* {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: whitesmoke;
    color: black;
}

.navbar {
    background-color: white;
    padding: 15px 30px;
    border-bottom: 2px solid lightgray;
}

.navbar-logo {
    font-size: 22px;
    font-weight: bold;
    color: blue;
    text-decoration: none;
    float: left;
}

.navbar-links {
    float: right;
    list-style: none;
}

.navbar-links li {
    display: inline;
    margin-left: 20px;
}

.navbar-links a {
    text-decoration: none;
    color: black;
    padding: 8px 12px;
}

.navbar-links a.active {
    background-color: blue;
    color: white;
}

.clearfix {
    clear: both;
}

.category-nav {
    background-color: lightgray;
    padding: 10px 30px;
    display: flex;
    justify-content: space-between;
}

.category-nav a {
    color: black;
    text-decoration: none;
    margin-right: 20px;
}

.container {
    padding: 20px;
    margin: 30px;
}

.hero {
    background-color: blue;
    color: white;
    text-align: center;
    padding: 50px 20px;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 40px;
    margin-bottom: 10px;
}

.hero p {
    font-size: 18px;
}

.section {
    background-color: white;
    padding: 25px;
    margin-bottom: 25px;
    border: 1px solid lightgray;
}

.section h2 {
    color: blue;
    font-size: 22px;
    margin-bottom: 15px;
    border-bottom: 2px solid blue;
    padding-bottom: 8px;
}

.section p {
    color: gray;
    line-height: 1.7;
    margin-bottom: 10px;
}

.ugc-section {
    background-color: lightyellow;
    border-left: 4px solid orange;
}

.ugc-section h2 {
    color: darkorange;
    border-bottom-color: orange;
}

.ugc-section ul {
    margin-left: 25px;
    margin-top: 10px;
    color: brown;
}

.ugc-section li {
    margin-bottom: 5px;
}

.page-header {
    background-color: white;
    text-align: center;
    padding: 30px;
    margin-bottom: 25px;
    border: 1px solid lightgray;
}

.page-header h1 {
    color: blue;
    font-size: 30px;
    margin-bottom: 8px;
}

.page-header p {
    color: gray;
}

.category {
    margin-bottom: 40px;
}

.category-title {
    background-color: lavender;
    color: darkblue;
    padding: 12px 15px;
    font-size: 20px;
    margin-bottom: 20px;
    border-left: 4px solid blue;
}

.courses-grid {
    display: inline-block;
}

.course-card {
    background-color: white;
    border: 1px solid lightgray;
    padding: 20px;
    width: 280px;
    height: 250px;
    margin-right: 20px;
    margin-bottom: 20px;
    display: inline-block;
    vertical-align: top;
}

.course-card h3 {
    font-size: 18px;
    color: black;
    margin-bottom: 8px;
}

.course-card .platform {
    color: blue;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 8px;
}

.course-card .badges {
    margin-bottom: 10px;
}

.badge-free {
    background-color: lightgreen;
    color: darkgreen;
    padding: 3px 8px;
    font-size: 12px;
    margin-right: 8px;
}

.badge-certificate {
    background-color: lightyellow;
    color: brown;
    padding: 3px 8px;
    font-size: 12px;
}

.course-card .description {
    color: gray;
    font-size: 14px;
    line-height: 1.5;
}

.course-card .link {
    margin-top: 10px;
}

.course-card .link a {
    color: blue;
}

.info-box {
    background-color: lightblue;
    padding: 20px;
    margin-top: 15px;
}

.info-box p {
    margin-bottom: 8px;
    color: black;
}

.footer {
    background-color: darkgray;
    color: white;
    text-align: center;
    padding: 25px;
    margin-top: 30px;
}

.footer p {
    margin-bottom: 5px;
    font-size: 14px;
}

.footer-highlight {
    color: blue;
    font-weight: bold;
}

.text-center {
    text-align: center;
}