body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #d1e7ff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 300px;
    background: #87CEEB;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    position: relative; /* Add this */
}

.header, .footer {
    background: #006994;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

.header {
    border-bottom: 2px solid #004d73;
}

.footer {
    border-top: 2px solid #004d73;
    justify-content: space-around;
    border-radius: 15px;
}

.main {
    padding: 20px;
    text-align: center;
    color: white;
    position: relative; /* Add this */
    
}

.main h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

.graphics {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative; /* Add this */
}

.graphics img {
    width: 300px;
    margin: 10px 0;
}

.bigpic {
    width: 300px; /* Change to match container width */
}

.invisible-button {
    position: absolute;
    background: none;
    border: none;
    cursor: pointer;
    width: 100px; /* Adjust size as needed */
    height: 50px; /* Adjust size as needed */
    opacity: 0;
}

.fish1-button {
    top: 100px; /* Adjust position */
    left: 0px; /* Adjust position */
}

.fish2-button {
    top: 25px; /* Adjust position */
    right: 0px; /* Adjust position */
}

.turtle-button {
    top: 200px; /* Adjust position */
    left: 140px; /* Adjust position */
}

.fish3-button {
    top: 285px; /* Adjust position */
    left: 2px; /* Adjust position */
}

.nav-item {
    font-size: 24px;
    cursor: pointer;
}