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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: rgb(170, 165, 165); /* Light neutral background */
    color: #333333; /* Dark gray for readability */
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 3em; /* Larger, impactful header */
    color: #222222; /* Almost black for strong emphasis */
}

header p {
    font-size: 1.5em; /* Slightly larger subtitle */
    color: #006C67; /* Muted teal for accent */
    margin-top: 10px;
}

/* Main Content */
main {
    margin: 0 auto;
    padding: 20px;
}

/* Lesson Sections */
.lesson {
    background: #FFFFFF; /* White background for each section */
    padding: 50px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05); /* Light shadow */
}

.lesson h2 {
    color: #222222;
    font-size: 2em; /* Prominent but smaller than main header */
    margin-bottom: 10px;
}

.lesson h3 {
    font-size: 1.4em;
    color: #333333;
    margin-top: 10px;
    margin-bottom: 5px;
}

.lesson p, .lesson li {
    font-size: 1em; /* Standard body text size */
    color: #555555; /* Medium gray for secondary text */
    margin-bottom: 10px;
}

.lesson strong {
    color: #222222;
}

/* Code Block Styling */
pre {
    background-color: #f7f7f9; /* Slightly off-white background */
    padding: 15px;
    border-left: 3px solid #006C67; /* Accent teal border */
    overflow-x: auto;
    border-radius: 4px;
    font-size: 0.9em; /* Slightly smaller for code */
}

code {
    font-family: Consolas, monospace;
    color: #d14; /* Standard code color */
}

/* Links */
a {
    color: #006C67; /* Teal accent color */
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline; /* Underline on hover for clarity */
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.9em;
    color: #888888;
    padding-bottom: 20px;
}