body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
    height: 100vh; /* Ensure body height takes up the full viewport */
    display: flex;
    flex-direction: column;
    align-items: center; /* Center horizontally */
    justify-content: start; /* Keeps the title at the top */
}

h1 {
    margin: 20px; /* Add some spacing below the title */
    text-align: center;
}

#content {
    display: flex;
    flex-direction: column;
    justify-content: center; /* Centers vertically */
    align-items: center; /* Centers horizontally */
    flex-grow: 1; /* Ensures the content takes up available space */
}

.panel-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center; /* Centers horizontally */
    gap: 10px;
}

.panel {
    width: 150px;
    height: 100px;
    background-color: #ffffff;
    border: 1px solid #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.panel:hover {
    background-color: #f5f5f5;
}

.selected {
    background-color: #ffd700; /* Gold color for the selected panel */
}

.btn {
    padding: 15px 30px;
    background-color: #3498db;
    color: #ffffff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #2980b9;
}

/* Base styling for the button-like anchor element */
a.button {
    display: inline-block; /* Makes sure it's not inline text, but behaves like a block element */
    padding: 10px 20px;    /* Padding for inner space */
    background-color: #3498db; /* Button background color (blue) */
    color: #ffffff;        /* Text color (white) */
    text-decoration: none; /* Removes underline */
    border: 1px solid #2980b9; /* Border for a defined edge */
    border-radius: 5px;    /* Rounds the corners */
    font-size: 16px;       /* Adjusts the font size */
    text-align: center;    /* Centers text within the button */
    cursor: pointer;       /* Shows a pointer cursor on hover */
    transition: background-color 0.3s; /* Smooth transition for hover effect */
}

/* Hover effect for the button-like anchor */
a.button:hover {
    background-color: #2980b9; /* Changes background color on hover */
    color: #ffffff;           /* Ensures text stays white on hover */
}

/* Focus effect for the button-like anchor (for accessibility) */
a.button:focus {
    outline: none;           /* Removes default browser outline */
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3); /* Adds custom focus shadow */
}