/* Basic Reset & Body Styling */
body {
    margin: 0;
    font-family: sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4; /* Light grey background */
    color: #333; /* Dark grey text */
}

h1, h2 {
    color: #2c3e50; /* Dark blue-grey heading color */
}

ul {
    list-style: none;
    padding: 0;
}

a {
    text-decoration: none;
    color: #3498db; /* Blue link color */
}

a:hover {
    text-decoration: underline;
}

/* Container for centering content */
.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
    overflow: hidden; /* Clear floats */
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: #2c3e50; /* Dark blue-grey background */
    color: #fff;
    padding-top: 20px;
    min-height: 70px;
    border-bottom: #3498db 3px solid; /* Blue bottom border */
}

header h1 {
    float: left;
    margin: 0;
    color: #fff;
}

header nav {
    float: right;
    margin-top: 10px;
}

header li {
    float: left;
    display: inline;
    padding: 0 15px;
}

header a {
    color: #fff;
    font-size: 18px;
}

header a:hover {
    color: #3498db; /* Blue hover color */
    text-decoration: none;
}

/* Main Content Sections */
main {
    padding-top: 30px;
}

.content-section {
    padding: 40px 0;
}

.content-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2em;
}

.alt-bg {
    background-color: #e9e9e9; /* Slightly darker grey for contrast */
}

.content-section ul li {
    margin-bottom: 10px;
    background: #fff; /* White background for list items */
    padding: 10px;
    border-left: #3498db 5px solid;
}

/* Game Section & Iframe */
.game-section {
    text-align: center;
    padding: 20px 0 40px 0;
}

.game-section h2 {
     font-size: 2.5em;
     margin-bottom: 15px;
}

.game-section p {
    font-size: 1.1em;
    margin-bottom: 25px;
}

.iframe-container {
    max-width: 960px; /* Limit iframe width */
    margin: 0 auto 20px auto; /* Center iframe container */
    box-shadow: 0 4px 8px rgba(0,0,0,0.1); /* Subtle shadow */
    background: #000; /* Black background in case iframe loads slow */
}

/* Responsive iframe - maintains aspect ratio if needed, but height is fixed in HTML */
/* Adjust if necessary */
.iframe-container iframe {
    display: block; /* Remove extra space below iframe */
    width: 100%;
}

.controls-reminder {
    font-size: 0.9em;
    color: #555;
    margin-top: 15px;
}

/* Footer */
footer {
    background: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
}

footer p {
    margin: 0;
}

/* Responsive Adjustments */
@media(max-width: 768px) {
    header h1,
    header nav,
    header nav li {
        float: none;
        text-align: center;
        width: 100%;
        padding: 5px 0;
    }

    header nav ul {
        margin-top: 10px;
    }

    .container {
        width: 95%;
        padding: 0 10px;
    }

    .content-section h2, .game-section h2 {
        font-size: 1.8em;
    }
}