 auto;
  font-weight: bold;
}

/* Message box */
#message {
  background: goldenrod;
  color: white;
  border-radius: 5px;
  max-width: 300px;
  margin: 20px auto;
  padding: 10px;
  text-align: center;
}

/* Shop section */
#shop {
  margin-top: 20px;
  background-color: #fff;
  padding: 20px;
  border-radius: 10px;
  border: 2px solid #333;
}
.shop-item {
  display: block;
  margin: 10px auto;
  padding: 10px 20px;
  background-color: #e67e22;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}


/* Rotating ad */
.rotating-ad {
  margin-top: 20px;
}

.rotating-ad img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 10px;
}

/* Responsive layout */
@media (max-width: 768px) {
    .main-content {
        flex: 1;
        max-width: 800px;
        background-color: #f4f4f4;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 0 10px rgba(0,0,0,0.1);
        margin: 0 auto;
    }

  .side-ad {
    flex-direction: row;
    justify-content: center;
    width: 100%;
  }


  #mainMenuBtn,
  #settingsBtn {
    position: static;
    margin: 10px;
  }
}

/* Popup background overlay */

.hidden {
    display: none;
}

#popupWindow {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border: 2px solid black;
    z-index: 1000;
}



/* Popup box */
.popup-box {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    min-width: 250px;
}

.main-content > div {
    text-align: center;
}

#startBtn,
#continueGameBtn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 20px;
    font-size: 18px;
}

#continueGameBtn {
    display: none;
}